This honing process is very similar to grinding process, but also has complex processes such as cutting and scraping. A small amount of roundness error left in the previous process of how to make a spherical sphere on an ordinary lathe. The large part always contacts the inner cone of the oilstone bar first during honing, compared with the larger pressure there. Therefore, the error part is soon honed off, so there is a certain correction for roundness error. Because the honing head has a large yield, the honing pressure is low, The cutting depth of blind particles is small, and the particle size of abrasive particles is fine, so the surface roughness of the sphere is greatly improved. For example, if the material is 1CrlgNi9Ti, turning to the upper limit of the nominal size, the surface roughness Ra is 6.3 m, and the roundness error is 36 pro, the machine speed is 240 r/min, and the honing head speed is 60 m/rain. 180 brown corundum stone. After honing for 2 minutes, the surface roughness R value of the sphere can reach 0.8m and the roundness error F is 4m. In order to ensure equal honing effect, it is better to make the honing head or ball rotate reversely for half of the whole honing process.

⑤ Pneumatic electric positioner: adjust and control the medium flow of the valve according to the size of the current signal (standard 4-20mA).