【温馨提示】 购买原稿文件请充值后自助下载。
[全部文件] 那张截图中的文件为本资料所有内容，下载后即可获得。
预览截图请勿抄袭，原稿文件完整清晰，无水印，可编辑。
有疑问可以咨询QQ：414951605或1304139763
摘 要
本次毕业设计的的题目是连杆的工艺工装及夹具设计。连杆是柴油机的主要传动件之一，连杆是汽车发动机中的主要传动部件之一，它在柴油机中，把作用于活塞顶面的膨胀的压力传递给曲轴，又受曲轴的驱动而带动活塞压缩气缸中的气体。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。
关键词: 连杆；变形；加工工艺；夹具设计
Abstract
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 precision 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 processing the surplus , cutting force and internal stress progressively , revise the deformation after processing, can reach the specification requirement for the part finally .
Keyword: Connecting rod；Deformination；Processing technology；Design of clamping device
目 录
摘要····························Ⅰ
Abstract·········Ⅱ
绪论······························1
1 连杆加工工艺·········2
1.1 连杆的结构特点····································2
1.2 连杆的主要技术要求····························2
1.2.1 大、小头孔的尺寸精度、形状精度·3
1.2.2 大、小头孔轴心线在两个互相垂直方向的平行度··············3
1.2.3 大、小头孔中心距·····························3
1.2.4 连杆大头孔两端面对大头孔中心线的垂直度······················3
1.2.5 大、小头孔两端面的技术要求·········4
1.2.6 2-Φ15螺栓孔的技术要求················4
1.2.7 有关2-Φ15孔两端面的技术要求····4
1.3 连杆的材料和毛坯······························4
1.4 连杆的机械加工工艺过程··················6
1.5 连杆的机械加工工艺过程分析············7
1.5.1 工艺过程的安排·································7
1.5.2 定位基准的选择·································8
1.5.3 确定合理的夹紧方法 ·······················8
1.5.4 连杆两端面的加工 ···························9
1.5.5 连杆大、小头孔的加工·····················9
1.5.6 连杆2-Φ15螺栓孔的加工· ·············9
1.6 确定各工序的加工余量、计算工序尺寸及公差····················9
1.7 工时定额的计算 ································11
1.7.1粗铣连杆大小头上端面·····················11
1.7.2粗铣连杆大小头下端面·····················12
1.7.3粗镗、半精镗Φ70H7孔、Φ46H7孔····12
1.7.4精铣连杆大头Φ70H7孔两端面·······13
1.7.5粗铣、精铣2-Φ15螺纹孔两端面··14
1.7.6铣宽60两侧面·································15
1.7.7铣宽64两侧面·································15
1.7.8钻、扩、铰2-Φ15H8螺栓孔并倒角C1、C1.5·················16
1.7.9钻2-Φ7孔··17
1.7.10钻2-Φ5孔（头部Φ10，角度90）·······························17
1.7.11精镗Φ70H7孔、Φ46H7孔并倒角C1·······························18
1.7.12半精镗、精镗Φ40H7铜套孔········18
1.8 连杆的检验···19
1.8.1 观察外表缺陷及目测表面粗糙度·19
1.8.2 连杆大头孔圆柱度的检验·············19
1.8.3 连杆体、连杆上盖对大头孔中心线的对称度的检验······19
1.8.4 连杆大小头孔平行度的检验·········20
2 夹具设计···············21
2.1问题的提出····21
2.2 夹具设计·······21
结论··························23
致谢··························24
参考文献··················25
川公网安备: 51019002004831号