机械5

柴油机连杆加工工艺及夹具设计 摘要 本设计是柴油机连杆加工工艺及夹具设计，连杆是柴油机至关重要的组成部分，它主要用来传递运动和力。连杆在复杂的外力作用下工作，很容易发生变形，这就需要连杆强度要高，质量要轻。 本设计安排了柴油机连杆加工工艺，首先分析了连杆的加工现状，确定了两套加工工艺路线，择了加工的定位基准，确定重要加工表面采用的加工方法以及加工步骤。然后计算了两端面和小头孔的加工余量，并进行工序尺寸的计算，验算了加工余量。进行了切削用量，切削速度等的计算，绘制并填写了工艺卡。 进行了磨结合面的磨床夹具的设计。对连杆的尺寸和形位要求进行分析，确定定位方案，选取了定位元件，进行定位误差的计算，确定了对刀元件，进行对刀尺寸的计算，计算了磨削力，确定夹紧力以及加紧方案，绘制了连杆零件图，磨床夹具体图，夹具装配图，以及夹具体三维图等。本次设计满足工作量，能够达到设计的标准要求。 关键词：柴油机；连杆；加工工艺；夹具设计 ABSTRACT The desig
n of diesel e
ngi
ne co
n
necti
ng rod processi
ng tech
nology a
nd fixture desig
n .Co
n
necti
ng rod is a
n importa
nt part of diesel e
ngi
ne, is o
ne of the importa
nt artifact tra
nsfer moveme
nt a
nd force. The co
n
necti
ng rod works u
nder the complicated exter
nal force, it is easy to deform, which requires high stre
ngth a
nd light quality. This desig
n arra
nges the diesel e
ngi
ne co
n
necti
ng rod processi
ng craft, first a
nalyzes the co
n
necti
ng rod processi
ng actuality, establishes two sets of processi
ng craft route, chooses the processi
ng localizatio
n datum, determi
ne the importa
nt machi
ni
ng surface adopts the processi
ng method a
nd the processi
ng step. The
n calculate the machi
ni
ng allowa
nce of both e
nds a
nd small head holes, a
nd calculate the worki
ng procedure size, check the machi
ni
ng allowa
nce. The calculatio
n of cutti
ng dosage, cutti
ng speed, etc. is carried out a
nd the process card is draw
n. The gri
ndi
ng fixture desig
n of the gri
nder-bo
nded surface is carried out. The dime
nsio
n a
nd shape of the co
n
necti
ng rod are a
nalyzed, a
nd the positio
ni
ng scheme is determi
ned. The positio
ni
ng eleme
nt is selected, the positio
ni
ng error is calculated, the cutter eleme
nt is calculated, the cutter size is calculated, the gri
ndi
ng force is determi
ned, the clampi
ng force is computed, the co
n
necti
ng rod parts drawi
ng, the co
ncrete drawi
ng of the gri
nder clamp, the fixture assembly drawi
ng, a
nd the co
ncrete 3d graph are draw
n. This desig
n meets the workload, ca
n meet the desig
n sta
ndard requireme
nts. Keywords: Diesel e
ngi
ne ；co
n
necti
ng rod processi
ng tech
nology ；Machi
ne tool fixture 目录 摘要I ABSTRACT II 1绪论1 1.1柴油机的介绍1 1.2连杆机构的介绍2 1.3连杆加工现状- 6 - 1.4设计主要内容....................................................................................3 2柴油机连杆加工工艺设计5 2.1连杆的技术要求5 2.2连杆材料的选择6 2.3工艺路线的安排6 2.4连杆的加工工艺流程6 2.5定位基准的选取7 2.6加工余量的计算.............................................................................7 2.7加工方法及工序尺寸的计算.......................................................8 2.8切削用量的计算...........................................................................10 2.9典型工序尺寸的计算...................................................................11 3机床夹具的设计15 3.1设计要求的分析15 3.2总体方案的设计16 3.3定位误差的分析...........................................................................16 3.4对刀装置的设计.........................................................................17 3.5夹紧装置的选择及夹紧力的计算...............................................18 4环保分析...................................................................................................22 结论23 参考文献24 附录1 25 附录2 28 致谢32