During the actual welding production process, welding robots are likely to cause deformation of the welded parts, which is a key issue that many customers are concerned about. Of course, there are many factors that can cause problems with such welded components. To address customer concerns, the following is how to avoid them.

In general, the basic forms of welding deformation generated by welding robots include shrinkage deformation, angular deformation, bending deformation, wave deformation, and twisting deformation. During the welding production process of welding robots, uneven heating and cooling of welding components is the fundamental cause of welding stress and deformation. What should I do if there is welding deformation during the use of a welding robot?

The main process measures to reduce welding stress and deformation of welding robots include:

1. Reserved shrinkage deformation

Based on theoretical calculations and practical experience, shrinkage allowance is pre considered during the preparation and processing of welding robot weldments, in order to achieve the required shape and size of the workpiece after welding.

2. Rigid fixation method

When welding robots, the welding parts are rigidly fixed. After welding, the rigid fixation is removed after the welding parts have cooled to room temperature, which can prevent angular deformation and wave deformation. This method will increase welding stress and is only applicable to low-carbon steel structures with good plasticity.

3. Anti deformation method

Based on theoretical calculations and practical experience, pre estimate the direction and magnitude of welding deformation in the welding robot structure, and then provide a preset deformation with opposite directions and equal sizes during welding assembly to offset the deformation generated after welding.

4. Choose a reasonable welding sequence

Try to allow the weld seam to contract freely. When welding structural components with a large number of welds, welding robots should first weld staggered short welds, and then weld straight long welds to prevent cracks from occurring at the joint of the welds. If the weld is long, the gradual back welding method and skip welding method can be used to make the temperature distribution more uniform, thus reducing the welding stress and deformation.

5. Heating the "stress reducing zone" method

Before welding, the welding robot heats the area near the welding site (stress reducing zone) to elongate it. When cooled after welding, the heating zone contracts with the weld seam, effectively reducing the welding stress and deformation of the welding robot.

6. Hammer weld method

During the cooling process of the weld seam, a round headed small hammer is used to evenly and quickly strike the weld seam, causing plastic extension deformation of the metal, offsetting some of the welding shrinkage deformation, thereby reducing welding stress and deformation.

7. Welding robot preheating before welding and slow cooling after welding

The purpose of preheating is to reduce the temperature difference between the weld zone and other parts of the weldment, reduce the cooling speed of the weld zone, and enable the weldment to cool down more evenly, thereby reducing welding stress and deformation.

In summary, in order to reduce and reduce the occurrence of workpiece deformation, the above methods can be used for standardized operations when using welding robots for welding, thereby improving the yield of welded workpieces, reducing production costs for enterprises, and achieving greater benefits.