Design And Development Of Automatic Welding Robot Based On PLC

In the process of industrial production modernization,welding robots have the most rapid development and the most extensive application due to their stable welding quality,high production efficiency,and large actual demand.At present,the technology of welding robots from product design and development to production and application is quite mature,but most of them are implemented using PC+ motion control card or DSP embedded controllers to control servo drivers.Because of poor scalability and high cost,it is not conducive to follow-up development [1].With the rapid development of automation technology,especially PLC technology,for the optimization of motion control software and the strengthening of remote network functions,it has been possible to achieve multi-axis parallel motion control.The application of this technology to the development of welding robots has the advantages of low cost,good ductility,and easy maintenance.The main research content of this paper is to design a welding robot that can automatically weld heat exchange sheets,which can meet the actual production requirements of enterprises,and at the same time help enterprises reduce labor costs,increase production efficiency,and reduce scrap rate.Based on the above design requirements,a reasonable robot control solution was developed through theoretical analysis.According to the plan,the mechanical structure design of the robot is first completed,and then the selection of PLC,drive system,touch screen,and reducer is performed.Then the system is configured using the TouhWin configuration software according to the selected components,and then the XDPPro supporting the PLC is used.3.1.3c The software completes the motion trajectoryprogramming of the entire system.Finally,a touch screen control system is used to complete the simulation movement and verify whether the welding movement trajectory is correct and optimize the movement parameters at the same time.The test results show that the automatic heat-exchange sheet welding robot designed in this paper basically meets the enterprise's production requirements.Among them,because the selected PLC cannot perform Cs contour control to a certain extent,the quality of the welding is affected.This solution uses linear interpolation to compensate for hardware shortages.Later,the hardware can be updated to further optimize the design.Although PLC-controlled rail welding robots have a certain gap between the control precision and the joint robots,the economy and extensibility of this simple welding robot are superior to the joint robots,and there is still a large market space in the later period.