2 edition of investigation into strip tension control on a cold rolling mill found in the catalog.
investigation into strip tension control on a cold rolling mill
Mark R. Veryard
|Statement||Mark R. Veryard ; supervised by S. Duncan.|
|Contributions||Duncan, S., Control Systems Centre.|
The rolling mill process consists of introducing a strip inside two rotating rolls causing a permanent de-formation in this strip, it is called thickness reduction. The stands, and rotary rolls, are the machines that make the rolling mill process. A Tandem Rolling Mill is a set of rolling mill . izations of cold rolling mills. This has been proved by numerous references during the last few years, some of press helps to increase strip tension prior to the first mill stand, especially when rolling thicker strips, which is cold rolling mill in São Francisco do Sul in the state of San-ta Caterina, Brazil, so as to be able to boost.
The invention relates to a method for lubricating and cooling rollers (3,4,5,6) and metal strips (2) on rolling in particular, on cold rolling of metal strips (2), wherein, on the inlet side (7 a) a minimal amount of pure lubricant (9) without a high water content is continuously supplied in an online controlled manner with a controlled viscosity and lubricity depending on a number Cited by: The control in an investigation is something that is not changed in an experiment. Lets say you have and experiment were you are applying sunlight to plants to see how much sunlight affects the plant.
COMBINED TEMPERING AND TENSION LEVELING LINE Intended for cold rolled strip, annealed cold rolled strip and hot deep galvanized strip Manufacturer Siemens VAI Clecim YoM Note: this line consists of two independent units: one temper mill and one tension leveler. Strip/Material Strip width – mm Strip thickness 0,2 – 1,5 mmFile Size: 1MB. The dynamic model of cold rolling mill based on strip flatness and thickness integrated control was proposed, containing the following sub-models: the rolling process model, the dynamic model of rolls along axial direction, and the compensation model. Based on the rule of volume flow rate, the dynamic rolling process model was by:
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In the metals industry, tandem hot strip rolling mills are used for rolling out thick semi- nished products, e.g., slabs, to thinner at products. The product, which is often referred to as strip, is clamped in each mill stand of the rolling mill train (cf.
Fig. As longitudinal tensile stresses in the strip File Size: KB. Robust Tension Control of Strip for 5-Stand Tandem Cold Mills.
Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand by: 3.
Cold Rolling Process Overview. The tandem cold rolling of metal strip is one process in a sequence of processes performed to convert raw mate-rials into a finished product The rolling strip contact length can be approximated . It is a deformation process in which the thickness of the strip File Size: KB.
A system of optimal control tension of the rolled strip cold rolling temper mill, taking into account the variable technological parameters and the elastic connection of the first and second kind with the use of complex models of the rolling elements of the electromechanical equipment production. The problem can be split into two parts, rolling a 12, or rolling a 4 or less.
This can be further broken down to rolling a 2, rolling a 3, rolling a 4, or rolling a When the rolling mill is running, it shows violent vibration and the following strip exhibits stripes sometimes, leading to cut off or breakdown of the machine. In field testes, this kind of phenomenon is found by accident, when the tension of rolling mill is a fixed value, and the vertical-vibration of the rolling mill is very by: 9.
tension control. AdviseIT for Cold Rolling Mills: for monitoring and diagnosis of strip thickness and flatness quality. 2 1 Cold rolling of flat metals products involves controlling a multivariable process with couplings, which is subject to significant disturbances and parameter drift.
1 Advanced Mill Control Entry thickness variationFile Size: KB. Cold rolling experiments were conducted on a STANAT experimental rolling mill. The mill was driven by a 12 kW DC motor, through a four-speed gearbox. The top surface speed of the rolls was mm/s.
Hot strip rolling mills are characterised by a process which has many interactions, is distributed with dominant transport delays and has a lack of measurements due to the severe environment. There is ever increasing market demand for better product quality of the steel strip hence the requirement for higher performance by: to the second pass, the tail end is inserted into the gripper of the entry tension reel to allow the strip to be wound several rounds around the tension reel, specified reduction is carried out in the mill, and tension between the mill and each reel is establis hed; after that, rolling of the second pass is started.
The authors made an experimental study of deformation behavior at strip edges, followed by an investigation into the characteristics of edge drop control on a tapered-crown work roll shifting mill. The cold rolling industry has developed over the past few decades into a mo-dern supply sector.
Precise geometrical and material properties are set in con- Steel plant → Hot rolling mill → Cold rolling mill → Cold rolled steel strip processor. • Use of online instrumentation and control circuits in hot and cold rolling mills. enhanced technology for the various mill Cold rolling mill type Typical mill stand types Production capacity (t/y)* Strip speed Type (m/min)* functions.
This allows to produce cold Single-stand reversing mill 4-high, 6-high, (S6-high)–up to 1, DiscontinuousFile Size: KB.
Cold rolling is a process by which the sheet metal or strip stock is introduced between rollers and then compressed and squeezed. The amount of strain introduced determines the. Tension feed-forward control The tension feed-forward control responds to entry thickness deviations and applies a suitable adjust-ment to the coiler torque in order to consider the in-teractions between roll gap and tension.
Important sensors in a cold rolling mill Laser speed sensor Thickness gauge ABB Stressometer ABB Strip scannerFile Size: 1MB. A Review on Chatter Analysis in Cold Rolling process. JOJ Material Sci. ; 2(1): DOI: /JOJMS Juniper Online Journal Material Science Among these chatter, both third and fifth octave mode of chatter are related to vertical vibration of rolls.
Third octave. The mill parameters that affect friction in the roll bite are investigated, as well as the effective methods to control the roll bite friction as a means of eliminating skidding in cold strip rolling.
Referred to as “ultra-thin rolling control,” the system is essentially an adapted control concept that has been successfully applied many times in tandem cold mills.
When rolling below a certain strip thickness, the control mode is switched from speed control to roll-gap control while the strip tension. In the conventional hot strip mills the minimum strip thickness rolled was (1,5) 2 mm.
In thin-slab continuous-cast rolling mills the strip rolled thickness is below 1 mm and the strip caster aims to cast between 2 and 1 mm. In the past it used to take weeks to produce coiled strip from iron Size: 3MB.
Causes of Gauge Variation Analysis of Gauge Variation Effect of roll gap setting Effect of entry thickness Effect of mill stiffness Effect of workpiece stiffness Main Factors Affecting Gauge Performance Disturbances from mill mechanical and hydraulic equipment Disturbances from mill control systems Distributions from incoming rolled product Gauge Variation in Hot Strip Mills Effect of Strip Tension on Gauge Effect of Mill Speed on Gauge Effect of Mill.
With the publication of this book, newcomers to the field of steel rolling have a complete introductionto the cold rolling process, including the history of cold rolling, the equipment currentlyin use, the behavior of the rolling lubricant, the thermal and metallurgical aspects of the subject, mathematical models relating to rolling force and power requirements, strip shape, and thefurth er 4/5(5).maximum rolling speed of a cold or foil mill, 8 meters of strip is produced.
It is easy to see why Automatic Gauge Control (AGC) is an essential component of modern rolling mills. Comprehensive AGC algorithms incorporate readings from dozens of sensors around the mill.
Some of the key AGC input parameters are speed and tension. (See Figure 1)File Size: KB."This state-of-the-art volume examines steel-rolling technology in a systematic and comprehensive manner--providing an excellent synthesis of current information from three different branches of science--physics, metallurgy, and engineering/5(2).