Determination of a temperature sensor location for monitoring weld pool size in GMAW

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Welding Journal (Miami); (United States)

OSTI ID:6803479

Boo, K S; Cho, H S ^[1]

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1. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Precision Engineering and Mechatronics

This paper describes a method of determining the optimal sensor location to measure weldment surface temperature, which has a close correlation with weld pool size in the gas metal arc (GMA) welding process. Due to the inherent complexity and nonlinearity in the GMA welding process, the relationship between the weldment surface temperature and the weld pool size varies with the point of measurement. This necessitates an optimal selection of the measurement point to minimize the process nonlinearity effect in estimating the weld pool size from the measured temperature. To determine the optimal sensor location on the top surface of the weldment, the correlation between the measured temperature and the weld pool size is analyzed. The analysis is done by calculating the correlation function, which is based upon an analytical temperature distribution model. To validate the optimal sensor location, a series of GMA bead-on-plate welds are performed on a medium-carbon steel under various welding conditions. A comparison study is given in detail based upon the simulation and experimental results.

• OSTI ID: 6803479
• Journal Information: Welding Journal (Miami); (United States), Vol. 73:11; ISSN 0043-2296
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON STEELS
GAS METAL-ARC WELDING
PROCESS CONTROL
TEMPERATURE MEASUREMENT
MEASURING INSTRUMENTS
POSITIONING
TEMPERATURE DISTRIBUTION
ALLOYS
ARC WELDING
CONTROL
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
STEELS
WELDING
360101* - Metals & Alloys- Preparation & Fabrication