A hot strip mill (HSM) is a process that rolls steel slabs into coiled strips. The finishing mill (FM), where the strip takes the final thickness, is the most critical process in an HSM because of the great ... Looper i torque reference ˝i Nm Looper i roll radius r m Stand i exit thickness hi m Distance between stand i and i
Displayed assumed δ = 1 when looper roll comes in contact with the results of simulated dynamics of hot strip mills are shown in rolling material, and δ = 0 at noncontact. Figure 5. Time-series data of rolling mills and control systems The equations of dynamics in tension system are described are displayed as dynamic behaviors of hot strip mills.
Back-Up Roll (Undriven) Work Roll (Driven) Looper (Interstand Tension Control) Entry Side Guide (Strip Centering in Roll Bite) 0.125" 0.094" (24.8%) 0.080" (14.9%) 650 fpm 890 fpm 1380 fpm Making, Shaping and Treating of Steel: 101 Mill Configuration FINISHING MILL Work Rolls Back-Up Roll FM Stand 39 40
The Loop Roll Lengths are determined by the range selected in the Loop Tab. The range of values available for loop roll are 1/32 through to 32 bars. Use short loop lengths to create "stutter" type effects. The other difference between loop roll and standard Auto Loop is the "roll" button is momentary (ie. The loop is engaged when the ...
The X-Roll® hot strip mill from SMS group is an all-round talent in hot strip production. It is the proper solution for ultra-thin gauges up to thick gauges for all steel grades incl. LC, ULC, high strength grades, API grades. ... (HSM) are key to efficient production of flat products. Once you have decided to put your trust in SMS group's ...
With regard to the flat rolling process, automatic gauge control technology has been widely adopted to create real-time adjustments of the roll gap in accordance with the feedback of the workpiece ...
In the HSM process, a steel bar is run through several subprocesses in which the primary aim is to roll it into a strip of a given width and thickness before it is wound into a coil and placed into storage. The bar is reheated in one of two furnaces to 1250°c. The Horizontal Scale Breaker then removes as much oxidation from the bar as …
The roll separating force, driving torque and end crop length are the important issues to be controlled for quality production, maximization of yield, minimization of rolled bar process scrap ...
ROT and Looper roll manufacturing facility was developed with in-house R&D and inputs from global partners. ... The selection of coating material & coating process know-how for these rolls is a combination of in-house R&D and inputs from global technology partners. The solid, fabricated or cast rolls are exposed to high technology robotic ...
Abstract. A high level of accuracy and quick response are required in the looper control to keep up with the changes in the operational conditions in modern hot …
Learn all possible Geodätische HSm rolls, view popular perks on Geodätische HSm among the global Destiny 2 community, read Geodätische HSm reviews, and find your own personal Geodätische HSm god rolls. ... They measure how popular your roll is versus the most popular roll for this weapon among the global community. ... The process will ...
The scales must be removed prior to the rolling process to improve the product's surface quality and to prolong work roll life [2]. One very efficient method for effective scale removal is a ...
The force required to generate specified tension in the strip is derived by considering boundary conditions at the roll bites and force adjusted to the strip by the looper roll. The changing ...
The looper table projects an arm carrying a roller across the pass line between stands and it maintains under the torque of the looper motor an adequate tension on the strip once the looper roller has engaged the strip and formed the loop. Initially, the looper arm and roller are in the rest position below the pass line.
The most difficult issues in the looper control system [7] [8][9] are realizing simultaneous control of strip tension and looper angle, since these two interact with each other, leading to a ...
In hot rolling mills, premature failure of rolls is a major concern as it adversely affects the mill operation as well as production. Analysis of failed roll materials and actual rolling conditions in service are therefore necessary to understand the roll failure mechanism and thereby improve the service life of rolls. The hot strip mill referred here …
process engineering R&D electrical and automation systems and manufacturing continually enhance our products so you benefit from top operational reliability and easy maintenance. We manufacture, assemble, and test all key components in our workshops before shipping them to the construc - tion site. What's more, we offer you erection and ...
High Velocity Oxygen Fuel (HVOF) spraying is a group of thermal spraying processes which spray flames at supersonic speeds. The detonation gun (D-gun) process was the first type of HVOF process used. In HVOF processes, kinetic energy of particles is more important than temperature.
A continuous roll-to-roll manufacturing process is a next-generation process for the environmentally friendly and low-cost mass production of functional printed devices.
Abstract: Two robust mutlivariable controllers, H1 and a decentralized quantitative feedback theory (QFT), are designed in the frequency domain for the 2 2 looper system in a steel …
The paper reviews adverse effect of roll wear on performance of the HSM. Factors responsible for higher wear rate of rolls have been studied. Some of the cases have been discussed to show influence of roll wear on HSM parameters like campaign size of rolling, specific roll consumption, surface quality of HR coils, etc.
A study was conducted to better understand mechanisms of work roll degradation in hot strip mills (HSM). The investigations focused on thermal fatigue and oxidation along with influence of roll ...
Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs. The primary function of the conventional hot strip mill (HSM) is to reheat the semi-finished steel slabs (rolled or continuously cast) to the rolling temperatures and then to roll them thinner and longer through a series of rolling mill stands driven by large motors and …
The looper control of hot strip finishing mill is one of the most critical control items in hot strip rolling mill process. It is a highly complex nonlinear system, with strong states coupling and uncertainty that present a difficult control challenge.
Looper angle and looper tension control between roll stands in hot strip finishing mills in adaptive, predictive Proportional Integral (PI) and Inverse Linear …
The simulation results show that the designed control method can track looper angle and tension very quickly, and effectively solve the robust control problem of looper system …
The looper is a roll on a pivot arm which lifts the strip, and is generally driven by an electric motor, although hydraulic or pneumatic drives also exist (Clark, ... An excellent review on modern hot rolling process control in general has been written by Takahashi (2001). Some most recent work can be found in Furlan, Cuzzola, and Parisini ...
A looper installed at inter-stand positions reduces tension variations by changing its angle, so it can contribute to the quality of products. It can also enable …
A high level of accuracy and quick response are required in the looper control to keep up with the changes in the operational conditions in modern hot strip mills, such as operation at higher speed and rapid acceleration on the finishing mill and bigger skid marks, and to achieve improvements in the dimensional accuracy of the products …
The looper control of hot strip finishing mill is one of the most critical control items in hot strip rolling mill process. It is a highly complex nonlinear system, with strong states …
