Transactions of Materials and Heat Treatment

Title：Process design on cold upsetting and extruding for combination piston-pin

Authors： Sui Yi Liang Qiang

Unit： Chongqing University of Science & Technology Chongqing Technology and Business University

KeyWords： piston-pin cold upsetting and extruding forming load FEM DEFORM-2D

ClassificationCode：TG316

year,vol(issue):pagenumber：2019,44(6):97-102

Abstract：

According to the structural characteristics of combination piston-pin, two kinds of multi-station process schemes of cold upsetting and extrusion were formulated, and the forming process of piston-pin was simulated by software DEFORM-2D. Then, the metal flow rule, stress distribution rule and forming force in two different schemes were analyzed and compared. The simulation results show that the forging defects, such as folding and crackle do not appear in the piston-pin formed by the above two process schemes, but the forming process of “twice back extrusion+cone extrusion” has a more reasonable load distribution in each step forming. The production practice shows that the combination piston-pin satisfies the requirement of design size without folding and crack by “twice back extrusion+cone extrusion”. The simulation results are consistent with the technological experiment results. Thus, the above process can meet the requirement of plastic forming of parts.

Funds：

重庆市基础科学与前沿技术研究专项基金资助项目（cstc2017jcyjAX0175）

隋毅（1981-），男，硕士，工程师 E-mail：suiyi_1981@qq.com

Reference：

［1］胡慧玲, 林楚新. 某活塞销的断裂失效分析
［J］. 热加工工艺, 2015,44(24): 226-228.

Hu H L，Lin C X. Analysis on fracture failure of piston pin
［J］. Hot Working Technology，2015,44(24)：226-228.

［2］李炳, 陈伟, 李名尧,等. 汽车活塞销温-冷复合挤压成形工艺研究
［J］. 铸造技术, 2016,37(10): 2204-2207.

Li B，Chen W，Li M Y，et al. Study on warm and cold composite extrusion forming process for automobile piston pins
［J］. Foundry Technology，2016，37(10)：2204-2207.

［3］梁强. 活塞销冷镦挤成形微折叠缺陷分析及改进措施
［J］. 塑性工程学报, 2018, 25(6): 61-66.

Liang Q. Micro-folding defect analysis and improvement of cold upsetting-extruding process for piston-pin
［J］. Journal of Plasticity Engineering, 2018, 25(6):61-66.

［4］Lee D J, Kim D J, Kim B M. New processes to prevent a flow defect in the combined forward-backward cold extrusion of a piston-pin
［J］. Journal of Materials Processing Technology, 2003, 139(1)：422-427.

［5］王培安, 吴淑芳, 苗润忠, 等. 基于正交试验的活塞销挤压成形工艺研究及模具磨损分析
［J］. 铸造技术, 2018，39(3): 715-719.

Wang P A, Wu S F, Miao R Z, et al. Reasearch on piston pin extrusion process based on orthogonal test and analysis of mold wear
［J］. Foundry Technology, 2018,39(3): 715-719.

［6］王培安, 吴淑芳, 苗润忠, 等. 基于数值模拟杯套的温挤压成形工艺研究及模具磨损分析
［J］. 模具制造, 2017, 17(10):66-75.

Wang P A, Wu S F, Miao R Z, et al. Study on temperature extruding forming technology and die wear analysis based on numerial simulation cup
［J］. Die & Mould Manufacture, 2017, 17(10):66-75.

［7］杨庆华, 陈鑫, 孟彬, 等. 汽车活塞销振动挤压数值模拟分析
［J］. 浙江工业大学学报, 2013, 41(3):317-320.

Yang Q H, Chen X, Meng B, et al. Numerical simulation for vibration extrusion of automotive car piston pins
［J］. Journal of Zhejiang University of Technology, 2013, 41(3):317-320.

［8］王德俊, 姚志英, 李艳红,等. 活塞销冷挤压成形工艺研究
［J］. 热加工工艺, 2011, 40(17)：86-88.

Wang D J，Yao Z Y，Li Y H，et al. Study of cold extrusion forming process for piston pin
［J］. Hot Working Technology，2011, 40(17)：86-88.

［9］张莉, 李升军. DEFORM在金属塑性成形中的应用
［M］. 北京：机械工业出版社, 2009.

Zhang L, Li S J. DEFORM in the Application of Metal Plastic Forming
［M］. Beijing：China Machine Press, 2009.

［10］赵震, 陈军, 吴公明. 冷温热挤压技术
［M］. 北京：电子工业出版社, 2008.

［11］孙晓燕, 张太良, 张扣宝,等.三柱槽壳反挤压变形规律及提高反挤端面平齐度的凸模结构设计
［J］. 锻压技术, 2017, 42(2): 143-149.

Sun X Y, Zhang T L, Zhang K B, et al. Deformation regulation of backward extrusion for three-column groove shell and structure design of punch for improving backward extrusion transverse plane evenness
［J］. Forging & Stamping Technology, 2017, 42(2): 143-149.

［12］张彦富. 几何量公差与测量技术技术
［M］. 北京：北京航空航天大学出版社, 2015.

Zhang Y F. Fundamental of Geometric Tolerance and Measurement Technology
［M］. Beijing: Beihang University Press, 2015.

Service：

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