JP4015480B2 - Cooling method and apparatus for welding distortion removing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to the removal of welding distortion generated in a hull welded part or the like in a ship, and generates heat due to an induction current in a steel coil that is installed with a predetermined gap from the surface of the steel and energized with high-frequency current. The present invention relates to a cooling method and apparatus for a welding strain removing device in which a heating device for removing welding strain is mounted on a traveling carriage and cooling water is passed through the heating device to cool it.
[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.
However, in such means, it is difficult to adjust the amount of heat input due to gas heating of the deformed portion such as the weld bead portion and the vicinity thereof, and the removal of distortion requires an artificial factor such as an empirical factor of the operator. In addition, since it is performed, it is substantially impossible to surely remove the strain so that the steel material has a target shape.
[0003]
FIG. 2 is an external side view showing a schematic configuration of a high-frequency induction heating strain relief device and its cooling device proposed in Japanese Patent Laid-Open No. 11-170081 as means for coping with such problems.
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.
[0004]
Reference numeral 019 denotes a cooling unit having a heat exchanging function, 023 denotes a cooling water supply pipe for connecting the cooling unit and a required cooling member of the heating device 010, that is, the amplification transformer 012 and the heating coil 013, and 024 denotes the cooling required member. This is a cooling water return pipe that connects the cooling water outlet of the heating coil 013 and the cooling unit 019. Reference numeral 022 denotes a cooling water pump provided in the cooling water supply pipe 023.
[0005]
In such a high-frequency induction heating strain relief device and its cooling 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 supplied to the high-frequency current having a large current value by the amplification transformer 012. By applying the high-frequency 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 welded portion of the steel plate 20 is caused by Joule heat accompanying the induced current. The vicinity is heated to remove distortion of the weld.
[0006]
The cooling water sent from the cooling unit 019 to the heating device 010 through the cooling water supply pipe 023 by the cooling water pump 022 cools the amplification transformer 012 and the heating coil 013, and then passes through the cooling water return pipe 024. It returns to the cooling unit 019, is recooled, and circulates through the cooling path.
On the other hand, although not shown, the welded portion heated by the heating coil 013 and the vicinity thereof are separately cooled by tap water.
[0007]
[Problems to be solved by the invention]
In the cooling means of the heating device 010 in the high-frequency induction heating strain relief device shown in FIG. 2, the cooling water from the cooling unit 019 having a heat exchange function is amplified by the cooling water pump 022 as described above. 012 is equipped with a closed-loop cooling system that circulates the necessary cooling members of the heating device 010 such as the heating coil 013.
[0008]
For this reason, special cooling equipment such as the cooling unit 019 and the cooling water pump 022 is required, and the cost of the high-frequency induction heating strain relief device is high, and the cooling equipment is large and cannot be handled freely and handled. Therefore, the work efficiency is not good and the work efficiency of welding distortion reduction is reduced.
In addition, a dedicated space for installing the cooling device is required, and the effective use of the space in the distortion removing work factory is hindered.
And so on.
[0009]
In view of the problems of the prior art, the present invention can improve the work efficiency of welding distortion removal by cooling the required cooling members of heating devices such as amplification transformers and heating coils with an easy and simple structure. It is an object of the present invention to provide a cooling method and apparatus for a welding distortion removing apparatus that enables effective use of a factory space without requiring a space, and further reduces the apparatus cost.
[0010]
[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 amplifying transformer and energized to a heating coil disposed close to the surface of the steel material. the the heating apparatus configured to remove the welding strain by heating the weld facing the heating coil of the steel material to rise to heat generation by induction current and the portion near to, movable on said steel In the cooling method of the welding distortion removing device, which is mounted on the traveling carriage and cooled by passing cooling water through the heating device,
Tap water used as the cooling water, after the water tap water was cooling the amplifying transformer and heating coil leads to the cooling water passage in said amplifying transformer and heating coils, cooling water provided the tap water to the traveling carriage A cooling method for a welding strain removing apparatus is proposed, characterized in that a supply portion is supplied to a welded portion of the steel material and the vicinity thereof to cool the portion.
[0011]
Preferably, the tap water is led to a power source mounted on the traveling carriage, the power source is cooled, and then the amplification transformer and the heating coil are cooled in this order. Water may be supplied to the welded part of the steel material and the vicinity thereof to cool the part.
[0012]
A third aspect of the present invention relates to an apparatus for carrying out the method of the first or second aspect, wherein the heating coil is arranged close to the surface of the steel material by amplifying a high-frequency current from a power source with an amplification transformer. It energized, and rise to heat generation by induction current to the steel and weld steel material and the heating device is configured to remove welding distortion by heating the vicinity of sites movably on the steel In the cooling device of the welding strain removing device, provided with a traveling carriage provided and mounted with the heating device, and configured to flow cooling water through the heating device and cool it,
Ejecting said amplification transformer and tap water pipe for supplying tap water to the cooling passages in the heating coil, the tap water was passed the cooling passages provided in the traveling carriage to weld and nearby portions of the steel And a cooling water jetting means.
[0013]
According to this invention, the tap water is introduced as the cooling water for the cooling member required for the heating device, and the tap water is guided to the traveling carriage, and the power supply, the amplification transformer, Cooling required members such as heating coils are cooled in this order, and the tap water after cooling the heating device required cooling members is jetted from the cooling water jetting means provided in the traveling carriage to the welded portion of the steel material and its vicinity. The welded part and its vicinity are cooled.
[0014]
Therefore, according to this invention, tap water which has been used as waste water after cooling a welded portion heated by a heating coil and its vicinity is used as cooling water for a cooling member required for a heating device mounted on a traveling carriage. Since it is used for cooling the welded portion of the steel material and the vicinity thereof, the cooling unit for cooling the cooling member as in the prior art, the special cooling equipment such as the cooling water pump, and these equipment and the heating device There is no need for a closed-loop cooling system that connects the other cooling members.
[0015]
Thereby, it is possible to continuously perform the cooling of the heating device-requiring cooling member such as the amplification transformer and the heating coil and the cooling of the welded portion of the steel material and the vicinity thereof by the tap water. In addition, it is possible to perform the cooling of the heating device required cooling member and the vicinity of the welded portion of the steel material without requiring a dedicated space with an easy and simple structure that does not require a closed loop cooling system, and welding. The apparatus cost of the distortion removing apparatus can be reduced and the work efficiency of welding distortion removal can be improved.
[0016]
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.
[0017]
FIG. 1 is an external side view showing a schematic configuration of a steel material high-frequency induction heating strain relief device and a cooling device thereof according to an embodiment of the present invention.
[0018]
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 constituted by a magnet mechanism that rolls the traveling carriage 11 while constantly contacting the surface of the steel plate 20 by magnetic force.
[0019]
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 comprising a disc spring or a coil spring interposed between the upper inner surface of the cart body 16 and the upper surface of the horizontal member 3 of the internal support member 1. 2 is pressed against the inner support member 1 side.
The front and rear end portions of the inner support member 1 are in contact with the front and rear inner surfaces of the carriage main body 16 at the thrust surface 14, and the inner support member 1 follows the movement of the carriage main body 16 by the rotation of the wheel 15. The surface of the steel plate 20 can be moved back and forth via the guide roller 4.
[0020]
An amplifying transformer 12 for amplifying the current supplied from the power source 17 through a conductor is fixed to the lower part of the horizontal member 3 of the internal support member 1, and further amplified by the amplifying transformer 12 below the amplifying transformer 12. The heating coil 13 through which the large current is passed through the conducting wire is fixed via the coil support 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 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.
[0021]
A tap water pipe 21 is connected to the cooling water passage 17a in the power source of the power source 17. An open / close valve 22 opens and closes the passage of the tap water pipe 21. 12a is a transformer cooling water passage provided in the amplification transformer 12, 13a is a coil cooling water passage provided in the heating coil 13, and 24 is an outlet of the power supply cooling water passage 17a and a transformer cooling water. A cooling water pipe 27 connecting the inlet of the passage 12a, and 27 is a cooling water pipe connecting the outlet of the transformer cooling water passage 12a and the inlet of the coil cooling water passage 13a.
[0022]
A cooling water nozzle 26 ejects cooling water (tap water) on the surface of the steel plate 20, and is provided at a rear portion in the traveling direction of the carriage main body 16 constituting the traveling carriage 11, and in a case formed in the carriage main body 16. It is connected to the cooling water passage 16a. A cooling water pipe 25 connects the outlet of the in-coil cooling water passage 13a and the in-case cooling water passage 16a.
[0023]
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 a conducting wire (not shown), and is amplified to a high-frequency current having a large current value in the amplifying transformer 12 through a conducting wire (not shown). The heating coil 13 is energized. 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.
[0024]
On the other hand, tap water (cooling water) introduced from the tap water pipe 21 into the power source cooling water passage 17a of the power source 17 by opening the on-off valve 22 flows through the power source cooling water passage 17a to cool the power source 17. Then, it passes through the cooling water pipe 24 and enters the cooling water passage in the transformer 12a.
Then, the tap water that has cooled the amplification transformer 12 through the in-transformer cooling water passage 12a enters the in-coil cooling water passage 13a through the cooling water pipe 24, flows through the in-coil cooling water passage 13a, and passes through the heating coil 13. After cooling, the cooling water pipe 25 passes through the in-case cooling water passage 16a.
[0025]
Cooling water (tap water) that has passed through the in-case cooling water passage 16a is ejected from the cooling water nozzle 26 toward the surface around the welded portion of the steel plate 20. The ejection of the cooling water toward the surface around the welded portion is performed from the cooling water nozzle 26 provided at the rear portion of the carriage main body 16 of the traveling carriage 11 while the traveling carriage 11 is running, Cool around it.
[0026]
According to this embodiment, tap water that has been conventionally used as waste water after cooling the welded portion of the steel plate 20 heated by the heating coil 13 and its vicinity is used as a cooling member of the heating device 10 mounted on the traveling carriage 11. Since it is used as cooling water for a certain power source 17, amplification transformer 12, and heating coil 13, it is used for cooling the welded portion of the steel plate 20 and its vicinity, so that the heating device such as the amplification transformer and heating coil needs to be cooled with tap water The cooling of the member and the cooling of the welded portion of the steel material and the vicinity thereof can be performed continuously, and the cooling unit 019 for cooling the cooling member as in the prior art of FIG. Installation space can be reduced with a simple structure that does not require any cooling equipment and a closed-loop cooling system that connects these equipment and the necessary cooling members of the heating device 10; The cost of the device.
[0027]
【The invention's effect】
As described above, according to the present invention, tap water which has been conventionally used as waste water after cooling a welded portion heated by a heating coil and its vicinity is used as cooling water for a cooling member required for a heating apparatus mounted on a traveling carriage. Since it is used for cooling the welded part of steel material and the vicinity thereof, it is used as a cooling unit for cooling necessary cooling members as in the prior art, a special cooling device such as a cooling water pump, and these devices and a heating device There is no need for a closed-loop cooling system that connects the other cooling members.
[0028]
Thereby, it is possible to continuously perform the cooling of the heating device-requiring cooling member such as the amplification transformer and the heating coil and the cooling of the welded portion of the steel material and the vicinity thereof by the tap water. In addition, it is possible to perform the cooling of the heating device required cooling member and the vicinity of the welded portion of the steel material without requiring a dedicated space with an easy and simple structure that does not require a closed loop cooling system, and welding. The apparatus cost of the distortion removing apparatus can be reduced and the work efficiency of welding distortion removal can be improved.
[Brief description of the drawings]
FIG. 1 is an external side view showing a schematic configuration of a steel material high-frequency induction heating strain relief device and a cooling device thereof 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 12a Transformer cooling water passage 13 Heating coil
13a Coil cooling water passage 15 Wheel 16 Bogie body 16a Case cooling water passage 17 Power source 17a Power supply cooling water passage 20 Steel plate 21 Tap water pipe 26 Cooling water nozzle

Claims (3)

Welding facing the heating coil of the steel material by amplifying high-frequency current from the power source with an amplifying transformer and energizing a heating coil disposed close to the surface of the steel material, causing heat generation by induction current in the steel material the the heating apparatus configured to remove the welding distortion by heating part and its vicinity of the site, is mounted on the traveling carriage which is movable on said steel, it flows through the cooling water to the heating device In the cooling method of the welding distortion removing device adapted to cool this,
Tap water used as the cooling water, after the water tap water was cooling the amplifying transformer and heating coil leads to the cooling water passage in said amplifying transformer and heating coils, cooling water provided the tap water to the traveling carriage A cooling method for a welding strain removing apparatus, wherein a supply portion is supplied to a welded portion of the steel material and the vicinity thereof to cool the portion.   The tap water is guided to a power source mounted on the traveling carriage, the power source is cooled, and then the amplification transformer and the heating coil are cooled in this order, and then the tap water is supplied to the welded portion of the steel material and its vicinity. The method of claim 1, wherein the portion is cooled. A high-frequency current from the power source is amplified by the amplifier transformer energizing the heating coil disposed proximate to the surface of the steel material, the weld and its vicinity portion of the steel material to rise to heat generation by induction current to the steel A heating device configured to remove welding distortion by heating the steel, and a traveling carriage that is movably provided on the steel material and on which the heating device is mounted. Cooling water is passed through the heating device. In the cooling device of the welding strain relief device configured to flow and cool this,
Ejecting said amplification transformer and tap water pipe for supplying tap water to the cooling passages in the heating coil, the tap water was passed the cooling passages provided in the traveling carriage to weld and nearby portions of the steel A cooling device for a welding strain removing device, comprising: a cooling water jetting unit.

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