Research on Optimal Design of Cutting Edge of Shear Machine Based on LS-DYNA

Aiming at the problem of steel plate buckling caused by the wear of shearer blade, the optimal design of shearer blade based on LS-DYNA nonlinear finite element method was carried out. Firstly, LS-DYNA nonlinear dynamic analysis was used to analyze the shear deformation of the cutting edge at work, and the maximum stress, strain and shear force of the cutting edge were obtained, and the reasons for the excessive wear of the cutting edge were found out, mainly including shear gap and shear Angle. Secondly, analyzed the effects of different shear parameters on the maximum stress-strain of the cutting edge. Finally, the optimized shear parameters are obtained, When the shear gap is 8 mm and the shear Angle is 11°, the stress and strain are relatively small, and the shear effect is the best. The optimized shear blade is tracked after actual production and use. The results show that the replacement cycle of the shear blade is longer, the service life is improved, and the bending problem of the steel plate after shearing is improved, which verifies the feasibility of the optimal design of the shear edge.