Method and device for producing shrink-fitted member

Patent metadata

Field	Value
Publication number	US-11998972-B2
Application number	US-202318151642-A
Country	US
Kind code	B2
Filing date	Jan 9, 2023
Priority date	Mar 25, 2022
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A method for producing a shrink-fitted member by arranging a hollow type pillar shaped ceramic body inside a metal pipe and shrink-fitting them, the hollow type pillar shaped ceramic body including: an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction; and a first end face and a second end face in a direction substantially perpendicular to the axial direction. The method includes arranging the hollow type pillar shaped ceramic body inside the metal pipe while gripping the hollow type pillar shaped ceramic body using a chuck mechanism.

First claim

The invention claimed is:

1. A method for producing a shrink-fitted member by arranging a hollow type pillar shaped ceramic body inside a metal pipe and shrink-fitting them, the hollow type pillar shaped ceramic body comprising: an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction; and a first end face and a second end face in a direction substantially perpendicular to the axial direction,
wherein the method comprises arranging the pillar shaped ceramic body inside the metal pipe while gripping the pillar shaped ceramic body using a chuck mechanism, the chuck mechanism comprising: gripping portions capable of gripping at least a part of the inner peripheral surface of the pillar shaped ceramic body; and protruded portions each having a surface capable of being in contact with at least a part of the first end face of the pillar shaped ceramic body.

2. The method according to claim 1 , wherein the gripping portions are configured such that the gripping portions can be in line contact and/or in surface contact with the inner peripheral surface of the pillar shaped ceramic body.

3. The method according to claim 2 , wherein there are two or more positions that are in line contact.

4. The method according to claim 2 , wherein there are two or more positions that are in surface contact.

5. The method according to claim 1 , wherein an angle formed by each of the gripping portions and each of the protruded portions is substantially the same as an angle formed by the inner peripheral surface and the first end face of the pillar shaped ceramic body.

6. The method according to claim 1 , wherein each of the protruded portion has a suction mechanism, and auxiliary members are arranged on the second end face opposing to the first end face of the pillar shaped ceramic body, the first end face being in contact with the protruded portions, and suction force of the protruded portions helps to grip the pillar shaped ceramic body.

7. The method according to claim 1 , wherein the protruded portions are made of a magnetic material, and auxiliary members are arranged on the second end face opposing to the first end face of the pillar shaped ceramic body, the first end face being in contact with the protruded portions, and magnetic force between the protruded portions and the auxiliary members helps to grip the hollow type pillar shaped ceramic body.

8. The method according to claim 1 , wherein the pillar shaped ceramic body is a honeycomb structure comprising: an outer peripheral wall; an inner peripheral wall; and a partition wall arranged between the outer peripheral wall and the inner peripheral wall, the partition wall defining a plurality of cells each extending from a first end face to a second end face.

9. The method according to claim 1 , wherein the shrink-fitted member is a heat conductive member.

10. A device for producing a shrink-fitted member by arranging a hollow type pillar shaped ceramic body inside a metal pipe and shrink-fitting them, the pillar shaped ceramic body comprising: an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction; and a first end face and a second end face in a direction substantially perpendicular to the axial direction,
wherein the device comprises:
an arm drivable in the axial direction of the metal pipe;
a chuck mechanism provided at a tip of the arm, the chuck mechanism comprising: gripping portions capable of gripping at least a part of the inner peripheral surface of the pillar shaped ceramic body; and protruded portions each having a surface capable of being in contact with at least a part of the first end face of the pillar shaped ceramic body; and
a heating mechanism for heating the metal pipe.

11. The device according to claim 10 , wherein the gripping portions are configured such that the gripping portions can be in line contact and/or in surface contact with the inner peripheral surface of the pillar shaped ceramic body.

12. The device according to claim 11 , wherein there are two or more positions that are in line contact.

13. The device according to claim 11 , wherein there are two or more positions that are in surface contact.

14. The device according to claim 10 , wherein an angle formed by each of the gripping portions and each of the protruded portions is substantially the same as an angle formed by the inner peripheral surface and the first end face of the pillar shaped ceramic body.

15. The device according to claim 10 , wherein each of the protruded portion has a suction mechanism, and auxiliary members are arranged on the second end face opposing to the first end face of the pillar shaped ceramic body, the first end face being in contact with the protruded portions, and suction force of the protruded portions helps to grip the pillar shaped ceramic body.

16. The device according to claim 10 , wherein the protruded portions are made of a magnetic material, and auxiliary members are arranged on the second end face opposing to the first end face of the pillar shaped ceramic body, the first end face being in contact with the protruded portions, and magnetic force between the protruded portions and the auxiliary members helps to grip the hollow type pillar shaped ceramic body.

Assignees

• Ngk Insulators Ltd

Inventors

• Takeuchi Fumitaka
• Kuno Shuhei
• Sawada Seiya

Classifications

• B21D53/06 Primary

  of metal tubes · CPC title

• F28F21/04

  of ceramic; of concrete; of natural stone · CPC title

• F28F21/081

  Heat exchange elements made from metals or metal alloys · CPC title

• F28F2275/00

  Fastening; Joining · CPC title

• B23P11/025 Primary

  by using heat or cold · CPC title