METHOD OF THE ELECTRIC BUTT WELDING OF WORKPIECES

• US 3,612,811 A
• Filed: 04/25/1969
• Issued: 10/12/1971
• Est. Priority Date: 04/25/1969
• Status: Expired due to Term

• Current Assignee: Falkevich Alexandr Semenovich, Guseva Violetta Pavlovna, Krivonos Vadim Petrovich, Lifshits Viktor Senderovich, Podola Nikolai Vasilievich
• Original Assignee: Falkevich Alexandr Semenovich, Guseva Violetta Pavlovna, Krivonos Vadim Petrovich, Lifshits Viktor Senderovich, Podola Nikolai Vasilievich
• Inventors: LIFSHITS VIKTOR SENDEROVICH, GUSEVA VIOLETTA PAVLOVNA, KRIVONOS VADIM PETROVICH, PODOLA NIKOLAI VASILIEVICH, FALKEVICH ALEXANDR SEMENOVICH
• Application Number:
  US04/821,166
• Time in Patent Office: 900 Days
• US Class Current: 219/100
• CPC Class Codes: B23K 11/043 characterised by the electric circuits used therewith

Abstract

A method of effecting electrical butt welding of workpieces by continuously flashing the ends of the workpieces to be welded to a temperature within 0.7 to 1.0 of the melting point of the workpiece material and with a variation during the welding process of the flashing rate followed by upsetting; the extremal value of the power evolving in the workpieces to be welded being maintained in the course of the flashing process, whereas upsetting is effected to a value responsive to the distance between sections of the workpieces at a predetermined heating temperature depending on the properties of the workpiece material. An apparatus for carrying into effect the said method comprises a welding machine and a device for controlling the processes of flashing and upsetting, provided with two channels for controlling the welding process.

Claims

1. A method of electrically butt welding workpieces with a welding transformer having a primary circuit, said method comprising heating the surface of the ends of the workpieces to be welded to a temperature within a range of 0.7 to 1.0 of the melting point of the workpiece material through continuous flashing of the ends of the workpieces, measuring the power evolving in the workpieces to be welded, maintaining in the process of flashing the extremal value of the said power as a function of current flowing through the primary circuit of said transformer by varying the flashing rate, and upsetting the workpieces to be welded by a value equal to the distance between sections of the workpieces, at a preset heating temperature which is determined by properties of the workpiece material.