轴向柱塞泵球面摩擦副冲铆工艺优化的有限元分析及试验验证

柱塞杆与座零件形成的摩擦副，制造过程极易造成该位置过度变形，导致异常磨损，以及泵性能失效，因此有必要分析轴向柱塞泵球面摩擦副制造工艺过程。本文以制造工艺对摩擦副的应变为研究对象，利用应力应变的有限元仿真，分析压配过程、冲头工装对摩擦副结构的影响，以及变形后摩擦副间隙内的流场力分布情况，得出工艺参数应选择适当的应力值(数值800~~1000N)、选用约60°结构的冲头工装执行冲铆工序的结论。通过有限元分析，为提高泵合格率做理论支撑。

Finite Element Analysis and Experimental Verification of Punching Process Optimization for Friction Pair of Axial Piston Pump

It is very easy to cause excessive deformation of the friction pair formed between the piston rod and the slipper in the manufacturing process. It causes abnormal wear and failure of pump performance. Therefore, it is necessary to analyze the manufacturing process of the spherical friction pair of axial piston pumps. In this paper, the strain of friction pair caused by the manufacturing process is taken as the research object, and the finite element simulation of stress and strain is used to analyze the influence of press fitting process and punch tooling on the structure of friction pair, as well as the flow field force distribution in the clearance of friction pair after deformation. It is concluded that the appropriate stress value (800~1000N) should be selected for process parameters, and the punch tooling with about 60 ° structure should be selected to perform the process .Through the finite element analysis, it provides the theoretical support for improving the qualified rate of pumps.