Primetals Technologies has won an order from AMAG rolling , located in Ranshofen, Austria, to modernize the entire drive technology on its four-high hot rolling stand. The project includes the supply of the motors, converters and converter transformers, as well as couplings, disk brakes, mechanical adaptations and spare parts.
Thread Rolling Figure 13.16 (a) Features of a machined or rolled thread. (b) Grain flow in machined and rolled threads. Unlike machining, which cuts through the grains of the metal, the rolling of threads causes improved strength, because of cold working and favorable grain flow. Figure 13.15 Thread-rolling processes: (a) and (c) reciprocating
Cluster rolling mill or sendzimir rolling mill: Each of the working rolls is supported by two backing rolls. Here rigidity is well maintained. Cluster rolling mills are used for the high draft. Typical arrangement of rollers for rolling mill: Continuous rolling mill: Uses a series of rolling mill and each set is called a strand.
In a rolling mill all the inverter units need to be oversized to accommodate the 200% head end impact overloads, although only one drive is experiencing this impact at a time. The result in a large total capacitance …
B21B39/00 — Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills B21B39/02 — Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
The present invention relates to an electric control arrangement for the speed control of a rolling mill drive motor of a rolling mill for producing hollow blocks, such as is known in principle in rolling mill technology from DE-OS No. 23 26 115.
Roll bearings are to meet the basic need of the rolling mill which is the smooth rolling of the steel products. They are friction reducing devices which provide support to the rolls for effective rolling with minimum of energy loss. The bearings are designed to withstand high rolling loads, heavy shocks, varying speeds, and high temperatures.
performance data of rolling bearings for rolling mills are given in Catalogue GL1. A selection of publications covering rolling mill bearing arrangements and fundamental subjects in bearing arrangement engineering, such as dimensioning, mounting and dismounting, lubrication and maintenance is given in the list on page 52 of this publication ...
Rolling of Steel in a Modern Long Product Rolling Mill. Long product is a common name for (i) reinforcement steel bars, (ii) shaped steel bar products such as rounds, flats, squares, and hexagon etc., (iii) sectional products such as angles (equal and unequal), channels, beams, tees, and special profiles etc., and (iv) wire rods.
We are here in Aluminum Rolling Mill with problems of Rolling Mill Chatter. The arrangement of the drive train is like this. We have two old GE motors [type MCF-8, 4000HP, 300/750 rpm, 700V] driving the input shaft of the gear box. The output of the gear box is connected to the pinion gear box and from pinion the two spindles drives the top and bottom …
Rolling of steel in small and medium sized rolling mills is generally carried out in cross-country rolling mills. The rolling mill is called cross-country rolling mill because of arrangement of the roll stands. In these rolling mills, the centre lines of the roll stands are parallel to each other and the material being rolled is shifted ...
A driving arrangement for rolling stands of a rolling mill, is described. The driving arrangement includes a control system which prescribes desired values for the rolling stands via control units, the rolling stands having at least one electric motor which is supplied with electric energy by a power supply system via at least one converter having turn-off power …
Cluster mill is generally used in cold-rolling operation. The arrangement of cluster mill is shown in Fig. 2.9 (d). Type # 5. Multi-High Rolling Mill: The multi-high rolling mill consists of two small diameter working rolls, a row of intermediate driving rolls, and a raw of backup rolls.
Therefore, they are driven by friction through an intermediate row of driving rolls that are, in-turn, supported by a raw of backup rolls. The arrangement of multi-high rolling mill is shown in Fig. (e). Type 6. Universal Rolling Mill: The universal rolling mill …
Roll pass design is a set of methods for determining the dimensions, shape, number, and type of arrangement of rolling mill passes. Roll pass design also includes the calculation of pressing forces and their distribution on the roll passes. Several passes are made for each section; a square or round billet or bloom acquires a specified form on ...
Rolling Mills Metal Rolling Mill Machine Rolling Mill. Two-High: Generally, a 2-HI mill is used for hot or cold breakdown and finishing of bar, sheet or strip. A wide range of sizes with separating force capacities from 10,000 lbs. (4.53 MT) to over 3,000,000 lbs. (1360 MT) are available.
CA2615023A1 Drive arrangement for rolling mill . In the case of a drive arrangement for a rolling mill, comprising at least one drive motor (M), a main gear mechanism (HG), a pinion gear mechanism (KWG), a rolling stand (G) with working rolls (AW), and the spindles, couplings and the like which connect these components, the main gear mechanism (HG) is a single-stage …
(ABB: Zurich, Switzerland) -- Global technology company ABB is providing a package of metals industry-specific digital-ready solutions, including drives, controller, and converter infrastructure, to enable Global Steel Wire (GSW), part of CELSA Group, to modernize operations at its Santander steel mill.
Fig.2: Stand-alone configuration of four stand cold rolling mill. Fig.3: Typical arrangement of mill stand. The paper is organized as follows: in Section 2, a mathematical model has been driven for single-stand cold rolling mill. In Section 3, SIMULATION of Cold Rolling System based on MATLAB Simulink have been presented.
Analysis Of Existing Rolling Mill With Prototype Soft Starting Arrangement Of Rolling Mill For Energy Conservation – An Experimental Approach A.M. Bisen, Dr. P.M. Bapat and Dr. S.K. Ganguly Abstract In this paper an analysis is done on the main drive of rolling mill which consumes about 60 to 70 % of total energy of the plant.
Medium Voltage Drives. 89/115. Danieli Automation MV Drives are the perfect choice as AC/DC converters & multi-drive DC link inverters arrangement. The system is designed aiming to reliable operations, with simplified maintenance due to the wheeled power modules for easy servicing, with state of the art control structure and user-friendly ...
White Paper | Roll Drive Design Considerations for Steel Mill Rolling Operations 3 Introduction The conveying system that links one process to another is the lifeblood of any rolling mill. Lose this ability to move product and you lose production. As anyone in the steel industry knows, if a single component can shut down
A Tandem rolling mill is a Rolling mill with 2 or more close-coupled Stands, each of which is setup for rolling by using its Spring Curve and the Compressive Curve of the metal so that both the Rolling Force and the exit thickness of each Stand are determined.. The main advantages of a Tandem Mill are: only one single pass is required which saves time and increases …
ME 4563 Dr. S. Haran 47 Rolling Mills Several types of Rolling mills & equipment are built, using diverse rolls arrangement Equipment for Hot and Cold rolling is essentially the same, except the process parameters, roll materials, lubricants and cooling system Very capital intensive Highly automated Rolling Mills ME 4563 Dr. S. Haran 48
2 Principles and Applications of Metal Rolling (ii) Shape of the rolled product- flat, sections or hollow sections rolling. (iii) Direction of rolling- lengthwise, transverse, and skew rolling. (iv) Mode of rolling mill operation- continuous (unidirectional), and reverse rolling, where direction of rotation of rolls are reversed. When two rolls of equal diameter and with axis lying in same ...
2. A rolling mill comprising: 3. In a rolling mill according to claim 2 wherein said movable member is carried by one of said drive side bearing chocks movable towards and away from said other drive side bearing chocks and arranged to engage said other drive side bearing chock, and 4.
The disclosure of this invention relates to a rolling mill wherein the chocks of the work roll on the drive side of the mill are split to enable the work rolls to be removed and replaced while strip is still being passed between the rolls. The chocks of the work rolls on the operating side are nested. The work roll chocks are provided with wheels which, during the roll changing operation, are ...
The rolling line will include a six-stand roughing mill in an H-V arrangement including the upstream equipment for loading and unloading the billet heating furnaces and also a six-stand intermediate and eight-stand finishing mill, both in an H-V-C arrangement.
A Sinamics SM150 converter drives the two 3.3 kV rolling motors, each of which has a power of 3,300 kW and a speed ranging from 240 to 600 rpm. Sinamics S120 converters drive the 690 V coiler motors, each of which has a power of 950 kW and a speed ranging from 330 to 1,200 rpm, as well as the driver motors and trimming shear.
Prof. Ramesh Singh, Notes by Dr. Singh/ Dr. Colton 13 Flat Rolling Analysis • Consider rolling of a flat plate in a 2-high rolling mill Width of plate w is large Æplane strain h b h f R V 0 V f (> V 0) θ