Repair Equipment And Technology Research Of Rolling Mill

In view of the problems the inconvenience of lifting and the long downtime encountered in the repairing process of the mill gate,and the fact that the ordinary mechanical processing equipment can not complete the online maintenance of the mill arch,so the paper studies a rolling mill arch repairing equipment.The equipment is mill repairing parallel milling root,which can solve the high-altitude operations problems,corner machining problems,working conditions problems and other practical problems.Through the summary and analysis of different restoration methods of mill arch,the specific repairing plan was selected.Based on the working space and environment of the repairing task,the overall structure scheme of two high-speed milling robots driven by two active arms was chosen.The paper designed specific dimensions of each part structure,and analyzed the whole structure degrees of freedom were designed.The kinematics model of the milling robot was constructed,and the model of kinematics forward and inverse were deduced by the theoretical analysis.At the same time,the singularity analysis was carried out,which lays the foundation for the design of the milling robot control system.Based on the basic requirements of processing operations,the paper chose built-in motor spindle driving system,which is milling spindle.According to the analysis and calculation results,the design and calculation results of milling-related parameters were carried out.The main transmission system,bearing,reducer,servo motor and other components were selected.Based on the static characteristic of the mill repairing equipment,the 3D model of the milling robot was carried out.Then the static and dynamic analysis of the milling robot working state and the non-working state were carried out respectively based on ANSYS Workbench software.Then the strain,stress and overall deformation cloud of the milling robot were obtained.According to the results,we can see the strength requirements of structural design.The modal analysis of the structure of the robot is carried out.The first eight natural frequencies and modes are taken into account to study whether the external excitation frequency coincides with the natural frequency of the structure and the structural design is reasonable or not.The simulation of the critical turning process of the model is carried out by using ADAMS software.The simulation curve and parameters were obtained to test the interference condition of the structure.The feasibility and accuracy of the scheme were investigated,which can help to select the robot arm servo system and optimize the mechanism.And finally the paper researched mill repairing process to ensure the successful completion of the repair work.