Hot working die thermo-mechanical fatigue tester

Abstract

The invention relates to a hot working die thermo-mechanical fatigue tester. The tester comprises a hot working die mounting base and a preform block mounting base. The tester also comprises a power mechanism for driving the hot working die mounting base and the preform block mounting base to carry out motion towards each other in the opposite directions and motion far from each other in the opposite directions. The tester also comprises a heating device for heating a preform block on the preform block mounting base. The heating device is used for heating the preform block and then the power mechanism drives the hot working die to carry out ejection-pressing fit to the preform block so that heat conduction between the hot working die and the preform block is realized and thus the hot working die is heated and the real working condition of the hot working die in a mechanical stress cycle and a temperature cycle is simulated. The tester realizes an alternating mechanical stress state and an alternating heat load state of the hot working die under actual motion conditions and has the characteristics of high reliability, good stability and measured value close to the real value.

Description

technical field [0001] The invention relates to a thermal engine fatigue test device for a hot working mold. Background technique [0002] Hot working dies are divided into hot extrusion dies, hot forging dies and die-casting dies, which are affected by both force and temperature during work. It involves load cycles, temperature cycles, creep, friction and wear, and environmental effects, etc. Affected by many factors, the working conditions of hot work molds are complicated. Studies have shown that one of the main failure modes of hot work dies is thermal fatigue failure. Under the thermal-mechanical load condition of alternating cycles, some points on the hot-working die, especially the wires on the working surface, produce local permanent structural changes due to the action of alternating thermal stress and mechanical stress. After a certain number of cycles, thermal cracking, tearing, bonding or fracture will result in fatigue damage; and its harsh service conditions ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a thermal fatigue test device for hot working dies, to solve the problem that the test device in the prior art cannot directly heat the hot working dies and apply pressure to the hot working dies through a punch that does not belong to the preformed material. Effectively meet the actual service conditions of hot work dies

Images