P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement – 94 – load between passes, and for accurate positioning during rolling two hydraulic cylinders are installed. The position of the cylinders is controlled by servo valves

[Show full abstract] finishing stand of Dongkuk Steel's two-stand rolling mill was equipped with a more powerful hydraulic roll-gap adjusting system, and the entire rolling line received a new ...

Rolling mill operators meet these requirements in a continu-ous rolling process. They are looking for wear-free and low- maintenance solutions that feature highest availability. The technology must permanently withstand the harsh ambient conditions in rolling mills with vapor, dust and high temper-atures.

Rolling Mill Stand Geometry Restore performance and improve competitiveness of your mill Correct mill stand geometry is essential for effective and accurate gauge control, strip/plate quality and maintenance of the mill and its associated parts, like bearings, chocks, hydraulic clamps, bending and balancing systems as well as gauge control systems.

Melissa Muir, Jewelry Artist and Teacher, discusses and shows the difference between textures made with a hydraulic press vs. those made with a rolling mill.

John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III – Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill. The coil box reduced the distance between the roughing mill ...

Hydraulic Nuts or bolt tensioners are devices that are essentially used in steel and rolling mills to hold the blocks of the rolling mill together. They serve the same application as regular or conventional nuts but provide superior holdover. The design also allows the hydraulic nut to absorb shocks and tensile forces generated by the rolling ...

In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control. The …

The utility model relates to an upper backup roll hydraulic balance device of a cold-rolling mill and is concretely used on a strip cold-rolling device. A balance seat is fixed on a framework, an upper backup roll balance cylinder is connected with the balance seat through a bolt, a piston rod is connected with a joint, the middle part of a crosspiece is connected with the joint through a …

In the rolling work, on the one hand, we must pay attention to controlling the running status of the rolling mill machine, and on the other hand, we must ensure that the hydraulic piping system is operating normally.Therefore, in order to meet the production requirements, the rolling mill piping subsystem mainly includes auxiliary hydraulic pressure, servo-hydraulic pressure, thin oil ...

often results in instability in the rolling process, hindering high-precision and intelligent development. The hydraulic automatic gauge control (HAGC) system is a core mechanism for thickness control of plates used in the rolling process. Its function is to automatically adjust the roll gap of a rolling mill

Considering the two kinds of nonlinear constraints of rolling mill hydraulic cylinder, spring force and friction force, the vibration model of rolling mill system is established. The amplitude frequency response equations are obtained by using the average method. Comparing the time history curves of vertical vibration displacement of rolling mill system …

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The hydraulic cylinder is generally equipped with electrohydraulic servo valve and the corresponding transducers for the measuring position, pressure, etc., so as to achieve closed-loop control. Accurate and precise position control and pressure control can be realized by the hydraulic cylinder in the modern rolling mill.

That is a rolling mill. You're going to love the press/rolling mill combo if you haven't worked with one before. I love mine. It draws billets out way faster than my 24 ton hydraulic press. I set the weld on the press, make passes on the press until it's about 1/2" thick, then draw on the mill. Works really fast. Beautiful machine work. --Dave

Fig 2 Typical 4-high stands showing various details. Pre-stressed mill stand – In a conventional rolling mill, the roller separating force which arises when the work piece bar is passed through the rolls is transferred through the backup rolls and their bearings to the mill house. In a pre-stressed mill stand, the two backup rolls are connected to each other by an …

a hydraulic load capsule for a metal working rolling mill Other References: Stanley et al, Hydraulic conversion and modernization of hot strip mill at Gulf States Steel, Mar. 1999 Iron and Steel Engineer, pp. 48-52.

Get this from a library! Hydraulic control of rolling mills and forging plant: proceedings of a meeting organized by the Iron and Steel Institute and the West of Scotland Iron and Steel Institute, held at the University of Strathclyde on 19-20 May 1971.. [Iron and Steel Institute.; West of Scotland Iron and Steel Institute.;]

Nov 2, 2017. #4. Salem and I are in the process of build a set of rolling mills. The minimum is 1/2hp at 20rpm. Make sure your gear box is designed to put out the required torque. The mathe says you need 1,575 in/lb of torque at 20rpm with 2" rollers minimum. Reactions:

Roll bend can also be provided in a 6-high mill. These mills can be pinion stand or dual motor driven. Six-high rolling mills are equipped with hydraulic screwdowns, automatic shape control, and automatic gauge control.

According to the composition of Hydraulic AGC system of mill and the research of rolling force, its simulation model was founded based on the DOS environment with C programming language.

The rolling mill with hydraulic system is widely used in the production of strip steel. For the problem of vertical vibration of the rolling mill, the effects of different equivalent damping coefficient, leakage coefficient, and proportional coefficient of the controller on the hydraulic screw down system of the rolling mill are studied, respectively. First, a vertical …

Honeywell's Automatic Gauge Control (AGC) and Hydraulic Gap Control (HGC), incorporated with the MetalsMaster gauging system, enable mills to deliver the right gauge thickness with the least product variation. It also offers Target Adaptive control to increase yield, improve product quality and reduce scrap.

In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are

Hydraulic Screwdowns Practically all new rolling mills today are equipped with hydraulic screwdowns for hot or cold rolling. A disadvantage of mechanical screwdowns is the fact that you cannot adjust accurately while the screwdowns are under pressure. When you want to move upward with a roll gap, you always have some mechanical backlash.

Mill stiffness is an important parameter for strip rolling mill, but it is difficult to online detect. When the wide of strip are changed, or the rollers are changed, the mill stiffness will change slightly. This change can affect the thickness precision and flatness precision significantly. Making full use of the massive process data, the mill stiffness...

A ring rolling mill according to claim 1, characterised by the fact that the said actuating means for making the containment arm (10) turn comprises a double-acting hydraulic actuator (18) for control of the turning of the arm itself, and a servo valve (34) for commutation, regulation and locking of the movement of the actuator (18).

There are two hydraulic systems on the rolling mill, one for adjusting the position of the north side and one for the south side of the roll pack. These two independent systems can be treated separately. The design of the systems is …

5. Cluster Rolling Mills: In this type of rolling mill, there are two basic roles that are backed up by two or more rolls which are bigger than those two basic rolls. These backed up rolls give more pressure to the basic rolls to heavily press the strip.

In this paper, we propose an effective mechanical-electrical-hydraulic-interfacial coupling vibration model for hot rolling mills and obtain a practical measure to relieve mill vibration. First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried out during manufacturing. Rolling mill vibration is observed to gradually be enhanced …