Tension adjusting method for film splitting machine based on discrete PID and taper tension control

Abstract

The invention discloses a tension adjusting method for a film splitting machine based on discrete PID and taper tension control. The tension adjusting method comprises the following steps that S1, the real-time tension value F of a film is measured; S2, the real-time diameter D of a winding shaft is measured; S3, an optimal tension value F0 is obtained through a segmented taper tension model; S4, the torque of an unwinding shaft is controlled through a magnetic powder brake, so that the real-time tension value F of the film between the unwinding shaft and a traction shaft is adjusted to the optimal tension value F0; and S5, difference comparison is conducted on the real-time tension value F and the optimal tension value F0 to obtain a tension deviation value delta F, a tension deviation value delta F signal is transmitted into a discrete PID controller, and the torque of a winding motor is controlled through the discrete PID controller, so that the real-time tension value F of the film between the traction shaft and the winding shaft is adjusted to the optimal tension value F0. According to the method, tension control is stable, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of tension adjustment, and in particular relates to a film slitting machine tension adjustment method based on discrete PID and taper tension control. Background technique [0002] With the continuous development of handheld terminals and mobile devices, the requirements for high integration are getting higher and higher, and the requirements for device volume are getting smaller and smaller. High requirements are also placed on capacitors as the main components of the electronics industry. Among them, film capacitors are due to Its stability, non-polarity, and self-healing properties have become the mainstream products of capacitors in the electronics industry. The basis for the miniaturization of film capacitors lies in the miniaturization of its raw metallized films. In the development of small-sized products, the high-precision slitting machine becomes the key equipment, and the raw material metallized ...

AI Technical Summary

Problems solved by technology

At present, the domestic film capacitors are concentrated above 3.8 μm, and most of them are 4.8-6.8 μm film capacitors. This part of the market has already been saturated, while the film capacitors with a thickness below 2 μm are dominated by foreign countries, and the localization rate is extremely high. Low. The annual demand for this part of the product is about 20,000 tons. At present, there are only a few domestic companies that can produce it. They use a full set of imported equipment, and the annual production capacity is less than 1,000 tons. The quality is unstable and the yield is low. It is due to the inability to produce high-precision slitting machines that meet the slitting of film capacitors with a thickness below 2 μm

[0003] Starting from the overall function of the slitting machine, the whole equipment consists of three parts: uncoiling, slitting and winding. It mainly slits and rewinds the entire material metallized film longitudinally. Tension control is the most critical part of the whole equipment. Control technology, the radial stretching degree of the film during the winding process is the winding tension. If the tension is too high, it will easily cause material deformation, and in severe cases it will directly break; if the tension is too low, the winding process cannot be uniformly processed, and the production quality will decline; When the stability is lost, it is easy to cause the linear speed of the film to be affected, and the tightness will be different, resulting in more defective or waste products

That is to say, the stability of the tension control of the slitting machine determines the quality of the product after slitting, and the slitting machine of the prior art cannot meet this requirement

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