Research On Welding Words On Metal Surface And Off-line Programming Based On Arc Welding Robot

This paper explores the metal surface welding words based on robot off-line programming.Traditional manual welding has the disadvantages of low production efficiency and poor weld formation.The application of off-line programming technology of robots in ship fittings manufacturing enterprises can give the advantages of robots in complex processing paths,and greatly improve the production efficiency.The KUKA KR16 robot and Fronius TPS 5000 digital welding power supply were used to build an arc welding robot additive manufacturing system.The test material is made of Q235B steel plate with a thickness of 10mm,80%Ar+20%CO₂,solid welding wire ER50-6.In order to obtain a hollow-shaped weld with a beautiful appearance,the welding process test was carried out before welding words.After comparative analysis,it is proposed to adopt the following process parameters:wire feeding speed 2.4m·min^-1,welding speed 0.4m·min^-1 as the process specification of actual welding words.Based on the general-purpose robot off-line programming software Robotmaster,the welding experiment was carried out.The results showed that,compared with the traditional manual surfacing and lettering,by using the robot off-line programming,the quality of the glyph welds and the production efficiency are obviously improved,and the labor cost is greatly reduced.Based on the C++programming language,the software for off-line programming of the robot is developed.By inputting the information about the characters to be welded in the MFC human-machine interface window,the system can automatically generate the outline of the corresponding characters and the“dat”and“src”files that can be recognized by KUKA robot.The actual welding words experiment showed that the glyphs welded by the system are neat and round,and the shape is good,which proveed that the self-developed robot off-line programming welding system is feasible.Compared with the commercial general off-line programming software,the system has lower development cost,but achieves the same additive manufacturing welding effect.With UG as the development platform,an arc welding robot off-line programming welding words system was developed.Taking the cylindrical representative surface as the research object,the UG secondary development tool Block UI is used to establish the human-computer interaction dialog interface.By compiling the relevant UF functions to realize the information acquisition of the surface glyph trajectory,the programming of the spatial weld trajectory data extraction is developed.The system verifies the function and accuracy.The results showed that the off-line programming system based on UG secondary development can quickly and effectively extract the coordinate values of space welding points and generate the robot target program files.A set of arc welding robot off-line programming additive manufacturing system was built,under the low heat input specification parameters,the additive manufacturing experiment of thin-walled cylindrical parts and the hardness test in the height direction of the surfacing layer were carried out.The results showeded that the three-dimensional part model under the additive system is highly consistent with the actual parts;in the welding process,the subsequent welds play the role of post-weld heat treatment on the previous welds,which has a significant influence on the microstructure and mechanical properties of the weld.The research results of this subject will greatly improve the production environment of traditional manual surfacing and welding of shipbuilding enterprises,alleviate the high labor costs and labor shortages and promote the transformation and upgrading of the production model of the enterprises.