锻压技术

半截式行李箱外板波纹缺陷分析及工艺优化

英文标题：Ripple defect analysis and process optimization on half-cut trunk

作者：刘晓专朱亮

单位：神龙汽车有限公司

分类号：TH162+.1

出版年,卷(期):页码：2017,42(11):50-54

摘要：

通过对某车型半截式行李箱外板模具开发中遇到的钣金缺陷问题分析，揭示了材料成形中的某些基本规律。鉴于CAE在该问题分析上存在不足，采用塑性力学、工艺学和CAE相结合的方法，探索产生波纹缺陷的根本原因，分析表明，冲压方向上的弦高投影过大是产生变形的根源，而加工硬化是克服变形的难点。借鉴理论分析的结论，制定出有针对性的优化方案，不仅消除了波纹缺陷，还提高了材料利用率。优化后的工艺方案在新项目中得到了成功验证，零件材料利用率提升11%，单件成本降低7.93元。

By analyzing the apprearance defect of the half-cut trunk during die development, some rules of material forming were revealed. Because of the insufficient analysis of CAE, the root cause of ripple defect was explored by combining methods of plasticity mechanics, technology and CAE. The results show that the overlarge projection of the string height in the stamping direction is the source of deformation, and the difficulty for overcoming the deformation is work hardening. A targeted rectification plan is formulated by theoretical analysis, which not only eliminates the defect but also improves the utilization of material. Thus, the process optimization scheme is successfully verified in new projects, and the material utilization increases by 11% and the cost of the single part is reduced by RMB 7.93.

基金项目：

作者简介：刘晓专（1979-），男，学士,工程师 E-mail：liuxiaozhuan@126.com 通讯作者：朱亮（1988-），男，硕士,工程师 E-mail: zhuliang@dpca.com.cn

参考文献：

[1]韦星顺. 基于中国人审美特征的汽车造型设计方法研究[D]. 北京：清华大学, 2013.

Wei X S. The Study of Car Design Method Base on Chinese Aesthetic Characteristic[D]. Beijing:Tsinghua University,2013.

[2]Wei D, Sarria A, Elgindi M. Critical buckling loads of the perfect Hollomon′s power-law columns[J]. Mechanics Research Communications, 2013, 47(3):69-76.

[3]Elgindi M B, Wei D, Liu Y, et al. Buckling and deformation of Hollomon′s power-law tubes[J]. Thin-Walled Structures, 2014, 74(74):213-221.

[4]Ogar P, Gorokhov D. Meyer law application for solving problems of surface plastic deformation by spherical indentation[J]. Applied Mechanics & Materials, 2015, 788:199-204.

[5]谭洪锋, 王萍, 杨雷,等. 应变硬化指数n值与拉伸控制模式及拉伸速率关系的探讨[J]. 物理测试, 2010, 28(6):13-16.

Tan H F, Wang P, Yang L, et al. Discussion on the relationship between strain hardening exponent(n-value) and tensile control mode, as well as tensile rate[J]. Physics Examination and Testing, 2010, 28(6):13-16.

[6]位莉, 李涛, 杨瑞枫. 汽车板抗凹刚度试验[J]. 锻压技术, 2016, 41(11):121-124.

Wei L, Li T, Yang R F. Experimental investigation on dent resistance stiffness for automotive panels[J]. Forging & Stamping Technology, 2016, 41(11):121-124.

[7]王幸运, 梁静, 张小明,等. 半球形壳体旋压工艺与模具设计[J]. 锻压技术, 2017, 42(6).

Wang X Y, Liang J, Zhang X M, et al. Experimental investigation on dent resistance stiffness for automotive panels[J]. Forging & Stamping Technology, 2017, 42(6).

[8]张海龙, 刘劲松, 王守东,等. 304L碟形封头冲压回弹研究[J]. 锻压技术, 2016, 41(1):43-47.

Zhang H L, Liu J S, Wang S D, et al. Research on springback of dished head 304L[J]. Forging & Stamping Technology, 2016, 41(1):43-47.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】