A new current measurement method in resistance spot welding

Author

Park, Soo Woong ; Na, Suck Joo

Author_Institution

Dept. of Production Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

39

Issue

5

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

767

Lastpage

772

Abstract

A method of measuring the high current in resistance welding processes is investigated. A measuring unit is developed by using a strain gage attached on the outer surface of a steel ring. The steel ring is placed around a section of the secondary loop of the welding machine and is deformed by electromagnetic forces induced by the high welding current. The circumferential constituent of the ring deformation is then used to obtain a signal voltage proportional to the secondary welding current. The strain gage signal of ring deformation is enough to determine the welding current in resistance spot welding, especially when direct current is used for the welding

Keywords

electric current measurement; resistance welding; strain gauges; current measurement; direct current; electromagnetic forces; proportional voltage signal; resistance spot welding; ring deformation; secondary loop; secondary welding current; steel ring; strain gage; welding machine; Current measurement; Electrical resistance measurement; Electromagnetic forces; Electromagnetic measurements; Measurement units; Spot welding; Steel; Strain measurement; Surface resistance; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.58623

Filename

58623