Robot Groove Angle Welding Technology Research

In the actual welding production process, there is often a change in the angle of thewelding groove. Primal problem of that is the weld groove angle will change as spatiallocation changes. That leads to the complex and changeable welding deformation. Undernormal circumstances, it is welded by Manual CO2Welding. But there are some problems:low productivity, poor welding quality, the production environment is poor, thus formingeffect of welding is often poor, and so on. To solve these problems, we decide to use robot.So we must solve the problem of "Robot Change Groove Welding".This paper is to appear in the actual welding bevel angle of the welding variables, andproposed use of arc welding robot welding groove angle changes. We analyzing the resultsand find out various process parameters on the changing slope mouth robot welding processand molding analysis the influences of the experimental results, and to play a guiding role inSubsequent experiment.Groove processing on12mm thick Q235B to Marine steel plate according to therequirements of the experiment and according to different angles groove divided into eightgroups experiment. We choose MAG as the welding way According to the changing slopeof the robot welding steel mouth requirements. By changing the current, voltage, weldingtorch swing and welding speed way parameters we make and optimize the processparameters of Robot Change Groove Welding. In guarantee weld beauty, keep the multilayermulti-channel welding layer of consistent, and ultimately more than basic same high weld.After experiments we found that Robot Change Groove Welding is very sensitive to thechange of angle and blunt edge and is extremely high to groove processing quality, plank ofthe assembly and render welding technology requirements. For smaller Groove Angle steelplates(40°~60°) the assemble is to ensure that2mm roots clearance, without blunt edge.The gap of the plates which have large bevel angle (60°to90°) should be controlledbetween1mm to1.5mm, with1mm blunt edge left.The mathematical analysis and experiments confirm that, in order to obtain wellwelding effects, the weld heat input should be in proportion to the tanα/2(α is the bevelangle) in the condition of almost the same welding speed and thickness of transition layer.In the process of covering the surface, the current of the groove welding of which bevelAngle changes from40°to90°is generally from180A to225A, with the weldingspeed of0.1m/min. The appearances of weld are fine, and the roots are gentle, basically with no need for polishing after welding.Compared with the original hand-welding process, the robot welding process possessesbetter appearances of weld, more stable welding quality, and the productivity is greatlyincreased at the same time, which acquires great social and economic benefits.