JPH04140276A - Method of winding superconductive wire material and device therefor - Google Patents

Abstract

PURPOSE:To wind up a superconductive wire material while the tension of the wire material is precisely made to be coincident with a set value, by comparing a measured tension of the superconductive wire material with a previously set value, and by moving a movable pulley in a direction in which the tension is increased, if the measured value is larger (smaller) than the previously set value. CONSTITUTION:A tension of a superconductive wire material 3 is measured by a load cell 11 and is compared with set value. Then, a movable pulley 5 which arranged between a supply drum 1 and a wind-up drum 2 is moved. Accordingly, the tension of the wire material 3 can be appropriately held always.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a superconducting wire winding method and apparatus for manufacturing a superconducting magnet coil.

[Prior Art] In the coil winding process when manufacturing a superconducting magnet coil, it is necessary to wind the wire while applying tension to the wire. Conventionally, as shown in FIG. 2, fixed pulleys 4a and 4b and a movable pulley 5 are used to apply tension to the wire 3 with a weight 6, or as shown in FIG.
There is a method of applying tension to the wire rod 3 by applying a static torque with a brake 8 or the like and winding the wire rod 3 with a rotational torque exceeding that torque with the winding drum 2. In addition, in FIGS. 2 and 3, 7 is a brake mechanism, 9 is a current control electric circuit, and 10 is a control line.

[Problem to be solved by the invention]

In the case of the weight-type tension generator shown in FIG. 2, as long as the weight 6 has a constant load, only a constant tension can be obtained. If the wire rod 3 wound around the superconducting magnet coil can have a constant tension, the above device can be said to be the simplest and cheapest device. However, in the case of layered winding (pancake winding), it is necessary to reduce the tension each time the number of winding stages increases. It is necessary to adjust the brake mechanism 7 each time.

Further, in the method of applying a static torque to the supply drum 1 using the electromagnetic brake 8 as shown in FIG. 3, the tension can be adjusted relatively easily, but there is a problem that "torque-tension" is not achieved. In other words, with this method, truly accurate tension can be obtained by (1) changes in braking force due to wear of the electromagnetic brake, etc., and (2) changes in wire tension due to changes in the diameter of the wire wound around the supply tram. This is difficult and can only be used as an empirical guideline.

[Means to solve the problem]

In order to solve the above-mentioned conventional problems, the present invention winds the superconducting wire wound around the supply drum onto a winding drum through sequentially a first fixed pulley, a moving pulley and a second fixed pulley. In the superconducting wire winding method, the tension of the superconducting wire is measured, and the measured value is compared with a preset value, and if the measured value is larger (smaller), the tension is decreased (increased). A method for winding a superconducting wire characterized by moving the movable pulley in the following directions; In a method for winding a superconducting wire onto a winding drum, the tension of the superconducting wire is measured, and the measured value is compared with a preset value, and if the measured value is larger (smaller), A method for winding a superconducting wire characterized by reducing (increasing) the rotational braking force of the supply drum; the supply drum around which the superconducting wire is wound, the first fixed pulley, the movable pulley and the second fixed pulley are sequentially moved. A winding drum for winding the superconducting wire through the superconducting wire, a load cell for measuring the tension of the superconducting wire, and means for moving the movable pulley via a spring in accordance with the output of the load cell. a superconducting wire winding device; a supply drum around which the superconducting wire is wound; a winding drum that winds the superconducting wire through a first fixed pulley, a movable pulley, and a second fixed pulley in sequence; and the superconducting wire. A method for winding a superconducting wire comprising: a load cell for measuring the tension of the supply drum; an electromagnetic brake provided on the supply drum; and means for controlling the current of the electromagnetic brake in accordance with the output of the coat cell. This paper proposes a device.

3. In the present invention, the tension of the superconducting wire is measured with a load cell or the like and compared with a set value, and a movable pulley provided between the supply drum and the winding drum is moved, or a rotation brake of the supply drum is used. The tension is always maintained at an appropriate level by changing the force.

[Example] FIG. 1 is a schematic diagram showing an embodiment of the present invention.

The wire rod 3 wound around the supply drum I is wound around a movable pulley 5 via a fixed pulley 4a, and then wound onto a winding drum 2 via another fixed pulley 4b. In this case, the tension coil spring 12 attached below the moving pulley 5 causes the wire 3 to
tension is applied to. A static torque is applied to the supply drum 1 by an electromagnetic brake 8 controlled by a current control electric circuit 9 so that the tension reaches a set value.

Load converter (load cell) connected to the lower end of the movable pulley 5
ll accurately reads the spring force of the tension coil spring 12 (ie, twice the tension of the wire) and feeds it back to the controller 19. In this case, the deflection of the spring and the load are in a proportional relationship. The read tension is compared in the controller 19 to see if it is equal to a set value. If the read value of the load converter 11 becomes smaller than the set value due to some factor (brake wear, etc.), the motor 15 of the slide machine tli14 is activated by a command from the controller 19, and the sliding Move child 13 downward. A decrease in tension means that the amount of deflection of the tension coil spring 12 is decreased.
By moving 3 downward, the tension coil spring 12
Pull again to increase the tension until it matches the set point.

If the braking force of the electromagnetic brake 8 that applies static torque to the supply drum 1 is too weak, the read value and the set value will not match even if the slider 13 is moved downward, and the slider 1
3 moves to the lower end of the slide and hits the switch 16b. Then, the controller 19 detecting the operation of the switch 16b issues an operation command to the current control electric circuit 9 connected to the control line 1O to increase the braking force of the electromagnetic brake 8, and the switch 16b Continue until released. In this way, the necessary electromagnetic force or current is applied to the electromagnetic brake 8.

If the braking force of the 11m brake 8 is too strong for some reason, the operation is completely opposite to that described above.

Such a situation may occur when the amount of wire rod 3 wound around the supply drum 1 is running low and the static torque becomes large.

In addition, the dock 17 attached to the winding drum 2 is connected to the sensor 1.
8, the tension can be set for the rotational speed in the controller 19, and the function as an automatic winding device can be increased. Furthermore, although not shown in the figure, a fixed pulley 4a.

An encoder is provided on either of the wires 4b to measure the length of the wire.

``Effects of the Invention'' In the present invention, the tension of the wire to be wound can be directly detected and the tension can be accurately matched to the set tension value as the wire is wound. The process of coil winding (pancake winding) has two effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are both schematic diagrams illustrating a conventional wire winding device. 1... Supply drum, 2... Winding drum. 3... Wire rod, 4a, 4b... Fixed pulley 5... Moving pulley, 6... Weight 7... Brake mechanism, 8... Electromagnetic brake. 9... Current control electric circuit 10... Control line 11... Load converter (load cell). 12...Tension coil spring, 13...Slider. 14...Slide mechanism, 15...Motor 6a 16b...Switch 17...Dock 18...Sensor 19...Controller. agent

Claims (1)

[Claims] 1) A superconducting wire winding method in which a superconducting wire wound around a supply drum is wound around a winding drum through a first fixed pulley, a movable pulley, and a second fixed pulley in sequence. , measure the tension of the superconducting wire, compare the measured value with a preset value, and if the measured value is larger (smaller), move the movable pulley in the direction where the tension decreases (increases). A method for winding a superconducting wire characterized by moving it. 2) In a superconducting wire winding method in which a superconducting wire wound around a supply drum is wound onto a winding drum through a first constant pulley, a movable pulley, and a second constant pulley in sequence, the tension of the superconducting wire is and compares the measured value with a preset value, and when the measured value is larger (smaller), the rotational braking force of the supply drum is reduced (increased). Winding method. 3) A supply drum around which a superconducting wire is wound, a winding drum that winds the superconducting wire sequentially through a first constant pulley, a movable pulley, and a second constant pulley, and a load cell that measures the tension of the superconducting wire. A superconducting wire winding device comprising: means for moving the movable pulley via a spring in accordance with the output of the load cell. 4) A supply drum around which the superconducting wire is wound, a winding drum that winds the superconducting wire sequentially through a first constant pulley, a movable pulley, and a second constant pulley, and a load cell that measures the tension of the superconducting wire. A superconducting wire winding device comprising: an electromagnetic brake provided on the supply drum; and means for controlling the current of the electromagnetic brake according to the output of the load cell.