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活塞销是连接活塞与连杆的重要零件,工作条件恶劣,在高速下承受冲击载荷,因此它不仅要有足够的强度和韧性,并且具有高的精度和表面光洁度,以提高耐磨性和使用寿命。 我国现行的国家标准和大部分图纸中规定外圆表面光洁度为9,但是,随着发动机转速、功率、寿命的提高,国外的一些重要发动机活塞销的外圆表面上光洁度均要求在10以上。因此,为了进一步提高产品质量,赶超国际先进水平,努力提高外圆表面光洁度,已成为一个十分重要而迫切的问题。
The piston pin is an important part connecting the piston to the connecting rod. The working condition is harsh and under impact load at high speed, so it not only has sufficient strength and toughness, but also has high precision and surface finish to improve wear resistance and use life. However, with the improvement of engine speed, power and life expectancy, some of the most important engine piston pin on the outer surface of the finish on the surface are required in the above 10 or more. Therefore, in order to further improve product quality, catch up with and surpass the international advanced level, and strive to improve the surface finish of the outer circle, it has become a very important and urgent issue.