Finite Element Analysis And Structural Optimization Of Gate Shearing Machine Based On Testing Technology

Brake type plate shearing machine is a kind of the forging and stamping machine. It makes sheet metal fracture accurately by applying shear force to sheet metal of different thickness, using reasonable blade clearance and moving the upper blade to fixed blade. Because of its simple structure, easy maintenance and operation, and high cost, it is widely used in forging Industry, mainly used in automobiles, tractors, locomotives, ships, electrical, instrumentation and other industries. In power and aviation industries industry, shears are applied to sheet metal stretching, bending, extrusion, molding and other processes. It is also suitable for a variety of high tensile strength alloy plate stretching.The design method of pressure machine including shears is based on the Mechanics of Materials, the Theory of Elasticity or empirical equation. These theoretical formulas are mainly based on idealized mathematical model, which derivation process uses a lot of simplification and assumptions. Tt is difficult to accurately calculate the deformation and stress distribution of the major components of shear by theoretical formula, which will result in lager error, irrational structure or resource-wasting and so on. With computer technology, computational mechanics, especially the development of finite element theory, it is possible to using modern methods to design and study the brake type plate shearing machine.Researches show that the rigidity of tool carrier and frame on plate shearing machine has an important influence on shear quality of sheet metal when it works, for the insufficient rigidity of tool carrier and frame will affect the shear quality greatly. In this paper, LGSK8X4050brake type plate shearing machine has a problem of poor quality in the processing of sheet metal shearing as research subject. Based on the experimental testing, the mechanical properties of shears are assessed by using the finite element method. Tool carrier and frame that having poor rigidity are optimized and improved.Its main contents are as follows:First, guillotine shear structure and mechanical characteristics are analyzed. Various parts of the displacement and dynamic stress distribution are got by using experimental test method.Second, using the universal finite element software ANSYS as an analytical tool, the overall model of the shear is established and the stiffness and strength values of the various components are obtained by performing linear static structural analysis. Combining test results to modify the model, it provides a basis for the structural optimization of the shear.Third, according to the structural rigidity and performance characteristics of the shear, the parametric modeling of tool carrier and frame on plate shearing machine based on the ANSYS WORKBENCH software was simulated, and the model was optimized to improve the structure and the rigidity of the machine.Finally, the rigidity of tool carrier weld model and frame weld model is analyzed. Compared with the rigidity of the original structure of plate shearing machine, understand the importance of welding quality for machine rigidity; the rigidity of tool carrier and frame that retaining screw connection is analyzed. Compared with the rigidity of the original structure of plate shearing machine, understand the importance of screw connection for machine rigidity...