A rolling mill in which a pair of upper and lower intermediate rolls which are shiftable in the axial direction according to the width of a material to be rolled are interposed between a pair of upper and lower work rolls and a pair of upper and lower backup rolls, and the flatness of the rolled material is controlled by the combined effects of the adjustably axially shifted intermediate rolls ...

Answer: (d) Speed control. SHOW ANSWER. 10. The starting torque in case of centrifugal pumps is generally. (a) less than running torque. (b) same as running torque. (c) slightly more than running torque. (d) double the running torque. Answer: (a) less than running torque.

Answer (1 of 2): I have commissioned over a hundred rolling mills and never seen anything except an AC induction motor. This question reads like something from a …

These mills are used for rolling tubes, axles, and spheres. The number and arrangement of the roll stands of a rolling mill are determined by the function of the mill, the number of times the metal must pass between the rolls to produce a given section, and the assigned output. Eight types of rolling mills are distinguished on this basis.

Variable speed drives for rolling mills Rolling mills demand high precision and high overload capability. The mill is subjected to rapid change in load speeds, forcing equally quick generating and braking actions. This demands a constant torque in a wide speed range and large torque steps. ABB medium voltage drives are the perfect answer for the

the manufacturing process. As a result, TMEIC AC motors for rolling mill applications have established a worldwide reputation for high reliability, robust construction and excellence of operational performance. Large AC Adjustable Speed Motors for Metals Rolling Mills.indd 3 10/24/2011 4:20:46 PM

This is a complete, USED ITALIAN rebar mill, starting from billet 130mm by 6m lenght, composed of 22 stands in continuous, 3 flying shears, loopers, […] Posted on 25/03/2021 12/10/2021 !COMPLETE ROLLING MILLS, cold rolling equipments

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 ...

DC. MOTORS. DC Motors of World Class Quality is found at New India Electricals Ltd (NIEL), you can avail which serves sugar, steel & rolling mills industry with Laminated Yoke & Solid Yoke in frames up to 710. These motors are designed for various application having constant and variable speed requirements. General applications of the motors ...

particular application. End mills are fluted, much like drills, and the number of flutes determines what the end mill can do. Two fluted end mills are used for machining aluminum, and are favored for plunge cuts. Four fluted end mills are used in machining the harder metals like steel. Generally, it is not a good idea to use a four fluted end mill

Rolling Mill and its Technological Equipments – IspatGuru

A.G. Powell Equipment, Inc. Specializes in the buying and selling of used steel mill equipment on an international basis. The company's primary areas of business are in used rolling mills for both flat and long products, arc melting furnaces, casters, and various pieces of support, finishing, processing and electrical equipment found in a steel mill.

(c) Rolling mills (d) All of the above Ans: d. 40. Flame proof motors are used in (a) paper mills (b) steel mills (c) moist atmospheres (d) explosive atmospheres Ans: d. 41. Which of the following machines has heavy fluctuation of load ? (a) Printing machine (b) Punching machine (c) Planer (d) Lathe Ans: b. 42.

G. Engberg, L. Karlsson, in Fundamentals of Metallurgy, 2005 11.5.1 Hot rolling. Mill data from the hot strip mill has been used to calculate the mean flow stress in each pass, assuming the material to be elastic – ideally plastic. The roll force model used was a classical slab method with constant friction assumed in the roll gap. For the roughing mill (reversible 4-high) both roll …

Sterling Machinery is a US based company the specialized in buying and selling used machinery such as used shears, press brakes, lathes, grinders, mills, and more. JavaScript seems to be disabled in your browser.

expertise and process knowledge for rolling mills The demands of the rolling mill environment are met by ... leading manufacturer of AC and DC drives for all types of demanding applications. For low voltage co-ordinated ... an inverter is used to brake a motor, the energy from the (regenerative) braking operation is sent back to the DC ...

Here transition system and a motor are needed which is less powerful. 3. Four High Rolling Mills: In this type of mill, there are four parallel rolls one by another. In this operation, the rotation of the first and the fourth rolls take place in the opposite direction of the second and the third rolls. The second and third rolls are smaller to ...

Roughing Rolling Mill Complex with six Housing Less / Pre-Stress shiftable type continuous stands (Horizontal and Vertical) of 560 mm depending on the Rolling mill capacity. Intermediate Rolling Mill Complex with six Housing Less / Pre-Stress …

Rolling mill DC motors are best at low speed, high torque applications, while AC motors typically need to run above 800rpm to be cost effective. Also the case for higher efficiency of AC motors is many times …

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.

Cold rolling is a process that occurs after hot rolling in order to reduce the thickness, increase the yield and tensile strength and pliability of metal. It is a relatively expensive and labour-intensive process, but the improved mechanical properties increase the value of the finished product, whether that is a sheet, strip, or coil.

In a metal rolling process, rolls, stands, bearings, housing, motors, and other mechanical equipment are all a necessary part of the manufacturing operation. The place where all the equipment for metal rolling manufacture is set up is called a rolling mill. Rolling mills often vary in the type, number, and position of rolls.

AC Motor Driven Pinch Roll pushes material in particular direction and do not cause any type of physical change in material that is moved over a distance DC / CANTILEVER TYPE PINCH ROLLS DC Pinch Rolls are installed at different places in a working rolling mill, including the place between roughing mill and intermediate mill as well as before ...

23. Rolling Mills: Rolling of steel, the process during which the cross section of the metal gets reduced, while increasing its length proportionately, is the major function of steel mills. Rolling mills are usually classified according to the material produced by them. The principal types of mills, classified according to their products rolled ...

In temper rolling mills there are three common methods/actuators for flatness control, work roll crown, work roll bending and tilting of the roll gap. The most common method is the use of a constant work roll crown, which means that the work roll barrel has "a diameter profile", a difference in diameter along the barrel length.

tems for all types of mill control Morgan Construction, construction engineering services, mill audits, and field service programs for rolling mill plants Siemens Energy & Automation, drives and automation systems for hot and cold rolling mills, profile rolling mills, plantwide automation, computer modeling, mon-

Segmentation pinch roll used in rolling mill line The pinch roller device is arranged at the fold-out flying shear machine outlet. The device can be adapted to tilt the layout of the upper cooling ...

We are offering Steel Rolling Mill Duty Motor to our clients. Re-rolling mill duty motors are used to drive the re-rolling mill where hot steel billets are rolled in to RODS, FLAT BARS, RAILS, CHANNELS, ANGLES and SHEETS etc.The …

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.

bearingsare used for rollneck support. Which type willbe used in specificcasesdependson the rolling stand design. To accommodate the maximum number ofrollers, especiallyin larger bearings, and hence provide an optimum load carrying capacity, the bearingsare equipped with through-bored rollersand fitted with pin-type cages(fig. 3). Such a

Blooming Mill. a high-capacity rolling mill for the reduction, into blooms, of steel ingots of large cross section, with masses up to 12 tons and larger. In some cases a blooming mill is used for the rolling of slabs and also shaped pieces (for heavy I beams, channel iron, and the like). In metallurgical plants the blooming mill is an ...

Favorable softening of the rolling conditions from the point of view of the detected amperages in the electric motors of the rolling mill has been established. ... motors, reversing rolling mills ...

Due to heavy fly wheel giving momentum to the rolls, this rolling mill is also widely used for rolling of low purity hard silver and similar hard metal. This rolling mill is powered by a 5.0 HP 440 volts / 380 volts 3 phase AC electric motor fitted with suitable ON/OFF push button starter and a Reverse / Forward switch

Shearing Process and Shears. Shearing is a simple process used for the cutting of metals. It is basically a metal fabrication process and is being used in rolling mills at several places for hot as well as for cold cutting of the steel material. Shears can be used to cut steel and other materials of any size or shape.

Murska Machines for Grain Crimping. Murska 220 SM. The Murska 220 SM is the product of long-term development to provide farmers with a versatile, simple-to-operate roller mill for grain processing. The spring-loaded, gear-driven rollers, with a 2mm fluted and hardened surface, will process cereals or pulses at up to 1.5t/hr. Available with ...