Method for making a flux cored wire

Abstract

the ends of strip steels are butt-jointed with each other in the longitudinal direction in order and are connected by welding, when such long strip steel raw material is used for continuously making a thin flux-cored wire, the burr generated due to the shearing of the steel plate and continuously existing at the end of the width direction of the strip steel along the whole longitudinal direction of the strip steel faces the upper part of the connecting strip steels, then the ends of strip steels are butt-jointed with each other in the longitudinal direction, and are connected by welding, no burr toward the outside of the thin flux-cored wire exists. By adopting the method, the circularity of the flux-cored wire can be ensured, in case of thin flux-cored wire, no bad influence on the supply of the extending-out welding wire in the welding construction for a welding machine is caused, and the supply is good.

Description

technical field

[0001] The present invention relates to a method of manufacturing a flux-cored welding wire. Background technique

[0002] Among arc welding wires for automatic or semi-automatic welding, flux-cored wire (also called flux cored wire, FEW) filled with flux in a tubular outer belt steel is widely used. In this FEW, hoops targeted by the present invention include a type having a seam (hereinafter also referred to as seam) and a seamless type without a seam. Since the latter seamless type is expensive to manufacture, FCW with seams is generally used. The seamed FCW is described later figure 2 As shown in FIG. 9( b ), it refers to a welding wire in a closed state without joining the seam by welding or the like. Hereinafter, this seamed flux-cored wire is simply referred to as a flux-cored wire or FCW.

[0003] As a general manufacturing method of flux-cored welding wire, as shown in Fig. 9 (a) and (b) described later in detail, the following steps are continuo...

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