文档介绍：毕业设计
设计题目:差速器壳体钻Φ20孔和8×
姓名
学院(系)机械电子工程系
专业机械设计制造及其自动化
年级 09级
指导教师
2013 年 6 月 14 日
摘要
机械加工工艺设计是一门融理论性、科学性、实用性和经济性为一体的设计,它涉及的知识面广,决定着零件的加工质量、生产成本、产品效益及单位的经济效果。因而,正确分析零件的功用,恰当合理地制定工艺规程;选定机床、刀具、量具;夹具设计;确定加工余量、切削用量、对提高产品质量、劳动生产率、减轻劳动强度等具有重要的意义。
近年来,三农问题在我国占据着重要的地位,随着科学的进步,社会的发展,拖拉机在农业生产中越来越广泛,而差速器是拖拉机的重要部件,其壳体的结构及加工精度直接影响差速器的正常工作,因此研究差速器的加工方法和工艺的编制是十分必要和有意义的。本次设计主要内容是设计钻床夹具,。第一套夹具是用V形块和带有V形块的专用压板将壳体的两端分别夹紧,用支承钉和可调支承分别对限制X向和旋转自由度,有V形块与底面的平等度误差。第二套夹具采用一面两销制定位夹紧方案利用分度盘将工件的8个孔分别加工,但应考虑夹具体轴孔与底面的垂直度误差。
关键词:差速器壳体;工艺规程;夹具;设计;误差
ABSTRACT
Machining technology design is a design that includes theoretical, scientific, operating characteristic and economic. It involved wide knowledge, decided the working quality, manufacture cost, products benefit and economic effect of one product. Thus, correct analyses the function of the parts, pile technological procedure, selected machine, tool, measuring implement, design clamp, define allowance, cutting quantity, have important meaning for improving products quality, labour productivity, reduce labour intensity etc.
These years,the problem of agriculture is ing more and more with social development motor vehicle production and life in an increasingly wide differential device is an important ponent sand its interior structure and processing precision differential device directly affect the normal work study differential device case processing methods and techniques of preparation is necessary and meaningful. The current design of the main elements is the design of drilling jig , the need for parts than20hole and milling face milling. The first set of fixture is with V block and a v-shaped block respectively clamped on both ends of the shell of the special clamp, with support and the adjustable supporting X to the restrictions and rotational degrees of freedom respectively, a V block and the underside of the equality degree of error. Second fixture adopts a