Width Measurement for Camber detection
Contact based length measurement. Inaccurate and manual process was not practical for continuous casting mill. Non-contact laser distance meter to work on hot surface upto 1300°C. 200°C ambient temperature with water cooling. 3nos of digital output and 1nos of Analog (4-20mA). Works on even dark surface (gray slabs).
Pilger mill in tube rolling mills - hot and cold pipe detection
Accurate width measurement for camber detection.
- Precise measurement : +/-1mm accuracy with 2σ
- Stainless housing with double walled cooling for ambient temperature upto 200 °C
- Works on product surface upto 1300 °C
- Analog and digital outputs
Challenges
- Contact based length measurement
- Inaccurate and manual process was not practical for continuous casting mill
- Slab hitting the tunnel furnace refractory causing unplanned breakdown
Solution
- Non-contact laser distance meter to work on hot surface upto 13000C.
- 200C ambient temperature with water cooling
- 3nos of digital output and 1nos of Analog (4-20mA)
- Works on even dark surface (gray slabs)
Products and Accessories
Technical Specifications
- Accuracy ± 1mm
- Repeatability ± 0.3 mm
- Measuring ranges up to 100 m on natural surfaces
- Measuring ranges up to 500 m on reflective foil
Case Study Number
- TP3
Challenge
- The increasing flexibility of production lines requires a high adaptability of sensors. Continually changing object geometries, different temperatures and very high radiation or surrounding temperatures are no rarity.
- In a pilger mill those rough conditions can be found, among others in the production of seemless steel pipes. The raw steel blocks, each weighing a few tons are heated up first in a round oven at a temperature of 1300 °C.
- After descaling of the surface, the steel block is prepunched in a hole press with a strength from a converted 2000 t. In the next sloping rolling mill the growing pipe rotates between two rollers that are positioned at an angle to each other. The punching is widened to the size of the mandrel diameter.
Previous solution / Competitor product
- N/A
Solution
- The sensor that was installed at this application is the HMD OKA 2038.38 G with tube OL 19.
- The signal of the infrared sensors controls the movement of centering device and abutment. The point of view is restricted by the tube and prevents disturbances by steam in the cooling phase.
- An optimum adaptation to the operating conditions is given due to the adjustable response temperature. The HMD with self-learning response temperature (Auto-Teach function) is suited to continually changing conditions.
- The compact sensor with a stainless steel housing can withstand surrounding temperatures of up to 75° C. The use of a cooling jacket raises this up to 200° C.
- Alternatively sensors with fibre optic cables are available which permit an application at ambient temperatures up to 600° C without cooling.
Customer Benefits
- Maintenance-free
- High temperature stability
- Recognition of hot objects at big distances
- Self adjustment with Auto-Teach or step switch for the response temperature
Product Part number
- OKA 2038.38 G
Brand
- Proxitron
Accessories
- Piros swivel stand HM2
- Tube OL 19
- Pilot light unit (for alignment) DAK 308 + OL 26
- Different cable lengths (e.g. 15 m)
Customer Testimonial
compared to previous solution or competition
Manual rod to check the camber measurement
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