CN114381846B - Device and method for adjusting yarn layer position on double-layer creel for drafting machine - Google Patents
Device and method for adjusting yarn layer position on double-layer creel for drafting machine Download PDFInfo
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- CN114381846B CN114381846B CN202111565302.XA CN202111565302A CN114381846B CN 114381846 B CN114381846 B CN 114381846B CN 202111565302 A CN202111565302 A CN 202111565302A CN 114381846 B CN114381846 B CN 114381846B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
- D03J1/14—Apparatus for threading warp stop-motion droppers, healds, or reeds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The device comprises a frame of the drafting machine, wherein a first layer of creel and a second layer of creel are arranged on a yarn clamping frame of the frame, the first layer of creel comprises a first upper yarn clamping frame and a first lower yarn clamping frame, and the second layer of creel comprises a second upper yarn clamping frame and a second lower yarn clamping frame; at least one of the first layer creel and the second layer creel is provided with a driving device, and the driving device shortens the interval between the first yarn layer and the second yarn layer when the interval between the first yarn layer and the second yarn layer exceeds a set value. According to the invention, the distance between the first yarn layer and the second yarn layer is effectively controlled within the set value through the driving device, so that the drafting machine can smoothly acquire yarns on the first yarn layer and the second yarn layer, faults caused by overlarge distance between the first yarn layer and the second yarn layer are prevented, and the drafting efficiency is improved.
Description
Technical Field
The invention relates to a double-layer drafting control technology of a drafting machine, in particular to a device and a method for adjusting the yarn position on a double-layer creel for the drafting machine.
Background
A draw-in machine is an automated device for automatically threading yarn into heddles. The existing drafting machine for double-layer yarns needs to acquire a first layer of yarns or a second layer of yarns for drafting according to program setting, and in the double-shaft automatic drafting process of double-layer yarn layers, as the yarn layer positions of the two groups of yarn layers are different, when the difference between the two yarn layers is too large, the automatic drafting machine can be difficult to separate yarns correctly, so that faults occur. In the prior art, the gap between two yarn layers is not adjustable, more manual position adjustment or reciprocating operation of a machine head is adopted to make up the gap, so that the drafting efficiency is low and the failure rate is high.
Disclosure of Invention
The invention provides a yarn layer position adjusting device and method for a double-layer creel for a drafting machine, wherein the yarn layer position adjusting device and method are used for automatically adjusting yarn layer gaps.
The yarn layer position adjusting device on the double-layer yarn frame for the drafting machine comprises a frame of the drafting machine, wherein a first layer yarn frame and a second layer yarn frame are arranged on a yarn clamping frame of the frame, a first yarn layer is arranged on the first layer yarn frame, a second yarn layer is arranged on the second layer yarn frame, the first layer yarn frame comprises a first upper yarn clamping frame and a first lower yarn clamping frame, and the second layer yarn frame comprises a second upper yarn clamping frame and a second lower yarn clamping frame; at least one of the first layer creel and the second layer creel is provided with a driving device, and the driving device automatically shortens the distance between the first yarn layer and the second yarn layer when the distance between the first yarn layer and the second yarn layer exceeds an offset set value. The yarn layer position adjusting device on the double-layer yarn frame for the drafting machine adopts the driving device to automatically shorten the distance between the first yarn layer and the second yarn layer when the distance between the first yarn layer and the second yarn layer exceeds the offset set value, so that the drafting efficiency of the drafting machine is improved, and the technical problem of high failure rate caused by overlarge distance between the two yarn layers is solved.
The double-eye camera is arranged on the drafting machine, and is used for respectively acquiring the position of the first yarn on the first yarn layer and the position of the second yarn on the second yarn layer, wherein the distance between the first yarn and the second yarn is an offset set value, and the offset set value is 0-100 mm. The binocular camera obtains the position of the first yarn on the first yarn layer, the position is generally that the yarn needing to be healed at present is the first yarn, the position of the yarn on the heald is the pixel value or the distance between the set reference value and the actual value of the first yarn, the binocular camera obtains the position of the second yarn on the second yarn layer, the position is generally that the yarn needing to be healed at present on the second yarn layer is the second yarn, and the position of the yarn on the heald is the pixel value or the distance between the set reference value and the actual value of the second yarn. The offset set point is 0mm-100mm, which can be expanded or contracted, and is within the scope of the invention.
The driving device comprises a stepping motor, and the stepping motor drives the first layer creel or the second layer creel to move through a connected screw rod.
The two stepping motors are respectively a first stepping motor and a second stepping motor, the first stepping motor is connected with a first screw rod through a first main shaft, and the first screw rod drives the second upper yarn clamping frame to move along the guide rail in a rotating way; the second stepping motor is connected with a second screw rod through a second main shaft, and the second screw rod rotates to drive the second lower yarn clamping frame to move along the guide rail.
The method for adjusting the yarn layer position on the double-layer creel for the drafting machine comprises the following steps:
step one: photographing the first yarns on the first yarn layer by the binocular camera to obtain a photo, wherein the pixel value between the reference positions of the first yarns and the binocular camera in the photo is a first pixel value;
step two: photographing a second yarn on the second yarn layer by the binocular camera to obtain a photo, wherein a pixel value between the second yarn in the photo and a reference position of the binocular camera is a second pixel value;
step three: the difference between the first pixel value and the second pixel value is an offset pixel value, the offset pixel value is converted into an actual offset value through calculation, and when the actual offset value is larger than an offset set value, the driving device drives the first layer creel or the second layer creel to move so that the actual offset value is smaller than the offset set value.
The offset pixel value is converted into an actual offset value through calculation, and the calculation method comprises the following steps:
1. the lead distance of the stepping motor is as follows: a, A is as follows;
2. the step number of one circle of rotation of the stepping motor is B;
3. the actual measurement shows that the corresponding actual distance of 1 pixel point in the photo is C,
let E be the number of steps that need to be rotated to offset one pixel, e=cb/a.
A large-scale drafting method for two yarn layers of a drafting machine comprises the following steps:
step one: the double-eye camera and the frame are arranged on the drafting machine, a first layer yarn frame and a second layer yarn frame are arranged on a yarn clamping frame of the frame, a first yarn layer is arranged on the first layer yarn frame, a second yarn layer is arranged on the second layer yarn frame, the first layer yarn frame comprises a first upper yarn clamping frame and a first lower yarn clamping frame, and the second layer yarn frame comprises a second upper yarn clamping frame and a second lower yarn clamping frame; at least one of the first layer creel and the second layer creel is provided with a driving device;
step two: the drafting machine starts to hook yarns on the first yarn layer or the second yarn layer for drafting, the maximum drafting proportion interval between the first yarn layer and the second yarn layer is 1:200, namely, after one yarn of the first yarn layer finishes drafting, the second yarn layer can continuously finish 200 yarns for drafting at most;
step three: according to the set drafting proportion, the drafting machine starts to hook the yarns on the first yarn layer or the second yarn layer, at the same time, the binocular camera shoots the first yarns on the first yarn layer and the second yarns on the second yarn layer to obtain photos respectively, a first pixel value and a second pixel value are obtained, the difference between the first pixel value and the second pixel value is an offset pixel value, the offset pixel value is equal to the drafting proportion between the first yarn layer and the second yarn layer, the drafting proportion is verified through the offset pixel value, and the driving device is used for controlling the offset pixel value to reach the set drafting proportion.
The drafting proportion is determined according to the technological requirements of a loom plant and different yarns, for example, a first yarn layer firstly has 2 yarn drafting, then a second yarn layer 5 yarn drafting, then the first yarn layer has 3 yarn drafting, then the second yarn layer 10 yarn drafting is sequentially reciprocated, which is a complex drafting proportion adjusting process, the existing drafting machine completely depends on the machine head to realize the drafting process with extremely low efficiency and high failure rate, the method adopts a driving device to control the offset pixel value to reach the set drafting proportion, for example, the first yarn layer firstly has 2 yarn drafting, then the second yarn layer 5 yarn drafting, then the first yarn layer has 3 yarn drafting, then the second yarn layer 10 yarn drafting is sequentially reciprocated, in the method, the offset pixel value can be controlled by a driving device to reach the set drafting proportion, the starting distance between a first yarn layer and a second yarn layer is zero, a palm threading machine head firstly carries out drafting on 2 yarns of the first yarn layer, then carries out drafting on 5 yarns of the second yarn layer, at the moment, the distance between the first yarn layer and the second yarn layer is 3 yarns, the drafting proportion is 1:3, the offset pixel value is obtained through photographing by a binocular camera, the yarn distance corresponding to the offset pixel value is obtained according to the calculation method of the invention, if the distance is the drafting proportion of 1:3, the distance between three yarns indicates that palm threading is completed in one cycle, then the next cycle can be carried out, and the distance between the first yarn layer and the second yarn layer can be adjusted to be zero through the driving device to enter the next cycle; then the first yarn layer has 3 yarn healds, and then the second yarn layer has 10 yarn healds which reciprocate in sequence.
In the process of the method, if the starting distance between the first yarn layer and the second yarn layer is zero, the palm threading machine head firstly carries out the drafting of 1 yarn on the first yarn layer, then carries out the drafting of 200 yarns on the second yarn layer, and the drafting proportion is 1:200.
According to the invention, the distance between the first yarn layer and the second yarn layer is effectively controlled within the offset set value through the driving device, so that the drafting machine can smoothly acquire yarns on the first yarn layer and the second yarn layer, faults caused by overlarge distance between the first yarn layer and the second yarn layer are prevented, and the drafting efficiency is improved.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view of a yarn level position adjusting device on a double-layer creel for a drafting machine;
FIG. 2 is a schematic view of a yarn clamping frame structure in the present invention;
FIG. 3 is an enlarged view of the yarn clamping frame according to the present invention;
FIG. 4 is a schematic diagram of a structure of a photograph of a first yarn on a first yarn layer by a binocular camera according to the present invention;
fig. 5 is a schematic diagram of a structure of a photograph of a second yarn on a second yarn layer by a binocular camera according to the present invention.
Detailed description of the preferred embodiments
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Referring to fig. 1-5, a yarn layer position adjusting device on a double-layer yarn rack for a drafting machine comprises a frame 1 of the drafting machine, a first yarn layer and a second yarn layer are arranged on a yarn clamping frame 4 of the frame 1, a first yarn layer is arranged on the first yarn layer, a second yarn layer is arranged on the second yarn layer, the first yarn layer comprises a first upper yarn clamping frame 2 and a first lower yarn clamping frame 14, the second yarn layer comprises a second upper yarn clamping frame 3 and a second lower yarn clamping frame 13, and two yarn layers are formed for hooking different yarns of the drafting machine for drafting.
In order to control the distance between yarns of two yarn layers, at least one of the first layer yarn frame and the second layer yarn frame is provided with a driving device, and when the distance between the first yarn layer and the second yarn layer exceeds an offset set value, the driving device can automatically shorten the distance between the first yarn layer and the second yarn layer, so that the drafting efficiency is improved. The driving device comprises a stepping motor, and the stepping motor drives the first layer creel or the second layer creel to move through a connected screw rod. The number of the stepping motors is two, namely a first stepping motor 7 and a second stepping motor 9. The first stepping motor 7 is connected with a first screw rod 17 through a first main shaft 8, and the first screw rod 17 drives the second upper yarn clamping frame 3 to move along the guide rail in a rotating mode. The second stepping motor 9 is connected with a second screw rod 18 through a second main shaft 11, and the second screw rod 18 rotates to drive the second lower yarn clamping frame 13 to move along the guide rail 16. The two stepping motors synchronously drive the first layer creel or the second layer creel to move, so that the service life of the motor is prolonged, and meanwhile, the driving force is increased.
The structure is that a binocular camera is mounted on the heald machine, the binocular camera respectively obtains the position of the first yarn 19 on the first yarn layer and the position of the second yarn 20 on the second yarn layer, the distance between the first yarn 19 and the second yarn 20 is an offset set value, and the offset set value is 0mm-100mm.
The method for adjusting the yarn layer position on the double-layer creel for the drafting machine comprises the following steps:
step one: the binocular camera photographs the first yarns 19 on the first yarn layer to obtain a photo, wherein the pixel value between the reference positions of the first yarns 19 relative to the binocular camera in the photo is a first pixel value 21;
step two: the binocular camera photographs the second yarns 20 on the second yarn layer to obtain a photograph, wherein the pixel value between the second yarns 20 in the photograph and the reference position of the binocular camera is a second pixel value 22;
step three: the difference between the first pixel value 21 and the second pixel value 22 is an offset pixel value, the offset pixel value is converted into an actual offset value through calculation, and when the actual offset value is greater than the offset set value, the driving device drives the first layer creel or the second layer creel to move so that the actual offset value is smaller than the offset set value. The offset pixel value is converted into an actual offset value by calculation, and the calculation method is as follows:
1. the lead distance of the stepping motor is as follows: a, A is as follows;
2. the step number of one circle of rotation of the stepping motor is B;
3. the actual measurement shows that the corresponding actual distance of 1 pixel point in the photo is C,
let E be the number of steps that need to be rotated to offset one pixel, e=cb/a.
For the purpose of illustrating the above-described movement method, for example, the following are mentioned:
1. the lead distance of the stepping motor is as follows: 10mm;
2. the step number of one circle of rotation of the stepping motor is 4000 steps;
3. from the actual measurement, 1 pixel point in the photo corresponds to the actual distance of 0.012mm/point,
let E be the number of steps to shift by one pixel, e=4.8 steps/point.
For example, the first pixel value 21 is 1307 pixels. The second pixel value 22 is 1168 pixels. Therefore, the actual offset value is 1307-1168=139 points, the pixel point which is actually required to be compensated for the offset set value of 0mm is 139 points, and the distance required to be moved by the creel is as follows:
139point multiplied by 0.012 mm/point=1.668 mm
The number of steps required to rotate by the creel motor is as follows: 139point times e= 667.2step
For the other cases, if the offset setting is 5mm and the pixel corresponding to 5mm is 5 divided by 0.0124mm/point is equal to 417point, the stepper motor does not need to act.
For the other cases, if the offset set point is 1mm,1mm corresponds to 1 divided by 0.0124mm/point equal to 83 points
The pixel point to be compensated is 139-83=56 point, and the distance to be moved by the creel is:
56point multiplied by 0.012 mm/point=0.672 mm.
The number of steps required to rotate by the creel motor is as follows: 56point times e=268.8 step.
A large-scale drafting method for two yarn layers of a drafting machine comprises the following steps:
step one: the double-eye camera and the frame 1 are arranged on the drafting machine, a first layer yarn frame and a second layer yarn frame are arranged on a yarn clamping frame 4 of the frame 1, a first yarn layer is arranged on the first layer yarn frame, a second yarn layer is arranged on the second layer yarn frame, the first layer yarn frame comprises a first upper yarn clamping frame 2 and a first lower yarn clamping frame 14, and the second layer yarn frame comprises a second upper yarn clamping frame 3 and a second lower yarn clamping frame 13; at least one of the first layer creel and the second layer creel is provided with a driving device;
step two: the drafting machine starts to hook yarns on the first yarn layer or the second yarn layer for drafting, the maximum drafting proportion interval between the first yarn layer and the second yarn layer is 1:200, namely, after one yarn of the first yarn layer finishes drafting, the second yarn layer can continuously finish 200 yarns for drafting at most;
step three: according to the set drafting proportion, when the drafting machine starts to hook the yarns on the first yarn layer or the second yarn layer, the binocular camera shoots the first yarns 19 on the first yarn layer and the second yarns 20 on the second yarn layer to obtain photos respectively, a first pixel value 21 and a second pixel value 22 are obtained, the difference between the first pixel value 21 and the second pixel value 22 is an offset pixel value, the offset pixel value is equal to the drafting proportion between the first yarn layer and the second yarn layer, verification of the drafting proportion is realized through the offset pixel value, and the driving device is used for controlling the offset pixel value to reach the set drafting proportion.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (1)
1. A large-scale drafting method of two yarn layers for a drafting machine is characterized in that: the drafting method comprises the following steps:
step one: the double-eye camera and the frame (1) are arranged on the drafting machine, a first layer yarn frame and a second layer yarn frame are arranged on a yarn clamping frame (4) of the frame (1), a first yarn layer is arranged on the first layer yarn frame, a second yarn layer is arranged on the second layer yarn frame, the first layer yarn frame comprises a first upper yarn clamping frame (2) and a first lower yarn clamping frame (14), and the second layer yarn frame comprises a second upper yarn clamping frame (3) and a second lower yarn clamping frame (13); at least one of the first layer creel and the second layer creel is provided with a driving device;
step two: the drafting machine starts to hook yarns on the first yarn layer or the second yarn layer for drafting, the maximum drafting proportion interval between the first yarn layer and the second yarn layer is 1:200, namely, after one yarn of the first yarn layer finishes drafting, the second yarn layer continuously finishes 200 yarns for drafting at most;
step three: according to the set drafting proportion, when the drafting machine starts to hook yarns on the first yarn layer or the second yarn layer to draw the drafting, the binocular camera shoots the first yarns (19) on the first yarn layer to obtain a photo, the pixel value between the first yarns (19) and the reference position of the binocular camera in the photo is a first pixel value (21), the binocular camera shoots the second yarns (20) on the second yarn layer to obtain the photo, and the pixel value between the second yarns (20) and the reference position of the binocular camera in the photo is a second pixel value (22); the difference between the first pixel value (21) and the second pixel value (22) is an offset pixel value, the offset pixel value is equal to the drafting proportion between the first yarn layer and the second yarn layer, the drafting proportion is verified through the offset pixel value, and the driving device is used for controlling the offset pixel value to reach the set drafting proportion.
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| CN202111565302.XA CN114381846B (en) | 2021-12-20 | 2021-12-20 | Device and method for adjusting yarn layer position on double-layer creel for drafting machine |
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| CN202111565302.XA CN114381846B (en) | 2021-12-20 | 2021-12-20 | Device and method for adjusting yarn layer position on double-layer creel for drafting machine |
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| CN114381846B true CN114381846B (en) | 2023-05-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH683784A5 (en) * | 1991-09-17 | 1994-05-13 | Zellweger Uster Ag | Clamping device for a yarn layer and using the same. |
| CN110629373B (en) * | 2019-09-06 | 2020-11-10 | 深圳市海弘装备技术有限公司 | Adjusting mechanism and method for automatically adjusting edge layer difference of multilayer line screen |
| CN111676578A (en) * | 2020-07-12 | 2020-09-18 | 诸暨市捷速尔纺织机械有限公司 | Double-pan-head rack for drafting machine |
| CN212865150U (en) * | 2020-09-05 | 2021-04-02 | 永宁尔集团股份有限公司 | Warp surface alignment device of automatic drafting machine |
| CN214992183U (en) * | 2021-06-24 | 2021-12-03 | 深圳市海弘装备技术有限公司 | Adjustable mechanism of multilayer yarn |
| CN217077948U (en) * | 2021-12-20 | 2022-07-29 | 诸暨市捷速尔纺织机械有限公司 | Upper yarn layer position adjusting device of double-layer creel for drafting machine |
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