| This article mainly aims at a problem where the smooth of six bar linkage in the process of cutting. In the process of cutting, the transfer of machine is good. When cutting the jobs, we need speed smoothly, so we can get a better quality of job. On the way back, because of not cutting the job, the speed of return is bigger, this characteristics is the fast-returning.The traditional design method is to choose the larger swinging Angle of guide bar and the right guide road location, this not only fast-returning characteristic is apparent, the transmission performance also improved, mechanical efficiency is also improved. But how to describe the speed of the head in the work process of the relevant issues cannot be directly assessed. In order to solve this problem, this paper proposes to control the cutting speed by changing the length of the rod to realize the speed of the plane in the cutting process, so as to improve the quality of the cutting job.This paper is based on the background of the research at home and abroad, through the observation of the overall structure of the six bar linkage of shaper, understanding the whole state of the mechanism, using the dynamic simulation software ADAMS of the constraints., using the technology of virtual prototype to realize the simulation of the whole mechanism. The simulation results are compared with the theoretical data, and the feasibility of the simulation is verified. From the six bar linkage of shaper mechanism schematic diagram to find the theoretical basis for the design optimization, find the factors related to the influence of the planer head point E, constraint conditions and according to the speed of the plough head of objective function is established by method of optimizing design, using MATLAB software program to find the optimal link length. After the optimization, the rod length is brought into the ADAMS software to carry on the comparative analysis to find out the effect of the optimized length of the rod on the speed of the plow head. Through optimization, it is found that the optimized speed is close to the actual cutting speed, and the speed is decreased with respect to the optimization, so as to realize the speed stability of the plane head during the cutting work.In the process of writing, the paper uses the vector analysis method to analyze the dynamics of the mechanism, and puts forward the theoretical basis for the optimization design and Simulation of the mechanism. At the same time, a method is proposed to control the length of the remaining members by selecting the length of any crank. The rod length optimization to the best working state, the working speed values closer to the theory of speed value as the objective function, in line with production actual requirements of the agency, and long rod of the optimal ratio, provides the design idea and design method for optimization design of other reciprocating machinery. The optimized speed is stable, the acceleration peak is reduced, and the life of the job is improved, and the characteristic of quick return is increased obviously. |