夹具三维装配图
摘要
随着机床加工精度的提高，为了降低定位误差，提高加工精度，对夹具的制造精度要求相应提高。为了适应不同行业的需要和经济性，夹具有不同的型号，以及不同档次的精度标准供选择。夹具的通用性直接影响其经济性，采用模块、组合式的夹具系统只有夹具系统的可重组性、可重构性及可扩展性功能强，应用范围广，通用性好，夹具利用率高，元件的功能强，使得夹具的通用性好，元件少而精，配套的费用低，经济使用才有推广的价值。
本设计是结合目前实际生产中，通用夹具不能满足生产要求，而专门设计的一种铣床夹具，主要包括夹具的定位方案，夹紧方案，夹具体与定位键的设计及加工精度等方面的分析。
该夹具具有良好的加工精度，针对性强，主要用于拨叉铣40×28上平面零件工序的加工。本夹具具有夹紧力装置，具备现代机床夹具所要求的高效化和精密化的特点，可以有效的减少工件加工的基本时间和辅助时间，大大提高了劳动生产力，有效地减轻了工人的劳动强度。
关键词：拨叉；机床夹具；定位；工序；夹紧力
Abstract
With the improvement of machining accuracy of machine tools, in order to reduce the positioning error and improve the machining accuracy, the manufacturing accuracy of fixture is required to be improved accordingly. In order to meet the needs and economy of different industries, clamps have different models and different grades of accuracy standards for selection. The generality of fixture directly affects its economy. Only the modular and combined fixture system has strong function of reconfigurability, reconfigurability and expansibility, wide application range, good generality, high utilization rate of fixture and strong function of components, which makes the fixture have good generality, few and precise components, low cost of supporting, and economic use has the value of promotion.
This design is a kind of milling machine fixture specially designed in combination with the current actual production, which can not meet the production requirements of the general fixture. It mainly includes the positioning scheme, clamping scheme, clamp specific and positioning key design and processing accuracy analysis of the fixture.
The fixture has good machining accuracy and strong pertinence. It is mainly used for the machining of shift fork milling 40 × 28 upper plane parts. The fixture has a clamping force device, which has the characteristics of high efficiency and precision required by modern machine tool fixture. It can effectively reduce the basic time and auxiliary time of workpiece processing, greatly improve the labor productivity and effectively reduce the labor intensity of workers.
Key words: shift fork; machine tool fixture; positioning; process; clamping force
目录
摘要1
Abstract 2
第1章绪论1
第2章零件的分析2
2.1零件的分析2
2.1.1零件的作用2
2.1.2零件的工艺分析2
2.2工艺规程设计2
2.3制定工艺路线。 3
2.4机械加工余量。 4
2.5确定切削用量及基本工时。 5
第3章铣40×28上平面夹具设计13
3.1.夹具结构设计14
3.1.1定位机构14
3.1.2夹紧机构15
3.2机床夹具的总体形式16
3.2.1确定夹具体： 17
3.2.2确定联接体： 17
3.2.3夹具体的总体设计图: 17
3.3绘制夹具零件图18
3.4绘制夹具装配图18
3.5误差分析21
3.5.1定位误差21
3.5.2产生定位误差的原因22
3.6定位误差的计算22
结论24
致谢25
参考文献26
三维零件图
A夹具装配图
零件图-新国标
拨叉831005毛坯图
夹具非标零件-花键轴
夹具非标零件-夹紧盖
夹具体
毛坯图-方案2
拨叉831005零件图
加工过程卡
设计所包含文件
字数统计
夹具设计部分
工序卡
