Zeitschriftenartikel: „Lathe spindle“

1

Huang, Qiang, and Kun Wei. "Modeling and Analysis on the Rotation Accuracy of Lathe Spindle." Advanced Materials Research 602-604 (December 2012): 1757–60. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1757.

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The rotation accuracy of the machine spindle is an important accuracy index, and has numerous influence factors. According to the structure characteristic of the spindle system, an integrated model of the spindle rotation error is established in this paper. By this model, the impact law and cumulative effect of various error sources on spindle rotation accuracy can be analyzed. Taking the lathe spindles as an example, the modeling and analysis method for spindle error are introduced. Visualization of spindle center track is achieved by programming.

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2

Yang, Jian Xi, M. Yang, F. K. Cui, and Hong Yu Xu. "Analysis of Modality of CK61125 CNC Lathe Spindle Box." Key Engineering Materials 455 (December 2010): 23–27. http://dx.doi.org/10.4028/www.scientific.net/kem.455.23.

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CNC lathe spindle box is a key component of the CNC lathe system, and its dynamic characteristics are the main factor affecting the machining accuracy and processing efficiency of machine tools. In this paper, CK61125 CNC lathe spindle box model was established by simplifying its structure. Then modal analysis of the spindle box was done and extended to 6-order modes with the platform of co-simulation environment in ANSYS Workbench, and the natural frequencies and vibration modes for lathe spindle box were obtained. The weak links in the spindle box were found, and the improvement schemes are proposed. Finally the lathe spindle box was improved, the modal analysis of the spindle box was made again, and the results showed that the lathe spindle box dynamic performance was improved. All of these results are beneficial for optimization and re-design of the lathe spindle box so that it has better dynamic performance.

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3

Ma, Ping, Biao Zhou, and Hai Peng Li. "Finite Element Analysis on Thermal Characteristics of Lathe Motorized Spindle." Advanced Materials Research 311-313 (August 2011): 2434–39. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2434.

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Abstract．High-speed motorized spindle is a promising technology widely used in high speed machining．The lathe motorized spindle is the key component of the high speed NC lathe and the thermal characteristics of the lathe motorized spindle is one of the major factors influencing the performance of the machine tools．In order to improve the accuracy and reliability of the high speed NC lathe，the thermal characteristic of the high speed NC motorized spindle has been studied in this paper．Firstly，the structure feature of the spindle has been introduced and two major internal heat sources of motorized spindle have been investigated．Secondly，the heat transfer coefficients of the major components of the lathe spindle have been conducted．Then，the 2D temperature field model has been developed with finite element method．Based on it, the temperature field and temperature rises of the spindle have been simulated and the reasonability of temperature distribution of the spindle unit has also been discussed．The research results provide the reference to evaluate of the thermal behavior of the high speed NC motorized spindle．

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4

Wang, Jun Feng, Xian Feng Du, Qing Ming Hu, and Shi Gang Wang. "System Design of Spindle on High-Precise CNC." Applied Mechanics and Materials 151 (January 2012): 463–68. http://dx.doi.org/10.4028/www.scientific.net/amm.151.463.

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With the rapid development of science and technology, Lathe will be sure to develop in the direction of high speed, high precision and high stability as the most basic and important production equipment in industry. The spindle is the one of important component in the lathe, of which static and dynamic characteristics is directly related to the machining precision and machining stability, and the performance of spindle system directly affects the overall machine specifications. Through the analysis of the characteristics of spindle, the ways and means of the spindle analysis are studied. For the requirements of static and dynamic characteristics analysis in the process of spindle design on high-precise CNC lathes hydrostatic, direct-drive spindle motor mode is used. Three-supporting structure is adapted in the layout of spindle bearing in order to improve the accuracy and stability of the spindle drive. The rolling bearing is used in auxiliary support, the front and rear radial bearing is used in master hydrostatic bearing. Thrust bearings are located on both sides of the former type of radial bearing to complete the selection of the spindle material and the design of the structural primary dimensions. It is meaningful to improve the specifications of CNC lathes, guide the design, generation and modification of the high precise CNC lathe and enhance static dynamic characteristics of the spindle and improve accuracy and stability of the machine tool processing.

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Бренгауз, Александр, Aleksandr Brengauz, Александр Молчанов, et al. "MODAL VIBRATION DIAGNOSTICS OF LATHES DESIGNS." Bulletin of Bryansk state technical university 2016, no. 3 (2016): 184–90. http://dx.doi.org/10.12737/22079.

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In the paper the problem of reasons elucidation in the matter of lathe instability at groove cross turning and boring is solved. As a tool for the analysis of a structure state there are used potentialities of modal monitoring, and in particular, a correlation of modal parameters, sets of proper characteristics of an elastic system (self-frequencies, modal coefficients damping and own forms of vibrations) of lathes designs with the state of bearings in spindle units. The application of a modal approach to the evaluation of a lathe design state or an elastic system is a new section in a dynamic analysis and may be called modal diagnostics. From the analysis of the modal parameter values of a lathe one traces their tie with the lathe design characteristics, and in particular, with the existence of sever rigidity anisotropy of a spindle unit front bearing and also with its insufficient tightness. Reasoning from the information mentioned of the modal parameters connection with the rigidity of a spindle unit front bearing and a state of bearing design the authors draw a conclusion of the technological state of a spindle unit design. In such a way, by the example of the design of two lathes in the paper there is shown a possibility of transition from experimental frequency characteristics through a procedure of modal diagnostics to the evaluation of the technological state of a spindle unit.

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6

Li, Xiao Mei, Hua Jiang Sun, and Li Hui Zhu. "Virtual Assembly of Lathe Spindle System." Applied Mechanics and Materials 37-38 (November 2010): 1625–28. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1625.

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On the basis of research on the assembly process of CA6140-type lathe spindle system, the assembly relationship of its components was ascertained. Three-dimensional (3D) components storehouse of the system was established with CAD software UG6.0. On that basis, dynamic simulation software of assembly process and power transmission process of the system was developed. Running the software can reproduce assembly, disassembly and power transmission process. The software can not only be used in the analysis and transformation of old products, but also can be used replacing prototypes in developing of new products.

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Zhang, Guo Tai, and Zhi Hong Yin. "The Lightweight Design of CNC Lathe Spindle Box Based on Topology Optimization." Applied Mechanics and Materials 236-237 (November 2012): 464–68. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.464.

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In this paper,the mechanical properties of a certain type of CNC lathe spindle box are analyzed by the finite element software HyperWorks. On this basis, the topology optimization of the CNC lathe spindle box is done by the variable density method. where the spindle box relative density is taken as the design variable and the minimum volume of the spindle box as the objective function, its static deformation and the low modes as constraints．That is to find the optimal layout of the structure,and then the size optimization of the spindle box is done to make further amendments of the topology optimization results. This design method achieves the lightweight design of the spindle box, reduces manufacturing costs,and provides a theoretical basis for enterprises to improve the structure of CNC lathe spindle box.

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8

Yu, Y. M. "Finite Element Analysis on Mechanical Properties of Lathe Spindle." Applied Mechanics and Materials 378 (August 2013): 97–101. http://dx.doi.org/10.4028/www.scientific.net/amm.378.97.

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The ANSYS software was used to carry out finite element analysis on the mechanical properties of lathe spindle, taking C7620 lathe as research object. By static analysis, the maximum deformation and maximum stress value of spindle in specific operation were determined. Furthermore, spring-damper element was adopted to simulate elastic supports of bearing in dynamic analysis, and then the natural frequencies of the first five ranks and vibration modes of spindle were obtained. The research results in this paper have theoretical and practical significance in optimizing the design of lathe spindle parts and shortening production cycle.

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Mikolajczyk, Tadeusz, Tomasz Paczkowski, Danil Yurievich Pimenov, et al. "Analysis of the Deviation in a Low-Cost System for Stepless Digital Control of Conventional Lathe Spindle Speeds." Applied Sciences 9, no. 1 (2018): 12. http://dx.doi.org/10.3390/app9010012.

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A conventional manual lathe electric motor drives the multi-stage gearbox transmitting torque to the spindle so that the workpiece makes contact with the machine tool at a given speed. The cutting speed is proportional to both the diameter of the workpiece and the spindle speed, however, the increments in spindle speed are limited. Manual lathe machines cannot be regulated at the optimum cutting speeds for all diameters. An innovative modernization of the main driveline of a TSB16 manual lathe is proposed in this paper, allowing for a cost-effective system for digital control of spindle speeds using an inverter. The inverter is controlled using an 8-bit AO (analog output) converter with special software developed with Visual Basic. The results of the analysis and various test runs with this new system for automated control of spindle rotation, showed that the required cutting speed can be achieved for any workpiece diameter. The deviation of cutting-speed of the upgraded system for any turning diameter is greatly reduced in comparison with the deviation of cutting-speed of a manual lathe. Finally, tests on this versatile system demonstrated a cost-effective method for modernizing the drive system of conventional lathe machines.

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Hou, Pei Hong. "The NC Grinding Machine Rebuilding for TG30 NC Lathe." Advanced Materials Research 823 (October 2013): 52–57. http://dx.doi.org/10.4028/www.scientific.net/amr.823.52.

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Based on the characters of NC lathe and NC grinding machine, the NC grinding machine rebuilding for TG30 NC lathe is studied in this paper. According to the geometric parameters of grinding, choose appropriate TG30 NC lathe, keep the driving system of spindle and the feeding function of two axle linkage of NC lathe, increase the high speed rotating grinding head electric spindle, to realize the one-time processing of inner hole and groove fillet R grinding.

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Zhang, Dan, You De Wu, Xian Wen Wu, and Rui Wang. "A New Measurement Method of Rotary Precision of Lathe Spindle." Advanced Materials Research 338 (September 2011): 792–95. http://dx.doi.org/10.4028/www.scientific.net/amr.338.792.

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Rotary precision of the lathe spindle directly affects accuracy of the machined work-piece. With continuous improvement on requirements of rotary precision of the lathe spindle, a more accurate measurement method is needed to adopt to reflect actual shape precision of unprocessed part. Some advanced measurement principle and methods about rotary precision of the lathe spindle are researched, and also the measurement error is analyzed. The measurement result gotten by sensor concludes two parts, one is eccentric error caused by installation of the base ball, and the other is rotary error of the lathe spindle. The eccentric error is separated by the way of filter, as well as the rotary error is quickly and correctly measured by unidirectional digital measurement. The rotary error is superimposed on a base circle generated by algorithm. The roundness error is assessed by MZC. At last, verifying the feasibility of the new measurement method by means of real experiment.

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Qiang, He, Li Li-Li, Benjamin Giron-Palomares, Zhang Yong, and Li An-Ling. "The Optimization Design of Lathe Motorized Spindle." Recent Patents on Mechanical Engineering 8, no. 3 (2015): 249–59. http://dx.doi.org/10.2174/2212797608666150821230741.

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13

Horejs, O., M. Mares, and A. Mlcoch. "SMART SENSOR FOR ENHANCEMENT OF A MULTI-SPINDLE AUTOMATIC LATHE THERMAL ERROR COMPENSATION MODEL." MM Science Journal 2021, no. 3 (2021): 4706–12. http://dx.doi.org/10.17973/mmsj.2021_7_2021079.

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The development of a smart sensor is proposed to improve the thermal error compensation model of a multi-spindle automatic lathe. The smart sensor is capable of gathering real-time information about rotating spindle drum temperatures. Thereafter, the temperature obtained by the smart sensor is applied as input to the thermal error compensation model based on the transfer function instead of an indigenous temperature measured on the stationary part of the multi-spindle automatic lathe. Using spindle drum temperature as the model input increases the prediction of thermal displacements in the X-axis by 16%.

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Hu, Ru Fu, Xiao Ping Chen, and Huan Xin Yao. "Analysis and Optimization of Thermal Characteristics for NC Lathe Spindle System." Advanced Materials Research 341-342 (September 2011): 291–95. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.291.

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Improving thermal characteristics is a crucial approach for increasing machining accuracy of NC lathe. Modeling and analysis of thermal characteristics to a high speed NC lathe were implemented by using finite element method in this paper. Based on this, temperature rise characteristic of the whole spindle system was obtained. The thermal deformation of spindle system due to thermal-mechanical coupling was calculated. Layout and parameter were optimized for the radiating plate of spindle box. And this leads to a considerable reduction in the run-out error of spindle head. The optimization result reaches the expected goal.

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Lin, Yu Pei, and Yong Wang. "Quantum Genetic Optimization of Spindle Speed Ratio in Numerical Control Lathe with Automatic Transmission." Applied Mechanics and Materials 271-272 (December 2012): 1077–81. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1077.

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Determination of spindle rotate speed of lathe is an important issue when machine tools with changeable spindle gear ratio cutting metal parts, especially in heavy load cutting. Genetic optimization is used to automate design in engineering application for minimizing volume or weight. A quantum genetic optimization method was applied to calculate rotate speed and ratio of spindle transmission for gain maximum motor efficiency in numerical control lathe. Quantum bit code way was applied to simplify calculation and improve compatibility. Rotate angle strategy gate were introduced to Quantum gate for realizing evolution operation. The results were compared with a trial and error procedure usually applied. Quantum genetic arithmetic produced quite well results promptly supplying economic cutting parameters of numerical control (NC) lathe.

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Suryaningrat, Albertus Rianto, Nasril, Marsetiayu Ningsih, and Yanyan Nurhidayat. "Spindle Thermal Evaluation Thermal on Realiability Test of Numerical Controlled Lathe." Majalah Ilmiah Pengkajian Industri 13, no. 2 (2019): 121–28. http://dx.doi.org/10.29122/mipi.v13i2.3150.

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In the process of designing and manufacturing of CNC machine tools, reliability testing is needed to determine the reliability of the main component design and sub assembly. The precision of machine tools is greatly influenced by the temperature generated when the machine tool operates, both which arise from friction and overload.Evaluation of spindle axis errors caused by thermal distortion of the spindle bearing is based on ISO 230-3: 2007, ISO 10791-10: 2001 and ISO 13041-8: 2004. Temperature measurement at several measuring points on the spindle head to determine the increase in temperature on the main spindle bearing when getting more load or cutting process.The evaluation results showed that spindle erroneous error with a temperature increase in the spindle head was 16.3 oC by 13 um with no loading, while with loading 71.9 um with a temperature increase of 18.0 oC.

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Xiang, Sitong, Xiaolong Zhu, and Jianguo Yang. "Modeling for spindle thermal error in machine tools based on mechanism analysis and thermal basic characteristics tests." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 18 (2014): 3381–94. http://dx.doi.org/10.1177/0954406214531219.

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This paper proposes a method to accurately predict thermal errors in spindles by applying experimental modifications to preliminary theoretical models. First, preliminary theoretical models of the temperature field and the thermal deformation are built via mechanism analysis, which is based on the size of the spindle and the parameters of the bearing. Then, thermal basic characteristics tests are conducted at two different initial temperatures. Finally, the results of the thermal basic characteristic tests are evaluated, and the preliminary theoretical model is modified to obtain the final model. A simulation of axial thermal deformation under different speeds is conducted by finite element analysis. It shows that the relationship between the axial thermal deformation and the speed is approximately linear. The model is validated via some experiments on the spindle of a numerical control lathe. The results indicate that the proposed model precisely predicts the spindle’s temperature field and multi-degree of freedom thermal errors.

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Denisenko, Aleksandr, Mihail Yakimov, and Kseniya Borisova. "RADIAL STIFFNESS ANISOTROPY OF BODY BORING FOR LATHE SPINDLE BEARINGS." Bulletin of Bryansk state technical university 2021, no. 5 (2021): 23–31. http://dx.doi.org/10.30987/1999-8775-2021-5-23-31.

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In the paper there are considered problems connected with the radial stiffness anisotropy of body borings for lathe spindle bearings. Factors having an influence upon stability of its operation characteristics of a machine-tool during idling are considered.  The analysis of force factors having an influence upon bearings of a spindle unit during lathe idling is carried out. The work purpose is to determine a quantitative and qualitative situation in the changes of boring forms for spindle bearings under the impact of loads mentioned. As an object of investigations there is chosen the lathe “Vector” manufactured at the Middle-Volga machine-tool plant. A finite element modeling is carried out for deformation investigations in the body boring of the spindle unit under the impact of forces caused by weight and imbalance of the rotating spindle. There is shown a geometrical model of a spindle carrier body, the peculiarities of a finite element model formation and a procedure for the fulfillment of a numerical experiment are described, and approaches of boundary conditions setting are also considered. As a result of a finite element there are obtained values of finite element unit displacements lying on the surface of the body boring of the spindle carrier under the impact of the mentioned power factors. The results found are presented for illustration in the form of solid and flat graphical dependences. The analysis of numerical experiment results has confirmed the presence of the stiffness anisotropy in spindle unit bearings. The phenomenon of stiffness anisotropy in bearings was already under consideration in investigations carried out earlier. But the results of the numerical experiments carried out by us have shown that along with other factors the imbalance forces together with design peculiarities of body parts have an influence upon the constancy of elastic characteristics of bearings.  The matter obtained can be used during development of measures for design changes in a spindle unit body with the purpose of stiffness anisotropy decrease in the borings for bearing.

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Mizuguchi, Hiroshi, Mikio Iwakiri, Yutaka Ido, and Hidenori Shinno. "A Real-Time Measuring Method of Spindle Center Transition for NC Lathe." International Journal of Automation Technology 2, no. 6 (2008): 486–91. http://dx.doi.org/10.20965/ijat.2008.p0486.

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Thermal displacement in the spindle system has great influence on the machining accuracy. Therefore it is very important to evaluate the thermal displacement of the spindle precisely. In the conventional measurement method for thermal displacement of the spindle, the measurements were taken during no-load running with non-contact sensors put close to the outside of a workpiece. However, in fact, it is essential to evaluate thermal displacement of the spindle while a machine tool is machining a workpiece actually. The measurement of the thermal displacement of the spindle during actual machining is generally difficult. In this paper, we propose a new method by which we measure thermal displacement of the spindle while we are actually machining a workpiece with an NC lathe. The experiment was performed with various cutting conditions and the result of the thermal displacement of the spindle corresponding to each condition was observed. Then, by analyzing the experimental result, we obtained mathematical models that show the relation between thermal displacement and spindle motor output.

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Lin, Chih-Jer, Xiao-Yi Su, Chi-Hsien Hu, Bo-Lin Jian, Li-Wei Wu, and Her-Terng Yau. "A Linear Regression Thermal Displacement Lathe Spindle Model." Energies 13, no. 4 (2020): 949. http://dx.doi.org/10.3390/en13040949.

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Thermal error is one of the main reasons for the loss of accuracy in lathe machining. In this study, a thermal deformation compensation model is presented that can reduce the influence of spindle thermal error on machining accuracy. The method used involves the collection of temperature data from the front and rear spindle bearings by means of embedded sensors in the bearing housings. Room temperature data were also collected as well as the thermal elongation of the main shaft. The data were used in a linear regression model to establish a robust model with strong predictive capability. Three methods were used: (1) Comsol was used for finite element analysis and the results were compared with actual measured temperatures. (2) This method involved the adjustment of the parameters of the linear regression model using the indicators of the coefficient of determination, root mean square error, mean square error, and mean absolute error, to find the best parameters for a spindle thermal displacement model. (3) The third method used system recognition to determine similarity to actual data by dividing the model into rise time and stable time. The rise time was controlled to explore the accuracy of prediction of the model at different intervals. The experimental results show that the actual measured temperatures were very close to those obtained in the Comsol analysis. The traditional model calculates prediction error values within single intervals, and so the model was divided to give rise time and stable time. The experimental results showed two error intervals, 19µm in the rise time and 15µm in the stable time, and these findings allowed the machining accuracy to be enhanced.

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Mitin, E. V., S. P. Sul’din, and A. E. Mitina. "Spindle Assembly by Induction Heating for a Lathe." Russian Engineering Research 40, no. 3 (2020): 242–44. http://dx.doi.org/10.3103/s1068798x2003017x.

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22

Kavitha, C., and S. Denis Ashok. "A New Approach to Spindle Radial Error Evaluation Using a Machine Vision System." Metrology and Measurement Systems 24, no. 1 (2017): 201–19. http://dx.doi.org/10.1515/mms-2017-0018.

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AbstractThe spindle rotational accuracy is one of the important issues in a machine tool which affects the surface topography and dimensional accuracy of a workpiece. This paper presents a machine-vision-based approach to radial error measurement of a lathe spindle using a CMOS camera and a PC-based image processing system. In the present work, a precisely machined cylindrical master is mounted on the spindle as a datum surface and variations of its position are captured using the camera for evaluating runout of the spindle. TheCircular Hough Transform(CHT) is used to detect variations of the centre position of the master cylinder during spindle rotation at subpixel level from a sequence of images. Radial error values of the spindle are evaluated using the Fourier series analysis of the centre position of the master cylinder calculated with the least squares curve fitting technique. The experiments have been carried out on a lathe at different operating speeds and the spindle radial error estimation results are presented. The proposed method provides a simpler approach to on-machine estimation of the spindle radial error in machine tools.

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Soemardi, Heryanto Budiono. "PERAWATAN PREVENTIF MESIN BUBUT MENGGUNAKAN METODE ANALISIS GETARAN DALAM BERBAGAI KONDISI KECEPATAN SPINDLE." Otopro 15, no. 2 (2020): 40. http://dx.doi.org/10.26740/otopro.v15n2.p40-44.

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This research proposes a new idea of the preventive maintenance method of the lathe by analyzing the vibration on the fixed gear gearbox of the Maximat lathe. From the results of the vibrations that occur, checks are carried out on the lubricating oil, disability of the existing gears and bearings, and then repairing the gear and bearing and replacing the lubricating oil. To find out the magnitude of vibration that occurs in this maximat lathe, rotation variations are carried out by 1000 (rpm), 1500 (rpm) and 2000 (rpm). The highest average amplitude value at 1000 RPM engine speed is on the Bu04 machine with a value of 0.034 mm / s RMS while the lowest value is obtained on the Bu03 lathe with a value of 0.029 mm / s RMS. At 1500 RPM engine speed, the highest average amplitude value is obtained on the Bu03 lathe with a value of 0.045 mm / s RMS. On the Bu02 lathe with a value of 0.032 mm / s RMS. At 2000 RPM engine speed, the highest average value of amplitude was obtained in the Bu03 lathe with a value of 0.069 mm / s RMS. While the lowest value obtained on the Bu02 lathe with a value of 0.050 mm / s RMS. The lower the vibration of the lathe, the more optimal the results of turning. There is an influence between the speed of the engine against the vibrations that occur. Lathe with a high amplitude level indicates that there are components that need attention

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Liu, Hong Xia. "The Simulations of Movements in the Process of Machining the Lathe Spindle." Applied Mechanics and Materials 44-47 (December 2010): 190–94. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.190.

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In this paper, the processes of the lathe spindle are firstly introduced. Next, 3DS MAX software is used to model the lathe spindle with actual sizes. Based on the 3D model of the spindle, the 3D model of its blank is established according to the characteristics of the spindle. All used cutting tools are modeled in 3DS MAX software. Then the changes in the allowance and the movements of cutting tools and the workpiece are simulated in this software. At last, all animations are composed with appropriate explanations. The synthetical animation is saved as a .avi type file to play the machining simulation. And also, the file may be loaded into a multimedia courseware to explain the whole process to students in class. The machining simulation can improve the efficiency and effectiveness of learning. It can be given to students as a tutorial to use to teach oneself.

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Wang, Ke, Ji Hang Liu, Guo Kui Wu, and Xing Wei Sun. "Thermal Structure Coupling Analysis of Lathe Built-In Electric Spindle under Intermittent Load." Advanced Materials Research 989-994 (July 2014): 2922–25. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2922.

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Built-in electric spindle has been the core component of machine tool, whose temperature problem is serious. Internal heat source are greatly influenced by load. Based on which has the function of automatic clipping chuck inversion type vertical lathe built-in electric spindle prototype as the research object, using the theory of thermal stress and finite element, established the intermittent load cases hot - structure coupling numerical analysis model of the electric spindle. After overall analyzing electric spindle within the transient temperature field under the action of the intermittent load, the winding temperature changing with time curve is given. On that basis, electric spindle thermal deformation has been carried on the analysis and calculation, gets the shaft extension end axial thermal deformation, provides theoretical basis for the thermal error compensation.

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Gao, Chang Shui, Zhuang Liu, Jian She Zhao, Le Ping Zhang, and Yi Shun Zhao. "FEM-Based Topological Optimization on the Spindle Box of Heavy Duty CNC Lathe Machine." Applied Mechanics and Materials 598 (July 2014): 229–32. http://dx.doi.org/10.4028/www.scientific.net/amm.598.229.

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A topological optimization on the spindle box of a heavy duty lathe was studied. The objective of the work was to seek optimum material distribution and lighter mass of the spindle box, while maintain its original stiffness, strength and natural frequencies. Firstly, static and modal analyses were carried out. Then, the topological optimization was conducted through constraints of spindle hole’s displacement and lower-order natural frequencies, with minimized material volume as objective. Finally, a spindle box with optimized structure was obtained.

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Saravanan, S., G. S. Yadava, and P. V. Rao. "Condition monitoring studies on spindle bearing of a lathe." International Journal of Advanced Manufacturing Technology 28, no. 9-10 (2006): 993–1005. http://dx.doi.org/10.1007/s00170-004-2449-0.

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28

Liu, Haiyang, Yimin Zhang, Changyou Li, and Jianguo Gu. "Reliability optimization design of deformation of CNC lathe spindle considering thermal effect." Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability 235, no. 5 (2021): 769–82. http://dx.doi.org/10.1177/1748006x21995380.

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Angular contact ball bearings are widely used in the field of rotating machinery due to their obvious advantages such as relatively good positioning accuracy, high speed rotating performance and low cost, which have already become the most important transmission components. The heterogeneous thermal deformation caused by the high speed effect of bearing parts will lead to excessive noise and even gluing, which can further significantly reduce the machining accuracy of machine tool. Therefore, it is vital to improve the deformation resisting capability and operational reliability of the whole system. For this purpose, this paper presents a reliability model for computerized numerical control (CNC) lathe spindle by considering thermal effect. A five-degree-of-freedom quasi-static model considering thermal deformation is firstly proposed to calculate contact load and contact angle. Then the transient thermal network method is used to solve the temperature value of multi-node spindle-bearing system, and the validity of the proposed model is verified by experiments at different speeds. Next the modified first-order and second-moment method (FOSM) is used to calculate the reliability and reliability sensitivity of CNC lathe spindle deformation model considering thermal effect. Finally, the constrained nonlinear optimization method for the reliability model is proposed and applied to CNC lathe spindle. The results show that the reliability of the optimized model is significantly improved and the reliability robustness is enhanced.

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Agostinho, Alessandra Marçal, Paula Regina Miyoshi, Nelson Gnoatto, Helena de Freitas Oliveira Paranhos, Luciene Cristina de Figueiredo, and Sérgio Luiz Salvador. "[NO TITLE AVAILABLE]." Brazilian Dental Journal 15, no. 2 (2004): 138–43. http://dx.doi.org/10.1590/s0103-64402004000200010.

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Polishing of dental prostheses can cause a dangerous cycle of cross-contamination involving dentists, laboratory technicians, patients and auxiliary personnel. The aim of this study was to show the microbial contamination in the dental laboratory during the polishing procedure of complete dentures. For this purpose, 4 experiments were conducted. Experiment I - Determination of the total colony-forming units (CFU) counts contaminating complete maxillary dentures. During the polishing procedure, determination of the CFU counts transferred to the operator (Experiment II) and of the total CFU counts transferred to previously sterilized complete dentures (Experiment III). Experiment IV - The total counts of remaining CFU in the lathe spindle after Experiments II and III. Complete dentures were highly contaminated (mean = 1.4 x 10(7) CFU/mL). There was a elevated level of contamination by splatter and aerosols. There was high microbial transfer from the contaminated lathe spindle to the sterile prostheses (mean = 1.7 x 10(7) CFU/mL). The spindles were highly contaminated after polishing procedures (mean = 3.5 x 10(8) CFU/mL). The polishing of dental prostheses is a possible source of transmission of communicable diseases in the laboratory and requires improved techniques for infection control.

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Ma, Jia Xing. "Application of PLC in the DC Vertical Lathe Spindle Control." Applied Mechanics and Materials 687-691 (November 2014): 480–83. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.480.

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CNC vertical lathe is the main on products. The domestic and foreign demand is also very big. The key part of the high precision is on the control of the spindle. This design is with the German SIEMENS company programmable controller (PLC), S7-200 as the main controller; Germany SIEMENS company 6 ra7075 dc speed regulator, Z4 dc speed regulating device of dc motor, dc speed control was adopted to realize efficient and accurate control of machine tool spindle, and the electrical principle diagram is given.

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31

Sikorski, Jakub, and Witold Pawłowski. "Innovative design of lathe collet opener mechanism." Mechanik 90, no. 10 (2017): 837–39. http://dx.doi.org/10.17814/mechanik.2017.10.123.

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Presented is an innovative lathe collet opener mechanism design. In the proposed solution collet is screwed into the spindle to prevent mutual sliding of these elements. By such attachment the opening and closing of the collet does not cause any longitudinal movement of the workpiece which enhances the accuracy and repeatability of the workpiece clamping.

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Liu, Le Ping, and Guo Hong Deng. "Thermal Analysis and Optimization Design on Spindle Bearing of GSCK200A CNC Lathe." Advanced Materials Research 314-316 (August 2011): 1760–63. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1760.

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Establish the three-dimensional finite element model of GSCK200A type High-speed & high-precision CNC Lathe spindle bearing, based on tribology and heat transfer theory, using ANSYS to analyze the corresponding temperature field and thermal deformation of spindle bearing in steady working state, according to this thermal deformation to obtain decrease volume of radial clearance, and the installation clearance optimization scheme is putted forward.

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Zhang, Zhi Wei, Song Li, Bing Bing Chen, and Jin Chun Song. "Design of Testing System for Main Spindle Box of CNC Lathe Based on LabVIEW." Advanced Materials Research 590 (November 2012): 465–70. http://dx.doi.org/10.4028/www.scientific.net/amr.590.465.

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According to the testing craft and requirements of CNC Lathe about main spindle box, testing system of hardware and software structure was designed in this paper. It adopts sensors, data acquisition cards, industrial control computer, frequency converter and so on as hardware, good data analysis methods, and LabVIEW as software tool, to realize real-time monitoring of main spindle box testing conditions.

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Lou, Bin Chao. "W722 Lathe of Fault Detection and Diagnosis." Advanced Materials Research 328-330 (September 2011): 672–76. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.672.

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Shanghai YinChaoChang a W722 lathe processing of metal parts, workpiece surface machining quality external circular no obvious problem, and the machine's vibration is small. But in the processing of main parts - rubber managers stamped drum, workpiece surface appear periodically outside round the chatter marks, general examination of hard to find the failure causes of machine tools. We adopt mechanical fault diagnosis technology to find fault location and fault machine of the machine, first nature of transmission chain of analysis and calculation, obtains each train parts, use characteristic frequency JGZY - 1C type mechanical failure diagnosis in the daily use of the lathe spindle 560 turn/points and 735 turn/cent two kinds of rotating speed sensor separately carried on the test, pick up the spindle box, respectively go knife box and slip board box to collect the vibration signal of signal filtered (stationary fault) and demodulation spectral analysis, got a lot of lathe vibration signal spectrum diagram. And the calculated value and vibration signal spectrum diagram compares analysis, find out the fault location and machine determine the fault properties. Replace the corresponding gear and bearing, fault phenomena disappear.

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Zhang, Jian Zhong, Yuan Yuan Liu, Ying Ying Xin, Yong Jing Meng, and Fang Fang. "The Reformation of Structure to the C5225 Double Column Vertical Lathe." Advanced Materials Research 655-657 (January 2013): 1210–13. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1210.

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A general universal vertical lathe was studied in this paper which comprises two columns. The lathe can be used for roughing the cylindrical workpiece, end surface of inner hole and the inner and outer cone etc. The lathe structure and hydraulic system were improved on the basis of keeping the basic operating functions. After improvement of the lathe structure, it is more convenient for finding the exact position of the workpiece and the loading capability was improved. Meanwhile, the spindle can work smoothly and precisely. According to the improvement of the hydraulic system of the machine, the level of automation was enhanced and the working ability of the lathe was improved.

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Sheng, Zhong Qi, Zhi Wei Xu, Hua Long Xie, and Jing Ye Li. "Performance Analysis of Spindle System of NC Machine Tools." Applied Mechanics and Materials 16-19 (October 2009): 693–97. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.693.

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The performance of spindle system of machine tools directly affects the characters of machine tools. The static and dynamic stiffness of spindle system is one of the main factors that affect the machining precision of machine tools and the performance analysis of spindle system occupies an important position in the design of machine tools. Based on ANSYS, this paper analyzed static stiffness, vibration characters and harmonic response of spindle system of SSCK63-400-typed CNC lathe. Selecting improving the characters and saving the cost of spindle as optimization object and using APDL of ANSYS, the optimization of the spindle is completed by the optimization tools of ANSYS. This research provided the basis for statics and dynamics design of spindle system, shortened the design period and improved the design efficiency.

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GUO Chen-guang, 郭辰光, 韩. 雪. HAN Xue, 李. 源. LI Yuan, and 谢华龙 XIE Hua-long. "Thermal error modeling for spindle system of precision CNC lathe." Optics and Precision Engineering 24, no. 7 (2016): 1731–42. http://dx.doi.org/10.3788/ope.20162407.1731.

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38

Abbas, A. T. "Enhanced CNC lathe capability by addition of a grinding spindle." International Journal of Production Research 41, no. 12 (2003): 2699–709. http://dx.doi.org/10.1080/0020754031000088174.

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39

Yi, Qian, Congbo Li, Qianqian Ji, Daoguang Zhu, Yan Jin, and Lingling Li. "Design optimization of lathe spindle system for optimum energy efficiency." Journal of Cleaner Production 250 (March 2020): 119536. http://dx.doi.org/10.1016/j.jclepro.2019.119536.

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40

Lee, JungChul, Wei Gao, Yuki Shimizu, Jooho Hwang, Jeong Seok Oh, and Chun Hong Park. "Spindle error motion measurement of a large precision roll lathe." International Journal of Precision Engineering and Manufacturing 13, no. 6 (2012): 861–67. http://dx.doi.org/10.1007/s12541-012-0112-5.

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41

Guo, Rui, Sung-Hyun Jang, and Young-Hyu Choi. "Torsional vibration analysis of lathe spindle system with unbalanced workpiece." Journal of Central South University of Technology 18, no. 1 (2011): 171–76. http://dx.doi.org/10.1007/s11771-011-0676-8.

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42

Popescu, Daniel. "DETERMINING THE BALANCE CONFIGURATION, IN CASE OF THE OSCILLATING MOVEMENT OF THE MAIN SPINDLE AT CNC LATHE." International Journal of Engineering Technologies and Management Research 7, no. 6 (2020): 41–46. http://dx.doi.org/10.29121/ijetmr.v2020.i7.6.692.

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In the paper we present a mathematical model through which are determined the balance conditions, needed for the stability analysis of the oscillating movement of the main spindle at CNC lathe. We take into account Hamilton's variation principle, the axiom of impulse derivative and the axiom of kinetic moment derivative. We present the general movement equations that generate the oscillations based on the calculus hypotheses, performing the introduction of the external solicitations. Establishment of the balance configuration is done by imposing the conditions that the system of forces that act upon the ensemble spindle – bearings - tool causes a deformation of the spindle, without producing spindle vibration. We obtain the new differential equations of the movement, in which the forces and moments are determined from the static case, based on which we can determine the integration constants in the characteristic points of the main spindle.

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Popescu, Daniel. "DETERMINING THE BALANCE CONFIGURATION, IN CASE OF THE OSCILLATING MOVEMENT OF THE MAIN SPINDLE AT CNC LATHE." International Journal of Engineering Technologies and Management Research 7, no. 6 (2020): 41–46. http://dx.doi.org/10.29121/ijetmr.v7.i6.2020.692.

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In the paper we present a mathematical model through which are determined the balance conditions, needed for the stability analysis of the oscillating movement of the main spindle at CNC lathe. We take into account Hamilton's variation principle, the axiom of impulse derivative and the axiom of kinetic moment derivative. We present the general movement equations that generate the oscillations based on the calculus hypotheses, performing the introduction of the external solicitations. Establishment of the balance configuration is done by imposing the conditions that the system of forces that act upon the ensemble spindle – bearings - tool causes a deformation of the spindle, without producing spindle vibration. We obtain the new differential equations of the movement, in which the forces and moments are determined from the static case, based on which we can determine the integration constants in the characteristic points of the main spindle.

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44

Montusiewicz, J., and A. Osyczka. "Computer aided optimum design of machine tool spindle systems with hydrostatic bearings." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 211, no. 1 (1997): 43–51. http://dx.doi.org/10.1243/0954405971516068.

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A general model of the spindle system with hydrostatic bearings is presented. In this model the whole system is divided into subsystems. Each of these subsystems is modelled in order to obtain an optimization considering the global criteria of the system. A four-stage multicriterion optimization strategy is applied to solve the problem. On the basis of this strategy, which has a heuristic character, a computer aided optimum design software package for spindle systems for grinding and lathe machine tools is developed. The software is supported by computer graphics. An example of designing a grinding machine spindle system is given.

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45

Reddy, V. R., and A. M. Sharan. "Design of Machine Tool Spindles Based on Transient Analysis." Journal of Mechanisms, Transmissions, and Automation in Design 107, no. 3 (1985): 346–52. http://dx.doi.org/10.1115/1.3260720.

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This investigation is concerned with the design of machine tool spindles based on transient analysis. The dynamic equation of motion of a lathe spindle has been obtained using finite element analysis along with modal analysis. These equations are solved to obtain the displacement distribution along the spindle-workpiece system and thus the maximum dynamic displacement response. The system design parameters should be chosen in such a way that a combination of these would minimize the maximum dynamic displacement response. The global system matrices are replaced by condensed matrices of lower order, which preserve the lower modes with reasonable accuracy. This is done to economize on the computer memory storage and computation time. The system design parameters used are: (a) bearing spacing, (b) bearing stiffness, (c) location of an external damper, and (d) the workpiece diameter. The optimum design variables are selected based on single-parameter variation. The objective of this investigation is the minimization of the maximum dynamic response by a suitable choice of design variables.

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Tachiya, Hiroshi, Hiroki Hirata, Takayuki Ueno, Yoshiyuki Kaneko, Katsuhiro Nakagaki, and Yoshiaki Ishino. "Evaluation of and Compensation for Thermal Deformation in a Compact CNC Lathe." International Journal of Automation Technology 6, no. 2 (2012): 137–46. http://dx.doi.org/10.20965/ijat.2012.p0137.

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Because heat sources for compact Computer Numerically Controlled (CNC) lathes are likely to be closely arranged, they may cause large and complicated thermal deformation. Previously, we developed a CNC lathe with its heat sources arranged so as to reduce thermal deformation. This lathe achieved highprecision work under stable temperatures in continuous operation. However, in some cases, it could cause rapid thermal deformation. Previously, we proposed a simple method to compensate for the thermal deformation in CNC lathes by measuring temperatures at only a few points. By developing amodified compensation method capable of estimating minute and complicated thermal deformation and applying this method to the current lathe, processing accuracy will become more precise. Thus, we evaluated the thermal deformation of a compact CNC lathe. As a result, we found that the thermal deformation of the lathe was caused not only by movable parts, such as the spindle motor, but also by non-movable parts, such as the hydraulic unit. We therefore approximated the thermal deformation caused by the non-movable parts and estimated the change in the deformation caused only by the movable parts. This enabled us to express the thermal deformation by a simple linear equation, the form of which was same as that used for previous lathes. From these results, we were able to compensate for the thermal deformation using approximate equations for both movable and non-movable parts and we applied this method to the current lathe. We confirmed that the work error can be reduced under stable conditions using this method.

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DANIEL, POPESCU. "ESTABLISHING THE EQUATIONS THAT GENERATE THE VIBRATION MOVEMENT OF THE MAIN SPINDLE IN TRANSVERSAL DIRECTION AT CNC LATHE." International Journal of Engineering Science Technologies 4, no. 2 (2020): 25–30. http://dx.doi.org/10.29121/ijoest.v4.i2.2020.75.

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The paper presents a mathematical model for determining the movement equations that generate the transversal vibration of the main spindle at CNC lathe. For this purpose, we take into account the general equations which generate the vibration of the spindle, obtained by means of Hamilton’s Variational Principle as well as the impulse derivative and kinetic moment axioms. The solutions to the movement equations are arranged under the form of a system of first order partial derivatives equations, for which we determine the integration constants. This original way of establishing these equations allows further analysis of the main spindle vibrations in transversal direction and finding ways to decrease the vibration amplitude.

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Peretiaka, N. О. "Analysis of Thermal Control Data Spindle Supports Desktop Screw-Cutting Lathe." Visnyk of Vinnytsia Politechnical Institute 143, no. 2 (2019): 91–98. http://dx.doi.org/10.31649/1997-9266-2019-143-2-91-98.

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49

Liu, Le Ping, Hai Dong Li, Cong Cong Lin, and Qun Qun Gao. "Design and Optimization Based on the Spindle of Automatic Clamping Lathe." Applied Mechanics and Materials 397-400 (September 2013): 162–65. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.162.

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The article discusses the cause and necessity of the window fillet radius of C1206C which is a kind of bearing ring automatic clamping lathe equipment. The static and modal performance were analyzed by finite element software ANSYS and an value range of the window fillet radius was put forward. The result of this work has an obvious guiding effect on promoting the performance of the product.

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Vadgeri, Shivaraj S., Sunil R. Patil, and Sandip T.Chavan. "Static and Fatigue Analysis of Lathe spindle for Maximum Cutting Force." Materials Today: Proceedings 5, no. 2 (2018): 4438–44. http://dx.doi.org/10.1016/j.matpr.2017.12.012.

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