Through the friction and wear test, the comparative experimental research between the smooth sample and nine different pit bionic ring samples is carried out, the friction and wear between the two tooth surfaces of the automobile gear under the normal meshing wear state is simulated, and it is concluded that the wear resistance of the No. 6 ring sample is relatively good. Using the ring block model sample to simulate the automobile gear, the friction and wear test is carried out, which reduces the amount of friction and wear samples between the actual processed gear and the actual gear, reduces the test cost, and achieves a good research effect.
In order to further verify the conclusion of the friction and wear sample of the ring block sample, the friction and wear test of the actual gear needs to be carried out. The results of the orthogonal test design, that is, the pit bionic shape and size with the best wear resistance, are processed to the meshing tooth surface area of the actual gear, and the actual wear resistance of untreated automobile gear and automobile gear with the best pit bionic wear resistance shape are compared and tested.
The weight loss method is used to evaluate the wear resistance of the ring sample. The reason is that the weight of the ring sample is light, and the change will be very obvious compared with its original weight after wear. Therefore, the weight loss method is more reasonable; After the actual gear test wear, the wear amount and wear rate of automobile gear relative to its own weight are not enough to evaluate the wear resistance of automobile gear. Therefore, the surface shape parameters of automobile gear are tested by automobile gear precision measuring instrument to obtain the error value of gear tooth surface, and the changes of gear surface shape parameters before and after the test are used to evaluate the wear resistance of automobile gear. If the tooth profile error and tooth direction error of automobile gear change greatly before and after the test, it indicates that the automobile gear is seriously worn; On the contrary, the variation of tooth profile error and tooth direction error of automobile gear is small, which indicates that the wear resistance of automobile gear is good.