Welding wire box with moisture protection

Abstract

In order to easily and safely reduce moisture accumulation on the welding wire (2, 2', 2") arranged in the wire box (1, 1a, 1b) or to remove existing moisture, the following settings are made: The flow rate (D 1 ) is regulated by means of a flow regulating unit (14), the purge air is supplied to the flow regulating unit (14) at a first pressure (p) and at the purge air outlet (24) of the welding wire box (1, 1a, 1b) at a Three pressures (p at ) is derived, and the adjusted flow rate (D 1 ), the third pressure (p at ) and the flow resistance between the scavenging air supply (15) and the scavenging air outlet (24) results in a second pressure on the scavenging air supply (15) (p 1 ), the second pressure is less than the first pressure (p), wherein, by stepping down from the first pressure (p) to the second pressure (p 1 ) to reduce the relative humidity of the scavenging air (rF 1 ).

Description

technical field [0001] The invention relates to a welding wire box for containing welding wire, which has a protective device against moisture, wherein a purge air supply and a purge air outlet are arranged on the welding wire box for supplying dry purge air The scavenging air supply line leads into the scavenging air supply part, the scavenging air outlet part has a scavenging air outlet for leading the scavenging air out of the welding wire box, and relates to a protective A method of protecting welding wire from moisture in a wire box. Background technique [0002] A known problem in shielding gas welding of specified materials, especially aluminum, titanium or other highly reactive metals, is so-called hydrogen porosity. In this case, due to the hydrogen in the area of ​​the welding point, there are pores in the weld seam which reduce the quality of the weld seam or even make it unusable. Hydrogen is often introduced, for example, through the supplied weld seam, since ...

AI Technical Summary

Problems solved by technology

Disadvantageous in this method is that there is no provision for active removal of the moisture introduced when the welding wire is placed in the system

Additionally, the hermetic seal makes handling the overall system significantly more difficult, increases cost and reduces flexibility

Gas cylinders are also proposed for supplying inert gas or dry air, which are disadvantageous in terms of cost and logistics

The use of pressure regulators for loading the overall system with overpressure has the additional disadvantage that in the event of leaks a very high mass flow of inert gas can escape from the system, which in turn leads to high costs

This not only increases the outlay for the welding process but also leads to higher costs

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