Relevant bibliographies by topics / Dieless drawing process

Academic literature on the topic 'Dieless drawing process'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Dieless drawing process"

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Furushima, Tsuyoshi, Yuta Noda, and Kenichi Manabe. "Laser Dieless Drawing Process for Metal Micro-Tubes." Key Engineering Materials 443 (June 2010): 699–704. http://dx.doi.org/10.4028/www.scientific.net/kem.443.699.

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A drawing process using tools such as dies, plugs and mandrels has been conventionally applied as a means of miniaturizing tubes. However, it is not easy to scale down the conventional process to micro sizes for many reasons related to the tools used in the process. It is difficult to fabricate micro tools with high accuracy, and to insert a plug or a mandrel into a fine tube. Thus, the development of new drawing technologies for the fabrication of micro-tubes without the need for tools such as dies, plugs and mandrels is necessary. A laser dieless drawing technique with local heating using a laser as the heating source has been focused on for the fabrication of micro-tubes. In this study, a dieless drawing with a semiconductor laser setup is designed and developed. A tube of stainless steel, SUS304, with an outer diameter of 0.52mm and thickness of 0.1mm is used in the experiments. A laser dieless drawing experiment is carried out to investigate the effect of the laser power and drawing speed on the drawing limit. Finally, the effectiveness of laser dieless drawing process is discussed.
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Xia, Hong Yan, Zhan Jun Qi, and Di Wu. "A New Forming Method of Tapered Wire-Pole with Square Cross-Section." Applied Mechanics and Materials 373-375 (August 2013): 2004–7. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.2004.

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It is difficult to give shapes for tapered wire-pole with square cross-section in conventional plastic working process. A new dieless drawing method for making wire-pole has been developed. Through the dieless drawing theoretical study and experimental analysis of the wire-pole, a new wire-pole dieless drawing process is developed. The methods to ascertain key technique parameter are given out and the drawing velocity model is established. The experimental study shows that the dieless drawing technique is reasonable novel, the equipment is simple and one dieless drawing production procedure can replaces complete forming procedure in the general for tapered wire-pole dieless forming, which completes the deformation heat treatment, enhances the product’s overall performance simultaneously and has the practical value.
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Xia, Hong Yan, Qing Bian, and Di Wu. "Study on Mathematical Model of Dieless Drawing Speed Control for Variable Section Pipes." Applied Mechanics and Materials 373-375 (August 2013): 2034–37. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.2034.

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Dieless drawing, as a flexible metal forming method, could form pipes with arbitrary variable section. In order to control the shape and dimensions accurately, based on the analysis of deformation mechanism of arbitrary variable section pipes via dieless drawing process, the calculation method of dieless drawing speed during pipe forming is proposed theoretically,Furthermore, mathematical model of dieless drawing speed control is established by using piecewise polynomial to approach continuous speed curve. The study provide the basis for the dieless drawing speed microcomputer control system. The results of experimental investigation showed that the mathematical model indicates variation of dieless drawing speed quite well, and it is available to schedule the speeds for arbitrary variable section pipes dieless drawing.
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Li, Kaisong, Zhangke Wang, and Xuefeng Liu. "Study of Deformation Stability during Semi-Dieless Drawing of Ti-6Al-4V Alloy Wire." Materials 12, no. 8 (April 23, 2019): 1320. http://dx.doi.org/10.3390/ma12081320.

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A semi-dieless drawing technology has the advantages of producing a large deformation in a single pass and achieving high-precision dimensions of the finished products. However, instabilities can easily occur in a technique with a large amount of deformation, resulting in its failure. Herein, the deformation behavior of a wire during semi-dieless drawing is studied by finite element simulations. The instability mechanism of the semi-dieless drawing is proposed and validated by experiments. The experiments are conducted under the following conditions: a heating temperature of 950 °C; a distance between the die and heating coil of 20 mm; a feeding speed of 0.25 mm/s; a drawing speed range of 0.38–0.53 mm/s, and a die diameter range of 1.8–2.4 mm. The results show that by increasing the drawing speed or decreasing die diameter, the diameter fluctuation of the dieless drawn wire increases, and the semi-dieless drawing process easily becomes unstable. The diameter of the entering wire shows a fluctuating increasing trend owing to the variation in the drawing speed, which results in the instability during the semi-dieless drawing. The validity of the finite element model is verified by comparing the numerically predicted value and experimentally measured value of the drawn wire diameter.
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Furushima, Tsuyoshi, and Ken-Ichi Manabe. "Heat Assisted Dieless Drawing Process of Superplastic Metal Microtubes - From Zn22Al to β Titanium Alloys." Materials Science Forum 838-839 (January 2016): 459–67. http://dx.doi.org/10.4028/www.scientific.net/msf.838-839.459.

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A heat assisted superplastic dieless drawing process that requires no dies or tools is applied to the drawing of a Zn-22Al and β titanium superplastic alloy for not only circular but also noncircular microtubes such as square, rectangular and noncircular multi core tubes having square inner and rectangular outer cross sections. As a result, the tendency has been to increase the limiting reduction in area with increasing strain rate sensitivity index m value. We successfully fabricate Zn-22Al alloy, AZ31 magnesium, β titanium circular microtubes with outer diameter of 191μm, 890μm and 180μm, respectively. Furthermore, a noncircular micro tube, which has inner square tubes with a 335μm side, and an outer rectangular tube of 533×923μm were fabricated successfully. During the dieless drawing process, the geometrical similarity law in cross section which the tube is drawn while maintaining its initial shape can be satisfied. The smooth surface can be obtained in case of superplastic dieless drawing process without contact situation with dies and tools. Consequently, it is found that the superplastic dieless drawing is effective for the fabrication of circular and noncircular multicore microtubes.
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Hwang, Yeong-Maw, Zong Sian Li, and Tsu Yu Lin. "Formability Discussion in Dieless Drawing of Stainless Steel Tubes." Key Engineering Materials 626 (August 2014): 10–15. http://dx.doi.org/10.4028/www.scientific.net/kem.626.10.

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Stainless steel tubes are widely used in various fields, such as electrode tubes, probe tubes, electronic parts, painless injection needles, and micro-nozzles etc. In this study, a self-developed prototype dieless drawing machine is used to explore the formability of the dieless drawing process of SUS304 stainless steel tubes. The critical process parameters of the forming temperature, drawing velocity, the drawing accelerations and area reduction are investigated. A commercial finite element code of DEFORM 3D is used to simulate the temperature, stress, strain distributions and drawing velocity limit in the dieless drawing process of the stainless steel tubes. The maximum area reduction obtained can reach 50% and the better forming temperatures are between 1000°C and 1100 °C.
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Furushima, Tsuyoshi, Yutaro Hirose, Kazuo Tada, and Ken-Ichi Manabe. "Development of Superplastic Dieless Drawing Apparatus for 3Y-TZP Zirconia Ceramic Tube." Materials Science Forum 838-839 (January 2016): 597–602. http://dx.doi.org/10.4028/www.scientific.net/msf.838-839.597.

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A novel superplastic dieless drawing technique with local heating and tensile deformation has been focused on for fabrication of zirconia ceramic tube. In this study, 3Y-TZP zirconia ceramic tube with outer diameter of 6mm and inner diameter of 4mm as a superplastic material is used experimentally. An apparatus of superplastic dieless drawing with rotary stage for circumferential uniform heating and acetylene burner for high temperature of 1700°C is developed. The superplastiac dieless drawing experiment is carried out to investigate the effect of the ratio of drawing speed to feeding speed on the flexible controllability of diameter after drawing process. As a result, the reduction in area after drawing process can be controlled by the ratio of drawing speed to feeding speed. In addition, a maximum reduction in area of 79.2% can be realized in this process. Consequently, the validity of developed apparatus of superplastic dieless drawing for Zirconia ceramic tube can be demonstrated.
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Milenin, Andrij, Dorota Byrska-Wójcik, and Mirosław Wróbel. "Physical Modelling of Strain Induced Roughness of Copper Wire during Dieless Drawing Process." Materials Science Forum 1016 (January 2021): 900–905. http://dx.doi.org/10.4028/www.scientific.net/msf.1016.900.

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One of the possibilities of the dieless drawing is the production of ultrafine wire. In this case, it is possible for additionally stretch the wire, obtained in the conventional way. This may allow to obtain a wire of smaller diameter than the industry produces. However, the significant problem is the increase of the strain induced roughness of wire during dieless drawing. This problem has become important due to the fact that the resulting roughness can be comparable to the diameter of the wire and significantly reduce the workability. Thus, the solution of these problems requires plastometric studies of the material, physical and numerical modeling for prediction the roughness of the wire under conditions of dieless drawing. The experimental study shown, that the surface roughness of the copper wire after dieless drawing increases significantly at a deformation temperature above 300°C. The total roughness is associated both with the formation of oxides and the strain induced roughness.
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Tiernan, P., and M. T. Hillery. "Experimental and numerical analysis of the deformation in mild steel wire during dieless drawing." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 216, no. 3 (July 1, 2002): 167–78. http://dx.doi.org/10.1177/146442070221600302.

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Dieless wire drawing is the process of causing a reduction in a wire diameter without the use of conventional wire drawing dies. The wire, axially loaded with a force, is heated to an elevated temperature to initiate plastic deformation. The mechanics of this novel drawing process and a theoretical analysis of the deformation are discussed in this paper. The results of an experimental drawing programme carried out with mild steel wire at temperatures between 400 and 900°C are also presented. Mathematical models were developed and used to describe and predict the process deformation and both the stress and temperature distribution profile along the workpiece. A machine was designed and manufactured to facilitate an experimental programme of dieless drawing. The machine permitted continuous drawing of wire, while the reduction ratio, drawing load and temperature were automatically controlled using a personal computer. A finite element (FE) model of the wire was developed, and the results obtained from the FE analysis show good agreement with those obtained from both the experimental work and the mathematical modelling. Results obtained confirm that a complicated interdependence of the process parameters exists during the dieless drawing process.
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Milenin, Andrij, Mirosław Wróbel, Piotr Kustra, and Jiří Němeček. "Experimental and Numerical Study of Surface Roughness of Thin Brass Wire Processed by Different Dieless Drawing Processes." Materials 15, no. 1 (December 21, 2021): 35. http://dx.doi.org/10.3390/ma15010035.

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This paper examines the surface roughness of a thin brass wire (140–200 microns in diameter) after two dieless drawing (DD) processes, i.e., conventional dieless drawing (CDD) and incremental dieless drawing (IDD). In incremental dieless drawing, small increments in deformation were applied in several passes. It has been proven that the IDD process not only has a greater efficiency but also enables obtaining a wire with significantly lower surface roughness. The explanation for these effects is based on the results of the numerical modeling of both compared processes. The developed numerical model takes into consideration the initial roughness of the wire surface, shape and dimensions of grains, and their diversified mechanical properties. Nanoindentation measurements, microstructure, and plastometric studies allowed us to find the effective flow stress distribution in the grains. The IDD process was found to be much more stable and develop a much more uniform distribution of grain strain than the CDD process. More homogeneous deformation results in surface roughness reduction. Approximately 25–30% reduction in surface roughness of the wire produced by the IDD process was predicted by simulations and confirmed experimentally.
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Dissertations / Theses on the topic "Dieless drawing process"

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Xie, Yuandan. "Modelling and control of dieless wire drawing." Thesis, Sheffield Hallam University, 1987. http://shura.shu.ac.uk/6475/.

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A novel technique of drawing wire, i.e., dieless wire drawing, is described in which no conventional reduction dies are used. The wire is passed through a unit having stepped parallel bores filled with polymer melts, the smallest bore diameter being greater than the initial nominal wire diameter. The technique eliminates the need for a leader wire, prevents breakage during start-up, and eliminates the use of conventional reduction dies and, hence, the problem of die wear. An analysis has been developed for predicting the produced wire sizes for given drawing speeds, the pressure distribution within the unit and the drawing load during the drawing process. The performance of the drawing process is effected by means of the plasto-hydrodynamic action of the polymer melt within the unit. Heat is generated by mechanical dissipation during the drawing process. The effect of this upon the performance of the process is considered by coupling the energy equation into the analysis and allowing the polymer viscosity to be dependent on temperature. Agreement between the theory and experiment is found to be close. To further investigate the performance of the drawing process, an extensive experimental study has been undertaken, in which parameters such as drawing speeds, the temperature of the polymer and type of polymers are varied. Based on the theoretical and experimental results, a microcomputer-based control system for the dieless wire drawing process has been designed and built. A method with which the percentage reduction in area of the wire can be measured on line is proposed. Wires of desired qualities in terms of consistency in diameter over long lengths, or uniform change in area of the wire, are capable of being produced from the new system. A self-tuning controller for determinisic systems is proposed, which has the same structure as a conventional PID controller. The new self-tuning PID controller is based on a generalised self-tuning controller with pole assignment for deterministic systems. Simulation and experimental studies for several examples indicate that the new controller performs well and can be further improved to provide a fundamental method of tuning a PID controller.
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Book chapters on the topic "Dieless drawing process"

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Pawelski, O., W. Rasp, and K. Schmeisser. "Dieless Drawing — A Forming Process Allowing Flexible Shape Generation." In Proceedings of the Thirty-First International Matador Conference, 401–6. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-13796-1_61.

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Braatz, M., A. Dieckmann, J. Bohlen, and N. Ben Khalifa. "Experimental Setup of Dieless Drawing Process for Magnesium Wire." In Lecture Notes in Production Engineering, 38–46. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78424-9_5.

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Milenin, Andrij, Piotr Kustra, Miroslaw Wróbel, Valeriy Pidvysots’kyy, and Marek Packo. "The Dieless Drawing Process for the Elongation of Ultrafine Copper and Brass Wire." In Forming the Future, 467–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75381-8_39.

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Conference papers on the topic "Dieless drawing process"

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Furushima, Tsuyoshi, and Ken-ichi Manabe. "FE Simulation of Dieless Drawing Process for Small-Size Non-circular Tubes." In MATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2007. http://dx.doi.org/10.1063/1.2741038.

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Nikhare, Chetan P., Paul McMahon, and Faisal Aqlan. "An Experimental Study on Direct Current Dieless Drawing of 4130 Steel Tubes." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2906.

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Abstract Forming of tubes in various shapes has been a major interest in vehicle, instrumentation, decoration and precision industries. Due to a variety of shapes that can be achieved by tube forming, this manufacturing process has taken a major part in research and application. In this manufacturing process, a tube with a certain diameter and thickness can be considered to shape the part. The shaping or forming can be achieved by end forming, expanding the section, bending the section, buckling the tube, and/or reducing the section. Traditionally, to form these sections the rigid tool, flexible tool or fluid pressure would be needed to shape the tube. However, tools like mandrel or plug and their sizes limit the size of the tube to be formed. In this paper, tubes are formed by stretching them while simultaneously passing the direct current through. This process has been explored earlier by heating the tube using induction heating or rotary laser heating method. However, as no dies or tools are used to form these tubes, the process is considered dieless tube drawing which involves heating the tubes and drawing them into a reduced section. This study considers two different thicknesses but the same outer diameter tubes. The drawing force, shape, and microstructure are investigated. Based on the stress-strain curve, the yield to fracture and tensile to fracture strains are determined and discussed.
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Furushima, Tsuyoshi. "Finite Element Modeling of Dieless Tube Drawing of Strain Rate Sensitive Material with Coupled Thermo-Mechanical Analysis." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766578.

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