JPS623071B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for controlling the rotational speed of a rotating machine for winding and twisting, such as a tape winding machine, a wire twisting machine, and a twisting machine. The maximum rotational speed of this type of rotating machine is determined by the centrifugal force of the rotating body on which the tape pad or wire bobbin is mounted, the rotation radius of the rotating body, and the weight thereof. In the conventional technology, the rotation speed set in this way is kept constant even if there is room to increase the rotation speed due to the weight of the rotating body being reduced by feeding the tape or wire, resulting in low productivity. There were flaws. An object of the present invention is to provide a method for controlling the rotational speed of a rotating machine for winding and twisting tapes, wires, etc., which can increase the rotational speed in accordance with the reduction in the weight of the rotating body and improve productivity. It is in. Embodiments of the present invention will be described with reference to the drawings. FIG. 1 systematically shows an apparatus for carrying out the method of the present invention, and shows a plurality of rotating bodies 10A, 10B, 10 of a rotating machine.
C and 10D are rotationally driven by a motor 12. In the illustrated embodiment, the rotating bodies 10A to 10D
As shown in FIG. 2, these are a plurality of cages of a wire twisting machine, and each cage is made up of several units each including three bobbins 14A, 14B, and 14C as one unit, as shown in FIG. . The rotating body 10A, which is the first cage, has two units, and the rotating body 1, which is the second cage, has two units.
0B is 4 units, third cage is rotating body 10C
is 6 units, and the rotating body 10D, which is the fourth cage, is 8 units.
Each has a unit. A center line 16 such as a steel core is fed out from a bobbin 18, passes through the first to fourth cages, and as these cages rotate, strands 20A, 20B, 20C, and 20D are sequentially twisted thereon. The stranded wire 22 is then taken up by a take-up machine 24 and wound up by a take-up machine 26. Rotating body 10
A to 10D are initially rotated at a rotational speed N allowed by their maximum weight. The centrifugal force F generated on the rotating bodies 10A to 10D (hereinafter referred to as 10) has a radius of rotation r,
Weight of the rotating body M + m (M is the weight of the rotating body only, m
is the remaining weight of the wire in the bobbin), and is expressed as F=2πrN ² (M+m) (1). The bobbin remaining weight m is the remaining winding diameter Ra, the bobbin body diameter
From Rb, the width L in the bobbin, and the specific gravity of the strand e, it is expressed as m=π(Ra ² −Rb ² )L·e (2). The remaining winding diameter Ra of the wire in the bobbin is determined by supplying pulse signals to the digital controller 30 from the pulse signal devices 28A to 28D, which generate one pulse for each rotation of one bobbin in the rotating body, as shown in FIG. This controller 30 determines this remaining winding diameter.
Find the maximum rotation speed N allowed according to Ra. The remaining winding diameter Ra is calculated from the pulse integrated value P (within unit time) and the take-up speed v of the stranded wire 22 as Ra=v/2πP (3), and as shown in Figure 4, as P increases, It gradually decreases towards Rb. Note that v changes as v ₁ , v ₂ , v ₃ , . . . as the rotational speed N changes as N ₁ , N ₂ , N _{3 , . .} . . On the other hand, the rotation speed N is obtained from equation (1) as N ² =F/2πr(M+m)...(4), and by substituting equation (2) into equation (4), N ² =F/2πr{M+π (Ra ² −Rb ² ) L・e
}…(4)′, so becomes. However, K ₁ = 2πr, and K ₂ = 2π ² rL・e
It is. From equation (5), when Ra > Rb, N gradually increases as Ra decreases, and when Ra = Rb, that is, the remaining winding diameter
When Ra is gone, N is the maximum

[Formula] becomes. Therefore, the controller 30 controls this rotation speed N
By adding the correction signal S ₁ to the reference signal S ₀ determined by the rotation speed setting device 32 and supplying it to the motor control circuit 34, the rotation speed of the motor 12 is gradually increased as the remaining winding diameter Ra decreases. can do. FIG. 5 shows a state in which the rotational speed N of the rotating body 10 increases from Nmin to Nmax as the remaining winding diameter Ra gradually decreases. Nmin is the number of rotations allowed by the maximum weight of each rotating body 10, and Nmax is Ra=
Rotation speed when Rb

[Formula]. In addition, considering the safety of machine operation, it may be increased stepwise from Nmin to Nmax. As the rotational speed of the rotating body 10 increases, the take-up machine 24
and the rotational speed of the winder 26 is also increased, by supplying a correction signal S ₁ to the control circuit of the winder and the winder. Since each rotary body actually has a different residual winding diameter, it is necessary to determine the number of rotations according to the rotary body having the maximum residual winding diameter. As can be seen from FIG. 2, the rotation speed of the motor 12 is determined by the rotation speed detector 3.
6, and this detection signal _S2 is fed back to correct the motor 12 to a predetermined rotation speed. In the above embodiment, the remaining winding amount was calculated from the remaining winding diameter, but it may also be calculated from the unreeled length of the wire. Also,
In the above embodiment, the present invention is applied to a wire twisting machine, but the present invention can be similarly applied to a tape winding machine. According to the present invention, as described above, the rotational speed of the rotating body is increased in accordance with the reduction in the amount of remaining winding on the rotating body, so winding and twisting operations can be made more efficient, and productivity is significantly improved. do.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram of an apparatus for carrying out the method of the present invention, FIGS. 2 and 3 are a schematic diagram of an example of a wire twisting machine to which the present invention is applied, and a schematic front view of one rotating body. FIG. 4 is a diagram showing the relationship between the cumulative rotational speed of the rotating body and the winding diameter, and FIG. 5 is a diagram showing the rotational speed control characteristics according to the method of the present invention. 10A to 10D...Rotating body, 12...Motor, 20A to 20D...Element wire, 22...Twisted wire,
28A to 28D... Pulse transmitter, 30... Digital controller, 32... Rotation speed setting device, 3
4...Motor control circuit.

Claims (1)

[Claims] 1. A tape characterized by detecting the remaining winding amount of a rotating body of a rotating machine for winding and twisting tapes, wire rods, etc., and increasing the rotational speed of the rotating body in accordance with a decrease in the detected value of the remaining winding amount. , a method of controlling the rotation speed of a rotating machine for winding and twisting wire rods, etc.