A Study of Spot Welding Process to Reduce Spatter with the Hollow Tip

Jun, Jungsang; Rhee, Sehun

Journal of KWJS 2009;27(4):44-48.
Published online September 14, 2009.

팁 선단에 중공이 있는 전극을 이용한 스패터 저감 스폿 용접에 관한 연구

A Study of Spot Welding Process to Reduce Spatter with the Hollow Tip

Abstract

In automotive company, a lot of researchers have investigated for the spatterless welding process during last two decades. A spatter influences on the product quality such as strength and surface states. In this paper, a hollow tip is proposed for spatterless process. An optimal size of electrode hole is obtained from a weldability evaluation of each hole diameter. Through the cross section analysis, a phenomenon that molten metal moves in the hole which located between two workpiece is observed, and this makes spatterless welding process even though current is higher. Finally, widely acceptable weld area in lobe curve is obtained by using hollow tip as compare with conventional no hollow tip. In this paper, spatterless resistance spot welding with improvement weldability and productivity is proposed by using hollow tip.

Key Words: Hollow cap tip, Spatterless, Resistance spot welding