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1. Multi-High Mills (KT/KST Mill)

12-High Mill (KT Mill)

Product Summary

12-High Mill (KT Mill)

Roll Arrangement of KT Mill

KT Mill (Kobe Twelve-high Mill) is a high-performance rolling mill having the respective features of our 4-high and 20-high mills, which have excellent strip flatness functions, and corresponds to the demand of improved strip flatness.

Thus, the roll arrangement of KT Mill (12-high) dominates flatness control. In addition to that, KT Mill is equipped with a wedge-type hydraulic roll-gap control system, AFC (Automatic Flatness Control System) and KOS (Kobelco Operation Support system) which are developed by Kobe Steel. These features provide optimal rolling for the application of ultra-thin stainless steel foil, Fe-Ni alloy, titanium, copper, and so on.

Typical Specifications

The following are the typical specifications. Please consult us for further information.

(unit:mm)

Type KT160 KT230 KT300 KT350
WR Diameter 30 - 60 40 - 80 50 - 100 60 - 120
Max. Strip width 650 850 1,050 1,300

Structure and Illustration

KT Mill Thickness & Flatness Control Actuator

KT Mill Thickness & Flatness Control Actuator

The Japan Society for Technology of Plasticity

The 2010 Developed Technologies Award "Development of KT Mill for stainless steel foil"
* Publication "JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY" June 2010

20-High Mill (KST Mill)

Product Summary

20-High Mill (KST Mill)

Roll Arrangement of KST Mill

KST Mill (Kobe Super Twenty-high rolling mill) is a suitable rolling mill for conforming various customers' demands. It is also equipped with a wedge-type hydraulic roll-gap control system, AFC (Automatic Flatness Control System) and Kobelco Operation Support system (KOS), which are developed by Kobe Steel.

KST Mill ensures a centralized programmable control of the whole mill line as well as the most reliable automatic gauge control.

KST Mill provides the optimal rolling for the application of stainless steel, Fe-Ni alloy, titanium, copper, and so on.

Typical Specifications

The following are typical specifications. Please consult us for further information.

(unit:mm)

TYPE KST155 KST220 KST260 KST300
WR Diameter 30 - 60 40 - 80 50 - 100 60 - 120
Max. Strip width 650 850 1,050 1,300

Structure and Illustration

KST Mill Thickness & Flatness Control Actuator

KST Mill Thickness & Flatness Control Actuator

Structure and Features of Multi-High Mills

1. Use of different diameters of work rolls

Rolling mill sizes are classified into regular series by roll diameters. Work rolls of different diameters can be used.
EX):KT160 adapts work roll diameters by 30 to 60mm.

Pass-line level is changed by using the different size of work roll, but to be kept horizontal by auto pass-line adjustment device equipped to mill guide device.

2. Separated Housing Structure

Our multi high rolling mill has unique housing structure, which is separated into upper and lower parts and connected by four columns.

As a result:

  1. It is easy to watch over the front and back of the strip during rolling and to feed the strip.
  2. The rolling load is affected by the 4 columns. With a differential sensor attached to each column, accurate rolling load detection can be carried out.
  3. Accurate load detection can work effectively for our own developed hydraulic Automatic Gage Control (AGC).
  4. Tilting-rolling by individual screw-down at the drive side and work side is possible, and is preventing strip telescoping and modifying asymmetrical flatness.

Separated Housing Structure

3. High gauge thickness control by Wedge-Type Hydraulic Roll-gap Control Mechanism

Roll-gap Control is performed by the hydraulic cylinder connected to a wedge built in the rear side of the back-up rolls of the lower housing. Mill housing receives rolling load directly through the wedge, so that a high-rigidity hydraulic push-up is possible. Moreover, the wedge-type hydraulic roll-gap control device achieved the world top-level high-speed control and adapts quick displacement control of strip thickness.

Wedge-Type hydraulic roll-gap control device

4. Uniform Product Shape with Various Flatness Control Mechanisms

Our 12- or 20-high rolling mill is equipped with such adjusting mechanisms as crown, intermediate roll lateral, and tilting-rolling for flatness control measurement. In addition, feed back control is possible with the Automatic Flatness Control System (AFC).

Crown control device,Lateral adjusting device

Contact

Heavy Machinery Department
Marketing & Sales Section
Machinery Business

Kobe Steel, Ltd.

TEL:+81-3-5739-6642
FAX:+81-3-5739-6976

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