SU1397235A1 - Apparatus for automatic submerged overhead welding - Google Patents

Description

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This invention relates to ceiling welding equipment.

According to the main author's certificate No. 1353594, there is a known device for automatic submerged-arc welding in the overhead position, comprising a body for a flux with an outlet, a welding nozzle placed inside it and an inclined L-shaped forming lining, the angle of inclination of the section and located near the welding nozzle , and the angle of inclination of the other part of the pad L to the plane of the outlet of the corus is related by the relation

3 ° sc; a 13 ° 1 ° P 5 °,

moreover, the length of the above areas of the lining is selected according to the ratio

one,.

When such a device is welded above the top of an inclined L-shaped forming liner, a section of maximum flux pressure is created, which, in order to obtain high-quality welds, is positioned behind the arc at a distance equal to the length of the weld pool.

In addition, this device, by ensuring the distribution of the flux pressure value in the welding process at different parts of the weld pool formation, allows high-quality welding at a given constant welding mode, since the weld pool length does not practically change during the welding process of the same gap. | 1.

However, the prior art device does not allow high-quality welding in cases where welding of the same weldable joint is required at varying conditions during the welding process (for example, products with different thickness of the metal being welded and varying edge cutting geometry for one and of the same weld joint, etc.) To obtain high-quality welds when welding products in a changing mode, it is necessary simultaneously with changing the welding mode to change the position of the L-shaped forming sheet. in the direction of the longitudinal axis of the housing for the flux so that the top of the said support (above which a section of the maximum pressure of the flux is created during welding) is located beyond the arc at a distance equal to the weld pool length, which changes with the welding mode. In the known device there is no such possibility.

The aim of the invention is to expand the range of products to be welded and to improve the quality of welding.

This goal is achieved by the fact that. The device is equipped with a mechanism for adjusting the distance in the welding direction between the top of the L-shaped inclined forming pad and the welding nozzle mounted on the housing for the flux.

The drawing shows a device for automatic submerged-arc welding in the overhead position, longitudinal section.

The device comprises a housing 1 for a flux, in which a welding nozzle 2 is placed and forming a podkadka 3, made L-shaped. Plot a lining,

5 located near the mouthpiece, inclined at an angle to the plane of the outlet of the housing. And the other portion of the lining b is inclined at an angle p to the plane of the outlet of the housing.

On the housing 1 is mounted a mechanism for

0 adjustable change in the distance between the vertex of the L-shaped inclined lining and the welding nozzle, for example, the adjusting screw 4, the mechanism housing 5, the flywheel 6, the guide sleeve 7 and the guide rolling pin 8. The device works as follows. Prior to welding, depending on the specified welding mode, rotation of the handwheel 6 adjusts the position of the apex of the specified forming pad 3 relative to the mouthpiece 2 so that the maximum flux pressure area at the beginning of the welding process is located beyond the arc 9 ten.

At the beginning of the welding device is supplied

5 and is pressed against the surface of the product to be welded, flux is supplied to the housing 1, the drive of the device (or product) is actuated at a welding speed (not shown) and the arc is ignited.

In the process of welding the joint in a changing mode, along with a change in the welding mode and a change in the length of the weld pool, the rotation of the flywheel 6 also changes the position of the tip

5 forming the lining 3 relative to the welding jaws 2c so that the portion of the maximum flux pressure during the welding process is located beyond the arc 9 at a distance equal to the length of the weld pool 10. This maintains the relative position

0 is the area of maximum flux pressure relative to a predetermined section of the formation of the weld pool in the welding process at varying welding conditions.

The welding process ends with a sequential shutdown of the welding circuit,

 supplying flux, squeezing and withdrawing the device from the product.

Claims (1)

DEVICE FOR AUTOMATIC WELDING UNDER FLUX IN CEILING POSITION by author. St. No. 1353594, characterized in that, in order to increase the range of products to be welded and to improve the quality of welding, the device is equipped with a mechanism for adjustable change of distance in the direction of welding between the top of the L-shaped inclined forming lining and the welding mouthpiece mounted on the body for flux.