Rotatable multi-pin apparatus, and process for friction...

Details Rotatable multi-pin apparatus, and process for friction... Rotatable multi-pin apparatus, and process for friction...

2006-04-24

2009-10-06

Ward, Jessica L (Department: 1793)

Metal fusion bonding

Process

Using dynamic frictional energy

C228S002100

Reexamination Certificate

active

07597237

ABSTRACT:
A process is disclosed that creates a high shear rate in a workpiece using a head including a ring-shaped rotatable shoulder, a first pin and a second pin, both pins extending downwardly relative to the shoulder. The process includes coupling the workpiece to a table and rotating the first pin and the second pin in the same direction, wherein the first pin has a diameter, wherein a gap between the first pin and the second pin is less than the diameter. The head is plowed through the workpiece with the shoulder bearing downwardly against the workpiece and the first and second pin disposed in the first and second workpieces. The first pin rotates in a direction opposite the direction of the second pin in the gap to create a high shear rate of the workpiece within the gap.

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