设计简介
本设计是基于车床拨叉零件的加工工艺规程及一些工序的专用夹具设计。零件的主要加工表面是平面和孔系。一般来说，保证平面的加工精度要比保证加工精度容易。因此，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。主要加工工序是第一个支持孔定位加工出顶平面，然后顶平面和孔的位置的孔加工工艺配套系列。在后续工序中除与顶平面定位技术和加工其他孔与平面的个体的过程。利用坐标镗削加工孔。一般整个工艺的选择。专用夹具的夹具，夹紧方式多选用气动夹紧，夹紧可靠，机构不能自锁，因此生产效率高，适合于大批量、流水线上加工，能够满足设计要求。
关键词 车床拨叉类零件；工艺；夹具；
Abstract：
This design is the special fixture for machining process of fork group and process design based on. The main processing surface steering lever parts of the plane and the holes. In general, the plane guarantee precision machining is easier than to guarantee the machining accuracy. Therefore, the design follows the surface after the first hole principle. And the hole and the plane processing clearly divided into roughing and finishing stages of processing to ensure accuracy. The main process is the first locating hole processing the top plane, and then the hole processing technology series top plane and the position of the hole. Process in addition to individual and the top plane positioning technology and other processing of the hole and the plane is in in the follow-up process. By using the coordinate boring hole. In general the whole process selection. Fixture fixture, clamping means more choice of pneumatic clamping, clamping reliable, agencies can not lock, therefore the production efficiency is high, suitable for large batch, line processing, can meet the design requirements.
Keywords：fork group;technology; fixture;
目 录
1 前言 1
1.1简介 1
1.2设计目的 1
2 零件的分析 1
2.1零件的作用 1
2.2零件的工艺分析 2
2.2.1孔的加工 2
2.2.2面的加工 2
3 工艺规划设计 3
3.1毛坯的制造形式 3
3.2基面的选择 3
3.2.1粗基准的选择 3
3.2.2精基准的选择 3
3.3工艺路线的拟定 3
3.3.1工艺路线方案 3
3.3.2工艺方案的确定 4
3.4毛坯尺寸及其加工余量的确定 4
3.4.1两侧面毛坯尺寸及加工余量计算 4
3.4.2小头孔毛坯尺寸及加工余量计算 5
3.5确定各工序切削用量及基本工时 5
4 拨叉成组车夹具 13
4.1 车床夹具设计要求说明 13
4.2车床夹具的设计要点 13
4.3 定位机构 15
4.4夹紧机构 15
4.5零件的车床夹具的加工误差分析 15
4.6 确定夹具体结构尺寸和总体结构 16
4.7 零件的车床专用夹具简单使用说明 17
5 本章小结 18
总 结 19
参考文献 20
致 谢 21
关键词 车床拨叉类零件；工艺；夹具；
Abstract：
This design is the special fixture for machining process of fork group and process design based on. The main processing surface steering lever parts of the plane and the holes. In general, the plane guarantee precision machining is easier than to guarantee the machining accuracy. Therefore, the design follows the surface after the first hole principle. And the hole and the plane processing clearly divided into roughing and finishing stages of processing to ensure accuracy. The main process is the first locating hole processing the top plane, and then the hole processing technology series top plane and the position of the hole. Process in addition to individual and the top plane positioning technology and other processing of the hole and the plane is in in the follow-up process. By using the coordinate boring hole. In general the whole process selection. Fixture fixture, clamping means more choice of pneumatic clamping, clamping reliable, agencies can not lock, therefore the production efficiency is high, suitable for large batch, line processing, can meet the design requirements.
Keywords：fork group;technology; fixture;
目 录
1 前言 1
1.1简介 1
1.2设计目的 1
2 零件的分析 1
2.1零件的作用 1
2.2零件的工艺分析 2
2.2.1孔的加工 2
2.2.2面的加工 2
3 工艺规划设计 3
3.1毛坯的制造形式 3
3.2基面的选择 3
3.2.1粗基准的选择 3
3.2.2精基准的选择 3
3.3工艺路线的拟定 3
3.3.1工艺路线方案 3
3.3.2工艺方案的确定 4
3.4毛坯尺寸及其加工余量的确定 4
3.4.1两侧面毛坯尺寸及加工余量计算 4
3.4.2小头孔毛坯尺寸及加工余量计算 5
3.5确定各工序切削用量及基本工时 5
4 拨叉成组车夹具 13
4.1 车床夹具设计要求说明 13
4.2车床夹具的设计要点 13
4.3 定位机构 15
4.4夹紧机构 15
4.5零件的车床夹具的加工误差分析 15
4.6 确定夹具体结构尺寸和总体结构 16
4.7 零件的车床专用夹具简单使用说明 17
5 本章小结 18
总 结 19
参考文献 20
致 谢 21
