JPS5928929B2 - Constant pitch stranded wire manufacturing equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a constant pitch stranded wire manufacturing device.

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.

Figure 1 shows a basic form of a wire twisting machine, and shows the strand w being fed out from the strand feeding bobbin 1.
are twisted together by the rotation of the flyer 2, become a stranded wire S downstream of the twisting die 3, and are wound up by the winding device 5. In this case, the pitch p of the twisted wire s is the flyer 2
nl per unit time, stranded wire S in the same unit time
If the running length of the wire is , then p = 6.However, the number of rotations of the flyer nl and the running speed of the stranded wire S are actually constantly changing, so that a stranded wire with a constant twist pitch can be obtained. It's not that easy. For example, in a double-twisting wire twisting machine, when setting the twisting pitch itself, the capstan take-up speed is determined by replacing the gears, and this determines the twist pitch (capstan take-up speed)/ 2× (flyer rotational speed), and setting the desired pitch in this way is not only complicated, but also the pitch once set must be kept constant during operation of the stranding machine. is also generally difficult. The present invention has been made in order to eliminate the disadvantages of the prior art, and provides an apparatus that generally produces stranded wire with a desired constant pitch regardless of the type of stranding machine. The present invention provides a new device that does not require a capstan for pitch setting. An embodiment of the invention will be described with reference to the drawings.

As already mentioned, FIG. 1 shows the 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,
The flyer 2 receives a first pulse generator PGl. This is near the outer periphery of the rotating part of the fryer 2, for example, one or more magnets or photoelectric elements are attached equally around the circumference, and one or more electrons are generated per rotation of the fryer 2. It is. Next, a measuring wheel 4 with a known circumference t is provided in the middle of the product stranded wire S being wound by the winding device 5 and traveling, and this measuring wheel 4 is provided with a second pulse generator PG2 similar to that described above. .

FIG. 2 shows a block diagram of the control system used in this invention. First, there is a first counting circuit C1 that counts the number of pulses generated by the first pulse generator PG1, and a pulse generated by the second pulse generator PG2. Second counting circuit C2 that counts the number
will be established.

If one pulse is emitted for each revolution of the flyer 2 and the measuring wheel 4, then n1 pulses are counted in the first counting circuit C1 for every n1 revolutions of the flyer 2 within a certain period of time; For every N2 revolutions of the measuring wheel 4 within the same time period, N2 pulses will be counted in the second counting circuit C2. Therefore, in this case, the rotational speed n1 of the flyer 2, the traveling speed of the product stranded wire S is N2t, and the twisting pitch p is P=N2b.
jl will be calculated. However, the circuit that actually performs this calculation is the arithmetic circuit A. Further, a comparison circuit CP is provided, to which a pitch value p is inputted 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. In this comparator circuit CP, the pitch p of the twisted wire S currently being twisted and the desired constant pitch P. A comparison is made with Of course, when p=PO, the current operating state is sufficient, so there is no output from the comparator circuit. When p>PO, a negative pulse is output from this comparator circuit CP and enters the motor control circuit, which is sent to the winding device 5.
The motor M that drives the motor M is decelerated. When p<PO, a positive pulse is output from the comparison circuit CP and enters the motor control circuit to speed up the motor M. In this way, the 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 it is equal to . In this embodiment, the number of revolutions of the fryer is counted as a digital quantity by a first pulse generator, and the traveling speed of the stranded wire is also counted as a digital quantity by a second pulse generator. Calculations of these digital quantities are counted as quantities,
Controlled by comparison.

However, it is also possible to adopt a modified embodiment in which, for example, a tacho generator is used to detect the rotational speed of the fryer using an analog value such as a voltage, and the winding speed is controlled by comparing the analog value and using a control circuit. As detailed above, the present invention utilizes a control circuit that includes simple counting, arithmetic, and comparison circuits to continuously measure the twist pitch of ongoing stranded wire manufacturing and to obtain a desired fixed pitch value. Since the measured pitch is controlled to match the fixed pitch value by comparison, it is possible to always accurately manufacture stranded wire with a fixed pitch. Further, even in a double twisting machine, there is no need for a gear-changing capstan, and 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 twisting pitch is achieved at any time.

[Brief explanation of the drawing]

Fig. 1 is a simplified side view showing one embodiment of the present invention;
The figure is a block diagram used in this invention. 2... Flyer, 4... Measuring wheel, PG,... First pulse generator, PG2...
... Second pulse generators 1C1, C2 ... Counting circuit, A ... Arithmetic circuit, CP ... Comparison circuit.

Claims (1)

[Claims] 1 (a) A first pulse generator (PG_1) installed in the flyer 2 of the wire stranding machine and generating a constant pulse for each revolution of the flyer; (b) A first pulse generator (PG_1) installed in the middle of the product stranding wire a second pulse generator (PG_2) that generates a constant number of pulses per rotation of the measuring wheel 4 and the measuring wheel; and (c) pulses generated from the first and second pulse generators within a certain period of time. A first counting circuit (C_1) and a second counting circuit (C_
2), (d) an arithmetic circuit A that inputs the number of pulses n_1 and n_2 counted by the first and second counting circuits, respectively, and calculates p=n_2l/n_1; and (e) a desired pitch p_0. (f) a signal corresponding to the calculated pitch value p input from the arithmetic circuit and a constant pitch value p_;
a comparison circuit that compares the signal with a reference signal corresponding to 0;
1. A constant pitch stranded wire manufacturing apparatus, comprising: a motor control circuit that controls a motor M that drives a winding device of a stranding machine in accordance with an input signal from the comparison circuit.