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The restrictive factors in the process of using ring and ring

As the unit production level of spinning process is a comprehensive assessment index to measure the production technology management level of enterprises, the matching use of rings and wire rings, as well as their operation performance, directly affect the single yarn hairiness and yarn breakage rate, directly affect the yarn quality and production level of spinning process; therefore, only the wire rings with good performance can be used Only when the ring with good performance rotates stably, can the requirements of high-speed and large volume loading be realized, the yarn hairiness be reduced, and the yarn breakage be reduced.

In the matching use of ring and ring, the ring is the smallest textile equipment in twisting and winding, but its function cannot be ignored. This is because under the same conditions of other processing conditions, by adjusting the steel ring, it can stabilize the air ring shape, control the spinning tension, reduce the breakage rate and stabilize the production.

The key factors that restrict their use are as follows: ① wear; ② maturity; ③ lubrication performance.

abrasion

According to the observation and analysis of wear conditions of different rings and rings in use, the main factors restricting the wear resistance of rings and rings are material selection, geometry and manufacturing process; secondly, the rotation speed of the rings and the size of the contact surface between the rings; in addition, the adjustable accuracy of the spinning frame itself, that is, the influence of the performance of the spinning frame.

To understand the wear rule of steel ring, it is necessary to operate for at least one year. Sometimes, due to other factors, yarn breakage increases. Although the production returns to normal after adjustment of process, air conditioning, steel ring and other aspects, the wear degree of steel ring has greatly increased. In serious cases, it is necessary to replace the steel ring, resulting in unnecessary waste.

Therefore, in the daily use of steel ring and steel ring, the following points should be achieved:

First of all, it is necessary to select the ring and check it well, so as to ensure that the wear degree in the regrinding cycle can be effectively controlled and the normal production and yarn quality can be maintained.

Secondly, it is necessary to keep the car in good condition, put an end to the same use of rings in different periods, and create conditions for the use of rings in terms of air conditioning, maintenance and other aspects. Because the wear condition of the ring is affected by the "three verticals and one center" on the equipment and the temperature and humidity of the production environment besides the selection of the steel ring.

In addition, it is also an essential link to be responsible for the tracking and observation of supporting management personnel on the train, especially when using the fourth cycle steel ring, to master the operation of the ring and steel ring in time and strictly implement the regrinding cycle.

Maturity stage

Generally, rings and rings should be treated to improve their surface condition and running performance, reduce wear, shorten running time, prolong service life, and meet the requirements of high speed and low head breakage. Compared with the maturity of the ring, the maturity of the ring is more critical. Because the service cycle of the ring is much longer than that of the ring, so the potential impact on the production and quality of the spinning is much greater, especially in the mature period of the new ring, that is, before it runs out of the normal runway, it is a period of sharp increase in the wear of the ring, and also a dangerous period of rapid decline of the ring.

In the process of using high-speed ring, if new batch number ring is used, it is found that the ring used for normal spinning has a long maturity, heavy lifting head, high breaking rate, obvious discoloration of the worn position of the ring, and many flying rings; while the ring of the same batch number can be used on the old batch number new ring for normal start-up and smooth operation; this is caused by the extension of maturity period due to the inherent quality of the ring After applying some salad oil or Vaseline on the steel collar, the lifting head becomes lighter and the broken head is obviously reduced. After a period of operation, it returns to normal.

Lubrication performance

As the friction pair of steel ring and steel ring is running at high speed, high pressure, high temperature and without grease, it can be said that they are rotating sliding under the condition of approximate dry friction; therefore, the lubrication performance between them directly affects the stability of the operation of the steel ring and the service life of the steel ring and steel ring, especially the steel ring with a service life of about one week.

High speed is an important mark of modern ring spinning technology. Shorten and simplify the running process of rings, especially new rings, so that a layer of lubricating film will be formed after the rings run for a short time, so as to stabilize and reduce the friction coefficient between rings and rings at high speed. It is to meet the requirements of high speed, reduce or prevent the "hot wedge" phenomenon caused by dry friction between metal and metal during high speed running, and prevent spinning In fact, the purpose of the above example is to apply a little salad oil or vaseline, but also to reduce the high friction factor during the ripening period and before the formation of the lubricating film.

It is generally believed that the "lubricant" in the matching of rings and rings is the "lubricating film" mentioned above. When other processes are properly selected, its forming time and quality will directly affect the other two restricting factors in the matching use of rings and rings, i.e. maturity and wear resistance.