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Aug . 05, 2026 09:48
A Shear and Welder is installed in the entry section of an ERW tube mill, typically between the decoiler and the strip accumulator.
Its primary functions are:
✅Cut the tail end of the previous coil
✅Cut the head of the new coil
✅Align both strip ends accurately
✅Weld the two strips together
✅Allow continuous production without stopping the tube mill
Without a reliable coil joining system, every coil change would require stopping the entire production line, greatly reducing productivity.
An Automatic Shear and Welder performs nearly the entire coil joining process automatically.
After the operator loads the strip, the machine automatically completes:
The welding parameters are controlled by a PLC, ensuring stable weld quality and excellent repeatability.


A Semi Automatic Shear and Welder combines manual operation with automatic functions.
The operator manually positions and aligns the strip ends before the machine performs shearing and welding.
Compared with a fully automatic system, it has a simpler structure while still delivering reliable weld quality.


| Feature | Automatic Shear and Welder✂️ | Semi Automatic Shear and Welder⚡ |
|---|---|---|
| Automation Level | Fully automatic | Partially automatic |
| Strip Alignment | Automatic | Manual |
| Welding Process | Automatic TIG welding | Semi-automatic TIG welding |
| Production Efficiency | Higher | Medium |
| Operator Requirement | Low | Moderate |
| Labor Cost | Lower | Higher |
| Investment Cost | Higher | More economical |
| Welding Consistency | Excellent | Good |
| Best for | High-speed production | Medium-speed production |
Selecting the correct machine depends on your production requirements rather than simply choosing the highest automation level.


To recommend the most suitable coil joining system, manufacturers typically require:
These parameters help determine the appropriate shearing capacity, welding system, clamping force, and automation level.
Compared with conventional joining methods, Automatic TIG Welding provides several important advantages:
For modern ERW Tube Mill production lines, TIG butt welding remains one of the most reliable and widely adopted coil joining technologies.
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