At present, Shandong Jinxin chain factory coal mine uses the flat link to carry on the dynamic fatigue electrical test, which catches the cycle number when the fatigue crack occurs, and provides the theory for the reasonable design and the promotion of the link life The experimental basis is discussed.
The flat link for mining ring chain is suitable for the connection between mining ring chain used by underground scraper conveyor, transfer machine and coal plough. It is made of high-quality alloy steel, forged, machined, heat treated, pre stretched and other processes, so that it has high strength, toughness and wear resistance. During the working process, the link should overcome the friction resistance, bear the static and dynamic loads, and the quality of the link has a great influence on the normal operation of the conveying equipment.
Mine high strength round link chain, using nonlinear finite element analysis software to establish a simplified model of the ring chain, according to the conditions stipulated in the national bending test standard, carry out the finite element stress analysis, and get the stress field distribution of the link. This paper analyzes the changes of reaction force and friction force in the bending process of the chain link, and probes into the distribution of stress field and the changes of reaction force of the chain link under the conditions of the same working condition, different friction coefficient and manufacturing error, which provides the basis for the strength design and test evaluation of the ring chain.