CN110642091A - Constant small-tension path direct pay-off device and method thereof - Google Patents
Constant small-tension path direct pay-off device and method thereof Download PDFInfo
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- CN110642091A CN110642091A CN201910907288.3A CN201910907288A CN110642091A CN 110642091 A CN110642091 A CN 110642091A CN 201910907288 A CN201910907288 A CN 201910907288A CN 110642091 A CN110642091 A CN 110642091A
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- cylinder
- hysteresis brake
- yarn group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
- B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
- B65H59/043—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support with a braking force varying proportionally to the diameter or the weight of the package being unwound
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
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- Tension Adjustment In Filamentary Materials (AREA)
Abstract
The invention discloses a constant small-tension path direct pay-off device which comprises a base, a yarn ball mounting cylinder, a hysteresis brake and a guide wheel, wherein the yarn ball mounting cylinder and the guide wheel are both mounted on the base and can rotate on the base, the end part of the yarn ball mounting cylinder is connected with the hysteresis brake, a steering wheel speed measurement approach switch and a mounting cylinder speed measurement approach switch are respectively fixed on the guide wheel and the yarn ball mounting cylinder, and the magnetic torque output by the hysteresis brake is reduced along with the increase of the rotating speed of the yarn ball mounting cylinder. The invention further provides a paying-off method of the constant small-tension path direct paying-off device. The constant small-tension path direct pay-off device and the method thereof can realize constant tension control on the pay-off.
Description
Technical Field
The invention relates to the technical field of optical cable production auxiliary equipment, in particular to a constant small-tension path direct pay-off device and a method thereof.
Background
The products with partial structure types of the optical cable need to use a large amount of aramid polyester yarns, and due to the use of the yarns and the use of small tension thereof, the number of guide wheels passing through the aramid unwinding process is expected to be reduced as much as possible, so that cable rolling and yarn breakage defective products caused by yarn branching and strand breakage are reduced.
The tensile property of the optical cable is mainly realized by the polyester yarn, and the polyester yarn needs to be provided with pretension in the paying-off process so as to improve the tensile property of the optical cable. The current realization method of the process equipment is as follows: the yarn ball is fixed on a support rod without rotating, and is directly released by utilizing a yarn back-twisting mode, a torsion spring type tension clamp is additionally arranged on a path, and the pretension of a tension torsion spring is overcome by means of the friction force of a magnetic ring between the yarn and the tension clamp, so that the release of small tension is realized. This pay-off method has the following problems: the constant-torque paying-off is adopted, the diameter of a yarn group is gradually reduced along with the paying-off in the paying-off process, so that the paying-off tension can be gradually increased, the tightness of the paid-off yarn is different, the tension of polyester yarns in the length direction of the optical cable is different, the phenomena of branching and strand breakage are easily caused, the hidden danger of inferior-quality products is caused, the tensile uniformity of the optical cable is influenced, and the mechanical performance of the optical cable is influenced.
Disclosure of Invention
The invention mainly aims to provide a constant small-tension path direct pay-off device and a method thereof, aiming at realizing constant tension control on pay-off.
In order to achieve the above object, the present invention provides a constant small tension path pay-off device, comprising a base, a yarn package installation cylinder, a hysteresis brake and a guide wheel, wherein,
yarn group installation section of thick bamboo and leading wheel all install on the base and rotatable on the base, yarn group installation section of thick bamboo end connection has the hysteresis brake, is fixed with steering wheel speed measurement proximity switch and installation section of thick bamboo speed measurement proximity switch on leading wheel and the yarn group installation section of thick bamboo respectively, and the magnetic moment that hysteresis brake output reduces along with the increase of yarn group installation section of thick bamboo rotational speed.
Preferably, the magnetic torque value T = (f × ω 2 × r)/ω 1 of the hysteresis brake; and (f × r) is a constant;
wherein f is an unwinding tension value, omega 1 is a rotating speed value of the yarn group installation cylinder, omega 2 is a rotating speed value of the guide wheel, omega 2 is adjusted in real time according to the production speed of the production line, and r is the radius of the guide wheel.
Preferably, the constant low-tension path pay-off device further comprises a controller electrically connected with the hysteresis brake, the steering wheel speed measurement proximity switch and the installation cylinder speed measurement proximity switch, wherein the controller adjusts the magnetic torque of the hysteresis brake in real time according to the rotating speed values measured by the steering wheel speed measurement proximity switch and the installation cylinder speed measurement proximity switch, so that the magnetic torque output by the hysteresis brake is reduced along with the increase of the rotating speed of the yarn group installation cylinder to realize constant tension pay-off.
Preferably, the yarn group installation cylinder comprises an installation cylinder body and a positioning mechanism located at the end of the installation cylinder body, the positioning mechanism comprises a cylinder coaxially arranged with the installation cylinder body, a cam located inside the cylinder and at least one metal taper pin, the cam is connected with a driving mechanism, a through hole is formed in the cylinder, one end of a tapered portion of the metal taper pin penetrates through the through hole, and the other end of the metal taper pin abuts against the contour of the cam.
Preferably, the metal taper pin is further sleeved with an elastic piece, the driving mechanism comprises a rotating handle fixedly connected with the cam, and one end of the rotating handle protrudes out of the cylinder.
Preferably, the number of the cams is at least two, each cam corresponds to at least one metal taper pin, and the rotating handle fixedly connects all the cams; the mounting hole has been seted up at the cam middle part, and twist grip includes the dabber and with the fixed handle portion of dabber tip, the dabber runs through the mounting hole with all cam fixed connection, handle portion is located the drum outside.
Preferably, the cylinder is detachably connected with the mounting cylinder body, and the axis of the through hole of the cylinder is perpendicular to the axis of the cylinder; the outer side wall of the installation cylinder body is evenly provided with a plurality of arc-shaped reeds in the circumferential direction.
Preferably, the base includes the base of level setting and installs on the base and the riser of vertical setting, and the one end of yarn group installation section of thick bamboo passes the mounting hole on the riser and is located the hysteresis brake fixed connection of riser opposite side.
Preferably, the vertical plate is provided with an indexing mounting plate supporting cylinder, the guide wheel frame is arranged on the guide wheel supporting seat, and the guide wheel supporting seat is fixed on the indexing mounting plate supporting cylinder.
The invention further provides a pay-off method based on the constant small-tension path direct pay-off device, which comprises the following steps of:
acquiring the current rotating speed values of the yarn roll installation cylinder and the guide wheel in real time;
calculating to obtain an actual radius value when the current yarn group is unreeled according to the current rotating speed values of the yarn group installation cylinder and the guide wheel and the radius value of the guide wheel;
and calculating a target magnetic torque value of the hysteresis brake according to the actual radius value and the preset unwinding tension value when the yarn group is unwound, and adjusting the magnetic torque of the hysteresis brake according to the target magnetic torque value.
The constant small-tension path direct pay-off device provided by the invention has the following beneficial effects:
1. the constant tension control of the paying-off can be realized by adjusting the magnetic moment value of the hysteresis brake in real time, so that the tension of the polyester yarn is constant in the paying-off process, the tensile uniformity of the polyester yarn is improved, the hidden danger of inferior-quality products is reduced, the tensile uniformity of the optical cable in the length direction is improved, and the overall mechanical performance of the optical cable is improved;
2. the speed measurement proximity switch is fixed on the guide wheel and the yarn ball mounting cylinder, the real-time radius of rotation of the end of the yarn cylinder can be calculated in real time according to the measured rotating speed, and the real-time radius is used as a magnetic moment adjusting basis of the hysteresis brake to adjust the magnetic moment of the hysteresis brake in real time, so that the constant tension control of paying-off can be realized;
3. the pay-off device adopts a simple principle, adjusts the magnetic torque of the hysteresis brake, has few friction points, cannot damage yarns, and has an ingenious structure;
4. the yarn group installation cylinder is designed in a manner of circumferential uniform distribution, the variable required by tension is measured at one point, the tension is given at multiple points simultaneously, and each point is provided with a tension control scheme of potentiometer correction compensation, so that a simplified constant tension control mode is adopted, the construction speed of the system is simplified, and the equipment is convenient to move, exchange and use;
5. the constant tension is adopted for paying off, so that the condition that the production is interrupted due to the fact that the polyester yarn is broken when the tension is larger in the prior art is avoided, and the normal operation of the production is ensured;
6. the design of the hysteresis brake with small moment is adopted, and the maximum torque output is ensured on hardware, so that the maximum tension under the abnormal condition is ensured not to be overlarge.
Drawings
FIG. 1 is a schematic structural view of a constant low-tension path pay-off device according to the present invention;
FIG. 2 is a schematic cross-sectional view of a yarn package mounting tube in the constant small-tension path pay-off device according to the present invention;
FIG. 3 is a schematic cross-sectional structural view of a positioning mechanism in the constant small-tension path pay-off device of the present invention.
In the figure, 1-a magnetic hysteresis brake, 2-an installation barrel speed measurement proximity switch, 3-a yarn group installation barrel, 4-polyester yarn, 5-a positioning mechanism, 6-a guide wheel, 7-a steering wheel speed measurement proximity switch, 8-a guide wheel supporting seat, 9-an indexing installation plate supporting barrel, 10-an arc reed, 11-a metal taper pin, 12-a mandrel, 13-a cam, 14-a rotating handle and 15-a cylinder.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a constant small-tension path direct pay-off device.
Referring to fig. 1 to 3, in the present preferred embodiment, a constant small tension path pay-off device includes a base, a package mounting tube 3, a hysteresis brake 1, and a guide pulley 6, wherein,
yarn group installation section of thick bamboo 3 and leading wheel 6 are all installed on the base and rotatable on the base, 3 end connection of yarn group installation section of thick bamboo has hysteresis brake 1, be fixed with respectively on leading wheel 6 and the yarn group installation section of thick bamboo 3 and turn to the wheel proximity switch 7 that tests the speed and the installation section of thick bamboo proximity switch 2 that tests the speed (survey the rotational speed of leading wheel 6 and yarn group installation section of thick bamboo 3 respectively), according to the real-time adjustment hysteresis brake 1's of the rotational speed value of the yarn group installation section of thick bamboo 3 and leading wheel 6 that record magnetic moment, the magnetic moment of hysteresis brake 1 output reduces along with the increase of the 3 rotational speeds of yarn group installation section of thick bamboo.
The yarn group is sleeved on the yarn group mounting cylinder 3 and then is output after being guided by the guide wheel 6. Specifically, the base includes the base that the level set up and installs on the base and the riser of vertical setting, and the one end of yarn group installation section of thick bamboo 3 passes the mounting hole on the riser and is located 1 fixed connection of hysteresis lag brake of riser opposite side. The hysteresis brake 1 is controlled with a small torque. The axis of the guide wheel 6 is perpendicular to the axis of the yarn group installation cylinder 3.
Referring to fig. 1, an indexing mounting plate supporting cylinder 9 is installed on a vertical plate, a guide wheel 6 is erected on a guide wheel supporting seat 8, and the guide wheel supporting seat 8 is fixed on the indexing mounting plate supporting cylinder 9.
In this embodiment, two yarn ball mounting drums 3 and an indexing mounting plate supporting drum 9 are mounted on the base. The upper end and the lower end of the indexing mounting plate supporting cylinder 9 are both fixed with a guide wheel supporting seat 8. Each yarn group installation barrel 3 is correspondingly provided with a guide wheel 6.
Further, the constant small-tension path direct pay-off device further comprises a controller (not shown in the figure) electrically connected with the hysteresis brake 1, the steering wheel speed measurement proximity switch 7 and the mounting cylinder speed measurement proximity switch 2. The controller adjusts the magnetic torque of the hysteresis brake 1 in real time according to the rotating speed values measured by the steering wheel speed measuring proximity switch 7 and the mounting cylinder speed measuring proximity switch 2, so that the magnetic torque output by the hysteresis brake 1 is reduced along with the increase of the rotating speed of the yarn group mounting cylinder 3 to realize constant tension paying off.
Further, referring to fig. 2 and 3, the yarn group installation cylinder 3 includes an installation cylinder body and a positioning mechanism 5 located at an end of the installation cylinder body, the positioning mechanism 5 includes a cylinder 15 coaxially disposed with the installation cylinder body, a cam 13 located inside the cylinder 15 and at least one metal taper pin 11, wherein the cam 13 is connected with a driving mechanism for driving the cam to rotate, a through hole is formed in the cylinder 15, one end of a tapered portion of the metal taper pin 11 is inserted into the yarn group paper cylinder by penetrating through the through hole, and the other end of the metal taper pin 11 abuts against a contour of the cam 13. The elastic element is a spring sleeved outside the metal taper pin 11.
The metal taper pin 11 is also sleeved with an elastic part. The driving mechanism comprises a rotating handle 14 fixedly connected with the cam 13, and one end of the rotating handle 14 protrudes out of the cylinder 15.
Referring to fig. 2 and 3, at least two cams 13 (two cams are illustrated in the drawings) are provided, each cam 13 corresponds to at least one metal taper pin 11, and a rotating handle 14 fixedly connects all cams 13. In the present embodiment, three metal taper pins 11 are specifically illustrated for each cam 13, and in this case, the cam 13 is a three-lobe cam 13. In order to stabilize the yarn paying-off process and prevent yarn balls from breaking down, at least two cams 13 are arranged.
Furthermore, a mounting hole is formed in the middle of the cam 13, the rotating handle 14 includes a mandrel 12 and a handle portion fixed to the end of the mandrel 12, the mandrel 12 penetrates through the mounting hole to fixedly connect all the cams 13, and the handle portion is located outside the cylinder 15. When the rotating handle 14 rotates the cam 13, the tapered portion of the metal taper pin 11 can be completely accommodated in the through hole.
The cylinder 15 is detachably connected with the mounting cylinder body, and the axis of the through hole of the cylinder 15 is vertical to the axis of the cylinder 15; the outer side wall of the installation cylinder body is evenly provided with a plurality of arc-shaped reeds 10 in the circumferential direction.
The yarn group radial fixing mode: the arc-shaped reeds 10 are uniformly distributed along the circumferential direction, and the radial fixation of the yarn group is realized by utilizing the outward tensioning force of the arc-shaped reeds 10.
The axial fixing mode of the yarn group is as follows: the circumferential uniform distribution fixing design is adopted, and the forced wedging force of the metal taper pin 11 tightly grasps the paper cylinder of the yarn ball in a quick fixing mode of the metal taper pin 11. The rotating handle 14 drives the cam 13 to rotate, so that the metal taper pin 11 is driven and supported to move upwards.
The yarn group mounting cylinder 3 can effectively prevent yarn groups from sliding possibly in the axial direction, and the safety and reliability of the aramid fiber unwinding process are improved. And the cam 13 is matched with the metal taper pin 11 to realize positioning, so that the operation is convenient and the positioning is accurate. In addition, the yarn group mounting cylinder 3 also has the advantages of simple structure, easy realization and reliable work.
A magnetic torque value T = (f × ω 2 × r)/ω 1 of the hysteresis brake 1; and (f × r) is constant, T is inversely proportional to ω 1 (when ω 2 is fixed);
wherein f is an unwinding tension value (a preset constant), ω 1 is a rotation speed value of the yarn group mounting cylinder 3, ω 2 is a rotation speed value of the guide wheel 6, ω 2 is a real-time adjustment to track the production speed of the production line according to the production speed of the production line, and r is the radius of the guide wheel 6.
1. According to the requirement of constant tension, the magnetic torque output of the hysteresis brake 1 needs to be adjusted, and according to physical knowledge T = f multiplied by R (wherein T is passive magnetic torque, f is an unwinding tension value, and R is an unwinding radius), the device can be respectively provided with high-speed proximity sensors for measuring the speed on the yarn group mounting cylinder 3 and the guide wheel 6 at the unwinding end, so that the rotating speeds omega at two positions can be respectively measured, and the unwinding tension value is a preset value;
2. according to the method, ω 1 × R = v = ω 2 × R at the time of unreeling;
(omega 1: the rotating speed of the yarn ball mounting cylinder 3, R: the radius of the yarn ball when unreeling, V: the linear speed of unreeling, omega 2: the rotating speed of the guide wheel 6, R: the radius of the guide wheel 6)
The real-time rotating radius R of the yarn group mounting cylinder 3 can be obtained in real time, so that a basis is provided for controlling the magnetic torque output.
3. And setting the large torque of the outer ring of the bobbin and the small torque required near the finished yarn according to the requirement, then decreasing in real time according to the change of R to finish iterative calculation, automatically giving the current value of the output torque T of the hysteresis brake 1 in real time, and finishing constant tension control.
The constant small-tension path direct pay-off device provided by the invention has the following beneficial effects:
1. the constant tension control of the paying-off can be realized by adjusting the magnetic moment value of the hysteresis brake in real time, so that the tension of the polyester yarn is constant in the paying-off process, the tensile uniformity of the polyester yarn is improved, the hidden danger of inferior-quality products is reduced, the tensile uniformity of the optical cable in the length direction is improved, and the overall mechanical performance of the optical cable is improved;
2. the guide wheel 6 and the yarn ball mounting cylinder 3 are fixed with a speed measurement proximity switch, the real-time radius of the rotation of the yarn cylinder end can be calculated in real time according to the measured rotating speed, the radius is used as the magnetic moment adjusting basis of the magnetic hysteresis brake 1, the magnetic moment of the hysteresis brake 1 is adjusted in real time, and the paying-off constant tension control can be realized;
3. the pay-off device adopts a simple principle, adjusts the magnetic torque of the hysteresis brake 1, has few friction points, cannot damage yarns, and has an ingenious structure;
4. the yarn group mounting cylinder 3 is designed in a manner of circumferential uniform distribution, the variable required by tension is measured at one point, the tension is given at multiple points simultaneously, and each point is provided with a tension control scheme of potentiometer correction compensation, so that a simplified constant tension control mode is adopted, the building speed of the system is simplified, and the equipment is convenient to move, exchange and use;
5. the constant tension is adopted for paying off, so that the condition that the production is interrupted due to the fact that the polyester yarn is broken when the tension is larger in the prior art is avoided, and the normal operation of the production is ensured;
6. the design of the hysteresis brake 1 with small moment is adopted, and the maximum torque output is ensured on hardware, so that the maximum tension under the abnormal condition is ensured not to be overlarge.
The invention further provides a paying-off method of the constant small-tension path direct paying-off device.
In the preferred embodiment, a paying-off method based on the above-mentioned constant small-tension path direct paying-off device includes the following steps:
step S10, obtaining the current rotating speed values of the yarn group installation barrel 3 and the guide wheel 6 in real time;
step S20, calculating an actual radius value when the current yarn group is unwound according to the current rotation speed values of the yarn group mounting cylinder 3 and the guide wheel 6 and the radius value of the guide wheel 6 (calculating a radius R when the yarn group is unwound according to a formula ω 1 × R = v = ω 2 × R);
step S30, calculating a target magnetic moment value of the hysteresis brake 1 according to the actual radius value when the yarn group is unwound and the preset unwinding tension value, and adjusting the magnetic moment of the hysteresis brake 1 according to the target magnetic moment value (calculating to obtain the target magnetic moment value T according to the formula T = f × R).
The method for directly paying off the yarn with the constant small tension path can measure two current rotating speed values of the yarn ball mounting cylinder 3 and the guide wheel 6, and then obtains a target magnetic torque value of the hysteresis brake 1 through a series of calculations, and can achieve constant tension control of paying off by adjusting the magnetic torque of the hysteresis brake 1.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are intended to be covered by the scope of the present invention.
Claims (10)
1. A constant small tension path direct pay-off device is characterized by comprising a base, a yarn group installation cylinder, a magnetic hysteresis brake and a guide wheel, wherein,
yarn group installation section of thick bamboo and leading wheel all install on the base and rotatable on the base, yarn group installation section of thick bamboo end connection has the hysteresis brake, is fixed with steering wheel speed measurement proximity switch and installation section of thick bamboo speed measurement proximity switch on leading wheel and the yarn group installation section of thick bamboo respectively, and the magnetic moment that hysteresis brake output reduces along with the increase of yarn group installation section of thick bamboo rotational speed.
2. The constant small tension path pay-off as defined in claim 1, wherein a magnetic moment value T = (f x ω 2 x r)/ω 1 of the hysteresis brake; and (f × r) is a constant;
wherein f is an unwinding tension value, omega 1 is a rotating speed value of the yarn group installation cylinder, omega 2 is a rotating speed value of the guide wheel, omega 2 is adjusted in real time according to the production speed of the production line, and r is the radius of the guide wheel.
3. The constant low tension path pay-off device as claimed in claim 1, further comprising a controller electrically connected to the hysteresis brake, the steering wheel speed measurement proximity switch and the mounting tube speed measurement proximity switch, wherein the controller adjusts the magnetic torque of the hysteresis brake in real time according to the rotation speed values measured by the steering wheel speed measurement proximity switch and the mounting tube speed measurement proximity switch, so that the magnetic torque output by the hysteresis brake decreases with the increase of the rotation speed of the yarn package mounting tube to realize constant tension pay-off.
4. The constant small tension path pay-off device as claimed in claim 1, wherein the yarn group mounting cylinder comprises a mounting cylinder body and a positioning mechanism arranged at the end part of the mounting cylinder body, the positioning mechanism comprises a cylinder coaxially arranged with the mounting cylinder body, a cam arranged inside the cylinder and at least one metal taper pin, wherein the cam is connected with a driving mechanism, a through hole is arranged on the cylinder, one end of the taper part of the metal taper pin penetrates through the through hole, and the other end of the metal taper pin abuts against the cam profile.
5. The constant small tension path pay-off device as claimed in claim 4, wherein the metal taper pin is further covered with an elastic member, the driving mechanism comprises a rotating handle fixedly connected with the cam, and one end of the rotating handle protrudes outside the cylinder.
6. The constant low tension path pay-off device as claimed in claim 5, wherein said cams are provided in at least two numbers, each cam corresponding to at least one metal taper pin, and a rotating handle fixedly connecting all cams; the mounting hole has been seted up at the cam middle part, and twist grip includes the dabber and with the fixed handle portion of dabber tip, the dabber runs through the mounting hole with all cam fixed connection, handle portion is located the drum outside.
7. The constant small tension path pay-off line as claimed in claim 4, wherein the cylinder is detachably connected to the mounting cylinder body, and an axis of the through hole of the cylinder is disposed perpendicular to an axis of the cylinder; the outer side wall of the installation cylinder body is evenly provided with a plurality of arc-shaped reeds in the circumferential direction.
8. The constant low-tension path pay-off device as claimed in claim 1, wherein the base comprises a horizontally arranged base and a vertically arranged vertical plate mounted on the base, and one end of the yarn group mounting tube passes through a mounting hole on the vertical plate and is fixedly connected with the hysteresis brake positioned on the other side of the vertical plate.
9. The constant low tension path pay-off device as claimed in claim 8, wherein the riser is provided with an index mounting plate support cylinder, the guide wheel frame is provided on a guide wheel support fixed to the index mounting plate support cylinder.
10. A wire unwinding method based on the constant small tension path direct wire unwinding device of any one of claims 1 to 9, comprising the steps of:
acquiring the current rotating speed values of the yarn roll installation cylinder and the guide wheel in real time;
calculating to obtain an actual radius value when the current yarn group is unreeled according to the current rotating speed values of the yarn group installation cylinder and the guide wheel and the radius value of the guide wheel;
and calculating a target magnetic torque value of the hysteresis brake according to the actual radius value and the preset unwinding tension value when the yarn group is unwound, and adjusting the magnetic torque of the hysteresis brake according to the target magnetic torque value.
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| JPH09110296A (en) * | 1995-07-24 | 1997-04-28 | Alcatel Kabel Ag & Co | Device to electromagnetically brake at least one thread feeding bobbin which is rotatable supported on hollow shaft,and connect said bobbin |
| CN2471759Y (en) * | 2001-03-05 | 2002-01-16 | 平阳县天风塑料机械厂 | Flat plastic wire winder |
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| CN203976090U (en) * | 2014-05-19 | 2014-12-03 | 石家庄天泰电力变压器有限公司 | Magnetic powders brake paying out machine |
| CN204474030U (en) * | 2014-12-26 | 2015-07-15 | 东莞市张力机电科技有限公司 | A kind of unreeling tension control device |
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Effective date of registration: 20220614 Address after: 430073 No.9, Guanggu Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK Ltd. Patentee after: Sichuan Lefei Photoelectric Technology Co., Ltd Address before: 430073 Optics Valley Avenue, East Lake New Technology Development Zone, Wuhan, Hubei, 9 Patentee before: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK Ltd. |
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