Line-Magna (LM)
This system performs in-line surface flaw inspection of steel billet utilizing fluorescent magnetic particle testing method while the billet being transferred on the V-roller conveyor. All surfaces and corners of the billet is visually inspected and marked by inspectors for removal in the grinding process later.
Features
- In-line continuous inspection during the billet being transferred
- Low equipment cost, less installation space
- Flaw inspection can be done by two inspectors. This is less than one half compared to required number of inspector of Axial electric current magnetization method.
- Detecting longitudinal, transverse and corner defects simultaneously
| Main Specification | |
|---|---|
| Type of steel to be inspected | Carbon steel, Low alloy steel and Special steel |
| Dimension | Square billet 120-160 mm sq. |
| Billet transfer speed | Max. 15 m/min. (V-roller transfer) |
| Magnetizing method | Combined magnetization with Yoke coils and Ring coil |
| MPT material | Fluorescent magnetic particle suspension |
| Defects to be detected | Surface breaking natural flaws (crack, scab etc.) |
| Detecting accuracy | Longitudinal flaw (crack): more than 0.3 D x 10 L mm Transverse flaw (scab) : more than 0.3 D x 10 dia. mm |
| Electric power | AC 400/440 V±10%, 3-phase, approx. 150 KVA |
| Air | More than 0.4 MPa, 5.0 Nm3/min. Normal consumption : approx. 0.8 m3/min. |
| Water | Service water 100 L/min. |
| Main Equipment | |
|---|---|
| Suspension spraying equipment | Suspension spray nozzles |
| Magnetizing equipment | (4 sets of Yoke coils and one Ring coil) x 2 sets |
| Suspension tank | 500 L tank with circulation pump |
| UV light | Super-Light E-40-2 x 8 sets, Mirror units |
| Control equipment | Control panel, Magnetizing power source panels, Local operation panel |
Inspection Procedure
