JPS58103914A - Wire heating device - Google Patents

Abstract

PURPOSE:To efficiently manufacture a steel plate having excellent accuracy, by synthesizing both motions of a travelling carriage and a cross-carriage moving along said carriage, and automatically performing plural lines of wire heatings in the optional directions and at optional intervals. CONSTITUTION:A control panel 31 controls the mutual distances between several wire heating tools 15, the heights of the tools 15 and a steel plate 11, the travelling speed of a carriage 18, the motion of a measuring tool 22 travelling along a rail 29, the moving direction (wire direction) of the tools 15 against the standard line 13 of the plate 11, the moving speed of the tools 15, the supplies of gaseous oxygen and fuel gas, etc., electric power and cooling water, etc. for the tools 15. A graphic display device 33 incorporates a computor, and indicates corrections, etc. by comparing the measured values with the target ones, about the position, mutual distance of the tools 15, heating direction of the plate 11 against the standard line 13, and the bend and torsion of the plate 11 after performing the wire heating work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire heating device that is capable of automatically subjecting a steel plate to desired bending and twisting, and more particularly relates to a wire heating device that is mounted on a carriage that can run in the longitudinal direction of a steel sheet. Several filament heating devices are installed so that the mutual spacing can be set freely,
By giving certain instructions to these carriages and the filament heating device, it is possible to simultaneously heat any number of filaments in any direction by combining the movement of the carriage and the movement of the filament heating device moving on the carriage. The present invention also relates to a wire heating device that can automatically bend and twist a steel plate to a certain degree.

Conventionally, as shown in FIG. 1, a steel plate has complicated bends and twists, which are used for a ship's outer plate. Steel plates and shaped steel were bent in a furnace, or by partially baking and hammering.

The steel plate is heated to 900°C to 950°C for round firing.

It was placed on a pillow made from a steel bar made to match the transparent or box shape, and was then shaped by hammering. This method was continued until the 1950s for sharply curved outer panels such as the boss plate of the ship's hull.

To bend a steel plate by partially baking it, the plate was fixed on a Minenosu surface plate with jacks, heated locally with a gas burner or heavy oil burner, and used to shrink as it cooled. In the past, many of the curved outer panels of ship hulls were bent by this method, but it was difficult to select the heating position, heating method, how to use cooling water,
The location and method of hammering relies heavily on experience and intuition. One task, such as the tendency to cause cracks if the heating temperature or timing of heating is incorrect, was carried out solely based on experience and intuition.

After that, this plate bending method using point heating in parts of the round roast was replaced by a wire heating device, and wire heating is now mostly carried out manually for dusting.

The solid lines in the longitudinal direction on the steel plate or shape steel in Fig. 1 are the reference lines for bending and torsion, and the several parallel dotted lines that intersect with this reference line are the filament heating lines. When each filament heating wire was overflowing and filament heating was performed, predetermined bends and twists as shown in the lower row were formed due to K. Therefore,
Conventional work is inefficient because the operator only operates one or two sets of wire heating tools set with heating burners and water cooling nozzles, and the work requires only two wire heating wire positions. The speed and method of applying heat all depended on experience and intuition, so there were many individual differences and it was not possible to carry out the process accurately.

This method had the drawbacks of poor work efficiency and the inability to mass-produce high-precision steel plates at low cost.

Next, to explain in simple terms the principle of bending and twisting a steel plate or shaped steel by heating a wire, in Figs.
By running a heating tool 2 consisting of a II propane flame or an electric rust induction heater, and a cooling water supply pipe 3, the steel plate 1 is locally heated and thermally expanded to form a bulged portion 4. At the same time, this part is rapidly cooled with cooling water, and the heated part is contracted while leaving the bulging part 4 to form a θ angle bend in the steel plate 1. Furthermore, the surface of the steel plate 1 is bent by a reference provided at the center of g. By running the heating tool 2 and the tube 3 at an α angle with respect to the line 5 to provide the linear heating line 6, the steel plate 1 has a base line 7 before heating and a base line 7 orthogonal to the reference line 5 before heating and after heating. A desired twisting and bending process can be performed by forming a twisting angle φ defined by the base line 7' of .

Bending of steel plates such as hull outer panels up to quadratic curved surfaces can be mass-produced by pressing, roll homing, etc., but it is possible to mass-produce automatically leveled products in addition to bending, such as twisting and deflection. When it comes to three-dimensional curved surface machining! As shown in Figure 6, the neutral axis 8 is often located outside the steel plate 1, and therefore it is difficult to process this by press working or roll homing. The reality is that it has not been fully implemented. In the figure, 9 is a neutral axis plane passing through the neutral axis 8, and 10 is an intersection line between the neutral axis plane 9 and one plane.

The device according to the present invention relates to a completely new technology developed in view of these drawbacks of the conventional technology.

To specifically explain one embodiment of the present invention with reference to the drawings, the seventh embodiment
In the figure, 11 is a steel plate to be processed placed on a processing table 12, and 15 is a reference line for bending and twisting provided on the surface of this steel plate 110.

Further, reference numeral 14 denotes a linear heating wire heated by a heating tool 15, which will be described later. Reference numeral 16 designates running rails laid on both sides of the platform 12, and is configured such that a running saddle 17 can run on this V-rull 16, and 18 indicates the running saddle 1:i.
(c) A bridge-fixed frame-like carriage, and this carriage 18 is connected to the rail 16 by a drive motor and a speed reduction mechanism 19.
It is constructed so that it can be run on. Reference numeral 20 denotes a frame having a beam structure which is pivotally attached to the carriage 18 via a pin 21 and whose angle can be changed parallel to the reference @ 13 of the steel plate 11, and which is connected to the heating tool 15 described above or to be described later. Guide surfaces for guiding the measuring tool 22 are provided on both sides thereof. 26 is a cross saddle, and a cross rail 24KG provided on the front side of the frame 20 moves the filament heating tool 15 in the direction of the steel plate 110 reference line 13 by a drive system 25 provided in the saddle 26. It is structured in such a way that it can be done. Further, reference numeral 26 denotes a holding hole which is attached and fixed to the cross saddle 26, and the # numbered heating tools 15 are held by this holding hole 26. Therefore, the heating devices 15 are moved over the holding bar 26 by means of a holding device 27, either manually or by means of an individually mounted electric motor (not shown); By keeping the heating tool 15 at the same temperature and moving the heating tool 15 up and down,
5 and the surface of the steel plate 11 can be kept constant. As a means for keeping the height of the heating tool 15 constant, there is a conventionally used electric up-and-down device using feedback control linked to a known set, or a floating hinge structure and a steel plate in the moving direction of the processing tool. Means such as surface guide rollers can be used.

Next, 28 is a cross saddle that is guided by a cross rail 29 provided on the side of the bale of the frame 20, and is driven by a drive system 30 attached to the cross saddle 28.
The measuring tool 22 is configured to be able to run along the rail 29 at a height that allows the height of the steel plate 110 surface attached to the rail 29 to be detected.

Further, numeral 31 is a control panel section capable of controlling the entire apparatus as described above, and the distance between the several filament heating tools 15 mentioned above and the height between the heating tools 15 and the steel plate 11.

The traveling speed of the carriage 18, the measurement tool 22 is the rail 29V
The movement of the heating tool 15 as it travels along with the CG, the moving direction (111-thread heating direction) and moving speed of the heating tool 15 with respect to the reference line 13 of the steel plate 15, and the oxygen to the heating tool 15.

It is configured to be able to control all of the supply of fuel gas, electricity, cooling water, etc. Further, 32 is the operation section on the control panel surface, and 66 is the position of the filament heating device 15.

A graphic with a built-in computer that can display the distance between the heating odors 15, the heating direction with respect to the reference line 15 of the steel plate 11, the corrected value by comparing the actual measurement and target value of bending and torsion after the filament heat processing, etc. It is a death blur device.

In the above embodiment, the steel plate 1 is rotatably attached to the carriage 18 by the pin 21 of the frame 20.
Although the frame 20 is aligned with the reference line 13 of the steel plate 1, it is also possible to fix the frame 20 and place the steel plate 1 on the processing table 12 so that the reference line 16 of the steel plate 1 aligns with the bridge 20. Moreover, if a computer is built into this device and the standards of the steel plate 11 and the device are transferred, the heating tool 15 and the measuring tool 22 can be directly connected to the carriage 18 km without using the frame 20.
It is also possible to hang it. Furthermore, when processing a large amount of steel plates, as mentioned above, rather than using one device to perform twisting, measurement, bending correction, and measurement, etc., it is recommended to use a set of two devices [1,...
It is much more efficient to use the No. 811 device to perform the twisting and burr processing using multiple heating tools, and to use the second device to perform measurement and correction work.

Next, the basic principle of operating this apparatus having the above-mentioned structure will be explained in detail as follows.

First, in @5vAK mentioned above, if the torsion angle is φ, the bending angle due to the wire heating conditions is θ, and the angle of the wire and heating wire 6 is α with respect to the reference line 5, then the following formula holds true. do.

T'anφ=(sin θ)x (cos α) Since θ and φ are very small angles, they can be approximated by the following equation.

φ temple θ・cosα・・・・・・・・・・・・−・
...Formula (1) Figure 8 shows the structural front diagram of the hull.

In the figure, reference numeral 64 indicates a frame line, and reference numeral 65 indicates an outer plate constituting the hull, which are objects to be twisted and bent according to the present invention. Further, Φ indicates the twist angle at both ends of this outer plate 65. Therefore, the relationship between the torsion angle Φ and the linear heating method is given by the above equation (1) as follows: Φ=φ1+φ2+...
・・・・・・・・・・・・Umbrella θ (cosα1+CO
8α2+...cosαi) Umbrella θm: COSα
i・・・・・・・・・・・・・・・・・・Formula (2
) % formula % The number of filament heating wires 60 applied to the surface of the outer panel 35,
Φ=nθ·cosα...Song...Song equation (3) is obtained.

If the twist angle is uneven, the angle α of the linear heating wire 6 is constant K.
By changing the line spacing of L and the heating IA6,
That is, the number of heating threads can be approximately determined by the above formula (2), by setting the heating threads at locations with large twists and spacing them at locations with small twists.

Note that the number n of the threads in the above equation (3) K does not have to be an integer (the irregular portions can be adjusted by adjusting the length of the heating lI6).

Even if we change θ by K, or by changing a, K
Therefore, implementation is possible.

FIG. 9 is a diagram showing the relationship between linear heating and bending. If the radius ■ is the central angle of the bend, then approximately.

■Monkey-8a-・・・・・・・・・・・・Formula (6)
It can be approximated by

The following figure KI110 is a diagram showing the principle of bending the steel plate 36, 67 is a reference generatrix, a, b, and c indicate points on this reference generatrix 37, and IC68 is a filament heating line. , Said mother! 137 and the filament heating line 68 intersect at six points. 39.40 are points a on the reference generatrix, respectively.
A line standing perpendicular to the surface of the steel plate 36 in CK, d
The points are the above points a and b.

The center point of the arc passing through C, therefore the steel plate 3 at the three points above
The angle formed by the normal line 41 of 60 and the line 69 connecting point 3 and point d indicates the twist angle φ, and Ladc=θ' indicates the bending angle of the reference generatrix.

Then, the relationship between the bending angle θ perpendicular to the filament heating @58 is θ′ temple θsiQα... Curb... Curb formation (
7) From the above relationship, in order to obtain the bending amount δ by heating a plurality of filaments.

■=θsinα1+θsinα2+θsinα3+・River=θk sin (E 1−=−==−=, −Equation (8)
However, this is the standard for filamentous heating! If the angle α is constant, the above formula (8) becomes ■=nθsinα
...Equation (9) is obtained. However, n is the number of filament heating wires.

If the filament heating is performed at equal intervals, the shape of the curve of the reference line can be approximated to a circular arc, but if the shape is not a circular arc, use the filament heating device at vB in places where the bend is sharp, and use filament heating in places where the curve is gentle. It is sufficient to arrange the ingredients sparsely and apply linear heating.

The processing method that satisfies bending and twisting is Equation (2) 1 Equation (8)
From equation (6), let the torsion angle be @, which is the center angle of Φ1 bending.

＠Φθ±5indi Ｈ...kawa・ Formula (8) % Formula % is obtained, but based on this formula, a large number of 10 to 20 or more filament heating devices are operated at the same time in different directions. Although it is not impossible, it would make the device very complicated and impractical (so the Φ umbrella nθ cos α in equations (3) and (9) ...,
Equation (3) @Φnθsinα=−・・・Equation (9
), extracting the construction conditions n and α.

α=Tan”−L!−・・・・・・・・・・Formula (1
2) is obtained. Using these formulas (11) and (12) to apply bending by moving the thousand-line heating tool at equal intervals in the same direction, uniform twisting and arc-shaped bending can be achieved, but the actual workpiece end When processing a plate, it cannot be said to be uniform, and it is impossible to satisfy twisting and bending at the same time with a shape like the hull outer plate 65. Therefore, it is conceivable that torsion is processed first by giving priority to bending t, and then correction is performed, but since twisting involves bending, it is better to give priority to twisting first and correct the bending in the second step. good.

The straightness of the bend in the second step is in the direction perpendicular to the reference line (α = 9
0°), the bending process in the second step will not in principle cause any twisting.

Fig. 11 shows an example of a plan in which twisting is first applied by the above method.The vertical axis shows the amount of twist Φ, the horizontal axis shows the length L of the reference line of the steel plate, and the vertical axis Φ of 42 is shown. Line 43, which is a dividing line divided by θcosα, and indicates the torsion of the steel plate relative to the standard @
The intersection point with the horizontal axis on the line drawn from the intersection with the horizontal axis is A99B, NO..., and IIK point A9, C...
・If the y midpoint positions A, B, C...correspond to the position tVc of the filament heating tool, the heating tool will be dense where the twist is tight and sparse where the twist is loose. .

The number n of filament heating is not necessarily an integer, and the number n of filament heating is not necessarily an integer.
In 1), the working conditions may be changed, and the bending angle θ of one heating wire may be changed, or the length of a fraction of the heating wire may be changed, but it is more rational to change the bending angle θ. It is. This angle θ can be changed by changing the thickness of the processed steel plate, the shape of the cross section perpendicular to y to the reference line by secondary processing, heating conditions, heating amount, heating rate, etc., but it can be easily determined experimentally. This is the quantity to be found.

A case in which the amount of bending of a steel plate to be processed is corrected using the apparatus of the present invention will be explained as follows.

In Figure 12, the vertical axis is the bending amount δ, the horizontal axis is the reference line length L, and the target bending shape is a curve of 44°.Due to the twisting process in the first step, the shape of 5111 is -6145 Then, the correction value -1146 indicating the amount of bending correction is the difference between the two curves 44.45.

The next K1113 diagram shows the number of filament heating tools 9 for the amount of bending correction.
This is a diagram showing a method for determining the distance between positions 1 and 47, a curve showing the bending correction value δ' (displacement from the reference line) obtained by measurement, and a broken line shown by a dotted line in 48, due to linear heating. The shape of the corrected weight is U.

Each point (2), W, etc. indicates a -line heating position. Therefore, from this, the following formula holds true.

ζ0UV=(UVW=4'VWx =・・・・・・・・・・・・=π−θ Figure 14 shows the correction value δ' shown in Figure 13 as the standard tightening length L.
49 shows a differential curve in which the correction value δ' is changed to the bending angle, and a group of lines 50 parallel to the coordinate axis LK shows lines divided by the bending angle 1θ due to filament heating.

Intersections of the line 49 and the line group 50 A'1 B', C'...
. . . indicates an interruption of the filament heating wire, and in practice, the filament heating may be performed at points on the L axis such as A'1 B', C', and so on.

Said I! The ones shown in Figures 13 and 14 are drawings.

There is no superiority or inferiority in terms of graphic display operations, but rather a method of mathematically processing the same procedure.

Next, regarding the control block for controlling the filament heating device according to the present invention, a#4 is shown in FIG. 15.

Person is the bending shape meter I & 11 circuit block, B is the wire heating condition automatic setting circuit block, C is the wire heating device position setting circuit block, D&! This is a filament heating construction circuit block, and these blocks are B, C, and Di (to explain in more detail, 51 is the main body of the filament heating device.

52 is a rail on which the main body 510 runs and serves as a reference for the seated image axis c[The intersecting coordinate axes yn serve as the reference. Reference numeral 54 denotes a holding bar that holds the filament heating device 55 guided along the cross rails 56&c, and therefore the coordinates of the IC for each filament heating device are held on the holding bar 54 of the filament heating device 55.
Let Yt, Yz...yi. 56 is a filament heating operation panel, and 57a is a manual operation panel.

57b shows the NC tape input, and 57c shows the input of the filament heating and bending shape by online human power. 58 is the main body 51
59 indicates a part of the memory, which contains data on the construction conditions for wire heating.

For example, it is a part that stores the relationship between construction conditions and folding angle θ, and also stores a program for calculating construction conditions for the device. First, regarding the control of the direction and speed of filament heating, 58a indicates a function for processing the Y-axis and Y-axis drive conditions of the device by a computer, and 60x and 60y are speed signals in the direction of the X and Y coordinate axes, respectively. , if V is the composite line heating rate and α is the direction of the filament heating line, then ysinαe
The output corresponds to Y, cO8α. 61x and 613
' is a drive motor 62X in the X-axis direction and a drive motor 62y in the Y-axis direction corresponding to the speed signals 60x and 6'Oy, respectively.
This is a drive unit that drives the

Next, regarding the control of the position of the filament heating device, that is, the automatic setting of the position and interval of the filament heating device, 58b is the filament heating device 5.
It has a function to indicate the coordinates of the position of each filament heating tool 55 with respect to the holding bar 54 of No. be done. 63a, 63b
...63j is the position coordinate Y1 of each wire heating tool. Y2
・・・・・・yj k Part to be memorized.

64m, 64b...64j is an electric motor 6 that automatically positions each filament heating tool 55 by the above-mentioned output.
5a, 65b, . . . 65j, and is automatically set.

66 to 69 indicate a method for measuring the bent shape of a steel plate, 66 is a measuring machine operation panel, 69 is a bent steel plate to be measured, and the measurement coordinate axis is the bending shape. The longitudinal direction overflowing the reference line is the Y axis, the width direction is the Y axis, and the height direction is the two axes.

457Xt67Y and 672 are husband AXII! ljY axis,
68x.

68y and 68z are X-axis, Y-axis, and Z-axis coordinate detection devices, respectively, and the drive unit 67x.

67y and 67z, and position detectors such as potentiometers and encoders are used.

The position signals obtained by the detection devices 68x, 68y, and 68z are fed back to the calculation section of the computer 58 as numerical signals, and the display device 70 is configured to display the shape in a graph. Also, this display device 70 not only displays measured values (1 bend,
Torsion processing conditions.

Since the predicted shape value t of the calculation result of the computer 58 can also be displayed, by using this, it is also possible to modify the construction conditions and simulate the construction conditions using the computer.

As described above, the apparatus according to the present invention has several filament heating devices attached to a movable carriage on rails provided on both sides of a steel plate to be processed, and these filament heating devices are placed at a fixed position relative to each other. By applying the aforementioned prototype of twisting and bending of steel plates to this, the workpiece steel plate can be twisted and bent with extreme precision. Processing can be performed automatically, and by processing information on twisting and bending of the steel plate to be processed, the number and position of heating wires that were conventionally determined by craftsmen based on intuition, experience, and K. The direction of construction can be determined accurately, easily, and automatically.Furthermore, the twisting and bending of the steel plate to be processed can be easily measured using the measuring tool provided in the device of the present invention, and when necessary, has certain characteristics such as being able to correct its twists and bends.

[Brief explanation of the drawing]

Figures 1 to 6 are explanatory diagrams showing the conventional twisting and bending method and principle, Figure 7 is a simplified explanatory diagram of the device of the present invention, and Figures 8 to 14 are diagrams showing the original model for operating this device. Explanatory diagram,
FIG. 15 is a control block diagram. 1.11.36 is a steel plate, 2.15 is a heating tool. 3 is the cooling water supply pipe, 5, 13.37 is the reference line. 6.14.38 is a filament heating wire, 8 is a neutral shaft, 16 is a rail, 18 is a carriage, 20 is a frame, 22
25.28 is a cross saddle, 26 is a holding bar, and 31 is a control panel. 66 is a display device, 64 is a frame line, 65 is an outer plate, 41 is a normal line, 44 is a palm bending curve, 45 is a correction value curve, and 49 is a differential curve. Patent applicant: Koike Sanso Kogyo Co., Ltd. Figure 2 1 Figure 3 4 Figure 5 (Figure 7 Figure 11 Figure 13/1 Figure 14 Procedural amendment (voluntary) Patent dated April 12, 1982 Agency Commissioner Shima 1) Indication of the case by Haruki Patent Application No. 1983-200050 2 Name of the invention Silver strip heating device 6, ・1 Relationship with the case of the person who made the claim Name of the patent applicant Title Koike Oxygen Industry Co., Ltd. 4. Name of agent (6678) Contents of Patent Attorney Dochuyokichikukichi 2 amendment (1) Page 3, line 13, “Can travel in the longitudinal direction”
The statement "can run in the width direction as well as the longitudinal direction" is corrected. (2) Page 6, line 5 says “1 set or 2 lines” VF6
``Pairs to 2 groups''. (3; “Steel plate 15JYr Steel plate 1” on page 11, line 12
1”. (4) r Ladc=a' J Y" on page 17, line 4
Zadc =06''. t57 Page 22, line 13 r (OUV-=-(
UVW=<VWXJYr 10UV=ΔBaW Town αWXJ
and correct it. (6) On page 28, line 11, the phrase "sensation and experience" is corrected to "intuition and experience."

Claims (1)

[Claims] (11) In an apparatus capable of forming a curved surface having complicated bends and torsions by applying linear heating to a steel plate used for a hull outer plate, etc., in the longitudinal direction of the steel plate, A cross carriage that overflows the frame and slides automatically by an electric motor or the like is installed on a frame-like carriage that can move in the width direction with respect to the reference axis direction. By installing a plurality of wire heating devices that can be changed freely, and by combining the running of the carriage and the movement of the cross carriage that moves wet with the carriage, a plurality of wires can be installed in any direction and at any interval. A filament heating device that can simultaneously and automatically perform filament heating. Determine the torsion angle Φ from the main angle O1 and the shape of the bend of the machine to be processed. Find the amount of bend δ and the reference line length L of the steel plate. θ (or 5ine) 8 δ From the formula α=Tan-' τi, use the linear heating tool The number n and the angle α formed between the reference line of the steel plate and the filament heating line were determined, and from this it was possible to automatically determine the positional spacing of the filament heating tool, the filament heating direction, etc. A filament heating device using a plurality of filament heating tools. (3; In the filament heating device according to claim 1, information on one bending and twisting process is given and the height of the steel plate to be processed is detected, thereby determining the amount of torsion. and the amount of bending, and display this in a graph by projecting the reference line of the workpiece steel plate and the torsional angle 9 orthogonal to this onto the plaque/pipe based on mathematically calculated values, and i A wire heating device with a built-in computer that allows you to arbitrarily select the position of the wire heating tools, their mutual spacing, and two working conditions in the wire heating direction.