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:
May. 02, 1989
Filed:
Jul. 05, 1988
Yuji Sugitani, Tokyo, JP;
Yoshikazu Sato, Tokyo, JP;
NKK Corporation, Tokyo, JP;
Abstract
A method for controlling a bead, in one-side automatic welding wherein a backing metal strip is adhered to the back side of a pair of work pieces through an inorganic material and arc welding is applied to the work pieces on the surface side thereof, comprises:detecting an electrical signal between the work pieces and the backing metal strip to control a weld current so that the detected electrical signal can be equal to a predetermined reference signal; and detecting the controlled weld electrical current and putting the detected weld electrical current into a formula of V.sub.1 =V.sub.0 .multidot.I.sub.L /I.sub.L0 to calculate a welding speed; and controlling the welding speed in accordance with the calculated welding speed, where V.sub.1 represents the calculated welding speed, V.sub.0 an initial value of the welding speed, I.sub.L the detected weld electrical current and I.sub.L0 a predetermined reference weld current. The electrical signal can be an electrical current signal or a voltage signal.