How to deal with air hole during robot welding and what is the cause of it?
Causes of air hole:
The reasons for the appearance of porosity in the welding process can be divided into external causes and internal causes, external reasons mainly include environmental factors and improper use of operators, in the welding process, due to poor protection, resulting in gas into the molten pool, in the process of denunciation cooling gas can not be discharged, resulting in the emergence of porosity inside the workpiece, and then the surrounding air if too humid, will also lead to the workpiece performance of porosity.
The arc of welding robot is too long, which will cause air to enter and generate nitrogen pores, poor surface cleaning, oil rust, etc. will generate hydrogen pores, or carbon monoxide pores. According to the shape and color of the formed pores, we can determine which kind of pores are. According to the process and material, and the shape and color of the pores, we can analyze the specific reasons.
The Yellow pores are generally nitrogen pores, the small bright white dots are hydrogen pores, and the larger pores with the size rising are mostly carbon monoxide pores.
The internal causes include unreasonable selection of welding equipment and welding parameters. The equipment is mainly caused by insufficient shielding gas pressure, unstable flow and impurities around the weld.
Measures to solve air holes
1. Keep dryness in the welding environment, use closed gas for welding, close the surrounding ventilation facilities, and ensure that there is no large air flow in the welding environment, so as to reduce the incidence of internal pores.
2. Before work, it is necessary to clean up the impurities around the welding seam of the welding gun and the oil contamination in the working environment, so as to prevent more than correction and effectively reduce the welding defects.
3. In case of problems in welding parameters, it is necessary to stop the welding robot and adjust the welding parameters according to the quality of the weldment until the welding quality is qualified.
4. Enterprises need to regularly train welding workers to understand the operation process and maintenance measures of welding robots and constantly improve their skills.
When air holes occur in the welding process, it is first necessary to analyze the causes of air holes, check them one by one, find out the problems, and then make solutions to help the welding robot achieve stable welding, improve the production efficiency of the enterprise and reduce the output cost.