During honing, the abrasive grains on the sand strip grind, squeeze and scrape the workpiece surface at a certain pressure and low speed. The sand strip rotates and reciprocates up and down, so that the tracks of the abrasive grains on the surface of the hole become cross-shaped and non-repeating mesh patterns. Compared with inner hole grinding, honing involves more abrasive grains in cutting, and the cutting force applied to each abrasive grain is very small. The cutting speed of honing is low, only a few tenths of the grinding speed of the grinding wheel. During the honing process, a large amount of coolant is added by rotation to fully cool the surface of the workpiece, making it less likely to burn. The processing deformation layer is thin, so a finer surface roughness can be obtained.
The honing head and the machine tool spindle are connected in a floating manner to ensure uniform allowance. Since the sand strip is very long, the protruding part of the workpiece contacts the sand strip first during honing, and the contact pressure is large, so that the protruding part is quickly ground away until the surface of the workpiece is corrected to contact the sand strip completely. Therefore, honing can correct the geometric shape error and surface waviness error generated by the previous process (as shown in Figure 2), but it cannot correct the axis position error.
Honing tube
