Introduction. There are two types of 18 roll hydraulic rolling mill—Zhigh type and Shigh type, in which 4 sets of side support devices are added to the HC six roll mill. The rolling mill is suitable for processing stainless steel, carbon steel and nonferrous metal strips. Our company has independently developed and designed costeffective ...
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The vibration phenomenon of the rolling mill always exists during working. The vibration of the rolling mill not only reduces the quality of the products, but also damages the equipment in severe cases and even leads to huge economic losses [1, 2].In order to avoid the vibration of the rolling mill, a lot of research work has been carried out in recent years [3,4,5,6,7].
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The vibration of the vertical system of a cold rolling mill is a major concern for factory production. In factory production, it is found that the thickness control system with dynamic stiffness compensation of the rolling mill has a significant impact on the rolling mill vibration. In this work, a mechanical hydraulic coupling vibration model of a cold rolling mill with a thickness control ...
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rolling mill was derived analytically using the factors causing negative and positive damping [8]. However, up till now, to remove chatter completely remains ... Applying nonsynchronous pulsating rhythm to a hydraulic fluid supplied to hydraulic component of the stand,, hydraulic cylinders employed to control strip gauge [13,14] 2 To ...
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Vertical vibration model of strip mill is established by considering piecewise nonlinear constraint arising from hydraulic cylinder. The approximate analytical solution of the model is obtained by incremental harmonic balance (IHB) method. The harmonic frequencies not conducive to stability are produced because the nonlinearity of the piecewise constraint. Bifurcation behavior of the system ...
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The performance of hydraulic system plays an important role in roller mill. The hydraulic system was regarded as a vibration system with a single degreeoffreedom and the differential equation of ...
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BRANT HYDRAULICS offers a viable and professional alternative for repair and / or replacement of these most critical cylinders, with bore diameters typically around 1250 mm. A typical cylinder used as the primary roll force device in a steel or aluminum rolling mill must operate trouble free at loads/ pressures up 45MN/ 450 Bar, for many years.
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Highprecision suppression technology for the cold rolling mill control precision of hydraulic AGC system is put forward higher requirements. On the basis of related theory introduction, the article respectively analyzes the forward feedback AGC, monitor AGC system and a second flow control AGC system in detail, and expounds the various factor's influence on the control precision of the system ...
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The hydromechanical screwdown mechanism of rolling mill includes driving pressure screw with a nut, spherical bearing and pressure hydraulic cylinder which case leans on the cushion of upper roll. The piston is located under bearing of the pressure screw and is fixed on screw, linear displacement sensor is built in the case of the hydraulic cylinder along its axis.
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during the rolling process. The main structure of mill is shown in Fig. 2. Hydraulic system includes hydraulic tension system at the front and rear of the mill, hydraulic down system and hydraulic balancing system. Both ends of the rolling sample are fixed through both side hydraulic chucks, and the tension is produced by hydraulic cylinders.
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The stable operation of strip rolling mill is the key factor to ensure the stability of product quality. The design capability of existing domestic imported and selfdeveloped strip rolling mills cannot be fully developed, and the frequent occurrence of mill vibration and operation instability problems seriously restrict the equipment capacity and the production of highend strip products. The ...
WhatsApp: +86 18838072829![[PDF] Investigation of the Hydraulic Servo System of the Rolling Mill ...](/sb3y2d4/384.jpg)
In order to improve the disturbance rejection ability and tracking accuracy of the hydraulic servo system of the rolling mill, this study combines nonsingular terminal sliding mode control (NTSMC) with active disturbance rejection control (ADRC). A fourthorder extended state observer was designed to estimate the disturbance of the system in ...
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The hydraulic control system that is connected with rodless cavity 28 both can be arranged in the rolling mill hydraulic control main system, also can independently the former situation, provide hydraulic oil source 8 by the rolling mill main hydraulic system, by the control of reversal valve 18, realize supercharging and offload to ...
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The hydraulic system of the rolling mill is presented in Figure 1. Condition monitoring and diagnosis of a steel rolling mill requires a variety of measurement techniques.
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SCHEMATIC DIAGRAM OF 6 HIGH ROLLING MILLS Hydraulic jack Back Up roll Back up rolls Intermediate Pinch rolls Pinch Rolls rolls Pinch rolls ... OPERATIONAL INSTRUCTIONS A rolling mill should operate at its maximum power or maximum speed. It becomes obvious that poor shape prevents productivity, by reducing speed.
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The proposed onestand hot tandem rolling mill was constructed using 60 mm diameter work rolls, 150 mm diameter backup rolls, 120 mm diameter spur gears, a 3 hp electric motor, and a 50 mm ...
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Optimization Strategy of Rolling Mill Hydraulic Roll Gap Control System Based on Improved Particle Swarm PID Algorithm by Ying Yu 1, Ruifeng Zeng 1, Yuezhao Xue 2 and Xiaoguo Zhao 1,* 1 School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2
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Quaker Houghton | volgers op LinkedIn. Forward Together | Quaker Houghton (NYSE: KWR) is the global leader in industrial process fluids, with more than 4,000 employees including chemists, engineers and industry experts, and operations in over 25 countries. Our customers include the world's most advanced steel, aluminum, automotive, aerospace, offshore, can, mining, and metalworking ...
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The conversion allows the standard 4high rolling mill design to roll lighter gauges without the many deficiencies of a 4high rolling mill. Our current equipment include: 26" x 72" 2High Lewis w/Roll Bend. " x 16" x 20" American 4High w/Terminal Equipment. 16" x 20" x 48" 4High 2/3,000 HP DC Drives.
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A hydraulic cylinder has many advantages in practical application and is widely used in the hydraulic screwdown device of a rolling mill. In this study, we consider a doubleacting singlepiston servo hydraulic cylinder in a hot rolling mill as an example for the analysis; its structure diagram is presented in Figure 2.
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When rolling with automated profile control is introduced at the plate mill, it imposes strict requirements to accuracy of automated gauge control. The structure of the Hydraulic Gap Control (HGC ...
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One blender defines the maximum suitable water level as 500 ppm (%) to ensure optimum lubrication, viscosity and useful oil life. In the field, it's not unusual to encounter rollingmill oils that look like chocolate milk or mud (cloudy), with water levels from 3000 ppm (%) up to 150,000 ppm (15%).
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Abstract: Matching load modes of the drives of the top and bottom rolls of rolling mill stands is an important scientific and practical problem. Solving it is relevant for the drives of reversing stands of modern plate mills. The solution complexity is caused by the need for matching load balancing mode with the mode of forming a bend of the head end of the strip plate at the stand outlet.
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يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
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