第41卷第12期 Vol. 41No. 12
饭
压技
FORGING & STAMPING TECHNOLOGY
矩形花键冷挤压成形工艺参数多目标优化
阴俊霞，李兴慧，徐伟
（四川工程职业技术学院机电工程系，四川德阳618000）
2016年12月 Dec.
2016
摘要：针对矩形花键冷挤压成形中出现齿形充填不饱满和成形力过大的缺陷间题，以，（坏料直径）、，（坏料初始倒角）， 3，（人模半角）为优化变量，采用响应面法结合有限元数值模拟对花键冷挤压成形工艺参数进行多目标优化。根据实验设计结果分别建立了两个目标函数的二阶响应面模型，方差分析结果表明，模型预测精度高并能够较好地描述两个目标函数关于设计变量的响应。在优化范围内得到矩形花键轴成形最优工艺参数为：，=@48.5mm，%，=20°，%，=15°。将优化后的工艺参数进行实际验证，结果表明：前端塌角量降至0.27mm，最大成形力降至1300kN。工艺试验证明了采用多目标优化得到的工艺参数可以获得合格的产品
关键词：响应面法；矩形花键；冷挤压；齿形前端塌角；挤压成形力 DOI: 10. 13330/j. issn. 1000-3940. 2016. 12. 027
中图分类号：TG376
文献标识码：A
文章编号：1000-3940（2016）12-0155-05
Multi-objective optimization of cold extrusion process parameters for
rectangle spline
Yin Junxia, Li Xinghui, Xu Wei
( Institute of Mechanical and Electrical Engineering, Sichuan Engineering Technical College, Deyang 618000, China)
Abstract : For the problem of insufficient corner filling and excessive forming loads in the process of cold extrusion for rectangle spline, ,(diameter of billet) , , ( billetinitial chamfer) and x, ( die semi-angle) were selected as optimization variables, and the multi-objective optimization of cold extrusion prooess parameters was studied by the response surface method ( RSM) combining with finite element meth-od (FEM). Then, the second-onder response surface models of two objective functions were established based on the experimental design result. The variance analysis results show that the above models are of high prediction accuracy, thuo objective functions related to response of design variable are described clearly. Thus, the optimal process parameters of forming rectangle spline shaft are obtained as , = @48. 5 mm, x2 = 35° and r, = 30°. The optimized process parameters were verified practically- The result shows that the tooth tip collapse angle reduces to 0. 27mm and the maximum forming force reduces to 1300 kN. Experimental result shows that the qualified products can be ob tained by multi-objective optimal process parameters.
Key words : response surface method; rectangle spline; cold extrusion; tooth tip collapse angle; extrusion force
矩形花键因具有较高的承载能力而被广泛应用、传统的机械切削加工方法不仅破坏金属纤维流线并且降低了零件的强度。因此，
矩形花键应尽量采
收稿日期：20160430；修订日期：20160720
基金项目：四川省教育厅科研项目（16ZB0495）作者简介：图俊霞（1983-），女，额士，讲师 E-mail: yinjunxia02@ 163. com
Shao X X, Chen Z N, Dai X J, et al. High-aceuracy two-dimen sional full field strains measurement method using camera array[J]. Sci. Sin Teeh , 2015, 45 (5) : 483 490.
Magee C L. Transformation kinetics, Micro-plasticity and Aging of
181
万方数据Matersitein Fe-3]Ni[D]。
Pittsburgh: Carnegie Institute of
用少无切削的成形工艺替代原切削工艺，
目前，国内外学者针对花键成形方面已开展了大量的研究工作。贾俐俐等[1]采用等挤压比流动模型对矩形花键挤压进行上限分析，讨论了变形程度、凹模型腔尺寸、齿形参数、摩擦因子等对花键成形极限的影响，并给出花键挤压相对应力的经验公式。徐波[3]以大模数六齿矩形花键冷挤压成形为例，探寻不同工艺参数对花键齿形充满程度的影响，定量
Technologie University , 1966.
[19]
曾龙。高强铜点焊接头失效行为及伤真模型研究【D]-北京：清华大学，2013.
Zang L. Susly ce the Mxdlling and Failure Belhavices of Hgh Straigth Sted Spot-Welding Joints [D]- Besijing: Tsinghaa University, 2013