JPH0288723A - Annealing apparatus - Google Patents

Abstract

PURPOSE:To freely set velocity ratio of each electrode axis at high accuracy by detecting rotating angle of each electrode axis with each detecting means, supplying the detected signal to control means and controlling each servo-motor with the control means based on the detected result. CONSTITUTION:A wire rod supplied from a wire rod supplying part to an annealing apparatus 20 is continuously run with each electrode sheave 3-7 and plural pulleys, and also each electrode sheave 3-7 back signal is supplied to a servo-driver. The servo-driver obtains the deviation based on the feedback detected value and the reference value, and velocity control of each AC servo- motor 21-25 is executed so as to correct the deviation. By this method, the peripheral velocity of each electrode sheave 3-7 can be stably controlled at high accuracy, such as + or -0.05%. Further, in spite of any shape of the wire rod, the peripheral velocity of the electrode sheave 3-7 can be freely set.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention enables the speed ratio of each electrode shaft supporting a plurality of electrode sheaves to be set freely and with high precision, and also allows each electrode shaft to be individually set. This invention relates to an annealing device capable of forward and reverse rotation.

[Prior Art] Conventionally, when drawing a wire through a hole in a die of a wire drawing machine and processing it into a wire with the desired outer diameter and dimensions, the drawn wire undergoes work hardening. There were problems such as embrittlement and a decrease in electrical conductivity. Therefore, in order to improve such problems, in the wire drawing process, a method of in-line annealing using a continuous current annealing machine 1 as shown in FIGS. 2 and 3 is adopted. That is, the wire rods 2 supplied from the wire rod supply section (as shown) are placed in electrode sheaves 3.4.5 at, for example, five locations inside the annealing machine 1.
．． 6. 7 and a plurality of bobbles, and energize the wire 2 in contact with these electrode sheaves 3 to 7 to perform "preheating + annealing → cooling" → "reheating (draining)". Each process is performed.

In this case, pulleys 8A to 12A are attached to each electrode shaft 8 to 12 of the electrode sheaves 3 to 7, and each pulley 8A to
A belt 13 is wound around the electrode sheave 12A, and each electrode sheave 3 to 7 is rotationally driven by transmitting the driving force of the drive motor (the path shown) to the electrode shaft 10 of the electrode sheave 5. . At this time, since the sliding resistance of the wire 2 against the electrode sheaves 3 to 7 is large, the electrode sheaves 3 to 7 are forcedly driven. In addition, power is supplied to the electrode sheaves 4 and 6 from the outside via slip rings (paths shown), and the electrode sheaves 3.5.7 are grounded, and the potential difference between the electrode sheaves 4 and 3 is Vl. , electrode sheave 6 and electrode sheave 7
The potential difference between the two is v2.

In the figure, 14 is a reversing gear box, and 15 is a bearing.

By the way, troubles that occur during the annealing process in the continuous current annealing machine 1 include: (1) warping of the wire due to the tension of the wire between each electrode sheave, (2) disconnection of the wire due to sparks generated in the electrodes, etc. . Therefore, as a preventive measure for the trouble (2) above, there is a method of reducing the tension of the wire rod to zero as much as possible. In addition, as a preventive measure for the above ■,
There is a method of increasing the tension of the wire as much as possible, and by gradually increasing the circumferential speed of each electrode sheave to increase the tension, wire wobbling can be eliminated and sparks at each electrode can be eliminated. In order to solve the problems mentioned above at the same time, the circumferential speed of each wire should be set as follows, for example: peripheral speed of the wire entering the annealing machine 1 from the wire supply section = 100 peripheral speed of the electrode shaft 3A: 98 of the electrode shaft 4A Peripheral speed = 99 Peripheral speed of electrode shaft 5A: 100 Peripheral speed of electrode shaft 6A: 101 Peripheral speed of electrode shaft 7Δ: 102 The ratios are set as shown below, and each electrode is adjusted to maintain the tension of the wire appropriately. It is necessary to drive sheaves 3-7.

[Problems to be Solved by the Invention] However, the conventional continuous current annealing machine described above has the following problems.

Each of the electrode shafts is connected to a pulley attached to each electrode shaft (
a) V-belt or (b) timing belt is wound around and drives each of the electrode shafts at once, but (i) the above-mentioned (a)
) drive method using a V-belt: ■ It is difficult to set the circumferential speed of each electrode shaft on the order of 0.1% because the V-belt and pulley slip; ■ It is stable in the long term. ■ The internal space of the annealing machine is narrow, so belts such as V-belts and reversing gearboxes become complicated, resulting in poor maintainability; ■ The peripheral speed ratio of each electrode shaft varies depending on the dimensions of the wire. Although it is desirable to be able to adjust the adjustment, the conventional technology has drawbacks such as not being able to do so.

(u) The driving method using a timing belt as described in (b) above is as follows: ■ By varying the number of teeth of each timing boob around which the timing belt is wound, the difference in circumferential speed of each electrode shaft is reduced by 1%.
It is difficult to set the rotation speed in increments of less than If the surface becomes rough due to sparks, cut the outer peripheral surface of all other electrode sheaves that are not rough.

Since the electrode sheaves are used several times by maintaining an appropriate difference in diameter, they have drawbacks such as extremely complicated management of combinations of electrode sheave diameters.

The present invention solves the above-mentioned problems, and provides an annealing apparatus in which the speed ratio of each electrode shaft supporting a plurality of electrode sheaves can be set freely and with high precision, and each electrode shaft can be forward and reversed individually. For the purpose of providing.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a plurality of electrode sheaves and an electrode shaft that supports each of the electrode sheaves,
An annealing device configured to continuously run the wire supplied from the wire supply unit while being in contact with the outer peripheral surface of each of the electrode sheaves, and to energize the continuously running wire from each of the electrode sheaves to perform annealing. In the apparatus, a servo motor is provided for each of the electrode shafts and rotates the electrode shaft, a detection means is provided for each of the electrode shafts and detects a rotation angle of the electrode shaft, and a detection means is provided for each of the electrode shafts. The apparatus is characterized by comprising a control means for driving and controlling each of the servo motors based on the results.

[Function] According to the present invention, when the annealing apparatus is in operation, the rotation angle of each electrode shaft is always detected by each detection means, and a detection signal is supplied to the control means. The control means drives and controls each servo motor based on the detection results. Thereby, each electrode axis can be controlled in forward and reverse directions, and the speed ratio of each electrode axis can be controlled freely and with high precision.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic plan view showing the configuration of an annealing apparatus 20 according to this embodiment, and the same components as in FIG. 3 are given the same reference numerals to simplify the explanation. Numbers 21, 22, 23 in Figure 1
, 24.25 are AC servo motors, and each output shaft is connected to each electrode shaft 8, 9, 10,
11 and 12 via a coupling 19. That is, each of these AC servo motors 21 to 25 drives the electrode shafts 8 to 12 in forward or reverse rotation, and the speed thereof can be set digitally by a servo driver (control means, not shown). ing.

Furthermore, encoders 26, 27, 28, and 29° 30 are attached to the rotating shafts of the AC servo motors 21 to 25, respectively, and each electrode shaft 8 to 12 is driven by the AC servo motors 21 to 25. The rotation angle is detected. That is, when the rotation angle of each of these encoders 26 to 30 or each of the electrode shafts 8 to 12 is detected and the detection signal is fed back to the servo driver, the servo driver uses the fed back detection value and a preset reference value. A deviation is detected, and the speed of each AC servo motor 21 to 25 is controlled based on the deviation.

Next, the operation of this embodiment with the above configuration will be explained.

The wire supplied from the wire supply section to the annealing device 20 is continuously run by each electrode sheave 3 to 7 and a plurality of pulleys, and back signals of each electrode sheave 3 to 7 are supplied to the servo driver. The servo driver calculates a deviation based on the fed-back detected value and the reference value, and controls the speed of each AC servo motor 21 to 25 to correct the deviation.

Thereby, the circumferential speed of the electrode sheaves 3 to 7 can be controlled with stable high accuracy of ±0.05%.

Moreover, it becomes possible to freely set the circumferential speed of the electrode sheaves 3 to 7 regardless of the shape of the wire rod. Moreover, even if irregularities occur on the outer circumferential surfaces of the electrode sheaves 3 to 7 due to sparks, it is possible to freely set the circumferential speed ratio of each electrode sheave 3 to 7.

According to the above embodiment, each AC servo motor 26
Since the electrode shafts 8 to 12 are individually driven by the electrode shafts 8 to 30, the speed ratio of each of the electrode shafts 8 to 12 can be set freely and with high precision. In addition, each AC servo motor 26~
Since the electrode shafts 8 to 12 are individually driven by 30, it is no longer necessary to provide a reversing gear box as in the past, and the disadvantages such as the confusion of belts and reversing gear boxes can be separately driven. Since it is driven, there is no need to provide a reversing gearbox as in the past, and problems such as confusion between belts and the reversing gearbox can be solved.

[Effects of the Invention] As explained above, according to the present invention, the following effects can be achieved.

(i) It becomes possible to freely and accurately set the speed ratio of each electrode axis. Thereby, the annealing treatment in the wire drawing process can be performed satisfactorily.

(II) Since each electrode shaft is driven individually by a servo motor, the reversing gearbox that was conventionally attached to the annealing machine is no longer necessary, and the problem of complicated reversing gearboxes, seven belts, etc. as in the past can be prevented. can do.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing the structure of an annealing apparatus according to an embodiment of the present invention, Fig. 2 is a schematic side view showing the structure of a conventional annealing machine, and Fig. 3 is a schematic diagram showing the structure of a conventional annealing machine. FIG. 3-7... Electrode sheave, 8-12...
Electrode shaft, 20... Annealing device, 21-25...
...AC servo motor (servo motor), 26-30
...Encoder (detection means).

Claims (1)

[Claims] A plurality of electrode sheaves (3, 4, 5, 6, 7) and electrode shafts (8, 9, 10, 11,
12), the wire rod supplied from the wire rod supply section is continuously run while being in contact with the outer peripheral surface of each of the electrode sheaves, and the wire rod being continuously run is annealed by being energized from each of the electrode sheaves. In the annealing apparatus configured to perform the following, servo motors (21, 22, 23, 24, 25) provided for each of the electrode shafts and rotationally driving the electrode shafts;
detection means (26, 27, 28, 29, 30) provided on each of the electrode shafts and detecting the rotation angle of the electrode shaft;
An annealing apparatus comprising: control means for driving and controlling each of the servo motors based on the detection results of each of the detection means.