The CVC work roll on the F7 stand of a 2050 mm hot strip rolling mill was substituted by flat roll for schedule-free rolling and the strip profile was controlled by the existing bending force, the ...
SMS group provides Hot Rolling Mills for flat and long products and for materials like copper, aluminum, steel. SMS groups CSP technology is time and cost saving...
The roll chocks are broadly categorized into 4 types which is shown in fig 3Top Back up Roll Chock 1. Top Work Roll Chock 2. Bottom Work Roll Chock 3. Bottom Back Up Roll Chock Figure 3 Roll chocks Figure 2 Four high stand of reversing cold mill 4. Design of chocks The housing of a work roll or backup roll bearing is known as chock.
SMS DEMAG Hot Strip Mills 4 A slab sizing press in the roughing mill area offers decisive advantages for more flexibility in hot strip pro-duction today and in the future. Width reductions of up to 350 mm in one pass enable the number of different casting sizes in the spectrum of the continuous caster to be reduced to just a few standard widths ...
roll, the roll diameter ratio ranges f rom 1.5 21 work roll to 3.56 9 work roll. T he 4-hi mill is suitable if the work roll diameter is g reater than 13 ratio 2.46 .
Nov 27, 2015 When the roll diameter reduces to less than the minimum diameter required by the mill stand after turning down, then the roll is to be discarded. Stand and roll guide set-up. The goal of mill and the roll guide setup is to get the first bar rolled when changing product, on the cooling bed within the tolerance so that it is a saleable product.
Design dust extraction and collection systems for use with potentially explosive dusts. G ood ... usually onto a two- roll mill, roller die, twin-screw extruder, conveyor, skip hoist, or wheeled truck. ... cooling compound mixed in an internal mixer known as dump mills. ...
Feb 24, 2017 We cooperate closely with lots of mill design companies for the supply of 650mm Mill, 900mm Mill, 1050mm Mill, 1250mm Mill, 1450mm Mill. such as Xian Kairui, CISDI, WISDRI, XHMRI etc. Name Type of material Hardness Hardness deviation Back-up roll 60CrMo, 9Cr2Mo, 86CrMoV7, 70Cr3Mo 60-80 HSD 2-3 HSD
Hot rolled steel, though, doesnt have the best quality. It shrinks slightly during the cooling process. This leaves the metal with internal stresses. The results are non-uniform measurements and some distortions. The materials dimensional tolerances can vary between 25. Also, the surface has a scaly finish. This is a kind of oxide that forms at high temperatures, known as mill scale.
At Precision Rolls Inc., our custom-manufactured products, emphasize our dedication to quality and finish of the roll. Ours is a 45-year history of hands-on control and resultant superior quality of finished parts for major industries, including steel, plastics, aluminum, paper, converting, corrugating and container.
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
Whether its pounds per hour or tons per hour, you can depend on a CPM pellet mill to meet your toughest requirements. Loaded with features like our gear drive train, our pellet mills are built to the highest possible standards and designed to make your job easier, safer, and more efficient.
DELIMON Cooling, Ramsden Court, Ramsden Roll Coolant Systems October 2008 Road, Rotherwas Industrial Estate, Hereford, HR2 6LR, UK. Tel 44 Cooling Roll Coolant Systems The primary functions of Roll Coolant Systems on either Hot or Cold Steel or Aluminium Rolling Mills is to lubricate the surface of the metal and to remove 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.
The Hot Strip Mill represents the most productive solution for flat rolled products. It provides the highest level of productivity together with a large product mix and outstanding quality. Yearly productivity of Hot Strip Mills can vary from 2 to 6 Mtpy, depending on the configuration that is selected.
Dec 10, 2015 The roll design is to take-care the load and torque required for any pass. ... Using roll cooling water outside the recommended pH range leeches the binder from the roll causing premature roll surface failure. ... and hot strip mill are given in Tab 2, Tab 3, Tab 4, tab 5 and tab 6 respectively. The selection of any particular roll depends on ...
5.5.1 Work roll surface change 128 5.5.2 Preheated sample 129 5.5.3 Isotropic feature of hot rolled sample surface 129 5.5.4 Effect of original sample surface roughness 129 5.5.5 Effect of lubrication 129 5.5.6 Effect of temperature 130 5.5.7 Effect of reduction and rolling speed 130 5.5.8 Topography of hot rolled steel surface 131 viii
In this mill the most common type of rolled material is martensitic chromium steel for razor blades. Outgoing thickness is around 0.10 mm. When the coil arrives to KV96 it has been hot rolled, cold rolled, intermediate annealed and in most cases grinded on the surface 2. Flatness measuring the flatness measuring roll
Because hot rolled steel is allowed to cool at room temperature, its essentially normalizedmeaning its free from internal stresses that can arise from quenching or work-hardening processes. Hot rolled steel is ideal where dimensional tolerances arent as important as overall material strength, and where surface finish isnt a key concern.
Climb milling reduces work hardening. It can, however, cause chipping when milling hot rolled materials due to the hardened layer on the surface. Tool deflection during Climb milling will tend to be perpendicular to the cut, so it may increase or decrease the width of
penetrate into work piece radially. o Pitch diameter adjustments on the fly are possible without any tooling and without the removal of the attachment. o Only one dwell cam is required to roll the entire thread rolling range. o Penetration Roll Feed Rate is quickly adjusted via an air control valve.
Feb 10, 2012 6 high reversible mill top back up roll top intermediate roll top work roll bottom work roll bottom intermediate roll bottom back up roll 10 12. DELIVERY TENSION REEL BELT WRAPPER OILER ROLL OUT BOARD BEARING GUARD SUPPORT 11
Aug 12, 2015 Let me help you with a quick back of the envelope calculation. If you are using a 270 Liter Tangential Internal Mixer, you are engaging at least two units of 26x84 two-roll mills in the downstream section. Each 26x84 two-roll mill, requires around 180 kW minimum motor power totaling to 360 kW 180 x 2 only for the mills.
Work roll surfaces for hot strip rolling suffer from consi-derable degradation due to high thermal shocks and addi-tional mechanical load. These shocks and loads produce plastic strain and residual stress. This necessarily leads to nucleation of cracks and forced hot strip mill to tem-porary shutdown, replace work roll or even to work roll