常州机电职业技术学院
毕业设计（论文）
作者：学号：
系部：模具技术系
专业：精密模具设计与制造
题目：冷冲模（带凸缘拉伸件）
指引者：
评阅者：
5月
带凸缘拉深件模具设计
摘要
拉深是运用模具使平板毛坯变成为开口空心零件冲压办法，用拉深工艺可以制成筒形、阶梯形、锥形、抛物面形、盒形和其她不规则形状薄壁零件，其中又以筒形件简朴和多见，而有凸缘筒形件又分为宽凸缘和窄凸缘件。
只有加强拉深变形基本理论研究，才干提供更加精确、实用、以便计算办法，才干对的地拟定拉深工艺参数和模具工作某些几何形状与尺寸，解决拉深变形中浮现各种实际问题，从而，进一步提高制件质量。
在拉深工艺设计时，必要懂得冲压件能否一次拉出，这就引出了拉深系数概念。拉伸系数决定于每次拉深时容许极限变形限度。在多次拉深中，对于宽凸缘拉深件，则应在第一次拉深时，就拉成；零件所规定凸缘直径，而在后来各次拉深中，凸缘直径保持不变。为了保证后来拉深时凸缘不变形，宽凸缘拉深件初次拉入凹模材料应比零件最后拉深某些实际所需材料多3%~5%,这些多余材料在后来各次拉深中，逐渐将减少某些材料挤回到凸缘某些，使凸缘增厚，从而避免拉裂。
核心词：筒形，模具设计，拉深，冲压
Abstract
The extension is a mould to make the plate blank into the stamping method for hollow parts of the opening，thin-walled parts with deep drawing process can be made into a cylinder shape，ladder shaped，cone，parabolic，box and other irregular shapes，and the case of cylindrical parts simple and rare，and flange cylindrical parts is divided into wide flange and narrow flange.
Only by strengthening the basic theory research of deformation calculation method of drawing，can provide more accurate，practical and convenient，can correctly determine the geometry and size of drawing process parameters and working parts of die，to solve the actual problems，drawing deformation in order to further improve the quality of workpieces.
In the process design of deep drawing，must know whether a
stamping out，this leads to the concept of drawing coefficient. Limit drawing coefficient depends on each drawing the allowable deformation degree. Many in the drawing，for wide flange drawing parts，should be in the first drawing，pull into；the diameter of the flange parts required，and after each time depth，the diameter of the flange remain unchanged. In order to ensure the flange without deformation after drawing，wide flange drawing parts for the first time into the die material should be better than the last part of the actual parts drawing materials needed for multiple 3%~5%，these extra materials after various times of deep，gradually will reduce part material out back to the flange portion，the flange thickened，so as to avoid cracking.
Keywords：cylinder，mold design，drawing，stamping
目录
摘要................................................................................................. II Abstract ............................................................................................ III 前言 0
第1章加工零件工艺分析 (2)
1.1零件分析 (2)
1.2冲压件工艺分析 (2)
1.3制定冲压工艺方案 (3)
第2章模具总体设计 (5)
2.1模具类型选取 (5)
2.2操作方式 (5)
2.3卸料、出件方式 (6)
2.3.1卸料方式 (6)
2.3.2出件方式 (6)
第3章模具设计计算 (6)
3.1工艺参数拟定及计算 (6)
3.2拟定拉伸次数 (7)
3.3排样及材料运用率 (8)
3.3.1排样办法 (8)
3.3.2材料运用率 (9)
第4章冲压模具设计 (9)
4.1拟定冲压类型及构造形式 (9)
4.2计算工序压力、选取压力机 (9)
4.2.1落料力 (9)
4.2.2卸料力 (10)
4.2.3拉伸力 (10)
