WO2012141405A1 - Three-dimensional curved surface processing apparatus for thick plate using high frequency induction heating by controlling automatic precise positioning of coil - Google Patents

Abstract

Disclosed is a three-dimensional curved surface processing apparatus for a thick plate using high frequency induction heating by controlling the automatic precise positioning of a coil comprising: a power supply means; a frame for supporting a plurality of parts; a heating means for carrying out high frequency induction heating for a thick plate which is secured on a work table; a conveying means for guiding the movement of the heating means or the work table; a heat exchanger for cooling one side of the heating means by cooling water which passes through the heat exchanger; a displacement measuring means for measuring height displacements of the thick plate before and after the heating; and a control means for controlling the operations of the heating means, the conveying means, the heat exchanger and the displacement measuring means. According to the configuration, curved surface processing time and power consumption are noticeably reduced, and the apparatus is environmentally friendly as gas is not used as a heat source unlike in a conventional gas torch type linear heating method. Furthermore, precision in the curved surface processing may be increased by providing the displacement measuring means.

Description

Thick plate three-dimensional bending machine using high frequency induction heating by automatic coil position precise control

The present invention uses high-frequency induction heating by automatic coil position automatic precision control, and has a displacement measuring means to measure height displacement before and after heating of a thick plate to enable more precise curved processing. A three-dimensional curved processing apparatus for a thick plate using high frequency induction heating.

The shipyards design the alignment to have the optimum driving performance by considering the cargo load, speed and fuel consumption rate to meet the purpose of the ship and the requirements of the owner.

Thus, the outer shell of the hull is composed of many three-dimensional curved surfaces. The hull shell, defined by the linear design, is divided into about 100-300 shells through a landing process.

Many of these shells are made of thick plates to increase the durability of the vessel, and more than 70% of the outer shell is made of curved surfaces.

Conventionally, the thick plate is processed by using a variety of processing equipment such as rollers and presses.

Korean Patent Laid-Open Publication No. 10-2009-0093657 discloses a "hulling shell forming apparatus using a method for calculating the multi-point press position information for forming the hull shell," and a schematic state diagram of use is shown in FIG.

However, there is a problem in forming the outer plate 10 of the hull using the multi-point press 20.

That is, when the surface processing is performed by using the press 20, a large amount of deformation occurs initially, and since there are many process variables such as the molding position and the molding depth, the precision of the curvature greatly depends on the skill of the operator. There is a problem.

In addition, since each outer plate rarely has the same shape and dimensions, and is a thick plate in the range of 10 to 40 mm thick, which is difficult to form into a desired shape at one time, the same shape is used only by a cold forming process such as a multi-point press. Since it is difficult to complete a hull curved surface processing, the hot working method using linear heating for processing the outer shell of a hull to a curved surface is repeatedly applied for final precision molding.

The prior art of the hot working process using the linear heating is to generate plastic deformation in the thick plate through the tension and compression of the plate while undergoing the process of intensive heating and cooling a certain area corresponding to the surface of the plate using a gas torch By using the principle, it is used as shown in FIG.

That is, a plurality of gas torch 40 is provided on the rear plate 30 for the curved processing, and the plurality of gas torches 40 are disposed to be spaced apart in a straight line to radiate the flame downward.

However, the hot working method has a problem that the material is deformed in an undesired direction if the temperature of the thick plate 30 is not precisely controlled by applying a high heat locally to the thick plate 30, and the heating direction, speed, heat input amount, cooling Since there are many factors affecting the work such as the method and the thickness of the plate, it is difficult to control the required curvature of the thick plate.

In addition, although efforts for automation are ongoing, the heating rate is relatively low, so it has not been put to practical use, and there are many environmentally-friendly factors such as emitting a large amount of CO ₂ gas and generating loud noise. And it is difficult to control the heat deformation amount.

Therefore, an object of the present invention for solving the above problems is to provide a three-dimensional displacement measuring means in performing a linear heating process using high-frequency induction heating by automatic coil position automatic precision control desired heating wire before heating the thick plate Preliminary measurement of the virtual three-dimensional heating wire in the direction, and the measurement of the height direction displacement after the linear heating to enable more precise bending, three-dimensional bending of the thick plate using high frequency induction heating by automatic three-dimensional coil position control. It is in providing a device.

Another object of the present invention is to optimize the shape and arrangement of the heating coil to enable rapid heating, and to provide automatic control of the coil position to improve workability and productivity by providing a conveying means to enable three-dimensional movement of the heating coil. It is to provide a three-dimensional curved processing apparatus for a thick plate using high frequency induction heating.

The three-dimensional curved processing apparatus of a thick plate using high frequency induction heating by automatic coil position automatic precision control according to the present invention is characterized by performing high frequency induction heating on a power plate, a frame supporting a plurality of parts, and a thick plate seated on a work table. A heating means, a conveying means for guiding the movement of the heating means or a work table, a heat exchanger cooling through one side of the heating means, displacement measuring means for measuring height displacement before and after heating with respect to the thick plate, and the heating And means for controlling the operation of the means, the conveying means, the heat exchanger and the displacement measuring means.

The displacement measuring means is arranged to be spaced apart from the heating means, characterized in that for measuring the height data for each position of the thick plate to transmit to the control means.

The displacement measuring means is characterized in that the contact sensor is applied.

The conveying means is characterized in that the heating means is guided to be movable in three dimensions with respect to the thick plate.

The heating means includes a transformer positioned under the heating means for induction heating the thick plate, a control box for controlling the output size of the high frequency current by receiving power from the power supply means, and the control box and the transformer electrically It characterized in that it comprises a connector for connecting.

The transformer is characterized in that it comprises a coil for generating an alternating flux by receiving a high frequency current from the control box, and a core for receiving the coil therein.

The coil is characterized in that it is formed by bending a bar having a rectangular cross section a number of times.

The coil is bent to open in one direction.

The core is characterized in that formed of a plurality of silicon steel sheet.

The heat exchanger is characterized by simultaneously cooling the transformer and the connector.

The transformer, the control box and the connector are integrally coupled and move simultaneously.

The connector is formed by bending a metal plate a plurality of times, characterized in that the flow path is formed on one side via the cooling water provided from the heat exchanger.

The outer side spaced apart from the transformer, characterized in that it is provided with a spacing for limiting the separation distance between the transformer and the rear plate by rolling motion in contact with the rear plate.

The conveying means is characterized in that it comprises a shanghai sending portion for allowing the heating means to linearly reciprocate in the height direction of the frame.

As described in detail above, in a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the coil position automatic precision control according to the present invention, the shape and arrangement of the coil and the core are optimized, and the movement of the coil is automatically controlled. Therefore, it was comprised so that rapid heating of the surface part near a coil may be possible in the heating wire center and thickness direction.

In this case, additional heating of the coil edges due to inadequate coil design does not occur, thereby preventing the deformation of materials such as local melting at the end of the thick plate due to eddy current, thereby improving the overall workability of the sheet.

In addition, the present invention has the advantage that the accuracy is improved because the machining error is reduced by measuring the height information for each position of the thick plate with a displacement measuring means and compared by position after the machining.

In addition, it is possible to significantly shorten the process time for grain processing has the advantage that the productivity is improved.

In addition, since it does not use any gas, it can be applied as an eco-friendly method because there is no carbon dioxide emission compared to the existing gas torch type.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a use state diagram of a thick plate bending machine according to the prior art;

2 is a use state diagram of another thick plate bending machine according to the prior art;

Figure 3 is a perspective view showing a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention.

Figure 4 is a front view showing a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention.

5 is a perspective view showing a heating means in a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention.

6 is a partially enlarged view showing a transformer which is a main component of a heating means in a three-dimensional curved processing apparatus for a thick plate using high frequency induction heating according to the present invention;

7 is a front view showing the configuration of a preferred embodiment of a transformer.

8 is a side view showing the configuration of a preferred embodiment of a transformer.

Fig. 9 is a longitudinal sectional view showing a configuration of a spacing maintenance block as one configuration in a three-dimensional curved processing apparatus for a thick plate using high frequency induction heating according to the present invention.

10 is a state diagram showing the configuration of the displacement measuring means as one configuration in the three-dimensional curved processing apparatus of the thick plate using high frequency induction heating according to the present invention.

11 is a heat transfer analysis result of the thick plate using the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating according to the present invention.

12 is a schematic diagram showing a heat transfer analysis position of a thick plate using a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention.

FIG. 13 is a graph showing a heat transfer analysis result for a heating line direction function at the position of FIG. 12. FIG.

14 is a FEM result of analyzing the stress and the Z direction deformation amount according to the change in the power applied to the three-dimensional curved processing apparatus.

15 is a real picture showing the cross-section of the thick plate manufactured according to a preferred embodiment of the present invention and displacement measurement results by position.

Fig. 16 is a sectional photograph in which only the heating wire portion of the thick plate section is enlarged.

17 is a measurement data of the height before and after heating using a displacement measuring means of one configuration in a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention.

18 is a table showing displacement before and after heating in the table of FIG. 17.

19 is a graph showing the table of FIG. 18;

Hereinafter, with reference to the accompanying Figures 3 and 4 will be described the configuration of the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating according to the present invention.

Prior to this, the terms or words used in this specification and claims should not be construed in the ordinary and dictionary sense, and the inventors may appropriately define the concepts of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be water and variations.

3 is a perspective view showing a three-dimensional processing apparatus of a thick plate using high frequency induction heating according to the present invention, Figure 4 is a three-dimensional processing apparatus of a thick plate using a high frequency induction heating according to the present invention (hereinafter ' Front view showing the " processing device "

As shown in the drawing, the curved apparatus according to the present invention is for processing the thick plate by induction heating to have a curved surface, and to compare and examine the positional displacement before and after heating of the three-dimensionally curved thick plate. Device DLK.

To this end, the grain processing apparatus, the power supply means 100, the frame 200 for supporting a plurality of parts, and the heating means 300 for performing high frequency induction heating on the back plate (P) seated on the work table 210 And, the conveying means 400 for guiding the movement of the heating means 300 or the work table 210, the heat exchanger 500 for cooling via one side of the heating means 300 and the thick plate (P) Displacement measuring means 60 for measuring the height displacement before and after heating, and control means for controlling the operation of the heating means 300, the transfer means 400, the heat exchanger 500 and the displacement measuring means 600. And 700.

The power supply means 100 is a configuration for supplying power to the heating means 300 so that high frequency induction heating can be carried out, in the embodiment of the present invention generates a high frequency of up to 20 Hz, the output of 100 Hz It has a capacity and is configured to be heated up to 1000 ℃.

The frame 200 is located on the left side of the power supply means 100. The frame 200 supports a plurality of parts, and the work table 210 is provided at the front to allow the rear plate P to be seated.

Looking in more detail, the work table 210 is coupled to a plurality of rods to each other to form a space therein so that the heating means 300 can be supported in a suspended state.

The frame 200 is provided with a conveying means 400. The conveying means 400 is configured to guide the heating means 300 to move in three dimensions with respect to the rear plate (P), the heating means 300 is based on the frame 200 in the left / right direction and The linear reciprocating motion in the up / down direction is possible, and the linear reciprocation motion in the forward / rear direction of the work table 210 is enabled.

That is, the transfer means 400 is coupled to the heating means 300 and is mounted on the upper surface of the frame 200 to support the load of the heating means 300, the linear support reciprocating linearly in the left / right direction The left and right conveying unit 420 forcing the movement, the front and rear conveying unit 440 for forcing the forward / backward movement by supporting the lower surface of the work table 210 upward, and the heating means 300 for the support 220 It is configured to include a shanghai conveying unit (reference numeral 460 of Fig. 5) forcing the up / down conveying of).

The left and right transfer unit 420 and the front and rear transfer unit 440 includes a rail, a guide, and a motor forcing a linear reciprocating motion of the guide, and the shanghai transfer unit 460 has a screw and a cam applied thereto.

The heat exchanger 500 is provided at the rear side of the frame 200. The heat exchanger 500 is configured to circulate the cooling water so that the heating means 300 is cooled, and may include a storage tank for storing the cooling water and a pump for forcibly circulating the cooling water stored in the storage tank. have.

Displacement measuring means 600 is provided on the right side of the heating means 300. The displacement measuring means 600 measures the height data for each position of the rear plate (P) before the machining, and transmits and stores this data to the control means 700 by the position-specific height of the thick plate (P) after machining It is a configuration to measure the displacement compared to the data.

To this end, the displacement measuring means 600 is capable of measuring the displacement by directly contacting the rear plate (P), it is configured to be able to calculate the curvature by measuring the position of the plate immediately after processing.

To this end, the displacement measuring means 600 is preferably a contact sensor is applied, it is arranged to move in the same manner as the heating means 300 spaced apart from the heating means 300 by a predetermined distance.

The control means 700 is provided on the right side of the frame 200. The control means 700 is for controlling the operation of the heating means 300, the transfer means 400 and the heat exchanger 500, the heating temperature of the thick plate (P) to be heated by the heating means 300, heating It is configured to control the driving of the transfer means 400 for the transfer of the means 300 or the work table 210, the flow rate of the cooling water circulation of the heat exchanger 500, and the like.

On the other hand, the heating means 300 is provided on the left side of the control means 700. The heating means 300 is a configuration for induction heating the thick plate (P) by receiving power from the power supply means 100, a detailed configuration of the heating means 300 will be described with reference to FIGS. do.

5 is a perspective view showing a heating means 300 in the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating according to the present invention, Figure 6 is a three-dimensional curve of the thick plate using the high frequency induction heating according to the present invention A partially enlarged view showing a transformer which is a main component of the heating means 300 in the processing apparatus is shown.

First, as shown in FIG. 5, the heating means 300 is located below the heating means 300, and a transformer 320 for induction heating the thick plate P and power from the power supply means 100. It comprises a control box 340 for controlling the output size of the high-frequency current, and the connector 360 for the control box 340 and the transformer 320 is electrically connected.

The transformer 320 is the most important configuration among the various configurations of the heating means 300, the coil 324 formed of a ferrite having a shape that is bent in one direction by bending a silicon steel rod having a rectangular cross section a number of times, and the coil And a core 322 that houses 324 therein.

The connector 360 is provided above the transformer 320. The connector 360 is formed by bending a plurality of metal plates, and when viewed from the front, the center part is bent to have an approximately 'c' shape, and the transformer 320 is electrically connected to a lower end part.

In addition, the upper rear end of the connector 360 is electrically connected to the control box 340. Therefore, the connector 360 serves to electrically connect the control box 340 and the transformer 320.

In addition, the connector 360, the control box 340, and the transformer 320 are integrally coupled and movable at the same time. That is, as described above, the supporter 220 is supported on the frame 200 so as to linearly reciprocate, and the load of the control box 340 is supported on the supporter 220.

Therefore, when the control box 340 is moved in accordance with the transport of the support 220, the connector 360 and the transformer 320 is a linear reciprocating movement in the left / right direction relative to the frame 200. .

The flow path 362 is provided on the surface of the connector 360. The flow path 362 is configured to allow the cooling water cooled through heat exchange while passing through the heat exchanger 500 to pass through the connection hole 360. The flow path 362 has an empty tubular shape and is bent several times. It is attached to the outer surface of the connector 360.

Therefore, the coolant flowing along the flow path 362 may absorb and heat the heat of the connector 360.

On the other hand, the heat exchanger 500 also performs the role of cooling the heating means 300 at the same time. That is, the cooling water passing through the heat exchanger 500 is configured to circulate along the cooling pipe 364 installed to pass through the heating means 300.

More specifically, as shown in FIGS. 7 and 8, the cooling pipe 364 is connected to communicate with the inside of the core 322 so that the cooling water may be cooled by heat exchange while passing through the transformer 320.

In addition, the cooling pipe 364 may be branched into a plurality of branches as shown in FIG. 5 to be coupled to communicate with the flow path 362 and the transformer 320.

An outer space holding portion 380 is provided on the outside of the transformer 320. Four space keeping 380 is provided on the outside of the transformer 320 so as to be spaced apart from each other, and serves to limit the separation distance between the rear plate (P) and the transformer (320).

9 is a detailed configuration of the spacing 380. As shown in the drawing, the gap retaining zone 380 is located at the side of the heating unit 300 and fixed to the upright with respect to the ground, and is located below the coupling portion 382 and the rear plate (P) and optional It includes an elastic generating portion 384 for generating an elastic restoring force at the time of contact and a height adjusting portion 388 for height adjustment of the elastic generating portion 384.

The coupling portion 382 is coupled to the height adjustment unit 388 and the lower end, the space is formed in the height adjustment unit 388 to enable the linear movement of the elastic generating unit 384 in the up and down direction ( See the right figure of FIG. 9). Then, the fastener 389 is provided through the right side surface of the height adjustment unit 388.

Accordingly, the outer surface of the elastic generator 384 may be pressed by the rotation of the fastener 389 so that an insertion depth into the height adjusting unit 388 may be fixed.

An elastic member 385 is provided inside the elastic generator 384, and a ball 386 is rotatably constrained under the elastic member 385. Therefore, the ball 386 is located at the lowermost side of the spacing 380 to be in contact with the rear plate (P), and pushes upwards as the contact pressure with the rear plate (P) increases, the elastic member ( 385) is configured to generate elastic restoring force.

Therefore, when the ball 386 is transported by the action of the front and rear conveying unit 440, the movement of the rolling along the upper surface of the back plate (P) to prevent the defect such as being stamped on the back plate (P) in advance. To be able.

Hereinafter, a detailed configuration of the displacement measuring means 600 will be described with reference to FIG. 10.

10 is a state diagram showing the configuration of the displacement measuring means as one configuration in the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating according to the present invention.

The displacement measuring means 600 is configured to be able to adjust it on contact with the various thick plate (P).

That is, the displacement measuring means 600 includes a contact sensor 620 for measuring height data in contact with the rear plate P, and a holder 640 for supporting the contact sensor 620 to maintain a predetermined position. It is configured by.

The holder 640 is coupled to the Shanghai East 460, the upper end is moved in the same speed and direction as the heating means 300, it is configured to enable length adjustment or angle adjustment.

In addition, the contact sensor 620 is provided below the holder 640. The contact sensor 620 measures the position data by contacting the lower surface with the upper surface of the rear plate (P), is electrically connected to the power supply means 100 is supplied with power.

In addition, the contact sensor 620 transmits the measurement data to the control means 700, the control means 700 is capable of measuring the height displacement before / after the processing by storing or comparing this data.

Hereinafter, with reference to the accompanying Figures 11 to 18 will be described the experimental results using the processing apparatus configured as described above.

First, Figure 11 is a heat transfer analysis result of the thick plate using the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating according to the present invention, in the experiment for the present invention, 17mm × 300mm × 500mm A thick plate (P) of SS400 material having a size of was used, and the core 322 has a ferrite magnetic material applied thereto, and is surrounded by a coil '' made of oxygen-free copper.

In addition, the core 322 has a shape in which a plurality of silicon steel sheets are stacked.

The conveying speed of the thick plate (P) is 5mm / s, a power of 40 kHz having a frequency of 15 kHz was applied, the separation distance of the heating means 300 and the thick plate (P), that is, air gap (air gap) ) Was 5 mm.

The air convection coefficient is 0.02 N / sec / mm / ° C.

In addition, a plurality of heating wires are defined on the thick plate P, and positions are assigned at equal intervals for each of the plurality of heating wires.

As a result of the lactic acid element analysis under the conditions described above, as shown in FIG. 11, the heat input amount was distributed intensively in the center region of the thick plate P where the heating line is located, and at least the austenite A3 transformation temperature of the thick plate P (minimum 950 ℃ or more) can be expected to increase the temperature.

And, as a result of predicting the temperature profile of the thick plate (P) at five different points as shown in Figure 13, due to the eddy current maximized by the edge effect at the initial corner of the thick plate (P) corresponding to step 1, Compared with over 100 ℃ overheating occurs.

14 is a FEM result of analyzing the stress and the Z direction deformation according to the change in the power applied to the three-dimensional curved processing apparatus. As the applied power increases, the maximum stress value increases, and accordingly, the thickness direction (Z-axis). It can be seen that the amount of thermomechanical deformation in the furnace is proportional to the applied power.

This is believed to be due to the increase in heat flux applied to the unit surface area.

FIG. 15 is a physical photograph showing a cross section of a thick plate manufactured according to a preferred embodiment of the present invention and displacement measurement results for each position, and the absolute displacement value in the height direction for each position could be measured.

16 is a cross-sectional photograph in which only the heating wire portion of the thick plate section is enlarged, and it can be seen that the size of the heat affected zone is larger as the applied power increases.

FIG. 17 is measurement data obtained by measuring a height before and after heating using a displacement measuring means as one component in a three-dimensional curved processing apparatus of a thick plate using high frequency induction heating according to the present invention, and FIG. It is a table which shows the displacement before and after, and FIG. 19 is a graph which shows the table of FIG.

As shown in these experimental results, when the applied power is applied to 40 kW and the feeding speed of the heating means 300 to the thick plate P is set to 5 mm / s, the flatness before the machining is measured relatively evenly. The same graph appeared.

That is, it can be seen that the position of the height direction (Z-axis) similarly changed for each position as it proceeds in the heating line direction (Y-axis) direction.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

In the three-dimensional curved processing apparatus of the thick plate using the high frequency induction heating by the automatic position control of the coil according to the present invention, the shape and arrangement of the coil and the core are optimized, and the movement of the coil is automatically controlled, In the thickness direction, it was comprised so that rapid heating of the surface part near a coil might be possible.

At this time, additional heating of the coil edges due to inadequate coil design does not occur, and thus it is possible to cut a large area sheet by blocking material deformation such as local melting at the end of the thick plate due to eddy current.

And, by using the displacement measuring means to measure the height information for each position of the thick plate and can be compared for each position after the machining, the machining error is reduced and more precise work is possible.

In addition, since the process time for grain processing can be significantly shortened, productivity is improved, and since no gas is used, there is no carbon dioxide emission compared to the conventional gas torch, and thus it can be applied as an environmentally friendly method.

Claims (14)

Power supply means, A frame supporting multiple parts, Heating means for conducting high frequency induction heating on a rear plate seated on a work table; Transfer means for guiding movement of the heating means or work table; A heat exchanger for cooling via one side of the heating means, Displacement measuring means for measuring height displacement before and after heating with respect to the thick plate; And a control means for controlling the operation of the heating means, the conveying means, the heat exchanger, and the displacement measuring means. 3D curved apparatus of a thick plate using high frequency induction heating by automatic precision control of coil position. According to claim 1, wherein the displacement measuring means, It is disposed apart from the heating means, and the height data for each position of the thick plate is measured and transmitted to the control means, the three-dimensional curved processing apparatus of the thick plate using high frequency induction heating by automatic precise position control of the coil. 3. The three-dimensional curved processing apparatus of a thick plate according to claim 2, wherein the displacement measuring means is a contact sensor applied. The method of claim 2 or 3, wherein the transfer means, The three-dimensional curved processing apparatus for a thick plate using high-frequency induction heating by automatic precise position control of the coil, characterized in that the heating means is guided so as to move in three dimensions with respect to the thick plate. The method of claim 2 or 3, wherein the heating means, A transformer positioned under the heating means to inductionly heat the thick plate; A control box that receives power from the power supply means and controls the output size of the high frequency current; The three-dimensional curved processing apparatus of the thick plate using high-frequency induction heating by the coil position automatic precision control, characterized in that it comprises a connector for electrically connecting the control box and the transformer. The coil of claim 5, wherein the transformer receives a high frequency current from the control box and generates an alternating magnetic flux; And a core for accommodating the coil therein. 3D curved processing apparatus for a thick plate using high frequency induction heating by automatic precise position control of the coil. The apparatus of claim 6, wherein the coil is formed by bending a bar having a rectangular cross section a plurality of times. 7. 8. The apparatus of claim 7, wherein the coil is bent to open in one direction. 9. The apparatus of claim 8, wherein the core is formed of a plurality of silicon steel sheets. 6. The three-dimensional curved processing apparatus for thick plates using high-frequency induction heating by coil position automatic precision control, wherein the heat exchanger cools the transformer and the connector at the same time. The apparatus of claim 5, wherein the transformer, the control box, and the connector are integrally coupled and simultaneously moved. 6. The method of claim 8, wherein the connector is formed by bending a metal plate a number of times, one side is a high-frequency induction heating by the automatic automatic control of the coil position, characterized in that the flow path is formed via the cooling water provided from the heat exchanger 3D curved processing device of the thick plate used. According to claim 3, Outside the spaced apart from the transformer, 3. The apparatus for processing a thick plate of a thick plate using high frequency induction heating by automatic precise position control of a coil, characterized in that a gap holder is provided to contact the thick plate to limit the separation distance between the transformer and the thick plate. 4. The thick plate of claim 3, wherein the conveying means comprises a shanghai conveying portion for allowing the heating means to linearly reciprocate in the height direction of the frame. Dimensional Machining Device.

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