CN103331395B - Control method of twist start of steel cord - Google Patents
Control method of twist start of steel cord Download PDFInfo
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- CN103331395B CN103331395B CN201310205592.6A CN201310205592A CN103331395B CN 103331395 B CN103331395 B CN 103331395B CN 201310205592 A CN201310205592 A CN 201310205592A CN 103331395 B CN103331395 B CN 103331395B
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- steel cord
- false twist
- twist device
- rotating speed
- cord
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Abstract
The invention discloses a control method of twist start of a steel cord. The method comprises the steps of adjusting rotating speed of a false twister according to a false twister rotating speed rise standard curve preset in a control system, further slightly adjusting the rotating speed of the false twister according to change in a steel cord twist value detected in real time till twist of each point on the steel cord meet the requirements, wherein the false twister rotating speed rise standard curve is formed by repeatedly starting steel cord production equipment for many times, sampling a plurality of sampling points in the same position on the steel cord, correcting the rotating speed of the false twister at the same sampling point on the steel cord according to a formula, and drawing corresponding to take-up meter length according to the corrected rotating speeds of the false twister at the sampling points. According to the control method, the standard curve is established to allow the rotating speed of the false twister during the start is matched with the speed of a host, so that the twist value of the cord is controlled during the start. According to the control method, the mechanical structure of the original equipment is not require, and the quality of the steel cord can be improved significantly.
Description
Technical field
The present invention relates to steel cord production technical field, refer to that a kind of steel cord starts the control method reversed particularly.
Background technology
Steel cord is made up of more than two or two steel wires, or the structure that the combination by stock and stock or the combination by stock and silk are formed.The steel cord (being generally 6m) of specific length, when its one end is fixed, when the other end is let alone to rotate freely, the revolution rotated is referred to as the Residual torsion value of this section of steel cord.Steel cord Residual torsion value (hereinafter referred to as torsion) is a very important technological parameter during steel cord is produced.
Each section of torsion of steel cord is completely taken turns in steel cord production requirement one must within certain scope.The principal element that inside putting outer receipts type plying equipment affect cord torsion has the rotating ratio, swage volume under pressure, Tensity size, monofilament circle footpath etc. of false twist device and main frame, but a certain device start is completed, after stabilization of speed, the factor such as swage volume under pressure, Tensity size, monofilament circle footpath is almost constant, very little on the impact change reversed, only need search out a best false twist device and engine speed than the cord torsional stabilizer that just can ensure to produce in the scope required.In prior art, Chinese utility model patent " cord residual torsional force on-line measuring device " (application number: this process is described in detail 200920227558.8), its cardinal principle is: the torsion detecting steel cord by reversing on-line measuring device, the rotating speed (rotating ratio of false twist device and main frame) of continuous adjustment false twist device, until reverse in the scope required.But in actual production, point on steel cord after being reversed by false twist device still needs to arrive torsion detecting device through tens meters of ability, therefore checkout gear has certain hysteresis quality, but in device start process, main frame speed rises in time, after torsion being detected, main frame speed raises, and there is not the reference speed of adjustment.So the mode uncontrollable device start stage of this " first detect and adjust afterwards ", namely main frame and false twist device rotating speed are from the torsion of the cord produced in 0 to stabilized (steady-state) speed stage.
Summary of the invention
The object of the invention is to overcome during existing steel cord is produced and uncontrollable defect is reversed to the cord in device start stage, provide a kind of steel cord to start the control method reversed.
For achieving the above object, the steel cord designed by the present invention starts the control method reversed, and comprises the steps:
1) steel cord production equipment is set, it comprises the false twist device, cord residual torsional force checkout gear, the take-up pulley that arrange according to steel cord direction of motion order, described take-up pulley place is provided with meter counter, and described false twist device, cord residual torsional force checkout gear, meter counter are all connected with control system;
2) steel cord production equipment is started, according to the rotating speed of the false twist device rotating speed rising calibration curve adjustment false twist device preset in control system, and the change of the steel cord torsion value simultaneously detected according to cord residual torsional force checkout gear, the rotating speed of further fine setting false twist device, until the torsion of each point meets the requirements on steel cord;
Wherein, the acquisition methods of described false twist device rotating speed rising calibration curve is as follows:
(1) every constant spacing, the steel cord torsion value detect cord residual torsional force checkout gear and the rotating speed of false twist device are sampled,
(2) repeated priming steel cord production equipment is repeatedly, samples to the sampled point of same position multiple on steel cord, and according to following formula, the same sampled point on steel wire is carried out to the rotating speed correction of false twist device,
V
n+1=V
n+ k (A
n-A
if)
In formula, V
nbe the rotating speed of the false twist device of sample point when starting steel cord production equipment for n-th time, V
n+1be the rotating speed of the false twist device of sample point when starting steel cord production equipment for (n+1)th time, A
iffor steel cord needs the default torsion value that reaches, A
nbe the torsion value of sample point when starting steel cord production equipment for n-th time, k is false twist device adjustment of rotational speed coefficient,
(3) according to the rotating speed of the false twist device of above-mentioned multiple sample point correction, the long L of take-up rice of corresponding meter counter record carries out Drawing of Curve, obtains false twist device rotating speed rising calibration curve;
Preferably, above-mentioned steel cord starts in the control method reversed, the defining method obtaining step (2) the described false twist device adjustment of rotational speed coefficient k of false twist device rotating speed rising calibration curve is: first, empirically preset the false twist device adjustment of rotational speed coefficient being less than end value and be designated as b, along with successively starting steel cord production equipment, continue to increase b value, and monitor A
nwith A
ifbetween difference, until there is concussion and amplitude exceedes steel cord when reversing the error range allowed, the false twist device adjustment of rotational speed coefficient recorded now is designated as b ', then determines k=(0.6 ~ 0.8) b '.
Preferably, above-mentioned steel cord starts in the control method reversed, and the constant spacing described in step (1) obtaining false twist device rotating speed rising calibration curve is the distance between the test point of false twist device outlet and cord residual torsional force checkout gear.
Beneficial effect of the present invention: utilize and set up also constantly false twist device rotating speed rising calibration curve in optimal startup process in the controls, make false twist device rotating speed and main frame speeds match in start-up course, thus control the torsion value of cord in start-up course.The present invention does not need the frame for movement changing existing equipment, can significantly improve steel cord quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the steel cord production equipment implementing the inventive method.
Fig. 2 is false twist device rotating speed rising calibration curve schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, 2, steel cord starts the control method reversed, and comprises the steps:
1) steel cord production equipment is set, it comprises the false twist device 1, cord residual torsional force checkout gear 2, the take-up pulley 3 that arrange according to steel cord direction of motion order, described take-up pulley 3 place is provided with meter counter 4, and described false twist device 1, cord residual torsional force checkout gear 2, meter counter 4 are all connected with control system;
2) steel cord production equipment is started, according to the rotating speed of the false twist device rotating speed rising calibration curve adjustment false twist device 1 preset in control system, and the change of the steel cord torsion value simultaneously detected according to cord residual torsional force checkout gear 2, the rotating speed of further fine setting false twist device 1, until the torsion of each point meets the requirements on steel cord;
Wherein, the acquisition methods of described false twist device rotating speed rising calibration curve is as follows:
(1) distance between the test point setting false twist device 1 outlet and cord residual torsional force checkout gear 2 is as L
0, by L
0the sampling period is reversed, every L as cord
0, the steel cord torsion value detect cord residual torsional force checkout gear 2 and the rotating speed of false twist device 1 are sampled,
(2) repeated priming steel cord production equipment is repeatedly sampled to the sampled point of same position multiple on steel cord, and according to following formula, the same sampled point on steel cord is carried out to the rotating speed correction of false twist device 1,
V
n+1=V
n+ k (A
n-A
if)
In formula, V
nbe the rotating speed of the false twist device 1 of sample point when starting steel cord production equipment for n-th time, V
n+1be the rotating speed of the false twist device 1 of sample point when starting steel cord production equipment for (n+1)th time, A
iffor steel cord needs the default torsion value that reaches, A
nbe the torsion value of sample point when starting steel cord production equipment for n-th time, k is false twist device adjustment of rotational speed coefficient,
Device start moment, false twist device rotating speed V=0, take-up rice is long is 0, and torsion value is A
0, corresponding length is L
0;
For sampled point same on steel cord,
Start for 1st time, the false twist device rotating speed recording this sampled point is V
1, metering length is L
1, steel cord torsion value is A
1, the extension position of this sampled point on actual corresponding steel cord is L
1+ L
0, so rotating speed V of the next time false twist device 1 of this sampled point through revising
2=V
1+ k (A
1-A
if)
After starting for 2nd time, when metering length is L
1time, the rotating speed of false twist device is revised speed V
2, then to detect metering length be L
1+ L
0time steel cord torsion A
2, according to A
2-A
iftorsional deflection value, obtain the rotating speed V of false twist device 1 next time
3,
Repeat above-mentioned makeover process, until this sampled point torsional deflection value is 0, namely this some torsion equals setting torsion.
(3) according to the rotating speed of the false twist device 1 of above-mentioned multiple sample point correction, the long L of take-up rice that corresponding meter counter 4 records carries out Drawing of Curve, obtains false twist device rotating speed rising calibration curve, as shown in Figure 2, and V
nthe block curve at place is start false twist device rotating speed rising calibration curve for n-th time, V
n+1the dashed curve at place is start false twist device rotating speed rising calibration curve for (n+1)th time, each startup is all revised the curve that the last time draws, until the torsional deflection value of each sampled point is 0, obtain the false twist device rotating speed rising calibration curve of more realistic need of production;
In the acquisition methods of described false twist device rotating speed rising calibration curve, the defining method of step (2) described false twist device adjustment of rotational speed coefficient k is: first, empirically preset the false twist device adjustment of rotational speed coefficient being less than end value and be designated as b, along with successively starting steel cord production equipment, continue to increase b value, and monitor A
nwith A
ifbetween difference, until there is concussion and amplitude exceedes steel cord when reversing the error range allowed, the false twist device adjustment of rotational speed coefficient recorded now is designated as b ', then determines k=(0.6 ~ 0.8) b '.
Acquisition methods general device according to above-mentioned false twist device rotating speed rising calibration curve only need start about 3 times, just can obtain better suited false twist device rotating speed rising calibration curve, substantially meet steel cord torsional requirements, reduce scrappage and the production cost of finished product.
Claims (3)
1. steel cord starts the control method reversed, and comprises the steps:
1) steel cord production equipment is set, it comprises the false twist device (1), cord residual torsional force checkout gear (2), the take-up pulley (3) that arrange according to steel cord direction of motion order, described take-up pulley (3) place is provided with meter counter (4), and described false twist device (1), cord residual torsional force checkout gear (2), meter counter (4) are all connected with control system;
2) steel cord production equipment is started, according to the rotating speed of false twist device rotating speed rising calibration curve adjustment false twist device (1) preset in control system, and the change of the steel cord torsion value simultaneously detected according to cord residual torsional force checkout gear (2), the rotating speed of further fine setting false twist device (1), until the torsion of each point meets the requirements on steel cord;
Wherein, the acquisition methods of described false twist device rotating speed rising calibration curve is as follows:
(1) every constant spacing, the steel cord torsion value detect cord residual torsional force checkout gear (2) and the rotating speed of false twist device (1) are sampled,
(2) repeated priming steel cord production equipment is repeatedly, samples to the sampled point of same position multiple on steel cord, and according to following formula, the same sampled point on steel cord is carried out to the rotating speed correction of false twist device (1),
V
n+1=V
n+ k(A
n-A
if)
In formula, V
nbe the rotating speed of the false twist device (1) of sample point when starting steel cord production equipment for n-th time, V
n+1be the rotating speed of the false twist device (1) of sample point when starting steel cord production equipment for (n+1)th time, A
iffor steel cord needs the default torsion value that reaches, A
nbe the torsion value of sample point when starting steel cord production equipment for n-th time, k is false twist device adjustment of rotational speed coefficient,
(3) according to the rotating speed of the false twist device (1) of above-mentioned multiple sample point correction, the long L of take-up rice that corresponding meter counter (4) records carries out Drawing of Curve, obtains false twist device rotating speed rising calibration curve.
2. steel cord according to claim 1 starts the control method reversed, it is characterized in that: in the acquisition methods of described false twist device rotating speed rising calibration curve, the defining method of step (2) described false twist device adjustment of rotational speed coefficient k is: first, empirically preset the false twist device adjustment of rotational speed coefficient being less than end value and be designated as b, along with successively starting steel cord production equipment, continue to increase b value, and monitor A
nwith A
ifbetween difference, until there is concussion and amplitude exceedes steel cord when reversing the error range allowed, the false twist device adjustment of rotational speed coefficient recorded now is designated as b ', then determines k=(0.6 ~ 0.8) b '.
3. steel cord according to claim 1 and 2 starts the control method reversed, it is characterized in that: in the acquisition methods of described false twist device rotating speed rising calibration curve, the constant spacing described in step (1) is the distance between the test point of false twist device (1) outlet and cord residual torsional force checkout gear (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205592.6A CN103331395B (en) | 2013-05-29 | 2013-05-29 | Control method of twist start of steel cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205592.6A CN103331395B (en) | 2013-05-29 | 2013-05-29 | Control method of twist start of steel cord |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103331395A CN103331395A (en) | 2013-10-02 |
| CN103331395B true CN103331395B (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310205592.6A Active CN103331395B (en) | 2013-05-29 | 2013-05-29 | Control method of twist start of steel cord |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813711B (en) * | 2019-11-18 | 2022-12-16 | 宝钢金属有限公司 | Production method and device for accurately controlling torsion fluctuation of steel cord |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55136534A (en) * | 1979-04-13 | 1980-10-24 | Tokyo Seikou Kk | Production of steel cord |
| JPH07218788A (en) * | 1994-02-04 | 1995-08-18 | Fujikura Ltd | Manufacture device for sz slot cable |
| JP4979475B2 (en) * | 2007-06-08 | 2012-07-18 | 株式会社ブリヂストン | Twisted wire residual torsion measuring device, stranded wire machine and stranded wire winder equipped therewith |
| CN201495446U (en) * | 2009-08-21 | 2010-06-02 | 国营江北机械厂 | On-line detecting device for cord residual twist |
| CN102039358B (en) * | 2009-10-09 | 2013-02-13 | 青岛三高自控设备研发有限公司 | Steel cord corrector |
| JP5437303B2 (en) * | 2011-03-31 | 2014-03-12 | 三菱電機株式会社 | Shoreline equipment |
-
2013
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