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Now, in rolling mills require high starting torque but the load may be sudden get off, in that case both DC series and DC shunt motor is not use. In rolling mills cumulative compound motor is used which has high starting torque and spe Continue Reading Robert Harvey, lived in Lincolnshire, UK
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For improved size reduction one of the rolls rotates faster. This results in a differential in speed between the roll pair. Typical differentials range from 1.2:1 to 2.0:1 (fast to slow). Typical roll speeds would be 1,300 feet per minute (~ 395 m/min) for a 9-inch (~23 cm) roll to 3,140 feet per minute (~957 m/min) for a 12-inch (~30.5 cm) roll.
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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-
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For more reliability, safety and efficiency. SMS group has banked 60 years of experience supplying all generations of oil film bearings to rolling mills in the steel and non-ferrous industry worldwide. Today, you can identify our modern and cost-effective roll neck bearings by the SMS group trademark. TEST TEST.
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Cycloconverters are the direct type converters used in high power applications for driving induction and synchronous motors. ... if the original slip of the running motor is s; Reverse-current braking is used in the electric drives of hoisting and conveying machines, rolling mills, and roller conveyors. Download Solution PDF.
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Turn wheel according to degrees. Turn the thickness adjusting wheel 90° and feed the metal through. Depending on the roller's gears, a 90° a might not do much, if that is the case turn it more per pass through the rollers. You will get to know the tendencies of …
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accordance with Figure 5 are used predominantly in fine-section and wire mills. They have machined brass or steel cages. In comparison with their suitability for high rolling speeds of up to 40 m/s, they have high load carrying capacity. In the finishing sections of such lines with rolling speeds of up to 100 m/s and higher, rolling is
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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.
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What we claim is 1. A safety device for rolling mills arranged to interrupt the transmission of motion from the motor to the rolling stands, in which the outlet guide for the rolled material of at least the last stand of the rolling mill is fixed to the housing of the respective stand by fixing means arranged to allow the guide to separate from the housing when said fixing means are …
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Capacity: 300,000 - 1,000,000 T/Year Learn more Re-bar Rolling Mills Capacity: 100,000 - 200,000 T/Year Learn more Mini-bar Rolling Mills Capacity: 300,000 - 1,000,000 T/Year Learn more Long Products Rolling Mills Capacity: 500,000 T/Year Learn more Wire Rod Rolling Mills Capacity: 300,000 T/Year Learn more Light Section Rolling Mills Capacity: 300,000 - …
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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
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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 ...
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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 ...
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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 ...
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Electrical Drives MCQ Test & Online Quiz: Below is the Electrical Drives MCQ Test that checks your basic knowledge of the Electrical Drives. This Electrical Drives MCQ Test contains 20 Multiple Choice Questions. You have to select the right answer to the question. Finally, You can also attempt Online Quiz from the Take Electrical Drives Quiz Button.
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Q 11. For which types of D.C. motor, dynamic braking is generally used? (A) Shunt motors (B) Series motors (C) Compound motors (D) All of the above. Answer: Option D . Q 12. D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this (A) Series motor (B) Shunt motor
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Motors for Metal Rolling Mills. AC adjustable speed motor drive systems are the preferred technology for new rolling mill installations and modernization projects. TMEIC designs and manufactures two types of AC solutions for this purpose. Salient pole synchronous motors that meet the high power and torque demands of a hot strip mill, as well as ...
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AC motor ARB 22 – 65. three-phase synchronous IP55. AC motor. ARB 22 – 65. Power: 0.4 kW - 290 kW. Rotational speed: 1,500, 1,000, 750, 600, 500 rpm. Motors for power operated roller tables are special drive elements for the rolling mill industry. Especially during operational or conveying cycles, these are subjected ...
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ZZJ-800 Series Hoisting Metallurgical DC Motor is a kind of DC motor used for metallurgy hoisting, available for steel rolling machine, crane, elevator and electric excavator etc The motors have lower moment of inertia GD, higher overload capacity, and quicker speed response so that it is possible to undergo frequent starting, braking ...
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Industrial Drives Questions and Answers. The below list provides all the multiple-choice questions related to the industrial drives technical subject. Answers are available at the bottom of the article. 1. The cost of an induction motor will increase as. …
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the common bearings used in the rolling mills are (i) sliding bearings in which the shells are of plastics/organic fabric and achieve friction coefficient from 0.02 to 0.1, (ii) bearings with rolling friction which are characterized by small wear and tear and hence high accuracy of the rolled material and in these bearings there is low friction …
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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
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rolling mills. They also drive many other types of industrial equipment such as fan drives, Banbury mixers and extruders. To meet the needs of a broad range of applications, our rugged DC motors are available in sizes ranging from 12-inch to 12-foot armature diameters, with available power ratings up to approximately 35,000 horsepower.
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