About Us

VolPort, the leading enterprise of Chinese crushing and grinding industries, has always been dedicated to the development of ore crushers, sand-making machines and industrial grinders in the past 30 years.

Contact Us

Internal Cooling Hot Design Work Roll Mill

Effect of pass schedule and groove design on the metal ...

The deformation behaviour of a hot rolled micro-alloyed steel bar of grade 38MnVS6 was examined using an FEM model during the initial passes in a blooming mill, as a function of three different pass schedules, roll groove depth, collar taper angle and corner radius. The simulations predicted the effective strain penetration, load, torque, fish tail billet end …

About Jindal Steel & Power Ltd

in high shape factor rolling and thus reduces the internal discontinuities. The rolling mill is supported by high speed automatic gauge control, work roll anti bending and shifting equipment, smart crown facility, plan view rolling, profile & flatness gauges. ... Thermo-Mechanical Controlled Rolling and Accelerated Cooling Hot Leveller 10

What is Annealing? A Complete Process Guide - TWI

The crystal grain size and phase composition depend on the heating and cooling rates and these, in turn, determine the material properties. Hot or cold working of the pieces of metal following annealing alters the material structure once more, so further heat treatments may be required to attain the desired properties.

Rubber Compounding - an overview | ScienceDirect Topics

The mill rolls are hollow to allow flow of coolant 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.

Iron & Steel Industry | PILLWAX Industrial Solutions ...

Process Improvements in Internal and External Quality, Process Stability, Throughput and Yield. Projects on modernization and new Plant Equipment and Technology as Ladle Turret, Tundish Cars, Tundish Design, Mold and Oscillator, Strand Guidance and Secondary Cooling, Withdrawal Units, Torch Cutting, Marking, Roller-Tables and Cooling-Beds, direct Hot …

Mechanical seal technology and selection

0 – basic design 1 – leakage drain 2 – cooling flange 4 – leakage drain + cooling flange Drive 1 – set screw 2 – shrink disk 3 – clamping collar 4 – key 5 – flange (shaft sleeve) 6 – shaft sleeve with flange and key 7 – clamping set 8 – muff coupling 9 – customer-specification l s E F Kühlflansch tmax = 350 °C

1. Hot rolling and rolling defects: 1.1 Front and back ...

Hot rolling and rolling defects: ... Roll force is equal to roll pressure multiplied by area of contact between roll and work. ... Mill spring is a defect in which the rolled sheet is thicker than the required thickness because, the rolls get deflected by high rolling forces. Elastic deformation of the mill takes place.

What Is Hot Rolled Coil? | Soultiply

The cooling process of hot rolled steel is done at room temperature, meaning that the steel is normalized and free from internal stresses that can result from work-hardening or quenching processes. The forming factors of cold-rolled and hot coils

Novel three-dimensional multi-objective numerical modeling ...

Wang XD, Li F, Li BH et al (2013) VCR back-up roll and negative work roll contour design for solving roll spalling and transfer bar profile problems in hot strip mill. Ironmaking Steelmaking 37(8):633–640. Article Google Scholar 15.

Hot rolling mill process and hot rolled steel sections ...

Hot rolling is an industrial process for re-working principally steels but also stainless steels. Steelworks melt the material. To make it transportable, the melted steel cools down in different shapes. The process of hot rolling sections. These shapes can be either blooms, billets or slabs.

CHINA STEEL - csc.com.tw

The hot rolled plant whose annual production capacity is 7 million tons operates on two lines of hot strip mills. In addition to the basic rolling facilities, it is equipped with a variety of cutting-edge facilities such as the edge heater, the hydraulic automatic gage and width control system, the work roll bending system, the work roll shift system, and the automatic profile and flatness ...

GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD …

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.

ANALYSIS OF SURFACE THERMAL BEHAVIOR OF WORK …

the work roll of a rolling mill. The considered hot rolling mill consists of two hollow cylinders receiving heat in contact with the work piece and cooled by convection on its internal and external surfaces. Hsu et al. [19] considered a three dimensional inverse model for estimate the surface thermal behavior of the work Roll in hot rolling ...

High-performance Product Series for Steel Production ...

・Developed four-row tapered roller bearings for hot-strip mill work rolls ... ・Designed for maximum load rating; internal design reduces contact stress ... ・Water-cooled structure with high cooling efficiency Features Approx.2.4-fold Max.30% increase (approx)

Roll Cooling | Lechler

Roll cooling: General aspects of roll cooling for hot & cold rolling mills (copy 2) Contribution paper – 06/2010 David Tucker Read now (pdf, 839 KB) Roll cooling: Flatness and profile the problems that can exist in the design of the spray actuators Contribution paper for The Institute of Materials, Minerals and Mining, Achieving Profile ...

Mechanical Engineering.: plastic manufacturers guide of ...

When the plastic is sufficiently rigid, the cooling and mold rotation is stopped to allow the removal of the plastic product from the mold. Rotational molding, known also as rotomoldingor, rotocasting, is a process for manufacturing hollow plastic products. For certain types of liquid vinyls, the term slush molding is also used.

A Basic Understanding of Chill Rolls - Paper, Film & Foil ...

These locations are hot spots. They result from blockage in the cooling passages of a roll. An internal acid flush or removing the outer shell and cleaning the internal passages will remove the restrictions. Construction Three types of common chill roll construction are double shell spiral baffle, cooling can, and single shell.

Powder metallurgy – basics & applications

discharge material is 40-10 mm. The mill speed varies from 12 to 30 rpm. Planetary mill: High energy mill widely used for producing metal, alloy, and composite powders. Fluid energy grinding or Jet milling: The basic principle of fluid energy mill is …

Roll Cooling – Heat Transfer and Fluid Flow Laboratory

The cooling of work rolls is an important process in the hot rolling technology and cannot be taken as a marginal issue. The Heat Transfer and Fluid Flow Laboratory designs cooling of rolls to reach their long working life while rolled product is still well heat treated.

INFLUENCE OF ROLLING MODES ON THE ANISOTROPY OF …

erties of hot-rolled and cold-rolled strips was searched at this work. As the research material, we used samples of S235JR carbon steel rolled on LWM in cold and hot con-ditions from thickness of 8 mm to thickness of 1,5 mm. Flat samples oriented at an angle of 0 ° 45 ° and 90 ° relative to the direction of rolling were cut from hot-rolled ...

(PDF) STEEL_DESIGNERS_MANUAL_SEVENTH_EDITION.pdf | …

Academia.edu is a platform for academics to share research papers.

Cold rolling technology for carbon - ANDRITZ

Mill drive-train systems Work roll bending systems Hydraulic roll load cylinders Pass line adjustment devices e.g. wedge-design Roll change devices Emulsion systems (revamp or new) Selective roll cooling spray headers Automatic work roll change equipment

Calculating Cooling and Heating Loads | Broughton EAP

Estimation of Required Cooling/Heating Capacity. To accurately calculate the required amount of heating and/or cooling required for an environment is a time consuming and very complicated job which is usually something done at the point of building design and/or fitting of an air conditioning and heating system. This article, although long, shows you how a qualified refrigeration …

(PDF) OPTIMIZATION OF WORKING ROLL COOLING IN …

roll cooling, rolling mill, heat transfer, hot rolling, nozzle, roll crown ... Internal temperatures are recorded and the cooling intensity is evaluated by an inverse task. ... sensors embedded in ...

Hot & Cold Working and the Rolling Process

In conventional hot strip production, slabs of thickness of about 250mm are heated in a furnace and are reduced to 30 to 60mm in thickness after passing through the roughing mill, and then further reducing it to within a range of 0.8 to 25.4mm by rolling in the finishing mill.

Rolling of Metals

Rolled Metal Characteristics • Residual stresses • Dimensional tolerances for cold-rolled sheet thicknesses +/- 0.1 mm to 0.35 mm (0.004 to 0.014 inch) • Flatness tolerances to within +/- 15 mm/m (3/16 inch/foot) for cold rolling, +/- 55 mm/m (5/8 inch/foot) for hot rolling • Hot rolling and sand casting produce similar ranges for

FURNACES AND REFRACTORIES - Modern Eq

2.1.2 Re-rolling mill furnace a) Batch type A box type furnace is used as a batch type re-rolling mill. This furnace is mainly used for heating up scrap, small ingots and billets weighing 2 to 20 kg for re-rolling. Materials are manually charged and discharged and the final products are rods, strips etc. The operating temperature is about 1200 ...

Understanding different types of heat treatment: Annealing ...

Because air cooling is relatively uncontrolled, variations in grain size and microstructure can occur. This often explains the different performance of one mill over the other during forming, even while meeting the procurement specifications. Figure 2: CCT of AISI 4140, overlaid with a cooling rate of 0.005°C/s (18°C/hr).

Roll Cooling Spray Systems | USC | United States Controls

United States Controls Selective Roll Cooling and Heating System's proprietary valve design offers mill operators superior flow performance, wear resistant components and easy maintenance. Typically, these self-cleaning valves require no maintenance for at least five years and are constructed of high quality, stainless steel internal ...

Stainless Steel Cladding and Weld Overlays

Design considerations and the welding of stain­ less-steel-cladcarbon and low-alloy steels are also addressed. Additional information can be found in Ref 1to 3. HotRoll Bonding (Ref 3) The hot roll bonding process, which is also called roll welding, is the most important com­ mercially because it is the major production

Rolling (metalworking) - Wikipedia

Hot-rolled metals generally have little directionality in their mechanical properties or deformation-induced residual stresses.However, in certain instances non-metallic inclusions will impart some directionality and workpieces less than 20 mm (0.79 in) thick often have some directional properties. Non-uniform cooling will induce a lot of residual stresses, which usually occurs in …

Rolling of steel in Hot Strip Mill – IspatGuru

The combination of roll gap cooling, roll gap lubrication and improved exit side cooling systems reduces the roll temperature. This results in a thinner oxide layer on the roll surface with less work roll peeling for consequence. Lubrication inside the roll gap minimizes friction, thereby enabling rolling force reduction of 20 % to 30 %.

HOT ROLLING PRACTICE – An Attempted Recollection

motors. These are known as mill stands. The layout of a rolling mill varies, from a simple single stand mill to several stands positioned either side by side or in a line. A mechanism, commonly called a roller table, directs the work piece to the rolls, and another roller table for handling the pieces emerging out of the roll.

US3665746A - Combination rolling mill - Google Patents

A cartridge loadable combination mill for rolling beam, structural or plate products. The combination mill includes a pair of cartridge or cartridge-like loaded mill stands, the first of which has a movable mill housing and the second of which is adaptable to being moved out of the mill line. The cartridges contain a pair of horizontal and vertical rolls that are aligned and adjusted …

Steel and Pipe Mill Techology - EOLSS

not just the pipe mill. For example the pipe purchaser and the pipe mill need to ensure the raw steel ingots and slabs are suitable. Each rolling mill uses a unique deformation and accelerated cooling practice to roll the steel plate, the pipe mill forms and welds the pipe and then tests to ensure the required geometry, strength and toughness