零件表面光洁度为什么重要?我们都知道,机器零件在经过铸造或锻造出毛坯以后,它们的表面一般是很粗糙的。这些零件在经过机械加工以后,表面就要平滑得多了。可是,在经过粗加工(如粗车)的零件表面上,我们可以看出像细螺纹一样的痕迹,即使是经过精加工,这种痕迹也还是可以看得出来。如果零件经过精磨,甚至经过超极研磨,用肉眼就几乎看不出什么痕迹了。 Why is surface finishes important? We all know that machine parts are generally rough surfaces after they have been cast or forged. After these parts have been machined, the surface is much smoother. However, on the surface of a part that has been rough machined, such as a rough car, we can see traces like fine threads that are visible even after finishing. If the part is ground, even after ultra-pole grinding, it barely shows any trace with the naked eye.