For a long time, researchers at home and abroad hope to suppress and reduce the grinding heat generated in the grinding process as much as possible by means of small cutting depth or wet grinding, so as to prevent the thermal damage caused by the grinding heat to the surface of spiral bevel gear, which makes the large amount of heat generated in the grinding process unable to be effectively utilized.
Grinding strengthening is a new way to solve this problem. By effectively controlling the large amount of grinding heat generated under the condition of dry grinding, it makes the surface of spiral bevel gear undergo martensitic transformation, further improves the hardness of the surface of spiral bevel gear to a certain extent, obtains a certain depth of residual compressive stress on the surface of spiral bevel gear, and improves the surface quality of spiral bevel gear. Grinding strengthening can not only correct the deformation error generated in the heat treatment link, but also use the grinding heat generated in the grinding link to imitate the high and medium frequency quenching heat source, which can further strengthen the surface properties of steel parts in the grinding process. Compared with surface strengthening methods such as shot peening and electric spark, the strengthening process can be effectively integrated into the machining production line, with short production cycle and low cost, It has the advantages of less pollution and has remarkable economic benefits and social value.
Through the grinding test, firstly analyze the microstructure change of the strengthening layer after grinding, and then carry out the grinding strengthening test with different grinding speed and grinding depth to study the microhardness gradient of the strengthening layer, the depth of the strengthening layer and the microhardness change of the grinding surface, so as to put forward the guiding theory for the grinding surface strengthening method of spiral bevel gear steel 30CrMnTi.