CN102311009A - Active tension control method - Google Patents

Abstract

The invention relates to an active tension regulation and control method, which regulates and controls the torque of a tension swinging wheel set so as to control the tension sensing wheel to measure that the tension of a film material is close to a tension set value, regulates and controls the rotating speed and the torque of the tension swinging wheel set so as to enable the linear velocity of the movement of the tension swinging wheel set to be close to a half of the linear velocity of a feeding wheel, and the tension sensing wheel to measure that the tension of the film material is still close to the tension set value, and then repeatedly discharges and feeds the film material. The active tension regulation and control method can solve the problem of uneven tension caused by continuous and discontinuous motion of the feeding wheel, the tension swinging wheel set and the feeding wheel.

Description

Active tension control method

technical field

The invention relates to a tension control method, in particular to an active tension control method, which can solve the uneven tension phenomenon caused by the stop-and-go of the feeding wheel, the tension swing wheel set and the feeding wheel.

Background technique

The film is a film material, so when the film roll-to-roll process is processed, the film material is mostly conveyed to a feed wheel by a discharge wheel, and there is a tension swinging wheel set between the discharge wheel and the feed wheel. The film maintains a certain tension during conveying and processing. However, in the roll-to-roll process of film materials, such as continuous but intermittent transmission similar to screen printing, the frequent start and stop of the feed wheel often causes inertia between the feed wheel and the tension swing wheel set. And cause sloshing, which in turn affects the phenomenon of unstable tension of the film material, and finally affects the processing quality.

In the prior art, the position of the tension oscillating wheel set is used to feed back the current change value of the film tension, and then coordinate calculation and control the speed of the unwinding motor to match the speed of the feeding motor. For example, take the Japanese patent JP2007-045567, which can feedback the current tension change situation through the position of the tension swing wheel group, and actively control the motor speed of the discharge wheel according to the feedback tension change, and this proposal increases the acceleration and deceleration of the speed change Torque control to reduce inertial effects when starting and stopping. However, this patent uses the unwinding wheel to control the tension, so the diameter and weight of the current roll must be considered, so the response of the machine is slow, so it is only suitable for continuous production lines. The tension change still has a time constant relationship, and there is no active energy provided on the tension swing wheel set to offset the vibration, so it can only be regarded as a semi-active control.

In addition, such as US Patent No. US06314333, it uses a servo motor to drive the pulley, and then the pulley drives the tension swing wheel group to move up and down. The movement of the servo motor takes into account the rotational inertia of the pulley and the inertia of the roller, and can keep the movement smooth during tension control. , and the previous proposal takes into account the friction force, the change of tension, and the change of the acceleration of the roller, and then calculates the size of the reaction force, and then uses this reaction force to offset the shaking of the tension swing wheel set. Therefore, the previous proposal must combine various The variation of the film is measured to calculate the acceleration and deceleration values that the tension swing wheel set should reflect. Finally, the equation of motion is derived using Newton's second law to deduce how much force should be generated to compensate or offset when the film produces tension changes. However, the structure of the previous proposal is too complicated, because the elastic strain and mechanical loss of the wire itself when there are multiple sets of pulleys, the influence of the rotational moment of inertia of the pulleys is more complicated than that of the film itself, and the previous proposal uses the reaction force to offset the tension of the swing wheel set. Shaking, if the material of the material is changed, or the operating conditions of the machine are different, errors will occur and must be re-calibrated. This reduces the efficiency of thin film material processing.

Therefore, there is a need to provide an active tension control method that can solve the aforementioned shortcomings.

Contents of the invention

The purpose of the present invention is to provide an active tension control method, which can solve the phenomenon of uneven tension caused by the stop-and-go of the feeding wheel, the tension swing wheel set and the feeding wheel.

In order to achieve the above object, the present invention is an active tension control method comprising the following steps:

(a) Provide a conveying device for film material, the conveying device includes a discharge wheel, a tension swing wheel set, a tension sensing wheel and a feed wheel, the film material passes through the discharge wheel, the tension swing in sequence wheel set, the tension sensing wheel and the feed wheel;

(b) regulating the torque of the tension swing wheel set, so that the tension of the film material measured by the tension sensing wheel is close to a tension setting value;

(c) Regulate the rotational speed and torque of the tension oscillating wheel set so that the linear velocity of the tension oscillating wheel set is close to half of the linear velocity of the feeding wheel, and the tension sensing wheel measures the tension of the film material as the tension setting; and

(d) Repeat step (b) and step (c).

In the present invention, wherein in step (b), the oscillating wheel of the tension oscillating wheel set is driven to move from a first position to a second position, and the second position of the oscillating wheel of the tension oscillating wheel set is determined by the transmission device determined by a position sensor.

In the present invention, in the step (b), the discharge wheel and the tension swing wheel set are driven.

In the present invention, in the step (b), the torque of the tension oscillating wheel set is regulated according to the difference between the tension measurement value of the film material and the tension setting value.

In the present invention, in the step (c), the tension oscillating wheel set is driven to return from the second position to the first position, and the first position of the tension oscillating wheel set is determined by the angular displacement of the feeding wheel.

In the present invention, in the step (c), the feeding wheel and the tension swing wheel set are driven.

In the present invention, in step (c), the rotational speed of the tension oscillating wheel set is regulated according to the difference between the measured value of the linear velocity of the feeding wheel and the measured value of the linear velocity of the tension oscillating wheel set, and according to The difference between the tension measurement value of the film material and the tension setting value is used to regulate the torque of the tension swing wheel set.

The present invention has beneficial effects: in the active tension control method of the present invention, in the discharging step, the tension of the film material measured by the tension sensing wheel is close to a tension setting value; in the feeding step, The linear velocity of the tension oscillating wheel set is close to half of the linear velocity of the feeding wheel, and the tension of the film material measured by the tension sensing wheel is still close to the tension setting value. Therefore, the active tension control method of the present invention can solve the non-uniform tension phenomenon caused by the stop-and-go of the feeding wheel, the tension swing wheel set and the feeding wheel. Furthermore, the feeding and feeding control mode of the servo motor of the tension oscillating wheel set can effectively reduce the influence of the inertial inertia of the oscillating wheel itself in the active area of the tension oscillating wheel, greatly reduce the shaking of the film material, and make the film material more smoothly. send.

Description of drawings

FIG. 1A is a schematic structural view of a conveying device for a film material in a preferred embodiment of the present invention, which shows the step of discharging the film material;

FIG. 1B is a schematic structural view of a conveying device for film materials in a preferred embodiment of the present invention, which shows standby;

Fig. 1C is a schematic structural view of the conveying device of the film material in a preferred embodiment of the present invention, which shows the feeding steps of the film material; and

Fig. 2 is a flow chart of the active tension control method of a preferred embodiment of the present invention; and

Fig. 3 is a schematic structural view of a conveying device for film material according to another preferred embodiment of the present invention.

[Simple description of figure number]

10 film material 20 feeding wheel

30 tension swing wheel set 31 swing wheel

32 Driving wheel 33 Position sensor

40 Feeding wheel 42 Proportional frequency regulator

60 tension sensing wheel 100 transmission device

C21 Torque Controller

C22 speed controller E2 encoder

E3 Encoder M1 Servo Motor

M2 Servo Motor M3 Servo Motor

Detailed ways

In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:

Please refer to FIG. 1A , FIG. 1B and FIG. 1C , which are schematic diagrams of the operation of a conveying device for film materials (such as a screen printing conveying device for roll-to-roll process). Please also refer to FIG. 2 , which is a schematic diagram of the steps of the active tension control method; as shown in the figure, the active tension control method of the present invention is used in a conveying device 100 of the film material 10 . The conveying device 100 of the film material 10 is applied in an intermittent continuous feeding process (that is, the continuous film material is fed intermittently), such as the conveying device 100 of the film material 10 can be a screen printing conveying device for a roll-to-roll process , solar panel electrode printing transfer device, FPCB (flexible printed circuit board) continuous exposure machine, etc. When performing intermittent continuous feeding, it can greatly reduce the undue change of film tension caused by inertia. The conveying device 100 of the film material 10 includes a feeding wheel 20 , a tension swing wheel set 30 , a tension sensing wheel 60 and a feeding wheel 40 . The film material 10 passes through the discharge wheel 20 , the tension swing wheel set 30 , the tension sensing wheel 60 and the feeding wheel 40 in sequence.

The active tension control method of the present invention includes the following steps: firstly, step S1 is performed to command start, and then step S2 is performed to set the control mode of the servo motor M2 to the discharge control mode. The servo motor M1 and the servo motor M2 drive the discharging wheel 20 and the tension swing wheel set 30 respectively, and the torque of the tension swing wheel set 30 is regulated by the servo motor M2 to perform the discharging step of the film material 10 (Fig. 1A). In the discharging step, the tension of the film material 10 measured by the tension sensing wheel 60 is close to a tension setting value (for example, the tension of the tension sensing wheel 60 is 6Kgf, and the tension of the film material 10 is 3Kgf). In step S2, a torque controller C21 regulates the torque of the tension swing wheel set 30 with the servo motor M2 according to the difference between the tension measurement value of the film material 10 and the tension setting value. The torque of the tension oscillating wheel set 30 multiplied by the radius of the tension oscillating wheel set 30 is the tension of the tension oscillating wheel set 30 . In step S2, the swing wheel 31 of the tension swing wheel set 30 moves from a first position to a second position. The second position of the swing wheel 31 of the tension swing wheel set 30 is determined by a position sensor 33 of the transmission device 100 . When the position sensor 33 detects that the swing wheel 31 of the tension swing wheel set 30 reaches the second position, the servo motor M1 and the servo motor M2 stop driving the discharge wheel 20 and the tension swing wheel set 30 respectively.

Go to step S3, standby (as shown in FIG. 1B ), and wait for the feeding order of the film material 10 . If the feeding command is obtained, proceed to step S4, and switch the control mode of the servo motor M2 from the discharging control mode to the feeding control mode. Then, the servo motor M3 and the servo motor M2 drive the feeding wheel 40 and the tension swing wheel set 30 respectively, and the rotation speed and torque of the tension swing wheel set 30 are regulated by the servo motor M2 to feed the film material 10 step (Fig. 1C). In the feeding step, the linear velocity V21 of the tension oscillating wheel set 30 is close to half of the linear velocity V31 of the feeding wheel 40 (that is, the linear velocity V22 of the film material 10 at the tension oscillating wheel set 30 is close to that of the film material 10 at the linear velocity V32 of the feeding wheel 40), and the tension of the film material 10 measured by the tension sensing wheel 60 is still close to the tension setting value (for example, the tension of the tension sensing wheel 60 is 6Kgf, and the tension of the film material 10 The tension is 3Kgf).

In step S4, a rotational speed controller C22 regulates the tension oscillating wheel set with the servo motor M2 according to the difference between the measured value of the linear velocity V3 of the feeding wheel 40 and the measured value of the linear velocity V2 of the tension oscillating wheel set 30 30 rpm. The measured value signal of the linear velocity V3 of the feeding wheel 40 can be sent to the rotational speed controller C22 through a synchronous controller (such as a proportional frequency regulator 42 ). A speed setting value can also be sent to the speed controller C22 at the same time, and compared with the measured value of the linear velocity V31 of the feeding wheel 40 and the measured value of the linear velocity V21 of the tension swing wheel set 20, in this embodiment In , the speed setting value is 0. The measured value of the linear velocity V3 of the feed wheel 40 is the rotational speed measured by the encoder E3 multiplied by the radius of the feed wheel 40, and the measured value of the linear velocity V2 of the tension oscillating wheel set 30 is obtained by the encoder E2 The measured rotational speed is multiplied by the radius of the drive wheel 32 of the tension oscillating wheel set 30 . Moreover, the torque controller C21 regulates the torque of the tension swing wheel set 30 by the servo motor M2 according to the difference between the tension measurement value of the film material 10 and the tension setting value. In step S4, the oscillating wheel 31 of the tension oscillating wheel set 30 returns from the second position to the first position. The first position of the swing wheel 31 of the tension swing wheel set 30 is determined by the angular displacement and radius of the feeding wheel 40 . Converting the number of revolutions measured by the encoder E3 into the angular displacement of the feeding wheel 40 , and then multiplying it by the radius of the feeding wheel 40 , the moving distance of the film material 10 can be obtained. When the moving distance of the film material 10 is equal to twice the distance between the second position and the first position, the servo motor M3 and the servo motor M2 stop driving the feeding wheel 40 and the tension swing wheel set 30 respectively.

Proceed to step S5 , repeating the steps of discharging the film material 10 , standby preparation and feeding the film material 10 , so as to convey the film material 10 intermittently and continuously. After the processing of the film material 10 is completed, proceed to step S6, and the command ends.

Please refer to Fig. 3, which is a structural schematic diagram of a conveying device of film material in another preferred embodiment of the present invention; as shown in the figure, the difference between this embodiment and the embodiment of Fig. different. In the embodiment shown in FIGS. 1A-C , the movement mode of the tension oscillating wheel set 30 is horizontal movement. In the embodiment of FIG. 3 , the movement mode of the tension swing wheel set 30 is vertical movement.

In summary, in the active tension control method of the present invention, in the discharging step, the tension of the film material measured by the tension sensing wheel is close to a tension set value; in the feeding step, the tension oscillating wheel The line speed of the set is close to the line speed of the feeding wheel, and the tension of the film material measured by the tension sensing wheel is still close to the tension setting value. Therefore, the unwinding and feeding control mode of the servo motor of the tension swing wheel set can effectively reduce the influence of the inertia of the swing wheel itself in the active area of the tension swing wheel, greatly reduce the shaking of the film material, and make the film material can be conveyed more smoothly.

In summary, it is only a preferred embodiment of the present invention, and is not intended to limit the implementation scope of the present invention. All equivalent changes and Modifications should be included within the scope of the claims of the present invention.

Claims (7)

1. an active tension force regulate and control method is characterized in that, comprises the following step:

(a) conveyer of a membraneous material is provided, this conveyer comprises blowing wheel, a tension force swing wheels, a tension sense measuring wheel and a drawing-inroller, and this membraneous material is in regular turn through this blowing wheel, this tension force swing wheels, this tension sense measuring wheel and this drawing-inroller;

(b) regulate and control the torque that this tension force is swung wheels, the tension force that makes this tension sense measuring wheel measure this membraneous material approaches a tension force setting value;

(c) regulate and control the rotating speed and the torque of this tension force swing wheels, make the linear velocity of these tension force swing wheels approach linear velocity half the of this drawing-inroller, and the tension force that this tension sense measuring wheel measures this membraneous material is in this tension force setting value; And

(d) carry out step (b) and step (c) repeatedly.

2. active tension force regulate and control method as claimed in claim 1; It is characterized in that; Wherein in step (b); The wabble wheel that orders about these tension force swing wheels moves to a second place from a primary importance, and the second place of the wabble wheel of these tension force swing wheels is determined by a position transduser of this conveyer.

3. active tension force regulate and control method as claimed in claim 1 is characterized in that, wherein in step (b), drives this blowing wheel and this tension force swing wheels.

4. active tension force regulate and control method as claimed in claim 1 is characterized in that, wherein in step (b), according to the amount of tension measured value of this membraneous material and the difference of this tension force setting value, to regulate and control the torque of these tension force swing wheels.

5. active tension force regulate and control method as claimed in claim 1; It is characterized in that; Wherein in step (c), order about these tension force swing wheels from this second site reversion to this primary importance, the primary importance of these tension force swing wheels is determined by the angular transposition of this drawing-inroller.

6. active tension force regulate and control method as claimed in claim 1 is characterized in that, wherein in step (c), drives this drawing-inroller and this tension force swing wheels.

7. active tension force regulate and control method as claimed in claim 1; It is characterized in that; Wherein in step (c), according to the linear velocity measuring value of this drawing-inroller, the difference that this tension force is swung the linear velocity measuring value of wheels, to regulate and control the rotating speed of these tension force swing wheels; And according to the amount of tension measured value of this membraneous material and the difference of this tension force setting value, to regulate and control the torque of these tension force swing wheels.

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