The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1977
Filed:
Oct. 14, 1975
Vladimir Konstantinovich Lebedev, Kiev, SU;
Ivan Alexeevich Chernenko, Kiev, SU;
Nikolai Ivanovich Postolaty, Kakhovka Khersonskoi oblasti, SU;
Sergei Ivanovich Kuchuk-Yatsenko, Kiev, SU;
Vladimir Ivanovich Tishura, Kiev, SU;
Yakov Borisovich Entin, Kolomna Moskovskoi oblasti, SU;
Alexandr Nikolaevich Filippov, Kolomna Moskovskoi oblasti, SU;
Evgeny Petrovich Martynov, Kolomna Moskovskoi oblasti, SU;
Other;
Abstract
A method for controlling flashing speed during resistance butt welding comprises measuring values of current density for at least two joints between parts being welded, converting them into d-c. voltages, detecting a maximum voltage value, comparing it to a preset d-c. voltage, the resultant difference value being used as flashing speed control parameter. An apparatus for carrying out the method comprises electric circuits whose number is equal to the number of joints being welded. Each circuit comprises a welding transformer and a circuit for conversion of flashing current density into d-c. voltage. A maximum signal detector comprises circuits for conversion of current density into d-c. voltages, whose number is equal to the number of joints being welded. The detector output is connected to the circuit for comparing a current voltage value to the preset one. The apparatus according to the invention may be used mainly for controlling flashing speed during concurrent resistance butt welding of several joints of large and different respective cross-sectional areas.