The Manufacture And Test On Rolling Contact Fatigue Tester For Superhard Coated Material

It is very important for the exploiture, application and development of the new technology of surface engineering to tests of the rolling contact fatigue and evaluations of their tribological properties on superhard coated materials. So, it is very significant to improve and develop a new rolling contact fatigue tester. The dissertation applies the design method and theory of modern mechanical system to design the new rolling contact fatigue tester for superhard coated materials. The tester is separated into three subsystems to design-mechanical transmission system, lubrication and cooling system, control and measurement system by applying basic design theory of mechanical system. To mechanical transmission systematic design, the dissertation makes driving electromotor selection, strap transmission design, transmission shafting design, load mechanism design and tester shelf design. It also makes lubrication system and cooling system design orderly in lubrication and cooling systematic design. To control and measurement systematic design, it is designed emphatically how to use the temperature sensor to measure temperature of the specimen which makes high-speed rolling contact motion; besides, quick-stop mechanism which is used to catch initial fatigue status is also designed. Afterwards, in order to improve on the tester, the dissertation makes dynamical mode analysis on tester shelf to ascertain the vibrational characteristics of the tester and analyze the vibrational influence on tester shelf by using finite element software ANSYS. At last, the dissertation has the rolling contact fatigue tests of superhard coated materials on the tester to evaluate and verify the rationality of every system of the tester.