Dimensional Optimization And Dynamic Analysis Of Large Multi-Station Press

Large multi-station press are mainly used for deep drawing of automobile covers.With the rapid development of the automobile industry,the production capacity of automobiles has increased year by year,which puts new demands on the working efficiency of press.At present,the design and manufacturing technology of large-scale multi-station press is mainly mastered by several large foreign manufacturers.The domestic design and manufacturing level is relatively low.For large multi-station press,the design of the rod system,the size design of the rod system,and the press It is of practical significance to conduct in-depth research on related issues such as static and dynamic characteristics under working conditions.The research on the related problems of 25000 kN large multi-station press mainly includes: the selection of six-link series configuration;the optimization of the size parameters of the rod;the kinematics and dynamics simulation analysis of the virtual prototype of the multi-station press.The triangular rod is placed upright and the triangular rod is inverted six-link mechanism.The motion performance and the lateral force of the six different configurations of the slider are analyzed,and the triangular rod inversion is determined.The negatively biased configuration of the six-link slider is the transmission mechanism configuration of the press.The kinematics analysis of the selected configuration is carried out to derive the formula for calculating the lateral force of the slider during the movement.The influence of the angle between the angle of the triangle and the size of the upper link on the performance of the slider and the lateral force is analyzed.The uniformity and average speed of the slider speed during the working stroke phase,the guide rail to the slider pair lateral force and the size of the six-link mechanism are optimized as the optimization target.The composite program was programmed by Matlab to optimize the design of the rod system.After optimization,the crank length was reduced by 8.5% compared with that before optimization.The speed of the slider in the working stroke stage was more uniform,and lateral force were smaller.Dynamic statics and modal simulation analysis of the six-link mechanism and the whole machine structure.A virtual prototype model of multi-station press was established,and kinematics and dynamics simulation analysis were carried out.The influence of thefrictional collision of the motion pair clearance and the clearance on the dynamic characteristics of the six-link transmission mechanism is considered.The anti-offset capability of the multi-point press slider was studied.It was verified that the designed press met the performance index.