JP4015481B2 - Steel strain relief device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to the removal of distortion generated in a hull welded part or the like in a ship, and heat generated by an induced current is generated in the steel material by a heating coil installed with a predetermined gap from the surface of the steel material and energized with a high-frequency current. The present invention relates to a steel material strain removing device in which a heating device is mounted on a traveling carriage and moved on the surface of the steel material, and the vicinity of the deformed portion of the steel material is heated to remove the strain.
[0002]
[Prior art]
In the hull of a ship, especially a hull occupying most of a thin steel plate such as a passenger ship, deformation occurs due to heat input during welding as well as the weight of the steel. As a means for removing distortion due to such deformation, a means for 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 to correct the deformation of the steel material is often used.
[0003]
However, in the means for heating the deformed portion and the vicinity thereof with a high-temperature gas using such a gas burner, the strain removing operation itself is simple, but the deformed portion such as a weld bead portion and the vicinity thereof are heated by gas. Therefore, it is difficult to adjust the amount of heat input, and since the distortion is removed by adding human factors such as empirical factors of the operator, it is practical to surely remove the distortion so that the steel has the target shape. Is impossible.
As a means for coping with such a problem, a strain relief device using 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 remover proposed in Japanese Patent Laid-Open No. 11-170081.
In the figure, reference numeral 010 denotes a heating device having a configuration which will be described later, and is mounted on a traveling carriage 011 which can travel on the steel plate 20 by a motor 017. Reference numeral 015 denotes wheels of the traveling carriage 011.
In the heating device 010, 012 is an amplification transformer that amplifies a current from a power source (not shown). Reference numeral 013 denotes a heating coil disposed on the surface of the steel plate 20 with a predetermined gap, and is wound around a ferrite core 018, and a high-frequency current amplified by the amplification transformer 012 is energized.
[0005]
In such a high-frequency induction heating strain relief device, the traveling carriage 011 is caused to travel on the steel plate 20 along the weld bead, and a current supplied from a power source (not shown) is converted into a high-frequency current having a large current value by the amplification transformer 012. By applying a current to the heating coil 013, an induced current (eddy current) is generated in the steel plate 20 adjacent to the heating coil 013, and the vicinity of the welded portion of the steel plate 20 is heated by Joule heat accompanying the induced current. , Removing the distortion of the part.
[0006]
[Problems to be solved by the invention]
In a high-frequency induction heating strain relief device equipped with a heating device that applies high-frequency current to a heating coil arranged with a predetermined gap from the surface of the steel plate to generate heat due to induction current in the steel plate, it is applied to the 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 to be applied and the gap between the heating coil and the steel plate to a target value.
[0007]
However, the high-frequency induction heating strain relief device shown in FIG. 2 is configured to run a traveling carriage 011 equipped with a heating device 010 having an amplification transformer 012 and a heating coil 013 on the surface of the steel plate 20. Therefore, when deformation such as undulation occurs on the surface of the steel plate 20, even if the gap between the heating coil 013 and the surface of the steel plate 20 is set to a required value, the surface of the steel plate 20 is deformed. A gap deviation (deviation) corresponding to the amount occurs, and it is substantially impossible to control the gap to a target value, and therefore, variation occurs in the amount of heat input to the surface of the steel plate 20.
And so on.
[0008]
In view of the problems of the prior art, the present invention can maintain the gap between the heating coil and the surface of the steel material at a target value without being influenced by the surface shape of the steel material and the traveling of the traveling carriage equipped with the heating device. An object of the present invention is to provide a strain relief device for steel that can control the heat input to the steel by electric current with high accuracy.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides the steel material according to claim 1, wherein a high-frequency current from a power source is amplified by an amplification transformer and energized to a heating coil disposed close to the surface of the steel material. A heating device configured to remove the distortion caused by the deformation of the steel material by heating the deformed portion facing the heating coil of the steel material and the vicinity thereof by causing heat generation due to the induction current in the steel material, and the steel material Oite the strain relief device of steel and a traveling carriage for the heating device provided movably up is mounted,
In the carriage main body that supports the traveling wheels of the traveling carriage, the carriage can be moved up and down independently of the carriage main body and movable on the surface of the steel material, and the current from the power source is amplified and applied to the heating coil. An amplification transformer to be supplied; a support member that supports the heating coil; and a heating coil gap adjustment mechanism that holds a gap between the heating coil and the surface of the steel material in a predetermined gap via the support member ,
The heating coil gap adjusting mechanism has a magnetic force acting on the traveling wheel and a spring interposed between the support member and the carriage body and biased in a direction to bring the support member into contact with the surface of the steel material. The wheel is always pressed by the magnetic force by the pressing action from the back of the spring by the wheel through the cart body and the pressing action of the internal support member by the spring on the steel plate surface through the guide roller. The steel truck is configured to roll while contacting the surface of the steel plate so that the height position of the support member from the steel material surface is constant through the cart body . A distortion removing device is proposed.
[0010]
In Claim 1, it is preferable to constitute as in Claim 2 .
[0011]
According to a second aspect of the present invention, a guide roller is attached to the lower portion of the support member so as to roll on the steel material surface and move the support member along the steel material surface, and the spring is constituted by a disc spring.
[0012]
According to the invention, the該台vehicle body into the carriage main body independently support the amplified transformer and heating coil to a support member which is vertically movable, is interposed between the supporting support member and the truck body the guide roller of claim 2 wherein supported by the support member lower portion by a spring of the heating coil gap adjusting mechanism with Ru brought into contact with the steel surface, the height from the steel surface of the support member by the magnet device is constant Thus, a spring force is applied to the spring.
[0013]
Therefore, according to such an invention, even if there is a deformation such as undulation on the surface of the steel material, the heating is performed by the spring to which the spring force is applied by the magnet device so that the height position of the support member from the steel material surface is constant. The guide roller of the support member supporting the coil can be brought into contact with the steel 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 carriage equipped with the heating device. The amount of heat input can be controlled with high accuracy.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
[0016]
FIG. 1 is a side configuration diagram of a high frequency induction heating strain relief device for steel according to an embodiment of the present invention.
[0017]
In the figure, reference numeral 20 denotes a steel plate on which welding has been performed, and 11 denotes a traveling carriage which can travel on the steel plate 20 along the weld bead.
Reference numeral 16 denotes a main body of the carriage that constitutes the outline of the traveling carriage 11, and a power source 17 is mounted therein. Reference numeral 15 denotes four wheels rotatably attached to the front and rear lower portions of the carriage body 16. The wheel 15 is configured by a magnet mechanism that rolls while traveling on the traveling carriage 11 while always contacting the surface of the steel plate 20 by magnetic force.
[0018]
Reference numeral 1 denotes an internal support member provided in the cart body 16 so as to be movable up and down independently of the cart body 16. The internal support member 1 is formed in a substantially gate shape with a side face shape connecting a vertical member 7 extending vertically downward from front and rear end portions 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 attached.
Reference numeral 2 denotes a spring interposed between the upper inner surface of the carriage main body 16 and the upper surface of the horizontal member 3 of the inner support member 1. The upper inner surface of the carriage main body 16 allows the back of the spring 2 to be connected to the inner support member. 1 side is pressed. The spring 2 may be a disc spring or a coil spring as in this embodiment.
The front and rear end portions of the inner support member 1 are in contact with the front and rear inner surfaces of the cart body 16 at the thrust surface 14, and the inner support member 1 follows the back and forth movement of the cart body 16 due to the rotation of the wheels 15. The surface of the steel plate 20 can be moved back and forth via the guide roller 4.
[0019]
An amplifying transformer 12 for amplifying the current supplied from the power source 17 via the conductor 6 is fixed to the lower part of the horizontal member 3 of the internal support member 1, and further, the amplifying transformer 12 is provided below the amplifying transformer 12. A heating coil 13 through which the amplified large current is energized via the conductive wire 6 is fixed via the coil support member 5.
In addition, a gap C is formed between the lower surface of the heating coil 13 and the surface of the steel plate 20 so that a high-frequency current is passed through the heating coil 13 to cause the steel plate 20 to generate heat due to the induced current. Yes.
[0020]
At the time of welding distortion removal work by the high-frequency induction heating strain removing device having such a configuration, when the wheel 15 of the traveling carriage 11 is rotationally driven, the carriage body 16 of the traveling carriage 11 moves on the steel plate 20 along the weld bead. Accordingly, the internal support member 1 to which the amplification transformer 12 and the heating coil 13 are attached moves together with the cart body 16.
On the other hand, the current supplied from the power source 17 is supplied to the amplifying transformer 12 through the conducting wire 6, and is amplified to a high-frequency current of a large current value in the amplifying transformer 12 and energized to the heating coil 13 through the conducting wire 6. Is done. Then, an induction current (eddy current) is generated in the steel plate 20 adjacent to the heating coil 13 with a gap C due to the high-frequency current flowing in the heating coil 13, and the steel plate 20 is welded by Joule heat accompanying the induction current. The vicinity of the part is heated to remove the distortion of the part.
[0021]
During the welding distortion removal operation, the amplification transformer 12 and the heating coil 13 are supported by the internal support member 1 provided so as to be movable up and down independently of the carriage main body 16 of the traveling carriage 11, and the heating coil 13. A gap C required to cause a heat generation due to the induced current to be generated in the steel plate 20 by passing a high-frequency current between the inner support member 1 and the steel plate 20 is interposed between the internal support member 1 and the carriage main body 16. The guide roller 4 attached to the lower part 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 made of a disc spring (or a coil spring).
On the other hand, the wheel 15 configured by the magnet mechanism rolls while constantly contacting the surface of the steel plate 20 due to the magnetic force to run the traveling carriage 11, so that the spring 2 is moved by the carriage body 16 of the traveling carriage 11. When the back portion is pressed and the spring 2 is pressed, the height H of the internal support member 1 from the surface of the steel plate 20 is always kept constant.
[0022]
For this reason, the guide roller 4 has a constant height H between the inner support member 1 to which the amplification transformer 12 and the heating coil 13 are attached and the surface of the steel plate 20 at all times by the spring force of the spring 2. , It is moved together with the traveling carriage 11 while being pressed against the surface of the steel plate 20, so that the gap C between the heating coil 13 and the surface of the steel plate 20 is always kept constant.
[0023]
As a result, even if the surface of the steel plate 20 is deformed, such as a swell, the pressing action from the back of the spring 2 by the wheel 15 constituted by a magnet mechanism, and the guide roller of the internal support member 1 by the spring 2 4, the guide roller 4 of the internal support member 1 supporting the heating coil 13 is caused to jump and excessive contact between the internal support member 1 and the guide roller 4. It becomes possible to make it contact the steel plate 20 surface, without seeing generation | occurrence | production of 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 carriage 11 on which the heating device 10 is mounted. Therefore, 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 when the surface of the steel material is deformed, such as undulation, the spring force is applied by the magnet device so that the height position of the support member from the surface of the steel material is constant. The guide roller of the support member that supports the heating coil can be brought into contact with the steel 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, 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 carriage equipped with the heating device. It is possible to control the amount of heat input to the steel material with high accuracy.
[Brief description of the drawings]
FIG. 1 is a side configuration diagram of a high frequency induction heating strain relief device for steel 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 relief device according to the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Internal support member 2 Spring 3 Horizontal member 4 Guide roller 7 Vertical member 11 Traveling carriage 12 Amplifying transformer 13 Heating coil 15 Wheel 16 Dolly body 17 Power supply 20 Steel plate C Gap

Claims (2)

A high-frequency current from a power source is amplified by an amplifying transformer and energized to a heating coil disposed close to the surface of the steel material, and heat generation due to induction current occurs in the steel material, and the steel material is deformed to face the heating coil. A heating device configured to remove distortion caused by deformation of the steel material by heating the portion and the vicinity thereof, and a traveling carriage that is movably provided on the steel material and on which the heating device is mounted, Oite the strain relief device of steel having a
In the carriage main body that supports the traveling wheels of the traveling carriage, the carriage can be moved up and down independently of the carriage main body and movable on the surface of the steel material, and the current from the power source is amplified and applied to the heating coil. An amplification transformer to be supplied; a support member that supports the heating coil; and a heating coil gap adjustment mechanism that holds a gap between the heating coil and the surface of the steel material in a predetermined gap via the support member ,
The heating coil gap adjusting mechanism has a magnetic force acting on the traveling wheel and a spring interposed between the support member and the carriage body and biased in a direction to bring the support member into contact with the surface of the steel material. The wheel is always pressed by the magnetic force by the pressing action from the back of the spring by the wheel through the cart body and the pressing action of the internal support member by the spring on the steel plate surface through the guide roller. The steel truck is configured to roll while contacting the surface of the steel plate so that the height position of the support member from the steel material surface is constant through the cart body . Distortion removal device.   2. The guide roller according to claim 1, wherein a guide roller is attached to a lower part of the support member so as to roll-contact with the surface of the steel material and move the support member along the steel material surface, and the spring is constituted by a disc spring. Steel strain remover.

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