Steel Inspection

JLI Steelworks Inspection Systems are custom designed turnkey solutions for measuring dimensions, shapes, surface defects and flatness in both the hot and cold end. All equipment is designed for the relevent environment. This can include water cooled and air blown camera housings suitable for operation at temperatures exceeding 200oC.

General features/benefits of JLI turnkey systems include:

  • Custom made
  • Adapted to existing production lines
  • Internet connectionExcellent reliability track records
  • Special applications

Examples of Systems Commisioned by JLI

JLI Steel figure 3

Character Reader

A single or multiple camera system can be trained to read dot or spray marking on steel products. Installed after the marking machine the system is used to verify the marking. At other points in the process the products will automatically be identified.

  • Single or multiple camera operation
  • Automatic reading
  • Flexible recognition rules
  • Verification of marking quality
  • Interface to Mill computer
JLI Steel figure 7 2

Plate Flatnesss Inspection

Plates cut to customer size are measured for flatness.The vision system is installed after the shear where the relative elevation of the surface is measured and a graphical map of flatness is produced. Plates outside specifications are detected.

  • Compact design, max. height 2 m
  • Accuracy better than 1 mm
  • Accept/reject signals to shear operator
  • Interface to Mill computer
  • ADSL connection for remote monitoring and control
  • Light system by standard street lighting: Life time > 3 year
JLI Steel figure 4

Bloom Cropping Inspection

The bloom cropping system covers the area at the shear and measures the distance from the shear to the end of the material. The system recognizes pointed ends or fishtails, and has several algorithms to recognize the extreme point of fishtails or eliminate git ends.

  • Single or dual camera
  • Automatic detection of arriving bloom and shear operation
  • Displays tailored for pulpit requirements
  • Interface to Mill computer
  • Automatic recording of discarded lengths with time and date

Slab Gauge

The slab dimension systems are typically installed before the primary mill. At this location the system can be used to check the slab size before the first pass.

  • Single camera operation
  • Camera installation away from the hot environment
  • Software to prevent false measurements due to steam
  • Fast continuous operation
  • Displays tailored for pulpit requirements
  • Interface to Mill computer
  • Remote control
  • Accuracy +/- 2mm

Bar Length Gauge

The cameras are placed above the cooling bed on the outside of the roof. The system detects when the bar is moved from the roller lane to the walking beams. Reference marks are used for calibration in every measurement cycle.

  • Self calibrating
  • Easy access to the cameras also during production
  • Accuracy on a 100 m bar is 25 mm
SlabCasting corus

Slab Concast Inspection

The speed and dimensions of concast steel are normally measured mechanically. The JLI system eliminates the contact wheel and manual measurement procedures. The accuracy is 0.1% on speed, 0.5 mm on thickness and 2 mm on width. This data and information on specific gravity enables the steelworks to cut slabs to exact weight.

  • Non contact measurement in the harsh concast environment
  • Interface to Mill computer
  • Clamp signal based on weight calculations
  • Accuracy: 100 kg on a 20 tonne slab, all included
JLI Steel figure 6

Section Profile Inspection

Section profiles are measured using structured halogen lights and cameras. The system operates on hot or cold sections.

  • Instant precise measurement of profiles in the rolling process
  • No use of lasers and therefore no protection issues
  • Cooling water and scale disturbances are eliminated by software
  • Systems tailored for the individual steel mill requirements
  • Integration techniques for high precision measurements

Brake Pad Inspection

  • Unit installed trackside to increase frequency of real-time imaging
  • Accurately measures brakes from 0 to 100 mp
  • Strobe light source provides sharp images
  • Units protected from the environment with air pressure hose ensuring a constantly clean lens
  • Quick release coupling for trackside maintenance with no interference to service

Rail Surface Inspection

Moving at up to 4 m/s and in the hot end. Rails can be surface inspected and characters read. Using optical filtering images are enhanced making the rail visually appear as cold. As the rail enters the camera ring, images from up to 7 cameras are recorded.

  • Stand alone unit
  • Inspection performed at the hot-end, < 900o C
  • Replaces physical sample inspection
  • 360 inspection - no turn mechanism needed
  • Instant detection of errors down to 1 mm
  • Automatic detection of reoccurring defects