摘 要
本次设计的主要内容是十字接头加工工艺规程及?22?0.033孔车孔夹具
0的设计。十字接头主要是与其它零件配对使用，其主要加工表面及控制位置为?22?0.033内孔和?400?0.039内孔。由零件要求分析可知，保证?22?0.033孔
00?0.039孔的精度尺寸的同时应该尽量保证其平行度，这对于后工序装
0?0.039配和总成使用上来说都有重要影响。所以，工序安排时，采取以?40内
0和?40孔粗定位夹紧加工后，对?22?0.033孔进行车削加工同时成型。因其粗糙度为
0Ra6.3，可通过粗车、精车满足。对于钻2-M10螺孔时，主要以十字接头的四个侧面定位，控制其自由度，以达到加工出来的产品满足要求并且一致性好的目的。本文的研究重点在于通过对十字接头的工艺性和力学性能分析，对加工工艺进行合理分析，选择确定合理的毛坯、加工方式、设计高效、省力的夹具，通过实践验证，最终加工出合格的十字接头零件。
【关键词】十字接头 加工工艺 夹具设计 夹具
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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
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目 录
摘要 ..................................................................... 3 Abstract .......................................................................................................................................................4 第一章 绪 论 ............................................................................................................................................4 第二章 零件的分析 ...................................................................................................................................5
2.1、零件的作用 ...................................................................................................................................5 2.2、零件的工艺分析 ..........................................................................................................................5
第三章 毛坯的确定以及毛坯图和零件图的绘出 ............................................................................7
3.1、分析毛坯的制作以及其组成 ...................................................................................................7 3.2、加工余量和工序、毛坯尺寸的确定 ......................................................................................7
第四章 十字接头的工艺规程的设计 ..................................................................................................9
4.1、确定定位基准 ..............................................................................................................................9 4.2、工艺路线的确定 ........................................................................................................................10 4.3、选择加工设备及刀、夹、量具 .............................................................................................12 4.4 确定切削用量及基本工时 ......................................................................................................12 4.4.1粗铣十字接头∮34外圆两侧端面至尺寸 ..............................................................12 4.4.2 粗铣十字接头∮53外圆两侧端面至尺寸 ..............................................................12 4.4.3粗铣十字接头24X54腰型凸台至尺寸 ....................................................................12 4.4.4 4.4.5
?0.033粗车、半精车?220内孔至尺寸 .........................................................................12 ?0.039粗车、半精车?400内孔至尺寸 .........................................................................20
4.4.6钻、攻M6深12螺纹孔 .................................................................................................12 4.4.7钻、攻M10深螺纹孔 ......................................................................................................12 4.4.8钻孔∮3沉孔∮6 ..............................................................................................................12 4.4.9拉2.5X2沟槽 ...................................................................................................................12
第五章 车孔夹具的设计 ....................................................................................... 错误！未定义书签。
5.1选择定位基准 ....................................................... 27 5.2分析误差 ......................................................................................................... 错误！未定义书签。
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5.3夹具的夹紧力和切削力的计算 ................................................................................................28
5.4夹紧元件及动力装置确定 .............................................................................................................33 5.5夹具设计及操作的简要说明 .........................................................................................................34
小结.............................................................................................................................................................34 参考文献 ..................................................................................................................................................34 致 谢 ..................................................................................................................................................34
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