SU667352A1 - Method of welding with non-consumable electrode - Google Patents

Description

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The invention relates to the field of fusion welding of metals and can be used in the manufacture of structures using non-melted welding with an electrode.

A known method of welding metals with a non-consumable electrode moving around the circumference with the filler wire feeding at the interface. However, it does not allow for uniform reinforcement of the seam, since the seam is shifted away from the seam, and the quality of the seam is reduced to U.

The closest in technical essence and the achieved effect to the proposed invention is a method of welding with a non-consumable electrode in which the electrode moves along a circular path within the weld pool, while the filler wire is fed into the weld pool at the center of the joint 2,

The disadvantage of this method is the following.

In the process of welding when moving the electrode along a circular path, the molten metal is welding. shifts along an arc for some part of the path in the direction of rotation of the electrode. The filler metal supplied through the center of the joint, melted by a passing arc, also moves in the direction of movement of the arc. During the crystallization of the weld pool metal, an uneven weld reinforcement is formed, the highest part of which is shifted from the center towards the electrode moving along the circular

0 trajectories. The quality of the weld is reduced.

The purpose of the invention is to improve the quality of the weld by improving the shape of the weld.

The goal is achieved by displacing the filler wire from the joint by a radius of rotation. If this is the case, when

When the wire is fed in the direction opposite to the carriage movement, the wire is fed tangentially to the path of the electrode moving towards its rotation or towards

5 rotations Similar cases may occur in case of svpadnggga supply direction provbloki and directions of the carriage of the machine. For example, when with: cooking parts from steels of the type KVK, while moving

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electrode no of circumference r-2 mm, the filler wire is fed at a distance of 2 mm from the junction in the direction of movement of the electrode. The molten metal of the weld pool shifts towards the arc movement, during crystallization, the highest part of the weld is placed at the junction of the parts to be welded and the weld has a uniform reinforcement. The drawing shows the filler wire feeding circuit. Here: 1 filler wire, 2 - reinforcement of the seam, 3 - non-consumable electrode, moving along a circular trajectory, 4 - weldable joint, 5- direction of the carriage movement. Example. The argon arc welding of a butt joint from KVK-32 steel with a thickness of 2.5 mm was carried out. The current is -110-1ZOA, the speed of movement of the carriage is 12 m / h, the radius of rotation of the tungsten electrode is 2, 0 L | m. Filler. EP326 wire with a diameter of 1.6 mm was displaced parallel to the joint by 2 mm and fed at a speed of 15 m / hour.

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The resulting welds in quality and geometry satisfy the requirements.

Claims (2)

The proposed welding method is a more advanced technical solution and allows to obtain a more than 5 uniform distribution of the molten filler metal relative to the weld joint. Claims The method of welding with a non-consumable electrode moving along a circular path within the weld pool, with filler wire running along the joint, characterized in that, in order to improve the quality of the welded joint by improving the formation of the weld, the filler wire is shifted from the joint by the amount of radius of rotation. Sources of information taken into account in the examination 1. The author's certificate of the USSR 211703, cl. SB 23 K 9/30, 1966. 2. Authors certificate of the USSR, 329969, cl. At 23 K 9/16, 1970.