Development Of Intelligent Welding System For Gun Tower Casing

A general concept, function and application situation of ancillary weldingequipment are introduced in the paper. The kernel of intelligent positioningsystem and mechanism of positioning machine are analyzed. The general designmethod for welding positioning machines is summarized. Taking rotary andtilting positioning machine as an example, kinematics-reversing universalalgorithm and method to get single resolution are derived. Through the analysisof mathematic model, mechanical characteristics of whole positioning system isenhanced so that the positioning accuracy and repeating accuracy are increased.On the basis of improved intelligent positioning system, the electric base israised thoroughly. The composition of PLC with transducer and encoder isutilized to realize close loop control for speed and positions and high controlaccuracy is reached. A host and followed control mode with industrialcontrollers and PLC are used to upgrade technical performance of thepositioning machine.About the control method, fuzzy control technology plus classic PID controltechnology are adopted to upgrade dynamic performance of the machine greatly.The control accuracy and responding speed are increased much.About the software design, object-orienting program design and multipleroute control technology are adopted to develop control system software suitingto welding positioning machine. The software features excellent expansibility,which provides satisfactory basis to function expansibility and intellectualupgrade of the welding positioning system and brings visible profit to lower costand shorten product development cycle. For concrete tandem communicationprotocol and sub-program of PLC and industrial controller, detail descriptionand flow chart are presented.All above are fully adopted in the development of gun tower casing, whichincreased both the welding speed and the welding quality as well. Predictpurpose is achieved.