SU585932A1 - Method of contact power supply to welding wire electrode - Google Patents

Description

one

This invention relates to methods for applying current to a welding wire.

A known method of supplying current to the welding wire in which axial nodach of the rollers 1 is carried out.

However, this method does not provide a long service life of the rollers.

The closest in technical essence and achieved results is the method of contact current supply to the welding wire with the help of two coaxially located rollers, which are pressed to the wire by turning them around their axes as they wear out 2.

The disadvantage of this method is intensive wear of the rollers.

The aim of the invention is to increase the life of the rollers.

This is achieved by the fact that according to the proposed method, the rollers are additionally moved along their axes.

This method is applicable mainly for cases where the diameter of the rollers is larger than the diameter of the fed wire, while the wear of the rollers occurs with greater intensity than the wear of the wire.

FIG. 1 shows a device for carrying out the proposed method, in section; in fig. 2 - rollers and wire in the interaction; in fig. 3 is a view along arrow A in FIG. 2; in fig. 4 - axonometric image of one of the rollers when interacting with the wire.

The rollers 1 are mounted coaxially, with their axis intersecting mutually perpendicularly with the axis of the wire shaft 2 (see Fig. 1). The wire moving 2 can have rotation (left or right) around its axis or move axially back and forth, or move simultaneously around the axis and

along the axis.

The rollers 1 initially have equal end surfaces with which the supplied wire contacts at the initial moment of feed along lines 3 (see Fig. 2). At the beginning

the feeds between the working face surfaces of the rollers establish a gap equal to the diameter of the moving wire. Further, due to friction, the rollers wear at the contacting area.

The wear of the rollers is compensated by their uniform mutual approach, which consists in a uniform counter-feed of the rollers with their simultaneous rotation around their own axes with an axial schag equal to two

diameters of moving wire. The feed axis coincides with the axis of the rollers.

As a result of the interaction of the moving wire with the rollers on the working ends of the latter, a two-way screw is formed

surface 4 with approaches 5, and

Contact with moving wire forms a cylindrical surface.

At the contact area, the rollers are separated by a two-way screw surface — a connector surface (see FIG. 3).

Thus, the application of this method ensures the wear of the rollers throughout the cross section, and uniform contact is achieved along the perimeter of the moving wire with the largest contact surface, an increase in the amount of useful metal used for abrasion. The duration of the rollers increases significantly and practically depends on the height of the rollers.

Claims (2)

1. USSR author's certificate number 435080, cl. In 23K 9/32, 1972. 2. USSR author's certificate No. 460679, В 23К 9/32, 1973. WM Shm f //: K: j f; xvy ii  sh, w Mm mfe .f J, 7 five pUS.