SU618224A1 - Apparatus for automatic arc welding with consumable piece electrodes - Google Patents

Description

I

The invention relates to electric arc welding with piece electric and can be used in heavy mechanical engineering in the automatic welding of metal structures.

A device for automatic welding is known in which the electrode wire is fed to the welding from cassettes or special turntables {IJ.

However, with a sufficiently large diameter of the electrode wire (over 8 mm), it becomes very difficult to put the wire in the cassette, and for its subsequent unwinding from the cassette or turntable and editing in the correct device of the machine, the latter must be equipped with an increased moschy drive. The additional load on the filler wire feed drive of the automaton, associated with the need to correct a large cross-section wire, adversely affects the wire feed uniformity, which leads to a reduction in the quality of welded joints, especially when welding at high speeds.

Another device for the automatic feeding of stick electrodes is also known, comprising a housing, drive rollers for feeding an electrode, a magazine for electrodes attached to the housing, an electrode holder with a current lead and a guide channel connecting the magazine with the electrode holder 2.

A disadvantage of the known device is the fragile connection of electrodes with a brittle coating.

The aim of the invention is to increase the reliability of the connection of stick electrodes by mechanically applying each last electrode to the melted one.

This goal is achieved by the fact that the device is equipped with a device for connecting electrodes, which is placed between the magazine and the rollers for supplying the electrodes and is made in the form of a pair of drive rollers.

FIG. 1 shows a diagram of the device;

in fig. 2 - one of the possible options for stkko-vki. the ends of the electrodes and their assembly.

The device includes a magazine 1 for accommodating the rectilinear rods - electrodes 2, a spring 3, a feed channel 4, rollers 5 and feed rollers 6,

The device works as follows. As the electrodes are consumed about; the ered rod is pressed by the spring 3 to the guide channel 4, and then by the rollers 5, which have a speed of rotation,

In excess of the rotational speed of the feed rollers 6, it is fed to the electrode 7, which is currently melting, and is connected to it (Fig. 2). Pressing them together due to the difference in the speeds of rotation of the rollers 5 and 6, at least on the O., ensures the strength of the articulation of these rods. It is advisable that the conical part be in the lower electrode, and the dimple in the upper electrode, since in this case the increase in the diameter of the lower 6 electrode due to the heating by the heat of the arc improves the reliability of the connection. Other methods of connecting electrode rods are possible, for example, threaded, however, this complicates the design of the mechanism for connecting the electrodes.

Claims (2)

1.Automatic electric arc welding, ed. E. 0. Treacle, Mashgiz, 1953, p. 308. 2. Japan patent number G60, class. 12 B 105.3, 1960.