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在汽车的性能中 ,发动机阀座的表面质量是至关重要的 ,表面跳动和圆度等几何形状的误差也同样重要。这些性能影响阀与座之间的密封性 ,阀座是由钢材 (粉末冶金生产 ,维氏硬度为 3GPa)制作成的。在这项研究中 ,作者使用了 PCBN工具加工这些阀座 ,平均切削速度为 16 1m/ min。根据工具侧面的最大磨损和表面形貌参数 ,观察了速度、切深和进给速率等加工参数的影响 ,在这些加工参数中 ,进给速率对阀座的表面粗造度影响最大 ,同时 ,切削速度越高 ,加工的表面质量越好。最高的进给速率和最低的切削速度的结合给磨损提供了一个最大临界值 ,在这种情况下 ,发现了侧面和凹坑磨损的出现。
In automotive performance, the surface quality of the engine seat is of paramount importance, and geometric errors such as surface runout and roundness are equally important. These properties affect the tightness between the valve seat and seat made of steel (powder metallurgy, Vickers hardness of 3GPa). In this study, the author used PCBN tools to machine these seats with an average cutting speed of 16 1 m / min. According to the maximum wear and surface topography parameters of the side of the tool, the effects of processing parameters such as speed, depth of cut and feed rate were observed. In these processing parameters, the feed rate had the greatest influence on the surface roughness of the valve seat, The higher the cutting speed, the better the machined surface quality. The combination of the highest feed rate and the lowest cutting speed provides a maximum cut for wear, in which case the occurrence of flank and pocket wear was found.