网格状厚板件冲裁工艺及模具设计（本科毕业论文设计）.doc

摘 要

现代机械加工业中，许多结构零件采用厚板冲制而成，它能保证零件有足够的强度和刚度，提高零件的使用寿命，提高劳动生产率，从而降低生产成本，因此，厚板冲裁技术作为现代冲裁技术的主要发展方向与开拓项目越来越引人注目。但是厚板冲裁时由于冲头受力条件恶劣，模具寿命过低,而模具寿命是衡量模具技术和经济水平的重要指标。另一方面，对于厚板冲裁的冲件产品，其质量很差，尤其是冲切面参差不齐、尺寸与形位精度低。本论文在查阅大量国内外技术资料的基础上，对厚板冲裁成形方法进行了研究。首先分析研究厚板冲裁成形过程，指出了影响厚板冲裁成形过程的主要因素，再运用模拟仿真软件Deform 3D对冲裁过程进行模拟,由模拟结果得出了斜刃角度,凸、凹模间隙以及刃口小圆角等工艺参数对厚板冲裁成形工艺及成形结果的影响，并得到了这些因素对厚板冲裁成形结果的基本影响规律。最后，通过对厚板冲裁技术的探讨，针对厚板冲裁成形工艺的要求和特点，设计了厚板冲裁成形模具装置，并针对如何减小冲裁力，提高模具寿命，提出了厚板冲裁的凸模设计要点。本文对厚板冲裁成形技术的分析方法和得出的结论能够满足生产应用的基本要求，对于今后该项技术的进一步研究及推广应用有一定的参考意义。


关键词：厚板，冲裁，断裂准则















ABSTRACT

In modern machinery industry, many parts pressed with the thick blank,it can ensure the intension and the rigidity of the parts, improve parts of life, raising labor productivity, thereby lowering the cost of production and, So, the technology of the Blanking of the thick blank is coming to front more and more now. But because of the bad condition of the punch received during the blanking, die life is too low, and die life is a measure of mold technology and the level of important economic indicators. On the other hand,the product of the blanking,it’s quality is very bad,especially the surface of the cutting is ragged,the precision of the size and the figure were very low,and for the parts whose figure were complex,it can not produce now. This paper in the large number of domestic and foreign access to technical information on the basis of the method of forming thick blanking of the study. First,analyse the thick blank cutting process and the forming rule, pointing out that the impact plate blanking the main factors forming process, and then use simulation software for punching Deform 3D process simulation, simulation results obtained by the oblique angle of the blade, convex and concave Die space and cutting edge technology parameters, such as small round plate blanking forming process of forming the results and the impact of these factors and has been punching the plate forming the basic effects of the results. Finally, punching through the thick of technology, blanking plate forming process for the requirements and characteristics of the design of the plate blanking Die devices, and for how to reduce the blanking ability, and improve die life, to the thick Punching the punch plate design features. The analysis method and the conclusion in this paper can fulfil the manufacturing requirement,and has universal guide and reference means to the continual application of investigation and generalization.


Keywords:thick blank,cut,fracture criterion





目 录

中文摘要 ..Ⅰ
ABSTRACT ……..Ⅱ
1绪论 ……..1
1.1厚板冲裁加工概述 ……..1
1.2课题的选题意义及研究目的 ……..2
1.2.1 本文的选题意义 ……..2
1.2.2研究的内容及目的 ……..2
1.3厚板冲裁的研究现状 ……..3
2厚板冲裁加工工艺原理 ……..5
2.1冲裁变形时变形区受力情况分析 ……..5
2.2冲裁变形过程 ……..6
2.3冲裁件质量及其影响因素 ……..7
2.4影响厚板冲裁加工的因素 ……..9
3 Deform有限元分析软件简介 ……..10
3.1引言 ……..10
3.2 DEFORM软件的模块结构 ……..10
3.3 DEFORM软件的主要功能 ……..11
3.4断裂问题的处理 ……..11
4厚板冲裁的有限元模拟分析 ……..14
4.1引言 ……..14
4.2有限元模拟分析 ……..15
4.2.1有限元模型 ……..15
4.2.2常规冲裁工艺的模拟结果分析 ……..16
4.2.3减小冲裁力的办法 ……..18
4.2.4斜刃口斜角对厚板冲裁的影响 ……..19
4.2.5间隙对厚板冲裁的影响 ……..22
4.2.6刃口圆角对厚板冲裁的影响 ……..26
5 模具的设计 ……..29
5.1模具结构 ……..29
5.2工艺计算 ……..29
5.3冲裁模主要零件的设计 ……..31
结论 33
参考文献 34
致谢 36