EM165柴油机机体机械加工工艺及其组合机床钻孔夹具设计 摘要 箱体类是机器或部件的基础零件，它将机器或部件的一些轴、套、轴承和齿轮等有关零件装配起来，使其保持正确的相互位置关系，以传递转矩或改变转速来完成规定的运动。因此，箱体的加工质量对机器的工作精度、使用性能和寿命都有直接的影响。 箱体零件虽然结构多种多样，但有共同的特点：多为铸造件，结构复杂，壁薄且不均匀，内部呈腔形，加工部位多，加工难度大。既有精度要求较高的孔系和平面，也有许多精度要求较低的紧固件。箱体类零件上面的孔与孔之间有较高的位置精度（孔与孔的平行度、孔的轴线与面有垂直度要求），其加工质量的好坏直接影响柴油机的精度和使用性能，因此柴油机汽缸的加工质量至关重要。箱体类零件的机械加工劳动量约占整个产品加工量的15%～20%。 机体是柴油机中的重要部件，属于箱体类构件。属于大规模生产。本次设计做的是“柴油机机体机械加工工艺及其组合机床钻孔夹具设计”，主要是先对机体进行零件分析；然后进行毛坯确定，根据尺寸画出毛坯图；再后进行加工工序的设定以及确定切削用量和加工工时；最后进行指定工序的夹具设计。 关键词：机体；零件分析；毛坯图；切削用量；夹具 Abstract Box class is the fou
ndatio
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ngs a
nd gears assembled to mai
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n the mutual positio
n to tra
nsmit torque or cha
ngi
ng the speed to complete the required moveme
nt. Therefore, the cabi
net processi
ng quality precisio
n machi
nework, performa
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nd life has a direct impact. Although the structure of avariety of cabi
net parts, but there are commo
n characteristics: mostly casti
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nd the hole box parts above the high positio
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nd the hole, the hole axis a
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ng quality directly affect the accuracy a
nd performa
nce of the diesel e
ngi
ne Therefore the quality of critical processi
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ngi
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ni
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ntire product processi
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nt i
n diesel, belo
ngs to box body ki
nd structure. I
n society procedure of productio
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n large scale. The part, bei
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nalyses"the diesel collective machi
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nd their combi
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n carries out setti
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nd ascertai
ns theworki
ng hour cutti
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nd processi
ng; Carry out the grip desig
n allocati
ngworki
ng procedure's fi
nally. Keywords：Airframe; Compo
ne
nts a
nalysis; Semifi
nished materials chart; Cutti
ng specificatio
ns ; Jig. 目录 摘要1 Abstract 2 前言5 1.零件分析6 1.1机体的主要作用是6 1.3主要尺寸公差及分析9 1.4表面粗糙度要求9 2.毛坯的确定9 2.1毛坯材料及形式的确定9 2.2铸造的加工余量及尺寸公差的确定10 3.工艺规程的设计11 3.1附主视图一张11 3.2定位基准选择11 3.2.1粗基准的选择11 3.2.2精基准的选择12 3.3制定加工工艺路线12 3.3.1确定面的加工方式12 3.3.2初步确定工序13 3.3.3最终工序14 3.4刀具、量具、夹具及设备的选择16 3.5切削用量及加工工时的确定17 4.夹具设计39 4.1机床夹具的作用39 4.2机床夹具的组成40 4.3夹具设计40 4.3.1定位的选取40 4.3.2弹簧的计算及选取41 4.3.3夹紧力计算42 4.3.4汽缸的选择43 4.3.5连接板的选用44 4.3.6上底板44 4.3.7下底板45 4.3.8支撑杆的选用45 4.3.9钻模的选取46 4.3.10定位误差分析46 4.4夹具的使用及维护48 4.5夹具标准件的选择48 4.5.1支撑杆螺母的选择48 4.5.2连接板上螺钉选择49 4.5.3管接式法兰汽缸套件的选择49 结论50 参考文献51 致谢53