Finishing of gears, sprockets, racks

current industrial applicationsgearThe finishing methods are mainly shaving, grinding, extrusion, grinding and honing.

Tooth shaving is to shave teeth with a shaving knife on a shaving machine. It is a method of gear finishing. The shaving knife is equivalent to a helical gear with many edges on the tooth surface.It drives the gears to be processed to rotate relative to each other, just like the meshing of staggered shaft gears. By the relative sliding of the tooth surfaces, the shaving knife cuts off a thin layer of metal on the tooth surfaces to complete the finishing of the gears and the adjustment of the shaving machine slide. Make sure that the gear teeth are machined correctly.The shaving precision is limited by the precision of the pre-shaving tooth processing.The shaving production efficiency is high, and it is suitable for finishing the soft tooth surface after hobbing and tooth shaping.

Tooth grinding is to use a grinding wheel to grind the tooth surface. Grinding can grind gears with hardened tooth surfaces, eliminate heat treatment deformation and improve gear accuracy.According to the different grinding wheels used, grinding teeth can be divided into: (1) Conical grinding wheel grinding;

(2) Butterfly grinding wheel grinding;

(3) Grinding teeth with large plane grinding wheel;

(4) worm grinding wheel grinding;

(5) Grinding of involute envelope toroidal worm grinding wheel;

(6) Forming grinding wheel to grind teeth.

Extrusion and honing are both methods of gear finishing.Tooth extrusion is to use the extrusion wheel to extrude the tooth surface of the processed gear to improve the surface quality of the gear.The honing method is basically the same as the shaving method, that is, the shaving cutter is replaced with a honing wheel of the same shape, and the tooth surface is polished by relative sliding with the tooth surface, and the tooth surface of the processed gear can be soft or hard.