Construction Of PCD Blade Intelligent Grinding System And Research On Visual Compensation Of Grinding Wheel Wear

In recent years,with the rapid development of the manufacturing industry,the requirements for the material properties of products are getting higher and higher,so there are higher requirements for the technical level of the tools.PCD tools have become the current high-speed tool due to their excellent performance.A must-have tool for cutting.Aiming at the problems of low efficiency and low degree of automation caused by the manual grinding of manual grinding machines in the current blade grinding steps in the preparation of PCD tools,this paper builds and implements an intelligent PCD blade grinding system based on machine vision,which can Tool identification,grinding process planning and automatic compensation for grinding wheel wear during the grinding process are realized under visual guidance,which greatly improves the production efficiency and automation of PCD blade grinding.The main research contents of this paper are as follows:（1）Construction of the overall scheme of the system.Aiming at the problems and practical application requirements of PCD blade grinding,the overall scheme of the system is built.The system is divided into three parts: control system,execution system,and vision system.The composition and functions of each part of the system are introduced.The system’s automatic grinding workflow.（2）Research on visual compensation of grinding wheel wear.In view of the problem that the grinding wheel wear in the grinding process seriously affects the grinding quality,combined with the specific requirements of the grinding wheel wear compensation,the design scheme of the grinding wheel wear visual compensation was completed,and the hardware required for the grinding wheel wear compensation was designed and selected,and finally completed.Calibration of the camera.（3）Research on the key algorithm of visual compensation for grinding wheel wear.Aiming at the requirement of high-precision edge contour extraction by visual compensation of grinding wheel wear,an improved Canny edge extraction algorithm based on Otsu’s adaptive threshold is proposed,which avoids the error caused by manually setting the threshold,the results show that the edge contour of PCD blade extracted by the improved Canny algorithm can better meet the accuracy requirements of the system.（4）Design of PCD blade grinding and grinding wheel wear compensation control system.The position-based visual servo control strategy is adopted,and PLC is used as the core of the control system.And according to the functional requirements of the control system,the I/O assignment of the PLC was completed and the corresponding control program was designed.Finally,the communication network based on the Modbus protocol was built,and the corresponding man-machine interface was designed to realize the information exchange between the systems.（5）System debugging and analysis of grinding wheel wear compensation results.Based on the design scheme proposed in this paper,the PCD blade intelligent grinding system is implemented,the main functions of the system software and hardware are debugged,and the grinding experiment test is carried out for the PCD blade.The results show that the PCD blade grinding dimensional accuracy after adding the grinding wheel wear compensation Compared with no addition,the average increase is 40.46%,and it has better stability.