锻压技术

挤压温度对温挤压模具载荷和应力的影响研究

英文标题：Influence research of extrusion temperature on warm extrusion die load and stress

作者：张安民

单位：泸州职业技术学院

分类号：

出版年,卷(期):页码：2014,39(7):106-112

摘要：

在生产中发现，当生产挤压壳体零件的不足200件时，多数模具因反复受载而开裂失效，而挤压温度的高低直接影响模具承受载荷和应力的情况。基于此，利用Deform仿真模拟软件及工艺试验来探讨挤压温度对模具载荷和应力的影响规律，寻找合理的挤压温度范围用以提高模具寿命。通过模拟获得温挤压时模具温度场分布图，不同温度下凸模载荷、凹模载荷与挤压行程的关系曲线图，凸模等效应力、凹模等效应力与凸模冲程的曲线关系图。采用相同的参数对壳体零件进行了实际加工，实验与模拟结果较吻合。通过分析可知：对模具材料3Cr2W8V钢进行温挤压时，挤压温度不低于700 ℃时，可以有效避免模具开裂，有效提高模具寿命。

It is found from the production site that most punches would be cracked and failed for repeated loading when squeezing shell parts less than 200. The situation of die load and stress are directly affected by extrusion temperature. Based on this, the influence laws of extrusion temperature to die load and stress were discussed using Deform and technology test, and reasonable extrusion temperature range to guide practice was put forward，which improved the die life. From the simulation，the die temperature distribution graph when warm extrusion，the relationship curves of load of punch and female die with stroke at different extrusion temperatures and the relationship curves between effective stress of punch and female die and punch stroke at different extrusion temperatures were obtained. The shell parts were processed with the same set of parameters, and the experimental results are consistent with simulation. The results show that when warm extrusion temperature is bigger than 700 ℃,the die cracking is avoided and the die life is improved for mold material of 3Cr2W8V.

基金项目：

“过程装备与控制工程四川省高校重点实验室”项目（GKZY201103）

张安民（1965-），男，硕士，副教授

参考文献：

[1]李传民. DEFORM5.03金属成形有限元分析实例指导教程[M]. 北京:机械工业出版社, 2006.

Li Chuanmin. Deform 5.03 Metal Forming Finite Element Analysis Tutorial Examples [M].Beijing:China Machine Press, 2006.

[2]栗育琴, 张安民. 温挤压模具冷热疲劳早期失效模拟分析与探讨[J]. 锻压技术, 2011, 36(6): 141-144.

Li Yuqin, Zhang Anmin. Simulation analysis and discussion of the early failure of warm extrusion because of die cold hot fatigue [J]. Forging & Stamping Technology, 2011，36(6):141-144.

[3]栗育琴. 基于DEFORM的温挤压模具塑性变形失效分析[J]. 锻压技术, 2012, 37(1): 117-120.

Li Yuqin. The plastic deformation failure analysis of warm extrusion die based on DEFORM[J]. Forging & Stamping Technology, 2012，37(1):117-120.

[4]庞祖高, 苏广才, 夏薇,等. 影响温挤压模具的寿命因素及对策探讨[J]. 锻压技术, 2006, 31(2): 52-55.

Pang Zugao, Su Guangcai, Xia Wei, et al. Discussion of factor influencing warm extrusion die life and countermeasures [J]. Forging & Stamping Technology, 2006,31 (2):52-55.

[5]胡建军, 许洪斌, 金艳. 塑性成形数值仿真精度的提高途径[J]. 锻压技术, 2009, 34(2): 149-151.

Hu Jianjun, Xu Hongbin, Jin Yan. Approach for increasing precision of numerical simulation of plastic forming [J]. Forging & Stamping Technology, 2009, 34(2):149-151.

[6]栗育琴. 温挤压温度行为对模具早期失效的影响研究[D].南宁: 广西大学, 2009.

Li Yuqin. The Influence Study of Temperature Behavior to Early Failure of Warm Extruding Die[D].Nanning: Guangxi University, 2009.

[7]庞祖高, 苏广才, 夏薇,等. 温挤压模具的早期失效探讨及对策[J]. 热加工工艺, 2005,34 (9): 25-28.

Pang Zugao, Su Guangcai, Xia Wei,et al. Early failure inquirement and countermove of warm extrusion die[J]. Hot Working Technology, 2005,34(9): 25-28.

[8]程培源. 模具寿命与材料[M]. 北京: 机械工业出版社, 1999.

Cheng Peiyuan. Die Life and Material[M]. Beijing: China Machine Press, 1999.

[9]蒋鹏，韦韡，余光中,等. 重卡转向节多模膛锻造模具应力的数值模拟[J]. 锻压技术, 2010, 35(4): 151-154.

Jiang Peng, Wei Wei, Yu Guangzhong, et al. Die stress simulation for multi-cavity die forging of steering knuckle for heavy truck[J]. Forging & Stamping Technology, 2010, 35(4):151-154.

[10]Lee R S, Jou J L. Application of numerical simulation for wear analysis of warm forging die[J]. Journal of Materials Processing Technology, 2003,140:43-48.

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