叉片冲压工艺分析及模具设计

机械设计制造及其自动化论文，论文编号:JX1039  论文字数:18696.页数:40

摘   要
 冲压--是在室温下，利用安装在压力机上的模具对材料施加压力，使其产生分离或塑性变形，从而获得所需零件的一种压力加工方法。而冲压模具是其生产必不可少的工艺装备，是技术密集型产品。
 本文对冲压件即叉片的工艺进行了详细分析，决定采用冲压的部位是叉片的外形及矩形孔。通过综合考虑工件的生产纲领和工艺性，确定采用倒装式复合模结构进行冲裁，落料凹模和冲孔凸模装在复合模的上方，泄料装置和凸凹模装在复合模的下方，一次冲裁后，工件通过推件装置从凹模中被推出，而废料则从凸凹模掉落。在模具各零部件的选择中，要对冲压力、凸模及凹模的刃口尺寸进行计算，要通过查询模具设计手册及经验确定各个零部件的尺寸规格，并对凸模的强度进行校核。最后，绘制模具总图及各个零件图。

关键词：冲压；叉片；工艺分析;模具设计

Abstract
 Stamping die - in cold stamping process and material (metallic and non-metallic) into parts (or semi-finished) is a kind of special craft equipment, called cold stamping mould (known as cold die). Stamping is at room temperature, pressure machine using installed in the mold of material, make its produce pressure separation or plastic deformation, and obtain a pressure parts processing methods.
 Based on the stamping process of fork is analysed in detail, decided to adopt the stamping part is the fork of the rectangular shape and hole. Through the comprehensive consideration of the workpiece, the production process and adopt composite modulus structure inversion type blanking, blanking dies.the and punching punch in the composite modulus, feeding and upper punch mould in the composite modulus, once after cutting, workpiece through pushing a device was introduced from the concave die, and waste from intensive drops. In the mould parts in the choice to hedge pressure, punch and die, the size of the calculated through the manual and experience in mould design inquires the size of each component determined, and the strength of the punch. Finally, the drawing die layout and various parts graph.

Keywords：Stamping; Fork slice; Process analysis; Mould design.

目  录
中文摘要i
英文摘要..ii
第一章  绪论. 1
 1.1关于叉片..1
 1.2冲压技术的现状及发展方向.2
 1.3课题研究的主要内容和方案.5
 1.3.1课题研究的主要内容..5
 1.3.2课题研究的方案6
 1.4研究课题的主要目标和特色.6
第二章  叉片冲压工艺分析及设计计算. 7
 2.1叉片冲压工艺分析7
 2.2确定最佳工艺方案8
 2.3确定模具的结构形.. 9
 2.4冲裁间隙.10
 2.5叉片排样与搭边.11
 2.5.1 搭边.. 11
 2.5.2 材料的利用率 11
 2.6冲压力计算..12
 2.6.1冲裁力计算12
 2.6.2卸料力、推件力和顶出力13
 2.7模具压力中心计算..14
 2.8凸、凹模刃口尺寸计算.15
 2.8.2凸、凹模刃口尺寸计算的方法..15
 2.8.3凸、凹模刃口尺寸计算..17
第三章  叉片冲压模具零部件的设计.. 19
 3.1凹模..19
 3.1.1凹模的类型19
 3.1.2凹模刃口形式.19
 3.1.3凹模外形尺寸的确定.19
 3.2凸模..21
 3.2.1凸模的类型21
 3.2.2凸模结构形式.21
 3.2.3凸模强度校核.22
 3.3凸模固定板..23
 3.4凸凹模24
 3.5凸凹模固定板25
 3.6 垫板 .25
 3.7定位零件.27
 3.8卸料装置.27
 3.9推件装置.29
 3.10紧固件..30
 3.11模架及其零件..31
 3.11.1 模架和模座.. ..31
 3.11.2 模柄. 31
 3.11.3导柱与导套..32
 3.12 压力机的选择. 32
 3.12.1压力机选用原则.32
 3.12.2曲柄压力机规格选择32
第四章  结论. 34
参考文献.. 35
致谢 36