毕业设计（论文）-拉杆挤压工艺及其模具设计.doc.docVIP

拉杆挤压工艺及其模具设计 摘要 本文的主要内容是对挤压模具的设计。通过对冷挤压模具设计过程的阐述，详细的说明了冷挤压模具的设计步骤﹑设计要领﹑设计细节﹑与注意事项。重点表述了冷挤压实心件﹑空心件的模具设计。 此件为一个长为428mm,最大外径为64mm，中间还有一30mm深，长为342mm的拉杆。考虑到此制件机加工十分困难，因此，选择挤压工艺来成形此制件。另外此制件的材料为42CrMo,硬度很大。因此，本设计的重点是单位挤压力的计算及校核。还有此制件的长为428mm，压力机开模高度及顶出行程的校核也是本设计的主要内容。 本设计采用冷挤压正挤工艺来成形此制件。 模具作为一种高效快捷的加工工具，在现代工业中得到了广泛的应用并日益完善。随着加工技术的提高和先进工具的应用，模具设计越来越显示其独特的创造性和艺术感。在日益完善的过程中，模具设计保留了其永恒不变的一面，如挤压模具的顶出方式﹑固定方法和上下模结构等。因此，可以利用以前加工的模具的大部分结构，在加上一些成形零部件即可组成一套全新的模具。这便最大限度的节约了模具成本，充分利用了现有的资金。本设计的两个成形工艺就是通过更换凸模来完成该制件。 关键词：挤压， 冷挤压， 模具设计， 凸模， 成形工艺 Pull the pole to squeeze the craft and molding tool design Summary The textual and main contents design squeeze molding tool. Pass right cold squeeze the describe that molding tool design process, expatiation cold squeeze the molding tools design step the ﹑ design the main theme ﹑ the design the details ﹑ and announcements. Point form cold squeeze the molding tool design for. Hollow piece of solid piece. This for a long for 428 mms, biggest and outside path is 64 mm, in the center still reach a 30 mms are deep, long for 342 pulling of mms pole.In consideration of this make a machine to process very difficult, therefore, the choice squeeze the craft. Another this make the pieces material to 42 CrMo, degree of hardness very big. Therefore, the point of this design is an unit to squeeze the calculation and the examination of the dint.Still have this to make a examination for of longly for 428 mms, pressure machine open the mold high degree and crest to out the route of travel is also main contents this design. This design the adoption is cold to squeeze the positive craft to take shape this to make the piece. The molding tool be used ases an efficiently fast process the tool, and got the extensive application in the modern industry and increasingly perfect. A long with the exaltation that application, molding tool design that processing technology more and more show its special creation to feel with art with the advanced tool .At increasingly insid