JPS6366072A - Wire coiling method - Google Patents

Abstract

PURPOSE:To enhance the rate of filling of a wound wire and facilitate drawing- out of the same by allowing the relative speed of feeding the wire with rotation of a turntable to take up wire, to vary with a certain cycle period continuously, and coiling up the wire into a specific shape. CONSTITUTION:At a constant speed, a wire 2 at a supply stand 1 is drawn out by pinch rollers 4 driven by a motor 3 and taken up on a turntable 6 rotated by another motor 5. Here the wire 2 is first wound spirally in one plane from the minimum to maximum bias. adjoiningly one after another to be followed by winding from the maximum to minimum dias. adjoiningly one after another, and this operation is repeated. The feeding speed of the pinchrollers 4 shall be set constant, and the revolving speed of the turntable 6 be increased and decreased at a certain cyclic period. That is, a command signal to the motor 5 is previously set in a controller 8, and the change timing of the revolving speed to give command to the motor 5 is controlled by a rotary encoder 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (8) Field of Industrial Application The present invention is directed to a method of winding a wire onto a winding frame of a turntable at a high filling rate.

(Prior Art) The following two methods are conventionally known as methods for winding wire around a turntable. In other words, the first method is to align each layer in the axial direction from the inner layer to the outer layer on the drum of the turntable and wind it sequentially.This winding method can increase the filling rate and is compact. It has the advantage of being able to produce coils with neat packaging.

On the other hand, since it is rolled from the inside, it will coil even slightly. The second method is to wind the wire in a pattern lay (flower wrap) in one plane from the inner diameter part to the outer diameter part.In this method, the wire is wound in regular layers, so the wire does not get entangled, and the drawing performance is improved. This is good, but it has the disadvantage that the porosity increases, making the package bulky, and the load tends to collapse.

Furthermore, Japanese Patent Publication No. 51-41858 proposes a method in which the wire rod is formed into a spiral shape using a forming roller before being wound onto a turntable. Because of the deformation, it cannot be applied to materials that require straightness during use, such as PC steel, for example.

(Objective of the Invention) This invention was made in order to eliminate these conventional drawbacks, and provides a wire rod that has a high filling rate and is wound in a layered manner, has good drawing performance, and can be used as a compact load. The present invention provides a method for winding a wire rod into a shape.

(Structure of the Invention) This invention provides a method for winding a wire onto a winding frame on a turntable, while feeding out the wire at a predetermined speed and adjusting the relative speed between the feeding speed and the rotational speed of the turntable at a constant rotation speed. 11-1 By continuously changing the wire rod, the wire is not formed into the winding diameter, but wound in a spiral shape in one plane from the smallest diameter to the largest diameter, and then from the largest diameter to the smallest diameter, and then successively adjacent to each other. This operation is then repeated.

In the above method, the wire rods are wound in a thinly wound manner and close to each other from the inner circumference to the outer circumference and from the outer circumference to the inner circumference without being subjected to plastic deformation. It can be wound up into a shape, and the drawer performance is also maintained well.

(Example) In FIGS. 1 and 2, the wire rod 2 of the supply stand 1 is pulled out at a constant speed by a binge [1-54] driven by the motor 3 of the feeding device, and is placed on a turntable 6 rotated by the motor 5. It is wound up. The motor 5 has a rotary encoder 7 that detects the rotational speed of the motor and generates a feedback signal, and a rotary encoder 7 that receives signals from the rotary encoder 7 to control the motor 5.
controller 8 is connected.

The turntable 6 has a core 61 and an outer frame 62, and an annular space is formed between them, and the wire 2 is housed in this space. The starting end of the wire 2 is fixed at the inner periphery of the bottom of this space, and from this fixed part it is wound in a spiral in one plane from the smallest diameter to the largest diameter, that is, in contact with the outer circumferential surface of the core 61. It is wound from the part to the part that touches the inner peripheral surface of the outer frame. Then, it moves to the upper side of the outer periphery and is successively wound adjacently from the largest diameter to the smallest diameter. Then, at the inner circumferential portion, the layer is further transferred to the upper layer, and is wound in a spiral shape in the same manner as described above. Thereafter, they are laminated in a spiral manner from the outer periphery to the inner periphery and from the inner periphery to the outer periphery within one plane, respectively.

In order to supply the wire rod 2 to the turntable 6 in such a spiral shape, the relative speed between the speed of the wire rod 2 sent by the pinch roller 4 and the rotational speed of the turntable 6 is continuously adjusted at a constant cycle. Adjust by changing the

As a method for this adjustment, for example, the feed speed of the pinch roller 4 is set constant, and the rotation speed of the turntable 6 is set as shown in FIG. As shown by 91, it is sufficient to increase or decrease the speed at a constant cycle from the maximum speed through the intermediate distance B to the minimum speed KO. This period is set so that when the wire 2 is wound to the minimum diameter, the speed is the highest, and when the wire 2 is wound to the maximum diameter, the speed is the lowest. To adjust this speed, the controller 8 sends a signal to the motor 5 of the turntable 6.
is set in advance, and the timing of the change in the rotation speed instructed to the motor 5 is set in advance by the rotary encoder 7.
I control.

The speed change may be set linearly as shown by line 91, but control becomes easier if it is set stepwise as shown by line 92.

FIG. 4 shows another example of the winding means, in which the turntable 6
A capstan 24 is disposed above the frame 65 to which rotational force is transmitted by a motor 21 mounted on the frame 65 via a reduction gear 22 and a rotation @ 23. After the wire rod 2 is wound around this main 11 pusher stamp 24 at a predetermined speed, it is sequentially removed from the bottom and dropped onto the turntable 6 to be wound up. Also in this example, the relative speed between the rotational speed of the capstan 24 and the rotational speed of the turntable 6 is changed periodically as described above. This change may be made by keeping the rotation of the turntable constant and periodically changing the feeding speed by the capstan, or by changing both speeds.

Practical example-1 P C1i with a diameter of 7mm on the Zaburai stand rod! it
2 is held, and the tip of the PC steel wire 2 is passed through the pinch roller 4 of the feeding device and fixed to the winding start portion of the turntable 6. The feeding speed was set to 401m/In1n, and the winding pitch (line center spacing) was 8II1ml:
Set the minimum winding diameter on the turntable 6 to 14.
The maximum winding diameter is set to 50 nm and the maximum winding diameter is set to 1850III, the corresponding rotation speed of the turntable 6 is calculated using the following formula, and the lower limit value and upper limit value are stored in the controller 8.

V=RXπD ■: Feeding speed (m/lin) R: Rotation speed of turntable (r/1ain) D:
Winding diameter (mm) The following settings are made to this controller 8 before startup.

(A) Set the rotation speed of the motor 5 to the upper limit value.

(B) Set so that the rotational speed changes continuously from the upper limit value to the lower limit value at a pitch of a predetermined time. For example, by applying the above system f1 to the above equation, this time can be calculated as 19
It will be 4 seconds.

(C) The low limit encoder 7 catches that the lower limit has been reached, feeds this back to the controller 8, and sets the controller 8 to convert from the lower limit to the upper limit.

(D) The mortar 7 catches the fact that the 1-limit value has been reached, and it is set so that it is fed back to the controller 8 to convert the upper limit value to the lower limit value.

After performing the above operations of the controller 8, the feeding device and the turntable 6 are activated, and the wire rod 2 is wound onto the turntable 6. Predetermined amount of wire rod 2
After winding, the turntable 6 is stopped.

The weight of the wound wire coil is 950k (], and the coil dimensions are: outer diameter 185Qmm, inner diameter 1450+1111
．． The height was 160mm.

From this result, it can be calculated that the filling factor of this coil is 73%.

In addition, when the wire rod was wound with the same wire coil diameter as described in F using a conventional method, the height was 280 mm and the filling rate was 42%.

The relationship between the winding pitch and the filling rate is as shown in FIG. 5 under the conditions of the above embodiment, and as the winding pitch becomes smaller, the filling rate increases as shown by the curve 93, and -
As shown by force curve 94, the coil height of the wound wire decreases as the winding bidge decreases. Therefore, the winding pitch is set to be as small as possible depending on the thickness, material, etc. of the wire.

In addition, since the wire rod 2 wound around the turntable 6 as described above is aligned in the turntable 6, the drawing performance is excellent, and since the wire rod 2 is not plastically deformed, it can be fed in a straight line. It has excellent Nomi properties and is suitable for materials that require 1aIl properties when used, such as PC steel materials.

(Effects of the Invention) As explained above, the present invention allows the relative speed between the feeding speed of the wire rod and the rotational speed of the turntable to be maintained at a constant circumference Il.
By continuously changing the diameter of 1, the wires are wound in a spiral shape in one plane from the smallest diameter to the largest diameter, and then sequentially from the largest diameter to the smallest diameter, and this operation is repeated. Since the straight wire rod is wound regularly, the filling rate is high and the wire rod is wound neatly, so there is no risk of the load collapsing, and the wire rod can be easily drawn out and has excellent straightness. It is something.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of an apparatus for implementing the present invention, Fig. 2 is a front view thereof, Fig. 3 is a control characteristic diagram of the rotation speed of the turntable, and Fig. 4 shows another embodiment of the turntable. Partial cross-sectional front view, FIG. 5 (This is a diagram of the relationship between the winding pitch and the filling rate. 1... Supply stand, 2... Wire rod, 4... Pinch roller, 5... Motor, 6 ...Turntable, 7...Rotary encoder, 8...Controller. Patent applicant: Shinko Wire Industry Co., Ltd. Representative: Patent attorney Etsu Kotani 11]
Patent Attorney Chief 1) Masayuki Patent Attorney Azumuki Itaya No. 3 Zukyokuma No. 4 Figure 5

Claims (1)

[Claims] 1. In a method of winding a wire onto a winding frame on a turntable, by feeding out the wire at a predetermined speed and continuously changing the relative speed between the feeding speed and the rotational speed of the turntable at a constant cycle. The method is characterized in that the wire is not formed into a winding diameter, but wound in a spiral shape in one plane from the smallest diameter to the largest diameter, and then wound successively adjacently from the largest diameter to the smallest diameter, and this operation is repeated. How to wind the wire rod.