JP2004027275A - Apparatus for removing strain in steel material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for removing strain in a steel material with which heat gain into the steel material with induction current can be controlling at high accuracy by always keeping a gap between a heating coil and the surface of the steel material to a target value without affecting the surface shape of the steel material and the traveling of a truck loading the heating device. <P>SOLUTION: In the apparatus for removing the strain in the steel material, in which the heating device for removing the strain in a deformed part by heating the neighborhood of the deformed part of the steel material with the heating coil set with a gap to the surface of the steel material on the truck, a supporting member for supporting an amplification transfer and the heating coil, and arranged vertically movable by making independent of this truck, in the truck body supporting the wheels of the truck, and a mechanism for adjusting the gap with the heating coil, holding the gap between the heating coil and the surface of the steel material to a prescribed gap through the supporting member, are provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is applied to the removal of distortion generated in a hull weld or the like of a ship, and generates heat due to an induced current in a steel material by a heating coil that is installed with a predetermined gap from the surface of the steel material and is supplied with a high-frequency current. The present invention relates to an apparatus for removing distortion of a steel material in which a heating device is mounted on a traveling carriage and is moved on the surface of the steel material, and the vicinity of a deformed portion of the steel material is heated to remove the distortion.
[0002]
[Prior art]
In a hull of a ship, particularly a hull in which a thin steel material occupies a large portion such as a passenger ship, deformation occurs due to heat input during welding and also the weight of the steel material. As means for removing distortion due to such deformation, a means for correcting the deformation of the steel material by using a gas burner and heating the vicinity of the deformed portion with a high-temperature gas such as argon gas from the gas burner is often used.
[0003]
However, in the means for heating the deformed portion and its vicinity by a high-temperature gas using such a gas burner, the work of removing the strain itself is simple, but the deformed portion such as a weld bead portion and the vicinity thereof are gas-heated. Therefore, it is difficult to adjust the heat input, and since the distortion is removed by adding an artificial factor such as an operator's empirical factor, it is practically necessary to surely remove the distortion so that the steel material has a target shape. Is impossible.
As means for dealing with such a problem, a strain relief device applying high-frequency induction heating has been proposed.
[0004]
FIG. 2 is an external side view showing a schematic configuration of a high-frequency induction heating strain removing device proposed in Japanese Patent Application Laid-Open No. 11-170081.
In the drawing, reference numeral 010 denotes a heating device having a configuration to be described later, which is mounted on a traveling carriage 011 which is made to travel on the steel plate 20 by a motor 017. 015 is a wheel of the traveling carriage 011.
In the heating device 010, reference numeral 012 denotes an amplification transformer for amplifying a current from a power supply (not shown). Numeral 013 denotes a heating coil arranged at a predetermined gap on the surface of the steel plate 20 and is wound around the ferrite core 018 and a high-frequency current amplified by the amplification transformer 012 is supplied.
[0005]
In such a high-frequency induction heating strain removing apparatus, the traveling carriage 011 is caused to travel along the welding bead on the steel plate 20, and a current supplied from a power supply (not shown) is converted into a high-frequency current having a large current value by an amplification transformer 012. When an electric current is applied to the heating coil 013, an induced current (eddy current) is generated in the steel sheet 20 adjacent to the heating coil 013, and the vicinity of the welded portion of the steel sheet 20 is heated by Joule heat caused by the induced current. , To remove the distortion of the portion.
[0006]
[Problems to be solved by the invention]
In a high-frequency induction heating strain removing device provided with a heating device that supplies a high-frequency current to a heating coil disposed at a predetermined gap from the surface of a steel sheet to generate heat by the induced current in the steel sheet, the heating coil is provided with a heating coil. It is necessary to maintain a required amount of heat input by controlling the magnetic field by adjusting the high-frequency current value and the gap between the heating coil and the steel plate to target values.
[0007]
However, the high-frequency induction heating strain removing device shown in FIG. 2 is configured so that the traveling carriage 011 mounted with the heating device 010 having the amplification transformer 012 and the heating coil 013 travels on the surface of the steel plate 20. Therefore, when the surface of the steel plate 20 is deformed such as undulation, even if the gap between the heating coil 013 and the surface of the steel plate 20 is set to a required value, the deformation of the surface of the steel plate 20 is performed. A gap (deviation) of the gap corresponding to the amount is generated, and it is practically impossible to control the gap to a target value. Therefore, the amount of heat input to the surface of the steel plate 20 varies.
And the like.
[0008]
The present invention has been made in view of the problems of the related art, and enables the gap between the heating coil and the surface of the steel material to be constantly maintained at a target value without being affected by the surface shape of the steel material and the traveling of the traveling vehicle equipped with the heating device. It is an object of the present invention to provide a steel material strain removing device capable of controlling the amount of heat input to a steel material by an electric current with high accuracy.
[0009]
[Means for Solving the Problems]
In order to solve this problem, the present invention, as an invention according to claim 1, amplifies a high-frequency current from a power supply by an amplification transformer and energizes a heating coil disposed with a predetermined gap from the surface of the steel material. A heating device configured to generate heat due to the induced current in the steel material and heat the vicinity of the deformed portion of the steel material to thereby remove the deformed portion and distortion near the deformed portion, and to be movable on the steel material. In a steel material distortion removing apparatus provided with a traveling carriage provided with the heating device, the traveling body can be moved up and down independently of the carriage body in a carriage body supporting traveling wheels of the traveling carriage, and An amplifying transformer that is provided movably on the surface of the steel material and amplifies the current from the power supply and supplies the heating coil to the heating coil; and a support member that supports the heating coil. Suggest distortion removal apparatus of a steel material characterized by comprising a heating coil gap adjusting mechanism allowed to hold the gap between the surface of the steel material to a predetermined gap.
[0010]
In the first aspect, it is preferable to configure as in the second and third aspects.
That is, according to claim 2, the heating coil gap adjusting mechanism is interposed between the support member and the bogie main body, and is urged in a direction for bringing the support member into contact with the surface of the steel material, and the bogie. A magnet device for applying a spring force to the spring so that a height position of the support member from the steel material surface via the main body is constant.
[0011]
According to a third aspect of the present invention, a guide roller is provided below the support member so as to be in contact with the surface of the steel material and move the support member along the surface of the steel material, and the spring is formed of a disc spring.
[0012]
According to this invention, the amplification transformer and the heating coil are supported by the support member provided in the bogie main body so as to be vertically movable independently of the bogie main body. 4. The guide roller according to claim 3, which is supported at a lower portion of said support member by a spring of a heating coil gap adjusting mechanism interposed between said guide member and said guide roller, said guide roller being brought into contact with a surface of said steel member, and a height of said support member from said steel surface by a magnet device. The spring force is applied to the spring so that the spring position becomes constant.
[0013]
Therefore, according to the invention, even if there is deformation such as undulation on the steel material surface, the heating is performed by the spring in which the spring force is applied by the magnet device so that the height position of the support member from the steel material surface becomes constant. The guide roller of the support member supporting the coil can be brought into contact with the steel material surface without seeing the support member and the guide roller jumping up or generating excessive contact force. The gap can always be maintained at the target value.
[0014]
As a result, the gap between the heating coil and the surface of the steel material can be constantly maintained at the target value without being affected by the surface shape of the steel material and the traveling of the traveling vehicle equipped with the heating device. Heat input can be controlled with high accuracy.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail using embodiments shown in the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just
[0016]
FIG. 1 is a side view of a high-frequency induction heating and strain removing device for steel materials according to an embodiment of the present invention.
[0017]
In the drawing, reference numeral 20 denotes a steel plate to which welding has been applied, and reference numeral 11 denotes a traveling carriage that can run on the steel plate 20 along a welding bead.
Reference numeral 16 denotes a bogie main body constituting an outer shell of the traveling bogie 11, and a power supply 17 is mounted inside. Reference numeral 15 denotes four wheels rotatably mounted on the front and rear lower portions of the bogie main body 16. The wheels 15 are configured by a magnet mechanism that rolls while constantly contacting the surface of the steel plate 20 by magnetic force and causes the traveling carriage 11 to travel.
[0018]
Reference numeral 1 denotes an internal support member provided inside the carriage main body 16 so as to be vertically movable independently of the carriage main body 16. The inner support member 1 has a substantially gate-shaped side surface formed by coupling a vertical member 7 extending vertically downward from the front and rear ends of a horizontal member 3 provided horizontally at an upper portion, and a lower portion of the front and rear vertical members 7. , A guide roller 4 that can roll on the surface of the steel plate 20 is rotatably mounted.
Reference numeral 2 denotes a spring interposed between the upper inner surface of the bogie main body 16 and the upper surface of the horizontal member 3 of the internal support member 1. The upper inner surface of the bogie main body 16 causes the back of the spring 2 to move with the internal support member. One side is pressed. The spring 2 may be a disc spring or a coil spring as in this embodiment.
The front and rear ends of the internal support member 1 are in contact with the front and rear inner surfaces of the bogie main body 16 at the thrust surface 14, and the internal support member 1 follows the front and rear movement of the bogie main body 16 due to the rotation of the wheels 15. The surface of the steel plate 20 can be moved back and forth through the guide roller 4.
[0019]
An amplifying transformer 12 for amplifying a current supplied from the power supply 17 via the conducting wire 6 is fixed to a lower portion of the horizontal member 3 of the inner support member 1, and an amplifying transformer 12 is provided below the amplifying transformer 12. A heating coil 13 to which the amplified large current is passed through the conducting wire 6 is fixed via the coil supporting member 5.
Further, a gap C is formed between the lower surface of the heating coil 13 and the surface of the steel plate 20 for applying a high-frequency current to the heating coil 13 to generate heat in the steel plate 20 due to the induced current. I have.
[0020]
At the time of welding distortion removal by the high-frequency induction heating distortion removing device having such a configuration, when the wheels 15 of the traveling vehicle 11 are rotationally driven, the truck body 16 of the traveling vehicle 11 moves along the welding bead on the steel plate 20. Accordingly, the internal support member 1 to which the amplification transformer 12 and the heating coil 13 are attached moves together with the bogie main body 16.
On the other hand, the current supplied from the power supply 17 is supplied to the amplifying transformer 12 through the conducting wire 6, amplified by the amplifying transformer 12 into a high-frequency current having a large current value, and supplied to the heating coil 13 through the conducting wire 6. Is done. An induction current (eddy current) is generated in the steel plate 20 adjacent to the heating coil 13 with a gap C by the high-frequency current flowing through the heating coil 13, and the steel plate 20 is welded by Joule heat caused by the induction current. The vicinity of the part is heated to remove the distortion of the part.
[0021]
At the time of such welding distortion removal work, the amplification transformer 12 and the heating coil 13 are supported by the internal support member 1 which is provided to be vertically movable independently of the bogie main body 16 of the traveling bogie 11. A high-frequency current is passed between the steel plate 20 and the steel plate 20 to form a gap C required to generate heat due to the induced current in the steel plate 20, and the gap C is interposed between the internal support member 1 and the bogie main body 16. The guide roller 4 attached to the lower portion of the internal support member 1 is brought into contact with the surface of the steel plate 20 by the spring force of a spring 2 (which may be a coil spring) made of a disc spring.
On the other hand, since the wheels 15 formed of a magnet mechanism roll while constantly contacting the surface of the steel plate 20 by magnetic force to cause the traveling carriage 11 to travel, the spring 2 is moved by the carriage body 16 of the traveling carriage 11. The back portion is pressed, and the height H of the internal support member 1 from the surface of the steel plate 20 is always kept constant by the pressing of the spring 2.
[0022]
For this reason, the internal supporting member 1 to which the amplification transformer 12 and the heating coil 13 are attached is guided by the guide roller 4 so that the height H between the inner supporting member 1 and the surface of the steel plate 20 is always constant by the spring force of the spring 2. Is moved together with the traveling vehicle 11 while being pressed against the surface of the steel plate 20 via the plate, so that the gap C between the heating coil 13 and the surface of the steel plate 20 is always kept constant.
[0023]
Accordingly, even if the surface of the steel plate 20 is deformed by undulation or the like, the pressing action of the wheel 15 from the back of the spring 2 by the magnet 15 and the guide roller of the internal support member 1 by the spring 2 are performed. 4 causes the guide roller 4 of the internal support member 1 supporting the heating coil 13 to jump or excessively contact the guide roller 4 of the internal support member 1. It is possible to bring the steel sheet 20 into contact with the surface without generating any force.
Therefore, according to this embodiment, the gap C between the heating coil 13 and the surface of the steel plate 20 is always set to the target value without being affected by the surface shape of the steel plate 20 and the traveling of the traveling vehicle 11 on which the heating device 10 is mounted. , And the amount of heat input to the steel plate 20 by the induced current can be controlled with high accuracy.
[0024]
【The invention's effect】
As described above, according to the present invention, even if there is a deformation such as undulation on the steel material surface, the spring is applied by the magnet device so that the height of the support member from the steel material surface becomes constant. The guide roller of the support member supporting the heating coil can be brought into contact with the steel material surface without seeing the support member and the guide roller jumping up or generating excessive contact force. The gap with the surface can always be maintained at the target value.
[0025]
Therefore, according to the present invention, it is possible to always maintain the gap between the heating coil and the surface of the steel material at a target value without being affected by the surface shape of the steel material and the traveling of the traveling vehicle equipped with the heating device. Can control the amount of heat input to the steel material with high accuracy.
[Brief description of the drawings]
FIG. 1 is a side view of a high-frequency induction heating and strain-removing apparatus for steel materials according to an embodiment of the present invention.
FIG. 2 is an external side view showing a schematic configuration of a high-frequency induction heating strain removing device according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Internal support member 2 Spring 3 Horizontal member 4 Guide roller 7 Vertical member 11 Traveling trolley 12 Amplification transformer 13 Heating coil 15 Wheel 16 Dolly main body 17 Power supply 20 Steel plate C Gap

Claims (3)

A high-frequency current from a power source is amplified by an amplification transformer, and a heating coil disposed with a predetermined gap from the surface of the steel material is supplied with electricity. A heating device configured to remove the distortion in the deformed portion and its vicinity by heating the heating device, and a traveling bogie provided with the heating device movably provided on the steel material. In the distortion removing device, a current is supplied from the power source while a vertically movable and movable surface of the steel material is provided in a bogie main body that supports a traveling wheel of the traveling bogie independently of the bogie main body. A supporting member for supporting the heating coil and the amplification transformer for supplying the heating coil to the heating coil, and a heating coil gap adjustment for maintaining a predetermined gap between the heating coil and the surface of the steel material via the supporting member. Distortion removal apparatus of a steel material, characterized by comprising a mechanism. The heating coil gap adjusting mechanism is interposed between the support member and the bogie main body, and is urged in a direction to bring the support member into contact with the surface of the steel material, and the support member via the bogie main body. 2. The steel material strain removing device according to claim 1, further comprising: a magnet device for applying a spring force to the spring so that a height position from the surface of the steel material is constant. 2. The device according to claim 1, wherein a guide roller is provided at a lower portion of the support member so as to be in contact with the surface of the steel material and move the support member along the surface of the steel material, and the spring is a disc spring. Equipment for removing strain from steel.

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