二级减速器箱座的镗三个轴承孔夹具设计及机械加工工艺规程含3张CAD图+说明书

A0箱体零件图

减速器箱座机械加工工艺规程及镗夹具设计
摘要
本文是对减速器箱座进行图样分析后，再根据减速器箱座材料性能、精度要求、结构特点以及加工类型进行减速器箱座的机械加工工艺过程的设计，并设计一主要工序的专用夹具。
减速器箱座的主要加工内容是表面和孔。其加工路线长，加工时间多，加工成本高，零件的加工精度要求也高。按照机械加工工艺要求，遵循先面后孔、先主后次的原则，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。基准选择底面作为粗基准，以底面与两个工艺孔作为精基准，确定了其加工的工艺路线和加工中所需要的各种工艺参数。
在零件的夹具设计中，主要是根据零件加工工序要求，分析应该限制哪几个自由度，进而再根据零件的表面特性选择定位元件，再分析所选定位元件能否限制应限的自由度。确定了定位元件后还要选择夹紧元件，最后就是确定专用夹具的结构形式。
关键词：减速器箱体；加工工艺；设计；夹具
Abstract
In this paper, the design of the mechanical processing process of the reducer box seat is carried out according to the material performance, precision requirements, structure characteristics and processing types of the reducer box seat, and a special fixture for the main process is designed.
The main processing contents of reducer box seat are surface and hole. It 's processing route is long, processing time is high, processing cost is high, and the machining accuracy of parts is also high. According to the requirements of the machining process, the principle of the first face and rear hole is followed, and the machining of the hole and the plane is clearly divided into the rough machining and finishing stage to ensure the machining precision. The base surface is used as the base reference, and the base surface and the two process holes are used as the precision datum. The process route and the process parameters needed in the processing are determined.
In the fixture design of the parts, it is mainly based on the requirements of the parts processing procedure, which is to analyze which degree of freedom should be limited, and then select the positioning element according to the surface characteristics of the parts, and then analyze whether the selected location element can limit the degree of freedom. After fixing the positioning element, the clamping element should be selected. Finally, the structural form of the special fixture is determined.
Key words：reducer box；processing technology；process；special fixture
目录
1绪论1
1.1本课题的研究内容和意义1
1.2国内外的发展概况1
1.3本课题应达到的要求2
2零件的分析3
2.1零件的作用3
2.2零件的工艺分析3
3工艺规程设计5
3.1确定毛坯的制造形式5
3.2定位基准的选择5
3.2.1粗基准的选择5
3.2.2精基准的选择6
3.3拟定工艺路线6
3.3.1划分加工阶段6
3.3.2安排加工顺序7
3.3.3拟定加工工艺路线7
3.4机械加工余量、工序尺寸及毛坯尺寸的确定9
3.5确定切削用量及基本工时10
4.镗孔专用夹具设计30
4.1工件定位分析30
4.2夹紧机构的确定31
4.3定位误差分析31
4.4切削力及夹紧力的计算32
4.5夹具操作简要说明34
总结35
参考文献36
致谢37

A0毛坯零件合图

A0夹具装配图

确定切削用量及基本工时

设计所包含文件

字数统计

加工过程卡

夹具设计部分

箱座工序卡