Fastening method for a bushing

• US 10,449,623 B2
• Filed: 08/19/2016
• Issued: 10/22/2019
• Est. Priority Date: 08/21/2015
• Status: Active Grant

• Current Assignee: Eberspacher Exhaust Technology GmbH & Co. KG (Eberspächer Gruppe GmbH & Co. KG)
• Original Assignee: Eberspacher Exhaust Technology GmbH & Co. KG (Eberspächer Gruppe GmbH & Co. KG)
• Inventors: Gerlich, Harald
• Primary Examiner(s): Masinick, Jonathan P
• Application Number:
  US15/241,616
• Publication Number:
  US 20170050260A1
• Time in Patent Office: 1,159 Days
• CPC Class Codes: B23K 11/02 Pressure butt welding
• CPC Class Codes: B23K 11/093 for curved planar seams
• CPC Class Codes: B23K 11/34 Preliminary treatment
• CPC Class Codes: B23K 2101/006 Vehicles
• CPC Class Codes: F01N 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 13/1844 Mechanical joints
• CPC Class Codes: F01N 2450/22 by welding or brazing
• CPC Class Codes: F16B 37/061 by means of welding

Abstract

A method for fastening a metallic bushing (3) to a metallic component (2) includes forming a ring-shaped contact surface (5) on the bushing, forming an opening (6) in the component and providing a collar (7) extending circumferentially along the opening in the component and projecting on a mounting side (8) of the component. The mounting side is brought into contact and pressed in the area of the opening in the component such that the contact surface touches the collar. The bushing (3) is pressed on the mounting side (8) of the component in the area of the opening (6), so that the contact surface is in contact with the collar under prestress. With the contact surface (5) in contact with the collar under prestress, the bushing (3) and the component (2) are resistance welded together in the area of the contact between the contact surface (5) and the collar (7).

Claims

1. A method for fastening a metallic bushing on a metallic component, the method comprising the steps of:

forming a ring-shaped contact surface on the bushing;

forming an opening on the component;

forming a collar on the component, which extends circumferentially and projects on a mounting side of the component;

pressing the bushing on the mounting side of the component in the area of the opening such that the contact surface touches the collar;

pressing the bushing against the component so that the contact surface is in contact with the collar under prestress; and

resistance welding the contact surface, with the contact surface in contact with the collar under prestress, to weld the bushing and the component together in an area of contact between the contact surface and the collar.

2. A method in accordance with claim 1, wherein the contact surface is flat.

3. A method in accordance with claim 1, wherein the contact surface is conical.

4. A method in accordance with claim 1, wherein:

the bushing has a through hole which adjoins the opening in the component in the welded-on state and defines a central longitudinal axis of the bushing; and

the bushing has a coupling area which adjoins the contact surface on a side facing away from the component and is used to attach an add-on piece.

5. A method in accordance with claim 4, wherein:

a circular path, along which the contact surface extends in a ring-shaped pattern, is located in a circumferential plane; and

the central longitudinal axis extends at right angles to the circumferential plane.

6. A method in accordance with claim 4, wherein:

a circular path, along which the contact surface extends in a ring-shaped pattern, is located in a circumferential plane; and

the central longitudinal axis is sloped in relation to the circumferential plane in an angle range of 15°

to 75°

.

7. A method in accordance with claim 1, wherein a self-supporting edge of the collar is rounded before bringing the bushing into contact.

8. A method in accordance with claim 1, wherein before bringing the bushing into contact such that the contact surface touches the collar, a self-supporting edge of the collar is formed with a circumferential collar surface, which is defined by an outer edge, which is a distal edge in relation to the opening in the component, and by an inner edge, which is a proximal edge in relation to the opening in the component.

9. A method in accordance with claim 8, wherein the collar surface is flat.

10. A method in accordance with claim 8, wherein the collar surface is conical.

11. A method in accordance with claim 1, wherein the collar is cylindrical.

12. A method in accordance with claim 1, wherein the collar is conical.

13. A method in accordance with claim 1, wherein the bushing has a ring-shaped projection, which is bordered by the contact surface and enters the opening in the component when the bushing is being brought into contact such that the contact surface touches the collar.

14. A method in accordance with claim 13, wherein the projection has a peripheral, ring-shaped circumferential surface, which faces the contact surface and is cylindrical.

15. A method in accordance with claim 13, wherein the projection has a peripheral circumferential surface, which faces the contact surface and is conical.

16. A method in accordance with claim 1, wherein:

the collar is conical;

a self-supporting edge of the collar has an outer edge, which is a distal edge in relation to the opening in the component, and an inner edge, which is a proximal edge in relation to the opening in the component;

the bushing has a ring-shaped projection, which is bordered by the contact surface and which enters the opening in the component when the bushing is being brought into contact;

the projection has a peripheral circumferential surface, which faces the contact surface;

the circumferential surface is cylindrical;

the contact surface is flat; and

the bushing is pressed on such that the outer edge is in contact with the contact surface and the inner edge is in contact with the circumferential surface.

17. A method for fastening a metallic bushing on a metallic component, the method comprising the steps of:

forming a ring-shaped contact surface on the bushing;

forming an opening on the component;

forming a collar on the component, which extends circumferentially and projects on a mounting side of the component;

pressing the bushing on the mounting side of the component in the area of the opening such that the contact surface touches the collar;

pressing the bushing against the component such that the collar yields by elastically deforming or elastically and plastically deforming at least in some locations along the collar so that the contact surface is in contact with the collar under prestress with the contact surface; and

resistance welding the contact surface, with the contact surface in contact with the collar under prestress, to weld the bushing and the component together in an area of contact between the contact surface and the collar.

18. An exhaust system component comprising:

a metallic component formed with an opening; and

a metallic bushing formed with a ring-shaped contact surface on the bushing, the metallic bushing being fastened to the metallic component by the steps of;

forming a collar on the component, which extends circumferentially and projects on a mounting side of the component;

pressing the bushing on the mounting side of the component in the area of the opening such that the contact surface touches the collar;

pressing the bushing against the component so that the contact surface is in contact with the collar under prestress; and

resistance welding the contact surface, with the contact surface in contact with the collar under prestress, to weld the bushing and the component together in an area of contact between the contact surface and the collar.

19. An exhaust system component in accordance with claim 18, wherein:

the bushing has a through hole which adjoins the opening in the component in the welded-on state and defines a central longitudinal axis of the bushing;

the bushing has a coupling area which adjoins the contact surface on a side facing away from the component and is used to attach an add-on piece; and

the contact surface is flat.

20. An exhaust system component in accordance with claim 18,

the bushing has a through hole which adjoins the opening in the component in the welded-on state and defines a central longitudinal axis of the bushing;

the bushing has a coupling area which adjoins the contact surface on a side facing away from the component and is used to attach an add-on piece; and

the contact surface is conical.