roll control ng mill

The Work Roll Bending Control System of the Hot Plate ...

2015-1-1 · A majority of modern rolling mills to eliminate the roll bending value during the operation, are equipped with a work roll bending system (WRBS) [4]. WRBS has a hydraulic cylinders at the roll edges, which create a compensation force. The value of this force must convert the bending curve into constant roll-gap.

Belt Wrappers | Coilers | Machine Concepts

Common Features. Heavy duty welded steel construction throughout. Configurations for overwinding or underwinding. Automatic Hydraulic or pneumatic belt tensioning. Many rubber and/or steel belting options. Custom designs to …

Board and paper machines | Valmet

Valmet is the world-leading full-scope supplier for paper machines - regardless of your raw material or desired end product grade. We have the experience and know-how to supply the machinery and optimize the whole papermaking …

Section Rolling Mill | Steel Plantech

Section Rolling Mill. Rolling mills are facilities that carry out a series of processes including rolling the billets, blooms, slab and beam blanks – extracted from the reheating furnace – into the prescribed size and correcting any bending, cutting …

Reeling

There is usually clear potential for improving production efficiency and line capacity in the finishing area. By letting Valmet help you in selecting the right reel for your grade, machine speed and web width, you can make full use of this potential. Valmet provides paper and boardmakers with a wide range of reels to match their specific needs and various reeling challenges.

Rolling Mill

2.1 Experimental set up. A Hille-100 rolling mill with rolls of 225 mm diameter and 254 mm length, driven by a variable speed DC motor of 75 horse power, was used. The maximum rolling force, torque and speed are 1500kN, 13kN-m and 70 rpm respectively. The sensor roll nitrided surface hardness is 65 to 70 HRC.

Advanced Process and Quality Control in Hot Rolling …

2007-11-2 · 3.1 Key Feature of Process Control: Detection of Periodic Defects Rolls and rollers are the most heavily used parts of a rolling mill. Due to wear from contacting hot material with great force, their lifetime is limited. Although rolls are refurbished in the roll shop regularly, they occasionally crack before the end of the usual production cycle.

GENERAL ASPECTS OF ROLL COOLING FOR HOT & …

2021-1-18 · rolling mill, dedicated roll cooling systems are required to fulfill the required functions. Examples are suitable roll cooling and lubricationsystems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to control the flatness of the strip in cold rolling mills.

Roll Mill

The mill rolls are hollow to allow flow of coolant (most commonly water) for control of roll and stock temperatures. A number of safety features are incorporated into mill design, including shutoff switches and brakes to stop the rolls quickly, means to move the rolls apart, and guards to keep hands and tools away from the nip area.

B737 NG Flight controls

2013-10-3 · B737 NG Flight controls 1. B 737 NG Ground School. ... Roll Control The roll control surfaces consist of hydraulically powered ailerons and flight spoilers, which are controlled by rotating either control wheel. Ailerons The …

Feed Mill Grinding & Rolling Control Systems | Easy …

Our feed mill grinding and rolling control system adapts to any hammer mill with forward and reverse controls. Constant monitoring ensures your system shuts down safely if the need arises. This control system is designed to maximize …

Technological control for cold rolling processes

2021-2-16 · logical control solutions are available for all kind of materials and types of rolling mills: Break down mills Multi-roll mills Two-stand mills DCR mills Tandem mills Temper mills Foil mills Superimposed strategies and solutions are avail-able for: Pass scheduling and Set-up model Threading and unthreading

Paper Machine Design and Operation--Descriptions and ...

2002-1-15 · 2.6 Dilution Control 22 Voith Module Jet 23 Beloit System 25 Valmet system 26 ... Breast Roll 41 Deckle Rulers 41 Forming Board 41 Table Rolls 42 Foils (Foil blades) 42 Wet Suction Boxes 44 ... 5.19 Pressi ng and Paper Quality 143 Shadow Marking 143 5.20 Future Development of Pressing 143 References 147

Roughing Mill

Roughing mill: Precise control of roll gaps enables better stock control in each pass and avoids excess loading on mill rolls and drive systems owing to improper roll gaps. Faster and precision gap setting increases mill output. • Crop shear: Precise crop length reduces waste of rolling stock. This avoids mis-rolls in finishing mills. •

Shape and Gauge Control of Strip in a Cold Rolling Mill ...

2020-10-6 · Fig 1 Thickness control in a single stand cold reversing mill. For the single stand cold reversing mill, the external controllers are (i) the tension control by torque (TCT) in which the entry / exit tensions are kept constant through the torque regulated by the TC that, in turn, exploits the motors applied to the coiler / uncoiler reels, (ii) the gauge control, feed-back via gap (GBG) in ...

Homepage | kelk

Founded in 1953, KELK is an ISO 9001:2015 certified organization, specializes in the design and manufacture of state-of-the-art electronic measurement equipment used mainly in steel and aluminum rolling mills, paper mills, and mining applications around the world.

[PDF] Flatness Control System of Cold Rolling Process with ...

The automatic flatness control system, IHI Sheetflat, has been applied to many cold rolling mills since 1985. The pneumatic type shape roll is used as the shape sensor. Recently, requirements for quality products have become much more important. Therefore, performance of the shape roll has also been improved to meet the requirements. Strip shape is evaluated based on the …

CUTTING-EDGE COLD-ROLLING MILLS | Primetals …

The most common configuration is the single reversing mill. Various mill designs are offered that include 6-high UCMs (Universal Crown Control Mill), ZR mills and 12-high cold-rolling mills with small-diameter work rolls for the efficient rolling of …

THE MECHANICS OF TENSION CONTROL

2019-2-18 · and rewind zones is very dynamic. Roll diameters are constantly changing, so torque and speed must be constantly adjusted relative to changing roll diameters. Tension and speed in the internal zones is much more stable since roll diameters in these zones does not change. However, some control is required to set and maintain desired levels. Web

Winner''s Engineering Solutions | Rolling Mills

2021-8-27 · 6-Hi Reversing Cold Reduction Mill. Gives the work rolls adequate support at strip edges through the action of the intermediate roll on the back- up roll so that strip shape can be preselected. Improves roll force distribution over the …

The Hot Rolling Process

finishing mills, which will roll the steel in tandem with one another. The workhorse roughing mill has 135" wide rolls for rolling ''broadside'' (as the first roughing mill is commonly called) to make a slab wider. A 5,000 hp motor drives 42"-diameter work-rolls through 28:1 gears to reduce the slab''s thickness by as much as 2-½".

Dynamic analysis and control of strip mill vibration under ...

According to the "Hill rolling force formula", taking particular account of the influence from horizontal vibration of rolled piece in roll gap, a dynamic rolling force model is analyzed. Considering the interaction between vibration of strip and roll, the dynamic vibration model of rolling mill is established. On this basis, the time delayed feedback is introduced to control the …

Modeling and Simulation of Electric-hydraulic Control ...

2008-9-8 · the roll diameter, and the valid deflection of the roll is changed to change the gap figure. Then the strip extend distributes in the landscape orientation well-proportioned to control the shape. According to the different part where the bending force puts down, there are bending backup roll and the bending work roll for the 4-roll rolling mill ...

Practical Roll Techniques

2013-9-13 · As an integral part of a modern roll maintenance program, roll grinding and balancing uses machinery with accurate inspection and measurement equipment. This paper provides practical tips on roll inspections, balancing, grinding and grooving. In addition, we discuss proper roll handling during removal, storage, transport, and reinstallation.

Published June 14, 2013 Practical Roll Techniques: Nip & …

2015-9-14 · rolls are loaded symmetrically by measuring the nip width at the center of the impression and at a point 2" in from either dub. This along with the diameters of the two mating rolls will allow a determination of the . Published June 14, 2013 Practical Roll Techniques: Nip & …

FAG Rolling Bearings for Rolling Mill Applications ...

2019-5-24 · Roll neck bearings Thrustbearings 6 roller bearingsmake itpossible to use smaller surrounding components so thatthe costfor the overall construction can be reduced. Workrollsoffour-high strip mills and rollsoftwo-high fine-section and wire millsare generallyfitted with angular contactballbearings (fig. 10) to carrythe axialloads. The chockatthe ...

Strip Thickness Control of Cold Rolling Mill with Roll ...

2013-11-12 · roll necks due to irregularities in the mill rolls and/or roll bearings [11]. These irregularities cause cyclic deviations in the strip thickness at the output of a mill stand. Figure 3. depicts the effects of eccentricity on the output strip thickness [6]. When the entry strip is passed through the roll stand with 4.1. the velocity . v. in