Статті в журналах: "Pipe mill"

1

Goncharuk, Aleksander V., Viktor A. Fadeev, and Maksim V. Kadach. "Seamless Pipes Manufacturing Process Improvement Using Mandreling." Solid State Phenomena 316 (April 2021): 402–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.402.

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The paper discusses the specific aspects of hot rolled seamless pipes manufacture using pipe rolling plants including screw-rolling mills. The method of accuracy enhancement of pipe dimensions, as well as external and internal surface quality improvement, is proposed. The article specifies the results of computer and physical modeling of the pipes mandreling process. The application of the mandreling process within the cage using different diameter mandrels is shown. We managed to decrease the typical mark caused by the metal deformation, due to the screw-rolling mill and to manufacture pipes with more accurate dimensions, as a result of the mandreling process modeling. The results of the physical experiment on mandreling the shell pierced at the screw-rolling mill showed a positive effect from the process of hollow billet cold treatment using the mandrel.

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2

Pavlov, D. A., Aleksandr Aleksandrovich Bogatov, and E. A. Pavlova. "Modernization of Hot-Rolled Tubes Rolling Method." Solid State Phenomena 265 (September 2017): 1048–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.1048.

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A new method of hot-rolled pipes rolling on the automatic tandem mill is suggested. It consists of two rolling stands. This method allows achieving the rough pipe preovalisation before reaching the automatic mill. The rough pipe preovalisation provides even groove filling and the decrease of pipe wall thickness variation. The rough pipe preovalisation will allow increasing the elongation ratio from 1.5 to 2.0 on the lengthwise rolling stand no. 1 and decreasing the elongation ratio on the piercing mill, therefore the chance of rolling skin formation on the external surface of the pipe is decreased. The way to reduce the probability of the formation of a guide mark defect due to the kinematic tension during rolling on a stub mandrel with rough tube preovalisation is investigated. The influence of the kinematic tension factor on the pipe forming in the groove taper at a lengthwise rolling with rough tube preovalisation is explored.

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3

Rakhmanov, S. R., and V. V. Povorotniy. "Complex study of deformation mode of working stand of pipes cold rolling mill." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information, no. 9 (September 25, 2018): 93–100. http://dx.doi.org/10.32339/0135-5910-2018-9-93-100.

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Elaboration of main concepts of working stands reconstruction, providing an increase of their operation strength and improving of rolled pipes quality and at the same time a decrease of metal intensity is an actual task. Solving of the task will result to a great extent in expanding of technological possibilities and increasing of productivity pipe cold rolling mills.Results of complex study of deformation mode of working stands of pipe cold pilger mills of different designs presented. Influence of working stands parameters both existing and of rational designs on quality of rolled pipes determined. The study determined, that thanks to application of roller installation with ring roll passes and new bearings an expansion of technological possibilities of ХПТ 32 mill reached. Increase of rolled pipes quality was reached by utilization in the drive line of ХПТ 32 mill a modernized working stand of rational design, which has a high operation reliability and an increased rigidity.

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4

Katsumura, T., Kazutoshi Ishikawa, Atsushi Matsumoto, Shunsuke Sasaki, Yasushi Kato, and Jun Yanagimoto. "Development of Finite Element Analysis Model for Plug Mill Rolling." Key Engineering Materials 622-623 (September 2014): 899–904. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.899.

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In the seamless pipe rolling process, the pipe wall thickness is largely determined at the mandrel mill or plug mill. It is possible to obtain the target thickness at these mills by defining the gap of a grooved roll and an inside tool such as a plug. However, the thickness of the free deformation part, which is not in contact with the roll and tool, had generally been estimated by experimental techniques. Although a number of analytical studies of mandrel mill rolling had been reported, few reports had examined plug mill rolling. Therefore, in this research, a finite element analysis model for plug mill rolling was developed by extending the rigid plasticity finite element model "Computational Rolling Mill (CORMILL)." Good agreement between the calculated results and experimental results was obtained for the wall thickness, and it was found that the thickness of the flange part decreases with reduction of the wall thickness at the grooved bottom. These results suggested that the wall thickness distribution of rolled pipes can be controlled by using a suitable inside tool and roll shape in each rolling pass, and the necessary shapes can be obtained by using the newly-developed model.

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5

Karmiadji, Djoko W., and Gery Setiadi. "ANALISIS PEMBUATAN PIPA BAJA SISTEM DUA BAGIAN LAS ASTM A139 DENGAN MENGGUNAKAN METODA LSAW = MANUFACTUR ANALYSIS DUAL SEAM WELD STEEL PIPE ASTM A139 BY USING LSAW METHODE." Material Komponen dan Konstruksi 14, no. 1 (June 1, 2014): 29. http://dx.doi.org/10.29122/mkk.v14i1.1652.

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One of the main components of the manufacture of steel pipe is in the form of plate steel sheet, slab or hot roll coil, which of these materials may be made for various types of pipes, among others, seamless, Electric Wire Resistance, Spiral and Longitudinal pipes.The main material used welding steel pipe is a steel plate or hot roll coil. Material procurement dependence becomes an obstacle for welding steel pipe mill, which at this moment in our country's steel mills have not been able to produce material of diameter of 24 "steel pipe used primarily in the oil and gas sector.In this research, the analysis of welded steel pipe manufacture using local plate material consisting of two sections then welded with GMAW and SMAW welding type, where the manufacture of welded steel pipe with dimensions Ø 28 "x 8.7 mm x 12.000 mm is done using the LSAW (Longitudinal Sub Merged Arc Welding) method. Mechanical testing and inspection conducted in accordance with ASTM A139.Based on the analysis of the results of testing and inspection, it can be concluded that the method of manufacture of welded steel pipes using dual seam weld longitudinal submerged arc welding compliant as required in the standard ASTM A139.Keywords : steel pipe, dual seam weld, ASTM A139Abstrak Salah satu komponen utama dari pembuatan pipa baja adalah baja berupa plat lembaran, slab atau hot roll coil, dimana dari bahan ini dapat dibuat berbagai jenis pipa antara lain pipa seamless, pipa Electric Wire Resistance, pipa Spiral, dan Pipa Longitudinal.Material utama pipa baja las yang digunakan adalah plat baja atau hot roll coil. Ketergantungan pengadaan material menjadi kendala bagi pabrik pipa baja las, dimana pada saat ini pabrik baja di negara kita belum mampu memproduksi bahan pipa baja berdiameter lebih dari 24” terutama digunakan pada sektor minyak dan gas.Pada penelitian ini dilakukan analisis pembuatan pipa baja las dengan menggunakan bahan plat lokal yang terdiri dari dua bagian kemudian di las dengan jenis las GMAW dan SMAW, dimana pembuatan pipa baja las dengan dimensi Ø 28” x 8,7 mm x 12.000 mm dilakukan menggunakan metoda LSAW (Longitudinal Sub Merged Arc Welding). Teknik pengujian dan pemeriksaan dilakukan dengan mengacu pada standar ASTM A139.Berdasarkan analisis hasil pengujian dan pemeriksaan, dapat di simpulkan bahwa metode pembuatan pipa baja las menggunakan metode dual seam weld longitudinal submerged arc welding memenuhi persyaratan standar sebagaimana yang dipersyaratkan pada standar ASTM A139.Kata kunci: pipa baja, las dua bagian, ASTM A139

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6

Rakhmanov, S. R. "Some peculiarities of the process of the pipe purse firmware on the firmware." Metallurgicheskaya i gornorudnaya promyshlennost, no. 1 (2019): 31–39. http://dx.doi.org/10.33101/s001-1700087840.

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Purpose. Conducting research aimed at choosing the rational modes of flashing the tubular billet by stabilizing the dynamic characteristics of the drive power line of heavy-duty piercing mills TPA. Methodology. The dynamics of the power line of the piercing mill of the pipe-rolling unit (TPA) are considered, taking into account the peculiarities of the behavior of the spindle hinges and the mechanism for setting the work rolls. Findings. The differential equation of motion of the line of the main drive of the piercing mill is composed and its numerical solution is given. An adapted three-mass dynamic model of the system is considered and a solution is obtained using the software Solid Works IT Simulation X. The basic conditions for the occurrence of unstable dynamic phenomena in the fieldline and the installation mechanism of the piercing mill rolls are formulated. It is shown that the unstable dynamics of the system are one of the main reasons for the discrepancy between the results of well-known theoretical, experimental studies and pipe thickness measurement at TPA 350 piercing mills. Originality. The main causes of the emergence of parametric oscillations in the drive of the working stand of the piercing mill, the installation mechanism of the work rolls in connection with the mechanism of formation of the thin-wall thickness of pipes are established. The areas of stability of the system’s functioning are determined depending on the operating modes and the angle of feed of the work rolls, taking into account the spatial position of the elements of the spindle device. The necessary and sufficient stability conditions for the joint stable functioning of the power line elements of the piercing mill are formed. Practical value. To stabilize the processes for flashing the tubular billet, a scheme has been proposed for upgrading the spindles of the main drive and the mechanism for installing the work rolls of the piercing mill No. 1 of TPA 350. The results are applicable to similar helical rolling mills. Keywords: firmware, billet, mill, pipe, uneven stroke, varying thickness, dynamics, drive, roll, oscillations, spindle, Cardan, hinge, moment of inertia, rigidity, drum, installation mechanism, stability.

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7

Orlov, G. A., A. G. Orlov, and E. A. Kungurov. "A review of pipes reduction methods aimed at end longitudinal different-walled decreasing." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 1 (February 2, 2019): 86–94. http://dx.doi.org/10.32339/0135-5910-2019-1-86-94.

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Formation of incrassate pipes end is one of main drawbacks of pipes reducing with tensioning method. Therefore, the matter of perfection of reducing mills designs, rollers passes, rolling regimes aimed at end shearing decreasing is very actual. A review of steel pipes hot rolling methods at multi-stand reduction-tensioning mills was carried out, aimed at elaborating of measures for decreasing of end longitudinal different-walled. Techniques of pipe end parts rolling considered, including control of rotary speed regimes of adjacent stands rollers; changing of distance between stands; increasing of pipe end parts temperature to facilitate their tapering; increasing inter-stands tension at the expense of magnetic field application. Also such techniques were considered as application of a short fixed mount in the first mill stand; use of endless reducing; use of idler stands, making breaking down effect and increase of tension. Analysis results of the patent search with utilization of internet-resources showed, that a method of tension increasing at the expense of rollers rotation speed control at pipe end parts rolling is the most acceptable method of pipes incrassate ends length and end shearing decreasing. An actuality of further studies of the elaboration of modified reducing mills speed regimes was noted, aimed at pipes incrassate ends length decreasing depending on their geometry, steels grades, assortment of produced pipes and other technological factors.

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8

Sobolenko, Oleksandr, Petro Drozhzha, Nataliia Dorosh, and Lina Petrechuk. "ACCURACY WALL SICKNESS OF HOT-DEFORMED PIPES STATISTICAL ANALISIS." Modern Problems of Metalurgy, no. 23 (March 27, 2020): 113–20. http://dx.doi.org/10.34185/1991-7848.2020.01.11.

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Pipe-rolling units with an automatic mill are a aggregate production complex that produces hot-rolled pipes of various sizes. The technological process of seamless pipes production, has many stages: flashing the billet into a sleeve, longitudinal rolling in gauge, running in a oblique rolling mill, calibrating and reducing the diameter. Each stage significantly affects the accuracy of the geometric dimensions of the pipes. One of the main parameters characterizing the accuracy of the pipes is their transverse difference namely the size and the nature of the distribution of the pipe wall thickness in the cross section. A significant reserve for saving metal is increasing the accuracy of seamless pipes to avoid different pipe wall thickness. Different pipe wall thickness makes it difficult to get quality pipe screw-thread.The conditions of metal deformation at an injection molding machine with an automatic machine do not exclude the presence of fluctuation of the pipe wall thickness. The best characteristic of the accuracy of finished pipes will be the knowledge of quantitative indicators of the transverse difference of their end sections. The purpose of this work is to determine the variation in wall thickness of hot-rolled casing by means of mathematical statistics methods.The use of statistical data processing methods makes it possible to predict the seamless pipe difference indicator. A statistical analysis of the wall thickness indicator of the end sections showed a high ratio of wall thickness symmetry. An effective way to minimize the symmetric difference component is to optimize the deformation modes along the pipe wall. In this case, a graphical analysis of the distribution of wall thickness showed that the actual difference varies in stochastic dependence. To clarify the general form of the random periodic component of such a dependence, it is advisable to apply methods of harmonic analysis, which will allow us to develop a mathematical model for determining the accuracy of pipes.

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9

Rakhmanov, S. R. "Dynamics of exit section of automatic mill of pipe rolling line." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 2 (February 25, 2021): 175–86. http://dx.doi.org/10.32339/0135-5910-2021-2-175-186.

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Nonuniformity of pipe wall thickness is one of significant indices, determining quality of hot-rolled seamless pipes. One of the reasons of increased nonuniformity arising is dynamics of exit section mechanisms of pipe rolling line (PRL). Results of study of mandrel holding mechanism dynamics of PRL presented. Dynamic models of exit section, accounting parameters of technological process and inertia of a rolled hollow billet elaborated, which enabled to determine the character of dynamic processes at the exit section of PRL automatic mill. Differential equations of exit section elements motion at the exit section of PRL automatic mill were made up. The solution of the differential equations system was obtained in a numerical form by application of Runge‒Kutta method for correspondent dynamic models of exit section based on the example of calculations for ТПА-350 automatic mill. The pattern of dynamic processes arising at the exit section was specified at realization of the whole technological process of a hollow billet rolling at automatic mill, taking into consideration alternative action from the side of deformation center and mass of the rolled hollow billet. It was shown, that the specified solution of the task for three advanced dynamic models of mechanical system considerably differs from those of the known mathematical models. It was established, that the dynamics of the mandrel holding mechanism of ТПА-350 automatic mill equivalently form the mechanism of finished pipes geometry forming. Analysis of dynamic models of the mill exit section enabled to select the necessary technological and dynamic parameters of the mechanical system, to determine stable modes of hollow billets rolling at the ТПА-350 automatic mill. Results of the study of dynamics of exit section ТПА-350 automatic mill presented. A scheme of modernization of the exit section ТПА-350 automatic mill proposed, which enables to realize rational modes of operation accounting level of mechanical system dynamics and to control quality (geometric parameters) of the rolled pipes.

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10

Pasechnik, N. V., N. A. Tselikov, A. I. Grinshpun, G. A. Furlender, and A. V. Chekulaev. "Grooving mill for pipe-heating department." Steel in Translation 37, no. 6 (June 2007): 536–39. http://dx.doi.org/10.3103/s0967091207060150.

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11

Trutnev, N. V., A. V. Krasikov, A. G. Ul’yanov, I. I. Lube, Ya I. Kosmatskii, and A. A. Korsakov. "Mastering of seamless pipes production from martensiticclass stainless steel of 13Cr grade type at the JSC “VTZ” TPA 159–426 pipe mill." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information, no. 12 (December 19, 2018): 68–71. http://dx.doi.org/10.32339/0135-5910-2018-12-68-71.

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Mastering of offshore deposits of hydrocarbons require application of new types of pipe products, capable to effectively work under conditions of constant impact of aggressive media. In this connection new tasks arose to produce seamless hot-deformed pipes made of martensitic class stainless steels with increase chrome content. Mastering of such pipes production is connected with necessity to overcome a series of technological problems. The problems are stipulated by metal structure peculiarities, appeared in low plasticity and narrow temperature range for hot deformation, increased inclination to defects formation in the rolling process, as well as more intensive wear of rolling instrument, in particular of that of piercing mill. Main stages of seamless pipes production mastering, made of type 13Cr steel grades at TPA 159–426 line with TPZ-3 continuous mill of JSC “Volzhsky Pipe Plant” presented. The complex of measures for the noted problems overcoming, including semi-product type selection, piercing mill rolling instrument calibration change, as well as deformation regimes and other measures presented. The elaborated complex of measures allowed providing of pipes manufacturing of necessary quality for PAO “Gasprom” demand as per TU 14-3Р-129–2015 specifications.

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12

Song, Qing Hua, Hua Wei Ju, and Wei Xiao Tang. "Investigation of Temperature Distribution in High-Speed End Mill Assisted by Heat Pipe Cooling." Advanced Materials Research 418-420 (December 2011): 1154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1154.

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A combined numerical and experimental study is performed to analyze the feasibility of using heat pipe cooling in milling applications. In this model, it is assumed that the end mill is subjected to a static heat source which verifies the analysis and feasibility of using heat pipe cooling in milling operations. The performance of heat pipe mill model is approximated using a solid cylinder model of pure conduction. Both the numerical and experimental studies show that the use of a heat pipe in a mill can reduce the temperature field significantly.

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13

Toporov, Vladimir, Alexander Khalezov, and Danis Nukhov. "Evaluation of the Effect of Holding the Mandrel in the Extreme Position of the FQM Mill on the Formation of Surface Defects." Solid State Phenomena 316 (April 2021): 375–79. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.375.

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Modern continuous mills FQM are high-performance technological units that allow you to get products of a wide range. The paper presents the results of the study of the effect of the time of holding the mandrel in the extreme position of the continuous mill FQM (Fine Quality Mill) on the probability of defect formation of surface defects. The problems of сcomputational simulation of the process of continuous rolling of pipes were set and solved. It is established that the increase in the holding time of the mandrel allows to reduce the sliding of the metal on the surface of the tool, and contributes to a stable process of removing the mandrel without the formation of defects on the inner surface of the draft pipe. The results of solving the problems of сcomputational modeling allowed to formulate technical recommendations aimed at reducing the probability of surface defects in the production of pipes at the FQM mill.

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14

Orlov, Grigorii A., and E. A. Kungurov. "Method of Speed Mode Correction of Rolling Pipes in the Reduction Mill." Solid State Phenomena 299 (January 2020): 594–99. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.594.

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The article develops one of the main directions of improving the technology of pipe rolling on a reduction-stretching mill, in order to reduce the end crop. The article describes a speed adjustment technique of the reduction mill, when rolling the front end and back end of pipes, the length of which corresponds to the length of the thickness of ends of the finished pipe. A distinctive feature of the technique is the calculation of volume of the thickness end, which must be reduced by an adjusted value, when rolling the end area in the head stands. The sequence of technological calculations and the results of industrial testing of pipe reduction by standard rolling modes, and modes calculated by the proposed technique, are given. An analysis of the results of industrial testing showed the possibility of reducing the mass of the thickness ends by no less than 7%.

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15

Rakhmanov, S. R. "Study of dynamics of main drive of pilger pipe cold rolling mill." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 6 (June 21, 2021): 689–97. http://dx.doi.org/10.32339/0135-5910-2021-6-689-697.

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Elimination of nonstable deformed state of main drive systems of Pilger pipe cold rolling (PCR) mills with distributed parameters is often stipulated by dynamics stabilization of multi-mass in-line mechanical system. Increase of productivity and optimal conditions of PCR mills loading is reached by dynamic synthesis of base mechanisms. Results of study of force line dynamics of PCR mill with embedded doubled elastic clutch or torsion damper presented. A nonlinear dynamic model of the main force line of a PCR mill with compensating doubled elastic clutch created. A solution of the dynamic synthesis of PCR mill force line task was obtained by nonlinear programming application. To decrease dynamic loads level, an optimal synthesis of the damper system of PCR mill force line was accomplished. A methodology of synthesis of parameters of nonlinear mechanical system with elastic clutch and damper proposed, as a mean to decrease destructive torsion oscillations in the main force line of PCR mill. Harmonic linearization of integral equations of mill main force line motion carried out, recorded by pulse-frequency characteristics. It was established that since the number of equations equals to the number of nonlinear effects of the mechanical system, the task solutions practically does not depend on the degree of freedom of the selected model. It was shown that the results obtained were adequate to the results of experimental studies of mill ХПТ 32 force line.

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16

Ju, Hua Wei, Wei Xiao Tang, Qing Hua Song, and Hong Liang Zhou. "Prediction of Temperature Distribution in High-Speed End Mill Assisted by Heat Pipe Cooling." Advanced Materials Research 311-313 (August 2011): 2371–74. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2371.

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The cutting temperature is a key factor which directly affects thermal distortion, the machined part’s dimensional accuracy, as well as the tool wear in machining process. Aiming to effectively remove the cutting heat yields in machining process, the cutting tool with heat pipe cooling has been developed in recent years. This research focuses on developing a clear understanding of the temperature distribution in end mill embedded with heat pipe. Mathematical model is developed based on the heat transfer theory and the metal-cutting theory. 3-D finite element models are set up. The thermal boundary conditions are properly set, and contrasts of the temperature field in end mill with and without embedded heat pipes by numerical simulations are given.

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17

Balakin, V. F., A. N. Stepanenko, D. Yu Garmashev, A. F. Grinev та Yu D. Ugryumov. "Modernization of the pipe mill with Pilger millTPA 5-12ʺ: tasks, methods, ways of implementation". Metallurgicheskaya i gornorudnaya promyshlennost, №6, 2018, № 6 (2018): 36–42. http://dx.doi.org/10.33101/s0659485765.

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Purpose. Based on the analysis of the current state of production of pipes at the Pilger plant 5-12, PJSC Interpipe NTZ proposed new technological solutions for its modernization to expand the size and brand range of pipes produced, reduce metal consumption by improving the accuracy of pipes, ensuring energy savings by reducing natural gas and others Methodology. Selection of representative data of pipe production processes on Pilger installations operated in Ukraine and abroad from scientific and patent sources. Solving problems on the choice of optimal resource and energy-saving technological schemes for the production of pipes at TPA 5-12ʺ PJSC Interpipe NTZ at the expense of new technological schemes and equipment modernization. Findings. The article presents the results of the analysis of the state of production of pipes for injection molding machines with pilgrim mills in the modern conditions of globalization of the world economy, which requires the modernization and reconstruction of these injection molding machines to ensure competitiveness on the world market. New technological and technical solutions for the modernization of TPA 5-12, PJSC Interpipe NTZ, have been developed to expand the range and increase the diameter of the pipes to 465 mm or more from carbon, alloyed and hard-to-deform steel grades. Originality. Expanded ideas about the formation of a thin-wall with the firmware NLZ in the glass on a horizontal hydraulic press 20MN and when rolling the glass on the mill-elongator. The mechanism of formation and correction of the different wall thickness in the system of the piercing press – mill-elongator is specified and the ways of reducing the wall thickness of the sleeves and pipes are outlined. Practical value. The new technological and technical solutions developed in the article can be used for the modernization and reconstruction of Pilger plants, including TPA 5-12ʺ PJSC Interpipe NTZ, which will increase their competitiveness by expanding the size and grade of pipes, reduce metal consumption, by increasing the accuracy and reducing waste, and also provide energy savings by reducing the consumption of natural gas for heating the roll for some pipe mix. Keywords: pipe, liner, piercing press, millelongator, pilgrim installation, varnished, energy-saving, modernization, descaling.

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18

Rakhmanov, S. R. "SOME FEATURES OF MILLS OPERATION COLD PILER PIPE ROLLING." Metallurgicheskaya i gornorudnaya promyshlennost, №6, 2018, no. 6 (2018): 30–35. http://dx.doi.org/10.33101/s064346875.

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Purpose. The establishment of the essence of many dynamic phenomena and the prediction of peak loads, both during the design or reconstruction stages of HPT mills and their operation using advanced calculation methods remain relevant. Methodology. An engineering technique to simplify a developed dynamic model is proposed, which includes the combination and development of known techniques. In addition, active mechanical connections in the original dynamic model of an HPT mill are identified, causing the pronounced parametric processes in the system under study. Findings. The study of the dynamics of simplified two-mass models of the HPT mill with combined parameters and periodically changing mass characteristics has been carried out. A differential equation of parametric oscillations in the drive power line has been compiled. The solution to the differential equation allows us to estimate the dynamic displacements of the considered drive of the working stand of the HPT mill for the most common modes of vibration of the mechanical system. Since the differential equations (8) are present in the formulation of the basic Cauchy problem, we implement the solution numerically, using the Runge - Kut method in the medium of a standard software product, for the most common first form of oscillations of a mechanical system. Originality. Dynamic features of the operation of the drive of the working stand of the HPT mill are presented in the form of angular displacements of the drive shaft of the mechanical system. The dynamics of the drive drive of the working stand of the HPT, 32-3 mill are calculated (pipe rolling along the route 38×3.8 → 19.1×2.1, material – steel Х18Н10Т). Practical value. The causes of the appearance of parametric oscillations in the drive system are identified and dynamic instability zones of the mechanical drive system of the HPT mill is installed, which allows for the selection of optimal rolling conditions at the design stage of technological processes. Keywords: cold rolling, pipe, mill, power line, main drive, dynamic model, simplified design scheme, mathematical model, parametric oscillations, differential equation, angular oscillations, dynamic instability.

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19

Belyaev, S. Yu, A. A. Fedulov, Yu M. Chernyshev, V. I. Kuznetsov, and M. Yu Bulganina. "Experimental Study of Features of Thin-Walled Pipes Sizing in the Line of a Pipe Rolling Plant with an Automatic Mill." MATEC Web of Conferences 346 (2021): 01032. http://dx.doi.org/10.1051/matecconf/202134601032.

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The aim of the study is to establish the actual level of working loads on the roll drive line of the sizing mill installed as part of the PRP-220 with an automatic mill, when switching to the production of steel pipes from increased strength group. The study is based on a complex experimental and theoretical analysis. After the processing of the results of experimental studies a comparison of the most loaded sizing route for a thin-walled pipe with a diameter of 244.5 mm and a wall thickness of 8.9 mm (D/S = 27.5) made of steel of strength group “D” was made with the route for a pipe with a diameter of 177.8 mm and a wall thickness of 9.2 mm (D/S = 19.3) from steel of strength group “E”. Graphs of the observed processes are presented, as well as calculated predictive values of sizing of thin-walled pipes for steel of strength group “E”, obtained on the basis of an experimental-theoretical analysis of the growth of flow stress. Recommendations have been given for improving the equipment of the PRP-220 sizing mill for the production of pipes with increased diameters from steels of increased strength groups.

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20

Marchenko, L. G. "Optimizing pipe deformation in a reduction mill." Steel in Translation 38, no. 12 (December 2008): 1044–47. http://dx.doi.org/10.3103/s0967091208120243.

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21

Vacance, M., E. Massoni, J. L. Chenot, Rovelli, Cumino, and Lubrano. "Multi stand pipe mill finite element model." Journal of Materials Processing Technology 24 (December 1990): 421–30. http://dx.doi.org/10.1016/0924-0136(90)90203-7.

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22

Aleshchenko, A. S., A. S. Budnikov, and E. A. Kharitonov. "METAL FORMING DURING PIPES REDUCTION ON A THREE-HIGH ROLLING MILL." Izvestiya. Ferrous Metallurgy 62, no. 10 (November 3, 2019): 756–62. http://dx.doi.org/10.17073/0368-0797-2019-10-756-762.

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Pipe rolling plants (PRP) with three-high screw rolling mills are used to produce hot-rolled seamless pipes. In Russia, two such rolling units are used: PRP 160 at Pervouralsk Novotrubny Plant and PRP 200 at Volzhsky Pipe Plant. Recently, the most acute issue is increasing their technological capabilities. There is a need of expanding size and grade mix, as well as non-traditional use of gauge and rolling mill for screw rolling. The paper presents results of experimental study of the process of reduction or un-adjusting rolling of pipes on three-high screw rolling mills with an increase in reduction of diameter up to 25 %. The results of computer finite element modeling in QFORM program are provided. The aim of this work was to study effect of rolling process with increased reduction in diameter on change of metal form in deformation zone and changes in geometrical dimensions at reduction of cups with different wall thickness on the pilot mill. Important role in process of metal forming during screw rolling (especially when rolling hollow products and pipes) plays cupped blank ovality that is equal to the ratio of the roll radius when the metal comes in contact with the roller to the radius under the roller in the cross section of deformation zone. Ovality characterizes stability of change in geometric dimensions of pipes and their resistance to deformation in inter-roll space. The reduction of thin-wall cupped blank is accompanied by large va lues of ovality, deformation process is less stable, and as a result, form defects (faceting) and end defects occur during plug rolling. Ovality at plug rolling increases more intensely in comparison with plugless rolling. Presence of plug limits displacement of metal in axial direction and contributes to displacement of metal in gaps between rollers. At plugged rolling, it is necessary to use rolls with collars allowing main reduction along the wall, thereby localizing reduction zone on the plug, and reducing ovality of cupped blanks.

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23

Zhang, Dazhi, Mingsheng Guan, Qingdong Zhang, Aiguo Wang, and Xinliang Zhou. "Simulation study on steel pipe deformation behavior in retained mandrel pipe mill." Journal of Physics: Conference Series 1633 (September 2020): 012163. http://dx.doi.org/10.1088/1742-6596/1633/1/012163.

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24

Zgura, A. A., E. M. Krichevskii, V. A. Rudenko, A. V. Lysyak, and V. A. Kumanev. "Heat-treatment with induction heating of pipes within the pipe welding mill." Metal Science and Heat Treatment 29, no. 8 (August 1987): 588–91. http://dx.doi.org/10.1007/bf00763112.

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25

Zhao, Yang, Qiang Ren, Tian Xia Zou, Da Yong Li, and Ying Hong Peng. "Analysis and Simulation of the UOE Pipe Production Processing by Finite Element Method." Materials Science Forum 749 (March 2013): 437–43. http://dx.doi.org/10.4028/www.scientific.net/msf.749.437.

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Анотація:

Large-diameter pipes used in offshore applications are commonly manufactured through the UOE process. The plate is crimped along its edges, formed into a U-shape and then pressed into an O-shape between two semicircular dies. The pipe is welded closed and then circumferentially expanded to obtain a highly circular shape. In this study, the two-dimensional finite element model of the whole processing of the UOE pipe production has been established, including large deformation and complex contact. The deformed geometries of different steps and distribution of the equivalent plastic strain and variation in load are analyzed. This research is helpful in UOE forming process design and evaluating the capability of the pipe mill.

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26

Kruzel, Robert. "Conical Round Tubes - Preliminary Tests for Use on Lighting Columns." Materials Science Forum 972 (October 2019): 141–47. http://dx.doi.org/10.4028/www.scientific.net/msf.972.141.

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Conical pipes belong to a group of economical profiles, which find broad application in various metal products. Until now the conical pipes are manufactured by following methods: rolling on two-high mill in impressions with varying depth on the rolls perimeter; forging in lever swaging machine, formation in combined process of drawing and rolling, and rolling on skew rolling mill. Manufacturing of conical pipes belong to complicated engineering processes, and used until now methods do not allow to meet demand for conical pipes – especially the long ones with large crosswise dimensions, e.g. pipes for lamp posts. This situation makes it reasonable to look for new processes with wider engineering possibilities when compared with till now known methods. It seems that the process of conical pipe envelope formation will allow to wide conical pipes assortment.

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27

An, Ning, and Liu Hai. "Finite Element Analysis of Rolling Process for Pilger Mill." Advanced Materials Research 881-883 (January 2014): 1420–23. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1420.

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For the simulation of cold rolled 20Cr steel pipe rolling process the DEFORM-3D being used, the simulation results include the equivalent stress, equivalent strain and rolling force distribution in deformation zone. The stress state of the pipe reducer section is analyzed, analysis shows that the simulation result is approximate the theoretical calculation. The simulation result shows the roll pass and openning effect on the rolling pipe. A view put forward is to compare the simulation results with the actual production and find out their differences. A proposal is made to establish a corresponding database based on simulation and production data.

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28

Семикопенко, Igor Semikopenko, Воронов, Vitaliy Voronov, Вялых, and Sergey Vyalykh. "TO THE QUESTION ABOUT THE PERFORMANCE OF THE DISINTEGRATOR WITH A VERTICAL LOAD OF MATERIAL." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 1, no. 12 (November 11, 2016): 111–13. http://dx.doi.org/10.12737/22645.

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In this article, analytical expression is presented. This expression can determine the productivity of the cage mill with vertical material leading. It considered the expiration of the material from the capital pipe and its path through the vertical loading pipe. Presented a calculation scheme for determine the productivity of the cage mill with vertical material loading

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29

Pavlov, Dmitry A., Aleksandr Bogatov, and E. A. Pavlova. "The Investigation of Pipe Ends Formation under Reduction Mill Rolling." Solid State Phenomena 284 (October 2018): 557–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.557.

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The paper presents the results of the experimental study of the longitudinal and transverse wall thickness variation at the ends of a oil-well tubing during reduction procedure. It is established that the greatest "contribution" to wall thickness data spread is made by the pipe facets, which is caused by the influence of the reduction regimes and the rolls calibration due to the metal flow into the tapers of groove. In the course of work, recommendations were also made that, in order to reduce the wall thickness variation of pipes, it is necessary to develop the calibration ensuring the decreasing of the intensity of metal flow into the tapers of groove, as well as decrease the reduction at the mill stands, and increase the coefficient of kinematic tension between the stands of the stretch-reducing mill.

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30

Samusev, S. V., A. V. Kondrushin, and V. A. Fadeev. "Deformation at continuous forming of longitudinal welded pipes." Izvestiya. Ferrous Metallurgy 64, no. 1 (February 16, 2021): 21–27. http://dx.doi.org/10.17073/0368-0797-2021-1-21-27.

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One of the effective methods for studying any process is its physical modeling, during which it is possible to verify the concepts and hypothesis obtained previously by theoretical modeling. In the laboratory of metal forming of NUST “MISIS” there is ERW mill 30 – 50 for the production and simulation of processes for the continuous forming of longitudinal welded pipes of small and medium diameter, their welding and calibration. This article discusses the deformation zone of a pipe billet, using the first two stands of a molding mill as an example with a calibration of a roll tool for a pipe diam. 50×1.5 mm. Based on the analysis of methods for calculating the parameters of real roll calibers, a model of contact interaction of the pipe billet with the first and second roll open stands was developed and areas of the deformation zone were determined including their sizes: non-intensive and intense impact; input and output contact zones; springing up. Analyzing the conditions of contact interaction of the pipe billet with roll calibers, parameters of the pipe billet in contact with the first-caliber rolls were determined in seven sections, taking into account the features of continuous forming. An analysis of the results has shown that the maximum longitudinal deformation occurred at the edge of the billet in section B – B and was equal to 1.04 %, and for the pipe billet bottom it was 0.92 %. For the experiment, a grid was applied to the pipe billet using a laser engraver. During forming, the trajectory deviation of the pipe billet bottom from horizontal axis was recorded, and sizes of the forming sections were determined. Comparison of theoretical and experimental values has shown that the discrepancy between them does not exceed 7 %.

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31

Samusev, S. V., and V. A. Fadeev. "Modeling of longitudinal welded pipe forming in open rolling pass unit of electric weld pipe mill." Izvestiya. Ferrous Metallurgy 62, no. 7 (August 22, 2019): 531–38. http://dx.doi.org/10.17073/0368-0797-2019-7-531-538.

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The results of theoretical and physical modeling of pipes forming process are described. Experiments on strip billets forming were carried out on 10-50 pipe-welding mill for a pipe 50 mm in diameter with 1mm wall. Forming of pipe billets was carried out at unit of forming horizontal and vertical stands with estimation of geometrical parameters. Roll drafting is one-radial. Energy-power parameters of the process that affect quality of billet geometry were determined and measured. Analysis of geometric parameters of resulting billet has revealed defects of buckling type on the billet’s right edge between the second edger and the third molding stand. Similar defect was detected at the left edge of the billet at a distance of the third molding and edger stands. To eliminate defects in forming section, shaping stands were rebuilt so that forces on drive cells were identical. Energy-force parameters of the process were sequentially determined: pulling forces of drive stands, resistance to strip movement and vertical molding forces. Calculations for determining energy-force parameters were performed taking into account the main technical parameters using two methods. The first technique takes into account geometric parameters of molded billet and parameters of working zone with the zone of non-contact deformation. The second method is based on consideration of contact interaction between the billet and shaped instrument along the deformation section. Discrepancy between calculated and experimental data was 8 – 12 %. After adjusting technical parameters of the molding process and the passes re-adjusting, a defect-free pipe billet was formed. Comparative analysis of calculated and experimental edge trajectories along the height and width of the cages showed discrepancy in results in range of 6 – 9 %. While studying geometric parameters of the focus of deformation, contact and non-contact zones of working zone and area of sprinkling were taken into account. Parameters of the pipe billet shaping in monotonous and roll forming centers have been calculated. Analysis of the results has shown that change in billet’s geometry in shaping stand corresponds to the accepted statements of billet’s geometry changes in rolling pass.

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32

Rakhmanov, S. R. "VIBRATION PIERCING OF PIPE BILLET ON THE PIERCING PRESS OF PIPE-ROLLING MILL." Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 61, no. 2 (March 6, 2018): 156–63. http://dx.doi.org/10.17073/0368-0797-2018-2-156-163.

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33

Orlov, Grigorii A., and A. G. Orlov. "The Calculating Method of Thinning Pipes Ends before Rolling in the Reduction Mill." Solid State Phenomena 299 (January 2020): 693–98. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.693.

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In this article it is discussed one of the main directions of improving the rolling tubes technology on a pipe-rolling plant with a continuous mill, in order to reduce the pipe-ends cut. A method for preliminary end sections thinning modes, calculating during rolling on a continuous mill, to compensate for wall subsequent thickening in the reduction mill, has been developed. Method distinctive feature is the calculation of end thickening volume, which must be reduced by a specified quantity when end sections rolled. The sequence of technological calculations is given. The results of pipe reduction computer simulation by regular rolling modes, and modes calculated by the proposed method, are represented The analysis of the simulation results showed the possibility of thickened ends length reducing of at least 10%.

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34

Rakhmanov, S. R. "Dynamics control in pipe cold rolling mill main drive." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 3 (June 27, 2019): 355–64. http://dx.doi.org/10.32339/0135-5910-2019-3-355-364.

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Elimination of unstable and critical states of deformed systems of pipes pilger cold rolling mill, heavy-loaded equipment of which functions under conditionsof increase dynamic loads, is mainly intended for mechanic system dynamics stabilization until the accepted level of loading. Active mechanicties in the initial dynamic model revealed, which stipulate the demonstration of pronounced parametric processes in the studied system of pipes cold rolling mill main driver. Analysis of reasons of parametric oscillations originating carried out for systems of pipes cold rolling mill main driver. Zones of dynamic instability of mechanic system functioning according to Eins–Strett diagram determined, that enable to make the choice of passive optimal rolling regimes at the stage of technological processes designing of pipes pilger cold rolling.A system of active control by main driver of pipes cold rolling mill elaborated based on its mathematical model. A structure of optimal control by angular oscillations driver line elements of pipes cold rolling mill selected and parameters ofactive control impacts of the automated servo control system determined. A mechanism of optimal control by dynamic state ofdriver line elements of pipes cold rolling mill proposed. Also proposed an outline of critical and instablestates elimination for the main driver line driver of pipes cold rolling mill, which is realized by means of adaptive active automated servo control facility. The modernized main driver line of pipes cold rolling mill is equipped by facilities and control systems, enabling to switch the initial mechanic system from a critical state into a zone ofdesired states in a servo regime. Sensors of threshold moments level of elasticity forcesare installed on the drive shaft of main driver of pipes cold rolling mill. During the drive shaft angular elastic oscillations, comprising of actual and desired parameters of mechanicsystem is made based on sensors signals. Next, a correspondent control impact is formed based on algorithm embedded into the electric drive servo control system. When the displayed point of the drive shaft reaches the desired area of system dynamic stability, the active drive control is switched off. If further the disturbing load, applied from the side of deformation seat, makes the drive line dynamic characteristics off the desired status, then the dynamic system control process is repeated in anautomated mode. Reliability of the results received confirmed by calculation example and experiments at the main driver of pipes cold rolling mill ХПТ-32.

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35

Borovik, A. A. "Multiengine electric drive of pipe cold-rolling mill." Russian Electrical Engineering 81, no. 3 (March 2010): 126–30. http://dx.doi.org/10.3103/s1068371210030041.

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36

Maksimov, E. A. "Sizing skelp in a continuous pipe-welding mill." Metallurgist 53, no. 7-8 (July 2009): 429–33. http://dx.doi.org/10.1007/s11015-009-9201-9.

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37

Nguyen, Quang, and Alexander Sergeevich Aleshchenko. "FEM-Based Comparison of Mandrel Wear Resulting from Elongation of Pipes Manufactured from Various Materials on a Two-Roll Screw Rolling Mill." Materials Science Forum 1049 (January 11, 2022): 96–101. http://dx.doi.org/10.4028/www.scientific.net/msf.1049.96.

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The present article discusses the cylindrical mandrel wear change during rolling using MISIS - 130 D mill depending on the type of rolled billets materials used. The research on the mandrel wear of the screw rolling mill during pipes elongation was carried out using the finite element method (FEM). The results of the wear modeling showed that the depth of the metal removed on the mandrel surface during stainless steel pipes elongation was higher as compared to alloyed and carbon steel pipes. The significant wear of the mandrel during stainless steel pipe rolling can be explained by the rise in the applied metal force resulting from the introduction of alloying components such as chromium and nickel into rolled billets materials. Consequently, the obtained modeling results can allow predicting the service life of working tools.

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38

Korovin, V. S., A. N. Shashkov, O. I. Kom, A. G. Scheglov, S. V. Avdeev, Yu L. Gerasimov, and Yu L. Bobarikin. "IMPROVEMENT OF CALIBRATION OF CONE-SHAPED ROLLS OF THE PIERCING MILL OF THE PIPE-ROLLING SHOP." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 2 (July 4, 2017): 46–50. http://dx.doi.org/10.21122/1683-6065-2017-2-46-50.

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The increase in operational durability of the technological tools of the piercing mill in the pipe-rolling shop and decrease in deficiency of produced pipes due to improvement of calibration of cone-shaped rolls is considered in the article. Increase in durability the piercing mandrels is evaluated as 1,3–4,3 times when using calibration of cone-shaped rolls with a smaller corner of an output cone. Improvement of quality of external surface of produced pipes was made due to application of experimental ring calibration of rolls. It is shown that this calibration demands big expenses of energy at the piercing.

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39

Rakhmanov, S. R., and V. L. Topolov. "Dynamics of drive line in helical pipe-rolling mill." Steel in Translation 41, no. 10 (October 2011): 859–64. http://dx.doi.org/10.3103/s0967091211100184.

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40

Kharitonov, E. A., V. P. Romanenko, and A. S. Budnikov. "Pipe behavior in a three-roller screw-rolling mill." Steel in Translation 44, no. 10 (October 2014): 769–72. http://dx.doi.org/10.3103/s0967091214100064.

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41

Chernyshev, Yu M., A. V. Bolotov, V. P. Starogorodtsev, A. R. Shamilov, and Yu B. Chechulin. "Improving Pipe Production on the TPA 220 Piercing Mill." Steel in Translation 48, no. 1 (January 2018): 55–58. http://dx.doi.org/10.3103/s0967091218010047.

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42

Khadeev, Grigorii, Dmitrii Ringinen, and Leonid Efron. "Effect of Multistage Deformation during the Pipe Processing on Mechanical Properties of Steels Strength Grade X70-X80." Key Engineering Materials 716 (October 2016): 957–62. http://dx.doi.org/10.4028/www.scientific.net/kem.716.957.

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In this research effect of the pipe forming on strength properties of rolled metal was investigated. Deformed state of metal during pipe processing was analyzed and tests with specimens from plate were performed. Analysis of the experimental data was exploited to evaluate effect of the strain on yield stress in each stage of the pipe forming and specimen flattening. The model for estimation of mechanical properties of the rolling mill product based on the required mechanical properties of the pipe was created.

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43

Tovsteleva, A. I. "Technical and economic advantages of using elongating mandrel made of forged blank when rolling on a continuous mill with a controlled‑movable mandrel." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (December 20, 2021): 55–58. http://dx.doi.org/10.21122/1683-6065-2021-4-55-58.

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In the article, the current problem of reducing the cost of pipe‑rolling products, which is especially acute in the world market of metal products high competition conditions is considered. A significant share in the cost of pipe products stands at the cost of rolling tools. Reducing the cost of buying a deforming tool allows you to make considerable savings in the seamless pipes’ production. The article presents: analysis of the economic efficiency of manufacturing long cylindrical mandrels from a semi‑finished product – forged billet at OJSC «BSW – management company of «BMC» holding»; development of the technological process for the production of long mandrels depending on the required size; the results on the manufacture of long cylindrical mandrels from forged billet at OJSC «BSW – management company of «BMC» holding», as well as their industrial tests in the conditions of the pipe rolling shop. A positive result of using long mandrels of the PQF mill made of forged blanks was obtained.

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44

Rakhmanov, S. R., та V. V. Povorotnii. "Study of the dynamics of ТПА 350 automatic mill working stand elements". Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 76, № 8 (3 вересня 2020): 830–40. http://dx.doi.org/10.32339/0135-5910-2020-8-830-840.

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Анотація:

To form a necessary geometry of a hollow billet to be rolled at a pipe rolling line, stable dynamics of the base equipment of the automatic mill working stand has a practical meaning. Among the forces, acting on its parts and elements, significant by value short-time dynamic loads are the least studied phenomena. These dynamic loads arise during transient interaction of the hollow billet, rollers, mandrel and other mill parts at the forced grip of the hollow billet. Basing of the calculation scheme and dynamic model of the mechanical system of the ТПА 350 automatic mill working stand was accomplished. A mathematical model of dynamics of the system “hollow billet (pipe) – working stand” within accepted calculation scheme and dynamic model of the mechanical system elaborated. Influence of technological load of the rolled hollow billet variation in time was accounted, as well as variation of the mechanical system mass, and rigidity of the ТПА 350 automatic mill working stand. Differential equations of oscillation movement for four-mass model of forked sub-systems of the automatic mill working stand were made up, results of their digital calculation quoted. Dynamic displacement of the stand elements in the inter-roller gap obtained, which enabled to estimate the results of amplitude and frequency characteristics of the branches of the mill rollers setting. It was defined by calculation, that the maximum amplitude of the forced oscillations of elements of the ТПА 350 automatic mill working stand within the inter-roller gap does not exceed 2 mm. It is much higher than the accepted value of adjusting parameters of the deformation center of the ТПА 350 automatic mill. A scheme of comprehensive modernization of the rollers setting in the ТПА 350 automatic mill working stand was proposed. It was shown, that increase of rigidity of rollers setting in the ТПА 350 automatic mill working stand enables to stabilize the amplitude of forced oscillations of the working stand elements within the inter-rollers gap and considerably decrease the induced nonuniform hollow billet wall thickness and increase quality of the rolled pipes at ТПА 350.

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45

Belykh, I. A., and M. A. Grigorev. "The Pipe Rotation Electric Drive of a Cold Rolling Mill at JSC Chelyabinsk Pipe Plant." Russian Electrical Engineering 90, no. 5 (May 2019): 370–74. http://dx.doi.org/10.3103/s106837121905002x.

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46

Lukiyanto, Y. B. "A Couple of Savonius Wind Mill and Centrifugal Reaction Pump as a Wind Energy Water Pump System." Applied Mechanics and Materials 836 (June 2016): 299–303. http://dx.doi.org/10.4028/www.scientific.net/amm.836.299.

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Анотація:

Wind energy is one of renewable energy which became the center of attention and grew rapidly. Especially for remote area, wind energy is one of alternative dependable energy sources which can be used for water lifting. Savonius wind mill can be a solution for decentralized power generation, with low cost and reduced environmental impacts. This study observed a couple of Savonius wind mill and a centrifugal reaction pump which used as a wind energy water pump system (WEWPS). The Savonius wind mill has 0.8 m diameter, 1.0 m height, 2 stages, 2 buckets in every stage and 0.1 m width of the buckets spacing. The centrifugal reaction pump with a T-junction has 0.9 m diameter, 18.5 mm (0.5 inch) nominal inner diameter for both vertical and horizontal pipes. Both arms of T-junction have similar dimension and functioned as impeller. The pump, which is suitable for low shaft speed, is modified by replacing the couple of fixed orifices and sliding orifice with double U pipe configuration to restrict the air entering the pipe channel, either while stopped or rotated. The transmission used to connect the shafts of both devices is the couple of belt and pulleys with transmission ratio 7:4. WEWPS started pumping the water at 4.5 m/s wind speed and total head 1.5 m. The wind speed produced low shaft speed 120 rpm, shaft power 13 Watt and through the transmission driving the pump into cut-on mode.

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47

Korsakov, A. A., D. V. Mikhalkin, N. A. Zavartsev, A. V. Krasikov, I. N. Tyshchuk, A. G. Ul’yanov, and V. V. Baikov. "Elaboration of a mathematical model and a computer program for calculation of energy-power parameters of reduction process of continuously casted billets at three-roll screw mills." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 1 (January 19, 2021): 55–62. http://dx.doi.org/10.32339/0135-5910-2021-1-55-62.

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Анотація:

For production seamless hot-rolled pipes, round continuously casted billets (CCB) are used, the diameter of which is restricted by the limit sizes of CCM moulds. The expansion of billets assortment necessary to provide pipe-rolling lines (PRL) by required diameters is possible through preliminary reduction of CCB, which is made mainly at three-roll screw-rolling mills having powerful drives. If a plant has no such mills, billets reduction can be accomplished at existing three-roll Assel’s mills being comprised by various PRLs. However, the possibilities of such mills are restricted by acceptable current loads for their drives, since they are designed to roll out pierced pipe stock, but not to reduce solid billet. To determine energy-power parameters of the process of pipe billet reduction at three-roll Assel’s mills, a mathematical model was elaborated accounting geometric, temperature, kinematic and deformation peculiarities by determination the volume of accumulated metal at each roll before rolling out, section of forming diameter of reduced pipe billet and temperature variation during the reduction. As a result, the software product “Reduction Motor Load 2020” (RML2020) was elaborated, which includes a computing kernel based on the elaborated mathematical model for determining the power parameters of the reduction process and a module for analyzing the initial data with a system of boundary conditions. The interface of the software product allows displaying the results of calculations and analysis both in numerical form and in the form of graphs. The elaborated software product contains a database of the main steel grades and allows calculating the current loads on the Assel’s mill drives during the reduction of billets made of various steel grades. The software allows also to accomplish analysis of the acceptable values of various initial parameters (diameters of the initial and reduced billets, temperature of the initial billet, feed angle and rotation frequency of rolls) to ensure the operation of the mills in the acceptable range of current loads. There is also a possibility of making a report in the form of an Excel document and collecting statistical data on the actual values of current loads. By application the RML2020 program, acceptable reduction modes of a pipe billet made of 15Х13Н2 steel (AISI 414) with a diameter of 156 mm into a billet with a diameter of 120 mm were calculated for screw Assel’s mills of PTL-1 of JSC VTZ.

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48

Yang, Cheng, Fei Wang, and Guo Wei Wang. "Using Ring Stiffness to Calculate the Elastic Modulus of Steel-Plastic Composite Pre-Insulated Pipe." Advanced Materials Research 581-582 (October 2012): 602–5. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.602.

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Elastic modulus of the pipe mill is one of the most important figures, which decides the character of the mechanics of materials. It is usually gained by experiments or finite element analysis. Combining computing formula of ring stiffness of buried pipeline and test results of ring stiffness of new straight buried thermal pipe (steel-plastic composite pre-insulated pipe), this article uses moment of inertia and equivalent section method to calculate elastic modulus of this pipe catalogue. By comparing with practical test results, the article testifies that this method could be probably used in directly buried installation.

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49

Pilipenko, S. V. "Analysis of the influence of cold pipe rolling technological factors on the change in Q-factor distribution along the deformation cone." Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy, no. 3 (June 19, 2019): 30–35. http://dx.doi.org/10.17073/0021-3438-2019-3-30-35.

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Анотація:

The paper provides the results of studying the effect of technological factors of the cold pipe rolling process on the changingof Q-factor distribution along the deformation cone. The Q-factor value, which is the relationship between actual deformation on the wall thickness and actual deformation on the pipe mean diameter, and the pattern of its distribution along the deformation cone are controlledvalues when rolling pipes from titanium and zirconium alloys of a certain range. The Q-factor defines whether metal grains will be oriented radially or tangentially. It is desirable that Q-factor f luctuate around its definite value with low amplitude along the entire deformation cone. It is determined that the method used to calculate the pipe wall thickness distribution along the deformation cone has a significant effect on the change in the Q-factor distribution along the deformation cone. The advantages of using mandrels with a curvilinear generatrix of the working surface profile are confirmed. Dependences ascertained in the article can be used to calculate the schedules of rolling and calibration of cold pilgering mill tools.

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Tsarev, N. S., E. M. Тат’yannikova, and V. V. Mozgovoy. "Sludge conditioning after pipe-rolling mill aggressive sewage waters neutralization." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 12 (December 27, 2019): 1392–96. http://dx.doi.org/10.32339/0135-5910-2019-12-1392-1396.

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