Research And Application Of Wedm Technology Based On Cloud Manufacturing

As an important part of special processing technology,wire cut electrical discharge machining(WEDM)plays an important role in mold processing,manufacturing of precision parts,aerospace engineering and other fields.At present,the interpolation and motion control is synchronous in the common WEDM systems.It is difficult to run complex interpolation algorithm and achieve mutual collaboration between devices.In addition,WEDM needs to control more parameters,so it is difficult to achieve better results only by experience.To solve the above problems,this dissertation applies cloud manufacturing technology to WEDM equipments,rebuilds WEDM numerical control system(CNC),develops prototype and carries out experimental research.Aiming at the difficulty of running complex interpolation algorithm in WEDM CNC system and the difficulty of collaborative work between devices,the WEDM CNC system is divided into server,processing terminal and client.The NC code analysis,interpolation algorithm,speed planning and other tasks run on the server.The processing terminal parses the data packet sent by the server,which is used to control the position of the platform motor and start and stop the equipment such as oil pump,lighting,cooling fan.The architecture of the system changes the control mode from traditional synchronous mode to asynchronous mode,so we use the "ping-pong" buffer mechanism to reduce the impact of network delay on the control performance of the system,and realizes the short-circuit backoff function on this basis.The workpiece processing experiment using WEDM cloud platform proves that the system can run stably and reliably.This architecture reduces the difficulty of development,improves the utilization rate of hardware resources and reduces client performance requirements.Computing resources of cloud servers can be used to run complex interpolation algorithms and realize communication between devices.This architecture has strong practical application value.In order to solve the problem that the processing parameters of the WEDM machine are difficult to determine,the processing parameter acquisition board is designed in the processing terminal.The state information in the processing process is uploaded to the server,and the intelligent algorithm run on the server to realize the processing parameter recommendation,fault diagnosis,performance evaluation and so on.These enhance the user and developer experience.