Working Principle of Aluminum Foil Rolling Mill
2016/12/30 14:31:45
With the accelerated process of industrialization in China, aluminum foil industry has also been rapid development, mainly due to the growing demand for aluminum foil, aluminum foil production you want to achieve, certainly inseparable from the aluminum foil mill, the staff must To understand the working principle of aluminum foil rolling mill, when the aluminum foil mill mechanical failure, the need to determine the cause of failure in time to ensure that aluminum foil rolling mill back to normal as soon as possible.
In the production of aluminum foil used in the negative stick seam rolling, which is different from other strip production methods, usually ordinary strip production in the production will have a certain amount of stick joints, and aluminum foil rolling mainly rely on two work rolls , Two work rolls will have a certain force on the aluminum foil, so that its elastic deformation, and the frame of the rolling force is greater than the metal deformation resistance, which makes the rolling force on the aluminum foil thickness decreases, then the thickness of aluminum foil The control is mainly controlled by the rolling speed and the unwinding tension. Aluminum foil is special, the requirements of raw materials, and production of easy to break, usually only 0.1 ~ 0.2mm thick material, need to squeeze through the work roll squeeze closer, and then make the quality of aluminum foil, wider format, Thinner, more secure.
Basic Structure of Aluminum Foil Rolling Mill
Generally speaking, aluminum foil rolling mill consists of five parts, namely, open-book machine, coiler, work base, drive system, ancillary equipment. Which work frame and ancillary equipment composition is more complex, and the most critical is the control system, if there is no perfect electrical control system, it can not ensure the thickness of aluminum foil. Aluminum foil rolling mill is usually divided according to the stick surface width, divided into small rolling mill, medium-sized mill, large or wide rolling mill. The width of the small rolling mill is less than or equal to 1200 mm, while the width of the medium rolling mill is between 1,200 mm and 1,800 mm and the width of the large rolling mill is greater than or equal to 1800 mm. The rolling speed required for each type of rolling mill is different, and the rolling speed is usually 1200m / min, which is called high-speed rolling mill. The speed will directly affect the production efficiency of aluminum foil rolling mill.
Working Principle of Aluminum Foil Rolling Mill
With the rapid development of the times, aluminum foil industry has also been rapid development, aluminum foil production technology and technology continues to increase, and the market demand increased, then we must improve the aluminum foil product shape accuracy, product design level to enhance, to Wide rolling mill direction, but also to the aluminum plate shape precision put forward new requirements. In the aluminum foil rolling is used in the negative stick seam rolling, plate-shaped control and roll tilt and hydraulic bending sticks are not much relationship between the more need to be considered should be the relationship between the work roll and support roller diameter ratio and Stick width. At present, China's rolling mill manufacturers have begun to use variable convex stick as a backup roller, also known as VC stick, this support roller can effectively improve the quality of plate shape, to eliminate the partial parabolic plate-shaped deviation. Improve production accuracy.
The VC stick is usually composed of three parts, including the mandrel, sleeve, rotary joint, which is a combination of support roller, but also a fluid chamber between the mandrel and sleeve, by adding in the fluid chamber High-pressure oil, with the pressure changes. But also at both ends of the sleeve with an external seal to shrink up, which helps roll the free slip. VC stick works is when the high-pressure hydraulic station hydraulic oil in the hydraulic servo control system under the action of rotating joints into the fluid chamber, so that can expand the sleeve, mechanical convexity can make up the mill in the normal work . & Lt; / RTI & gt; And VC stick diameter and the cavity has a direct relationship between the oil pressure, can be carried out within a certain range of non-polar adjustment, so that can effectively improve the efficiency of VC stick.
In the production of aluminum foil, the strip thickness will also be different, which requires a variety of control methods together, making Zhenggong rolling to change into a negative stick seam rolling, in this process also need to position control, pressure Control, pressure compensation control, AGC control.
In the aluminum foil production, the choice of different production processes, will also affect the mill production rate, combined with the actual production situation to analyze the main console to control, through the Ethernet to the AGC, and then transferred to the PLC, so that each drive system It will receive the signal command, and then normal operation. When setting the mill speed, it is necessary to use the main frame as the linear speed reference. Combine the diameter of the work roll with the reduction gear ratio of the gear box, and then calculate the speed reference value. In the wear when the speed and speed of production are inconsistent, are required in accordance with the principle of equal speed to speed in the form of distribution to the transmission system.
In the production of aluminum foil, winding tension calculation is also critical, which requires the motor shaft tension and the motor torque to calculate the electromagnetic torque, but also through the speed control device to obtain the pulse data, so you can ensure that the volume Take the tension of the data accurately. Modernized rolling mill has realized the automation control, carries out the variable programming in the whole process, the multiple systems are combined together, mainly including the drive string mouth application system, the computation control application system, the thickness and the flatness control application system, the optimized application system. These systems are through the data acquisition, real-time data server to control, first to the strip to calibrate the location. And then by the various parts of the system with each other, so the production of strip data for real-time control.