CN103112740A - Winding machine and method of controlling winding of flexible material - Google Patents

Abstract

The invention discloses a winding machine and a method of controlling winding of flexible material and belongs to the technical field of material processing. The winding machine comprises a winding up roller, a delivery roller, a motor, a controller, a first distance measuring unit and a second distance measuring unit, wherein the winding up roller is driven by the motor, the first distance measuring unit is arranged on the upper portion or the lower portion between the delivery roller and the winding up roller, the second distance measuring unit is arranged outside the winding up roller and is directed on the outer cylindrical surface of the winding up roller, and the controller is respectively connected with the first distance measuring unit and the second distance measuring unit and controls the set rotating speed of the motor. The tension of the flexible material is close to zero and almost no tension fluctuates, and therefore the winding machine can finish the micro-tension winding or zero-tension winding of the materials with high quality.

Description

Winding machine and method for controlling winding of flexible material

Technical Field

The invention relates to the technical field of material processing, in particular to a winding machine and a method for controlling winding of a flexible material.

Background

The winding machine is an efficient device in flexible material winding processing, and the existing winding machine mainly comprises a tension measuring roller, a winding roller and a controller, wherein the tension measuring roller is an important part for controlling the tension of a flexible material, the tension measuring roller sends a signal to the controller according to the tension and the change of the tension, and the controller controls the rotating speed of a motor so as to adjust the speed of winding the flexible material by the winding roller, so that the tension is a fixed value after the flexible material is wound.

In practical situations, when the material is required to be wound by "micro tension" or "zero tension", the friction force of the winding roller is far larger than the tension force of the flexible material, and the tension force required to be measured is far smaller than the gravity of the tension measuring roller, so that the type selection of the tension sensor is difficult, and the measurement has a large error. Therefore, the tension measuring roller is used for regulating the tension force inaccurately, the tension fluctuation of the flexible material is large, and the existing winding machine cannot complete the winding of the material with micro tension or zero tension.

Disclosure of Invention

Technical problem to be solved

The technical problem to be solved by the invention is as follows: how to solve the problem that the tension is not accurate when the existing winding machine controls the winding of micro tension or zero tension, and the tension fluctuation of the flexible material is large.

(II) technical scheme

In order to solve the above technical problem, the present invention provides a winding machine, including: the winding roll is driven by the motor, the first distance measuring unit is located above or below the conveying roll and between the winding roll, the second distance measuring unit is located outside the winding roll and aligned to the outer cylindrical surface of the winding roll, and the controller is connected with the first distance measuring unit and the second distance measuring unit respectively and controls the set rotating speed of the motor.

The first distance measuring unit is located below the position between the conveying roller and the winding roller, and the second distance measuring unit is located right below the winding roller.

The controller is one of a single chip microcomputer, a programmable logic controller and a central processing unit.

The first distance measuring unit is an ultrasonic distance measuring sensor or a laser sensor.

The second distance measuring unit is an ultrasonic distance measuring sensor or a laser sensor.

The invention also discloses a method for controlling the winding of the flexible material by using the winding machine, which comprises the following steps:

s1, conveying a flexible material by a conveying roller, wherein the tail end of the flexible material is wound on a winding roller;

s2, the first distance measuring unit obtains a first distance between the flexible material and forwards the first distance to the controller, and the second distance measuring unit obtains a second distance between the flexible material and the lowest end of the winding roller and forwards the second distance to the controller;

and S3, the controller calculates and adjusts the set rotating speed of the motor according to the received first distance and the second distance so that the flexible material forms a flexible material suspension section between the conveying roller and the winding roller and keeps the suspension section at the set distance from the first distance measuring unit.

In step S3, the winding tension of the flexible material is adjusted to a desired tension by adjusting the set distance of the first distance measuring unit.

The controller calculates the set rotating speed of the motor by adopting a proportional integral method.

The calculation formula for calculating the set rotating speed of the motor by the proportional integral method is as follows:

n_{electric machine}=n_set×j

Wherein n is_set=n_D+n_pi(t); $n_D=\frac{V_0}{2\mathrm{\π}\×(L_0-L_x+R)};$ $n_{\mathrm{pi}\left(t\right)}=\mathrm{Kp}[e\left(t\right)+\frac{1}{\mathrm{Ti}}\∫e\left(t\right)\mathrm{dt}];$ e=H-H_x；n_{Electric machine}Setting the rotating speed of the motor; n is_setJ is the set rotating speed of the winding roller, and j is the rotating speed ratio of the motor and the winding roller; kp is a proportional amplification coefficient; ti is an integral time constant; r is the radius of the winding roller when the winding roller is empty; l is₀Is the measured value of the second distance measuring unit when the winding roller is empty; l is_xIs the current second distance; v₀A speed of conveying the flexible material to the conveying rollers; h is a set distance between the first ranging unit and the flexible material overhanging section; h_xIs the current first distance.

After the step S3 is executed, the process returns to the step S2 until the winding roller completes winding.

(III) advantageous effects

The winding machine provided by the invention cancels a tension measuring roller in the prior art, adopts a conveying roller to convey the flexible material to enable the tension of the flexible material to be close to zero, and controls the winding speed of the winding roller by monitoring the radius of the winding shaft and the position change of the suspension section of the flexible material, so that the flexible material is almost free from tension fluctuation when being wound, and the winding of the flexible material with micro tension or zero tension can be finished with high quality.

Drawings

Fig. 1 is a schematic structural view of a winding machine according to an embodiment of the present invention.

Fig. 2 is a flow chart of a method for controlling winding of a flexible material by using the winding machine in fig. 1.

Wherein: 1. a conveying roller; 2. a winding roller; 3. a motor; 4. a controller; 5. a first ranging unit; 6. a second ranging unit; 7. a depending section of flexible material; 8. a flexible material.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

FIG. 1 is a schematic structural view of a winder according to one embodiment of the present invention; referring to fig. 1, the winding machine of the present embodiment includes: conveying roller 1, winding up roller 2, motor 3, controller 4, first range unit 5 and second range unit 6, conveying roller 1 is used for carrying flexible material, first range unit 5 is located the below between conveying roller 1 and the winding up roller 2, and the distance of first range unit 5 and conveying roller 1 and winding up roller 2 can be 20~50cm in vertical direction, second range unit 6 is located winding up roller 2 under, and the distance can be 20~50 cm. The winding roller 2 is driven by a motor 3, and the controller 4 is respectively connected with a first distance measuring unit 5 and a second distance measuring unit 6 and controls the set rotating speed of the motor 3.

Preferably, the controller 4 is one of a single chip microcomputer, a programmable logic controller and a central processing unit.

Preferably, the first distance measuring unit 5 and the second distance measuring unit 6 are both sensors such as ultrasonic distance measuring sensors or laser distance measuring sensors, which can be used for distance measurement. .

FIG. 2 is a flow chart of a method for controlling the winding of a flexible material using the winder of FIG. 1; referring to fig. 2, the method includes:

s1, conveying the flexible material 8 by the conveying roller 1, and winding the tail end of the flexible material 8 on the winding roller 2;

s2, the first distance measuring unit 5 obtains a first distance between the flexible material 8 and the flexible material and forwards the first distance to the controller 4, and the second distance measuring unit 6 obtains a second distance between the flexible material and the lowest end of the winding roller 2 and forwards the second distance to the controller 4;

s3, the controller 4 calculates and adjusts the set rotation speed of the motor 3 according to the received first distance and second distance, so that the flexible material 8 forms a flexible material suspended section 7 between the delivery roller 1 and the winding roller 2, and the flexible material suspended section 7 is kept at a fixed distance from the first distance measuring unit 5, which may be 20-50 cm. The formula for calculating the set rotation speed of the motor 3 is:

n_{electric machine}=n_set×j

Wherein n is_set=n_D+n_pi(t); $n_D=\frac{V_0}{2\mathrm{\π}\×(L_0-L_x+R)};$ $n_{\mathrm{pi}\left(t\right)}=\mathrm{Kp}[e\left(t\right)+\frac{1}{\mathrm{Ti}}\∫e\left(t\right)\mathrm{dt}];$ e=H-H_x；n_{Electric machine}The set rotating speed of the motor 3; n is_setJ is the set rotating speed of the winding roller 2 and is the rotating speed ratio of the motor 3 and the winding roller 2; kp is a proportional amplification coefficient; ti is an integral time constant; r is the radius of the winding roller 2 when the winding roller is empty; l is₀Is the measured value of the second distance measuring unit 6 when the winding roller 2 is empty; l is_xIs the current second distance; v₀The speed at which the flexible material 8 is conveyed for the conveyor roller 1; h is a set distance between the first distance measuring unit 5 and the flexible material overhanging section 7; h_xIs the current first distance.

By the control method, when the flexible material 8 wound by the winding roller 2 is more and the radius is larger, the rotating speed of the motor 3 is reduced to keep the winding linear speed of the winding roller 2 unchanged. When the distance H between the overhanging section 7 and the first distance measuring unit 5 becomes larger, which means that the winding linear speed of the winding roller 2 is too fast, the controller 4 will adjust the motor 3 to decelerate after receiving the signal, otherwise, accelerate until the distance H returns to the set value.

Preferably, in step S3, the set distance H of the first distance measuring unit 5 is adjusted to make the winding tension of the flexible material 8 reach the required "micro tension", and if the winding tension is to be increased, the set distance H is decreased to make the flexible material 8 of the overhanging section 7 more, and gravity is added to stretch the flexible material 8. Otherwise, the winding tension can be reduced.

Preferably, after step S3 is executed, the process returns to step S2 until the winding roller 2 finishes winding.

The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.

Claims (10)

1. A winding machine, characterized in that it comprises: the winding roll comprises a winding roll body, a conveying roll, a motor, a controller, a first distance measuring unit and a second distance measuring unit, wherein the winding roll body is driven by the motor, the first distance measuring unit is located on the conveying roll body and above or below the winding roll body, the second distance measuring unit is located on the outer side of the winding roll body and aligned to the outer cylindrical surface of the winding roll body, and the controller is connected with the first distance measuring unit and the second distance measuring unit respectively and controls the rotating speed of the motor.

2. The winder of claim 1, wherein the first distance measuring unit is located below between the delivery roller and the winding roller, and the second distance measuring unit is located directly below the winding roller.

3. The winding machine according to claim 1 or 2, wherein the controller is one of a single chip microcomputer, a programmable logic controller and a central processing unit.

4. A winder as claimed in claim 1 or 2, characterised in that the first distance measuring unit is an ultrasonic distance measuring sensor or a laser distance measuring sensor.

5. A winder as claimed in claim 1 or 2, characterised in that the second distance measuring unit is an ultrasonic distance measuring sensor or a laser distance measuring sensor.

6. A method of controlling the winding of a flexible material using a winder according to any of claims 2 to 5, the method comprising:

s1, conveying a flexible material by a conveying roller, wherein the tail end of the flexible material is wound on a winding roller;

s2, the first distance measuring unit obtains a first distance between the flexible material and forwards the first distance to the controller, and the second distance measuring unit obtains a second distance between the flexible material and the lowest end of the winding roller and forwards the second distance to the controller;

and S3, the controller calculates and adjusts the set rotating speed of the motor according to the received first distance and the second distance so that the flexible material forms a flexible material suspension section between the conveying roller and the winding roller and keeps the flexible material suspension section at the set distance from the first distance measuring unit.

7. The method for controlling winding of flexible material according to claim 6, wherein in step S3, the winding tension is adjusted to a desired tension by adjusting the set distance between the flexible material and the first distance measuring unit.

8. The method for controlling winding of a flexible material as in claim 6, wherein the controller calculates the set rotational speed of the motor by a proportional-integral method.

9. The method for controlling winding of the flexible material according to claim 8, wherein the calculation formula for calculating the set rotating speed of the motor by the proportional integral method is as follows:

n_{electric machine}=n_set×j

Wherein, $n_{\mathrm{set}}=n_D+n_{\mathrm{pi}\left(t\right)}{;n}_D=\frac{V_0}{2\mathrm{\π}\×(L_0-L_x+R)};$ $n_{\mathrm{pi}\left(t\right)}=\mathrm{Kp}[e\left(t\right)+\frac{1}{\mathrm{Ti}}\∫e\left(t\right)\mathrm{dt}];$ e=H-H_x；n_{electric machine}Setting the rotating speed of the motor; n is_setJ is the set rotating speed of the winding roller, and j is the rotating speed ratio of the motor and the winding roller; kp is a proportional amplification coefficient; ti is an integral time constant; r is the radius of the winding roller when the winding roller is empty; l is₀Is the measured value of the second distance measuring unit when the winding roller is empty; l is_xIs the current second distance; v₀A speed of conveying the flexible material to the conveying rollers; h is a set distance between the first ranging unit and the flexible material overhanging section; h_xIs the current first distance.

10. The method for controlling the winding of the flexible material according to any one of claims 6 to 9, wherein after the step S3 is executed, the step S2 is directly returned until the winding roller finishes winding.

Images