网站首页期刊简介编委会过刊目录投稿指南广告合作征订与发行联系我们English
丁字臂锻件裂纹分析及工艺改进
英文标题:Crack analysis and process optimization of T-shaped arm forgings
作者:蔡佰煊 刘高 张运军 黄明伟 彭杰 胡成亮 赵震 
单位:上海交通大学 
关键词:丁字臂 温度场 等效应变场 速度场 裂纹 工艺改进 
分类号:TG316.3
出版年,卷(期):页码:2020,45(1):15-21
摘要:

 为解决实际生产中丁字臂锻件直孔端附近出现的裂纹问题,基于数值模拟对相应的温度场、等效应变场和速度场进行分析,认为直孔端附近材料的流动速度快且梯度大可能是引起裂纹的主要原因。在此基础上,提出了增设阻力沟的飞边结构设计和一模两件锻模设计的两种改进方案。结果表明,增设阻力沟可有效地降低直孔端处桥部飞边的流动速度,但是无法改变其流动速度不断增大的趋势;一模两件工艺方案,改变了直孔端的金属流动模式,改善了危险区域流动均匀性并获得较为均匀的温度场。后续将安排实际工艺试验,进一步开展验证工作。

 To solve the crack problem near the end of straight hole for T-shaped arm forgings in actual production, the corresponding temperature field, equivalent strain field and velocity field were analyzed by numerical simulation, and it was believed that the high flow velocity with large gradient of material near the end of straight hole might be the main reason to crack. According to this, two improved schemes of the flash structure design with resistance groove and the forging die design of two-cavity were proposed. The results show that adding the resistance groove could effectively reduce the flow velocity of material for bridge flash at the end of straight hole, but it could not change the increasing trend of flow velocity. The process design of die with two-cavity could change the flow pattern of metal at the end of straight hole, improve the flow uniformity in the dangerous area and achieve a relatively homogeneous temperature field. The actual process experiment will be arranged in the future to carry out verification work.

基金项目:
工业强基工程项目(TC180A3Y1/18)
作者简介:
作者简介:蔡佰煊(1996-),男,硕士研究生 E-mail:caibaixuan@sjtu.edu.cn 通讯作者:胡成亮(1980-),男,博士,研究员 E-mail:clhu@sjtu.edu.cn
参考文献:

 [1]朱财良. 丁字臂锻件工艺改进数值模拟[J]. 精密成形工程, 2011, 3(2):63-67.


Zhu C L. Numerical simulation of T-shaped arm process improvement[J]. Journal of Netshape Forming Engineering, 2011, 3(2):63-67.


[2]钟亚军, 谢晋市, 陈文琳, . 丁字臂锻造成形工艺改进及数值模拟[J]. 机械工程师, 2011, (8):68-70.


Zhong Y J, Xie J S, Chen W L, et al. Forging process improvement of T-shaped arm[J]. Mechanical Engineer, 2011, (8):68-70.


[3]吕刚, 周乐育, 涛雅, . SWRCH22A冷镦钢成形过程开裂分析及质量控制[J]. 锻压技术, 2018, 43(10):117-121.


Lyu G, Zhou L Y, Tao Y, et al. Cracking analysis and quality control in forming process for cold heading steel SWRCH22A[J]. Forging & Stamping Technology, 2018, 43(10):117-121.


[4]王贤敏. 1Cr18Ni9Ti不锈钢锻坯裂纹分析[J]. 铸锻热, 1997, (1):39-42.


Wang X M. Crack analysis of 1Cr18Ni9Ti stainless steel forging stock[J]. Heat Treatment Practice, 1997, (1):39-42.


[5]范金席, 顾燕龙, 胡显军, . Ni80Cr20合金板坯锻造裂纹成因分析及改进[J]. 锻压技术, 2018, 43(11):13-16.


Fan J X, Gu Y L, Hu X J, et al. Cause analysis and improvement on the forged crack for Ni80Cr20 alloy plate[J]. Forging & Stamping Technology, 2018, 43(11):13-16.


[6]张义帅. 316LN不锈钢锻造裂纹分析及工艺控制[D]. 太原: 太原科技大学, 2011.


Zhang Y S. Forging Crack Analysis and Process Control of 316LN Stainless Steel[D]. Taiyuan: Taiyuan University of Science and Technology, 2011.


[7]李洪波, 吕玫, 骆俊廷, . 直齿轮精密塑性成形时齿面裂纹的产生机理及控制方法[J]. 塑性工程学报, 2003, 10(1):25-27.


Li H B, Lyu M, Luo J T, et al. Generation mechanism and control method of tooth surface crack in precision plastic forming of spur gear[J]. Journal of Plasticity Engineering, 2003, 10(1): 25-27.


[8]赵宁, 张运军, 陈天赋, . V5型转向节臂部锻造开裂研究[J]. 塑性工程学报, 2017, 24(3): 7-12.


Zhao N, Zhang Y J, Chen T F, et al. Arm forging crack of V5 type steering knuckle[J]. Journal of Plasticity Engineering, 2017, 24(3): 7-12.


[9]Hu C L, Zeng F, Zhao Z, et al. Process optimization for design of duplex universal joint fork using unequal thickness flash[J]. International Journal of Precision Engineering and Manufacturing, 2015, 16(12): 2517-2527.


[10]Kakimoto H, Arikawa T. Prediction of surface crack in hot forging by numerical simulation[J]. Procedia Engineering, 2014, (81): 474-479.


[11]Liu Y H, Wu Y, Wang J, et al. Defect analysis and design optimization on the hot forging of automotive balance shaft based on 3D and 2D simulations[J]. The International Journal of Advanced Manufacturing Technology, 2018, 94(5-8): 2739-2749.


[12]Poursina M, Parvizian J. Simulation of folding defect in forging[A]. Somnath Ghosh, Jose C, June K, et al. AIP Conference Proceedings[C]. New York: American Institute of Physics, 2004.


[13]张毅峰, 陈胜, 潘安霞. ND5主连杆锻件裂纹分析[J]. 锻造与冲压, 2015, (17):75-77.


Zhang Y F, Chen S, Pan A X. Crack analysis of ND5 main connecting rod forging[J]. Forging & Metalforming, 2015, (17):75-77.

服务与反馈:
本网站尚未开通全文下载服务】【加入收藏
《锻压技术》编辑部版权所有

中国机械工业联合会主管 北京机电研究所有限公司 中国机械工程学会塑性工程分会主办
联系地址:北京市海淀区学清路18号 邮编:100083
电话:+86-010-82415085 传真:+86-010-62920652
E-mail: fst@263.net(稿件) dyjsjournal@163.com(广告)
京ICP备07007000号-9