JPH0133248Y2 - - Google Patents

Description

[Detailed description of the invention] (Applied industrial field) This invention relates to a linear processing machine, and more specifically, it is an improvement of a processing machine that linearly processes anisotropic magnetic materials.

(Prior Art) Straight line processing refers to the operation of removing bends from a raw material wire rod in a direction intersecting the longitudinal direction. To this end, it has conventionally been common practice to apply torques in opposite directions to the wire by means of two sets of block units that are spaced apart upstream and downstream in the feeding direction of the raw material wire. FIG. 4 shows an example of such a conventional linear processing machine. The raw material wire W is drawn out from the roll 1, processed into a straight line by a piece unit 2 on the upstream side in the direction of movement and a piece unit 3 on the downstream side, and drawn out by a drawing roller 4 to the exit side. Each piece unit is composed of three pieces, and the pieces at both ends and the piece in the middle are pressed against the wire W from the opposite side of the wire W, and the three pieces work together in a predetermined direction with the wire W as an axis. Rotate to. The upper unit 2 on the upstream side and the upper unit 3 on the downstream side rotate in opposite directions to apply torque in opposite directions to the wire rod, and as a result, the wire rod W is pulled out in a straight line as if being squeezed between the rotating pieces. Processed.

By the way, if the pressing forces of the frame units 2 and 3 on the wire W are the same and the rotational speeds are the same, the torques in these opposite directions will be balanced, and the wire W will not be twisted on the drawing side downstream of the drawing roller. However, in reality, there will be differences in the pressing force of the pieces against the wire W due to wear of the pieces, and variations will also occur in the rotational speed. Therefore, in many cases, the above-mentioned torque balance is disrupted and the wire is inevitably twisted on the exit side. When the wire W is made of a processed anisotropic magnetic material as described above, when such twisting occurs, the magnetic properties etc. are distorted and deteriorated.

(Purpose of the invention) The purpose of this invention is to prevent deterioration of characteristics due to twisting during straight processing of wire rods.

(Basic configuration of the invention) A rotation detector equipped with a rotary encoder that detects the magnitude and direction of twisting rotation of the wire rod is provided on the downstream exit side of the pull-out roller, and one of the two sets of unit units is brought into pressure contact with the wire rod. An adjustment piece is used as a compensation piece unit that is provided in addition to a normal piece, and the contact pressure of the adjustment piece against the wire is increased or decreased depending on the magnitude and polarity of the rotation detection signal output by the rotation detector when the twisted rotation of the wire is detected. This is how it was done.

Figure 1B shows an outline of the straight line processing machine of this invention. On the downstream side of the wire roll 1, there are two rolls spaced apart from each other.
A pair of frame units 2 and 3 are provided, one of which is used as the above-mentioned adjustment frame unit 20. A pull-out roller 4 is provided downstream of these frame units. Furthermore, a rotation detector 10 equipped with a rotary encoder 19 is provided on the downstream side of the pull-out roller 4 so as to engage with the straightened wire.

What is shown in FIGS. 2A and 2B is a rotation (about the central axis) detector 10 of the wire W, which is provided on the exit side downstream of the pull-out roller 4 in FIG. Bearing 12 on stand 11
A circle 13 extends concentrically with the travel path of the wire W and is rotatably supported. Cylinder 13
Inside, the path of the wire rod W is in between, and the left and right 1
A pair of support plates 14 are fixed, and these support plates 14
A pair of upper and lower nip rollers 16 are provided so as to sandwich the wire W therebetween. These nip rollers 16 are supported by the support plate 14 so as to be able to move up and down slightly, and are maintained in a state of elastic pressure contact with each other by a tension spring 17. A shaft 18 extending from the end of the cylinder 13 is a rotary encoder 19
inserted inside. rotary encoder 19
Use commercially available products as appropriate.

When the wire W is twisted (that is, when the wire W rotates), the cylinder 13 and its shaft 8 are accordingly
rotates, the direction and magnitude of this rotation are detected by the encoder 19, and a rotation detection signal having a magnitude and polarity corresponding thereto is output.

What is shown in FIG. 3 is a compensation unit 20 which operates in response to this rotation detection signal, and is intended to replace the unit shown in FIG. The compensation unit 20 as a whole rotates about the traveling path of the wire W, but its rotational structure itself is well known and is therefore omitted from the drawing.

There are three groups of pieces arranged in the inner part of the cylinder 21, and the ones at both ends are screwed pieces, which are the same as the conventional ones. One piece 22 in the center piece group is screwed to the cylinder 21, but the adjustment piece 23 located on the opposite side of the wire W has its tail pressed against the cylinder 24.
It is housed so as to be able to move forward and backward into the interior, and its head abuts against the wire rod W. The inner chamber of the pressing cylinder 24 is connected to a suitable pressure fluid source via a flow path 26 and a fluid supply ring 27. That is, since the adjustment piece 23 is pressed against the wire W by fluid pressure (for example, oil pressure), when the fluid pressure increases, the pressing force increases, and when the fluid pressure decreases, the pressing force decreases. This adjustment of the fluid pressure is achieved by performing known valve control on the fluid supply path in response to the rotation detection signal described above. Since the cylinder 21 is rotating but the fluid supply ring 27 is stationary, the fluid supply ring 27 is provided with a suitable mechanical seal in order to transfer pressure fluid between the two without leakage.

The twist prevention control operation in the linear processing machine of this invention is performed as shown in FIG. 1B.

First, the rotation detector 10 detects the twisting rotation of the wire W, and this rotation detection signal is sent to the central processing unit.
It is sent to the CPU where the magnitude and direction of the twisting rotation are read. Then, a fluid pressure value at which the magnitude of this torsional rotation becomes zero is determined, and a corresponding pressure fluid is supplied to the pressure cylinder 24 and the adjustment piece 2
The contact pressure on the wire W of No. 3 can be changed. In other words, if there is no torsional rotation, the contact pressure will remain as it has been up to now. The direction of twisting rotation is indicated by the polarity of the detection signal. For example, if the rotation is clockwise, the polarity of the signal is positive and the contact pressure of the adjustment piece 23 is increased, and if the rotation is counterclockwise, the contact pressure of the adjustment piece 23 is increased. The polarity of the signal is negative so that the contact pressure of the adjustment piece 23 is reduced.

(Effect of the invention) Feedback control constantly controls the contact pressure of the piece against the raw material wire so that it is uniform, so the occurrence of twisting on the wire at the exit side is minimized, and deterioration of the characteristics of the wire is effectively prevented. Ru.

[Brief explanation of the drawing]

FIG. 1A is a side view showing the outline of the configuration of the linear processing machine of this invention, FIG. 1B is a block diagram showing the control operation in the processing machine, and FIG. Figures 2A and 2B are an end view and a partially sectional side view showing the rotation detector, Figure 3 is a side sectional view showing the compensation unit, and Figure 4 shows the general configuration of a conventional straight line processing machine. FIG. 1...Roll, 4...Drawer roller, 10...
Rotation detector, 16...Nip roller, 18...
Cylinder shaft, 19...Rotary encoder, 20
...Compensation piece unit, 23...Adjustment piece, 24
... Press cylinder, 27 ... Fluid supply ring, 2, 3 ...
Coma unit.

Claims (1)

[Claims for Utility Model Registration] The raw material wire W pulled out from the wire rod roll 1 is straightened through two sets of unit units 2 and 3, which are located upstream and downstream apart and rotate in opposite directions while in pressure contact with the wire. A rotation detector 10 equipped with a rotary encoder 19 for detecting the magnitude and direction of twisting rotation of the wire is provided on the downstream exit side of the drawing roller 4. One of the two sets of unit units is a compensation unit unit 20 which includes an adjustment unit 23 in pressure contact with the wire in addition to a normal unit, and a rotation detector outputs an output by detecting twisting rotation of the wire. A straight line processing machine characterized in that the contact pressure of an adjustment piece against a wire rod is increased or decreased depending on the magnitude and polarity of a rotation detection signal.