JPH0725449B2 - Drive control method for multi-axis winder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drive control method for a multi-axis winder that continuously winds a sheet material such as a plastic film, a cloth, and a metal foil.

(Prior Art) Generally, in the case of continuously winding a continuously produced sheet material such as a plastic film, a cloth, and a metal foil, a multi-axis winding machine as shown in FIG. 2 is used. There is.

The winding machine includes an arm 1 that is rotatably mounted on a machine base and that rotates intermittently, a winding shaft 2 and 3 that is rotatably mounted on the arm 1, an inverter, an electric motor, a speed reducer, and the like. Drive devices 4 and 5 configured to rotate the winding shafts 2 and 3, respectively,
A cutting device 6 that moves and cuts the cutter in a direction orthogonal to the longitudinal direction of the sheet material, a tension detector 7 that detects the tension of the sheet material, and a drive device 4 based on the winding tension of the sheet material. 5, a tension control unit 16 that controls the rotation, a cutter control unit 17 that controls the moving speed of the cutter, and a control unit 15 that includes a calculation unit 18 and the like, so that the winding tension is set in advance. It controls the rotation speed of the winding shaft.

When a preset amount of sheet material is wound, the arm 1 is rotated to wind the winding shaft 2 in the winding position to the standby position and the winding shaft 3 in the standby position. Move to the picking position.

Then, the cutter of the cutting device 6 is moved in the direction orthogonal to the longitudinal direction of the sheet-like material to cut it. At this time, when the cutter moves, its position is sent from the cutter control unit 17 to the tension control unit 16 to change the winding tension to the optimum tension value for the sheet width at that time, and the abnormal tension causes the sheet-like object to pull. I try not to break it.

(Problem) In the method of cutting by moving the cutter in the direction orthogonal to the longitudinal direction of the sheet-like material as described above, it is not possible to cut in a state perpendicular to the longitudinal direction, and the cutting portion has a longitudinal direction. It becomes a tilted state and the part cannot be used as a product.

Therefore, in order to reduce this inclined portion as much as possible, the moving speed of the cutter is made high. However, when the take-up speed of the sheet material and the moving speed of the cutter become high, even if the tension is corrected based on the moving position of the cutter, it takes time to calculate the corresponding tension value from the cutter position. At the same time, since the inertial force of the winding shaft that winds up the sheet is large, the winding shaft cannot be immediately rotated with the corrected tension, and it takes time to reach the tension corresponding to the cutter position. Cause a delay.

Therefore, there is a problem that the tension per unit cross-sectional area in the uncut portion becomes excessive and the sheet-shaped material is torn before the sheet-shaped material is cut by the cutter.

(Object) An object of the present invention is to drive a multi-spindle winder capable of surely cutting with a cutter without breaking a traveling sheet-like object when switching from a full winding shaft to an empty winding shaft. It is to provide a control method.

(Means for Solving Problems) In order to solve the above problems, a drive control method for a multi-spindle winder according to the present invention has a plurality of arms mounted on a machine base so as to intermittently rotate. So that each of the winding shafts can be independently rotated by a driving device, and the driving device can be driven and controlled by a control device having a tension controller and a speed controller. When continuously winding a sheet-like material by the multi-axis type winding machine described above, at the time of winding the sheet-like material, the winding shaft is drive-controlled based on a signal from the tension control unit, and the sheet-like material is When switching from the full take-up shaft to the empty take-up shaft by switching the tension control unit to the speed control unit, the full take-up shaft is driven and controlled based on a signal from the speed control unit. Drive control of idle take-up shaft based on signal from speed controller When the cut sheet-like material is wound around the idle winding shaft, the speed control unit is switched to the tension control unit, and the idle winding shaft is drive-controlled based on a signal from the tension control unit. Is done.

(Example) The structure of one example of the multi-axis winding machine of the present invention will be described with reference to the drawings.

An arm 1, a winding shaft 2, 3, which constitutes the winder, drive devices 4, 5 for rotating the winding shaft 2, 3, a cutting device 6, a tension detector 7, and a cutter for controlling the moving speed of the cutter. Since the control unit 17 and the like are exactly the same as those of the winder shown in FIG. 2, detailed description thereof will be omitted and the control device 8
Will be described.

In the figure, 9 is a tension control unit that controls the driving devices 4 and 5 based on the tension of the sheet material, and 10 is a control of the driving devices 4 and 5 based on the speed of the winding shaft at the start of sheet cutting. It is a speed control unit. Reference numeral 11 denotes a switching unit for switching from tension control to speed control, which is activated by a start signal for starting the cutter of the cutting device 6. Reference numeral 12 denotes a speed detector, which detects the rotation speed of the winding shaft at the start of cutting and inputs it to the speed control unit 10.

In the above-described winding machine, the winding shaft 2 in the winding position is controlled based on a signal from the tension control unit 9 which operates according to the tension signal detected by the tension detector 7, and the driving device 4
Is rotated so that the tension value is preset.

When a preset amount of the sheet-like material is wound on the winding shaft 2, the arm 1 is rotated so that the winding shaft 2 is in the standby position and the winding shaft 3 in the standby position is wound. Moved to a position.

Then, an operation start signal is sent from the control device 8 to the cutting device 6, and at the same time, an operation signal is sent to the switching unit 11, and the control circuit is switched from the tension control unit 9 to the speed control unit 10.
At this time, the rotation speed of the winding shaft 2 is detected by the speed detector 12 and input to the speed control unit, and is controlled by the drive unit 4 which is controlled based on the signal from the speed control unit 10 so as to maintain the speed. The rotation speed of the winding shaft 2 is controlled.

Then, when the cutting of the sheet-like material is completed and the end of the sheet-like material is wound around the winding shaft 3, an operation signal is sent to the switching unit 11 and the control circuit is transferred from the speed control unit 10 to the tension control unit 9. The sheet-shaped material is wound by switching and controlling the rotation of the winding shaft 3 by the drive device 5 which is controlled based on the signal from the tension controller 9 so that the tension value becomes a preset tension value.

On the other hand, the control of the drive device 4 is stopped and the rotation of the winding shaft 2 is stopped.

It has been found that the drive control in the above-described multi-axis winder can be performed by repeatedly controlling various driving and cutting tests to control the drive device based on the strain amount. If it is based on the control, the force applied to the sheet-like object will always be automatically controlled to an appropriate value according to the theory of [strain amount x cross-sectional area] even during the cutting operation of the sheet-like object. .

A method of adding a certain amount of strain to such a sheet-like object is to adjust the speed of the sheet-like object wound on the winding shaft with respect to the sheet conveying speed of the sheet conveying mechanism on the upstream side of the winding shaft. This is performed by increasing the amount by a certain amount, and the control method is the speed control itself without any correction.

In the above-mentioned speed control, the winding diameter of the sheet-shaped material wound around the winding shaft changes every moment, and the rotation speed of the winding shaft is changed in consideration of the amount of change to control the peripheral speed of the sheet-shaped material. Since it is a very difficult technique, it is not generally implemented as a method for controlling the winding of a sheet-like material.

That is, the change in the winding diameter changes not only due to the difference in the physical properties of the surface of the sheet material, but also due to the tensile force of the sheet material given by the speed control, and the cause and the result are entangled and controlled based on what. Because it has the essential problem of whether it should be done.

After understanding the above matters, the time for cutting the sheet in the direction orthogonal to the longitudinal direction is a very short time, and the winding diameter at that time is generally large.
It has been found that it is not necessary to consider the change in the winding diameter during the cutting of the sheet-shaped material, and the speed control can be performed in the winding control method of the sheet-shaped material.

(Effects of the Invention) In the drive control method for a multi-axis winder of the present invention, a plurality of wind-up shafts are rotatably attached to an arm attached to a machine base so as to rotate intermittently, Each winding shaft is independently rotated by a driving device, and a sheet-like material is formed by a multi-axis winding machine in which the driving device is driven and controlled by a control device having a tension control unit and a speed control unit. During continuous winding, when winding a sheet-shaped object, the winding shaft is drive-controlled based on a signal from the tension control unit, the sheet-shaped object is cut, and the empty winding is performed from the full winding shaft. When switching to the shaft, the tension control unit is switched to the speed control unit, the full take-up shaft is driven and controlled based on the signal from the speed control unit, and the idle winding shaft is changed to the signal from the speed control unit. The cut sheet-like material is driven and controlled based on When it is wound around the sheet, the speed control unit is switched to the tension control unit so that the idle winding shaft is drive-controlled based on the signal from the tension control unit. When the sheet-shaped article is cut by traveling in a direction perpendicular to the sheet-shaped article, the sheet-like article is not broken without causing excessive tension per unit cross-sectional area in the uncut portion of the sheet-like article. Objects can be reliably cut with a cutter.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of the multi-spindle winder of the present invention. FIG. 2 is a schematic view showing one embodiment of a conventional multi-spindle winder. 1: Arm, 2, 3: Winding shaft, 4,5: Drive device, 6: Cutting device, 7:
Tension detector, 8 and 15: control device, 9 and 16: tension control unit, 10: speed control unit, 11: switching unit, 12: speed detector, 13 and 17: cutter control unit, 18: computing unit

Continuation of the front page (56) References JP-A-50-74071 (JP, A) JP-A-60-157445 (JP, A) JP-A-62-72425 (JP, A) Actual development 57-560 (JP , U) Japanese Patent Publication No. 47-43714 (JP, B1)

Claims (1)

[Claims] 1. A plurality of winding shafts are rotatably mounted on an arm mounted on a machine base so as to rotate intermittently, and each of the winding shafts is independently rotated by a drive device. At the same time, when the sheet-shaped material is continuously wound by a multi-axis type winding machine in which the driving device is drive-controlled by a controller having a tension controller and a speed controller, The take-up shaft is driven and controlled based on a signal from the tension control unit, and when the sheet-shaped material is cut and the full take-up shaft is switched to the empty take-up shaft, the tension control unit changes to the speed control unit. The full take-up shaft is driven and controlled based on a signal from the speed control unit, and the empty take-up shaft is driven and controlled based on a signal from the speed control unit. When wound around the winding shaft, tension control is applied from the speed control unit. Drive control method for a multiaxial winder, characterized in that as the air take-up shaft is switched to part is driven and controlled based on a signal from the tension control unit.