Simulation Of Shear Process And Study Of Process Parameters Of Rotary Trimming Shear

The rotary trimming shear is the core equipment on the finishing line for wide and thick plates and is used for finishing the edges of the plates.In practice,the use of unreasonable process parameters to shear the plate will lead to a sharp increase in shear force on the upper and lower shear edge,not only to increase the wear of the shear edge,reduce life,but also affect the shear quality of the plate.Therefore,it is important to determine the process parameters of the rotary trimming shears to improve the quality of sheet cutting and disc shear life.The rotary trimming shear is taken as the research object,and theoretical research,numerical simulation and experimental comparative analysis are carried out respectively.Firstly,the shearing process,plate fracture mechanism and shear section defects of disc shears are explained based on the shearing theory of disc shears.Using the finite element software DEFORM-3D to build a disc shear model and simulate the whole process of shearing,the equivalent force and equivalent variation distribution of the wide and thick plate during the shearing process were obtained.Secondly,the process parameters of the rotary trimming shears were varied within a reasonable range,and the effects of the overlap,lateral clearance and shear speed of the disc shears on the shearing process were analyzed.The variation law of shear force under different overlap,different lateral clearance and different shear speed conditions and the process parameters corresponding to the minimum shear force required for shearing different materials and different thicknesses of plates were obtained.Finally,DEFORM-2D was used to simulate the process of shearing a wide plate with rotary trimming shears to obtain the equivalent force distribution in the deformation zone and the shear section shape.The relationship between shear force magnitude and shear section quality was analyzed,and it was concluded that the best section quality was produced by shearing the plate using the minimum shear force corresponding to the lateral gap.The shear section of the actual plate was also observed by optical microscope,and the observation results were compared and analyzed with the simulation results to verify the reliability of the finite element simulation.The determination of the process parameters of the rotary trimming shears can provide theoretical support for the actual production,shorten the adjustment time of the process parameters and improve the shearing quality of the plates.The use of finite element simulation method for trimming disc shears can accelerate the research progress and reduce the research cost.