welding head

Abstract

To provide a welding head which contributes to improvement of effect of suppressing adhesion of dust to a protective glass.SOLUTION: A welding head (1) according to one aspect of the present disclosure includes an optical unit, a protective glass (2) for preventing dust from entering the inside of the optical unit, and a nozzle (5) that ejects gas in a first axial direction orthogonal to laser light. The nozzle (5) has: a curved portion (5f) that is smoothly curved in an S-shape from an introduction side toward an ejection side of the gas in a flow path of the gas disposed inside the nozzle (5) when viewed from a second axial direction orthogonal to the laser light and the first axial direction; a widened portion (5g) that is smoothly widened in the second axial direction from the curved portion (5f) toward the ejection port (5e) of the gas in the flow path of the gas; and a fin (5c) for throttling a flow amount at a portion immediately before the ejection port (5e) of the gas in the flow path of the gas.SELECTED DRAWING: Figure 1

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