METHOD OF PROCESSING ALUMINUM ELECTRICAL CONDUCTORS

• US 3,826,690 A
• Filed: 10/22/1971
• Issued: 07/30/1974
• Est. Priority Date: 02/25/1971
• Status: Expired due to Term

• Current Assignee: AT&T Technologies Inc (Nokia Corporation)
• Original Assignee: Bleinberger W, Franke E, Galloway J, Richardson G, , Thomas A., Thomas P
• Inventors: BLEINBERGER W, FRANKE E, GALLOWAY J, THOMAS P, RICHARDSON G, THOMAS A
• Application Number:
  US05/191,628
• Time in Patent Office: 1,012 Days
• US Class Current: 148/526
• CPC Class Codes: B21C 37/045 Manufacture of wire or bars with particular section or properties
• CPC Class Codes: C21D 9/56 Continuous furnaces for strip or wire
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: Y10T 29/49986 Subsequent to metal working

Abstract

ALUMINIMUM OR ALUMINUM ALLOY WIRE HAVING A RELATIVELY HIGH PERCENTAGE OF ELONGATION AND RELATIVELY HIGH FATIQUE RESISTANCE IN ADDITION TO SUBSTANTIALLY HIGH YIELD AND TENSILE STRENGTH IS MANUFACTURED BY A CONTNUOUS AUTOMATICALLY CONTROLLED PROCESS INVOLVING THE STEPS OF COLD WORKING THE WIRE BY INITIALLY DRAWING THE WIRE TO A DIAMETER NEAR THE FINAL DIAMETER AND CLEANING THE WIRE IN A SOLVENT THEN THE WIRE IS STAND ANNEALED WITH A LOW FREQUENCY INDUCTION ANNEALER WITH PROVISIONS FOR REGULATING THE ANNEALING TEMPERATURE TO PRECISELY CONTROL THE ANNEALING BY COMPENSATING FOR DISTURBING FACTORS SUCH AS CHANGES IN LINE SPEED AFTER WHICH THE WIRE IS DRAWN IN A SPECIALLY CONTROLLED ENVIROMENT WHILE CONTROLLING AUTOMATICALLY THE STAND ANNEALING AND THE HEAT LOSS BETWEEN THE STRAND ANNEALING AND THE SPECIALLY CONTROLLED ENVIROMENT TO MAINTAIN THE TEMPERATURE OF THE WIRE BEING ADVANCED INTO THE SPECIALLY CONTROLLED ENVIROMENT ABOVE THE STRAIN RECRYSTALLIZATION TEMPERATURE OF THE WIRE MATERIAL. THEN THE WIRE IS RECLEANED IN A SOLVENT AFTER WHICH INSULATION IS EXTRUDED ONTO THE WIRE, AND STRESSES IN THE WIRE ARE DISTRIBUTED BY REVERSE BENDING OF TH WIRE.

Claims