Control method and device for reducing broken ends of yarns of spinning frame

Abstract

The invention discloses a control method for reducing broken ends of yarns of a spinning frame. The control method comprises a starting step, a small yarn spinning step, a medium yarn spinning step, a large yarn spinning step and a doffing step, wherein in the starting step, a fan is started, at the same time, a ring rail goes upwards to a spinning beginning position, and then continues going upwards from the spinning beginning position; the ring rail goes upwards to a proper spinning position, and then a main motor begins to run at a low speed; the ring rail goes downwards from the proper spinning position to the spinning beginning position, and then the ring rail runs at a low speed for spinning; if the running time is equal to Pd, the medium yarning spinning step is performed; firstly, the ring rail goes upwards to the proper spinning position, then the ring rail goes downwards from the proper spinning position to the spinning beginning position, an air ring can be opened in time, the wave length of the air ring is shortened, the yarn tension is reduced, and the end breakage rate of the yarns is substantially reduced when small yarns are spun; a ring rail motor can be protected, the running time of the ring rail motor can be set for 5 seconds since the fan is started, and if a sensor at the spinning beginning position malfunctions, the ring rail motor stops after going upwards for at most 5 seconds.

Description

[0001] The present invention is a divisional application with the application number 2013100334192, the filing date of January 29, 2013, and the title of the invention "control method and device for reducing yarn breakage of spinning frame". Technical field [0002] The invention relates to a method for controlling the spinning process of a spinning frame, which is suitable for a spinning frame, in particular to a control method and a device for reducing yarn breakage of the spinning frame, and belongs to the technical field of textiles. Background technique [0003] In the textile industry, the spinning frame is usually used for spinning on the bobbin 1, and reducing the rate of end breakage of the spinning frame during spinning is the goal that the industry has been pursuing. Traditional equipment still in use on the market, such as FA502, FA503 and A513, mainly use AC contactors to control the spinning process of the entire spinning frame. This control method is difficult to ach...

AI Technical Summary

Problems solved by technology

Traditional equipment still in use in the market, such as FA502, FA503 and A513, etc., mainly use AC contactors to control the spinning process of the entire spinning frame. control

In order to reduce the yarn breakage rate of the spinning frame, at present, frequency converters are generally used to control the realization. However, due to the large number of old spinning frames mentioned above in the textile industry, these spinning frames are transformed. The frequency converter of each device is combined with the The cost of PLC is nearly 10,000 yuan. It is very difficult for many textile enterprises using old equipment to realize this method of control, which affects the product quality and output of these enterprises.

On the other hand, flying flowers are easy to block the heat dissipation system of the frequency converter, which is the disadvantage of the old type of spinning frame controlled by the frequency converter, and it is also the main reason that the frequency converter is easy to burn out or even cause a fire after being used for a long time

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