2: Three high rolling mill: It consists of a roll stand with three parallel rolls one above the other. Adjacent rolls rotates in opposite direction. So that the material may be passed between the top and the middle roll in one direction and the bottom and middle rolls in opposite one. In three high rolling mills the work piece is rolled on both ...

The vibration demolding of the crystallizer leads to slab thickness deviation in continuous casting processes. Therefore, in this paper, the dynamic model of the hot strip rolling mill vibration resulting from entry thickness deviation is proposed and its dynamic characteristics are studied. First, the dynamic model of vertical vibration in the hot strip rolling …

Circuit for controlling flatness in cold-rolling mills having a roll stand with at least six rolls including intermediate and working rolls capable of being deflected, comprising means for measuring tensile stress distribution over the width of a strip to be rolled having central and edge regions, means connected to said measuring means for ...

A multistage rolling mill having a roll arrangement of the Sendzimir type with each of the upper and lower half roll grouping having two drive rolls employs a separate upper inner housing carrying the upper roll half and a separate lower inner housing carrying the lower roll half, with each of the inner housings being encompassed and mounted within a separate integral and …

Based on the direction of feed available, two high rolling mills are further divided into types :-a) Non -Reversilng two high rolling mill In this type of rolling mill, the rolls can rotate in one direction only and hence the workpiece can be feeeded from one direction only.b) Reversilng two high rolling mill In this type of rolling mills, the rolls can rotate in both …

Applications of Industrial Drives > ROLLING MILL DRIVES: The following types of drives are used for rolling mills: (i) DC motors,. (ii) AC slip ring motors with speed control. Schematic diagram of reversing cold rolling mill using a PLC for its inter-locking and. The DC motors, because, of their inherent characteristics, are best ...

FIG. 1 is a schematic diagram to illustrate the piercing-rolling of a starting material by a conventional piercing machine. As shown in the drawing, the piercing machine includes a pair of conical rolls 4 each of which is inclined with respect to a pass line PL, a bullet-shaped plug 100 as a piercing tool, and a mandrel 3 that is coupled with ...

Figure 1: Schematic diagram of a two-mill stand configuration. trol concept for the HGC (hydraulic gap control) in rolling mills can be found in [11], [18]. Maybe, these restrictions and features of the plant give a possible explanation of the …

Rolling Mill - Electrical & Automation Engineer. يونيو 2010 - ‏أغسطس 20144 من الأعوام 3 شهور. 1) Provide direct assistance and troubleshooting for hardware and software problems on all plant instruments and electrical equipment. 2) Maintaining and calibrating all instruments.

In the drawing, a rolling material 1 (e.g., steel) is rolled by an i-th stand rolling mill 2, an (i+1)th stand rolling mill 3, and so on in sequence. The total number (n) of the stands of the tandem rolling mill is usually from five to seven (n=5 to 7). A looper control system is interposed between two stands, respectively.

Rolling Mill Configurations • Smaller diameter rolls produce less length of contact for a given reduction and require less force to produce a given ... Figure 16-13 Schematic diagram of an impactor in the striking and returning modes. (Courtesy of Chambersburg Engineering Company, ...

An interstand tension regulator for tandem rolling mills wherein the gain coefficient of the regulator is varied to maintain a fast constant tension loop response regardless of mill speed, the cross-sectional area of the product being rolled, and its modulus of elasticity.

Most primary rolling is done in either a two high reversing mill or a three-high continuous rolling mill. Final products from hot rolling include plates, strips and a wide variety of bars and sections. Plates and strips are normally rolled between two plain cylindrical rolls, or on four-high mills. a. Two-High Reversing Mill:

Figure 3 shows a schematic diagram of the relationship between strip shape and relative difference in elongation. When a rolled material is cut in a ... mills and foil rolling mills for aluminum, copper and other materials. 2.2.2 Basic data of …

FIG. 1 is a schematic diagram of a tandem rolling mill operation incorporating the automatic gauge control system of the present invention in block form; FIG. 2 is a Bode plot of rolling speed versus gain, showing the manner in which the gain increases as a function of speed in accordance with the system of the invention;

FIG. 1 is a diagrammatic side elevation of a mill stand for rolling a workpiece; FIG. 2 is a schematic piping diagram for the application of lubricant to the rolls according to the invention; FIG. 3 is a graph showing the relation between lubricant …

Figure 5.1 - CORUS Multi-mill layout 60 Figure 5.2 - Initial sample microstructure after being annodized using Barker's reagent and viewed under polarised light at 20x magnification, a) Surface b) Centre 61 Figure 5.3 - Schematic diagram of the rolling samples. All dimensions are in millimetres, drawing not to scale: a) Top view b) Side view 63

and rolling mills. A specialty steel plant might have only electric furnaces with some sec-ondary steel-refining equipment such as vacuum degassing units, electroslag remelt-ing equipment, argon-oxygen decarburization (AOD) units, in addition to special forming and rolling facilities. Most of the various op-erations can be performed on a widely ...

The rolling process is shown in Fig. 2.1: Rolling is done both hot and cold. It is accomplishes in rolling mills. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. Rollers may be plain or grooved depends upon the shape of rolled product.

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.

Schematic diagram and PDA of interstand tension establishing process: (a) schematic of interstand tension establishing process; (b) tension establishing process by entry stand. After the above preparing process, the mills start rolling.

FIG. 1 is a schematic block diagram of the electrical circuitry for controlling a rolling mill in accordance with the teachings of the invention; FIG. 2 is a functional block diagram of the rolling mill control system of FIG. 1;

Powerful gears in rolling mills. March 1, 2000. After many years of service, the gears in a hot-strip rolling mill must be replaced. But, the new gears face a dual challenge. Raymond J. Drago and ...

A schematic diagram of a hot strip mill (Hwu, 1995) ... Roughing mill rolling of reheated slab: The roughing mill usually consists of one or two roughing stands in which the slab is hot rolled back and forth 5 or 7 times repeatedly to reach the minimum thickness requirement. The roughing mill also contains edger rolls that are used to roll the ...

Classification of the rolling mills .....91 3.2. Equipment of the rolling shops.....97 4. SECTION AND SHEET MANUFACTURING ... The diagram – at tensile test The proportional connection between stresses and defor-mation according to Hook's law = (where Е is the modulus ...

About Steel re-rolling mill Steel Re-rolling is a major steel section and bar producing technology used in India and aboard. Since its inception in India with setting up of first Re-rolling Mill in kanpur in 1928,this technology has contributed significant steel making capacity in secondary steel sector in India.

Rolling Mills Figure 13.11 Schematic illustration of various roll arrangements: (a) two-high; (b) three- high; (c) four-high; (d) cluster (Sendzimir) mill. Tandem Rolling. Tandem Rolling h 0 V 0 w 0 h 1 V 1 w 1 h 2 V 2 w 2 h 3 V 3 w 3 h f V f w f h 0 h 1 h 1 h 2 h 2 h 3 h 3 h f h 0 h 1 h 2 h 3 f V 0 V 1 2 3 V f Stage 1 Stage 2 Stage 3 Stage 4

SCHEMATIC DIAGRAM OF 6 HIGH ROLLING MILLS Hydraulic jack Back Up roll Back up rolls Intermediate Pinch rolls Pinch Rolls rolls Pinch rolls Shear Shear Work rolls Uncoiler Uncoiler Recoiler Bottom foundation 2 4. …