Method of forming an impulse weld
AssigneeOhio State Innovation Foundation
InventorsAnupam VIVEK, Glenn DAEHN
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Abstract
Disclosed are methods of forming an impulse weld in a stack comprising a plurality of metal layers. Also disclosed herein are welded products exhibiting lower electrical resistivity when compared to an electrical resistivity of a substantially identical reference stack that was not yet welded. Also disclosed herein are systems for making such welded products.
Claims63
A method for producing an impulse weld in a stack comprising a plurality of metal layers, wherein the method comprises:
- imparting rising pressure to at least a portion of a first metal layer in the stack wherein the pressure is effective to project the first metal layer towards the rest of the plurality of metal layers to form a metallurgical bond between the plurality of metal layers,
- wherein a rate of a pressure rise is such that over about 50% of the pressure rise occurs in less than about 500 microseconds;
- and
- wherein the stack has a thickness from about 0.5 microns to about 4 mm;
- or
- wherein a thickness of a metal layer in the plurality of metal layers is from about 0.5 microns to about 4 mm.
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A system comprising:
- a stack comprising a plurality of metal layers;
- an auxiliary member configured to impart pressure to a first metal layer of the plurality of metal layers and such to cause a spot welding of the plurality of metal layers;
- and
- an energy source configured to accelerate the auxiliary multi-layer member toward the first metal layer of the plurality of metal layers.
Dependencies are inferred from the claim text.