Relevant bibliographies by topics / New backward extrusion

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  1. Journal articles
  2. Book chapters
  3. Conference papers

Academic literature on the topic 'New backward extrusion'

Author: Grafiati
Published: 4 June 2025
Last updated: 14 July 2025

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Journal articles on the topic "New backward extrusion"

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Kačmarčik, Igor, Dejan Movrin, and Aljoša Ivanišević. "One Contribution to the Friction Investigation in Bulk Metal Forming." Journal for Technology of Plasticity 36, no. 1 (2011): 35–48. http://dx.doi.org/10.2478/v10211-011-0001-4.

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One Contribution to the Friction Investigation in Bulk Metal Forming Friction is resistance to relative motion when one body slides over another. In metal forming operations, both sheet metal and bulk metal forming, friction is undesirable but also unavoidable occurrence. It has negative impact on main process parameters as well as on workpiece quality. In order to obtain accurate results in metal forming experiments or simulations, the precise value of friction has to be known. In this paper several methods for friction evaluations, such as ring test, forward bar extrusion, backward - forward
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Wang, Qiang, Zhimin Zhang, Xubin Li, and Huifang Zhang. "Development of a novel high straining backward extrusion process." MATEC Web of Conferences 190 (2018): 06001. http://dx.doi.org/10.1051/matecconf/201819006001.

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In this study, a new method of backward extrusion is proposed. In this new process, a punch with a movable mandrel was designed. A hollow billet was firstly backward extruded and subsequently upset with the use of the punch after the mandrel returned. The extrusion and upsetting processes were successively executed in order for a higher effective strain to be imposed and a fibrous tissue flow direction to be controlled. In order for the capability of this process to be investigated, experimental and finite element (FE) methods were used. The effective strain of the final part prepared by both
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Nakamura, Tamotsu, Niels Bay, and Zhi-Liang Zhang. "FEM Simulation of a Friction Testing Metliod Based on Combined Forward Conical Can-Backward Straight Can Extrusion." Journal of Tribology 120, no. 4 (1998): 716–23. http://dx.doi.org/10.1115/1.2833770.

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A new friction testing method based on combined forward conical can-backward straight can extrusion is proposed in order to evaluate friction characteristics in severe metal forming operations. By this method the friction coefficient along the conical punch surface is determined knowing the friction coefficient along the die wall. The latter is determined by a combined forward and backward can extrusion of straight cans. Calibration curves determining the relationship between punch travel, can heights, and friction coefficient for the two tests are calculated based on a rigid-plastic FEM analy
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Jafarzadeh, Hossein, Alireza Babaei, and Firooz Esmaeili-Goldarag. "Friction Stir Radial Backward Extrusion (FSRBE) as a new grain refining technique." Archives of Civil and Mechanical Engineering 18, no. 4 (2018): 1374–85. http://dx.doi.org/10.1016/j.acme.2018.04.006.

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Hu, Cheng Liang, Shogo Osaki, Bai Xuan Cai, and Mitsuru Aoyama. "Optimization of the Steady Combined Forward and Backward Extrusion Test for Higher Sensitivity to Friction in Cold Forging." Defect and Diffusion Forum 414 (February 24, 2022): 147–53. http://dx.doi.org/10.4028/p-225h26.

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To improve the sensitivity of the steady combined forward and backward extrusion test proposed in previous work, an optimization job based on the finite element simulations was carried out. A raw material of 0.45% carbon steel was tested under different stain rates from 0.001s-1 to 1s-1 and different temperatures from 30°C to 400°C, and the material flow stresses were modelled by Hensel-Spittel equation. The deformation degree of the forward extrusion was set as 50%. The key parameters including the deformation degree of the backward extrusion, the ratio between the radius of the punch nose an
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Sugiyama, Sumio, Meng Yi, and Jun Yanagimoto. "Refining and Recycling of Metal Scraps by Semisolid Processing." Solid State Phenomena 192-193 (October 2012): 494–99. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.494.

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In this study, the authors propose a new refining process different from the rheorefining (a screen method) or the melt zone method. This new refining process is based on the gradient of solidification speed of the molten metal poured into a container. The molten metal in the cylindrical container firstly solidifies to columnar crystals from the wall of the container and a liquid phase gradually changes to semisolid state and progresses to the central portion of the container. After an intended semisolid state is achieved, a backward extrusion is carried out to extract the liquid phase compone
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Che, Xin, Qiang Wang, Beibei Dong, Mu Meng, and Zhiming Zhang. "Numerical and Experimental Analysis of Rotating Backward Extrusion as a New SPD Process." Metals and Materials International 26, no. 12 (2020): 1786–96. http://dx.doi.org/10.1007/s12540-019-00600-z.

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Im, Yong-Taek, Jae-Seung Cheon, and Seong-Hoon Kang. "Determination of Friction Condition by Geometrical Measurement of Backward Extruded Aluminum Alloy Specimen." Journal of Manufacturing Science and Engineering 124, no. 2 (2002): 409–15. http://dx.doi.org/10.1115/1.1445151.

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The proper determination of friction condition during metal forming operations is imperative for successful process design and production of parts. Through the years, various methods of determining the friction condition have been proposed, but all methods have some drawbacks. In this study, a new type of friction test named tip test based on backward extrusion of AL6061-O is proposed. The experimental set-up of this method induces the formation of a sharp radial tip on the extruded end of the workpiece. It has been found that the simple geometrical measurement of this radial tip position can
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Olszówka-Myalska, Anita, Dariusz Kuc, Jerzy Myalski, and Jacek Chrapoński. "Effect of Magnesium Matrix Grain Refinement Induced by Plastic Deformation in a Composite with Short Carbon Fibers." Metals 9, no. 7 (2019): 724. http://dx.doi.org/10.3390/met9070724.

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The magnesium matrix composite reinforced with 3 vol. % of short carbon fibers (Csf), fabricated, under industrial conditions, by the stir casting method, was applied to obtain composite bars by two extrusion methods: the novel method of cold severe plastic deformation with a forward-backward rotating die (KoBo) and conventional extrusion at 400 °C. The effect of Mg(α) grain refining, as well as fibers behavior and phenomenon at the fiber-matrix interface, was examined by optical microscopy, scanning electron microscopy with energy dispersive spectroscopy and scanning-transmission electron mic
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Bonnavand, F., A. N. Bramley, and D. J. Mynors. "A fast new numerical tool for designing prestressed dies for backward extrusion: Part 1: Die behaviour." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 215, no. 2 (2001): 169–79. http://dx.doi.org/10.1243/0954405011515262.

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Book chapters on the topic "New backward extrusion"

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Ewa Śliwa, Romana. "Metal Forming of Magnesium Alloys for Various Applications." In Magnesium Alloys Structure and Properties. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101034.

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The chapter presents an analysis of selected magnesium alloys as structural materials to be used in production of parts as well as their technological parameters in some manufacturing processes: metal forming and joining. Taking into account the analysis of microstructure and mechanical properties of conventional and new magnesium alloys and requirements of their possible applications (aviation, automotive, sport, etc.), the study of forming parts/products based on description of plastic formability of magnesium alloys in the processes of bulk metal forming (forging, extrusion, KOBO extrusion, rolling) and joining (friction stir welding) has been presented. Upsetting test, backward extrusion, and KOBO extrusion of complex cross-sectional profiles and forging process were conducted using magnesium alloys such as AZ31, AZ61, AZ80, WE 43, and Mg alloy with Li for the production of thin-walled profiles and forged parts. The range of temperatures and extrusion rate for manufacturing of these profiles were determined. Tests also covered the analysis of microstructure of Mg alloys in the initial state as well as after the extrusion process. The recommendations for realization of metal forming and joining processes of selected magnesium alloys have been presented.
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Conference papers on the topic "New backward extrusion"

1

Lowrie, James, and Gracious Ngaile. "Novel Extrusion Punch Design for Improved Lubrication and Punch Ejection." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9496.

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The extreme surface expansion and pressures observed during the backward extrusion process can have adverse effects on the surface of the workpiece and the life of the punches used in the process. After the forming process is complete, the ejection of the punch can further damage the part surface and reduce tool life because the pressures on the land of the punch remain quite high. The research presented in this investigation aims to reduce or eliminate the galling and surface damage for the backward extrusion process by creating a new class of punch which can create the opportunity for lubric
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Takatsuji, N., K. Dohda, and T. Funazuka. "Effect of Die Geometry Properties on Forming of Micro-Parts by Forward-Backward Extrusion of 6063 Aluminum Alloy." In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4202.

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The recent trend towards miniaturization of products and technology has boosted a strong demand for such metallic micro-parts with micro features and high tolerances. Conventional forming technologies, such as extrusion and drawing, have encountered new challenges at the micro-scale level due to the ‘size effects’ that tends to be predominant at this scale level. Friction is one of the predominant factors exercising strong effects in micro-forming. Previous studies varied grain size of the test pieces in order to examine size effects in micro-extrusion. In addition, the effects on the extrusio
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Ito, Shigekazu, Hiroaki Yoshida, Sachihiro Isogawa, Yoshihisa Doi, and Kuniaki Dohda. "New Evaluation Method for Lubricant in Forging Process." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21024.

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A lubricant plays a very important role in forging. It can reduce the forging load and make for smooth knockout. The tribo-simulator tests that have often been used as standard evaluation methods for metal forming lubricants includes the ring compression test and spike forging test. However, the forging of components such as flange bolt and constant velocity joint is more severe than a spike forging test or ring compression test. Thus, the development of an evaluation method for lubricants for use in more severe conditions is much awaited. We have developed a new evaluation tribometer using ba
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Letendre, Nicholas, Abrar Ebrahim, Shayan Darzi, and Jinjin Ha. "Analysis of Friction Effect on Backward Extrusion of Wire Splicing Couplers." In ASME 2024 19th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/msec2024-125277.

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Abstract Backward extrusion is a conventional metal forming process which is traditionally employed to produce symmetric, cylindrical, and hollow shaped products. During the backward extrusion process, the billet is initially placed within the die and subsequently compressed to draw the material flow through the gap between punch and die. This method offers several benefits, including increase the material utilization, improved dimensional precision and surface quality, satisfactory mechanical and microstructural properties, and the elimination of the need for additional post-processing operat
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5

Lou, Keyu. "Numerical and experimental investigation on full backward extrusion process in forming of pins from DC04 coil." In Sheet Metal 2025. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-20.

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Abstract. In pursuit of CO2-neutral and resource-efficient production, the trend is increasingly moving towards near-net-shape geometries. In the field of cold forming, sheet-bulk metal forming is particularly suitable, as it combines the advantages of sheet metal forming with those of bulk forming. For preliminary investigations, strip material is used due to its flexibility, while coils are used from an industrial perspective. To gain a fundamental understanding of the process, previous analyses by Henneberg and Merklein [1] have explored the potentials and challenges of a sheet-bulk metal f
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