JPH0627278Y2 - Low distortion welding equipment for thin plate structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a low distortion welding apparatus suitable for butt fillet welding of a three-dimensional thin plate structure for shipbuilding.

[Conventional technology]

Conventionally, when performing butt fillet welding of a three-dimensional thin plate structure for shipbuilding by an arc welding method, as shown in the perspective view of FIG. Board 3
In a square shape, and along the butt fillet weld joint of the base plate 1, the vertical plate 2, and the horizontal plate 3, the welding carriage 7 equipped with the welding torch 4, wire 5 and control panel 6 is run to perform fillet welding. The weld bead 8 is formed by welding, but in the welded thin plate structure, as shown in the front view of FIG. 3, the base plate 1 is flexibly deformed 1'due to a large welding heat input. .

Therefore, after welding, point-shaped and linear heating is applied by a gas burner to remove the strain, and the unevenness is finished to a flat surface. This strain-removing work is a skilled work that requires feeling and experience. Therefore, a lot of time and man-hours are required, which hinders production efficiency.

[Problems to be solved by the device]

The present invention has been proposed in view of such circumstances,
A thin plate structure capable of suppressing heat input to the thin plate structure and removing yield strain to suppress or remove the strain during welding, thereby reducing the welding work time and man-hours and improving welding accuracy. It is an object of the present invention to provide a low distortion welding device.

[Means for Solving the Problems]

To this end, the present invention provides a welding device for performing arc welding on a welded joint portion of a thin plate to be welded constituting a three-dimensional structure, and a high sublimation solid particle attached to the welding device at a high speed on the surface of the thin plate to be welded. It is characterized by having means for attaching.

[Action]

In the device of the present invention, the heat input to the thin plate to be welded is suppressed by the cooling effect of the sublimation action of the sprayed solid particles, and the yield strain can be removed by the spray impact action. It is possible to suppress or remove it, and eventually to reduce the welding work time and man-hour and improve the welding accuracy.

〔Example〕

One embodiment of the low distortion welding apparatus for thin plate structures according to the present invention will be described with reference to the front view of FIG.

In FIG. 1, a wire 5 is supplied from the tip of the welding torch 4 to the butt fillet weld joint between the thin base plate 1 and the thin vertical plate 2 according to an instruction from the control panel 6 mounted on the welding carriage 7. While generating an arc, fillet welding is performed and the weld beads 8 are formed. A runnable dry ice particle manufacturing apparatus 9 is arranged on or near the floor plate 1, a feed hose 10 for feeding the dry ice particles 14 to a long distance is connected, and a dry ice particle is provided at the tip thereof. A spray nozzle 11 for spraying 14 onto the surface of the floorboard 1 at high speed is attached. A suction hose 12 for collecting excess dry ice particles 14 after spraying the dry ice particles 14 is connected to the dry ice particle manufacturing apparatus 9, and a suction nozzle 13 is attached to the tip thereof.

In such an apparatus, while performing fillet welding for forming the welding bead 8 by the welding torch 4, the dry ice particle manufacturing apparatus 9 sends the dry ice particles 14 to the feeding hose 10, and the spray nozzle 11 at the tip thereof provides high speed. When sprayed on one surface of the floorboard with, the dry ice particles 14 sprayed
Deprives the welding heat on the base plate 1 to sublimate from the solid to the sublimation gas 15, whereby the temperature rise of the base plate 1 is suppressed. Further, at this time, the yield strain generated in the welding process on the floor plate 1 is removed by the high-speed spray impact action of the dry ice particles 14. The sprayed dry ice particles 14 liquefy,
Excessive dry ice particles 14 dropped on the surface of the base plate 1 so that the vicinity of the welded joint is not wetted and the weldability is not impaired.
Is collected from the suction nozzle 13 through the suction hose 12 to the dry ice particle manufacturing apparatus 9, is recycled inside the apparatus, and is sent to the feeding hose 10 again.

Thus, according to this apparatus, by spraying the highly sublimable dry ice particles 14 onto the surface of the floorboard 1 at high speed,
The heat input to the floor plate 1 is suppressed by the cooling effect of the sublimation of the dry ice particles 14, and the yield strain of the floor plate 1 is removed by the blowing impact action, and simultaneously the welding strain is suppressed or removed while performing welding. Work is done.

Although dry ice particles were used as the highly sublimable solid particles in the above-mentioned examples, ice particles may be used.

[Effect of device]

In short, according to the present invention, a welding device for performing arc welding on a welded joint portion of a thin plate to be welded constituting a three-dimensional structure, and a highly sublimable solid particle attached to the welding device at a high speed on the surface of the thin plate to be welded. By providing a means for spraying, the heat input to the thin plate structure can be suppressed and the yield strain can be removed, and the strain can be suppressed or removed during welding, reducing the welding work time, man-hours and welding accuracy. The present invention is extremely useful industrially because a low distortion welding apparatus for a thin plate structure capable of improving the above is obtained.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a low distortion welding apparatus for thin plate structures according to the present invention, FIG. 2 is a perspective view of a conventional welding apparatus for thin plate structures, and FIG. 3 is a front view of the same. 1 ... Floor plate, 2 ... Vertical plate, 3 ... Horizontal plate, 4 ... Welding torch, 5 ...
Wire, 6 ... control panel, 7 ... welding carriage, 8 ... welding bead,
9 ... Dry ice particle manufacturing device, 10 ... Feeding hose, 1
1 ... Spray nozzle, 12 ... Suction hose, 13 ... Suction nozzle, 14 ... Dry ice particles, 15 ... Sublimation gas.

Claims (1)

[Scope of utility model registration request] 1. A welding device for performing arc welding on a welded joint portion of a thin plate to be welded constituting a three-dimensional structure, and a highly sublimable solid particle, which is installed in the welding device, at high speed on the surface of the thin plate to be welded. A low distortion welding apparatus for thin plate structures, characterized by comprising: