Junction structure

Patent metadata

Field	Value
Publication number	US-11525469-B2
Application number	US-201716318422-A
Country	US
Kind code	B2
Filing date	Aug 3, 2017
Priority date	Aug 9, 2016
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A junction structure includes a first metallic material, a second material different in type from the first metallic material, and a welding wire as a third material similar to the first metallic material. The second material is stacked on the first material. The molten metal of the third metallic material is deposited by arc welding into the through part of the second material so as to form a flanged or tapered bead, so that the first and third metallic materials and the second material are fixed together.

First claim

The invention claimed is:

1. A junction structure comprising:
a first metallic material;
at least one type of different material having a through part, the different material being different in type from the first metallic material, being difficult to be welded to the first metallic material, and being stacked on the first metallic material; and
a molten welding wire comprising a metallic material similar to the first metallic material, the molten welding wire being bonded to the first metallic material by arc welding through the through part along thickness of the first metallic material, the molten welding wire being deposited into the through part of the different material, and the molten welding wire being deposited, to form a flange portion, onto a region which is on an upper surface of the different material and surrounds the through part,
wherein
the different material and the first metallic material are fixed together by a compressive force between the flange portion and the first metallic material, the compressive force being generated when the molten welding wire is solidified and shrunk onto the first metallic material, and
when the different material has a lower melting point than the first metallic material, the different material has a larger thickness than the first metallic material, and
wherein
the different material has a recess containing the through part to be joined to the first metallic material, and
the recess comprises a first tubular shape and the through part comprises a second tubular shape, the first tubular shape and the second tubular shape being different.

2. The junction structure according to claim 1 , wherein
the different material is stacked on the first metallic material with the recess facing up and is fixed to the first metallic material such that the flange portion is entirely in the recess.

3. The junction structure according to claim 1 , wherein
the first metallic material has a protruding junction,
the different material has the recess larger than the protruding junction of the first metallic material,
the protruding junction of the first metallic material is in the recess of the different material,
the through part is smaller in diameter than a top of the protruding junction, and
the molten welding wire is fixedly joined to a middle part of an upper surface of the protruding junction of the first metallic material through the through part of the different material.

4. A junction structure comprising:
a first metallic material;
at least one type of different material having a through part, the different material being different in type from the first metallic material, being difficult to be welded to the first metallic material, and being stacked on the first metallic material; and
a molten welding wire bonded to the first metallic material by arc welding through the through part along thickness of the first metallic material, the molten welding wire being deposited into the through part of the different material, and the molten welding wire being deposited onto a region which is on an upper surface of the different material and surrounds the through part,
wherein the different material and the first metallic material are fixed together by a welding process including a plurality of steps each having a different welding method or a different welding condition such that the molten welding wire is fixed to the region surrounding the through part,
wherein
the different material has a recess containing the through part to be joined to the first metallic material, and
the recess comprises a first tubular shape and the through part comprises a second tubular shape, the first tubular shape and the second tubular shape being different.

5. The junction structure according to claim 4 , wherein the plurality of steps comprises:
a first step of depositing the molten welding wire into the through part of the different material by short-circuit welding in which a short-circuit state and an arc state are alternately repeated; and
a second step of depositing the molten welding wire onto the region which is on the upper surface of the different material and surrounds the through part either by pulse welding with a wider arc than in the short-circuit welding performed in the first step or by short-circuit welding forming a spiral welding trajectory.

6. The junction structure according to claim 4 , wherein switching between a first step of depositing the molten welding wire into the through part of the different material and a second step of depositing the molten welding wire onto a region which is on an upper surface of the different material and surrounds the through part can be performed either by:
while an arc is maintained, or
after the arc is turned off and then turned on again.

7. The junction structure according to claim 1 , wherein
when the different material is resin, arc welding is performed on the region on the upper surface of the different material either by alternating-current welding with a low heat input or by short-circuit welding forming a spiral welding trajectory, and
the molten welding wire weldable to the first metallic material is deposited onto the region on the upper surface of the different material during arc welding, so that a direct heat input can melt the region on the upper surface of the different material, allowing the molten welding wire to intrude into and to be firmly fixed on the region on the upper surface of the different material so as to engage each other.

8. The junction structure according to claim 1 , wherein the arc welding is one of following:
arc welding with a consumable electrode,
tungsten inert gas welding with a non-consumable electrode, and
plasma welding with a non-consumable electrode.

9. A junction structure comprising:
a first metallic material;
at least one type of different material having a tapered through part, the different material being different in type from the first metallic material, being difficult to be welded to the first metallic material, and being stacked on the first metallic material; and
a molten welding wire bonded to the first metallic material by arc welding through the through part along thickness of the first metallic material, and the molten welding wire being deposited into the through part of the different material so as to form a flanged or tapered bead, so that the different material and the first metallic material are fixed together,
wherein
the different material has a recess containing the through part to be joined to the first metallic material, and
the recess comprises a first tubular shape and the through part comprises a second tubular shape, the first tubular shape and the second tubular shape being different.

10. The junction structure according to claim 1 , wherein the first tubular shape is larger in size than the second tubular shape.

11. The junction structure according to claim 4 , wherein the first tubular shape is larger in size than the second tubular shape.

12. The junction structure according to claim 9 , wherein the first tubular shape is larger in size than the second tubular shape.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Fujiwara Junji
• Kawamoto Atsuhiro

Classifications

• B23K33/00

  Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby · CPC title

• B29C66/43

  Joining a relatively small portion of the surface of said articles (B29C66/45 takes precedence) · CPC title

• B29C66/73521

  of different thickness, i.e. the thickness of one of the parts to be joined being different from the thickness of the other part · CPC title

• F16B5/08 Primary

  by means of welds or the like (welding B23K) · CPC title

• B23K9/232

  of different metals · CPC title