Welding contact tip

Abstract

A welding contact tip in which a distal end of a copper alloy adapter 10 having a first center hole 11 is screwed to a molybdenum alloy housing 20 having a second center hole 21 having a diameter smaller than a diameter of the first center hole. The adapter 10 and the housing 20 are screwed with each other with a large torque to plastically deform threads, and the adapter and the housing are crimped and fixed. The length of the second center hole 21 is set to 1/3 or less of the length of the first center hole 11, and a welding current intensively flows through the welding wire at the inner face of the second center hole 21. The welding wire is less likely to be clogged, the welding current is less likely to vary, and the service life can be significantly extended.

Dependencies are inferred from the claim text.