Industry: Steel and rolling mills
Hoist /Drum: Improved operating reliability and positioning accuracy at the ladle crane
Fundamentally improve the operating reliability and positioning accuracy of the ladle crane hoist used in steel production. Installation of the modular universal encoder system U-ONE, which offers the following special characteristics • Basic unit mounted directly at the hoist drum by using a double joint coupling on a tailor-made base plate construction • Signal transmission …
Hoist /Drum: Improved operating reliability and positioning accuracy at the ladle craneRead More
Slab Detection in Excessive Steam (HMD)
On the roughing mill exit, there is a lot of steam due to the spray header. The steam obstructs field of view of the traditional scanning type HMDs as result, occasionally the signal flickers for a millisecond. The next generation HMD 4.0 from Proxitron have intelligent software features which allows to set dual thresholds (hysteresis). …
Precise Looper Position Feedback
Loopers are normally used to control the tension of the metal strip between roll stands. The rotational angle of the looper is measured by a feedback encoder that is exposed to special demands. For this application Johannes Hübner Giessen developed a special looper encoder, which boasts a considerably longer lifetime thanks to especially designed-in features. …
Strip detection after laminar cooling
Due to low temperature of the strip at the laminar table, the response from a standard scanning type HMD was unstable. Proxitron light barrier was installed at the down coiler. It provided higher functional reserve up to 750 m Home Case Studies Strip detection after laminar cooling Strip detection after laminar cooling Home Case …
Converter/ Inclined hoist: Robust encoders ensure more precision and less downtimes
Home Case Studies Robust encoders ensure more precision and less downtimes The skip-car control mechanism utilised to date included two mechanical, geared cam limit switches that are time consuming to program. Upgrading to meet modern demands required suitable components for measuring actual values that are not only characterized by their high accuracy and functional reliability, …
Converter/ Inclined hoist: Robust encoders ensure more precision and less downtimesRead More
Blast furnace/Skip hoists: Retrofitting a U-ONE provides higher accuracy and improves availability
Home Case Studies Retrofitting Availability The blast furnace skip hoist is protected against overspeed on the motor side by a mechanical overspeed switch with integrated speed increasing gear. The universal encoder system U-ONE® is to replace the outdated sensor systems on both the motor and drum sides. Thanks to its modular design it is possible to adapt the …
Coil detection
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. Home Case Studies Coil detection Coil detection Home Case Studies Pilger mill in tube rolling …
Alignment for Cut to Length: Positioning lasers
Operator from ECR has to verify that plates is in center for shear to work properly. Needed a good visible laser line on dark plates. Laser length up to 20mtrs. Z-laser designed the next generation green laser with high output power. Visible on dark surfaces with limited impact from ambient light conditions Home Case Studies …
Temperature Measurement at Roughing Mill entry and under the strip
Hot rolling mill processes needed accurate temperature measurement, as well as efficiency in extremely high temperature. Rugged pyrometer was installed at the measuring site, with electrically isolated sensing head and fiber optic. Home Case Studies Temperature Measurement pyrometers Temperature Measurement at roughing mill entry and under the strip Home Case Studies Pilger mill …
Temperature Measurement at Roughing Mill entry and under the stripRead More
Hot and Cold Rolling Mills / Main drives: Modernization of existing encoder installations
For precise speed control in rolling mills the main drives of the roll stands and the coilers need to be equipped with an encoder. In addition, it is often necessary to provide increased protection for personnel during special operating modes, such as: For this application Johannes Hübner Giessen has been working with Motor OEMs for …
Hot and Cold Rolling Mills / Main drives: Modernization of existing encoder installationsRead More