Shear Failure Mechanism Analysis and Optimum Design of 850 Ton Cold Shear Based on Orthogonal Test
In order to reduce the shear force of 850 ton cold shears,the shearing mechanism and characteristics of the cold shear were studied,the effects of shear parameters such as shear clearance,blade inclination,shear velocity,blade width and blade overlap on shear force were analyzed by or-thogonal test.Variance,range and significance were used as the indexes of influencing factors,and the priority of them were given to optimize the shear parameters and reduce the shear force.The ex-perimental verification of the cold shear before and after the optimization of shear parameters were carried out in the workshops which show that the errors between the measured and simulated values of the shear force of the cold shear before and after optimization were within 5％,which verifies the reli-ability of the simulation analysis.By setting the optimal shear parameters and shearing the same steel bar,the maximum shear force of the upper shear blade is reduced by 5.84 kN,about 13％.The maxi-mum shear force of the lower shear blade is reduced by 4.77 kN,about 9.7％.Feedbacks from work-shops show that the optimization greatly prolongs the period of blade broken and blunt and improves the blade life and shearing efficiency.The results are of great significance for improving the economy and production efficiency of the equipment,and may be applied to the engineering design of the same type of cold shears.
cold shearshear forceorthogonal testshear parameterblade life
万方数据
维普
