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
基于数值模拟的局部变过盈量组合凹模研究
英文标题:Research on combined die with local changeable interference based on numerical simulation
作者:陈莹莹 冯文杰 杨创创 刘吉 
单位:重庆理工大学 
关键词:组合凹模 均匀变过盈量 局部变过盈量 模具寿命 数值模拟 
分类号:TG376
出版年,卷(期):页码:2017,42(12):109-113
摘要:

 借助有限元软件分析了预紧力状态下,采用均匀变过盈量设计的组合凹模能有效减小消气带区齿根的切向压应力,以避免线切割时模具的破损,但模芯成形区齿根的切向压应力也相应减小,无法完全抵消挤压时在成形区产生的拉应力,从而影响了模具的使用寿命。为解决这一问题,提出局部变过盈量组合凹模的设计方法,即在模芯上部采用均匀过盈量,下部采用变过盈量的设计,以保证预紧状态下模芯成形区齿根切向压应力不被减小,而只减小消气带齿根的切向压应力,有效提高了模具寿命。以模数m=4的某齿轮为研究对象,通过数值模拟,确定了锥角γ″=1°,γ=1.2°,均匀过盈量区高度h=21 mm 等参数进行实际生产,与均匀变过盈量模具寿命相比,提高了35%左右。

 The combined die with uniform changeable interference under the preload condition was designed by the finite element software. This combined die could effectively reduce tangential compressive stress of gear root in the getter zone to avoid the die damage with wire cutting. But the tangential compressive stress of gear root in forming zone of die core reduced accordingly, which could not fully offset the tensile stress during extrusion forming, and the die life was affected. In order to solve this problem, the design method of local changeable interference on combination die was put forward, namely, uniform interference was applied on the upper part of die core, while changeable interference was used on the lower part of die core. Therefore, the tangential compressive stress of gear root in forming zone of die core under the preload condition was not reduced, and the tangential compressive stress of gear root in the getter zone was only decreased to improve the die life. Furthermore, for the gear with modulus of 4, the cone angle γ″=1°  and  γ′″=1.2° as well as the height 21 mm of uniform interference zone were determined respectively by numerical analysis, and the actual production was carried out. Thus, for the combined die with uniform changeable interference,the die life was prolonged by obout 35%.

 
基金项目:
重庆市教委科学技术研究资助项目(KJ1400944);重庆市科委资助项目(cstc2014yykfA60001)
作者简介:
作者简介:陈莹莹(1979-),女,硕士,副教授 E-mail:chenyy@cqut.edu.cn 通讯作者:冯文杰(1964-),男,硕士,教授 E-mail:wjfeng@cqut.edu.cn
参考文献:

 
[1]杨长顺. 冷挤压模具设计[M]. 北京: 国防工业出版社,1994.


 

Yang C S.Die Design for Cold Extrusion[M]. Beijing: National Defense Industry Press,1994.

 


[2]王强, 昌木松, 陈忠家, 等. 圆柱直齿轮挤压组合凹模的优化设计[J]. 合肥工业大学学报:自然科学版, 2008, 31(9): 1415-1418.

 

Wang Q, Chang M S, Chen Z J, et al. Optimum design of combined extrusion die for cylindrical spur gear [J]. Journal of Heifei of Technology : Natural Science, 2008, 31(9):1415-1418.

 


[3]敖文刚, 伍太宾. 齿形组合凹模等强度分析及优化[J]. 塑性工程学报, 2016, 23(5): 36-43.

 

Ao W G, Wu T B. Unified strength analysis and optimization of combined die for spur gear [J]. Journal of Plasticity Engineering, 2016, 23(5): 36-43.

 


[4]鲁志兵, 王成勇, 张心怡,等. 筒形件冷挤压凹模强度设计及结构优化[J]. 中国机械工程, 2015, 26(23):3228-3233.

 

Lu Z B, Wang C Y, Zhang X Y, et al. Strength design and structural optimization of cold extrusion die for cylindrical workpieces [J]. China Mechanical Engineering, 2015,26(23):3228-3233.

 


[5]杨丰钰, 胡成亮, 赵震,等. 自增强理论在线性强化材料组合凹模设计中的应用[J]. 锻压技术, 2016, 41(6):78-82.

 

Yang F Y, Hu C L, Zhao Z, et al. Application of autofrettage theory in the design of linear strengthening material combined die [J]. Forging & Stamping Technology, 2016,41(6):78-82.

 


[6]刘丹,刘华,王伟钦,等. 直齿圆柱齿轮冷挤压可控运动凹模成形工艺[J].锻压技术,2016,41(9):84-87.

 

Liu D, Liu H, Wang W Q, et al. Forming technology of controlled movable die of spur gear in cold extrusion[J].Forging & Stamping Technology, 2016,41(9):84-87.

 


[7]冯文杰, 冉力, 夏泽雨,等. 直齿圆柱齿轮冷挤压变过盈量组合凹模设计方法[J]. 锻压技术, 2017, 42(2):104-109.

 

Feng W J, Ran L, Xia Z Y, et al. Design on changeable interference combined die of spur gear in cold extrusion [J]. Forging & Stamping Technology, 2017, 42(2):104-109.

 


[8]陈莹莹, 冯文杰, 况智允,等. 基于粒子群算法的大模数齿轮冷挤压变过盈量组合凹模优化设计[J]. 锻压技术, 2017, 42(8): 122-128.

 

Chen Y Y, Feng W J, Kuang Z Y, et al. Optimization design of cold extrusion changeable interference combined die for large module gear based on particle swarm optimization [J]. Forging & Stamping Technology,2017, 42(8):122-128.

 
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