Tension analysis and influence of slitting machine
Publish Time: 2019-06-21
Visit: 774
The main function of the slitting machine is to divide a large-width roll film (aluminum film, plastic film, paper, etc.) into a machine of a small-diameter and small-width suitable coil. The slitting machine seems simple, but it is very complicated. The formation and control of tension during the slitting process is one of the keys to the quality of the finished product. Under normal circumstances, the speed of the vehicle is relatively fast, and the control accuracy is relatively high. Among them, the tension control is the core of its control. Tension control refers to the ability to permanently control the tension of a material as it is delivered on a device. This control must be effective for any speed of the machine, including acceleration, deceleration and constant speed of the machine. Even in the case of an emergency stop, there should be the ability to ensure that the cuts are not damaged. The stability of tension control is directly related to the quality of the slitting product. If the tension is insufficient, the raw material will drift during operation, and the finished paper will wrinkle after slitting and rewinding; if the tension is too large, the raw material will be easily broken, so that the finished paper breaks after slitting and rewinding. Factors that affect the stability of tension. The factors that cause fluctuations and changes in tension are often complicated, and the main influencing factors are as follows: First, the change of the speed of the machine will inevitably lead to changes in the tension of the whole machine. Second, the cutting machine in the process of receiving and unwinding, the winding and unwinding diameter is constantly changing, the diameter change will inevitably lead to changes in the material tension. When the unwinding torque is constant, the diameter is reduced and the tension is increased. The winding is reversed. If the winding torque is constant, the tension will decrease as the winding diameter increases. This is the main factor that causes the change in material tension during operation. Third, the change in the tightness of the raw material roll will also cause changes in the tension of the whole machine. Fourth, the unevenness of the material of the raw materials is cut. If the material elasticity fluctuates, the material thickness changes along the width and length direction, the mass of the material roll is eccentric, and the temperature and humidity changes in the production environment also affect the tension fluctuation of the whole machine. Fifth, the various transmission mechanisms (such as guide rollers, floating rollers, flattening rollers, etc.) of the slitting machine have factors such as imbalance and unstable air pressure.
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