Method for joining members and joined body

Patent metadata

Field	Value
Publication number	US-11110874-B2
Application number	US-201816488555-A
Country	US
Kind code	B2
Filing date	Mar 13, 2018
Priority date	Mar 17, 2017
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A method for joining members according to an embodiment of the present invention includes: providing a bumper stay including two integrated pipe portions extending in an identical direction, the bumper stay including a recess provided between the pipe portions being adjacent to each other, the recess extending in a longitudinal direction of the pipe portions from end surfaces of the pipe portions, a part of the recess serving as a locking portion, and a bumper beam including a rear inclined wall formed with two hole portions into which the pipe portions of the bumper stay are insertable respectively; inserting the bumper stay into the hole portions of the bumper beam until the locking portion abuts on the rear inclined wall; and pipe-expanding an insertion portion of the bumper stay into the bumper beam to join the insertion portion to the bumper beam by press-fitting.

First claim

The invention claimed is:

1. A method for joining members, the method comprising:
providing
a first member including at least two pipe portions extending in an identical direction and integrated, the first member including a recess provided between two adjacent pipe portions of the at least two pipe portions, the recess extending in a longitudinal direction of the at least two pipe portions from end surfaces of the at least two pipe portions, a part of the recess serving as a locking portion, and
a second member including a locking wall formed with at least two hole portions into which the at least two pipe portions of the first member are insertable respectively;

inserting the at least two pipe portions of the first member into the at least two hole portions of the second member until the locking portion abuts on the locking wall; and
pipe-expanding an insertion portion of the at least two pipe portions of the first member inserted into the second member to join the insertion portion to the second member by press-fitting.

2. The method for joining members according to claim 1 , wherein the first member penetrates the second member.

3. The method for joining members according to claim 1 , further comprising:
providing an elastic body insertable into the at least two pipe portions of the first member;
inserting the elastic body into the at least two pipe portions of the first member; and
compressing the elastic body in a longitudinal direction of the at least two pipe portions of the first member to expand the elastic body radially outward of the at least two pipe portions, thereby pipe-expanding the first member.

4. The method for joining members according to claim 1 , wherein
the second member is pipe-shaped and has a partition wall partitioning an inside of the second member, and
the at least two pipe portions of the first member are inserted into the at least two hole portions of the second member so that the partition wall is disposed in the recess.

5. The method for joining members according to claim 1 , wherein
the recess is formed by:
end portions of the two adjacent pipe portions of the first member; and
two connection walls connecting the two adjacent pipe portions of the first member, the two connection walls orthogonal to the locking wall, and

the locking portion is a part of the connection wall.

6. The method for joining members according to claim 1 , wherein
the recess is formed by:
end portions of the two adjacent pipe portions of the first member; and
one connection wall connecting the two adjacent pipe portions of the first member, the one connection wall orthogonal to the locking wall, and

the locking portion is a part of the connection wall.

7. The method for joining members according to claim 1 , wherein
the recess is formed by a cutout portion obtained by cutting out an end portion of one of the at least two pipe portions of the first member, and
the locking portion is a part of the cutout portion.

8. The method for joining members according to claim 1 , wherein the first member is a bumper stay of a vehicle, and the second member is a bumper beam of a vehicle.

9. The method for joining members according to claim 1 , wherein the hole portion of the second member is burring-machined.

10. A joined body comprising:
a first member including at least two pipe portions extending in an identical direction and integrated, the first member including a recess between two adjacent pipe portions of the at least two pipe portions, the recess extending in a longitudinal direction of the at least two pipe portions from end surfaces of the at least two pipe portions, a part of the recess serving as a locking portion; and
a second member including a locking wall formed with at least two hole portions into which the at least two pipe portions of the first member is insertable,
the joined body being formed by joining the first member and the second member,
wherein
the at least two pipe portions of the first member are inserted into the at least two hole portions of the second member, and the locking portion abuts on the locking wall of the second member, and
an insertion portion inserted into the second member is joined to the second member in a state where the insertion portion is pipe-expanded.

11. The method for joining members according to claim 2 , further comprising:
providing an elastic body insertable into the at least two pipe portions of the first member;
inserting the elastic body into the at least two pipe portions of the first member; and
compressing the elastic body in a longitudinal direction of the at least two pipe portions of the first member to expand the elastic body radially outward of the at least two pipe portions, thereby pipe-expanding the first member.

12. The method for joining members according to claim 2 , wherein
the second member is pipe-shaped and has a partition wall partitioning an inside of the second member, and
the at least two pipe portions of the first member are inserted into the at least two hole portions of the second member so that the partition wall is disposed in the recess.

13. The method for joining members according to claim 2 , wherein
the recess is formed by:
end portions of the two adjacent pipe portions of the first member; and
two connection walls connecting the two adjacent pipe portions of the first member, the two connection walls orthogonal to the locking wall, and

the locking portion is a part of the connection wall.

14. The method for joining members according to claim 2 , wherein
the recess is formed by:
end portions of the two adjacent pipe portions of the first member; and
one connection wall connecting the two adjacent pipe portions of the first member, the one connection wall orthogonal to the locking wall, and

the locking portion is a part of the connection wall.

15. The method for joining members according to claim 2 , wherein
the recess is formed by a cutout portion obtained by cutting out an end portion of one of the at least two pipe portions of the first member, and
the locking portion is a part of the cutout portion.

16. The method for joining members according to claim 2 , wherein the hole portion of the second member is burring-machined.

Assignees

• Kobe Steel Ltd

Inventors

• Maeda Yasuhiro
• Hashimura Toru
• Watanabe Kenichi
• Yukishige Ryohei
• Yamakawa Taiki

Classifications

• B21D39/06

  of tubes in openings, e.g. rolling-in · CPC title

• B60R2019/242

  on two vertical sleeves, e.g. on energy absorber ends · CPC title

• B21D39/206

  by axially compressing the elastic material · CPC title

• B60R19/30

  Elastomeric material {(B60R19/34 takes precedence)} · CPC title

• B60R19/03 Primary

  characterised by material, e.g. composite (B60R19/18 takes precedence) · CPC title