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Surface Waviness and Wrinkling in Sheet Metal Forming

金属板材成形中的表面波纹和起皱

基本信息

批准号：
8712266
负责人：
Shyam Samanta
金额：
$ 26.41万
依托单位：
Regents of the University of Michigan - Ann Arbor
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1987
资助国家：
美国
起止时间：
1987-11-15 至 1990-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8712266&HistoricalAwards=false
关键词：
Surface Waviness Wrinkling Sheet Metal

项目摘要

The objective of this research proposal is to gain an insight into the relatively unexplored area of surface waviness (or wrinkling) which can occur during sheet metal forming, to obtain a fundamental understanding of the influence of material parameters on those process parameters that cause surface waviness, and to provide technical guidelines for avoiding such defects in forming high-strength materials. The research will include: (1) Experimental studies on rectangular and square punch stretching of peripherally clamped sheet metals, (2) Analysis of rectangular and square punch stretching, (3) Study of various constitutive equations and establishment of those best suited for predicting surface waviness/wrinkling in sheet metal, (4) Experimental determination of biaxial strength of selected materials, and (5) Establishment of process design guidelines for forming panels without surface waviness and testing those guidelines on an actual stamping process. Surface waviness is one of the main types of failures in the sheet metal forming process which is a manufacturing process employed in many industries. The proposed research should lead to a better understanding of this failure problem and result in an improvement in the sheet metal forming process. This research will be conducted jointly by two universities with collaboration from a national laboratory and an industrial company.

这项研究的目的是获得一个深入了解相对未开发的表面波纹区域 (or在金属板成形过程中可能发生的变形，对材料的影响有一个基本的了解这些工艺参数上的参数，波度，并提供技术准则，以避免这种形成高强度材料的缺陷。这项研究将包括：（1）矩形和方形冲头的实验研究周边夹紧的金属板拉伸，（2）分析矩形和方形凸模拉伸，（3）各种凸模拉伸的研究本构方程和建立那些最适合预测金属板中的表面波纹度/起皱，（4）双轴向强度的试验测定（5）制定工艺设计指南，形成没有表面波纹的面板并测试这些面板实际冲压过程的指导方针。表面波纹度为板料成形中的主要失效形式之一这是一个制造过程中采用的许多行业拟议的研究应该会导致一个更好的理解这个失败的问题，并导致金属板成形工艺的改进。本研究将由两所大学合作进行一个国家实验室和一个工业公司。