我厂生产的一种汽油帆铝活塞,顶面为R60mm的球体(图1)。对R60mm的球面,由于车削速度不一致,表面粗糙度达不到要求。为此,我们在小型活塞机床上自制了一套外球面铣削装置,用回转铣削加工铝活套顶球面,收到满意的效果。表面粗糙度达Ra2.5,班产量400件左右。铝活塞顶球面的铣削装置见图2。它由定位拉紧和回转两部分组成。工作时,先将 I plant a petrol sail aluminum piston, the top of the sphere for the R60mm (Figure 1). On the R60mm spherical surface, due to the inconsistent turning speed, surface roughness does not meet the requirements. To this end, we have made a set of spherical milling machine in the small piston machine, rotary milling aluminum dome top sphere, received satisfactory results. Surface roughness of Ra2.5, class production of about 400. The milling device for the top surface of the aluminum piston is shown in Figure 2. It consists of positioning tension and rotation of two parts. When working, first