Repair Methods
1. Welding Repair Method: The damaged area is filled by welding, and then the positioning hole is re-machined. This method is suitable for severe damage, but caution is needed as the welding process may cause heat damage to surrounding components. It must be performed by a qualified technician.
Key Points of Operation:
Clean the damaged area until it has a metallic sheen.
Preheat the welding area to 60–80℃.
Use multi-layer, multi-pass welding, controlling the interpass temperature at 120–150℃.
After welding, the positioning hole must be re-machined to the standard size.
2. Sleeve Repair Method: A metal sleeve (such as a copper sleeve) is inserted into the damaged positioning hole, and then the hole is re-machined. The repair effect is good, but the operation is complex and costly.
Key Operating Points:
Select a metal sleeve that matches the hole.
After welding and fixing, re-tapping or machining is required.
Ensure the sleeve is firmly bonded to the base.
Precautions:
Precision Control: After repair, the positioning seat must be re-leveled using the adjacent reference hole (e.g., φ80mm hole) as a reference, ensuring the error is ≤0.1mm.
Process Support: Process support components must be installed before welding to reduce the impact of welding deformation on the overall structure.
Professional Operation: It is recommended that this operation be performed by qualified welding technicians to avoid secondary damage due to improper operation.
