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methods to control eccentricity in forged rolls Abstract: This paper proposes the eccentric problem in the coiling process of cold rolling mills. The wavelets -resolution control method is designed: A wavelets -resolution controller is introduced in the control cycle of coiling tension control, whose purpose is to acquire the element caused by periodically change of the coiling ...
Forged crankshaft and method for manufacturing the forged crankshaft Download PDF Info Publication number EP2933039B1. EP2933039B1 EP13863523.0A EP13863523A EP2933039B1 EP 2933039 B1 EP2933039 B1 EP 2933039B1 EP 13863523 A EP13863523 A EP 13863523A EP 2933039 B1 EP2933039 B1 EP 2933039B1 Authority EP European Patent Office Prior art keywords dies rough .
1. Description Work shaft roll for Cold rolling mill machine, for rolling high carbon steel coils The forged rolls are widely used on some tough stands of hot rolling mill, such as BD stand and blooming stand to perform with excellent strength to avoid some rolling accidents. Meanwhile, it is also a good choice to work on the cold rolling mill as backup roll and work roll.
information for citizens to secure access to information under the control of public authorities, ... 2.2 Additional forging allowance due to eccentricity in stepped shafts including rolls shall be calculated as given in Fig. 1. The value so calculated shall be added to the diameter when I> 8dl and di/dz or dt/ds > 1'6. u iij 5 20 -- 25 .- 30 'ii 5 15 .- 20 -- 25 s $ 10 -- 15 -- 20 z! 5 ...
ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED, ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM Francis Wagner, Manager Rolling Mill Automation Hatch Associates Consultants, Inc, Buffalo, NY, USA ABSTRACT: The Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the, Chat Now; .
Cite this article: BIAN Haitao,YANG Quan,ZHONG Tian. Control of Roll Eccentricity Compensation Based on RBF Network[J]. Iron and Steel, 2007, 42(11): 42-0.
Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation. Get Price. ROLL ECCENTRICITY COMPENSATION (REC) - primetals . Rolls in rolling mills are never completely round but have eccentricity which can be caused by: • grinding inaccuracy • non-uniform thermal .
1975-05-06· A control system and method are disclosed to operate with at least one roll stand of a rolling mill to determine the magnitude and phase relationship of the eccentricity of each back-up roll of a four high roll stand, to monitor the rotation of the back-up rolls during the rolling process, and for each back up roll to correct the roll vertical position as a function of the roll angular ...
Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation. Get Price. ROLL ECCENTRICITY COMPENSATION (REC) - primetals . Rolls in rolling mills are never completely round but have eccentricity which can be caused by: • grinding inaccuracy • non-uniform thermal expansion • asymmetrical adjustment of .
As roll eccentricity control method (elimination method) two types are studied. The first is command method, and the second is feedback method which lessens rolling mill stiffness by a control scheme, for roll eccentricity frequency only. The latter feedback method is proven to have sufficient control ability. By these studies, an economical analog correlation type roll eccentricity eliminator ...
Download Citation | Phase-domain filtering pick-up method for roll eccentricity compensation control | A phase-domain filtering pick-up method for roll eccentricity compensation control is ...
A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting ...
ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED, ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM Francis Wagner, Manager Rolling Mill Automation Hatch Associates Consultants, Inc, Buffalo, NY, USA ABSTRACT: The Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the, Chat Now; .
Roll eccentricity compensation control for strip rolling mills based on wavelet packet de-noising theory ... this paper designed a wavelet packet analyzer of roll eccentricity (WPARE) to eliminate noises and useless frequencies in rolling force signal. By combining WPARE with a compensator, the rolling force influenced by the workpiece in a rolling process could be examined, and it can be fed ...
Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum
A 2-D diagnosis technique of the eccentricity of the roll by the using frequency analysis has been reported (Tahk and Shin, 2002). Eccentricity compensation methods have been proposed for tension control (Shin, 2003; Shin, 2000) and for roll gap control (Kugi et al., 2000). But most of the previous studies handled the fault diagnosis of roll
Abstract: A method of eliminating thickness changes in material exiting a stand or stands of a rolling mill, the changes being caused by the eccentricity of one or more rolls of the mill. The method includes the steps of engaging the material with a device that measures the tension of the material entering or leaving the mill and using said device to measure directly a change in .
Roll eccentricity compensation control for strip rolling mills based on wavelet packet de-noising theory ... this paper designed a wavelet packet analyzer of roll eccentricity (WPARE) to eliminate noises and useless frequencies in rolling force signal. By combining WPARE with a compensator, the rolling force influenced by the workpiece in a rolling process could be examined, and it can be fed ...
Roll Eccentricity Phase Identification System. Authors: Yang Yang, Yi Qun Wang, Zeng Wang Zhang
The roll force AGC(RFAGC) controls the roll force to adjust the roll gap and the tension AGC controls the roll speed. And the monitoring AGC controls the roll gap by calculating devia- tion between the exit thickness and the required thickness. In a flnishing mill process, the RFAGC and monitoring AGC is .
A 2-D diagnosis technique of the eccentricity of the roll by the using frequency analysis has been reported (Tahk and Shin, 2002). Eccentricity compensation methods have been proposed for tension control (Shin, 2003; Shin, 2000) and for roll gap control (Kugi et al., 2000). But most of the previous studies handled the fault diagnosis of roll
1987-07-01· Eccentricity Estimator A number of measurements including roll force, measured exi t thickness and ro11gap position contain strong evidence of the presence of roll eccentricity effects when closed loop "gaugemeter" control is applied in the absence of eccentricity control. Intui tively therefore, the choice of a force or thickness measurement would seem appropriate as an input signal to the ...
A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting ...
Diameter, Eccentricity, concentricity. The diameter of an object can be established in different ways. If the center of the object is known, a single sensor is sufficient for the measurement whose result is evaluated with the position of the center point or the axis. If the position of the center point is not known, the diameter is measured directly using two sensors. The distance .