| In pipeline construction, now, the welding technique of adopting and the pipeline welding equipment of use has affected efficiency and the quality of pipeline construction. This paper is taking raising welding efficiency and welding quality as goal , has offered a kind of dual torch external welding machine, control design scheme of welding torch pipeline completely location automatic welder , and for sheet surface weld two-sided shape technology have carried out thorough research. 1. Mechanical structure of dual torch external welding machine : The overall structural Electromechanical unifinication that has carried out system is designed. It is of actuating device that mechanical system walk mainly from welding pushcart ( include welding machine and automatic locking walk system ) , wire speed part and the partof welding torch swing , and posture adjustments of welding torch. To sustains all movements by the structure in complete welding course. The design of mechanical structure has embodied the coordination between each other of Electromechanical as well as the perfect of control way fully to match. 2. Control system of dual torch external welding machine: 1 ) handle ability and the degree hardware logic structure of high density of CPLD ( complex but programming logic device ) using the high speed signal of DSP ( with high speed digital signal processor ), the volume of R&D is little , the digital sport controler for special purpose of high integrated degree. 2 ) adopt PDA ( palmtop computer, ) as hardware programming tool, built-in operating system of Palm OS is software platform, C language is software development tool, develop a kind of realization welding parameter and control parameter the editor ware that is put and modified in advance and is downloaded. 3 ) with assembly language or the language of ANSI C, compile sport control software and pair to weld torch welding technology software , is the focal point of software in which the word PID algorithm and three times batten interpolation algorithm of number of axle. 3. Welding technology of dual torch external welding machine: 1 ) develop a kind of control interface for special purpose, this interface and the welding( root weld the welding power source as well as general welding power source for special purpose) coordination of power source, control efficiently Rong drop transitional and line energy input, guarantee single surface to weld the enforcement of two-sided shape technology. This is single surface weld the key of two-sided shape technology success or failure. 2 ) pair welds first voluntarily welder skill, should include double-deck layer upon layer 0to weld , monolayer row weld with single surface weld two-sided shape root weld. In technology research focal point should put in weld become type, weld mechanics performance and single surface weld two-sided shape root weld 3 aspects. Will study summary especially in different orifice group for precision condition take off , implement single surface to weld the two-sided shape technical and technology effect of welding thoroughly. The goal of realization is: In scene, the orifice group that can realize implements single surface for precision condition to weld the two-sided shape technical condition and technique that welded thoroughly. Through welding experiment of dual torch external welders of pipeline, dual torch external welders of pipeline completely location automatic welder, have solved the welding baffling problem of thick tube wall and the mouth of V model from foundation. With pair weld first layer upon layer to weld and get typeset weld , it is effective to have raised welding speed and efficiency. Through last position machine, it is simple and convenient to be able to operate according to actual condition modification welding parameter. Entire system have from examine with information detection function, can development show welding speed, voltage and the potential in welding course. The technical advantage that pair has for welding torch pipeline completely l... |
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