Method of cold welding aluminum

• US 3,100,933 A
• Filed: 10/15/1956
• Issued: 08/20/1963
• Est. Priority Date: 10/15/1956
• Status: Expired due to Term

• Current Assignee: James L. Hancock, Lee J. Lakes
• Original Assignee: James L. Hancock, Lee J. Lakes
• Inventors: Hancock, James L., Lakes, Lee J.
• Application Number:
  US03/615,968
• Time in Patent Office: 2,500 Days
• US Class Current: 228/116
• CPC Class Codes: B23K 20/2336 both layers being aluminium
• CPC Class Codes: H01G 4/245 Tabs between the layers of a rolled electrode
• CPC Class Codes: H01R 4/62 Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors H01R4/68 takes precedence
• CPC Class Codes: Y10T 29/435 Solid dielectric type
• CPC Class Codes: Y10T 29/49169 Assembling electrical component directly to terminal or elongated conductor

Claims

3. IN COLD PRESSURE WELDING OF A FIRST AND SECOND ALUMINUM MEMBER TO ONE ANOTHER WHEREIN EACH MEMBER HAS A COEXTENSIVE, EXTREMELY THEREIN, NATURAL ALUMINUM OXIDE FILM ON THE SURFACES THEREOF, THE ART WHICH INCLUDES FORMING A FRIABLE, ADHERENT, OXIDE FILM SUPERIMOPOSED UPON SAID THIN NATURAL OXIDE FILM ON ONE OF SAID MEMBERS, SUPERIMPOSING SAID MEMBER WITH THE FRIABLE, ADHERENT OXIDE FILM ON SAID ONE MEMBER IN FACE-TO-FACE CONTACT WITH THE NATURAL OXIDE FILM ON THE OTHER MEMBER, AND THEN COLD FORMING SAID MEMBERS BY APPLYING PRESSURE ACROSS SAID MEMBERS AND FILMS UNTIL SHATTERING OF SAID FILM OCCURS AND PLASTIC FLOW AND BONDING OF THE ADJACENT PORTIONS OF SAID MEMBERS IS PROMOTED.