Spare part stockCalibration room Headquarters Goteborg, Sweden, founded 1979 Sensor development Manufacture & assembly Marketing and Sales Service

Global organisation Headquarters in Gothenburg. -Management -Development -Production -Service NA office in Charlotte, NC -Sales -Service Offices in the UK, Germany and Finland.

On line profile measurement in tube mills Tube Profiler™

Design Criteria Able to measure true cross section profile and not miss concave surface features Require very low maintenance & have low running costs Provide fast measurement rate Advantages over existing systems in the market Suitable for measuring large bar and tube sizes High accuracy

Shadow measurement using camera and background light Shadow measurement using laser scan micrometers Laser lines and matrix cameras Existing methods

LIMAB Method Rotating or Static optical triangulation Static optical triangulation – round bars or tubes Rotating optical triangulation – for non round bars or tubes

Static Optical Triangulation laser sensors measure distance to bar or tube Each sensor measures at 2000 Hz All sensors synchronised Fastest profile mill gauge available today

Rotating Optical Triangulation 18 sensors measure distance to bar or tube Sensors mounted on ring which oscillates +/-300 degrees Full cross section profile measured every 200 ms 1 cycle every 3.6 seconds (17 CPS)

Shadow sensor limitation

Existing Methods In summary the shadow techniques does not measure the full profile when there are concave features - To calculate the profile they have to ‘assume’ certain conditions to generated the cross section Arrows show where there is missing data

Optics CCD Detector Laser X-min X-max Optical Triangulation: Principle

The PreciCura™ laser sensor Standard ‘off the shelf’ product Accurately measures distance High performance Fast measurement 2000 Hz Rugged Industrial sensor

Profile measurement

Movement compensation Patented movement compensation algorithm CAN-bus communication with measurement server. All sensors synchronised

The Tube Profiler™ system

System Scope

Frequent calibration not required and can be completed in 5-10 minutes Tube Profiler Calibration Method - Static Gauge Calibration tool has 3 reference diameters and rotates in measuring region Method - Oscillating Gauge Calibration tool has round and rectangle reference masters. Gauge rotates calibration masters fixed.

Connection panel With quick change connector, controls and air purge inlet.

8-18 PreciCura sensors CAN-bus communication with measurement server. All sensors synchronised Measurement wheel

8 PreciCura sensors CAN-bus communication with measurement server. All sensors synchronised TubeProfiler 8 Static lasers

Frame controls side

Pyrometer Measures the temperature of the bar as it passes through the frame. Used for cold conversion calculation of profile data.

Encoder 4096 pulses per revolution. Angular resolution: 0.1°. CAN-bus communication. (oscillating version only)

Servo motor and gearbox Oscillates the wheel ± 300° Rotation speed is approximately 17 rpm. Keeps track of wheel position, rotation direction acceleration and deceleration. (oscillating version only)

Lifting table Automatic positioning of the measuring object in the center of the gauge ± 50mm in height.

Operator Screen, Round material

Operator Screen, Diameter & Ovality

TubeProfiler Statistics.slb files Records all the data measures for each tube or bar and saves as an.slb file Contains all the data that is used to compile the 2D & 3D graphs on the operator screen. Archived files can be ‘replayed’ on the Tube Profiler software.txt summary files Records 26 separate key values for every tube. Files can be read by MS Excel or other software. Includes header information, tube ID, tube no., date, time and target size. For each tube the following data will be calculated: min, max, avg., max ovality, avg., ovality, tube temp, length (option) Cp & Cpk.

Operator Screen, Flat material

Operator Screen, Trend graphs

Operator Screen, Diameter & Ovality

Measurement Range  20 <  < 700mm Measurement Range (square, hex,..) x mm Measurement Range (flat, T x W)5..50 x mm Measurement cycle ms Measurement system uncertainty   (round bars < 300mm)) Bar temperature< 1200  C Environmental temperature15 – 25  C (temperature where cooling air is taken) Specification Note: HotProfiler can be supplied for measuring larger bar sizes

HotProfiler at bar rolling mill

HotProfiler Video courtesey of Ovako Hofors, Sweden

Easier to make setup of the mill and the possibility to record results in a database for further analysis. Comments from our HotProfiler customers

The downtime in the mill is reduced because it is easier to take decisions whether the rolled product is within tolerances which means reduced the start-up time.

This product is very reliable and easy to use with a minimum of maintenance. It is an exceptional tool for the operational people in the mill as well as for the process engineers and the marketing department which can follow up the result from the rolling of the products. Comments from our HotProfiler customers

Summary Probably the fastest profile measurement systems available True profiles – La ser based optical triangulation measurement ensures accurate and reliable measurement data, not calculated profiles.

Summary Full monitoring of the process – Immediate product and process feedback – Allows for quick recognition and response to out-of tolerance features – Reduces waste caused by non-conforming production – Reduces time and waste at product changes

Summary Compact design – Easy to install and move in an existing line – Easy to maintain Network capabilities – Easy to download parameters – Easy to get reports Designed for hot rolling mill environment

HotProfiler™ some references

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