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Thermal imaging camera offers wide temperature range of 900 to 2400 °C, temperature measurement of molten metal. It reduces errors and there is minimal impact of emissivity. It offers data logging functionality and reduces cost.

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Workpiece Control in Drop Forging using IR pyrometers

Home Case Studies Pilger mill in tube rolling mills – hot and cold pipe detection

Pilger mill in tube rolling mills - hot and cold pipe detection

Monitoring of Surface Temperature using non contact infrared sensors

In die forging the semi-finished products need to reach a particular forging temperature before forming. To get the best possible production results the surface temperature of the material is monitored accordingly.

The same goes for the forging after forming or before storing

Process temperature:700 °C to 1,250

Thermal Camera or Infrared thermometers are used to accurately monitor the surface temperature to optimize work piece control

Products and Accessories

High Performance IR Thermometer

Short wavelength infrared camera

Case Study Number

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

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.