Focus on serving Metal, Mining and Crane Segment.
Focus on serving Metal, Mining and Crane Segment.
On high grade rolling, the exit coil temperature radiated heat leading malfunctioning of signal of existing light barrier. Water cooling line provision was not available. Reliable coils detection regardless of their temperature, cold or warm, up to 600°C.
Coil detection
Pilger mill in tube rolling mills - hot and cold pipe detection
Uninterrupted coil detection for maximum machine availability and uptime
- Detection irrespective of coil temperature
- Light barriers operate 290°C without any water cooling
- High temperature glass reflectors up to 500°C
- Robust stainless steel housing
Challenges
- On high grade rolling, the exit coil temperature radiated heat leading malfunctioning of signal of existing light barrier
- Water cooling line provision was not available
- Furthermore, existing light barrier gets easily disturbed by pollution or steam or alignment is disturbed with shocks
- Detection was made difficult by the coil temperature combined with the nearby outdoor area, which facilitates steam formation.
Solution
- Reliable coils detection regardless of their temperature, cold or warm, up to 600°C.
- Retroreflective model with separate electronics
Products and Accessories
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
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