CN103086180A - Unreeling machine and method for controlling unreeling of flexible materials - Google Patents

Abstract

The invention discloses an unreeling machine and a method for controlling unreeling of flexible materials, and belongs to the technical field of material processing. The unreeling machine comprises a material roller, a conveying roller, a motor, a controller, a first distance measuring unit and a second distance measuring unit. The material roller is driven by the motor, the first distance measuring unit is arranged below the position between the conveying roller and the material roller, the second distance measuring is arranged on the outer side of the material roller and aligned with the outer cylindrical surface of the material roller, and the controller is respectively connected with the first distance measuring unit and the second distance measuring unit and controls the rotation speed of the motor. According to the unreeling machine, the conveying roller is adopted to convey the flexible materials so that tension of the flexible materials is close to zero, the unreeling speed of the material roller is controlled through monitoring the radius of the material roller and position changes of a flexible material overhanging section, tension fluctuation hardly exists in the process of unreeling the flexible materials, and therefore the 'micro-tension' or 'zero-tension' unreeling of the flexible materials can be completed with high quality.

Description

A kind of method that unreeling machine and control flexible material unreel

Technical field

The present invention relates to the materials processing technology field, particularly a kind of unreeling machine and control the method that flexible material unreels.

Background technology

Unreeling machine is a kind of high efficiency equipment in the flexible material manufacture field, present existing unreeling machine mainly comprise tonometry roller, material roller and controller, the tonometry roller is the vitals of controlling flexible material tension force, Tensity size and variation that the tonometry roller is suffered according to it, send signal to controller, control motor speed by controller, unreel the speed of flexible material with the instrumentality material roller, when making flexible material unreel, tension force is definite value.

In actual conditions, when unreeling material, material roller friction force is much larger than flexible material tension force, and the tension force of required measurement is much smaller than the gravity of tonometry roller when requiring " Minimal Tension " or " zero tension force ", thereby tension pick-up type selecting difficulty, measuring has very large error.So with tonometry roller adjustment of tonicity size very inaccuracy, the flexible material tension fluctuation is large, existing unreeling machine can't be completed unreeling " Minimal Tension " of material or " zero tension force ".

Summary of the invention

The technical matters that (one) will solve

The technical problem to be solved in the present invention is: how to solve existing unreeling machine and control " Minimal Tension " or " zero tension force " tension force inaccuracy when unreeling, the problem that the flexible material tension fluctuation is large.

(2) technical scheme

In order to solve the problems of the technologies described above, the invention provides a kind of unreeling machine, described unreeling machine comprises: material roller, conveying roller, motor, controller, the first range cells and the second range cells, described material roller is by described motor-driven, described the first range cells above between described conveying roller and described material roller or below, described the second range cells is positioned at outside described material roller, and aim at the external cylindrical surface of described material roller, described controller respectively with described the first range cells be connected the second range cells and be connected, and control the rotating speed of described motor.

Wherein, described the first range cells below between described conveying roller and described material roller, described the second range cells be positioned at described material roller under.

Wherein, described controller is a kind of in micro controller system, programmable logic controller (PLC) and central process unit.

Wherein, described the first range cells is ultrasonic distance-measuring sensor or laser range sensor.

Wherein, described the second range cells is ultrasonic distance-measuring sensor or laser range sensor.

The invention also discloses a kind of method that flexible material unreels of controlling, described method comprises:

S1, material roller output flexible material are transferred out by conveying roller;

S2, the first range cells are obtained the first distance between itself and described flexible material, and are forwarded to controller, and the second range cells is obtained itself and the described material roller second distance between bottom, and is forwarded to described controller;

S3, described controller calculate the also setting rotating speed of regulating electric machine according to described the first distance that receives and described second distance, so that described flexible material forms the flexible material section of dangling between described conveying roller and described material roller, and make the described flexible material section of dangling and described the first range cells keep setpoint distance.

Wherein, in step S3, by regulating the setpoint distance of described the first range cells, make the unwinding tension of described flexible material reach required tension force.

Wherein, described controller adoption rate integral method is calculated the setting rotating speed of described motor.

Wherein, the computing formula of the setting rotating speed of the described motor of described proportional integral (PI) method calculating is:

n _Motor=n _set* j

Wherein, n _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 _x-H; n _MotorSetting rotating speed for described motor; n _setBe the setting rotating speed of described material roller, j is the revolution ratio of described motor and described material roller; Kp is rate mu-factor; Ti is the integration time constant; R is the radius of described material roller when being blank coil; L ₀Observed reading for described the second range cells when described material roller is blank coil; L _xBe current second distance; V ₀Speed for the described flexible material of described conveying roller transmission; H is the setpoint distance of described the first range cells and the described flexible material section of dangling; H _xBe the first current distance.

Wherein, after execution in step S3, directly return to step S2, unreel until described material roller is completed.

(3) beneficial effect

Unreeling machine in the present invention has been cancelled tonometry roller in prior art, adopt conveying roller to carry flexible material, flexible material tension force is close to zero, and change to control the material roller and unreel speed by monitoring material roller radius and the flexible material fragment position of dangling, making does not almost have tension fluctuation when unreeling flexible material, " Minimal Tension " or " zero tension force " that can complete in high quality flexible material unreels.

Description of drawings

Fig. 1 is the structural representation of the unreeling machine of an embodiment of the present invention.

Fig. 2 adopts the unreeling machine in Fig. 1 to control the method flow diagram that flexible material unreels.

Wherein: 1, conveying roller; 2, material roller; 3, motor; 4, controller; 5, the first range cells; 6, the second range cells; 7, the flexible material section of dangling; 8, flexible material.

The specific embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.

Fig. 1 is the structural representation of the unreeling machine of an embodiment of the present invention; With reference to Fig. 1, the unreeling machine of the present embodiment comprises: conveying roller 1, material roller 2, motor 3, controller 4, the first range cells 5 and the second range cells 6, the first range cells 5 is below between conveying roller 1 and material roller 2, and in the vertical direction the first range cells 5 can be 20 ~ 50cm with the distance of conveying roller 1 and material roller 2, the second range cells 6 be positioned at material roller 2 under, and the distance can be 20 ~ 50cm.Material roller 2 is driven by motor 3, controller 4 respectively with the first range cells 5 be connected range cells 6 and be connected, and the setting rotating speed of control motor 3.

Preferably, controller 4 has a kind of in the module of data processing function for micro controller system, programmable logic controller (PLC) and central process unit etc.

Preferably, the first range cells 5 and the second range cells 6 are the sensor that ultrasonic distance-measuring sensor or laser range sensor etc. can be used for finding range.

Fig. 2 adopts the unreeling machine in Fig. 1 to control the method flow diagram that flexible material unreels; With reference to Fig. 2, described method comprises:

Then S1, material roller 2 output flexible materials 8 are transferred out by conveying roller 1;

S2, the first range cells 5 are obtained the first distance between itself and flexible material 8, and are forwarded to controller 4, the second range cells 6 and obtain itself and material roller 2 second distance between bottom, and are forwarded to described controller 4;

S3, controller 4 calculate the also setting rotating speed of regulating electric machine 3 according to the first distance that receives and second distance, so that flexible material 8 forms the flexible material section of dangling 7 between conveying roller 1 and material roller 2, and making the flexible material section of dangling 7 and the first range cells 5 keep setpoint distance, this distance can be 20 ~ 50cm.The computing formula of the setting rotating speed of motor 3 is:

n _Motor=n _set* j

Wherein, n _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 _x-H; n _MotorSetting rotating speed for motor 3; n _setBe the setting rotating speed of material roller 2, j is the revolution ratio of motor 3 and material roller 2; Kp is rate mu-factor; Ti is the integration time constant; R is material roller 2 radiuses when being blank coil; L ₀Observed reading for the second range cells 6 when material roller 2 is blank coil; L _xBe current second distance; V ₀Speed for conveying roller 1 transmission flexible material 8; H is the setpoint distance of the first range cells 5 and the flexible material section of dangling 7; H _XBe the first current distance.

By this control method, the flexible material 8 that unreels when material roller 2 is more and more, and when radius diminished, the rotating speed of motor 3 can rise, with keep material roller 2 to unreel linear velocity constant.When the section of dangling 7 and the first range cells 5 distance H when becoming large, namely mean material roller 2 to unreel linear velocity excessively slow, controller 4 can accelerate by regulating electric machine 3 after receiving signal, otherwise, slow down, until distance H reverts to setting value

Preferably, in step S3, can be by regulating the setpoint distance H of the first range cells 5, make the unwinding tension of flexible material 8 reach required " Minimal Tension ", if want to increase unwinding tension, only need setpoint distance H is diminished, make the flexible material more than 8 of the section of dangling 7, the increase gravity flexible material 8 that stretches.Otherwise, can reduce unwinding tension.

Preferably, after execution in step S3, return to step S2, unreel until material roller 2 is completed.

Above embodiment only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (10)

1. unreeling machine, it is characterized in that, described unreeling machine comprises: material roller, conveying roller, motor, controller, the first range cells and the second range cells, described material roller is by described motor-driven, described the first range cells above between described conveying roller and described material roller or below, described the second range cells is positioned at outside described material roller, and aim at the external cylindrical surface of described material roller, described controller respectively with described the first range cells be connected the second range cells and be connected, and control the rotating speed of described motor.

2. unreeling machine as claimed in claim 1, is characterized in that, described the first range cells below between described conveying roller and described material roller, described the second range cells be positioned at described material roller under.

3. unreeling machine as claimed in claim 1 or 2, is characterized in that, described controller is a kind of in micro controller system, programmable logic controller (PLC) and central process unit.

4. unreeling machine as claimed in claim 1 or 2, is characterized in that, described the first range cells is ultrasonic distance-measuring sensor or laser range sensor.

5. unreeling machine as claimed in claim 1 or 2, is characterized in that, described the second range cells is ultrasonic distance-measuring sensor or laser range sensor.

6. an employing unreeling machine as described in any one in claim 2 ~ 5 is controlled the method that flexible material unreels, and it is characterized in that, described method comprises:

S1, material roller output flexible material are transferred out by conveying roller;

S2, the first range cells are obtained the first distance between itself and described flexible material, and are forwarded to controller, and the second range cells is obtained itself and the described material roller second distance between bottom, and is forwarded to described controller;

S3, described controller calculate the also setting rotating speed of regulating electric machine according to described the first distance that receives and described second distance, so that described flexible material forms the flexible material section of dangling between described conveying roller and described material roller, and make the described flexible material section of dangling and described the first range cells keep setpoint distance.

7. control as claimed in claim 6 the method that flexible material unreels, it is characterized in that, in step S3, by regulating the setpoint distance of described flexible material and described the first range cells, make described unwinding tension reach required tension force.

8. control as claimed in claim 6 the method that flexible material unreels, it is characterized in that, described controller adoption rate integral method is calculated the setting rotating speed of described motor.

9. control as claimed in claim 8 the method that flexible material unreels, it is characterized in that, the computing formula that described proportional integral (PI) method is calculated the setting rotating speed of described motor is:

n _Motor=n _set* j

Wherein, n _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 _x-H; n _MotorSetting rotating speed for described motor; n _setBe the setting rotating speed of described material roller, j is the revolution ratio of described motor and described material roller; Kp is rate mu-factor; Ti is the integration time constant; R is the radius of described material roller when being blank coil; L ₀Observed reading for described the second range cells when described material roller is blank coil; L _xBe current second distance; V ₀Speed for the described flexible material of described conveying roller transmission; H is the setpoint distance of described the first range cells and the described flexible material section of dangling; H _xBe the first current distance.

10. the method that unreels as control flexible material as described in any one in claim 6 ~ 9 is characterized in that, after execution in step S3, directly returns to step S2, unreels until described material roller is completed.

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