滚切剪剪切机构研究及力学分析-机械制造及自动化专业论文.docxVIP

湘潭大学硕士学位论文Ab 湘潭大学硕士学位论文 Abstract II II Abstract Rolling shear is mainly used for specified length and sampling steel plate after rolling as an important equipment on plate production line for iron and steel plant. Presently, most of the rolling shear that on domestic plate production line are foreign products, few of them made by ourself but introduction of foreign technology. Although there are few enterprise study on it independently now, the rolling motion theory, characteristics of shear force, stress and deformation of housing aren ’t researched by the numbers.In order to guide the equipment ’s alteration and localization, in this paper, the design theory of shear mechanism and the mechanical properties of the equipment is studied based on the comprehensive analysis of working principle of a an 3800 rolling shear. The follow work has done in this paper: Based on the comprehensive analysis of working principle and rolling motion theory, the blade’s trajectory that satisfy the pure rolling motion theory is derived, and the shear force model is established in this paper. Finally, a shear force is computed by using the technical parameters of a 3800 rolling shear to find out its variation in cutting process. The application of UG and RecurDyn is implemented to establish the kinematic model of the cutting shear mechanism and then analyze its kinematic characteristics, include the trajectory, velocity, acceleration and other kinematic features of shear mechanism. By using RecurDyn, the dynamic characteristics of the shearing mechanism is analysed to obtain some key component’s constraint reaction and driving torque so as to find out the dynamics feature of shear mechanism. Finite element analysis software NX Nastran is used to analyse the stress and deformation characteristics of the supporting housing when shear force is mostly uneven, checked out its strength and rigidity, and found out some weak link on the housing, all of which are important factor to optimize th