In order to verify the test results of the previous ring block model samples, the size distribution of the pit bionic shape with the best wear resistance in the ring block model test results is processed to the meshing tooth surface area of the actual spur gear by using the laser graphic engraving technology, that is, a certain rectangular micro pit shape is formed near the base circle of the spur gear.
There are two groups of wear comparison of actual spur gears, one is the untreated smooth spur gear, and the other is the spur gear with concave bionic shape; Put them into the spur gear testing machine respectively to carry out the friction and wear test of two kinds of spur gears. Due to some machining errors in the processing of spur gears, the transmission shaft of the test-bed generally does not achieve complete axis fit, and the tooth surfaces of large and small spur gears usually do not contact completely and evenly. Therefore, before the loading test, the spur gear needs to be run in at empty load and low speed. Generally, the running in time of 3 hours in the test is the best. In order to ensure the safety of spur gear meshing wear test, it is also necessary to carry out load running in.
According to the material characteristics and actual test conditions of spur gear, the load level is selected as level 1, that is, the loading torque is T1 = 95280n · mm, and the full load test is carried out after running in at low speed (1450r / min) for 8 hours. The full load test adopts Level 3 load, the loading torque T1 = 175300n · mm, and the rotating speed is 2900r / min; Circulating water cooling is adopted, the oil temperature is controlled within 50 degrees, and the meshing operation time of each pair of spur gears is 48 hours.