Transactions of Materials and Heat Treatment

Title：Influence of different reduction ratios on rotary forging thin disc with coaxial multi-tapered rollers

Authors：

Unit：

KeyWords：

ClassificationCode：TG331

year,vol(issue):pagenumber：2023,48(1):136-143

Abstract：

In order to study the forming process of thin disc by rotary forging with coaxial multi-tapered rollers, numerical simulation software Deform-3D was used to simulate and analyze it, and based on the reliable three-dimensional rigid-plastic finite-element model, the deformation characteristics of disc parts by rotary forging with coaxial multi-tapered rollers were studied. At the same time, the influences of different reduction ratios on rotary forging with coaxial multi-tapered rollers were researched, and the correctness of the numerical model was verified on the rotary forging machine. The results show that in the forming process of rotary forging with coaxial multi-tapered rollers, instability warpage and “mushroom head” shape with large top and small bottom are easy to appear, and the workpiece has the highest temperature at a certain distance from the center and the lowest temperature in the center. The metal flow speed gradually increases from the center to the edge, and the higher the reduction ratio in forming is, the greater the deformation resistance is, which leads to the gradual increasing of its force and energy parameters and non-uniform deformation degree, and also increases its central defect.

Funds：

国家自然科学基金资助项目(51875427); 四川省科技厅项目(2019YJ0519)

作者简介: 刘　鑫(1995-), 男, 硕士, 助教 E-mail: 2992372688@ qq. com

Reference：

[1] 　周德成, 苑世剑, 王仲仁. 摆动辗压件成形过程中产生的缺陷及防止办法[J]. 热加工工艺, 1992, (1): 35-37.

Zhou D C, Yuan S J, Wang Z R, Defects of workpieces producing in forming process of rotary forging and methods for preventing them [J]. Hot Working Technology, 1992, (1): 35-37.

[2] 　Oh H K, Choi S. A study on center thinning in the rotary forging of a circular plate [J]. Journal of Materials Processing Technology,1997, 66 (1-3): 101-106.

[3] 　Zheng Y, Liu D, Yang Y, et al. Investigation on metal flow during the hot axial closed die rolling process for titanium alloy discs [J]. The International Journal of Advanced Manufacturing Technology, 2016, 87 (9-12): 2445-2458.

[4] 　Wang G C, Guan J, Zhao G Q. A photo-plastic experimental study on deformation of rotary forging a ring workpiece [J]. Journal of Materials Processing Technology, 2005, 169: 108-114.

[5] 　Wang G C, Zhao G Q. Simulation and analysis of rotary forging a ring workpiece using finite element method [J]. Finite Elements in Analysis and Design, 2002, 38: 1151-1164.

[6] 　Loyda A, Reyes L A, Hernandez-Munoz G M, et al. Influence of the incremental deformation during rotary forging on the microstructure behaviour of a nickel-based superalloy [J]. The International Journal of Advanced Manufacturing Technology, 2018, 97 (5 -8): 2383-2396.

[7] 　Gey N, Bocher P, Uta E, et al. Texture and microtexture variations in a near-α titanium forged disk of bimodal microstructure [J]. Acta Materialia, 2012, 60 (6-7): 2647-2655.

[8] 　张金龙, 路婉丽, 王智民. 大型盘类件成形工艺及模具设计[J]. 模具技术, 2008, (4): 28-31.

Zhang J L, Lu W L, Wang Z M. Forming process and die design of large disk parts [J]. Die and Mould Technology, 2008, (4):28-31.

[9] 　Liu G, Yuan S J, Wang Z R, et al. Explanation of the mushroom effect in the rotary forging of a cylinder [J]. Journal of Materials Processing Technology, 2004, 151 (1-3): 178-182.

[10] Liu G, Yuan S J, Wang Z R, et al. Finite element model and simulation of rotary forging of a disc [J]. Acta Metallurgica Sinica (English Letters), 2000, (2): 470-475.

[11] Han X H, Hua L. Comparison between cold rotary forging and conventional forging [J]. Journal of Mechanical Science and Technology, 2009, 23 (10): 2668-2678.

[12] Han X H, Hua L. Prediction of contact pressure, slip distance and wear in cold rotary forging using finite element methods [J]. Tribology International, 2011, 44 (12): 1742-1753.

Service：

【This site has not yet opened Download Service】【Add Favorite】