JP2007083282A - Welding equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding equipment capable of reducing scattering of spatter particles, reducing the working of removing spatter later, and preventing damages of a periphery by spatter. <P>SOLUTION: In the welding equipment 1 for performing the welding by melting a fore-end of a welding rod 3 by the arc heat generated by the arc discharge between a base metal 2 and the welding rod 3, a spiral gas flow is generated around the welding rod to shield the scattering of the spatter caused by the welding rod by the spiral gas flow. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a welding apparatus, and more particularly to a welding apparatus that performs arc welding in which a weld metal is melted by heat generated by arc discharge.

  Conventionally, it is well known to perform welding as a method of joining metals together.

  For example, in the MAG (Metal Active Gas) welding method, which is a type of arc welding, the adherend metal member to be joined and the base metal member are used as a base material, and a predetermined voltage is applied between the base material and the welding rod. When applied, an arc is generated and the welding rod is melted by the arc heat to form a weld metal, which is welded to the base metal, and during this welding, a shielding gas is flowed around the welding rod. The weld metal is shielded with a shielding gas to prevent the weld metal from being adversely affected by the atmosphere.

  For example, Patent Document 1 discloses a basic configuration of a welding apparatus using the above shielding gas.

JP 2004-261828 A

  By the way, in the welding apparatus that performs welding by applying a voltage between the base material and the welding rod as described above to melt the welding rod, the molten pieces of the welding rod are scattered as sputtered particles, There was a problem that spatter was attached to places that should not be followed.

  In the case where the spatter is attached in this way, there is a problem that a process of peeling off the sputter later is required, which is a laborious work. In addition, there is a problem that if the spatter is applied to a place that should not be attached to the periphery, that part is damaged.

  The present invention has been made in view of the above points, and provides a welding apparatus that can reduce the scattering of sputtered particles, reduce the work of peeling off the spatter later, and damage the periphery by spattering. For the purpose.

  In order to solve the above-described problems, the present invention provides a welding apparatus for performing arc welding in which a tip portion of the welding rod is melted and welded by arc heat generated by arc discharge between a base material and the welding rod. A spiral gas flow is generated around the substrate, and spatter scattering by the welding rod is shielded by the spiral gas flow.

  Further, the present invention provides a welding apparatus for performing arc welding in which a tip portion of the welding rod is melted and welded by arc heat generated by arc discharge between a base material and a welding rod, the welding rod is tubular, A gas is supplied into the tube of the welding rod, and a tip portion of the welding rod which is melted by the arc heat is cooled by the gas supplied into the tube of the welding rod.

    Further, the present invention provides a welding apparatus for performing arc welding in which a tip portion of the welding rod is melted and welded by arc heat generated by arc discharge between a base material and the welding rod. A suction means for sucking spatter from the welding rod is provided.

  According to the present invention, it is possible to provide a welding apparatus that can reduce the scattering of sputtered particles and reduce the work of peeling off spatter later.

  That is, according to the present invention, spattering of sputtered particles can be reduced by the gas flow rotating in a spiral shape.

  Further, according to the present invention, since the cooling gas is supplied to the tubular welding rod, excessive overheating due to arc heat at the tip of the welding rod is prevented, excessive melting is suppressed, and the spattered particles that are scattered are scattered. Occurrence can be suppressed.

  According to the present invention, since spatter is sucked around the welding rod, spattering of sputtered particles can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic perspective view showing a configuration of a welding apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the welding apparatus 1 of the present embodiment is configured by applying a voltage by a power supply device 4 between a grounded base material 2 to be welded and a welding rod 3. As the welding rod 3, for example, a conventionally known solid wire or flux-containing solid wire is used. As the base material 2, in addition to mild steel, high-tensile steel, low alloy steel, stainless steel, various metal materials such as aluminum, aluminum alloy, copper, copper alloy, nickel, nickel alloy, heat resistant steel can be applied. it can.

  A support cylinder 5 that supports the welding rod 3 is provided around the welding rod 3. The support cylinder 5 is made of an insulator, such as an insulator.

  Further, a support member 6 that forms a space through which gas passes between the support cylinder 5 and the support cylinder 5 is provided outside the support cylinder 5.

  A gas from the gas supply device 9 is injected between the support cylinder 5 and the support member 6 from the gas injection ports 7 and 8. The type of this gas may be an active gas such as carbon dioxide or oxygen conventionally used in the MAG welding method, or an inert gas such as argon or helium used in the MIG (Metal Inert Gas) welding method. The mixed gas may be used. This gas prevents the molten welding rod 3 from being adversely affected by the atmosphere.

  The gas from the gas supply device 9 travels while spirally rotating between the support cylinder 5 and the support member 6, and is ejected from the lower tip shown in FIG. The traveling path of the spirally rotating gas is based on the angle at which the gas inlets 7 and 8 are attached to the support member 6 and the direction of the hole of the support member 6 at the position where the gas inlets 7 and 8 are attached to the support member 6. Can be formed.

  FIG. 2 is a plan view of the welding apparatus 1 shown in FIG. 1 viewed from the direction A in FIG.

  FIG. 3 is a side sectional view of the welding apparatus 1 shown in FIG.

  In the present embodiment, as shown in FIG. 2, the gas injection ports 7 and 8 are such that the gas injected from the gas injection ports 7 and 8 rotates around the support cylinder 5 in the direction indicated by the dashed arrow. The mounting angle to the support member 6 and the direction of the hole of the support member 6 are determined.

  Further, as shown in FIG. 3, the gas injection ports 7 and 8 are arranged so that the gas injected from the gas injection ports 7 and 8 advances downward while spirally rotating around the support cylinder 5 in the direction indicated by the arrow. The angle of attachment to the support member 6 and the direction of the hole of the support member 6 are determined.

  In the welding apparatus 1 of the present embodiment, when voltage application is started between the base material 2 and the welding rod 3 by the power supply device 4, the tip 3 a of the welding electrode 3 directed toward the base material 2 side and the base material 2. Arc discharge occurs between the two and the tip 3a is melted by the arc heat, and the molten piece jumps toward the base material 2 and is welded. At this time, gas is injected from the gas supply device 9 through the gas injection ports 7 and 8, and this gas is ejected from below while rotating in a spiral shape.

  As the welding progresses, the welding rod 3 melts and decreases from below, so that the welding rod 3 is gradually inserted into the support cylinder 5 from above to supplement it.

  At the time of this welding, electrons in the vicinity of the welding rod 3 generated by arc discharge are attached to the sputtered particles that have been scattered in the past, thereby giving a negative charge. The discharge current generated by the arc discharge forms a strong magnetic field around the current, and the negatively charged sputtered particles are applied with a force toward the center of the arc discharge by the Lorentz force.

  Moreover, in the welding apparatus 1 of this Embodiment, as shown in FIGS. 1-3, gas is inject | poured from the gas injection ports 7 and 8 so that it may rotate helically. This rotation of the gas also serves to shield the sputtered particles from being scattered from the outer diameter of the support cylinder 5.

  Further, since the gas rotates in a spiral shape, the sputtered particles are also rotated, and the force that the sputtered particles are scattered to the outside in the radial direction of the support cylinder 5 can be weakened.

  According to the present embodiment, spattering of sputtered particles can be reduced by the gas flow rotating in a spiral shape.

  Next, another embodiment of the present invention will be described with reference to FIG.

  FIG. 4 is a side sectional view of a welding apparatus 10 according to an embodiment different from FIG.

  The welding device 10 is configured by applying a voltage by a power supply device 14 between a grounded base material 12 to be welded and a welding rod 13. In addition, the material of each part, the kind of gas, etc. are the same as that of embodiment shown in FIG.

  This embodiment is an example in which a thick welding rod is used for the purpose of welding a wide range, for example. If the welding rod is thick, the surface area exposed to arc heat increases, and the amount of spatter that the welding rod melts and scatters more than necessary may increase.

  Therefore, in the present embodiment, the welding rod 13 is formed in a tubular shape, and gas is passed therethrough, thereby cooling the tip portion 13a of the welding rod 13 so that the welding rod 13 is not melted more than necessary.

  A support cylinder 15 that supports the welding rod 13 is provided around the welding rod 13. A support member 16 that forms a space through which gas passes between the support cylinder 15 and the support cylinder 15 is provided outside the support cylinder 15.

  A gas from the gas supply device 19 is injected between the support cylinder 15 and the support member 16 from the gas injection ports 17 and 18. In the present embodiment, the gas from the gas supply device 19 is supplied to the central portion of the tubular welding rod 13 through the gas inlet 20.

  Also in the present embodiment, the gas from the gas supply device 19 travels while spirally rotating between the support cylinder 15 and the support member 16, and is ejected from the lower tip shown in FIG. Plays a role in preventing scattering. Further, the gas supplied from the gas injection port 20 is ejected from the other end of the welding rod 13 to prevent excessive overheating due to arc heat at the tip end portion 13a, to suppress excessive melting, and to suppress generation of scattered sputter particles. Can do.

  Next, still another embodiment according to the present invention will be described with reference to FIG.

  FIG. 5 is a side sectional view of a welding apparatus 31 according to another embodiment different from those shown in FIGS. 1 and 4.

  The welding device 31 is configured by applying a voltage by a power supply device 34 between a grounded base material 32 to be welded and a welding rod 33. In addition, the material of each part, the kind of gas, etc. are the same as that of embodiment shown in FIG.

  In this embodiment, means for sucking the spatter is provided in order to prevent the spatter from scattering.

  A support cylinder 35 that supports the welding rod 33 is provided around the welding rod 33. A support member 36 that forms a space through which gas (gas supplied from the gas supply device 39) passes is provided between the support cylinder 35 and the support cylinder 35. Outside the support member 36, a support member 40 is provided between the support member 36 and a space through which gas (gas supplied from the gas supply device 39 and surrounding air) and spatter pass.

  A gas from the gas supply device 39 is injected between the support cylinder 35 and the support member 36 from the gas injection ports 37 and 38. The distal end portion of the support member 36 is narrowed so that the distal end is narrowed, whereby the gas supplied from the gas supply device 39 is made into a gas jet and directed toward the center of the distal end of the welding rod 33. . Spatters generated during welding are weakened by this gas jet.

  Between the support member 36 and the support member 40, suction of gas and spatter is performed by the suction device 43 through the gas suction ports 41 and 42. The spatter, whose momentum scattered by the gas supplied from the gas supply device 39 is weakened, is sucked and discharged together with the gas from between the support member 36 and the support member 40. A powerful suction pump may be used as the suction device 43.

  In the embodiment shown in FIGS. 1 and 4, the gas is supplied in a spiral shape. However, in this embodiment, the gas from the gas supply device 39 may be supplied in a spiral shape or may not be in a spiral shape. It may be straight.

  Further, in the embodiment shown in FIG. 5, the shape of the welding rod may be annular as in the embodiment shown in FIG. 4, and gas may be supplied into the pipe.

It is a schematic perspective view which shows the structure of the welding apparatus by one embodiment of this invention. It is the top view which looked at the welding apparatus 1 shown in FIG. 1 from the direction A of FIG. It is a sectional side view of the welding apparatus 1 shown in FIG. It is a sectional side view of the welding apparatus 10 of embodiment different from FIG. It is a sectional side view of the welding apparatus 31 of embodiment different from FIG.1 and FIG.4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding device 2 Base material 3 Welding rod 4 Power supply device 5 Support cylinder 6 Support member 7, 8 Gas inlet 9 Gas supply device

Claims (3)

In a welding apparatus for performing arc welding in which the tip of the welding rod is melted and welded by arc heat generated by arc discharge between the base material and the welding rod,
A welding apparatus that generates a spiral gas flow around the welding rod and shields spatter from the welding rod by the spiral gas flow. In a welding apparatus for performing arc welding in which the tip of the welding rod is melted and welded by arc heat generated by arc discharge between the base material and the welding rod,
The welding rod is tubular, and gas is supplied into the pipe of the welding rod,
The welding apparatus characterized by cooling the front-end | tip part of the said welding rod fuse | melted by the said arc heat with the gas supplied in the pipe | tube of the said welding rod. In a welding apparatus for performing arc welding in which the tip of the welding rod is melted and welded by arc heat generated by arc discharge between the base material and the welding rod,
A welding apparatus comprising suction means for sucking spatter from the welding rod around the welding rod.

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