Research On Deburring Process And Experimental Study Of High-voltage Button Contact

High-voltage contact is the important component of the high-voltage circuit breaker.In the machining process,button contacts of high-voltage contact produce inevitably a large number of burrs,which would exert a negative impact on the function of the contact.Therefore,effective measures must be adopted to remove these burrs from button contacts.Without changing the physical and chemical characteristics of button contacts,problems about how to improve the deburring quality and efficiency,how to reduce the energy consumption and the cost as low as possible,how to ensure the high flexibility of the deburring equipment remain difficult to be solved.This thesis is to study the removal process of button contacts burrs by basing itself on the six-axis industrial robot equipment,which has important theoretical and practical engineering significance.Connect rod coordinate systems of Mitsubishi RV-4FL-D-S11 six-axis robot are established by using the D-H parameter method,furthermore the kinematics equation of the robot is established.Based on the analysis of the robotic forward solution and inverse kinematics solution,modeling and simulating of the robot is conducted in Matlab.The simulation result is primely consistent with the actual movement of the robot,which lays the foundation for the deburring traj ectory planning and robot movement control.The generation and distribution of burrs are analyzed in overall consideration of material characteristics,structural features and processing of button contacts.Based on abundant tests,high-speed filing and milling chamfering deburring process is proposed.Analyses and calculations of the chamfer width,angles and deburring path are carried out.Then the correctness and feasibility of the path were verified by simulation.Based on the Mitsubishi RV-4FL-D-S11 six-axis industrial robotic equipment,the system of button contacts burrs removal is built,and follow-up experimental study is also carried out.The influence of the forward and reverse path and main process parameters,including the mainshaft pressure,the working engagement and the feed rate,on the quality of burrs removal are all investigated.Under the condition of meeting deburring quality requirements,the positive path is selected,and selection ranges of these three main process parameters are shown.The three-factor and three-level deburring test scheme is designed by means of the Central Composite Design(CCD)method,and then the second-order relational model is established between chamfering surface roughness and three main process parameters by using response surface methodology(RSM).According to multiple quadratic fitting of testing data,the empirical quadratic equation of chamfering surface roughness is obtained.With the multiple goals of button contacts burrs removal,better deburring quality(no edge second burrs and minimized surface roughness),higher deburring efficiency,but fewer energy consumption,the optimization model of main process parameters is established further,and optimum process parameters are obtained.The experimental result proves that the optimum combination of main process parameters satisfies the optimization targets well.