JPH1190538A - Device for automatic plate bending by high-frequency induction heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically bend a steel plate into a target shape with a shape of complicated curved surface such as hull outer plate. SOLUTION: Many universal poles 20 are provided which support the steel plate 2, a member to be heated, from the lower side, and at the same time have the height of end chip parts structured adjustable to respective position. Above the steel plate 2 placed on these universal poles 20, high-frequency heating coils of high-frequency heating heads are made to automatically travel along prescribed heating lines with a fixed distance kept to the surface of the steel plate 2; thereby the steel plate 2 is heated and automatically bent into a desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a high-frequency induction heating.
Automatic bending equipment, especially for complex curved surfaces such as hull shells
It is useful when applied to bending of a steel sheet having [0002] 2. Description of the Related Art Hull hulls have an underwater
In order to navigate efficiently, complex non-developable curved surface
And a steel plate having a thickness of about 10 to 30 mm. This
In order to process curved outer skin, it is generally called linear heating.
Processing methods have been known for a long time. This is a gas burner
Locally heated the surface of the steel plate by using a method such as
Out-of-plane angular deformation and in-plane shrinkage deformation of steel sheet due to plastic strain
Skillfully utilize and combine to achieve the desired shape
It is a way to get it and is used in many shipyards. [0003] Fig. 15 shows the bending of a steel plate as an outer plate of a hull.
FIG. 16 is an explanatory view conceptually showing a conventional technique according to a construction method, and FIG.
Shows the wood pattern used for the bending process installed on a steel plate
It is a front view. As shown in both figures, in the prior art
First, the frame line of the hull shell (the aggregate of the shell
Line along this aggregate at the mounting position;
Same. ) As target shapes (10 in the figure)
The wooden mold 1 is set on the steel plate 2. Next, each die 1 and steel plate 2
The operator compares the shapes of the two by visual observation and
Considering the gap between the wooden mold 1 and the steel plate 2, for example,
Consider if the position is heated, it will approach the target shape
Each heating position (heating point) is determined. Specifically, the vertical plane
(Same plane as FIG. 16)
Roll along the shaft, and make sure that the contact point
Considering the gap between the die 1 and the steel plate 2 in each state
Decided with due consideration. [0004] After that, how to connect each heating point,
Heating in consideration of whether
The heating line 3 was determined as shown in FIG.
Mark the surface of the steel plate 2 with chalk or the like,
Heated along with gas burner. [0005] SUMMARY OF THE INVENTION As described above, the prior art
The heating decided by the intuition based on the long experience of the worker
The operator can heat the steel plate 2 along the wire 3 with a gas burner.
Thus, a predetermined curved surface is obtained. At this time, the heating wire 3
Approximately 5 years of experience to be able to make decisions reasonably
Is needed. For this reason, the aging of skilled technicians and
This has led to a shortage problem. In addition, the bending process
In the work, the production, installation and setting of the wooden form 1 for the steel plate 2
Much time is required for incidental work such as
Not only long working time but also heating by gas burner
The operation itself is combined with the generation of steam accompanying the evaporation of cooling water
It is heavy work in harsh environment of high temperature and humidity. This
Of a device that realizes automation of the plate bending work
Is long-awaited. SUMMARY OF THE INVENTION In view of the above prior art, the present invention provides a hull shell plate.
Automatically make steel plates with complicated curved shapes such as
Automatic plate bending equipment with high frequency induction heating that can be bent
The purpose is to provide. [0007] [MEANS FOR SOLVING THE PROBLEMS]
The configuration of Ming is characterized by the following points. 1) Straddling between two parallel rails
A vertical traveling trolley running along the rails of this
Lateral running on a traveling trolley in a direction perpendicular to the direction of the rail
It is configured to travel freely in a horizontal plane with a row carriage
Mounted traveling system and mounted on a trolley that can move vertically
And face each other with a certain gap
And heat the surfaces of the opposing heated members by induction heating.
The frequency heating coil and the member to be heated are supported from below and mounted.
Perpendicular to a number of locations specified between the rails
And the height of its own tip can be adjusted.
The universal pole and the specified heating wire data
Control the traveling of the traveling system in the horizontal plane based on the
The high-frequency heating coil is heated along the predetermined heating wire
A control unit for controlling the member to be heated; 2) Straddling between two parallel rails
A vertical traveling trolley running along the rails of this
Lateral running on a traveling trolley in a direction perpendicular to the direction of the rail
It is configured to travel freely in a horizontal plane with a row carriage
Mounted traveling system and mounted on a trolley that can move vertically
And face each other with a certain gap
And heat the surfaces of the opposing heated members by induction heating.
Measures the shape of the surface of the member to be heated and the frequency heating coil
The shape measuring unit attached to the traversing cart
Place the heating member between the rails so that
Its own tip, vertically arranged at a number of identified locations
Universal with adjustable height position
The horizontal plane of the traveling system based on the pole and the specified heating line data
High-frequency heating coil through the running system
Heats the member to be heated along the predetermined heating line,
The traveling of the traveling system in the horizontal plane based on the predetermined measurement data
Control, and the shape measurement unit
And a control unit for controlling to move along. 3) The high frequency induction described in 1) or 2)
High frequency heating coil in automatic plate bending equipment by heating
The gap between the heating element and the surface of the
Around the surface of the member to be heated.
That it was secured by contact. 4) The high frequency induction heating described in 1) or 2)
In automatic plate bending equipment by heat, high frequency heating coil and
The gap between the surface of the member to be heated is
A magnet is provided around the magnet and acts between this magnet and the member to be heated.
To secure by magnetic force. 5) High frequency induction described in 1) or 2)
High frequency heating coil in automatic plate bending equipment by heating
The gap between the heating element and the surface of the
High pressure gas injection means is provided near the
Inject high-pressure gas from the stage toward the surface of the heated member
That it was secured by the reaction force when it was done. 6) Any one of 1) to 5)
High frequency induction heating
The heating coil heats a member to be heated, the shape of which is similar.
A circle that is almost equal to the diameter of the flame of the gas burner at the time
That it was formed into a shape. 7) Any one of 1) to 6)
Control in automatic plate bending equipment by high frequency induction heating
The shape of this heated member is accompanied by the bending of the heated member.
Each universal pole moves according to the shape change
Control in accordance with this
-Sal pole based on target shape data of heated member
Reach the target tip position of each universal pole determined
Control to stop heating work in case of
thing. [0015] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
It will be described in detail based on FIG. FIG. 1 shows an entire automatic plate bending apparatus according to this embodiment.
FIG. As shown in the figure, two parallel
The running rails 11 and 12 are composed of a large number of pedestals 1 standing on the floor surface.
3 between the running rails 11 and 12
Therefore, along the running rails 11 and 12 (X-axis direction)
The directional carriages 14 and 15 are configured to travel.
You. The trolleys 16 and 17 are equipped with high-frequency heating devices I and II.
The horizontal traveling rail mounted on the vertical traveling carriages 14 and 15
Of the vertical traveling carts 14 and 15 on the wheels 14a and 15a.
It is configured to travel in the direction perpendicular to the moving direction (Y-axis direction).
It is. These vertical traveling vehicles 14, 15 and the traversing vehicle
Riding freely on the horizontal plane (XY plane) at 16, 17
Construct a line system. Power supply belts 18 and 19 have high circumference
Supply electric power, high pressure air, cooling water, etc. to the wave heating devices I and II.
For transporting, moving the traveling carriages 14, 15
It is composed of a flexible member so that it moves following
is there. The universal poles 20 and 21 are provided in this embodiment.
The steel plate 2 which is the member to be heated is supported from below and placed.
A large number of specified between the running rails 11, 12
Standing vertically on the floor at the position, and the position of its own tip
Is configured to be adjustable. That is, each universal
Positions of the poles 20 and 21 in a horizontal plane (XY plane)
(X coordinate and Y coordinate) are determined at predetermined positions in advance.
And each universal pole 20, 21 has this built-in
The height of the tip (Z
(Coordinates) can be adjusted. In the apparatus shown in FIG. 1, two sets of longitudinal running
Equipped with row carts 14, 15 and high-frequency heating devices I, II, etc.
And two work areas, and each work area
It is possible to perform plate bending, but these numbers
Can of course be set arbitrarily. Also, in each work area
Longitudinal traveling vehicles 14, 15 and high-frequency heating device I,
The components such as II are configured in exactly the same way. Therefore,
In the following description, the longitudinal traveling trolley 4 and the high-frequency
The structure relating to the first work area having the heating device I and the like as components.
I will explain the result. FIG. 2 shows a high-frequency heating apparatus I which is a part A in FIG.
It is an expansion perspective view which extracts and expands. It is shown in the figure
1, the trolley 1 traveling on the lateral traveling rail 14a.
6 is equipped with a high-frequency heating device I and a shape measuring unit 22
It is integrated with the trolley 16 and freely in the horizontal plane
It is configured to move to. At this time, the shape measurement unit 2
2 along the guide 23 fixed to the traversing carriage 16
It is formed so that it can move vertically, and its lower end is made of steel.
2 and imitate the surface shape of the steel plate 2
To detect the displacement at the time using a sensor such as a differential transformer.
The actual measurement data of the surface shape of the steel sheet 2 will be provided. High
The high frequency heating device I includes a high frequency heating head 24,
Kisible water cooling cable 25, matching transformer 26, power cable
Cable 27, air cylinder 28, air hose 29, cooling
It has a water hose 30 and the like. The high frequency heating head 24
The heating surface of the high-frequency coil faces the surface of the steel plate 2
At the tip of the piston rod 28a of the air cylinder 28
It is stuck. By driving the air cylinder 28, a high circumference
The wave heating head 24 comes in contact with and separates from the steel plate 2. Also, high lap
The wave heating head 24 includes an air cylinder 28 and a matching transformer.
The traveling rail 31 fixed to the trolley 16 together with 26
It is configured to be able to move vertically along. High frequency heating coil of high frequency heating head 24
Power cable 27, matching transformer 26 and high frequency
Power is supplied via a flexible water-cooled cable 25,
Cooling water is supplied via a cooling water hose 30. Also,
High-pressure air is supplied to the air cylinder 28 through an air hose 29.
Is supplied. Here, the power cable 27 and the cooling water
The power supply belt 18 (FIG. 1)
See). FIG. 3 is a high-frequency heating as viewed from the line AA in FIG.
FIG. 3 is a perspective view showing the head 24 and its vicinity in a manner extracted therefrom.
is there. As shown in FIG.
The air cylinder 28 (see FIG. 2) is interposed via a plate-shaped flange 24a.
This is fixed to the piston rod 28a of
A high-frequency heating coil 24b fixed to the center of 24a;
At the outer periphery of the high-frequency heating coil 24b at the flange 24a.
Along with a large number of steel ball portions 24c. Steel ball
24c is in contact with the surface of the steel plate 2 which is the heating surface and
The high-frequency heating head 2 accompanying the movement of the high-frequency heating device I
4 along the surface of the steel plate 2 and at the same time
The gap between the high-frequency heating coil 24b and the surface of the steel plate 2
It has the function of keeping the interval constant. By the way, high frequency
The amount of heat input to the steel plate 2 in heat is the high-frequency heating coil 2
4b, its frequency, high-frequency heating coil 2
4b and the gap as a parameter
It is determined. Therefore, the desired uniform heating is realized.
It is indispensable to keep the gap constant
You. In FIG. 3, reference numeral 32 denotes a nozzle,
When heating by the heat coil 24b, the cooling water hose 33
Then, cooling water is supplied to the heating portion. FIG. 4 shows the high-frequency heating head 24 shown in FIG.
It is a top view which expands and shows the high frequency heating coil 24b.
As shown in the figure, the high-frequency heating coil 24b is
This is the part that generates magnetic flux for induction heating
In the state, the conductive portion 24d formed by spirally forming a copper plate and the conductive portion 24d are formed.
Entire shape with insulating material 24e filling gaps between electrical parts 24d
Are configured to be circular, and the surrounding area is
A core portion 24f formed of an Ian core and serving as a magnetic path is provided.
is there. The circular shape of the high-frequency heating coil 24b at this time
Is a gas when heating a steel plate 2 which is a similar member to be heated.
Circular shape that is almost equal to the diameter of the flame of Sverna
To achieve the same heating as the gas burner.
Swelling. For example, the diameter of the high-frequency heating coil 24b
Is 52 mm, and the diameter of the core portion 24 f is 84 mm.
Examples can be given. FIG. 5 shows an automatic plate bending apparatus according to this embodiment.
3 is a block diagram showing a control system of FIG. As shown in the figure
In addition, the heating point determination means 41 measures target shape data and steel plate.
Reads data and performs predetermined processing (detailed later)
Thus, a heating point on the steel plate 2 is determined. Where the goal
The shape data is, for example, a design given by CAD42.
Data, given as three-dimensional coordinate data,
The shape measurement data is the tertiary of the steel plate 2 actually measured by the shape meter side 22.
Given as original coordinate data. The heating line determination means 44
Based on the information of the heating point determined by the heating point determining means 41
By performing a predetermined process (described in detail later),
Is determined (see FIG. 17; the same applies hereinafter). Addition
The heating wire 3 determined by the heating wire determining means 44 is a point of three-dimensional coordinates.
The data is sent to the control unit 45 as column data. The control unit 45
The longitudinal traveling trolley 14 and the
And the traveling of the traveling system III composed of
The high-frequency heating coil 24 serving as a heating means for the steel plate 2
The position of b is controlled. Thus, the high-frequency heating coil 24
Induction heating of steel plate 2 while moving b along heating wire 3
To bend the steel plate 2. At this time, the control unit 45 controls the traveling system III.
In addition to control, overall control of the device is performed. Specifically
Is, for example, the control of the current supplied to the high-frequency heating coil 24b.
Control of the air cylinder 28, supply of cooling water
Control and position control of the universal pole 20, etc.
It is. In particular, in controlling the position of the universal pole 20
In addition, excessive bending of the steel plate 2 is also prevented. That is, the control unit
45, first, accompanying the bending of the steel plate 2,
Each universal pole 20 moves following the shape change
To control. Then, following this
Universal pole 20 is used for target shape data of steel plate 2.
Target tip of each universal pole 20 determined based on
When the position is reached, heating by the automatic plate bending device
Stop working. Here, such over-bending prevention control is performed.
First, the universal pole 20 is in contact with the steel plate 2
The condition is that the target shape at a certain position is known.
You. For this reason, the control unit 45
CAD with position in horizontal plane and position of tip
To the design data and shape measurement unit 22 given by
3D coordinate data of the measured steel sheet shape data given by
Each universal pole 20 is a steel plate
Of the target shape of the steel plate 2 at the position where it is in contact with the steel plate 2
Calculate the data and set the target tip of each universal pole 20
And position. The universal pole 20 can follow the user.
The contact force of the reversible pole 20 against the steel plate 2 is a predetermined value.
The position of the tip of the universal pole 20 is
It can be easily realized by controlling. Initial stage of bending by the automatic plate bending apparatus
In the state, the steel plate 2 has all the universal poles 20.
Is not necessarily in contact with the steel plate 2
For the universal pole 20, the bending process is in progress.
When the steel plate 2 contacts the universal pole 20
Thereafter, the following control is performed as described above. By the way, the initial state
In the universal pole 20, the target shape of the steel plate 2 is
Of the tip position according to the curved surface of about 60% of the bending shape
The knot is made and the universal pole 2 is in such a state.
0, cold primary bending by bending roll etc.
Place the machined steel plate 2 by rough positioning
After that, the target shape is about 80% of the target shape
And perform the first bending process using the automatic plate bending apparatus.
U. The display device 43 is provided with various types of the automatic plate bending device.
Visualize the information that accompanies the
It also functions as an external input device for information. FIG. 6 shows one example of the processing performed by the heating point determining means 41.
It is an explanatory view for explaining an example. In FIG. 6, 1 'is an explanation.
2 ′ is a similar virtual steel plate for
You. Here, “virtual” means that
Rather than displaying as electronic data or this
What exists as a figure visualized and represented on the device 43
Say. Also, the processing of this example is conventionally performed by an operator.
In the same manner as described above, the contact with the steel plate 1 'is confirmed while rolling the wooden mold 2'.
This is to determine the heating point. So, this
This is referred to as “contact confirmation method”. As shown in FIG. 6A, the bending in this case is performed.
The steel plate 2 'to be processed is a tune subjected to primary bending
It is assumed that the surface
The plate 2 'has a curved surface shape that changes smoothly when observed microscopically.
Instead of having a plane
It is considered a set. For example, as shown in FIG.
In this way, it is more constant than the M line which is the center line in the plate width direction
And a plane at a certain angle b.
It is bent to have a degree. On the other hand,
The target shape is given as shown in FIG. There
First, the wooden mold 1 'is moved from the initial position shown in FIG.
Rolled along the beam line, as shown in FIG.
Next, the wooden mold 1 'is brought into contact with the steel plate 2'. Steel plate at this time
The contacts on 2 ′ are A and B, and the contacts on 2 ′ are C and D
And Next, the wooden mold 1 'is rolled in the opposite direction, and FIG.
As shown in FIG. 6C, the original initial state (shown in FIG.
State). In this manner, the wooden mold 1 'is returned to the initial state.
A straight line U connecting the contacts A and B and a straight line V connecting the contacts C and D
Is obtained, and the intersection point P and the intersection angle θ are obtained. This
The heating point is determined based on the intersection P of
(3 ° in FIG. 6) is defined as the bending angle at the heating point.
Actually, the intersection point P is extended vertically upward in FIG.
The position is a heating position. This heating position is heated and the angle θ
FIG. 6 (e) shows a case where only bending is performed. It is shown in the figure
As described above, the contact B of the steel plate 2 'is formed by the wooden shape due to the heating at this time.
1 'is in contact with the contact point D, and the shape of the steel plate 2' is the target shape.
(The shape of the wooden mold 1 '). Strictly
For example, there is a gap between the intersection P and the heating position based on this.
(The coordinates about the Z axis which is the vertical position are different.)
However, in the bending process, from the intersection P to the contacts B and D
Since the lengths of the straight lines U and V are sufficiently longer than the angle θ,
Processed assuming that P and the heating position based on this are the same position
However, there is no problem in practice. Next, the contact point C of the wooden mold 1 'is connected to the contact point A.
As the reference position corresponding to the initial position described above.
(The operations shown in FIGS. 6 (b) to 6 (d))
The heating point and the bending angle θ at the heating point.
You. This operation is repeated until the wooden form 1 'is extended to the end of the steel plate 2'.
Rolled to successive heating points and bending angles at the heating points
Degree θ is determined. FIG. 7 shows a heating point determined by the heating point determining means 41.
The display screen of the display device 43 when it is determined is conceptually
FIG. FIG. 5A shows the initial position, and FIG.
When the mold 1 'is moved by one rotation, and (c), the wooden mold 1' is
This is the case of rotating. FIG. 8 shows an object to be processed according to the present embodiment.
It is explanatory drawing which shows notionally the relationship of stripping of the steel plate. same
As shown in the drawing, in the present embodiment, one of the cylindrical surfaces having a radius R is set.
Consider a hypothetical steel plate 2 'whose part is taken out as shown in the figure.
To approximate this cylindrical surface by bending, use a circle
Fold along the center axis of the tube so that the cross section is polygonal
Just do it. That is, the target shape is roughly regarded as a cylindrical surface.
Roller line 4 indicates the direction of the center axis when
6 'is defined. In the case shown in FIG.
The center line M intersects the roller line 46 '
If you are. The roller line 46 'and the M line
This is not always the case. Like the hull
Since it forms part of the outer plate, the roller wire 4
6 'and the M line may coincide. FIG. 9 shows one example of the processing performed by the heating line determining means 44.
It is an explanatory view for explaining an example. Of the heating wire in this case
The determination is made by temporarily determining the heating points determined by the heating point determination means 41.
Imaginary straight line, and draw this straight line on the virtual steel plate 2 '.
The degree of parallelism with the virtual roller line 46 'which was
Groups having parallelism are considered as the same group.
The upper part of the drawing is based on the roller line 46 '.
Groups are divided into side and bottom. In addition,
In FIG. 9, F₁~ F₇Is a virtual frame line,
The suffix added to the code F is the frame in this case.
Line number. In addition, each frame line F₁~ F₇
A number of points that are short and perpendicular to the heating points are heating points. As shown in FIG. 9A, first, a starting point 1 is determined.
From the starting point 1 of the mushroom to each frame line F₁~ F₇Heating on
A virtual straight line (shown by a dotted line in FIG. 9) is drawn toward the point.
Good. Here, the starting point is the one with the lower frame line number, and
In the order from the roller line 46 '. Next, as described above, each frame line is started from the starting point 1.
In F₁~ F₇Virtual straight line drawn toward the upper heating point
Of the roller line 46 'is examined. As a result,
If the parallel or intersection angle is less than the specified angle,
Grouping is performed as a heating point of the loop. FIG. 9 (a)
Is the condition for the parallelism in this case based on the starting point 1.
The satisfying heating point of the same group is the frame line F_Three,
F_FourRepresents that there was. Based on starting point 1
When the grouping is completed, it is shown in FIG.
In the same way, grouping based on origin 2
Do. FIG. 9 (b) belongs to group 1 based on origin 1.
The heating point to be determined is determined, and the heating point based on the starting point 2 is confirmed.
Indicates that work is in progress. At this time,
For the heating points that have been divided into groups,
It is not a target of the grouping. Thus, the roller wire 4
Group the heating points below 6 '
After the grouping is completed, as shown in FIG.
Find a straight line (or curve) from the heating point sequence for each loop.
This is a virtual heating line 3 '. The heating wire 3 '
For a straight line, use the least squares method, etc.
Is obtained by spline interpolation or the like. The automatic sheet bending apparatus according to the present embodiment
The shape of the part that generates magnetic flux for induction heating is the same
The diameter of the flame of the gas burner when heating the steel plate 2
High-frequency heating coil 24 configured in a circular shape to be equal
b, various other than linear heating along the heating wire 3
Can be heated. The high-frequency heating coil 24b according to this embodiment is used.
FIG. 10 shows the shape when the steel sheet 2 is specifically heated.
You. In the same drawing, the movement locus of the high-frequency heating coil 24b is shown.
This is indicated by a two-dot chain line. FIG. 10A shows the case of linear grilling.
You. In the case of this linear baking, the high-frequency heating coil 24b
Can be linearly moved by moving the
Can be performed. FIG. 10B shows the case of spot burning. this
In the case of spot burning, the high-frequency heating coil 24b has a spiral shape.
Baking a circle of any radius by moving it to
Can be. FIG. 10C shows the case of weaving baking.
You. In the case of this weaving,
Of the desired width by moving the
Corrugated shapes can be baked. Fig. 10 (d) is pine needle grilled
Is the case. In the case of this Matsuba grill,
It is possible to move while continuously changing the swing width of the file 24b.
Thus, an arbitrary triangular shape can be burned. Induction heating using high frequency heating coil 24b
In this case, the high-frequency heating coil 24b and the member to be heated
It is important to maintain a constant gap between the steel plate 2
Is as described above. Thus high frequency heating
The gap between the coil 24b and the steel plate 2 is kept constant.
For this reason, in the above embodiment, the high frequency heating head 24 has a steel ball portion.
Although 24c is provided, as means for holding such a gap,
It is not limited to this. Reaction force due to magnetic force and high pressure gas
It is possible to maintain a certain gap by using
it can. FIG. 11 shows a state during installation of the high-frequency heating coil 24b.
It is explanatory drawing which shows the 1st modification of a gap retention structure notionally.
You. As shown in the figure, the installation gap holding structure according to the present example
Is the outer periphery of the high-frequency heating coil 24b so as to surround it.
The magnet 51 is disposed in the section. The magnet 51 is the collar 2
4a. On the other hand, the steel plate 2 which is the member to be heated is
The surface facing the magnet 51 has the same polarity as the magnet 51
Is magnetized. Thus, the high-frequency heating coil 24b
Floating due to magnetic repulsion acting between the magnet of steel plate 2
The gap between the steel plate 2 is kept constant. FIG. 12 shows a state during installation of the high-frequency heating coil 24b.
It is explanatory drawing which shows notionally the 2nd modification of a gap holding structure.
You. As shown in the figure, the installation gap holding structure according to the present example
Is different from that of the first modification shown in FIG.
The difference is that a magnetic force source 52 is provided below. This magnetic source 5
2 magnetizes the steel plate 2 so that the magnet 51 of the steel plate 2
Magnetization so that the opposing surfaces have the same polarity as this magnet 51
I do. Thus, the high-frequency heating coil 24b has the first deformation
As in the example, the magnetic repulsive force acting between the steel plate 2 and the magnet
To keep the gap between the steel plate 2 and the steel plate 2 constant. Ma
In addition, the portion of the steel plate 2 facing the magnet 51 always has good magnetic properties.
As shown in FIG.
b so that it is positioned below the magnet 51 with the movement of b.
It is configured to move in synchronization with the movement of the heat coil 24b.
It is. FIG. 13 shows a state during installation of the high-frequency heating coil 24b.
It is explanatory drawing which shows notionally the 3rd modification of a gap holding structure.
You. As shown in the figure, the installation gap holding structure according to the present example
Is a plurality of nozzles 53 around the high-frequency heating coil 24b.
While the nozzle 53 faces the surface of the steel plate 2.
And injects high-pressure air 56 vertically downward.
High frequency heating coil by the reaction force of the injected high pressure air 56
The high-frequency heating coil 24b and the steel plate 2
Is designed to keep the gap between
You. Here, the nozzle 53 is fixed to the flange 24a. FIG. 14 shows a state during installation of the high-frequency heating coil 24b.
It is explanatory drawing which shows notionally the 4th modification of a space | gap holding structure.
You. As shown in the figure, the installation gap holding structure according to the present example
Is obtained by covering the high-frequency heating coil 24b with the cover 54.
It is. The cover 54 has an opening that opens downward.
And the upper part is fixed to the flange 24a.
You. The cover 54 penetrates a part of the upper surface and
Cover via pipe 55 attached to cover 54
While supplying high pressure air 56 into the interior of the
In the cover 54 toward the surface of the steel plate 2 facing the
High-pressure air 56 is injected, and the injected high-pressure air 56
The high-frequency heating coil 24b is lifted by the reaction force
Keep the gap between the heating coil 24b and the steel plate 2 constant
You. In the above-described modified examples, the first and second modified examples
In the example, the magnet 51 may be either a permanent magnet or an electromagnet.
However, the magnetic force can be arbitrarily changed by the current.
Considering the controllability, the electromagnet is preferred. Also,
In the first to fourth modified examples, although not shown, a high frequency
The position of the heating coil 24b is measured by a sensor,
Based on the position information at this time, the high-frequency heating coil 24b
By detecting the position with respect to the steel plate 2, the gap between them becomes constant
Control. This control is performed in the case of the first modification.
Represents the magnetic force of the magnet 51 or the steel plate 2 in the second modification.
In this case, the magnetic force of the magnet 51 or the magnetic
Feedback control based on information
More realizable. Further, a third modified example and a fourth modified example
In the case of, the injection amount or injection pressure of the high-pressure air
Perform feedback control based on location information
This can be achieved by: [0045] The present invention has been described in detail with the embodiments.
As described above, according to the invention described in [Claim 1],
Without the use of
Since plate bending can be performed dynamically,
Workability can be dramatically improved. Also work
There is no need for skill. [Claim 2]
According to the invention, the shape measurement of the heated member is also performed by the automatic plate bending.
This can be done automatically using the running system of the lifting device.
According to the invention described in [claim 3] to [claim 5].
For example, when a steel ball contacts a member to be heated,
High due to the application or reaction of the high-pressure gas
The gap between the frequency heating coil and the member to be heated is kept constant
can do. According to the sixth aspect of the present invention,
For example, one type of high-frequency heating coil can heat various shapes.
I can. According to the seventh aspect of the present invention,
This can prevent the member to be heated from being excessively bent.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an entire automatic plate bending apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view showing a high-frequency heating device as a part A in FIG. 1 in an extracted and enlarged manner. FIG. 3 is a high-frequency heating head 24 as viewed from the line AA in FIG. 2;
And FIG. FIG. 4 is an enlarged plan view showing a high-frequency heating coil 24b of the high-frequency heating head 24 shown in FIG. 3; FIG. 5 is a block diagram showing a control system of the automatic plate bending apparatus according to the embodiment. FIG. 6 is an explanatory diagram for explaining an example of a process performed by a heating point determining unit 41 in FIG. 5; FIG. 7 is an explanatory view showing a display example of a display device 43 in accordance with a process performed by a heating point determining unit 41 in FIG. 5; FIG. 8 is an explanatory view conceptually showing the relationship of stripping a steel plate 2 to be processed according to the present embodiment. FIG. 9 is an explanatory diagram for describing an example of a process performed by a heating line determining unit 44 in FIG. 5; FIG. 10 is an explanatory view conceptually showing an example of a heating shape using the high-frequency heating coil 24b of the automatic plate bending apparatus according to the embodiment. FIG. 11 is an explanatory view conceptually showing a first modified example of the installation gap holding structure of the high-frequency heating coil 24b. FIG. 12 is an explanatory view conceptually showing a second modification of the installation gap holding structure of the high-frequency heating coil 24b. FIG. 13 is an explanatory view conceptually showing a third modification of the installation gap holding structure for the high-frequency heating coil 24b. FIG. 14 is an explanatory view conceptually showing a fourth modification of the installation gap holding structure of the high-frequency heating coil 24b. FIG. 15 is an explanatory view conceptually showing a conventional technique relating to a bending method of a steel plate serving as an outer plate of a hull. FIG. 16 is a front view showing a state in which a wooden pattern used for bending a steel sheet according to the related art is installed on the steel sheet. FIG. 17 is a perspective view showing a state where a heating wire is applied to a steel sheet and determined in the related art. [Description of Signs] I, II High-frequency heating device III Traveling system 11, 12 Traveling rail 14, 15 Vertical traveling carriage 16, 17 Traversing carriage 20, 21 Universal pole 22 Shape meter side 24 High-frequency heating head 24a Flange 24b High frequency Heating coil 24c Steel ball section 41 Heating point determining means 44 Heating line determining means 45 Control section

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Kazuaki Ota             No. 1-1 Akunouracho, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries             In Nagasaki Shipyard Co., Ltd. (72) Inventor Fukumi Hamaya             No. 1-1 Akunouracho, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries             In Nagasaki Shipyard Co., Ltd.

Claims (1)

Claims: 1. A longitudinal traveling trolley straddling between two parallel rails and traveling along the rails, and on the longitudinal traveling trolley in a direction perpendicular to the direction of the rails. A traveling system configured to travel freely in a horizontal plane with a traveling traversing vehicle, and opposed to the traversing vehicle movably in the vertical direction, with a fixed gap on the surface of the member to be heated And a high-frequency heating coil for induction heating the surfaces of the opposed heated members, and vertically arranged at a number of positions specified between the rails so as to support and place the heated member from below. A universal pole configured such that the height position of its own tip can be adjusted, and the traveling of the traveling system in a horizontal plane is controlled based on predetermined heating line data. Heated along the heating line Automatic plate bending apparatus by high frequency induction heating, characterized in that a control unit for controlling to heat the wood. 2. A vertical traveling vehicle that runs across and runs along two parallel rails, and a transverse vehicle that travels on the vertical traveling vehicle in a direction perpendicular to the direction of the rails. And a traveling system configured to travel freely in a horizontal plane, and attached to a traversing trolley movably in the vertical direction, and opposed to each other with a certain gap on the surface of the member to be heated. A high-frequency heating coil for induction heating the surface of the member to be heated; a shape measuring unit attached to the traversing carriage so as to measure the shape of the surface of the member to be heated; A universal pole vertically arranged at a number of positions specified between the rails and configured such that the height position of its own tip can be adjusted, in the horizontal plane of the traveling system based on predetermined heating line data Control the running of The high-frequency heating coil heats the member to be heated along the predetermined heating line via the traveling system, and controls the traveling of the traveling system in the horizontal plane based on the predetermined measurement data. And a control unit for controlling movement along a predetermined measurement path. 3. The automatic plate bending apparatus using high-frequency induction heating according to claim 1 or 2, wherein the gap between the high-frequency heating coil and the surface of the member to be heated is:
An automatic plate bending apparatus using high-frequency induction heating, wherein a steel ball is provided around a high-frequency heating coil, and the steel ball is secured by contacting the surface of the member to be heated. 4. The automatic plate bending apparatus using high-frequency induction heating according to claim 1 or 2, wherein the gap between the high-frequency heating coil and the surface of the member to be heated is:
An automatic plate bending apparatus using high-frequency induction heating, wherein a magnet is provided around a high-frequency heating coil and secured by a magnetic force acting between the magnet and a member to be heated. 5. The automatic plate bending apparatus using high-frequency induction heating according to claim 1 or 2, wherein the gap between the high-frequency heating coil and the surface of the member to be heated is:
High-frequency gas injection means is provided near the high-frequency heating coil, and high-pressure gas injected by the high-pressure gas injection means is secured by a reaction force when the high-pressure gas is injected toward the surface of the member to be heated. Automatic plate bending equipment by induction heating. 6. An automatic plate bending apparatus according to any one of [1] to [5], wherein the high-frequency heating coil has the same shape and heats a member to be heated. An automatic plate bending apparatus using high-frequency induction heating, wherein the automatic plate bending apparatus has a circular shape substantially equal to the diameter of the flame of the gas burner at the time. 7. The automatic sheet bending apparatus according to any one of claims 1 to 6, wherein the control unit controls the heating of the member to be heated in accordance with the bending of the member to be heated. While controlling each universal pole to move according to the change in shape, any one of the universal poles is moved to the target tip position of each universal pole determined based on the target shape data of the member to be heated. An automatic plate bending device using high-frequency induction heating, characterized in that the heating operation is controlled to be stopped when the temperature reaches the limit.