后钢板弹簧吊耳的设计.zip

后钢板弹簧吊耳的设计


摘   要

本次设计是对后钢板弹簧吊耳零件的加工工艺规程及一些工序的专用夹具设计。后钢板弹簧吊零件的主要加工表面是平面及孔。由加工工艺原则可知，保证平面的加工精度要比保证孔的加工精度容易。所以本设计遵循先面后孔的原则。并将孔与平面的加工明确划分成粗加工和精加工阶段以保证加工精度。基准选择以后钢板弹簧吊耳大外圆端面作为粗基准，以后钢板弹簧吊耳大外圆端面与两个工艺孔作为精基准。主要加工工序安排是先以后钢板弹簧吊耳大外圆端面互为基准加工出端面，再以端面定位加工出工艺孔。在后续工序中除个别工序外均用端面和工艺孔定位加工其他孔与平面。整个加工过程均选用组合机床。

关键词：后钢板弹簧吊耳，加工工艺，专用夹具

After Hanging Ear Leaf Spring Design

Abstract
This design is to the rear spring shackle components processing technological process and some working procedure unit clamp design.The rear spring hangs the components the main processing surface is the plane and the hole.May know by the processing craft principle, the guarantee plane processing precision must be easier than the guarantee hole processing precision.After therefore this design deference first surface hole principle.And is clear about the hole and the plane processing divides the rough machining and the precision work stage guarantees the processing precision.The datum chooses later spring shackle big outer annulus end surface to take the thick datum, later the spring shackle big outer annulus end surface will take the fine datum with two craft holes.The main processing working procedure arrangement first later the spring shackle big outer annulus end surface mutually processes the end surface for the datum, then will process the craft hole by the end surface localization.Uses the end surface and the craft hole localization in the following working procedure besides the individual working procedure processes other and the plane.The entire processing process selects the aggregate machine-tool.

Keywords: leaf spring, after hanging ears, processing technology, a dedicated fixture

目         录

绪论…………………………………………………………………………………1
  1. 零件的分析………………………………………………………………………… 2
  2. 工艺规程设计……………………………………………………………………… 3
2．1 确定毛坯的制造形式………………………………………………………3
2．2 基面的选择…………………………………………………………………3
2．2．1 粗基准的选择………………………………………………………3
2．2．2 精基准的选择………………………………………………………3
2．3 制订工艺路线………………………………………………………………3
2．4 机械加工余量、工序尺寸及毛坯尺寸的确定……………………………5
2．5 确定切削用量及基本工时…………………………………………………7
2．5．1.加工条件……………………………………………………………7
2．5．2.计算切削用量………………………………………………………7
  3. 夹具设计………………………………………………………………..……………13
3．1 问题的提出………………………………………………….………………13
3．2 卡具设计……………………………………………………….……………13
3．2．1．定位基准的饿选择…………………………………………………13
3．2．2．切削力和夹紧力的计算………………………………………………13
3．2．3．定位误差分析………………………………………………………13
3．2．4．夹具设计及操作的简要说明………………………………………14
4. 参考文献 …………………………………………………………………………15