Algorithms And System Implemention Of Workpiece Self-localization In Magnetorheological Finishing

With the rise of the concept of "Industry 4.0" and the intelligent manufacturing technology,the advanced manufacturing equipments around the world are now in a new round of reform.As an important part of the intelligent manufacturing technology,the workpiece self-localization technology can significantly improve the efficiency of the machine tool,and save the overall processing time.Yet there are no relevant reports about the application of self-localization technology in the optical manufacturing field so far.In this paper,the theories and algorithms of workpiece self-localzation and its application in magnetorheological finishing(MRF)are studied.The main research contents are as follows:First,research on the theories and algorithms of the workpiece self-localization.The classical form of the self-localization algorithm is studied,and a new algorithm is proposed,which is named as the synchronous iteration localization(SIL)algorithm.Through simulations,different algorithms' performances are compared,and the effectiveness of the SIL algorithm is proved.Second,study the probe radius compensation and the measurement point layout optimization.The probe radius compensation in contact measurement is studied.With the establishment of a measurement point layout optimization algorithm and the localization-accuracy requirement of MRF,a strategy of the measurement point layout for optical elements self-localization is proposed.With the using of this strategy,high-accuracy localization is achieved with less measurement points in the simulation.Third,design and realize the workpiece self-localization system of the MRF machine tool.The measuring mechanism is designed with the principle of non interference in the machining and measuring movement.Requirement analysis and testing experiments for the probe are Performed.By compiling the software of the workpiece self-localization system,the automation of the measuring process is achieved,and the matching of the machining code to the pose of the workpiece is realized.Fourth,test and verify the performance of the workpiece self-localization system.The accuracy of the system is verified from the point of view of the removal function stability and the convergence rate of the optical surface error.The system's working efficiency is verified from the point of view of the time consumption of the whole localization process.The system's industry-application ability is proved by optical elements figuring experiments.