Research On The Optimum Design Of Four-link Flying Shear

The flying shear is one of the essential equipments which is used to cut the planchet for the following machining process in the iron and steel enterprises. The production of steel rolling has developped rapidly and continuously after the application of flying shears. The performance of flying shears will influence the productivity effect of production lines. It's particularly significant for the whole design of flying shears to research on the basic structure, kinematic, simulation and optimum to improve the shear property.For this reason, this paper is proposed to design a kind of four-link flying shear and it's optimum, which is based on the simulation technique. Here are the main researching contents:First, Analysis of basic structure and principle of four-link flying shear are presented. The main parameters of the flying shear are also posted. Then analysis and calculation are executed through the traditional design method. Analysis its dynamic property,combine the ADAMS simulation software. Curves of the edge inclination angle are obtained to find out the insufficiency of the first-step design. Based on the original motion foundation, Optimization design of the four-link flying shear's structure is carried out by using the optimization mothod. A mathematical model of optimization design for traditional transmission system is established. The Matlab optimization toolbox is used to simulate the kinematic process of the flying shear to obtain the optimized results. Simulation and verification of the optimization shear structure's kinematic of the four-link flying shear are carried out through the seamless connection technology between UG and ADAMS. The optimized curves of the edge inclination angle and the optimized smooth curves of the edge level speed are also drawn, which will be use as references for designing the similar flying shears. Finally, according to the request of intensity and rigidity of the optimum flying shear, finite element simulation and analysis are carried out by UG/Nastran software on the key parts of the shear mechanism. Stress and strain results are obtained after applying certain load on the parts, which can valid the optimization of design and the reliability of design.The design method adopted in this paper will replace the traditional way well, which will perfect the design of four-link flying shears. It is no need to make a real prototyping to finish the design of products by using the virtual prototype technique, which can shorten the design cycle, increase the feasibility of design, save in material and reduce production costs.