JPS58123610A - Method and apparatus for producing constant pitch twisted wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for producing a constant pitch twisted wire.

When manufacturing a stranded wire by twisting strands together, it is preferable in terms of quality that the twist pitch of the product strands be uniform. Although Fig. 1 shows a basic form of a wire twisting machine, the wire t sent out from the wire delivery bobbin 1 is twisted together by the rotation of the flyer 2, and then twisted downstream of the twisting die 3. The line becomes S,
It is wound up by the winding device 5. In this case, the pitch p of the stranded wire S
is expressed by p=□, where the number of rotations of the flyer 2 is n11 per unit time, and V is the traveling length of the stranded wire S in the same unit time.

In fact, both the rotational speed 01 and the traveling speed V of the stranded wire S are constantly changing, and it is not so easy to obtain a stranded wire with a constant twisting pitch. For example, in a double-twisting wire twisting machine, when setting the twisting pitch itself, the capstan take-up speed is determined by exchanging gears, and the twisting pitch - (capstan take-up speed txt) / 2 It is also generally difficult to maintain

The present invention has been made to eliminate the disadvantages of the prior art, and provides a method and apparatus for producing stranded wire with a desired constant pitch regardless of the type of stranding machine. This provides a new device that eliminates the need for a capstan for pitch setting.

An embodiment of this emission will be explained with reference to the figure. As already mentioned, FIG. 1 shows the most basic configuration of a wire twisting machine, and the basic configuration is the same for more advanced models such as the double twist type. Now, in Figure 1, flyer 2
is provided with a first pulse generator PG. This is flyer 2
For example, one or more magnets or photoelectric elements are attached near the outer circumference of the rotating portion of the fryer 2, and one or more pulses are generated per rotation of the fryer 2.

Next, a measuring wheel 4 with a known circumference t is provided while the product stranded wire S is being wound by the winding device 5 and traveling, and a second pulse 5 similar to that described above is generated on this measuring wheel 4. will be established.

FIG. 2 shows a block diagram of the control system used in the present invention, first of which is the first pulse generator PG.

A first counting circuit C2 counts the number of pulses generated by the second pulse generator PG2, and a second counting circuit C1 counts the number of pulses generated by the second pulse generator PG2. If one pulse is emitted for each rotation of the flyer 2 and the measuring wheel 4, n pulses are counted in the first counting circuit CI for every n1 revolutions of the flyer 2 and the measuring wheel 4 within a certain period of time. , and n! for every n1 revolutions of the measuring wheel 4 within the same period of time. 5- pulses will be counted in the second counting circuit C2. Therefore, in this case, the number of rotations of fryer 2 is "1".
, the running speed of the product stranded wire S is n, z, and the twist pitch is p=nt7! /rIx will be calculated. However, the circuit that actually performs this calculation is the arithmetic circuit A.
It is. Further, a comparison circuit CP is provided, and this comparison circuit C
A pitch value p is inputted to P from the arithmetic circuit A, and a desired fixed pitch p to be compared with this. is input from a separately provided reference signal generation circuit. However, in this comparator circuit CP, the pitch p of the twisted wire S which is currently being twisted is
A comparison is made with the desired fixed pitch po. I) =
l) When o, of course, the current operating state is sufficient, so there is no output from the comparator circuit. I)
>1) (When positive, a negative pulse is output from this comparison circuit CP and enters the motor control circuit, which decelerates the motor M that drives the winding device 5.

When p < p o, a positive pulse is output from the comparator circuit CP and enters the motor control circuit, causing the motor M to speed up. In this way, tS - twist pitch p in the currently ongoing twisting process is always set to the desired twist pitch p. While comparing this p. The winding speed of the stranded wire is adjusted so that the number is equal.

This real thing! In example i, the number of revolutions of the fryer is counted as a digital needle by a first pulse generator, and the traveling speed of the stranded wire is also counted by a second pulse generator as a number of revolutions per unit time of a digital needle of a measuring wheel, These digital acids are controlled by calculation and ratio axis. However, it is also possible to adopt a modified embodiment in which the number of revolutions of the fryer is detected by an analog value such as a cone pressure, for example by using a takoze filter, and the winding speed is controlled by a comparison using an analog value and a control circuit.

This invention utilizes a control circuit that includes simple counting, arithmetic, and comparison circuits, as described in detail above, to continuously measure the twist pitch of ongoing stranded wire production and to obtain a desired constant pitch value. Since the measured pitch is controlled to match the fixed pitch value by comparison, it is possible to always accurately manufacture stranded wires with a constant pitch. In addition, there is no need for a gear-changing capstan in a double-twisting machine.
There is an advantage that the rotation speed of the flyer and the wire take-up speed can be set and controlled so that the desired twist pitch is obtained at any time.

[Brief explanation of drawings]

FIG. M1 is a simplified side view showing one embodiment of the present invention, and FIG. 2 is a block diagram used in the present invention. 2... Flyer, 4 Measuring wheel, PG,... 1st
Pulse generator, POl/second pulse generator, C1r C
2. Counting circuit, A. Arithmetic circuit, CP... Comparison circuit, Agent: Patent attorney Takeo Masuda 1:1

Claims (1)

[Scope of Claims] (a) A step of detecting the number of rotations (nl) of the stranding machine flyer (1) within a certain period of time; (b) A length of the product stranded wire traveling within the certain period of time; Saku n2
(1) calculating the current pitch (p=1) from the running length (ntt) of the stranded wire and the rotational speed (n, ); and n. ) The above calculated pitch (p) and the desired fixed pitch (
(e) As a result of the above comparison process, the number of revolutions of the winding device of the stranding machine is increased when p>po, and the number of revolutions is decreased when p<po. A constant pitch stranded wire manufacturing method comprising the step of increasing and decelerating a drive motor of a winding device. 2. (a) A first pulse generator (PGs) that is installed in the flyer (2) of the wire twisting machine and generates a fixed number of pulses for each rotation of the flyer; A measuring wheel (4
) and a second pulse generator (P Gz ) that generates a constant number of pulses per revolution of the measuring wheel; The first counting circuit (C1) counts the number of pulses n1 and n, respectively. (e) a reference signal generation circuit that generates a reference signal corresponding to the desired pitch Po; and (f) the arithmetic circuit. (g) a comparison circuit that compares a signal corresponding to the calculated pitch value p inputted from the reference signal corresponding to the constant pitch value po; A fixed-pitch stranded wire manufacturing device comprising a motor control circuit that is controlled by an input signal from a comparison circuit.