Roll Welding Steps

Pre-welding Preparation: A Solid Foundation is Crucial

Just like building a house requires a foundation, the pre-welding preparation of the rolls directly affects the welding quality:

 

Surface Treatment: Grind the welding area with a grinding wheel to remove oxide layers and oil stains, revealing the metallic luster.

 

Preheating Treatment: Heat the rolls to a suitable temperature to prevent cracks during welding.

 

Beveling: Process the appropriate bevel shape according to the roll material and thickness.

 

Welding Operation: Remember the Key Techniques

This is the core of the entire welding process and requires special attention:

 

Welding Material Selection: Match the welding rod or wire to the roll material.

 

Welding Sequence: Use segmented symmetrical welding to avoid localized overheating and deformation.

 

Parameter Control: Current, voltage, and speed must be coordinated.

 

Interlayer Cleaning: Clean the weld slag after each layer is welded.

 

Post-welding Treatment: Details Determine Success or Failure

The post-welding treatment is equally important:

 

Slow Cooling Treatment: Wrap the rolls in insulating material to allow them to cool slowly.

 

Stress relief: Residual welding stress is eliminated through heat treatment.

 

Quality inspection: The internal quality of the weld is inspected using a flaw detector.

 

Finishing: The welded area is turned or ground to restore dimensional accuracy.