Friction welding of aluminum and ferrous workpieces
Abstract
Abstract A method of joining together an aluminum workpiece and a ferrous workpiece by relative rotation of the workpieces while the workpieces are forced together at mutually engaging parallel, planar surfaces. The surfaces are thereby frictionally heated, and sufficient axial pressure is applied to the workpieces to pressure weld them together at the interface of the planar surfaces using an amount of rotational, kinetic energy input to the weld area in the range of about 3,500 to 5,500 pounds per square inch of weld area. The compressive yield strength of the aluminum alloy workpiece at the temperature to which the planar surfaces are heated by the rotational energy is such that the amount of metal of the aluminum workpiece radially displaced at the interface is less than 10 percent of the weld area.
Inventors
- 👤 Fred R Hoch
- 👤 James W Mcintee
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |