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:
Sep. 25, 2001
Filed:
Jan. 20, 2000
Sergei I. Kuchuk-Yatsenko, 01025, Kyiv, UA;
Alecsandr V. Didkovskiy, 03186, Kyiv, UA;
Mikhail V. Bogorskiy, 04209, Kyiv, UA;
Valeriy G. Krivenko, 01010, Kyiv, UA;
Alexei I. Gorishnyakov, 04080, Kyiv, UA;
Vadim P. Krivonos, 01133, Kyiv, UA;
Other;
Abstract
A method of flash-butt welding in which the travel speed (V,) of the machine mobile plate and the welding voltage (U,) are changed (by preset programs) and the travel speed is controlled through negative feedback by welding current, the voltage being changed discretely for each flashing fixed interval of t,duration as a function of the increment of the actual average speed of flashing details of shortening (V,) during the previous flashing interval, V,value being maintained at the present level, lower than V,. The invention envisages a change of the coefficient of enhancement of the negative feedback in a discrete manner for each preset flashing interval of t,duration as a function of V,increment during the previous flashing interval. The invention further provides for an increase in the value of U,and a decrease of the coefficient of negative feedback to the set value until the speed has reached the set value of speed V,at which upsetting is switched on, or after the set value of Q,has been reached, U,is increased and the coefficient of negative feedback is decreased to the set value, these values remaining constant until upsetting is switched on.