摘要
基于阀芯端帽的外形特征及磨损状况,规划阀芯端帽工作面激光合金化的扫描路径。设计双向变螺距螺旋式扫描路径对阀芯端帽工作面进行激光合金化,推导出该扫描路径的参数方程及螺旋角计算公式,使用Nd:YAG激光器进行编程加工,将采用双向变螺距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损试验。研究发现:采用双向变螺距螺旋式扫描路径时,阀芯端帽工作面的耐磨性能是直纹式扫描路径的1.8倍,而热变形量约为直纹式扫描路径的1/3。
Based on shape characteristics and wear conditions of valve core end caps,laser alloying path had been planned.The working surface of valve core end caps had been strengthened by laser alloying,and the scanning path was composed of two reversed helix,which were designed with variable screw pitch.The parametric equation of the helical scanning path and formula of helix angle had been deduced.And then the valve core end caps had been processed by Nd：YAG laser.The scanning path of specimens testing in wear test includes the helical scanning path and straight scanning path.Some results were obtained from the wear test.By using the helical scanning path,the wear resistance is 1.8 times of using straight scanning path,although the thermal deformation of the helical scanning path is about a third of that.
出处
《制造技术与机床》
北大核心
2013年第9期129-131,共3页
Manufacturing Technology & Machine Tool
关键词
激光合金化
加工工艺
路径规划
Laser Alloying
Processing Techniques
Path Planning
