风镐变速器箱体-零件图
风镐变速器箱体零件的工艺规程制订及夹具设计
摘要
本设计是风镐变速器箱体零件的加工工艺规程及一些工序的专用夹具设计。风镐变速器箱体零件的主要加工表面是平面及孔系。一般来说，保证平面的加工精度要比保证孔系的加工精度容易。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孔系加工精度。基准选择以变速箱箱体的输入轴和输出轴的支承孔作为粗基准，以顶面与两个工艺孔作为精基准。主要加工工序安排是先以支承孔系定位加工出顶平面，再以顶平面与支承孔系定位加工出工艺孔。在后续工序中除个别工序外均用顶平面和工艺孔定位加工其他孔系与平面。支承孔系的加工采用的是坐标法镗孔。整个加工过程均选用组合机床。夹具选用专用夹具，夹紧方式多选用气动夹紧，夹紧可靠，机构可以不必自锁。因此生产效率较高。适用于大批量、流水线上加工。能够满足设计要求。
关键词：变速箱;加工工艺;专用夹具
Abstract
This design is the process specification of the pneumatic gearbox box parts and the special fixture design for some processes. The main machined surface of the gearbox housing parts of the pneumatic pick is the plane and hole system. Generally speaking, ensuring the machining accuracy of the plane is easier than ensuring the machining accuracy of the hole system. Therefore, this design follows the principle of the first face and the rear hole. The processing of holes and planes is clearly divided into rough machining and finishing stages to ensure the accuracy of hole processing. The reference selection is based on the input shaft of the gearbox and the supporting hole of the output shaft as the rough datum,with the top face and two processing holes as the precise datum. The main processing procedure is to locate the top planewith the supporting hole system first, then locate the hole by positioning the top plane and supporting holes. In the following processes, except for individual processes, other holes and planes are positioned by using the top plane and process holes. The hole supporting system is machined by coordinate method. Combined machine tools are used in thewhole process. The fixture is specially clamped, the clamping mode is mostly pneumatic clamping, and the clamping is reliable, and the mechanism can not be self locked. Therefore, the production efficiency is high. It is suitable for large batch and assembly line processing. It can meet the design requirements.
Keywords: Gearbox machining technology ; special-purpose ; clamping apparatus
目录
摘要ⅰ
Abstractⅱ
绪论1
1风镐变速器箱体加工工艺规程设计16
1.1零件的分析16
1.1.1零件的作用16
1.1.2零件的工艺分析16
1.2箱体加工的主要问题和工艺过程设计所应采取的相应措施17
1.2.1孔和平面的加工顺序17
1.2.2孔系加工方案选择17
1.3变速箱箱体加工定位基准的选择20
1.3.1粗基准的选择20
1.3.2精基准的选择20
1.4变速箱箱体加工主要工序安排21
1.5机械加工余量、工序尺寸及毛坯尺寸的确定22
2专用夹具设计27
2.1加工工艺孔夹具设计28
2.1.1定位基准的选择28
2.1.2切削力的计算与夹紧力分析28
2.1.3夹紧元件及动力装置确定29
2.1.4钻套、衬套、钻模板及夹具体设计30
2.1.5夹具精度分析32
2.1.6夹具设计及操作的简要说明33
参考文献35
致谢36
钻工艺孔夹具装配图
风镐变速器箱体毛坯图
工艺过程卡
钻工艺孔夹具钻模板
1字数
3设计所包含文件
4夹具设计部分
2说明书前三页
