Structure Improving And Strength Analysis Of Late-model Sectional Composite Pick-shaped Cutter

Pick is the tool which does the work of cutting down the coal and rock on the drum of shearer. Because of the complex constitution of underground coal and the bad work environment, which lead to many forms of failure of picks, finally the annual consumption of picks comes to be large, according to statistics, the Consumption rate of the pick in Domestic production reach generally30per ten thousand tons and the Imported one’s goes to20. In order to improve its service life and economy, with drawing lessons from the experience, based on the parameters of existing, we improve out a new sectional combined type of picks. The purpose to improve the pick is to found a new one which has high wear resistance as cast pick and high shocking resistance as forging pick.We preliminarily design the structure parameters of all parts of this type of picks through the theoretical formula, processing by way of the combination of casting and mechanical connection; then establish3D model in Solidworks software, together with applying the finite element software Workbench in the improved segmented composite picks to do strength check and fatigue strength assessment; computer simulation has been done before physical experiment to determine the feasibility of the structure improvement.Analysis show that the static strength and fatigue strength of the Late-model Sectional Composite Pick-shaped cutter is satisfied. The stress and strain values of the segment joint are relatively small. There will not be failure in strength before other parts suffer such situation such as wear, fracture, and fall off. This shows that the Late-model Sectional Composite Pick-shaped cutter is feasible in theory and strength.