毕业设计--连杆工艺及连杆大头螺栓底孔气动钻夹具设计

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1、 本科毕业论文 连杆工艺及连杆大头螺栓底孔气动钻夹具 设计 院（系）名 称：华科学院 专 业 名 称 ：机械设计制造及其自动化(机制) 二一二年五月 BACHELORS DEGREE THESIS OF DONGHUW COLLEGE WUHAN UNIVERSITY Rod Production Process and Drill bolt hole special jig design College：College of Engineering and Technology Subject：Mechanical Design and Manufacture and Automation

2、Name： Directed by ： May 2012 摘摘 要要 连杆是柴油机的主要传动件之一，本文主要论述了连杆的加工工艺及其夹具 设计。连杆的尺寸精度、形状精度以及位置精度的要求都很高，而连杆的刚性比 较差，容易产生变形，因此在安排工艺过程时，就需要把各主要表面的粗精加工 工序分开。逐步减少加工余量、切削力及内应力的作用，并修正加工后的变形， 就能最后达到零件的技术要求。安排工艺进程时，就要把各主要表面的粗、精加 工工序分开，即把粗加工安排在前，半精加工安排在中间，精加工安排在后面。 这是由于粗加工工序的切削余量大，因此切削力、夹紧力必然大，加工后容易产 生变形。粗、精加工分开后，粗加

3、工产生的变形可以在半精加工中修正；半精加 工中产生的变形可以在精加工中修正。本课题夹具设计为钻连杆螺栓孔专用夹具 设计。 关键词: 加工工艺；加工余量；尺寸链；夹具设计 ASTRACT The connecting rod is one of the main driving medium of diesel engine, this text expounds mainly the machining technology and the design of clamping device of the connecting rod. The precision of size, the p

4、recision of profile and the precision of position , of the connecting rod is demanded highly , and the rigidity of the connecting rod is not enough, easy to deform, so arranging the craft course, need to separate the each main and superficial thick finish machining process. Reduce the function of pr

5、ocessing the surplus , cutting force and internal stress progressively , revise the deformation after processing, can reach the specification requirement for the part finally , Arrange technology process, the main surface coarse, finishing process, the former, half in balancing arrangement in the mi

6、ddle, finish machining precision arrangement in behind. This is due to the rough machining processes, thus cutting allowance of cutting force, clamping force inevitable large deformation, processed easily. After finishing separate coarse, moldings, deformation of finishing in half, Half of machining deformation of finishing in. This fixture design for drill connecting bolt hole special jig design. Keyword: Processing technology；Limits.but；Dimension chain；Fixture design 目 录