Study On Welding Process Of Thin-Walled Arc Welding Robot Workstation

In recent years,the production level has been greatly improved with the rapid development of China’s manufacturing industry but the thin-walled structure welding is still a difficult problem to solve,this subject will be used for thin-walled tube welding robots,research robot workstations and welding technology and some other related aspects.Based on the brief analysis of the domestic and international research status of arc welding robot and thin-wall welding process,a thin-wall structure welding arc welding robot workstation is designed,The layout of the arc welding robot body,the control cabinet,the welding machine,the workbench,the gas cylinder and the parts to be welded and so on is reasonably and efficiently arranged,to ensure that the arc welding robot workstations weld the thin-walled structure high-efficiency and high-quality.The correctness and rationality of the structure of the arc welding robot are verified by the kinematics of the arc welding robot body.Welding process is divided into two stages,the first stage of manual programming using programming method for flat welding,the second phase of the off-line programming to complete the final all-position welding.In the thin-walled tube welding process research,analyzing the robot welding thin-walled tube in the process of deformation and other difficulties firstly,a special welding fixture is designed for welding deformation,welding tool fixture curve eccentric principle to achieve the welding of the workpiece to step up,the positioning of the welded workpiece in the fixture is accomplished using a six-point positioning method.In addition,the self-locking,clamping stroke and clamping force of the welding fixture were analyzed and verified.In the process of thin-walled tube welding test,the specimen is made of 20 steel and the thickness is 1.5mm,according to the change of the gap in the actual assembly process,three sets of tests were carried out in the flat test with the gap of 0.0mm,1.0mm,1.5mm,In order to simulate all-position welding,five different weldingpositions,such as flat welding,downward 45 ° welding,vertical downward welding,downward 45 ° welding and horizontal welding,were carried out in each group of flat test to obtain all-position welding process parameters.And then All-position welding of the thin-walled cylinder is carried out,and the welding parameters obtained by the plate test are respectively loaded to the corresponding positions of the all-position welding,And set a transition section at the junction of different welding position to solve the welding parameters which is caused by the weld defects such as mutations defective.After welding,the weld quality was tested and assessed,the weld quality meet the design requirements.