Linear friction welder with rocker arms

• US 8,181,841 B2
• Filed: 10/28/2011
• Issued: 05/22/2012
• Est. Priority Date: 08/25/2010
• Status: Active Grant

• Current Assignee: US Bank National Association (US Bancorp)
• Original Assignee: APCI, LLC
• Inventors: Johnson, Stephen A., Gorski, Thaddeus W.
• Primary Examiner(s): Stoner, Kiley
• Application Number:
  US13/284,158
• Publication Number:
  US 20120048477A1
• Time in Patent Office: 207 Days
• Field of Search: None
• US Class Current: 228/2.1
• CPC Class Codes: B23K 20/1205 using translation movement

Abstract

A linear friction welding system in one embodiment includes a ram configured to vibrate along a welding axis, at least one rocker arm with a first end portion spaced apart from the welding axis and constrained against movement along the welding axis, and a second end portion which is movable along the welding axis, and a first welding component support member configured to hold a first welding component, the first welding component support member operably connected to the ram and supported by the second end portion of the at least one rocker arm, such that vibration of the ram along the welding axis causes the location of the first welding component support member along an axis orthogonal to the welding axis to vary.

Claims

1. A linear friction welding system comprising:

a ram configured to vibrate along a welding axis;

at least one rocker arm with a first end portion spaced apart from the welding axis and constrained against movement along the welding axis, and a second end portion which is movable along the welding axis; and

a first welding component support member configured to hold a first welding component, the first welding component support member operably connected to the ram and supported by the second end portion of the at least one rocker arm, such that vibration of the ram along the welding axis causes the location of the first welding component support member along an axis orthogonal to the welding axis to vary.

2. The linear friction welding system of claim 1, wherein the axis orthogonal to the welding axis is a press axis defined by a press assembly.

3. The linear friction welding system of claim 2, wherein:

the first end portion is pivotably connected to the base by a first pivot; and

the second end portion is pivotably connected to the first welding component support member by a second pivot.

4. The linear friction welding system of claim 3, wherein the first welding component support member is pivotably connected to the ram by a third pivot.

5. The linear friction welding system of claim 2, further comprising:

a second welding component support member configured to hold a second welding component, the second welding component support member movable along the press axis by the press assembly.

6. The linear friction welding system of claim 5, wherein:

the first welding component support member is configured to hold the first welding component at a location beneath the welding axis; and

the second welding component support member is configured to hold the second welding component at a location beneath the welding axis.

7. The linear friction welding system of claim 6, wherein the first welding component support member comprises a carriage suspended from the at least one rocker arm.

8. The linear friction welding system of claim 7, wherein the at least one rocker arm comprises:

a first rocker arm pair pivotably connected to the carriage; and

a second rocker arm pair pivotably connected to the carriage.

9. A linear friction welding system comprising:

a ram configured to vibrate along a horizontal welding axis;

a base assembly;

at least one rocker arm supported by the base assembly and extending downwardly from the base assembly;

a press assembly defining a vertical press axis; and

a carriage configurable to hold a first welding component, the carriage operably connected to the ram and supported by the at least one rocker arm, such that vibration of the ram along the welding axis causes the carriage to move along the press axis and to move along the welding axis.

10. The linear friction welding system of claim 9, wherein:

the ram includes a first end portion;

a second end portion of the carriage is located proximate to the first end portion;

a third end portion of the carriage is located distally from the first end portion; and

the at least one rocker arm comprises a first rocker arm pivotably connected to the second end portion by a first pivot and a second rocker arm pivotably connected to the third end portion by a second pivot, such that as the ram vibrates along the welding axis, a line drawn through the first pivot and the second pivot remains substantially parallel to the welding axis.

11. The linear friction welding system of claim 10, wherein the at least one rocker arm further comprises:

a third rocker arm pivotably connected to the second end portion by a third pivot; and

a fourth rocker arm pivotably connected to the third end portion by a fourth pivot, such that as the ram vibrates along the welding axis, a line drawn through the third pivot and the fourth pivot remains substantially parallel to the welding axis.

12. The linear friction welding system of claim 10, wherein the carriage is pivotably connected to the ram by a fifth pivot.

13. The linear friction welding system of claim 9, further comprising:

a forge platen configurable to hold a second welding component, the forge platen movable along the press axis by the press assembly.

14. A linear friction welding system comprising:

a ram configured to vibrate along a welding axis;

at least one rocker arm with a first end portion connected to a base; and

a first welding component support member configured to hold a first welding component, the first welding component support member operably connected to the ram and supported by a second end portion of the at least one rocker arm such that movement of the ram from a first end stroke position to a mid-stroke position causes the first welding component support member to move from a first height along an axis orthogonal to the welding axis to a second height along the axis orthogonal to the welding axis as the first welding component moves along the welding axis, the second height different from the first height.

15. The linear friction welding system of claim 14, wherein:

the welding system is configured such that movement of the ram from a second end stroke position to the mid-stroke position causes the first welding component support member to move from the first height to the second height as the first welding component moves along the welding axis; and

the mid-stroke position is located between the first end stroke position and the second end stroke position along the welding axis.

16. The linear friction welding system of claim 15, wherein:

a third end portion of the first welding component support member is located proximate to the ram;

a fourth end portion of the first welding component support member is located distally from the ram; and

the at least one rocker arm comprises a first rocker arm pivotably connected to the third end portion by a first pivot and a second rocker arm pivotably connected to the fourth end portion by a second pivot, such that as the ram vibrates along the welding axis, a line drawn through the first pivot and the second pivot remains substantially parallel to the welding axis.

17. The linear friction welding system of claim 16, further comprising:

a second welding component support member configurable to hold a second welding component, the second welding component support member movable along the axis orthogonal to the welding axis by a press assembly.