Life Prediction Research On The Remanufactured Transmission Shaft Of LHD Unit

Thanks to energy is scarcing, climate environment is deteriorating, low carbon,environmental protection, energy conservation and pollution reduction as the worldconcern. All countries advocate low carbon and energy saving, our country haspromised that the carbon dioxide emissions must reduce40%or45%by2012thanin2005. With the development of industrialization and urbanization, there are manyfactors such as higher ore price, larger population and lower economic level hinderour country to realize the target. But just because of such a constraint index, Chinaaccelerated remanufacturing development and promoted circulation economyhealthy and orderly development. As the senior form of renewable resources,remanufacturing create conditions to promote developing recycling economy,energy conservation and emission reduction. It can boost the sustainabledevelopment of machinery industry.Whether manufacture products could meet with using of the next life cycledetermine itself value and significance. Therefore, lifetime prediction of the wholeremanufacturing engineering becomes a technical difficult problem. In view of thisproblem, this paper research on the life prediction of scrapers remanufacturingtransmission shaft.This paper created a three-dimension model of the transmission shaft using thePro/E software, and in order to aquire the Stress-strain data in dangerous part,analyzed the shaft’s elastic-plastic performance by the help of workbench, onefunction of ANSYS software. Then according to the principle of coordinatetransformation, establish and confirm the critical plane as well as the key injuryparameter on critical plane. According to the result of up and down method test, thepaper researched the fatigue behavior in transmission shaft with42CrMo and3Cr13electro-arc spraying layer. So caculated the torsion fatigue limit of the shaft withdifferent coating thickness and put forword that using correction factor to predictthe life of the shaft remanufactured by the mean of high velocity arc spray. Mainlytaking Brown-Miller multiaxial fatigue model for example, improved the multiaxialfatigue model in terms of correction factor and acquired the shaft fatigue lifepredicting model after remanufacturing. Lastly, combined fatigue parameter、eachinjury parameter and kinds of multiaxial fatigue models, predicting the life of newshaft and remanufactured shaft. Based on the present research of remanufacture and multiaxial fatigue in bothhome and abroad, this article forecasted the life of scraper remanufactured shaftwhich was applied the thermal spraying technology. In view of the fatigue limitationafter sprayed, researched and presented a method which is multiaxial fatigue modelreformed by the correction coefficient. This way adopts different kinds ofremanufacturing products which is got through protrusion to predict the lifetime. Atthe same time provides the reliable theory support for how to judge the fatigue lifeof remanufacturing component.