CN1005856B - Method of controlling spinning machine and apparatus for perporming this method - Google Patents
Method of controlling spinning machine and apparatus for perporming this method Download PDFInfo
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- CN1005856B CN1005856B CN86105942.5A CN86105942A CN1005856B CN 1005856 B CN1005856 B CN 1005856B CN 86105942 A CN86105942 A CN 86105942A CN 1005856 B CN1005856 B CN 1005856B
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Abstract
The present invention relates to a method for controlling a spinning machine to optimize the speed of the machine by controlling a yarn delivery rate and stabilizing a yarn breakage rate per length of delivered yarn. A device used by the method comprises a yarn delivery rate sensor (1) and an operation spindle number sensor (3) which are connected with an optimization unit (5), wherein the output end of the optimization unit (5) is connected with a variable-speed driver (6) of a spindle and a variable-speed driver (18) of a drafting device; the output end of a spindle rotation number sensor (8) is connected with a unit (10) for computing the preset number for yarn breakages, the other end of the unit (10) is connected to the yarn delivery rate sensor (1); the output end of the unit (10) is connected with the variable-speed driver (18) of a drafting device through a comparison element (11), gates (13, 14) and a mismatch follow-up unit (12).
Description
The present invention relates to textile industry, especially relate to the method for controlling spinning machine and the device that can implement this method.
The most effective Application Areas of the present invention is the process of spinning linen fibre that is controlled on ring spinner or the Speed frames.
Another possible Application Areas of the present invention is control twisting machine or Speed frames.
Present spinning process must have the operator to participate in directly, is responsible for the operation of basic eliminating broken yarn, otherwise, process will be interrupted, therefore, as broken yarn rate λ with get rid of when having certain acceptable balance between the broken yarn intensity μ, suppose that process can normally carry out.The balance of selected λ and μ value or ratio have been determined the technology and the economic evaluation of process.Yet, because the randomness of these two variablees and be complicated to this selection of unstability of time.
As everyone knows, broken yarn rate λ changes in time and in the scope of space (from a machine to another).This is caused by material performance instability, semi-finished product crudy and appointed condition.On the other hand, the working strength that the operator nurses a machine is also unstable, at first depends on the technical ability of each operator when nurse, the degree of fatigue in their course of work, and different healths and mental health state.Therefore, by regulating the speed of spinning machine operation continuously, make it to adapt to the bar kind condition of spinning process.Operator's health and mental health state prevent the undesirable consequence that broken yarn rate and the unstability of getting rid of broken yarn intensity cause.This can realize by the system that adopts automatic control spinning machine mode of operation, these systems remove broken yarn intensity by actual production, broken yarn rate and actual row that the various speed of operator's set device are monitored spinning machine, make equipment provide peak performance under specified criteria.
The method and apparatus of the automatic control loop ingot spinning machine operation state of having known can compensate the unstability of broken yarn rate and eliminating broken yarn intensity, thereby raise labour productivity and equipment yield.
For example, the method and apparatus of a kind of automatic control spinning machine of having known is (referring to FR patent No.1,516,876, Inf, Cl, GO7C; 1968), on ring spinner, provide stable broken yarn rate.This method is to measure actual broken yarn rate, compares and measures value and preset value, changes the speed state of machine when two values do not match.When actual broken yarn rate surpassed preset value, machine slowed down; When actual end breakage rate was lower than preset value, speed increased.
And then know that also a kind of method and apparatus of spinning machine of controlling is (referring to Soviet Union inventor certificate No.438,734; Inf, Cl
2DO1H1/26; 1974).Increase machine production to greatest extent.This method is that monitoring is advanced yarn speed and doff coefficient in the predetermined information gathering phase, utilizes these data to determine the output of machine.Then, the output of determining like this has output to compare with the previous information gathering phase; What change yarn feeds speed, the output of the value increase/minimizing machine that is directly proportional with the mismatch of the output measured with two continuous information gathering phases.
The device of realizing this method comprises an empty ingot sensor, an electronic control circuit and a speed change driver.Electronic control circuit comprises a total counter, time set and one have and totalize (just number), example the comparing unit of number and forward-backward counter, the input of total counter and empty ingot sensing connector, its output links to each other with time set, and time set links to each other with the input of the forward-backward counter of comparing unit, and its output links to each other with speed change driver.
Also know a kind of method of controlling spinning machine, comprise the amount of utilizing the empty ingot of a sensor monitoring, feed speed with what certain functional relation of empty number of spindles changed spinning machine.
The device of realizing this method has comprised the ingot sensor, and its output is connected with a memory, and this memory is connected with a control module by a master oscillator, and control module links to each other with a delay element with a time set.(referring to Soviet Union inventor certificate No.478,898, InfCl
2DO1H1/26,1974).
The shortcoming of above-mentioned two kinds of technical solutions is when advancing the yarn velocity variations, and the twist yarn value changes in the 10-15% of rated value scope too.Therefore, if broken yarn rate or eliminating broken yarn Strength Changes are bigger, the difference of twist yarn value and rated value is easy to reach the limiting value of the variation that can allow, and can not control this value more like this.The dynamic control of machine operation situation in this case, is subjected to obviously influence or basic the inefficacy.
With the immediate prior art of this method be a kind of method of controlling spinning machine, comprise the output and the speed of measurement machine at that time, calculate velocity amplitude corresponding to the machine of the maximum output value, set the speed of machine according to the value that obtains like this.
The device of realizing this method comprises that one is advanced yarn velocity sensor and a spinning machine work number of spindles sensor, their outputs separately are connected to the input of a multiplier unit, the multiplier unit is connected with a highest optimizating unit, and highest optimizating unit be connected with the how fast driver of spinning machine (referring to SU Soviet Union inventor certificate No.438,734; Inf, Cl
2, DOIH1/26; 1975).
The shortcoming of a kind of method and apparatus in back is to control (rated value ± 10%) by predetermined arbitrary control channel effectively, promptly advance yarn speed and (finish control action and machine speed (speed by synchronously changing drafting system and the revolution of spindle keep ratio predetermined between the two-value to realize simultaneously) by the speed that changes drafting system; And the excursion of control action is limited.Therefore, obviously change if broken yarn rate and operator nurse the ability of machine, control action reaches its maximum, and control procedure lost efficacy before a value corresponding with the maximum that is lower than control action is reduced in disturbance.Controlling depth that this is restricted or degree have influenced the validity of device.Simultaneously, utilize yarn feeding speed as control channel, in some cases, not only having solved increases the problem of equipment yield, and has solved the problem that improves the quality of yarn.This is because the variation of broken yarn rate and connected with the deviation of best twist yarn value.Cause that the variation of the parameter of the yarn that the broken yarn rate changes can be to a certain extent compensated by the variation as the corresponding twist yarn value of broken yarn rate function.Yet, also cause the variation of output because the operator nurses the difference of machine capability, as consider behaviour person fatigue or technical ability deficiency gradually.Like this, be the function of two kinds of interference owing to advance the control of yarn rate, the effect that improves the quality of yarn may be weakened, in some cases, broken yarn rate constant (λ=constant) and when getting rid of broken yarn capacity variation (μ=variable), this effect may be opposite fully, the quality of producing yarn is poorer.
Therefore, in order to strengthen the quality of yarn, control the yarn transfer rate that becomes broken yarn rate function separately.
The objective of the invention is to set up a kind of device of controlling the method for spinning machine and realizing this method, it will be to adjusting as the yarn transfer rate of broken yarn rate function, and the speed of controlling machine simultaneously makes the production of spinning machines maximum.
This purpose is the method by a control spinning machine, comprises measuring output and machine speed at that time, calculates the machine speed value corresponding to maximum production, and obtain according to this value setting machine speed.According to the present invention, this method also be included in gather above-mentioned information during the broken yarn rate of measurement unit's yarn delivered length, determine the broken yarn rate that presets by following formula:
Wherein λ is the broken yarn rate of unit yarn delivered length;
λ
nBroken yarn rate for unit yarn delivered length under the condition of the specified turns of spindle and the specified twist;
ω is the rotating speed of spindle;
1≤α≤2nd is by relational expression λ=f(ω) yarn that each grade is produced is predetermined, actual broken yarn rate and preset value determine symbol and obtain preset value and actual value between mismatch signal, compare the absolute value of mismatch and the mismatch value of permission, when the mismatch value of reality surpassed the mismatch value that allows, the yarn feeding rate that changes machine reduced the mismatch value that produced to O.
The device of realizing this control spinning machine method comprises a yarn feeding rate sensor and a spinning machine work number of spindles sensor, make their outputs separately be connected to a multiplier unit, the multiplier unit links to each other with a highest optimizating unit, and highest optimizating unit is connected with the speed change driver of spindle and drafting system again.According to the present invention, also comprise a unit that calculates the broken yarn number, it links to each other with the output of work number of spindles sensor, and itself output is connected to the input of a storage, memory links to each other with an input of the comparing element that a dead band is arranged, another input of comparing element is connected to and is used to calculate broken yarn and presets counting unit, and this unit has an input to connect the output that spindle of spinning machine speed probe and its another input are connected to yarn rate sensor.The output of comparing element is criticized AND gate by a circuit return-to-zero of first grade AND gate and mismatch tracking cell unit with the second level and is connected, the output that AND gate is criticized in the second level is connected to memory, another output is connected to the calculating broken yarn and presets counting unit, the input of second level AND gate is connected to the output of a feedback unit, and feedback unit is connected with the mismatch tracking cell.The mismatch tracking cell is connected with the speed change driver of the drafting system of spinning machine, the output of circuit return-to-zero unit be connected to one fiducial time element, memory and calculate broken yarn and preset counting unit.
A major advantage of the present invention is, the control of productivity ratio realizes by the yarn feed speed passage by entire machine speed passage and part, but yarn feeding speed is separately as the function of broken yarn rate and change, and this means does not have other factors can influence twist yarn except the broken yarn rate.This can increase the physical and mechanical property of yarn, improves the grade of yarn afterwards in the operation and reduces the broken yarn rate.
Owing to introduce the additional control loop relevant with yarn feed speed, the method for announcing is summarized the validity that has increased system in fact here, has enlarged control range.
Because yarn feeding speed is controlled as the function of broken yarn rate separately; Make the correction twist yarn become possibility.
First control loop-be the loop of associated machine speed, make as the machine operation speed optimization of broken yarn rate with the function of getting rid of broken yarn (ability), this has just crossed the intrinsic obstacle of spinning machine operation.
Second control loop of associated machine yarn feeding rate can change twist yarn, so that the broken yarn rate maintains on the predeterminated level, thus the physical property of stable yarn.The weak part of so easy broken yarn is twisted, and the enhancing position of isochrone is gently twisted with the fingers.This is with regard to the inhomogeneities of the TENSILE STRENGTH that reduced yarn and improved its mean value.
Because all speed of machine are subjected to the successive control effect for each machine speed, it is vital selecting to preset broken yarn rate value according to raw material quality, and this value is determined by following formula:
Other purpose of the present invention and advantage can obviously be found out with reference to accompanying drawing by the detailed description of following embodiment.
Accompanying drawing is the block diagram of the device of enforcement the inventive method.
The method of control spinning machine comprises measures the existing yield values and the speed of machine, calculates the machine speed value corresponding to peak performance then.Therefore value is used to set the speed of spinning machine.The unit length broken yarn rate of yarn feeding is determined by following formula in during collecting above-mentioned information
Wherein λ is the unit length broken yarn rate of yarn;
λ
nIt is the unit length broken yarn rate of yarn when specified turns of spindle and sth. made by twisting complex value;
ω is spindle rotating speed (revolution)
1＜α＜2nd, by the kind decision of the yarn of making;
The actual broken yarn rate of Que Dinging and preset symbol and the signal that broken yarn rate value relatively obtains mismatch between two values like this, then mismatch absolute value and permissible value are compared, when mismatch value surpasses permissible value, change machine yarn feeding rate this mismatch is reduced to zero.
As shown in drawings, the device of control spinning process comprises: the yarn feeding rate sensor 1 of spinning machine 2, work number of spindles sensor 3, multiplier unit 4, machine speed highest optimizating unit 5, the variable spindle speed driver 6 of machine 2, the unit 7 of calculating broken yarn number, spindle rotating speed (revolution) sensor 8, memory 9 calculates broken yarn preset number unit 10, and the comparing element 11 in a dead band is arranged, mismatch tracing unit 12, AND gate 13,14,15,16, feedback unit 17, the speed change driver 18 of the drafting system of machine 2, element fiducial time (master timer) 19, circuit return-to-zero unit 20.
The sensor 1 of yarn feeding rate and spinning machine work number of spindles sensor 3 are connected to the input of multiplier unit 4, multiplier unit 4 is connected with highest optimizating unit 5, and highest optimizating unit 5 is connected with the variable spindle speed driver 6 of spinning machine 2 and the speed change driver 18 of drafting system again.The output of work number of spindles sensor 3 is connected to and calculates broken yarn number unit 7, the output that calculates broken yarn number unit 7 is connected to the input of memory 9, memory 9 is connected with an input of the comparing element 11 that a dead band is arranged, what be connected with another input of comparing element 11 is to calculate to preset broken yarn counting unit 10, an input of unit 10 is connected to the speed probe 8 of spinning machine 2, and another input is connected to the output of yarn rate sensor 1.The output of comparing element 11 is connected with mismatch tracking cell 12, circuit return-to-zero unit 20 and AND gate 15,16 with 14 by corresponding AND gate 13, have an output to be connected to memory 9 in the AND gate 15 and 16, and another output is connected to and calculate broken yarn and preset counting unit 10.Other input of AND gate 15,16 is connected to the output of feedback unit 17, and feedback unit 17 is connected to mismatch tracking cell 12, and unit 12 is connected to the speed change driver 18 of the drafting system of spinning machine 2.The output of circuit return-to-zero unit 20 is connected to element 19 memories 9 and calculate the broken yarn rate and preset counting unit 10 fiducial time.
The operation of said apparatus that is used for implementing this method is as follows:
The work number of spindles sensor 3 of yarn feeding rate sensor 1 and spinning machine 2 is imported multiplier unit 4 to information separately, makes that the practical productivity of machine 2 can be determined in unit 4 by amplifying the data of reception:
P＝V·N。
Wherein N is the work number of spindle unit;
V is the yarn rate.
The information of the actual production of machine 2 input highest optimizating unit 5, unit 5 calculates the real variable of process, and promptly broken yarn rate and get rid of broken yarn intensity determines to keep the speed of machine peak performance.Highest optimizating unit 5 provides the optimum speed through calculate of instruction with the speed change driver 18 of setting sub-speed change driver 6 and drafting system.Driver 6 and 18 is the speed that changes under the condition of predetermined ratio (V/ ω=constant) separately, and this just is provided with the corresponding speed of machine 2.The information of work number of spindle unit is given to the unit 7 that calculates the broken yarn number, and the broken yarn number that occurs between two continuity points of unit 7 spindles is calculated.The numerical value that obtains like this is given to the memory 9 of the total broken end number that occurs during the time " T " of having stored the collection information that is preset by element fiducial time (master timer) 19.Turns of spindle sensor 8 is given to the information of spindle actual speed and calculates the unit 10 that broken yarn presets, and determines to preset broken yarn number " n " according to following formula in the information gathering time " T "
Memory 9 and calculate broken yarn and preset information that counting unit 10 provides them to comparing element 11.If detecting mismatch (mistake), comparing element 11 surpasses its dead band, symbol according to mismatch, on its corresponding output, form " 1 " signal (current potential), it collects end of term excitation mismatch tracking cell 12 by corresponding AND gate 13 or 14 in information, fiducial time, element 19 provided permission " 1 " so signal to the speed change driver 18 of other input mismatch tracking cell 12 control drafting systems of AND gate 13 and 14, changes the yarn rate according to mismatched character when the Information Monitoring phase finishes.Simultaneously, because the excitation of speed change driver 18, feedback unit 17 provides a series of frequency stabilization signals from its output.This a series of signal is by one of AND gate 15,16 of opening according to mismatched character or enter memory 9, or enters and calculate broken yarn and give and put counting unit 10, and the pulse of a series of signal here is added on the numerical value that deposits in the unit 10.
In case mismatch drops to value in comparing element 11 dead bands, comparing element 11 forms " 0 " signal at its output.When the output of unit 11 when " 1 " changes to " 0 ", 20 responses of circuit return-to-zero unit, its output signal makes element 19 fiducial time, memory 9 and calculating preset broken yarn counting unit 10 to restore.
The excitation of above-mentioned feedback unit 17 guarantees that the yarn rate changes with the value that is proportional to the accumulation mismatch.
In the time will making the Change of Class of yarn, corresponding feedback factor is preset at feedback unit 17, presets " α " value in the counting unit 10 just as calculating broken yarn, and is the same with the working time " T " of information collection phase in the fiducial time element 19.
Claims (9)
1, a kind of method of controlling spinning machine, comprise machine output and the speed at that time of measuring, calculating is corresponding to the machine speed value of peak performance, and set the speed of machine according to the value that obtains like this, its feature also comprises, in during the above-mentioned information of collection, measure the unit length broken yarn rate of yarn, from formula
Determine to preset the broken yarn rate, wherein
λ is the unit length broken yarn rate of yarn,
λ n is the unit length broken yarn rate when the specified turns of spindle and the specified twist,
ω is the revolution (rotating speed) of spindle
1＜α＜2nd is from relational expression λ=f(ω) according to each grade predetermination of the yarn that will produce.
Actual broken yarn rate and preset value with the symbol determined and obtain preset value and actual value between mismatch signal, compare mismatch value and allow mismatch value, when actual mismatch value surpassed permissible value, the yarn rate that changes machine made the mismatch value that has produced be reduced to zero.
2, one device of implementing the described method of claim 1 comprises the work number of spindles sensor 3 of a yarn feeding rate sensor 1 and spinning machine 2, their outputs separately are connected to multiplier unit 4, multiplier unit 4 is connected to highest optimizating unit 5, highest optimizating unit 5 is connected to the speed change driver 18 of the drafting system of the speed change driver 6 of spindle and spinning machine 2 successively, it is characterized in that, it comprises that is also calculated a broken yarn counting unit 7, the output that calculating broken yarn counting unit 7 is connected to the output unit 7 of work number of spindles sensor 3 is connected with the input of memory 9, memory 9 has an input of the comparing element 11 in a dead band to be connected with one, another input of comparing element 11 is connected to calculate and presets broken yarn counting unit 10, an input of unit 10 is connected to the spindle speed sensor 8 of spinning machine 2, and another input is connected to yarn rate sensor 1, the output of comparing element 11 is by corresponding first order AND gate 13,14 with mismatch tracking cell 12, circuit return-to-zero unit 20 and second batch of AND gate 15,16 are connected, one of them output of 15 of second level AND gate is connected to memory 9, and another output of 16 of second level AND gate is connected to calculate and presets broken yarn counting unit 10, second level AND gate 15,16 input is connected to the output of feedback unit 17, feedback unit 17 is connected to mismatch tracking cell 12, mismatch tracking cell 12 is connected to the speed change driver 18 of the drafting system of spinning machine 2, the output of circuit return-to-zero unit 20 is connected to element 19 fiducial time, and broken yarn counting unit 10 is preset in memory 9 and calculating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86105942.5A CN1005856B (en) | 1986-09-03 | 1986-09-03 | Method of controlling spinning machine and apparatus for perporming this method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86105942.5A CN1005856B (en) | 1986-09-03 | 1986-09-03 | Method of controlling spinning machine and apparatus for perporming this method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86105942A CN86105942A (en) | 1988-03-23 |
| CN1005856B true CN1005856B (en) | 1989-11-22 |
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ID=4803023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86105942.5A Expired CN1005856B (en) | 1986-09-03 | 1986-09-03 | Method of controlling spinning machine and apparatus for perporming this method |
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| Country | Link |
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| CN (1) | CN1005856B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011112364A1 (en) * | 2011-09-02 | 2013-03-07 | Oerlikon Textile Gmbh & Co. Kg | Open-end rotor spinning machine |
| CN104375457B (en) * | 2013-01-29 | 2017-02-08 | 天津天纺生产力促进有限公司 | Control method and device for reducing spinning frame spinning yarn broken ends |
| JP2020083509A (en) * | 2018-11-19 | 2020-06-04 | 村田機械株式会社 | Production volume simulation device |
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1986
- 1986-09-03 CN CN86105942.5A patent/CN1005856B/en not_active Expired
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| CN86105942A (en) | 1988-03-23 |
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