Maintenance And Maintenance Of Drawing Frame

　　 Method 1

Regularly check roller bearing status to reduce mechanical wave generation.

Shaanxi eight party Textile Co., Ltd. He Mei

The rough process is Spinning enterprise One of the key processes to control and stabilize the quality of semi-finished products is the importance of its mechanical wave to the subsequent process and even the quality of cloth. Therefore, equipment inspection and strict control must be strengthened. We analyzed and processed the causes of mechanical waves at 13 cm to 15 cm and 78 cm to 80 cm on the cotton strip spectrogram of the FA317 drawing frame, so that the CV value of the bar sliver was obviously improved.

The mechanical wave is reflected in the spectrogram, that is, the "chimney", generally occupying a channel, and when the frequency of the mechanical wave is between two adjacent channels, the two adjacent channels will be touched. So, two adjacent channels are occupied on the spectrogram. In some cases, because of the slight fluctuation of the periodically fluctuating channels, the stack will occupy 3 or 4 channels. Mechanical waves have inherent wavelengths and harmonic waves. Therefore, only the fundamental wave analysis is the most accurate.

In order to prevent the occurrence of mechanical waves, it is necessary to regularly check the bearing state of rollers, check the wear of shaft and hole, the loosening of key and keyway, the wear and shape of gear tooth tip, the periodic inspection of the bearing's sloshing, and regularly fuel the bearing parts to ensure that there is no shortage of oil or damage. Regularly inspect the belt's elastic state of the transmission roller, clean up the dirt in the gear backlash in time, and find that the gear's mesh is bad or worn.

In the specific work, we should regularly check the lubrication state of rollers, correct the bending Lola, regularly lubricate and clean the axle sleeves, and correct the cots, and prevent drafting mechanical waves caused by the poor operation of the axle sleeves and cots. To strengthen the inspection of the transmission belt, we need to avoid wear and tightness of the toothed belts. When changing the varieties, we should check the cots to ensure the roughness and straightness of the surfaces; strictly inspect the drafting passages during the shift, and guard against the beating of the axle sleeves and cots.

　　 Method two

Maintain Key equipment Play the role of self leveling

Shaanxi Baocheng Aviation Precision Manufacturing Limited by Share Ltd Chao Songshan

The FP sensor is installed at the bell mouth detection device of the FA322B high-speed drawing frame. It belongs to the precision measuring mechanism. When cleaning and dealing with the blockage fault, it will scratch and damage it if it is careless, resulting in the inaccurate detection signal or the frequent alarm of the quality monitoring system, which affects the driving efficiency. Therefore, special tools are used for dismantling and cleaning, and it is strictly prohibited to strike or strike with hard objects.

We should ensure that the gas source supplied to the FP sensor is oil-free, free from impurities and dry. However, some users do not pay much attention to this. The use of the old air compressor causes oil pollution in the gas source, causing short circuit of the bridge circuit in the FP sensor, and ultimately leading to no use.

The T/G roller device is mainly responsible for detecting the coarse and fine signal of cotton sliver. If cleaning is not done regularly, the cotton will be circled to the groove of the concave convex roller, and the cotton will gather more and more after a long time. Finally, the signal given by the displacement sensor is biased, which affects the leveling effect of the whole machine.

Encrypt the operation panel is to prevent unauthorized operation of unrelated personnel. Some users are not strict with password management, causing many people to operate arbitrarily, resulting in disorder of the leveling system and producing waste sliver. In addition, it is necessary to develop timely cleaning of cotton waste in the suction box, regular refueling of high speed rotating machinery parts, and timely replacement of oil in gear boxes, which is a good habit for timely cleaning of frequency channels and fans.

With the development of spinning technology toward high speed, large volume, short flow direction, and the continuous improvement of market quality requirements for yarn and fabric, the high-speed drawing frame with self-adjusting device has been welcomed by more and more cotton textile enterprises. It has been proved by practice that the merging process of FA322B high speed self levelling drawing frame has shortened the spinning process, guaranteed the quality of spinning, reduced the cost of labor, and improved the over ripening of yarns.

　 Method three

Attention to parameter setting to ensure dynamic closed-loop monitoring

Shandong Jiang Zhengjun Yunlong Textile Machinery Co., Ltd., Yuan Xianzheng, Jiang Zhengjun

FA387 machine is a kind of digital high speed. Drawing frame Through the human-machine interface, the parameters such as drafting speed, fixed length and so on can be set up. At the same time, the main drafting ratio is precisely set and the dynamic closed-loop monitoring is carried out.

Enter "system menu", select "parameter settings", and automatically enter the basic "parameter settings" screen after entering the password. According to the process, the bar speed, low speed, cylinder length, low speed length, air suction delay and speed ratio are respectively set. The speed is usually 200 m / min to 500 m / min, the low speed is 100 m / min to 200 m / min, and the barrel length can be set according to the size of the cylinder. The low speed length is usually 50 meters to 200 meters, so that the yarn will be contacted with the upper coil after the contact. The suction delay is set from 3 seconds to 10 seconds. The speed ratio is set to 0.8 to 1.2, usually 1 (because the speed is adjusted by frequency conversion, when the power frequency fluctuates, the actual output speed is not consistent with the setting speed, and the speed setting value can be adjusted to match the actual output value by adjusting the speed ratio.

In the touchscreen's "design back area drafting C" item, select the "back zone draft synchronous belt pulley", the machine will automatically calculate the drawing area K34 of the back zone. At the same time, manual replacement of synchronous pulley should be consistent with the settings of the touch screen. The machine is equipped with 13 different timing pulleys with different specifications, corresponding to 1.1 times to 2.04 times the draft area.

After setting up, after testing the weight and the evenness of the cotton sliver, it is necessary to select "join" in the "closed loop control" of the touch screen. In this way, the drawing ratio between the rollers and the four rollers is in the monitoring state. When the drawing ratio exceeds 0.01 times of the design drafting ratio, the machine will stop in time to ensure that the quality stability of the cotton sliver produced under abnormal voltage conditions is guaranteed. Finally, the "cover switch" option is selected to "close" to ensure the safety of the vehicle after driving.