Focus on serving Metal, Mining and Crane Segment.
Focus on serving Metal, Mining and Crane Segment.
Compact Hot metal detector is a cost-effective and accurate solution for detection of object position in the hot forging process. It is durable, flexible and detects position reliably. Prevents damage of the die associated with the sensor, efficient in very high ambient temperature. |
Object position detection at the different stages of hot forging process
Pilger mill in tube rolling mills - hot and cold pipe detection
- HOT METAL DETECTORS provide accurate position detection at various stages of the hot forging process
Challenges
In the hot forging process the steel temperature is around 900 °C. According to the press layout, more than one piece is worked simultaneously next to each other; a sensor with restricted angle of view is required to monitor the relevant area. Mounting is possible only directly on the border of the press, looking down into the respective working area, where temperature and graphite are very aggressive
Solution
Hot Metal Detector in compact design. HMDs with fixed switching temperature are preferred as cost-effective and adequate solution. A short protection tube is placed on the optic, with aperture 4 mm, to reduce the field of view and prevent the smallest possible inlet of contamination.
Products and Accessories
Reliable, long service life and flexible use on different machines.
One model for different tasks. Since it reacts to the temperature of the material to be forged, the hot metal detector also monitors its minimum temperature: this is a very important function, as it prevents a possible damage of the die due to too low temperature.
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
Case Studies
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