Finite Element Modeling Of Heavy Duty Clamping Device And Dynamics Analysis

The development of forging industry in the development of manufacturing industry plays a very important role, with the development of manufacturing industry of large forgings, demand increases gradually. Due to the weight increasing of forgings, the requirements of the forging operation machine load capacity and load torque are also increasing, its dynamic performance is becoming more and more complex, the impact on the mechanism is also more and more important, and therefore the dynamics study about the heavy-load manipulator clamping mechanism has important theoretical meaning and engineering value. But the research on the bearing capacity study of heavy forging operation machine is little, and generally only calculates the clamping force on the vertical horizontal position of the stastic jaw, then calculates the driving force by the arm torque formula. This method ignore the impact of the friction caused by pin, angular displacement,angular velocity and angular acceleration and other conditions, and the result has bigger gap compared with the practical engineering application, and the clamping process control less mentioned. This paper mainly study the influence of angular displacement, angular velocity, the friction coefficient of pin shaft, and the radius of forgings to the clamping mechanism motion and the driving force, analysis the force dynamically, the transfer rules of torque by the modern advanced software UG. In consideration of friction and inertia, more close to the actual working conditions, establish the force model of the clamping mechanism, considering the variable operation condition and the dynamic clamping force of jaw clamping, analysis the bearing capacity of the clamping mechanism quanitively. Contents and conclusions are as follows:First of all, model the parts of the forging machine clamping mechanism, and in according to the requirements assemble the parts to vertical assembly by3D modeling software UG, make adequate preparations for the subsequent dynamics analysie.Secondly, establish the stress model mathematical equation of the typical pressure level type in the forging machine with the closed vector method, and then analysis the force parameters of each component in the clamping mechanism, and provide reference for the actual clamping mechanism design. Then, study the material parameters about the various parts of the clamping mechanism under actual working conditions as the displacement, stress, strain, strain energy. Observe the materials and dimensions of the mechanism in design conditions can meet the requirements of large workpiece or not. Provide basis for optimize the size of components, improve work safety for mechanism and reduce the manufacturing cost.Finally, compare the various kinetic parameters and material parameters based on the calculated by software and tested by the established test model mechanism under actual conditions; verify the result calculated by advanced analysis simulation of UG. The test data and the simulation results are basically consistent. Thereby validate the correctness and feasibility of the modeling and solving by the software.