Online Surface Quality Inspection System for Casting Billet (Eddy Current)

ZSQ-T100 Online Surface Quality Inspection System for Casting Billet (Eddy
Current)





The principle of the system

The ZSQ-T100 online surface quality inspection system for casting billet
adopts the principle of eddy current non-destructive testing. According to
the section of the continuous casting machine and the shape of the casting
billet, the eddy current sensors of different structures can be used to
realize the non-contact surface defect detection on the surface of the
billet, and draws the surface defect graph of the billet in real time
according to the detection results.



The composition of the system

Detection frame: The detection frame is used to support the central
detection sensor. The height of the detection frame can be adjusted
automatically by the motor, so that the central detection sensor is aligned
with the casting billet to be inspected.
Front and rear vertical nip roll device: The front and rear vertical nip
rolls are used to make the inspected billet pass through the central
detection head at an even and stable speed. The pressure roller is double
pushed by the cylinder and the spring.
Central testing host: The central testing host is placed on the testing
table. It has a four-sided control disc that scans the surface of each
casting billet.
Descaling device: It is used to remove the oxide scale on the surface of the
casting billet and eliminate the influence of noise on the eddy current flaw
detection.
System console: used to control the equipment and the entire testing
process, control the mechanical actions of each unit and adjust the
instrument parameters. It can realize automatic flaw detection online
detection.
Sensors: Slabs generally use eddy current sensor arrays to test the surface
quality of the casting billet. Square billets, round billets and shaped
billets generally use through-type eddy current probes to test the surface
quality of the casting billets.


The main technical index of the eddy current testing on the surface of
continuous casting billets

1. The objects of flaw detection: slabs, round billets, square billets and
shaped billets of various sizes.

2. The steel grade of the casting billet: ordinary low-carbon steel or alloy
steel.

3. Detection temperature: 400~1000℃.

4. Detection speed: ≤3~40m/min.

5. Allowable speed fluctuation range: 0~40m/min.

6. Detection of defect types and sizes: scratches with a depth or height
greater than 1.5mm, wrinkled skin lines, cold splashes, bumps, pits and
longitudinal facial cracks, transverse cracks, mesh cracks, and subsurface
inclusions with a depth greater than 3mm.

7. Blind spot for flaw detection at the end of the casting billet: 25mm.

8. Detection frame area: ≤3m (transmission line direction)

Minimum Order: 1 pieces

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