List of main vulnerable parts and maintenance points
1. Conductive nozzle
This is the most essential and frequently replaced vulnerable part.
Function: Conducts current to the welding wire and guides it into the molten pool in a fine manner.
Frequently Asked Questions:
Increased aperture wear: leading to unstable arc, sparks generated by contact between welding wire and hole wall, poor wire feeding, and poor weld formation.
Splash adhesion: Splash generated at the contact point between the welding wire and the conductive nozzle adheres to the end, blocking or changing the wire feeding direction.
Maintenance and replacement guide:
Correct selection: Be sure to use a conductive nozzle that matches the diameter and type of the welding wire. Incorrect dimensions can accelerate wear and tear.
Regular inspection: Before starting work or changing the welding wire, check whether there is any visible elliptical deformation or splashing accumulation in the aperture of the conductive nozzle.
Cleaning method: If there is a small amount of splashing, use one-on-one splashing paste to prevent it, or use a brass brush (not a steel brush to avoid scratching the inner wall) to carefully clean. It is strictly prohibited to use files or pliers to forcefully clean, as this will damage its conductivity and accuracy.
Timing of replacement: Once unstable arc, increased wire feeding resistance, or poor weld formation is found, replacement should be carried out immediately. Don't force yourself to use it just to save money, as it can damage the quality and efficiency of welding.
2. Nozzle
Function: Form a protective gas barrier, isolate air, and prevent weld oxidation.
Frequently Asked Questions:
Splash blockage: A large amount of splashes accumulate inside and at the ends, disrupting the protective airflow and causing air holes.
Thread damage: Installation is too tight or bumped, resulting in thread damage that cannot be securely installed.
Maintenance and replacement guide:
Daily cleaning: After each welding, while it is still hot, use a brass brush or wooden stick to clean internal splashes at a suitable speed (hot splashes are more likely to fall off).
Scale cleaning: For severe blockages, soak in a one-on-one nozzle cleaning solution and remove after splashing and softening.
Preventive measures: Apply splash paste evenly on the inner wall of the nozzle before welding, which can easily cause the splatter to fall off.
Check the airflow: Regularly listen to the sound of the airflow to see if it is stable. If there is a "hissing" sound or a feeling of turbulence in the airflow, check if the nozzle is blocked.
Replacement timing: When the airflow is still not smooth after cleaning, or when the thread is damaged and cannot be tightened.
3. Wire feeding hose
Function: Provide a smooth and stable channel for welding wire from the wire feeder to the welding gun.
Frequently Asked Questions:
Internal scaling/wear: Copper shavings, dust, and grease on the surface of the welding wire accumulate inside the tube, increasing wire feeding resistance and causing wire jamming and unstable wire feeding.
Discount or flattening: being squeezed by heavy objects or improperly coiled, resulting in channel blockage.
Maintenance and replacement guide:
Regular cleaning/replacement: It is recommended to clean or replace the wire feeding hose every 3-6 months or after replacing 2-3 rolls of welding wire.
Cleaning method: Remove the hose from the welding gun and wire feeder, and blow high-pressure air from one end to the other. For severe dirt, one-on-one cleaning agents and cleaning springs can be used.
Correct winding: Avoid sharp turns, maintain a natural large arc winding, and prevent dead breaks.
Timing of replacement: When there is persistent poor wire feeding, wire jamming, or when there is still no actual effect after cleaning.
4. Insulation components
Function: This insulation sleeve includes the neck of the gun, connecting body, and other parts to prevent internal short circuits in the welding gun and protect the operator.
Frequently Asked Questions:
Burn/rupture: Insulation material damage caused by splashing adhesion, overheating, or physical impact.
Maintenance and replacement guide:
Visual inspection: Regularly inspect all insulation components for cracks, gaps, or burnt marks.
Timely replacement: Once damage is found, it needs to be replaced immediately. Continuing to use carries the risk of electric shock and short circuit, which may damage the entire welding gun or welding machine.