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基于阀芯端帽的外形特征及磨损状况,对阀芯端帽工作面激光合金化的扫描路径进行规划。根据实际使用中阀芯端帽工作面上不同的磨损状况将其划分为三个区域,设计双向螺旋式扫描路径,实现阀芯端帽工作面上不同区域的合金化面积比不同。使用Nd…YAG激光器进行编程加工,将采用双向螺旋式扫描路径的试件与采用直纹式扫描路径的试件分别进行磨擦实验。研究发现,采用双向螺旋式扫描路径时,阀芯端帽工作面的耐磨性能是直纹式扫描路径的2.5倍,而变形量约为直纹式扫描路径的1/3。
Based on the contour features and wear status of the valve core end cap, the laser scanning path of the valve core end cap working surface is planned. According to the actual use of spool end face of different wear conditions will be divided into three regions, the design of two-way spiral scanning path to achieve the spool end face of the different areas of the alloyed area ratio. The Nd: YAG laser is used for programming, and the rubbing experiment is carried out on the specimens with bidirectional spiral scanning path and the specimens with straight scanning path. It was found that the wear resistance of the spool face was 2.5 times higher than that of the ruled scanning path and the deformation was about 1/3 of the ruled scanning path when using the bidirectional spiral scanning path.