| As an important part of processing automotive parts,automotive cover molds have attracted widespread attention from the manufacturing and academic circles with the rapid development of the automotive industry.The processing quality of automobile cover molds directly affects the quality of automobiles.Surface processing occupies a very important position during the entire manufacturing process of the mold.Grinding,as an important process of mold processing,can not only improve the surface quality of the mold surface,but also effectively improve the phenomenon of stress concentration.At present,the traditional grinding methods are all done by hand,which is not only time-consuming and labor-intensive,but also inefficient,and has high technical requirements for the grinding workers.With the development of industrial robots and their wide application in manufacturing,due to their large working space,multiple degrees of freedom,and better flexible structures,robots can process more complex workpieces on the surface and have good operations.Therefore,in the automatic grinding system,robot processing can play a greater advantage and potential.However,because the technology of developing an automatic system for robotic grinding of free-form surfaces is quite complicated,at present,there are very few grinding and polishing systems in the market at home and abroad.The research content of this paper is mainly to study some existing problems in the existing automatic system for robot grinding free-form surfaces.The main research contents of this article are as follows:(1)Set up a robot operation platform,and fully consider the impact of the grinding process on the grinding tools and design a flexible grinding tool that can be clamped at the end of the robot,which provides the robot with flexible(2)In order to make the end grinding tool better in the robot and achieve a good grinding effect,the finite element analysis software ANSYS was used to analyze the simulation of the most important structural flexible sleeve in the grinding tool,and the structure optimization analysis was performed.The ADAMS software is used to simulate the kinematics of the grinding tool,verify the feasibility of the grinding tool,and continuously improve the motion stability of the grinding tool.(3)In order to better improve the machining quality,it is necessary to optimize the trajectory of the grinding path.This paper uses the B-Spline curve as the basic element to design a grinding path planning solution,which solves the problem of path planning in automatic grinding engineering.At the end,a flow diagram of the grinding path planning is given.The simulation was performed with MATLAB software,and the method was successfully verified.(4)In order to make the surface of the workpiece have better grinding effect and surface quality,this paper optimizes and compares the three important parameters of the grinding process,the number of grinding times,the speed of the grinding head and the grinding force.In this paper,through the univariate comparison and optimization experiment on the important parameters in the grinding process,the optimal value of the process parameters is determined.Among them,the number of grinding times is 350,the grinding tool speed is 800 rpm,and the grinding force is 10 N to 12.5N between.After grinding,the surface roughness and surface morphology of the workpiece have been improved to meet the requirements of the workpiece. |
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