The main reason of welding deformation is stress, which can be simply divided into internal stress and external stress. The deformation of welded components is mainly caused by uneven heating and internal stress during welding. The methods to prevent and eliminate deformation mainly include the following ideas:

1. Reduce the generation of internal stress (reduce heat input, usually weld in sections, preheat before welding to reduce temperature difference, etc. )

2. Release internal stress (welding direction and sequence, structure of welded parts, weld position, etc.). )

3. Make the internal stress offset (welding, tooling, etc. )

4. Leave deformation space (pre-deformation before welding, etc.). )

5. External force adjustment and repair

The specific control method should be considered according to the specific structure, environment, equipment and personnel skills.

I hope your problem can be solved as soon as possible!