JPS6182939A - Steel wire bend straightening device - 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]

[Industrial Application Field] The present invention relates to a bend straightening device for a magnetic steel wire, and more particularly to a bend straightening device for automatically straightening the bend in a steel core wire of a coated welding rod. [Conventional technology and problems] Steel wire rods, for example, core wires of coated welding rods, do not have 9 bends;
In other words, good straightness is required. If the core wire is bent, wire clogging will occur during the coating process, making it impossible to paint.Also, even if the core wire can be painted, the core wire will not be located in the center of the coating material, resulting in an eccentric state, resulting in poor weldability and poor quality. It becomes a coated welding rod. The conventional technology will be explained with reference to Part 1a (excluding the detection end 23 of the position detection device).
4 in its axial direction (z) and the X direction perpendicular to each other,
It passes through a bend straightening device consisting of each straightening roller unit 22, 21 in the y direction. It is cut into a predetermined length using a cutting machine and pooled in a hopper. Then, a predetermined amount of core wire is extracted from this hopper and mechanically or visually inspected for bending of the core wire.If bending of the core wire is confirmed as a result, the transfer of the core wire is temporarily stopped. In this method, the operator manually adjusted the correction roller. Such conventional technology has the following problems. (1) Since the bending test of the core wire is not carried out all the time but periodically, it is not possible to prevent the occurrence of bends between the time when the cable bends and the time when the test is carried out, resulting in a low yield. (2) Adjustment of the straightening roller is carried out by temporarily stopping the transfer of the steel wire, so the operating rate of the straightening device is low and the production amount of welding rods is low. (3) Adjustment of the straightening roller requires skill, and even for a skilled person, since the core wire itself is cut and separated from the steel wire,
Which correction roller (X direction roller, X direction roller) and which direction (+x, -X direction or +'j t Y direction)
It is difficult to determine whether to adjust the [Means and operations for solving the problems] The present invention aims to solve the problems of the above-mentioned prior art. In order to achieve this object, the present invention is configured to automatically detect the bending of the steel wire and automatically adjust the rollers of the straightening device. That is, in a device that straightens the bend of a steel wire by transporting the steel wire in its axial direction (two directions) and passing through mutually orthogonal X-direction and X-direction straightening roller units: X- and y-direction straightening roller units the specified roller in the X direction. Each unit is movably supported in the X direction; the X direction support member and the X direction support member are connected to the X direction drive system and the X direction drive system, respectively; The detection ends of the body position detection device are arranged in parallel, and the X position detection amount and the The configuration is such that the bias is applied in the direction in which the deviation becomes zero. Next, the present invention will be explained in detail using the drawings. FIG. 1a is an overall view of an embodiment of the present invention, and FIG. 1b is a sectional view thereof taken along the line rB-IB. In the drawing, 24 is a steel wire rod to be straightened. 20 is a correction roller device that corrects the steel wire 24 while conveying it in its axial direction (L direction). The correction roller device 20 includes an X-direction correction roller unit 21 and an X-direction correction roller unit 2.
2, and the steel wire rod 24 is transferred from left to right in the drawing.
is sequentially passed through the X-direction correction roller unit 21 and the X-direction correction roller unit 22 to correct the bending of the steel wire 24. FIG. 2 shows the X-direction correction roller unit 2 shown in FIG. 1a.
1 is shown enlarged. Referring to FIG. 2, the method of adjusting the correction roller for correcting the bending of the wire 24 will be explained.
The straightening roller unit 21 has 15 rollers arranged in a staggered manner, and the roller group holds and suppresses the steel wire 24 to correct the wire rod measurement in the X direction. divided into two groups. That is, [Group a] Rollers 1 and 2 The part where the wire is introduced (fixed)

[B group]

Rollers 2, 3, 4, 5.6 Remove any irregular bends in the X direction that the wire itself already has,
Part (movable) that gives a certain bend to the wire again

[Group C]

Rollers 6.7, 8, 9.10 Remove the bending deformation imparted to the wire by group b,
Part that gives approximately straightness to the wire (fixed)

[d group]

Rollers 10, 11, 12, 13.14 A part (movable) that actively imparts a small bend in the X direction to the wire rod, which has been given approximately straightness by the C group.

[C group j Rollers 14, 15 Parts that correct the bend of the wire given by the d group and finally give straightness in the X direction (fixed) Among these groups a to c, those directly related to the bend of the wire is the d group, and in the present invention, when a bend is detected in the wire, the rollers of the d group are moved in the y direction (the y direction or the -y direction).
Adjust by moving in the force direction. For example, when a bend occurs in the wire in the direction of the dotted line α, the roller 11 or 13 is moved in the +y force direction (upward in the paper), or the roller I2 or 14 is moved in the +y force direction, and similarly the wire is bent in the direction of the dotted line β. When this happens, move the roller 11 or 13 in the -y force direction (downward in the paper) or move the roller 12
Or move 14 in the -y direction. This is Laura's 21
It is in order. FIG. 3 shows a roller support member 26 for adjusting the correction roller 13. As shown in FIG. This roller support member 26 may be attached to one of the correction rollers 10 to 14 of the d group, and in the illustrated example, it is attached to the roller 13. In FIG. 3, reference numeral 25 is a unit 1 base for holding the roller group, and the support member 26 is a shaft body supported by the base 25. A roller shaft 27 is provided eccentrically on this shaft body 26, and the roller 13 is fixed to the roller shaft 27 with a fitting nut. An arm 29 is fixed to the end of the shaft body 26 opposite to the roller shaft 27 with a spring washer 30 interposed therebetween. An actuator of a y-direction linear motor Ly is coupled to the arm 29. Due to this combination, as the actuator of the linear motor Ly is pushed out, the arm 29 moves toward the front in the drawing with the shaft body 26 as the center. Further, the roller configuration, adjustment method, and roller support member for moving the correction roller in the X-direction correction roller unit 22 are the same as those in the y-direction described above, and the correction roller is moved by an X-direction linear motor Lx (not shown). Adjust the movement in the X direction. Referring again to Figures 1a and 1b, 23 is x,
y This is the detection end of the two-dimensional magnetic body position detection device. The detection end 23 is arranged near the wire exit end of the straightening roller device 20 so that the wire 24 passes through a non-magnetic (ceramic) cylinder 36 . The ceramic cylinder 36 is inserted into a non-magnetic coil holder 37, and the holder 37 has a cross-shaped hole centered around the axis of the ceramic cylinder 36, and a magnetic position detection core 3g is inserted into these six holes. , ~384 are inserted. Each core has a primary coil (excitation coil) and a secondary coil (
It passes through coil bobbins 391 to 394 around which the detection coils are wound. These bobbins39. ~394 are held down by magnetic links 11 via rubber rings 40. Cores 381-38. The 1° end of i is screwed into a ring 40, and their tips are aligned with the outer periphery of the ceramic cylinder 4 by screwing. . FIG. 4 shows the configuration of the primary coil and secondary coil wound around the coil bobbins 391 to 394, an electric processing circuit that obtains a signal indicating the position amount from the detected voltage thereof, and a drive system control device. Primary coils 421-424 and secondary coils 431-134 are wound around each of the magnetic cores 381-;)84. An alternating current voltage with a constant frequency (for example, UZ at 5) and a constant level is applied to the primary coils 421 to 424 from a constant frequency generator 411N R:y 44,
The coils 1121 to 424 are connected to the core 38t r at the same time.
The winding direction is such that the tips of the cores 383 are magnetized with the same polarity, and the tips of the cores 382 and 384 are magnetized with the opposite polarity. As a result, core 381 - core 382 - ring 41
(first magnetic flux loop), core 382-core 383-ring 41 (second magnetic flux loop), core 383-core 384
- ring 41 (third magnetic flux loop) and core 38; - ring 41 (fourth magnetic flux loop);
The magnetic flux alternates in the set of magnetic flux loops. As shown in FIG. 4, the secondary coils 431-43 are wound around the tips of the cores 381-384. and 4
The output terminals of 33 are determined so that they both generate voltages of the same polarity at the same time, and output terminals of 43□ and 434 are determined so that they generate voltages of the same polarity at the same time. Secondary coil 43. A rectifier and a bandpass filter 45 . .about.454 are connected, and their outputs are connected to amplifiers 46. to 454, respectively. ~46,L
The output of the amplifier 461 is applied to the positive input terminal of the differential amplifier 471, the output of the amplifier 463 is applied to the negative input terminal, the output of the amplifier 464 is applied to the positive input terminal of the differential amplifier 472, and the output of the amplifier 462 is applied to the positive input terminal of the differential amplifier 472. is applied to the negative input terminal. When the center of the steel wire (core wire) 2.1 is at the intersection of the axes of the cores 381 to 384, the output voltages of the coils 131 and 43J are equal, and the output voltages of the coils 43□ and 434 are equal. As a result, the output voltages of amplifiers 461 and 463 are equal, and the output voltages of amplifiers 462 and 464 are equal, but since a predetermined bias voltage is applied to the positive input terminal of differential amplifiers 471 + 472, the differential amplifier 4
7. , 472 indicate a predetermined level. These indicate offset positions Δy=Q and Δx=0. If the gold steel wire 2/I is shifted in the +y force direction Ly, the steel wire 24 is farther away than the core 383 and closer to the core 381. The magnetic fluxes of the first and fourth magnetic flux loops (■, r) (Fig. 4) increase, and the magnetic fluxes of the second and third magnetic flux loops (■, ■) decrease, so that the output voltage of the amplifier 4621464 is almost Although it does not change (or even if it does change, the bell changes in the same direction), the output of amplifier FIH 461 increases by 67 minutes, and the output of FIH 463 decreases by 61 minutes.Therefore, differential amplifier 4
The output of 71 causes a voltage rise of the predetermined level plus 2Ly. That is, it shows a voltage increase with high sensitivity to Ly. Conversely, when the steel wire moves closer to the core 383, a voltage drop of 2Ly from the predetermined level occurs. The same holds true for the displacement in the
When it approaches X, it shows a drop of 2Δχ from the predetermined level. In this way, the differential amplifier 47. The output 472 indicates the steel wire position in the y direction, and the output 472 indicates the steel wire position in the x direction. Note that if the bias voltages of the differential amplifiers 471 and 472 are omitted (zero), the differential amplifiers 47, , 4'1
The output No. 2 indicates the offset position from the center position. The above bandpass filter 45. ~454 to differential amplifier 4
The circuits up to 7+ and 47□ constitute the electrical processing circuit of the position detection device. Next, the amplifier 48 of FIG. , 482 and below, the configuration and operation of the drive system control device will be explained as follows.
．． and 472 are connected to amplifiers 481 and 472, respectively.
82 and A/D converters ADy and ADx.
The A/D conversion coat is applied to the microcomputer M.
Applied to PU. The microcomputer MPU is controlled by human power Δ+B+
According to each state of C, read the eyes (vote position Mx, My settings, one input data x, r), y, and average value D.
Calculation of xm and Dym ↓C1 Displaying them on the character display CD (4"i>, difference between target value and average value (error; M x D x m + ~ Iy - Dym) Based on or near motor [,
. It controls the energization of Ly, etc. Microcomputer (hereinafter referred to as microcomputer) Ml)
U still has theta even after shutting off 12 sources! 3: Reading of non-volatile semiconductors to create and maintain J! :A memory NRA h-1 is connected, and this nonvolatile memory N1. ;, A~
Memory refresh, that is, data retention control is performed by the battery backup element 50 which receives the supply + and -(f of the secondary battery 49. The R and OM of the microcomputer MRU have the program for performing the above-mentioned replay and control. The operation flow based on the program is shown in Fig. 5. An outline of the operation of the microcomputer MPU corresponding to the states of control inputs A to C given to the microcomputer MPU is shown in Fig. 6. For reference, when the microcomputer MPU is powered on, it initializes its output capo-1, and
RAM memory data Mx (previous target X position data)
and My (previous target y position data) are read and output set on the character display CD. This allows the CD
Mx and My are displayed. In addition, Mx, My or N R
If it is not in A M, the display is rooOJ with X and ro with y.
It becomes 00J. Next, the microcomputer MPU waits for the control input A to become "1", and by then the switches Sxu (Mx up instruction) + Sxd (Mx down instruction). 5yu (My up instruction) and Syd (My down instruction) are monitored. In this state, the operator M x
+ When you want to change ~1y, perform these operations. When S x u is closed, M P IJ
Add 1 to the ~4x data of NR/\N1 to make Mx+1, update the memory as Mx, and 1. Output latches the second Mx to I) on the character display, and then set the time [
The Progera 11 timer of l is turned on (executed), waits for time l to expire (time limit [1 completion), and returns to monitoring the switch open. Further, when S x I+ is closed, the same process is repeated and ~IX is increased by 1 at intervals of t1. 11 is operator Z! Indication (1) It is said that it is a relatively long time (for example, t 1 "0.5 to 1.5 seconds) in which the switch can be opened after visual recognition. When Sxd is quiet, M x are sequentially decreased by 1.Syu is for increasing MY set, Syd is for decreasing MY cents, and when these are open, the MPU operates in the same way as described above.Control input A? When it becomes "1", MPU stops monitoring the switch closure as described above and waits for control input B to become rlJ. When sampling pulse b arrives (B = rlJ). MPU stores it in NRAM. Throw away the fortune-telling DxB of the X position sampling values Dxl to DxB from the past 8 times, set Dx!-Dx7 as Dx2-DxB, and set the xf-ta Dx currently arriving at the human-powered boat as DxH as N. The data is stored in RAM M, the average Dxm of D x 1 to Dxg is calculated, and the average value data stored in NRAM is updated to Dxm. That is, the sampling value Dxl
~Dx (Updated 3 to 8 times including this time,
Along with this, the average value is also updated. Then, the y-position sampling values are updated in the same way, and their average values are also updated. Then, the average values Dxm and Dym are displayed on the character display C.
Output latches to D. As a result, the measured average value is displayed on the CD instead of the target value, and from then on, while the control input A is "1", the displayed value changes according to the actual measurement value in synchronization with the sampling pulse B. The average value of the sampled values is displayed. Each time the average values Dxm and Dym are output set (display updated) to the display CD, a time limit t2 ('t2
turns on (executes) the program timer (larger than the "1" width of pulse B2 and smaller than its period), and after the time has elapsed, the control human power C is looked at and the input signal B3 is seen. The interval t2 between f+ and '1 is so that one reading and data update are performed per pulse of sunblink pulse B.7 Control manual power A is rlJ and control manual power C
As long as rQJ, the same 1υ as the sampling pulse 13
1 then 1llll + constant de~ri1. ) x. oy reading and N RΔM theta Dx1~1 XIJ
The updating of +Dxm+ Dy + ~L) yo + r) ym and the display update are continued. When the control human power C becomes rN, the deviation ~lx-Dxm and My-1,
y m 3 calculations and each D/A converter DAOx
and latches the output to oAay. As a result, control human power C
is "1", the target value ~1x, ~1y and the measured average value D
x m. Self-j control is performed to make the deviation of Dym zero, and when the deviation is large, the output voltage of amplifiers 5] + and 512 is high, and the driving force of linear motors Ly and l-x is strong, causing arm (
29) is slow if the rotation is fast and the deviation is small. In this embodiment, as described above, since the average value of the past eight sampling values is used as the feedback value, unstable fluctuations due to vibration of the 1wI wire are offset, and stable and smooth feedback control is performed. Furthermore, since the target value can be set arbitrarily, the optimum score per vote value can be set based on past results. Furthermore, past data
Since I<ΔM is stored in memory, even after the control system power is turned off. Start operation with the same settings as before. Note that in order to simplify the drive system control device, the differential amplifier 4
7+, 477 outputs respectively to amplifiers 5]1゜51
2 and the amplifier 47. , 472 are omitted. Also, in this case, 471°47
2, and compared the absolute values of those outputs with a predetermined level. When the former exceeds the latter, it corresponds to a positive output. The linear motors Ly and LX can be changed to hydraulic cylinders or pulse motors.When using hydraulic cylinders, the deviation ~ I x
-D x m, M y - [J y m (The switching direction of the switching button t may be determined using magnetism to determine the opening degree of the crosspiece jf, or the deviation or predetermined value If it exceeds, the switching direction is determined by the deviation storage property and the constant short +1.'1
The opening/closing valve may be opened between 8 and 8. In a simple embodiment, this is done based on the outputs of the differential amplifiers 471 and 472 (however, the bias on the input side is omitted). When using a pulse motor, it is the same as when using a hydraulic cylinder, and if we read the switching direction as the rotation direction, the throttle opening as the drive pulse frequency, and the opening of the on-off valve for a certain period of time as the application of a 1-step drive pulse. good. [Effects of the Invention] As detailed above, one aspect of the present invention is to detect the bending of the steel wire by the detection end of the magnetic body position detecting device disposed immediately after the straightening roller device, and to detect the bending of the steel wire by the detection end of the magnetic body position detecting device disposed immediately after the straightening roller device. This system automatically adjusts the roller position by feeding back the information to the operator, and can eliminate all the various problems caused by conventional manual work.

[Brief explanation of drawings]

FIG. 1a is a side view showing an outline of a mechanism section according to an embodiment of the present invention, and a part thereof is shown in cross section. Figure 1b is the IB of Figure 1a.
-IB sectional view, and FIG. 2 is a side view showing the arrangement of rollers of the correction roller unit 21. FIG. 3 is a front view showing the roller support member, and a portion thereof shows a cross section. FIG. 4 is a block diagram showing the configuration of the electric processing device and drive system control device of the magnetic body position production device 23, and FIG.
6 is a flowchart showing the operation of the microcomputer MPU, and FIG. 6 is a time chart showing the control inputs A-C input to the MPU and an overview of the control operation of the MPU. 2Q: Straightening roller device

Claims (1)

[Claims] A straightening roller that straightens the bends in the transported steel wire, which comprises means for transporting the steel wire in its axial direction (z), and other straightening roller units in the x and y directions perpendicular to each other. In an apparatus for straightening bends in a wire, the apparatus includes: Predetermined rollers of the x-direction and y-direction correction roller units are supported movably in the x-direction and y-direction via support members on each unit base; and the y-direction support members are connected to the x-direction drive system and the y-direction drive system, respectively; detection ends of the x and y two-dimensional magnetic body position detection devices are arranged in parallel to the roller unit; The x-position detection amount and the y-position detection amount from the electric processing device are applied to the drive system control device to urge the x-direction drive system and the y-direction drive system in a direction in which deviations in the x-direction and y-direction become zero. A steel wire rod straightening device characterized by: