装夹误差对柴油机机身变形影响分析  

Analysis of the Influence of the Clamping Error on Diesel Engine Fuselage Deformation

作　　者：艾杼桦 周宏根[1] 李纯金[1] 李国超[1] 田锐敏 杨武刚 刘艳 曹利平 AI Zhuhua;ZHOU Honggen;LI Chunjin;LI Guochao;TIAN Ruiming;YANG Wugang;LIU Yan;CAO Liping(College of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China;Shaanxi Diesel Engine Heavy Industry Co.,Ltd.,Xingping Shaanxi 713100,China)

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212003 [2]陕西柴油机重工有限公司,陕西兴平713100

出　　处：《机床与液压》2022年第19期140-147,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金青年科学基金项目(51605207);江苏省青年科学基金项目(BK20160563)。

摘　　要：以典型的柴油机机身曲轴孔装夹为例,采用有限元分析方法,分析V形块角度误差对曲轴孔装夹状态下机身变形的影响。通过改变V形块角度及机身同V形块之间的接触状态,分析柴油机机身可能发生的接触情况及其受力状态;运用ABAQUS仿真软件对机身各种接触情况进行模拟仿真,获得曲轴孔系的一条母线和机身截面节点的变形量,并将其作为机身曲轴孔装夹状态下变形的评价指标;根据角度误差和接触区域状态,讨论装夹误差的组成部分,并分析装夹误差的影响规律。结果表明:在一定角度误差范围内,角度越大,机身变形越大;在V形块角度相同的条件下,交叉的线面接触对机身变形的影响较小;在柴油机机身曲轴孔装夹状态的条件下,A3-E接触状态对机身变形的影响最小;机身在x、y方向上是弯曲变形,在z方向上是扭曲变形。Taking the typical crankshaft hole clamp of diesel engine fuselage as an example,the influences of V-block angle error on the fuselage deformation under the crankshaft hole clamp state were analyzed by using finite element analysis method.By changing the angle of V-block and the contact state between the body and V-block,the possible contact condition and stress state of the diesel engine body were analyzed;all contact conditions of the body were simulated by using ABAQUS simulation software to obtain the deformation amount of one busbar of the crankshaft hole system and the cross-section joint of the body,and it was used as the evaluation index of the deformation under the clamping condition of crankshaft hole of the body;according to the angle error and the state of contact area,the components of clamping error were discussed and the influence rules of clamping error were analyzed.The results show that within a certain angular error range,the larger the angle is,the larger the deformation of the fuselage is;when the angles of V-shaped blocks are the same,the cross line surface contact has little effect on the fuselage deformation;under the condition that the crankshaft hole of the diesel engine body is clamped,the A3-Econtact state has the least effect on the deformation of the engine body;the fuselage is bent deformed in the x and y directions,and twisted deformed in the z direction.

关 键 词：机身装夹变形 制造误差 V形块角度误差 接触状态 

分 类 号：TH161[机械工程—机械制造及自动化] TH162