Features of the formation defects the ore-grab loading crane TAKRAF
Gavrish Р. A., Ermakova S. A. Features of the formation defects the ore-grab loading crane TAKRAF // Herald of the DSEA. – 2019. – № 2 (46). – Р. 93–96.
The purpose of work is the analysis of the reasons formation of the defects metal construction of the loading crane. In work the specialized technique of the analysis of constructive realization of welded clusters is used. Namely: the analysis of the factors of influence caused by welding process, the analysis of loadings of welded knot and existence of transfer of power loadings in knot and also the analysis circuit packing solutions of welded knot of a metal construction. The three-dimensional model of section of the main beam in the SolidWorks program is created and sizes of deformations of the main beam when moving the cart are determined by rails. Creation of mathematical model of the deformation section the main beam. Determination of sizes deformations of a zone fastening internal and external pockets. The dependence sizes of the deformations on distance to an axis and subcart rail is established. Factors to on emergence the fatigue damages of a metal construction are defined. The analysis of the reasons emergence of the fatigue damages on the main beams of the crane is made. The type of the loading main beams of the crane is defined. Lines of influence of single force at the mobile loads of the main beams of the ore and clamshell loading crane are built. The analysis of the reasons of defects established at expert inspection of the ore and clamshell loading crane is made. The main directions of constructive changes of welded knot of the main beam for increase in a fatigue resistance of a metal construction of the crane are defined.
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