锻压技术

氮气弹簧缸筒热反挤压凸模结构对挤压成形力的影响

英文标题：Effect of hot backward extrusion punch structure of nitrogen spring cylinder on extrusion forming force

单位：北京机电研究所有限公司上汽通用五菱汽车股份有限公司海安北京机电研究所锻压产业研发中心常州市东力机械有限公司

分类号：TG376.2

出版年,卷(期):页码：2021,46(5):109-115

摘要：

氮气弹簧缸筒的常用加工方式为机加工，为了提高材料利用率和生产效率、增强成形工件的性能，设计了一种热反挤压工艺以加工氮气弹簧缸筒。使用DEFORM11.0软件进行数值模拟，分析了坯料初始温度对成形结果的影响以及凸模结构对成形载荷的影响，设计了工艺过程并加工了挤压模具。采用热反挤压工艺加工的氮气弹簧缸筒的材料利用率为80.8%，相比机加工提高了47.6%，生产效率相比机加工提高了50%，取得了显著经济效益。结果表明，随着坯料初始温度的升高，成形载荷减小；随着凸模工作带高度以及凸模斜度的增大，成形载荷增大；当坯料初始温度为1200 ℃且凸模工作带高度为5 mm时，最大成形载荷为1652 kN，采用热挤压模具在2000 kN液压机上能够成形出符合设计要求的工件。

The common processing method of nitrogen spring cylinder is machining. In order to improve the material utilization rate and production efficiency, and enhance the performance of formed part, a hot backward extrusion process was designed to process the nitrogen spring cylinder. The numerical simulation was carried out by using DEFORM11.0 software. The effect of blank initial temperature on the forming result and the effect of punch structure on the forming load were analyzed. The technological process was designed and the extrusion die was processed. The material utilization rate of nitrogen spring cylinder processed by hot backward extrusion process is 80.8%, which is 47.6% higher than that of machining, and the production efficiency is 50% higher than that of machining. The significant economic benefits has been achieved. The results show that the forming load decreases with the increasing of blank initial temperature, and increases with the increasing of the height of working belt and the inclination of punch, the maximum forming load is 1652 kN when the blank initial temperature is 1200 ℃ and the height of working belt of punch is 5 mm, the workpiece which meets the design requirements can be formed by using the hot extrusion die on the 2000 kN hydraulic press.

基金项目：

广西创新驱动发展专项课题（桂科AA18118040）；柳州市科技计划课题（2018AD50301）

张建波（1996-），男，硕士研究生 E-mail：937971364@qq.com 通讯作者：蒋鹏（1964-），男，博士，研究员 E-mail：jp1964@163.com

参考文献：

[1]沙福泰. 氮气弹簧缸筒应力分析及壁厚设计[J]. 舰船电子对抗, 2000, 6(6):31-34.

Sha F T. Stress analysis and wall thickness design of nitrogen spring cylinder [J]. Naval Electronic Countermeasure, 2000, 6(6): 31-34.

[2]张明明. 氮气弹簧若干关键件设计与性能分析[D]. 秦皇岛：燕山大学, 2014.

Zhang M M. Design and Performance Analysis of Some Key Parts of Nitrogen Spring [D]. Qinhuangdao: Yanshan University, 2014.

[3]郧鹏,邓汝荣.铝合金气缸筒挤压模改进设计[J].模具工业,2015,41(9):60-63.

Yun P, Deng R R. Improved design of extrusion die for aluminum alloy cylinder [J]. Die Industry, 2015,41(9): 60-63.

[4]王小彬, 梅瑞斌, 范勇,等. TC6合金筒形件反挤压过程变形分析[J]. 热加工工艺, 2013, 42(5):97-100.

Wang X B, Mei R B, Fan Y, et al. Deformation analysis of TC6 alloy cylinder during backward extrusion [J]. Hot Working Process, 2013, 42(5): 97-100.

[5]王自启, 伍太宾, 唐全波,等. 2A12铝合金壳体件热反挤压成形工艺研究[J]. 轻合金加工技术, 2019,(11):43-46.

Wang Z Q, Wu T B, Tang Q B, et al. Study on hot back extrusion process of 2A12 aluminum alloy shell [J]. Light Alloy Processing Technology, 2019, (11): 43-46.

[6]郭欢欢,吴淑芳,朱丽丽.典型杯形件热挤压成形工艺研究[J].汽车零部件,2017,(11):39-43.

Guo H H, Wu S F, Zhu L L. Research on hot extrusion process of typical cup parts [J]. Automotive Parts, 2017, (11): 39-43.

[7]吕炎. 锻模设计手册[M].第2版.北京:机械工业出版社, 2005.

Lyu Y. Forging Die Design Manual [M]. The 2nd Edition. Beijing: China Machine Press, 2005.

[8]郝新, 刘小斐, 潘美玲. P91厚壁无缝钢管反挤压成形过程中成形温度对挤压力影响的数值模拟[J]. 内蒙古工业大学学报:自然科学版, 2011,(3):119-123.

Hao X, Liu X F, Pan M L. Numerical simulation of the influence of forming temperature on extrusion force in the backward extrusion process of P91 thick wall seamless steel tube [J]. Journal of Inner Mongolia University of Technology: Natural Science Edition, 2011, (3): 119-123.

[9]赵长财,郝海滨,胡丽梅.坯料温度不均对高压气瓶反挤压件质量的影响[J].锻压技术,2019,44(6):88-96,172.

Zhao C C, Hao H B, Hu L M. Effect of uneven billet temperature on the quality of high pressure cylinder backward extrusion parts [J]. Forging & Stamping Technology, 2019,44(6): 88-96, 172.

[10]王嘉. 反挤压凸模形状对挤压成形工艺的影响[J]. 模具技术, 2009,(1):24-26.

Wang J. Influence of back extrusion punch shape on extrusion process [J]. Die Technology, 2009, (1): 24-26.

[11]闫红艳,徐超,王志科.自动化闭式反挤压工艺中成形凸模结构设计[J].模具技术,2017,(4):11-15, 31.

Yan H Y, Xu C, Wang Z K. Structure design of forming punch in automatic closed backward extrusion process [J]. Die Technology, 2017, (4): 11-15, 31.

[12]高超平. 某杯形件热挤压凸模结构优化及疲劳寿命研究[D].太原：中北大学,2017.

Gao C P. Structure Optimization and Fatigue Life of Hot Extrusion Punch for a Cup-shaped Part [D]. Taiyuan: North University of China, 2017.

[13]张能. 铝合金药筒热挤压模具优化[D].南京：南京理工大学,2019.

Zhang N. Optimization of Hot Extrusion Die for Aluminum Alloy Cartridge [D]. Nanjing: Nanjing University of Technology, 2019.

[14]王以华.锻模设计技术及实例[M].第1版.北京:机械工业出版社,2009.

Wang Y H. Forging Die Design Technology and Examples [M]. The First Edition. Beijing: China Machine Press, 2009.

[15]蒋鹏.模具标准应用手册锻模卷[M].第1版.北京:中国标准出版社,2017.

Jiang P. Die Standard Application Manual Forging Die Volume [M]. The First Edition. Beijing: China Standards Press, 2017.

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