曲轴随动磨削中误差建模与变形影响因素研究  

Error Modeling and Force Effects Analysis on Crankshaft Pin Diameter in Path Controlled Grinding

作　　者：曹成真 姚振强[1] 张雪萍[1] 覃建芳 潘赐钰 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上汽通用五菱汽车股份有限公司,广西柳州545027

出　　处：《组合机床与自动化加工技术》2015年第5期50-53,57,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：汽车发动机制造精度控制的"两微米"工程(2012BAF06B03)

摘　　要：结合随动磨削过程中曲轴和砂轮的运动特点,通过理论分析建立了连杆颈直径尺寸的误差分析模型。同时利用有限元仿真和MATLAB计算,分析随动磨削中连杆颈的受力变形规律和影响连杆颈直径尺寸的因素,从而实现对连杆颈磨削精度的控制。理论计算表明,在力的综合作用下,连杆颈的变形呈现出以360°为周期的周期性;磨削力和中心支架力是影响连杆颈直径尺寸的因素,顶尖力不影响连杆颈的直径。最后通过随动磨削实验验证了误差分析模型和理论分析的正确性。Under the kinematic analysis in path controlled grinding process,an error analysis model on crankshaft pin diameter is established through theoretical analysis. The deformation pattern caused by forces during path controlled grinding process and the factors which affect the grinding precision of crankshaft pin diameter are analyzed with finite element simulation and M ATLAB calculation methods,in order to achieve accurate control of crankshaft pin in path controlled grinding process. The theoretical calculation results showthat the deformation of crankshaft pin occurs at 360 degree cycle,it is the grinding force and workrest pressure that affect the diameter of crankshaft pin,and the top pressure does not affect the diameter of crankshaft pin. The model and the theoretical calculation results are validated by the experiment of crankshaft pin＇s path controlled grinding.

关 键 词：随动磨削 连杆颈直径 误差建模 力的影响 

分 类 号：TH161[机械工程—机械制造及自动化] TG65[金属学及工艺—金属切削加工及机床]