Joint part and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-10393162-B2
Application number	US-201615540739-A
Country	US
Kind code	B2
Filing date	Mar 18, 2016
Priority date	Mar 19, 2015
Publication date	Aug 27, 2019
Grant date	Aug 27, 2019

Abstract

A manufacturing method for a joint part in which a first metal piece and a second metal piece are joined to each other by performing welding by irradiating a high-energy beam to a joint surface on which the first metal piece and the second metal piece face each other, the first metal piece including a first flow path for passage of a fluid provided at a specific depth from a surface on a side exposed to the high-energy beam, the second metal piece including a second flow path for passage of the fluid provided at a specific depth from the surface on the side exposed to the high-energy beam, and the first flow path and the second flow path being coupled to each other on the joint surface.

First claim

The invention claimed is:

1. A manufacturing method for a joint part in which a first metal piece and a second metal piece are joined to each other by performing welding by irradiating a high-energy beam to a joint surface on which the first metal piece and the second metal piece face each other, the first metal piece including a first flow path for passage of a fluid provided at a specific depth from a surface on a side exposed to the high-energy beam, the second metal piece including a second flow path for passage of the fluid provided at a specific depth from the surface on the side exposed to the high-energy beam, and the first flow path and the second flow path being coupled to each other on the joint surface, the manufacturing method comprising:
performing a first welding in which welding is performed at a fusing depth that does not reach a coupling between the first flow path and the second flow path in a first range of the joint surface, the first range including a specific portion that overlaps the coupling as seen from the surface side that is exposed to the high-energy beam; and
performing a second welding in which welding is performed at a fusing depth that is larger than the fusing depth of the first welding in a second range of the joint surface, the second range excluding the specific portion.

2. The manufacturing method for a joint part according to claim 1 , wherein
the second welding is performed after the first welding is performed.

3. The manufacturing method for a joint part according to claim 2 , wherein
the first range is an entire range of the joint surface as seen from the surface side that is exposed to the high-energy beam.

4. The manufacturing method for a joint part according to claim 3 , wherein
the first metal piece is an outer metal piece that has a through hole, and the second metal piece is an inner metal piece fitted into the through hole, and
the joint surface is formed by an inner peripheral surface of the through hole and an outer peripheral surface of the inner metal piece.

5. The manufacturing method for a joint part according to claim 3 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

6. The manufacturing method for a joint part according to claim 2 , wherein
the first metal piece is an outer metal piece that has a through hole, and the second metal piece is an inner metal piece fitted into the through hole, and
the joint surface is formed by an inner peripheral surface of the through hole and an outer peripheral surface of the inner metal piece.

7. The manufacturing method for a joint part according to claim 6 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

8. The manufacturing method for a joint part according to claim 2 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

9. The manufacturing method for a joint part according to claim 1 , wherein
the first welding is performed after the second welding is performed.

10. The manufacturing method for a joint part according to claim 9 , wherein
the first range is an entire range of the joint surface as seen from the surface side that is exposed to the high-energy beam.

11. The manufacturing method for a joint part according to claim 10 , wherein
the first metal piece is an outer metal piece that has a through hole, and the second metal piece is an inner metal piece fitted into the through hole, and
the joint surface is formed by an inner peripheral surface of the through hole and an outer peripheral surface of the inner metal piece.

12. The manufacturing method for a joint part according to claim 10 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

13. The manufacturing method for a joint part according to claim 9 , wherein
the first metal piece is an outer metal piece that has a through hole, and the second metal piece is an inner metal piece fitted into the through hole, and
the joint surface is formed by an inner peripheral surface of the through hole and an outer peripheral surface of the inner metal piece.

14. The manufacturing method for a joint part according to claim 13 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

15. The manufacturing method for a joint part according to claim 9 , wherein
the specific portion is formed at a plurality of locations on the joint surface as seen from the surface side that is exposed to the high-energy beam, and
the second welding is performed through continuous reciprocation of a position of irradiation of the high-energy beam between two adjacent specific portions alternately in a first direction from one of the specific portions toward the other specific portion along the joint surface and a second direction that is opposite to the first direction.

16. A joint part comprising;
a first metal piece; and
a second metal piece joined to the first metal piece on a joint surface on which the first metal piece and the second metal piece face each other, wherein:
the first metal piece includes a first flow path for passage of a fluid provided at a specific depth from a specific surface, the second metal piece includes a second flow path for passage of the fluid provided at a specific depth from the specific surface, and the first flow path and the second flow path are coupled to each other on the joint surface;
a small bead portion with a fusing depth that does not reac

Assignees

• Aisin Aw Co

Inventors

• Iwama Takashi
• Ono Hiroyuki
• Torii Takeshi
• Nakashima Keisuke
• Miyamoto Yusuke
• Aoyama Tetsuya

Classifications

• F16D13/60

  Clutching elements (friction lining or attachment thereof F16D69/00) · CPC title

• B23K26/28

  of curved planar seams · CPC title

• B23K15/04

  for welding annular seams · CPC title

• B23K15/00

  Electron-beam welding or cutting · CPC title

• F16D25/0638

  with more than two discs, e.g. multiple lamellae · CPC title