Control System Design Of Pipe End Cutting Based On PLC

At present, the main control way in automatization field are relay controlrol,microcomputer control and PLC control.Programmable Logic Controller is a kind of universal industrial control appratus which is develop rapidly and used widely in recent years,taking microprocessor as its core.Compared with the relay control system and the microcomputer control system,the PLC control system has a series of advantages,such as little work load of designing,installing,wiring and debugging,short cycle of development,high dependability,flexible application and easy maintenance. It reflect high anti-jamming capability,especially under the harsh conditions of the factory. PLC has become a robust tool to realize industrial automation.With the background of practical project, aiming at cutting problem of space curve inshipbuilding industry, a main robot control system was designed to control intelligent nodesof the lower computes. The digital control system discussed in this paper is a control based onPLC. The article designed and developed a control system that is suitable for tube end cuttingrobot, combined the characteristic of control system and the application of generic numericalsystem, control systems overall program design. Communication solutions for the system,modular process for the function of hardware and software has been done according to theoverall system requirements. The PC computer is served as the superior chip and PLC madein OMRON company is acted as the subordinate chip. RS232buses is used as the datatransfer mode from the superior chip to the subordinate chip.The control system achieves thecontrol of four dof step motor.The major content of the work: research the control system under the crew (PLC)control program design and the communation between superior chip and subordinate chip.Focus on the working principle of control system,hardware part,list the CP1H instructionsystem, programming languages and programming steps, PC and PLC serial communicationprinciple and Implementation.Analyse the CXP programming language and programmingideas.Use OMRON PLC development software CXP to prepare the subordinate chip’s userprogram to control of multi-axis joint movement to cut the end of pipe.The part of surperiorchip,using VC++development platform for the preparation of man-machine interface,themain function is to the user of the cutting parameter input through the algorithm forconverting each axis of movement parameters,including pulse volume and frequency,with theuse of MSComm control,write data transmission block obtained parameter download to PLC data memory.while PLC exercising program,axis of movement memory region extractionmotion parameters.made the shaft under certain conditions for joint movement,according tothe line of intersection space trajectory.This system has the advantages of small volume, reliable and stable performance,convenient operation and maintenance; programming interface is friendly, good work. It canbe applied to a cylindrical tube end cutting operation...