Features of Welding Robot Systems:

With advancements in electronics, computer technology, CNC, and robotics, automated welding robots have been employed in production since the 1960s. Their technology has matured significantly, offering the following key advantages:

1) Stabilizes and enhances welding quality, enabling quantitative assessment of weld performance;

2) Enhances labor productivity;

3) Reduces worker fatigue and enables operation in hazardous environments;

4) Lowers requirements for operator skill levels;

5) Shortens preparation cycles for product redesigns and reduces corresponding equipment investment.

Consequently, it finds extensive application across diverse industries.

Structural Design of Welding Robot Systems:

Given that the designed welding robot operates in quasi-planar, confined spaces, it must be compact, agile, and stable to ensure automatic weld tracking based on arc sensor deviation data. Addressing the constraints of confined spaces, this paper introduces a compact mobile welding robot. Employing a modular design approach based on the movement characteristics of each structural component, the robot mechanism is divided into three parts: a wheeled mobile platform, a torch adjustment mechanism, and an arc sensor. The wheeled mobile platform, characterized by high inertia and slow response, primarily performs coarse tracking of the weld seam. The torch adjustment mechanism handles precise seam tracking, while the arc sensor enables real-time identification of weld deviation. Additionally, the robot controller and motor drivers are integrated onto the mobile platform to reduce overall size. To mitigate dust impact on moving components in harsh welding environments, a fully enclosed structure enhances system reliability.

Maintenance of the Welding Robot System:

I. Daily Inspection and Maintenance

1. Wire Feeding Mechanism: Verify normal feeding torque, inspect wire guide tubes for damage, and check for abnormal alarms.
2. Gas Flow: Confirm normal gas flow rate.
3. Torch Safety Protection System: Ensure proper functionality. (Never disable the torch safety protection system.)
4. Water Circulation System: Confirm normal operation.
5. Test TCP (Recommend creating a test program to run after each shift handover).

II. Weekly Inspection and Maintenance

1. Wipe down all robot axes. 2. Verify TCP positioning accuracy. 3. Check slag-cleaning oil level. 4. Confirm zero-position accuracy for all robot axes. 5. Clean the filter screen behind the welder's water tank. 6. Clean the filter screen at the compressed air inlet. 7. Remove debris from the welding torch nozzle to prevent water circulation blockage. 8. Clean the wire feeding mechanism, including the wire feed rollers, wire pressure rollers, and wire guide tube.
9. Inspect the hose bundle and wire guide hose for damage or breaks. (Recommend removing the entire hose bundle and cleaning with compressed air)
10. Verify the welding gun safety protection system is functioning normally, and check the external emergency stop button for proper operation.

III. Monthly Inspection and Maintenance

1. Lubricate all robot axes. Apply white lubricating oil (grade 86E006) to axes 1–6. 2. Apply grease (grade 86K007) to the red grease nipples on the RP positioner and RTS track. 3. Apply gray conductive grease (grade 86K004) to the blue grease nipples on the RP positioner. 4. Apply lubricating oil to the needle roller bearings of the wire feed wheels. (A small amount of grease is sufficient) 5. Clean the gun cleaning device and add lubricating oil to the pneumatic motor. (Regular engine oil is acceptable) 6. Use compressed air to clean the control cabinet and welding machine. 7. Check the coolant level in the welding machine's water tank and replenish as needed. (Use purified water with a small amount of industrial alcohol) 8. In addition to completing items 1–8, perform all tasks specified in the weekly inspection.

With advancements in electronics, computer technology, CNC, and robotics, automated welding robots have been employed in production since the 1960s. Their technology has matured significantly, offering the following key advantages: