Running-in control method for steel collar and steel wire ring of ring spinning frame

Abstract

The invention relates to the technical field of textile, and discloses a ring spinning frame steel collar and steel wire ring running-in control method which comprises the following steps: controlling the spinning speed in a segmented manner in the spinning process, and performing speed reduction spinning according to the percentage of the segmented spinning speed in the steel collar and steel wire ring running-in period; the running-in frequency is converted into the doffing frequency according to the steel collar requirement; the speed reduction percentage can be set for running-in of the steel collar and the steel wire ring according to different doffing times, running-in is carried out from low to high, and after control over the running-in of the steel collar and the steel wire ring is finished, a normal spinning procedure is automatically carried out without manual participation. Through running-in control of the steel collar and the steel wire ring, speed reduction spinning according to percentage is achieved, the running-in time of the steel collar and the steel wire ring is converted into the doffing frequency according to the requirement of a steel collar specification, the whole running-in process of the steel collar and the steel wire ring is completed through one-time setting, and the normal spinning procedure is automatically recovered after the running-in process is finished. The running-in period is coherent and reasonable, and setting is simple.

Description

Technical Field

[0001] The invention relates to the field of textile technology, and in particular to a ring spinning machine steel ring and wire traveler running-in control method. Background Art

[0002] Ring spinning machines are commonly used in the textile industry. The steel ring and the wire ring are its key components, which undertake the important task of twisting and winding the yarn. The steel ring and the wire ring are a pair of friction pairs. The wire ring is buckled on the upper edge of the steel ring and rotates along the steel ring track with the yarn to complete the winding of the yarn on the bobbin. This process places strict requirements on the roundness, hardness, smoothness and wear resistance of the steel ring track. If the quality of the steel ring track does not meet the standards, it will seriously affect the yarn quality, especially the hairiness index, and may lead to an increase in the breakage rate, thereby reducing the yarn output.

[0003] In order to ensure a good match between the steel ring and the wire traveler, it is usually necessary to run-in the steel ring and the wire traveler at the beginning of the start-up or when changing the spinning variety. A well-run surface can not only extend the service life of the steel ring, but also significantly reduce the breakage rate combined with the high service life of the wire traveler. The running-in effect of the steel ring is not only directly related to its material and surface treatment process, but also affected by environmental factors such as temperature and humidity. The running-in process mainly involves selecting a suitable wire traveler according to the production variety, grinding the steel ring track through low-speed spinning to make its surface smooth and passivated. After the surface of the steel ring track is smooth and passivated, the production speed is increased to achieve the goals of efficient production, low breakage rate and less hairiness.

[0004] In the prior art, the running-in of the steel collar and the wire ring is usually based on the requirements of the steel collar instruction manual, and a lower running-in spinning speed is directly set, and the running time is manually controlled. When the running-in time reaches the requirement, it is manually adjusted to the normal spinning speed. However, the prior art has the following disadvantages: the running-in time needs to be manually controlled, the end of the running-in needs to be manually adjusted, and if the speed needs to be adjusted during the running-in period, it also relies on manual operation. Since the number of spinning equipment is large (for example, 50,000 spindles are usually equipped with about 50 units), the workload of adjusting parameters during the running-in of the steel collar and the wire ring is huge, the operation is cumbersome, and the reliance on manual operation is prone to affect the running-in effect due to negligence or omissions. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a ring spinning machine ring and wire traveler running-in control method to solve the technical problems pointed out in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted is as follows:

[0007] The ring spinning machine ring and wire traveler running-in control method comprises the following steps:

[0008] S1, set the normal segmented spinning speed;

[0009] S2. According to the running-in time requirements in the steel ring manual and in combination with the actual spinning process, the running-in time requirements of the steel ring and the steel traveler are converted into the number of running-in times N;

[0010] S2-1. Determine the running-in time t of the steel ring and wire traveler according to the recommendations in the instructions of different steel rings;

[0011] S2-2. Determine the spinning number T t , twist T, ring diameter D 1 , average tube diameter D 2 , calculate the yarn diameter d and the yarn section S;

[0012] The formula for calculating the yarn diameter is:

[0013] The calculation formula of yarn cross section is:

[0014] S2-3, set the spinning small stroke h 1 , the total lifting stroke H of the bobbin, calculate the bobbin length L, and the time t for spinning one bobbin 1 ;

[0015] Assume that the outer volume of a single tube of yarn is V and the actual volume of the yarn is V 实 , bobbin volume coefficient K;

[0016]

[0017] V 实 = k × V

[0018] Calculation of single tube yarn length:

[0019]

[0020] Set the normal average speed n of the spinning spindle and calculate the spinning line speed υ and single-bobbin spinning time t 1 ;

[0021]

[0022] S2-4, calculate the number of times N that the steel ring and the wire traveler are run-in;

[0023]

[0024] S3. Set a correction value for each doffing speed according to the number of running-in times N calculated in step 2.

[0025] As a further improvement of the present invention, in step S3, each doffing running-in speed correction value is set from low to high, and the spinning speeds of the yarn starting section and the yarn doffing section are not involved in the correction value calculation.

[0026] As a further improvement of the present invention, in step S3, different correction values ​​of each doffing running-in speed may be the same.

[0027] As a further improvement of the present invention, the wire rings used for different spinning times can be of different weights, with lighter wire rings being used first and heavier wire rings being used later.

[0028] As a further improvement of the present invention, during the running-in process, the spinning speed is dynamically adjusted according to the running-in number N and a preset correction value to ensure the running-in effect of the steel collar and the wire ring.

[0029] As a further improvement of the present invention, during the running-in process, the correction value of the spinning speed is gradually adjusted from low to high to ensure the running-in effect of the steel collar and the wire ring.

[0030] The beneficial effects of the present invention are:

[0031] The present invention realizes the spinning operation of the steel ring and the wire ring during the entire running-in period through one setting, and automatically adjusts to the normal spinning speed at the end of the running-in period, and runs the normal spinning program, which is more conducive to extending the service life of the steel ring and facilitating the normal performance of the steel ring. The present invention can accurately control the running-in process, ensure the running-in effect, shorten the running-in time, and improve production efficiency.

[0032] The present invention ensures that the surfaces of the steel collar and the wire ring are smooth and passivated through a reasonable running-in method, reduces friction loss, prolongs the service life of the steel collar and the wire ring, and reduces equipment maintenance costs.

[0033] The present invention ensures the consistency of each running-in process through automatic control, avoids human errors, and improves the stability of the running-in effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] The ring spinning machine ring traveler running-in control method comprises the following steps:

[0039] A textile factory newly installed a ring spinning machine. The steel ring is PG1-4054 ​​from a certain company. According to the instructions and requirements for the use of the steel ring, the steel ring should be run-in for 8-12 hours, and the wire ring should be replaced and run-in for another 12-24 hours.

[0040] The textile mill plans to produce pure cotton 40S, twist 1407

[0041] i) Determine the running-in time t of the steel ring and traveler according to the recommendations in the instructions of different steel rings;

[0042] ii) Determine the yarn number 14.58tex, twist 1074 twists / m, and ring diameter D 1 , average tube diameter D 2 , calculate the yarn diameter d and the yarn section S;

[0043] Yarn diameter

[0044] Yarn section

[0045] iii) Set the spinning stroke h 1 , the total lifting stroke H of the bobbin, calculate the bobbin length L, and the time t for spinning one bobbin 1

[0046] Calculation of single bobbin volume

[0047]

[0048] V 实 =91353×78.5%=71712

[0049] Calculation of single tube yarn length

[0050]

[0051] Set the normal average spinning spindle speed to 16000rpm and calculate the spinning line speed υ and single-bobbin spinning time t 1

[0052]

[0053] iiii) Calculate the number of times the steel ring and the wire traveler are run-in N

[0054]

[0055] Set the running-in procedure according to the ring and traveller running-in 9 times

[0056] The original spinning process is set up with nine curves from small yarn to full yarn.

[0057] S1, Normal spinning speed setting:

[0058]

[0059]

[0060] S2. Setting of the number of times the steel ring and the wire traveler are run-in:

[0061] The number of times the steel ring and the steel wire ring are run-in is set to: 9 times

[0062] The first wire ring is run-in with 3 doffings, and the second time the wire ring is changed, the yarn is run-in with 6 doffings.

[0063] S3, setting of correction value for running-in between steel ring and wire traveler:

[0064] Correction setting of spindle speed curve for ring and traveller running-in

[0065] Correction 1 85％ Correction 6 98％ Correction 2 90％ Correction 7 98％ Correction 3 90％ Correction 8 99％ Correction 4 95％ Correction 9 99％ Correction 5 95％

[0066] Note: The number of running-in times refers to the number of doffing times. When the number of running-in times is set to 1, the correction 1 setting value is used; when the number of running-in times is set to 2, the first doffing spinning speed uses the correction 1 setting value; the second doffing spinning speed uses the correction 2 setting value; and so on. In order to ensure that the yarn ends are retained during doffing, the L1 and L9 stages are not corrected.

[0067] Actual spinning speed during running-in period:

[0068] First doffing: Correction 1 spindle speed = spindle speed X85%

[0069] Spinning length Corrected 1 spindle speed rpm L1 400 11000 L2 500 12070 L3 600 12325 L4 700 12750 L5 800 13175 L6 3400 13600 L7 3450 13175 L8 3500 12750 L9 3600 9000

[0070] (No need to fill in this table, it will be calculated automatically)

[0071] Second doffing: Correction 2 spindle speed = spindle speed X90%

[0072]

[0073]

[0074] (No need to fill in this table, it will be calculated automatically)

[0075] The third doffing: Correction 3 spindle speed = spindle speed X95%

[0076] And so on...

[0077] In step S2, spinning starts, first spinning is performed according to the running-in wire ring operation program, and after the running-in is completed, it automatically enters the S1 normal spinning program.

[0078] The correction value of each doffing running-in speed is set from low to high, and the spinning speed of the yarn starting section and the yarn doffing section does not participate in the correction value calculation.

[0079] Different correction values ​​of each doffing running-in speed can be the same.

[0080] The wire rings used for different spinning times can be of different weights, with lighter wire rings used first and heavier wire rings used later.

[0081] During the running-in process, the spinning speed is dynamically adjusted according to the running-in number N and the preset correction value.

[0082] During the running-in process, the correction value of the spinning speed is gradually adjusted from low to high.

[0083] The present invention significantly improves the production efficiency, yarn quality and equipment service life of the ring spinning frame through an automated and intelligent running-in control method, while reducing manual operation costs and energy consumption, and has broad application prospects and significant economic benefits.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, component splitting or combination, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. This solution can also be used to change the spinning variety and run-in the steel ring and wire traveler.

Claims

1. A ring spinning machine ring and wire traveler running-in control method, characterized in that: The following steps are involved: S1, set the normal segmented spinning speed; S2. According to the running-in time requirements in the steel ring manual and in combination with the actual spinning process, the running-in time requirements of the steel ring and the steel traveler are converted into the number of running-in times N; S2-1. Determine the running-in time t of the steel ring and wire traveler according to the recommendations in the instructions of different steel rings; S2-2. Determine the spinning number T t , twist T, ring diameter D1, average tube diameter D2, calculated yarn diameter d, yarn section S; The formula for calculating the yarn diameter is: The calculation formula of yarn cross section is: S2-3, set the spinning stroke h1, the total bobbin lifting stroke H, calculate the bobbin length L, and the time t1 for spinning one bobbin; Assume that the outer volume of a single tube of yarn is V and the actual volume of the yarn is V 实 , bobbin volume coefficient K; In 实 =k×V Calculation of single tube yarn length: Set the normal average speed n of the spinning spindle and calculate the spinning line speed υ and single-bobbin spinning time t1; S2-4, calculate the number of times N that the steel ring and the wire traveler are run-in; S3. Set a correction value for each doffing speed according to the number of running-in times N calculated in step 2.

2. The ring spinning frame ring and wire traveler running-in control method according to claim 1, characterized in that: In step S3, each doffing running-in speed correction value is set from low to high, and the spinning speeds of the yarn starting section and the yarn doffing section are not involved in the correction value calculation.

3. The ring spinning frame ring and wire traveler running-in control method according to claim 1, characterized in that: In step S3, different correction values ​​of the running-in speed for each doffing may be the same.

4. The ring spinning frame ring and wire traveler running-in control method according to claim 1, characterized in that: The wire rings used for different spinning times can be of different weights, with lighter wire rings used first and heavier wire rings used later.

5. The ring spinning frame ring and wire traveler running-in control method according to claim 1, characterized in that: During the running-in process, the spinning speed is dynamically adjusted according to the running-in number N and the preset correction value.

6. The ring spinning frame ring and wire traveler running-in control method according to claim 1, characterized in that: During the running-in process, the correction value of the spinning speed is gradually adjusted from low to high.

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