支架零件图
摘要
本次夹具研究的对象是支架。支架是起支撑作用的构架，承受较大的力，也具有定位作用，使零件之间保持正确的位置。支架其材料选择HT20-40，该材料机械强度是很好的，并且减震性也相当不错。可以用来铸造生产也可以锻造生产。
本设计主要内容包括支架的加工工艺规程以及车两侧Ф22及Ф26台阶孔专用夹具设计。在设计过程中完成了零件图、毛坯图、夹具装配图和夹具体还有所有非标零件图的绘制及说明书的编写。针对两侧Ф22及Ф26台阶孔的加工设计了一套车床专用夹具，在完成零件结构分析基础上，确定采用CA6140车床对其进行加工。利用圆弧定位体、圆柱销和菱形销满足定位要求，又通过夹紧装置保证加工过程中工件位置不发生变化。
关键词：支架、加工工艺，两侧Ф22及Ф26台阶孔、CA6140
Abstract
The object of this fixture research is the bracket. The bracket is a supporting structure,which bears a greater force and has a positioning function to keep the correct position between the parts. The bracket is made of HT20-40,which has good mechanical strength and good shock absorption. It can be used for casting or forging.
The main contents of this design include the processing procedure of the bracket and the design of the special fixture for the step holes of_22 and_26 on both sides of thevehicle. In the design process, the drawing of parts, blank drawing, fixture assembly drawing and fixture body, aswell as all non-standard parts drawing and instructions are completed. A special fixture for lathe is designed for the processing of step holes on both sides of_22 and_26. Based on the analysis of parts structure, CA6140 lathe is selected to process them. The arc positioning body, cylinder pin and diamond pin are used to meet the positioning requirements, and the clamping device is used to ensure that the position of theworkpiece does not change during the processing.
Keywords: bracket, processing technology, step holes on both sides of_22 and_26, CA6140
目录
摘要I
Abstract II
1引言1
1.1机械加工艺规程的作用1
1.2机床夹具的概述1
1.3专用夹具设计的目的2
2分析零件结构、确定制造形式及生产类型3
2.1分析支架的作用3
2.2分析支架的结构3
2.2.1分析支架组成表面3
2.2.2分析支架加工表面加工要求3
2.2.3分析支架形位公差4
2.3选择支架的材料4
2.4确定制造形式4
2.5确定生产类型5
3支架加工工艺规程的设计7
3.1零件加工基准的选择7
3.1.1粗基准的选择7
3.1.2精基准的选择7
3.2确定加工工艺路线8
3.2.1加工工艺路线方案1和方案2 8
3.2.2确定加工工艺路线9
3.3选择加工机床、装夹夹具、切削刀具及测量量具9
3.4零件加工余量确定10
3.5零件切削用量、加工工时的确定11
4专用夹具的设计22
4.1设计定位方案22
4.2确定定位元件22
4.3设计夹紧方案23
4.4确定夹紧元件23
4.5设计夹具体23
4.7计算车削力24
4.8计算夹紧力24
4.9分析夹具及定位误差25
结论26
致谢27
参考文献28
要做的夹具：加工支架的车床夹具-样图按照这样的来
支架零件图A4
夹具装配图A0
短压板A4
夹具体A1
平衡块A4
圆弧定位体A3
长压板A4
支架毛坯图A4
加工过程卡
夹具设计部分
检验卡
设计所包含文件
字数统计
工序卡
说明书前三页
