阅读说明：本技术 一种平板缠绕碳纤维纱用恒张力储纱装置及控制方法 (Constant-tension yarn storage device for flat-plate wound carbon fiber yarn and control method ) 是由 谈源 李春惠 谢亚峰 钮青 于 2021-10-08 设计创作，主要内容包括：本发明涉及储纱技术领域,尤其涉及一种平板缠绕碳纤维纱用恒张力储纱装置及控制方法,其装置包括：放卷装置,对纱筒上的纱线进行恒速放卷操作；展纤装置,对纱线进行展纤操作；张力检测装置,检测纱线的张力；收绕装置,进一步包括用于缠绕纱线的绕纱板和驱动电机,绕纱板在驱动电机的带动下匀速转动以将展纤完成的纱线进行收绕；其中,收绕装置和展纤装置之间还设置有自动储纱装置,自动储纱装置用于实时补偿放卷装置放纱量和绕纱板收纱量之间的差值,从而使纱线在通过展纤装置的速度和张力保持恒定,提高产品质量,具备实用性。(The invention relates to the technical field of yarn storage, in particular to a constant-tension yarn storage device for flat-plate winding of carbon fiber yarns and a control method, wherein the device comprises: the unwinding device is used for unwinding the yarn on the yarn drum at a constant speed; the fiber unfolding device is used for carrying out fiber unfolding operation on the yarns; a tension detection device for detecting the tension of the yarn; the winding device further comprises a yarn winding plate for winding yarns and a driving motor, and the yarn winding plate is driven by the driving motor to rotate at a constant speed so as to wind the yarns after fiber spreading; wherein, still be provided with automatic yarn device that stores up between receipts device and the fine device of exhibition, automatic yarn device that stores up is used for real-time compensation to put the package and place the difference between the yarn volume and the yarn volume is received around the yarn board to make the yarn keep invariable at the speed and the tension through the fine device of exhibition, improve product quality, possess the practicality.)

1. The utility model provides a dull and stereotyped winding carbon fiber yarn stores up yarn device with constant tension which characterized in that includes:

the unwinding device is used for unwinding the yarn on the yarn drum at a constant speed;

the fiber unfolding device is used for carrying out fiber unfolding operation on the yarns;

a tension detection device for detecting the tension of the yarn;

the winding device further comprises a yarn winding plate and a driving motor, wherein the yarn winding plate is used for winding yarns, and the yarn winding plate is driven by the driving motor to rotate at a constant speed so as to wind the yarns after fiber spreading;

and an automatic yarn storage device is arranged between the winding device and the fiber spreading device and is used for compensating the difference between the yarn placing amount of the unwinding device and the yarn collecting amount of the winding plate in real time, so that the speed and the tension of the yarn passing through the fiber spreading device are kept constant.

2. A constant tension yarn storage device for flat wound carbon fiber yarn as in claim 1 wherein said automatic yarn storage device compensates for the difference between the yarn depositing amount of said pay-off package and the yarn collecting amount of said winding plate by fast yarn storage or fast yarn release.

3. The constant tension yarn storage device for flat-wound carbon fiber yarns according to claim 2, wherein the automatic yarn storage device comprises a moving roller, a first guide roller, a second guide roller and a frame, the moving roller is driven by a linear module to reciprocate along a straight line, the moving roller is positioned in the frame, the stroke range of the moving roller is not more than the edge of the frame, the first guide roller is installed on the frame near one side of the fiber spreading device, the second guide roller is installed on the frame near one side of the winding device, and the yarns are sequentially wound through the moving roller, the first guide roller and the second guide roller.

4. A constant tension yarn storage device for flat-wound carbon fiber yarn as claimed in claim 3, wherein the yarn between said fiber spreading device and said moving roller, the yarn between said moving roller and said first guide roller, and the yarn between said first guide roller and said second guide roller are kept horizontal.

5. A constant tension yarn storage device for flat-wound carbon fiber yarn as claimed in claim 3, wherein said tension detecting means is mounted on said first guide roller.

6. A constant tension yarn storage device for flat-wound carbon fiber yarn as claimed in claim 3, wherein the height of the yarn wound around the bottom of said second guide roller coincides with the height of the rotation axis of said winding plate.

7. The constant-tension yarn storage device for flat-wound carbon fiber yarns according to claim 1, wherein an angular displacement sensor is further arranged on one side of the yarn winding plate and used for measuring the rotation angle of the yarn winding plate in real time.

8. A constant-tension yarn storage control method for flat-plate wound carbon fiber yarns is characterized by comprising the following steps of:

s1: the unwinding device is adopted to perform constant-speed yarn unwinding on the yarn drum, and yarns on the yarn drum sequentially pass through the fiber unwinding device and the automatic yarn storage device and are finally wound on the yarn winding plate;

s2: setting the yarn collecting angular speed of the yarn winding plate, and calculating the real-time yarn collecting amount of the yarn winding plate by taking the rotation of the yarn winding plate by 180 degrees as a period;

s2: calculating the real-time yarn unwinding amount of the unwinding device by taking the 180-degree rotation of a yarn winding plate as a period, and solving the yarn unwinding angular speed of the unwinding device;

s3: calculating the real-time compensation amount of the automatic yarn storage device by calculating the difference value between the real-time yarn pay-off amount and the real-time yarn take-up amount, and setting parameters of the automatic yarn storage device according to the real-time compensation amount.

9. The constant-tension yarn storage control method for flat-wound carbon fiber yarn according to claim 8, wherein a real-time yarn take-up amount Δ L of the yarn winding plate is set, the real-time yarn take-up amount Δ L being obtained by the following formula,

ΔL=L₂-L₁ ；

L²=R²+（R+a）²-2R（R+a）；

wherein L is₂And L₁The yarn collecting amount of the yarn winding plate at two different angles is shown, R is half of the width of the yarn winding plate, a is the distance from the automatic yarn storage device to the yarn winding plate, and theta is the included angle between the yarn winding plate and the horizontal plane.

10. The constant-tension yarn storage control method for flat-wound carbon fiber yarn as claimed in claim 9, wherein the yarn unwinding angular velocity of said unwinding device is set to ω₀Said angular speed of unwinding ω₀Can be found by the following formula,

ω₀R₀t₀=2R ；

wherein R is₀Radius of the drum, t₀The time for one period of rotation of the winding plate is 2R, and the width of the winding plate is 2R.

Technical Field

The invention relates to the technical field of yarn storage, in particular to a constant-tension yarn storage device for flat-plate winding of carbon fiber yarns and a control method.

Background

The carbon fiber winding molding is to wind carbon fiber prepreg on a core mold according to a certain rule, and then obtain a product through curing and demolding. The method comprises wet winding, namely carbon fiber prepreg is directly wound on a core mold under the control of tension, redundant bubbles are extruded due to the winding tension, the winding rule can be designed according to the stress condition of a product in the carbon fiber winding forming process, the strength of the fiber is fully exerted, the cost is relatively low, the produced product is good in air tightness, and the mechanized and automatic production is easy to realize.

In the prior art, the core mold is mostly of a cylindrical structure, the tension control of the carbon fiber wound on the core mold is relatively easy, and the rotation speed of the core mold is controlled to be constant. However, when the core mold has a plate-shaped structure, due to the structural difference between the plate-shaped core mold and the cylindrical core mold, when the yarn after fiber spreading is wound by the plate-shaped core mold, the linear velocity of the yarn wound on the plate-shaped core mold is not uniform, and the tension of the yarn is difficult to control. In order to ensure the winding quality, the speed and the tension of the yarn in the fiber spreading area must be ensured to be relatively constant, and how to ensure the tension of the yarn to be relatively constant becomes a problem to be solved urgently.

In view of the above problems, the present inventors have actively studied and innovated based on the practical experience and professional knowledge of many years of engineering application of such products, and have developed a constant tension yarn storage device for flat-plate wound carbon fiber yarn and a control method thereof, so that the device has higher practicability.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the constant-tension yarn storage device for the flat-plate wound carbon fiber yarn and the control method thereof are provided, so that the tension of the yarn is relatively constant in the fiber spreading process.

In order to achieve the purpose, the invention adopts the technical scheme that: a dull and stereotyped winding carbon fiber yarn stores up yarn device with constant tension, includes:

the unwinding device is used for unwinding the yarn on the yarn drum at a constant speed;

the fiber unfolding device is used for carrying out fiber unfolding operation on the yarns;

a tension detection device for detecting the tension of the yarn;

the winding device further comprises a yarn winding plate and a driving motor, wherein the yarn winding plate is used for winding yarns, and the yarn winding plate is driven by the driving motor to rotate at a constant speed so as to wind the yarns after fiber spreading;

and an automatic yarn storage device is arranged between the winding device and the fiber spreading device and is used for compensating the difference between the yarn placing amount of the unwinding device and the yarn collecting amount of the winding plate in real time, so that the speed and the tension of the yarn passing through the fiber spreading device are kept constant.

Further, the automatic yarn storage device compensates for a difference between the yarn placing amount of the yarn releasing package and the yarn collecting amount of the yarn winding plate by rapidly storing the yarn or rapidly releasing the yarn.

Further, automatic yarn storage device is including removing roller, first guide roll, second guide roll and frame, it can follow straight reciprocating motion to remove the roller through sharp module drive, it is located to remove the roller in the frame and the stroke range does not exceed the edge of frame, first guide roll install near exhibition fine device one side on the frame, the second guide roll install near receive around device one side on the frame, the yarn is in proper order around the warp remove the roller first guide roll with the second guide roll.

Further, the yarn between the fiber spreading device and the moving roller, the yarn between the moving roller and the first guide roller, and the yarn between the first guide roller and the second guide roller are all kept horizontal.

Further, the tension detecting device is mounted on the first guide roller.

Further, the height of the yarn wound through the bottom of the second guide roller is consistent with the height of the rotating axis of the yarn winding plate.

Furthermore, an angular displacement sensor is further arranged on one side of the yarn winding plate and used for measuring the rotation angle of the yarn winding plate in real time.

A constant-tension yarn storage control method for flat-plate winding carbon fiber yarns comprises the following steps:

s1: the unwinding device is adopted to perform constant-speed yarn unwinding on the yarn drum, and yarns on the yarn drum sequentially pass through the fiber unwinding device and the automatic yarn storage device and are finally wound on the yarn winding plate;

s2: setting the yarn collecting angular speed of the yarn winding plate, and calculating the real-time yarn collecting amount of the yarn winding plate by taking the rotation of the yarn winding plate by 180 degrees as a period;

s2: calculating the real-time yarn unwinding amount of the unwinding device by taking the 180-degree rotation of a yarn winding plate as a period, and solving the yarn unwinding angular speed of the unwinding device;

s3: calculating the real-time compensation amount of the automatic yarn storage device by calculating the difference value between the real-time yarn pay-off amount and the real-time yarn take-up amount, and setting parameters of the automatic yarn storage device according to the real-time compensation amount.

Furthermore, the real-time yarn receiving amount of the yarn winding plate is set to be delta L, the real-time yarn receiving amount delta L is obtained through the following formula,

ΔL=L₂-L₁ ；

L²=R²+（R+a）²-2R（R+a）；

wherein L is₂And L₁The yarn collecting amount of the yarn winding plate at two different angles is shown, R is half of the width of the yarn winding plate, a is the distance from the automatic yarn storage device to the yarn winding plate, and theta is the included angle between the yarn winding plate and the horizontal plane.

Further, setting the yarn unwinding angular speed of the unwinding device to be omega₀Said angular speed of unwinding ω₀Can be found by the following formula,

ω₀R₀t₀=2R ；

wherein R is₀Radius of the drum, t₀The time for one period of rotation of the winding plate is 2R, and the width of the winding plate is 2R.

The invention has the beneficial effects that: the automatic yarn storing device is arranged between the fiber spreading device and the winding device and is used for compensating the difference between the yarn placing amount of the yarn releasing device and the yarn collecting amount of the yarn winding plate in real time, the average yarn collecting and winding speed is equal to the unwinding linear speed due to the fact that the total yarn releasing amount corresponds to the total yarn collecting amount, and one part of the yarn collecting and winding speed is smaller than the unwinding speed due to the fact that the real-time yarn collecting and winding speed is changed periodically from 0 to 0 in a maximum range, at the moment, the automatic yarn storing device performs yarn storing action and stores yarn rapidly, the other part of the yarn collecting and winding speed is larger than the unwinding speed, at the moment, the automatic yarn storing device performs yarn releasing action, and therefore yarn speed and tension in front and back of the fiber spreading device are kept constant, fiber spreading quality is improved, and practicability is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a constant tension yarn storage device for flat winding carbon fiber yarns in an embodiment of the present invention;

fig. 2 is a front view of a constant tension yarn storage device for flat winding a carbon fiber yarn according to an embodiment of the present invention.

Reference numerals: 1. an unwinding device; 2. a fiber spreading device; 3. a tension detection device; 4. a yarn winding plate; 5. a drive motor; 6. a moving roller; 7. a first guide roller; 8. a second guide roller; 9. a frame; 10. an angular displacement sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

The constant tension yarn storage device for flat winding carbon fiber yarn shown in fig. 1 to 2 includes:

the unwinding device 1 is used for unwinding yarns on a yarn drum at a constant speed;

the fiber unfolding device 2 is used for carrying out fiber unfolding operation on the yarns;

a tension detection device 3 for detecting the tension of the yarn;

the winding device further comprises a winding plate 4 for winding yarns and a driving motor 5, and the winding plate 4 is driven by the driving motor 5 to rotate at a constant speed so as to wind the yarns after fiber spreading;

wherein, still be provided with automatic yarn device that stores up between receipts are put and are opened fine device 2, and automatic yarn device that stores up is used for the difference between the real-time compensation unwinding device 1 pay-off volume and the 4 receipts yarn volumes of winding yarn board to make the yarn keep invariable at the speed and the tension through exhibition fine device 2, automatic yarn device that stores up compensates through quick storage yarn or quick release yarn and falls the difference between unwinding device 1 pay-off volume and the 4 receipts yarn volumes of winding yarn board.

The invention adopts the winding plate 4 to wind the yarn, which is different from the common circular mandrel type winding device, the winding speed is periodically changed from 0 to the maximum value to 0, the winding plate 4 rotates for 180 degrees for one period, if the yarn wound out from the fiber spreading device 2 is directly wound on the winding plate 4, the unwinding linear speed of the unwinding device 1 is constant, and the winding speed of the winding plate 4 is periodically changed, which can cause the linear speeds of the yarn before and after winding the fiber spreading device 2 to be inconsistent, so that the yarn at the fiber spreading device 2 can not keep constant tension, the fiber spreading effect is poor, in the application, an automatic yarn storing device is particularly arranged between the fiber spreading device 2 and the winding device, namely, the automatic yarn storing device is used for compensating the difference value between the yarn unwinding amount of the unwinding device 1 and the yarn collecting amount of the winding plate 4 in real time, and the total yarn unwinding amount and the total yarn collecting amount are corresponding, therefore, the average winding and unwinding speed is equal to the unwinding linear speed, and the real-time winding and unwinding speed is periodically changed from 0 to the maximum, so that a part of winding and unwinding speed is lower than the unwinding speed, the automatic yarn storage device performs yarn storage to quickly store yarns, the other part of winding and unwinding speed is higher than the unwinding speed, the automatic yarn storage device performs yarn unwinding to quickly discharge the stored yarns to prevent over-tightening of the yarns passing through the fiber unfolding device 2. The automatic yarn storage device disclosed by the invention is quick in real time response, the response speed is accurate to every second, and the yarn storage action or the yarn releasing action is quickly executed, so that the yarn speed and the tension of the yarn passing through the fiber spreading device 2 are kept constant, and the technical effect is remarkable.

More specifically, in order to realize quick response for the automatic yarn storage device, the automatic yarn storage device comprises a moving roller 6, a first guide roller 7, a second guide roller 8 and a frame 9, the moving roller 6 can reciprocate linearly through linear module driving, the moving roller 6 is positioned in the frame 9, the stroke range of the moving roller is not more than the edge of the frame 9, the first guide roller 7 is installed on the frame 9 close to one side of the fiber spreading device 2, the second guide roller 8 is installed on the frame 9 close to one side of the winding device, and yarns sequentially wind through the moving roller 6, the first guide roller 7 and the second guide roller 8.

The principle of the automatic yarn storage device provided by the invention is similar to that of a movable pulley block, and as shown in fig. 2, the movable roller 6 moves close to or away from the fiber spreading device 2 to realize quick yarn storage or quick yarn release of the automatic yarn storage device.

As a preferable example of the above embodiment, in order to calculate the moving distance of the moving roller 6, the yarn between the fiber spreading device 2 and the moving roller 6, the yarn between the moving roller 6 and the first guide roller 7, and the yarn between the first guide roller 7 and the second guide roller 8 are all kept horizontal, as shown in fig. 2, with reference to the calculation manner of the movable pulley group, the yarn shuttling between the above components is horizontal, and the moving roller 6 is a slidable component, similar to the movable pulley, so that the moving distance of the moving roller 6 is half of the yarn compensation amount.

In order to feed back the tension of the yarn in real time, the tension detecting device 3 is mounted on the first guide roller 7.

In order to calculate the length of the yarn between the second guide roller 8 and the yarn winding plate 4 conveniently, the height of the yarn wound at the bottom of the second guide roller 8 is consistent with the height of the rotation axis of the yarn winding plate 4, and through the arrangement, the length of the yarn between the bottom of the second guide roller 8 and the yarn winding plate 4 can be reflected by directly measuring the distance between the bottom of the second guide roller 8 and the yarn winding plate 4.

In order to feed back the real-time yarn receiving amount, an angular displacement sensor 10 is further arranged on one side of the yarn winding plate 4, the angular displacement sensor 10 is used for measuring the rotation angle of the yarn winding plate 4 in real time, the included angle between the yarn winding plate 4 and the horizontal plane is fed back in real time through the angular displacement sensor 10, the yarn receiving amount changes in a 0-periodic mode due to the fact that the yarn receiving and winding speed changes in a 0-periodic mode, and corresponding parameter setting can be carried out on the automatic yarn storage device according to the rule.

Example two

The invention also discloses a constant-tension yarn storage control method for the flat-plate wound carbon fiber yarn,

s1: the unwinding device 1 is adopted to perform constant-speed yarn unwinding on the yarn drum, and the yarn on the yarn drum sequentially passes through the fiber unwinding device 2 and the automatic yarn storage device and is finally wound on the yarn winding plate 4;

s2: setting the yarn collecting angular speed of the yarn winding plate 4, and calculating the real-time yarn collecting amount of the yarn winding plate 4 by taking the rotation of the yarn winding plate 4 by 180 degrees as a period;

s2: calculating the real-time yarn unwinding amount of the unwinding device 1 by taking the 180-degree rotation of the yarn winding plate 4 as a period, and calculating the yarn unwinding angular speed of the unwinding device 1;

s3: calculating the real-time compensation amount of the automatic yarn storage device by calculating the difference value between the real-time yarn pay-off amount and the real-time yarn take-up amount, and setting parameters of the automatic yarn storage device according to the real-time compensation amount.

The real-time yarn receiving amount of the yarn winding plate 4 is set to be delta L, the real-time yarn receiving amount delta L is calculated by the following formula,

ΔL=L₂-L₁ ；

L²=R²+（R+a）²-2R（R+a）；

wherein L is₂And L₁The yarn collecting amount of the yarn winding plate 4 at two different angles is shown, R is half of the width of the yarn winding plate 4, a is the distance from the automatic yarn storage device to the yarn winding plate 4, and theta is the included angle between the yarn winding plate 4 and the horizontal plane.

Setting the unwinding angular velocity of the unwinding device 1 to ω₀Angular speed omega of yarn unwinding₀Can be found by the following formula,

ω₀R₀t₀=2R ；

wherein R is₀Radius of the drum, t₀The time for one period of rotation of the winding board 4 is 2R, and the width of the winding board 4 is 2R.

The specific implementation mode of the scheme is as follows:

first, the yarn take-up angular velocity of the winding plate 4 is set to ω₁The yarn winding plate 4 is horizontally placed as an initial state, the yarn winding plate 4 rotates 180 degrees as a period, and the formula t is obtained₁=1/ω₁The time t for every 1 DEG rotation of the winding plate 4 can be determined₁The auxiliary lines shown in FIG. 2 are determined by the cosine theorem L²=R²+（R+a）²-2R（R+a）The length of the yarn collecting amount L corresponding to any angle theta can be calculated through a formula delta L = L₂-L₁ To calculate the real-time yarn collecting amount of the yarn winding plate 4 rotating through different angles, and the yarn winding plate 4 rotates 180 degrees as a period by adopting a formula omega₀R₀t₀=2R to determine the unwinding angular velocity ω of the unwinding device 1₀Wherein t is₀=180 t₁，t₀Corresponding to the time taken for the winding plate 4 to rotate through 180 deg., so willFormula t₁=1/ω₁Substituted into ω₀R₀t₀The angular speed omega of yarn discharge can be obtained in the value of =2R₀=2Rω₁/180 R₀，R₀The radius of the drum can be measured directly, the width of the winding plate 4 can be measured directly for 2R, and the angular speed omega of the yarn unwinding can be determined since the drum is circular₀So t₁The real-time yarn discharging amount discharged from the yarn barrel at the time interval can be obtained, and the real-time yarn discharging amount is set to be L₃The real-time yarn discharge quantity L can be obtained₃=ω₀R₀ t₁The real-time compensation amount of the automatic yarn storage device is calculated by calculating the difference value between the real-time yarn releasing amount and the real-time yarn receiving amount, the conclusion can be obtained through the calculation thought, the real-time compensation amount of the automatic yarn storage device corresponds to the rotation of the winding plate 4 at different angles, so that an angular displacement sensor 10 is required to be arranged on one side of the winding plate 4, and the angular displacement sensor 10 is used for measuring the rotation angle of the winding plate 4 in real time.

The control method provided by the invention can accurately feed back the real-time yarn collecting amount when the yarn winding plate 4 rotates by 1 degree, further obtain the real-time compensation amount, realize quick compensation according to the angle of the yarn winding plate 4 by the automatic yarn storage device, is correspondingly quick, has high compensation accuracy and real-time performance, ensures the constant speed and tension of the yarn passing through the fiber spreading device 2, and has remarkable progress.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.