Pudong new district, Shanghai, China.
above control systems, a desired elongation is realized by control-ling the rolling force of the mill by a hydraulic screw-down control system. 2.3 AEC for skin pass mill of continuous processing line 2.3.1 Conventional AEC methods and their problems In most cases, …
The max allowable coil weight is up to 25 tons. Our cold mill operates at a max speed of 1000m/min. AGC/AFC system is available for option. The finished aluminum foil processed by our cold rolling mill is up to 0.08m thick. For higher requirements, the thickness could …
August 2021 for five widely used materials. The index for steel mill products 3more than doubled, rising 111%. The PPI for copper and brass mill shapes soared 67%; aluminum mill shapes, 34%; and plastic construction products, 30%. Thus, contractors whose purchases are weighted toward any of these broad classes of materials are likely to
The auger does not start. The auger is noisy or oscillates between forward and reverse. Alarm 9906 - Chip Converyor Malfunction. The auger does not remove chips. Chip Auger, Conveyor, may start without operator action, even with doors open. M31 …
Manual Testing. To manually test Mill on a small build, you can use the scratch folder: ./mill -i dev.run scratch -w resolve _. This runs the task resolve _ with your current checkout of Mill on the trivial build defined in scratch/build.sc. You can modify that build file to …
Menghui and his colleagues in 2007 in research about control in hydraulic AGC of cold rolling mill used the cascade predictive control by the combination of PID control for the HAGC and dynamic matrix control for the inner loop of the screw-down servo system. This method can hardly solve the problem of gaining the step response of the whole HAGC.
Hydraulic automatic gauge control (AGC) system is the core control system to ensure the thickness accuracy of cold-rolled plate, and the reliability of its load roll system is the key to guarantee ...
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the BISRA principle for gage control. Instead, using a revolutionary control algorithm, FFF has proven in five installations in North and South America, that steelmakers need not replace their ...
Following the threading, dynamic control loops (AGC and AFC) are closed and corresponding actuators are activated. Then the mill speed is increased during the acceleration phase. Once the mill speed is up to the present maximum mill speed, the speed control system will keep the rolling speed in the vicinity of the maximum speed.
An article illustrating and describing typical mill construction of a 4 Hi type, including well known technology of the force AGC gaugemeter systems, hysteresis and roll eccentricity appears in "Iron and Steel Engineer Year Book" entitled, Mill modulus variation and hysteresis--Their effect in hot strip mill AGC, by G. E. Wood et al.--pages 33 ...
MILL CONTROL. Automatic gauge control (AGC) of strip consists of conventional feed forward AGC (FF-AGC), roll position control AGC (BISRA-AGC) based on a gauge meter formula, and also monitor-AGC. In addition to these, mass flow AGC and an AGC system based on decoupling control are included.
system combined with positive methods such as absolute AGC, thereby suppressing thickness amplitude of the steady-state portion and reducing top-end off gauge length. Further, with a view to automating the avoidance of rolling problems in high-load rolling, a new excessive rolling force/ torque avoidance control function has been incorporated.
Monitor automatic gauge control (AGC) based on hydraulic roll gap control system is widely used in modern strip rolling mills [4 – 7]. In monitor AGC system, gauge meter is used to measure strip gauge derivation, which is installed at the delivery side of the finishing mill. The strip thickness can be controlled by adjusting the roll gap.
Machine control system renewal and improvement by Danieli Automation. Steel flat products producer Marcegaglia has contracted Danieli Automation for the technological upgrade of its 20-Hi Sendzimir mill in operation at Gazoldo degli Ippoliti works, Italy. The mill is part of a larger stainless steel cold-rolling complex and rolls 1500-mm-wide ...
The brain of our AGC system is an advanced Digital Signal Processor (DSP) motion control processor. Powered by an 80MHz Motorola DSP56303 processor, the DSP performs all AGC calculations providing critical analog and digital interfaces to the rolling mill.
In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is ...
Be aimed at the difficulty problems that entrance variation in thickness and hardness variation change a lot、back-up roll deflection、roller thermal expansion、the variation of lubricating fluid and flow compensation indeterminacy of servo mechanism in the system of steel plate strip, anti-interference controller is applied to rolling mill AGC control system for the first time in this paper.
Internet of things (IoT) drive system. Hybrid AGC A hybrid AGC for a single-stand rolling mill provides an example of acting on the data that has been collected and analyzed in the sensing and thinking steps (see Fig. 4). The previous control system used the roll gap to control strip thickness and tension reel current to control strip tension.
Once within specification, AGC optimises the mill speed by adjustment of tension, load or gap. At the end of the coil, Auto-Slowdown ensures the product remains in specification for as long as possible and brings the mill to a halt with minimum amount of material left on the coil drum.
Repair of erasable memory module and checkout in the AGC The preferred way to supply erasable memory to the AGC is by repairing the actual module from this computer and running with it in tray B. As previously described, the module has a pin with open connectivity where we should have a inhibit line for bit 16.
The AGC and ITC systems were implemented in the Reliance Automax mill drive controllers. Hydraulic gap control (HGC) and work roll bending pressure regulation were performed by discrete hardware with target reference generation by the mill drive controllers.
AGC CYLINDER TESTING AND REPAIR Ensures reliable performance Hydraulic Automatic Gauge Control (AGC) cylinders are a critical component on rolling mills. These sophisticated cylinder systems automatically adjust the roll gap to provide accurate product gauge control. Cylinder failures can shut a mill down, and cylinders that are
deformation due to mill stretch. In contrast, with monitor AGC, the sheet thickness is measured with a thickness measurement system at the delivery side of the mill stand, and the reading is fed back for screw-down control. Although these two methods were used for a
Through analyzing the 760mm hydraulic AGC production line of a Shandong factory, the characteristics, compositions and the mathematical model of hydraulic system of the hydraulic AGC are introduced.
A-M Cleveland Cold Mill Existing Control System Configuration Level 2 and Setup Model: DEC-Alpha AGC/HGC: Multibus 80/486 and Proprietary HMI Mill Master and Auxiliaries: GEM-80 and Imagem HMI Coil Handling and Other: Modicon Quantum PLC 3 4.
Automatic Gain Control ACG - This project is a digital Automatic Gain Control (AGC) system using a PIC16F876 MCU. The ability to set the gain level in a circuit and have it control itself is a very useful function. This circuit is a building block of another project I am working on. A 30W power amp for either the PCS, iDEN or CDMA frequency bands.
Santanu Chakraborty, in Treatise on Process Metallurgy: Industrial Processes, 2014. 6.5 Rolling Mills. The rolling mill facilities were designed to meet the production requirement of Table 1.The rolling mills complex was proposed to include a light and medium merchant mill with breakdown group of stands for rolling blooms into billets and an intermediate in-line heat compensating furnace; a ...
Fig 1 Structure of a typical automation system for hot strip mill process. Level 0 – It is the lowest level of control and includes, for example, the control loops for hydraulic capsules used to position the rolls in the rolling mills and for the main electric motors powering the mill.. Level 1 – It is primarily concerned with in-piece control. At this level, the quality parameters such as ...
A gauge and tension control system for a tandem mill comprises a delivered strip thickness deviation calculating unit for detecting output strip thickness at each of rolling stands, a tension calculating unit for arithmetically determining interstand tensions between two adjacent rolling stands on the basis of armature currents of drive motors and rolling loads at every rolling stand, a memory ...
Automatic rolling process is a high-speed system which always requires high-speed control and communication capabilities. Meanwhile, it is also a typical complex electromechanical system; distributed control has become the mainstream of computer control system for rolling mill. Generally, the control system adopts the 2-level control structure—basic automation (Level 1) …
above control systems, a desired elongation is realized by control-ling the rolling force of the mill by a hydraulic screw-down control system. 2.3 AEC for skin pass mill of continuous processing line 2.3.1 Conventional AEC methods and their problems In most cases, …
Hydraulic pressure automatic gauge control (AGC) system, with high accuracy, fast response, etc., becomes the core technology of strip rolling mill [2], and it is still the key part of a magnesium ...
CSP rolling mill abnormal vibration problem is one of the worldwide difficult problems in rolling fields. In this article, using the modern acceleration telemetry system, an integrated test is taken to the rolling mill vibration and the laws of the mill vibration are captured. The test shows that there is severe horizontal vibration of roll system, especially the work rolls, at the same time ...
4. ELECTRICAL SYSTEM 4.1 COMPOSITION The system consists of alternating current contactor (-K), red emergency button (-S1), green (-S2), pilot (-HL), micro switch (-S3,-S4,-S5), shift switch, etc. The system has the protection of lose-voltage, and cutting off the current when the cover is open. NOTE: Not all BT800/BT500 have the limit switches.
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