摘 要

本设计是基于典型轴零件的加工工艺规程及一些工序的专用夹具设计。典型轴零件 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。基准选择以典型轴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：典型轴类零件；工艺；夹具；

Abstract

This designis thespecialfixturefor machiningprocess of forkedplectrum parts and

processdesignbasedon.The mainprocessingsurface forkparts of the plane andaseries of

hole.Ingeneral,ensure themachiningaccuracyof plane thantoensuremachiningaccuracy

holeeasily.Therefore,thedesignfollowsthesurface after thefirst holeof theprinciple.And

theholeandthe planeprocessingclearlydividedintoroughingandfinishingstages of

processingtoensure theaccuracyof thehole.The supportinghole of theinputshaftandthe

outputshaftof thebenchmarkbya shiftingfork asa roughbenchmark,the toptwoholesasa

precision technologybase.Mainprocessingprocess arrangement is tosupporthole

positioningprocessingthetopplane,andthenthe topplane andthe series of supportinghole

locationholeprocessingtechnology. Inadditiontothefollow-upprocesses individual

processes areusedin thetop planepositioningtechnologyandother processingKongand

plane. Thesupportingholeprocessingsystem usingthe method ofcoordinateboring.The

wholeprocess selectionof combinedmachine tool.The specialfixturefixture,clamping

means more choiceof pneumaticclamping,clamping reliable,agencies cannot self-locking,

therefore the production efficiency ishigher,suitablefor high-volume,line processing,can

meet the designrequirements.

Key Words:A typicalshaft parts;technology;fixture;

III

目 录

摘 要........................................................................................................................................II Abstract.....................................................................................................................................III 目 录......................................................................................................................................IV

第1 章 绪论..............................................................................................................................1

1.1夹具概述.......................................................................................................................1

1.2机床夹具的功能...........................................................................................................1

1.3机床夹具的发展趋势...................................................................................................2

1.3.1机床夹具的现状..............................................................................................2

1.3.2现代机床夹具的发展方向..............................................................................3

第2 章 零件的工艺性分析......................................................................................................5

2.1零件的作用...................................................................................................................5

2.2零件的工艺分析...........................................................................................................5

第3 章 工艺规程设计..............................................................................................................6

3.1确定毛坯的制造形成...................................................................................................6

3.2基准的选择...................................................................................................................6

3.3制定工艺路线...............................................................................................................6

第4 章 钻?10孔钻床专用夹具设计......................................................................................8

4.1 问题的提出..................................................................................................................8 4.2 夹具设计......................................................................................................................8

4.2.1 定位基准的选定...............................................................................................8 4.2.2 夹紧力分析.......................................................................................................8 4.2.3 定位误差的分析...............................................................................................9 4.3 夹具设计及操作..........................................................................................................9 第4章 铣槽28H11槽夹具专用夹具设计............................................................................11

IV