SU1668072A1 - Method for measuring electromagnetic force of welding circuit - Google Patents

Abstract

The invention relates to electric arc welding and can be used to measure the electromagnetic force of a welding circuit in machine building and shipbuilding. The purpose of the invention is to improve the quality of the welded joint by improving the accuracy of measuring the electromagnetic force during the welding process. When welding under the part have a different thickness of the stack of ferromagnetic plates, equal in size. The stacks are arranged in a row in the welding direction in a sequence from maximum thickness to minimum. By sucking under the action of a magnetic field of their own, the maximum mass is determined by the magnitude of the electromagnetic force. Measuring the electromagnetic force of the welding circuit allows you to eliminate the magnetic blast and use your own magnetic field to improve the formation of the welds in one-sided welding on a flux cushion. 1 il.

Description

The invention relates to electric arc welding and can be used when changing the electromagnetic force of a welding circuit.

The purpose of the invention is to improve the quality of the welded joint by improving the accuracy of measuring the electromagnetic force during the welding process.

The drawing shows an installation diagram for measuring the electromagnetic force of the welding circuit (I is the welding current; VCe is the direction of the welding speed).

An increase in the productivity of automatic welding is accompanied by an increase in the magnitude of the current and the magnetic field of the welding circuit. As a result, the influence of the magnetic field on the hydrodynamics of the liquid metal in the bath and the formation of seams is enhanced. To eliminate magnetic blowing and the harmful effects of a magnetic field of its own, the formation of seams requires the measurement of electromagnetic forces acting on the arc and the liquid metal of the bath,

In the process of welding, under the part made in the form of a plate on which surfacing is carried out, a series of stacks are assembled, which are assembled from a different number of ferromagnetic plates of equal area and thickness. The stacks are located in the welding direction from the maximum thickness to the minimum, with the upper planes of all the stacks being located at the same distance from the bottom plane of the plate on which the surfacing is performed. For this, a stack is mounted on a support element in the form of a ladder made of a non-ferromagnetic insulating material, with the height of the step of the ladder being equal to the thickness of the plate.

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maximum thickness, and at the top - the minimum.

By sucking under the action of a magnetic field of their own, the maximum mass is determined by the magnitude of the electromagnetic force. The arrangement of the stacks of ferromagnetic plates on the textolite ladder, whose step height is equal to the thickness of a single plate, provides the same distance from the plate to all the stacks and eliminates the influence of the ladder on the magnetic field of the welding circuit. During the welding process, a welding current flows through the plate and an electromagnetic field is created, under the action of the electromagnetic force of which the stacks of ferromagnetic plates are attracted to the plate being welded. The magnitude of the electromagnetic force at a distance from the plate is measured by the weight of the stack of greatest thickness drawn to the plate. By measuring the electromagnetic force at a certain distance from the plate, the magnitude of the electromagnetic force in the welding panel, which is inversely proportional to the square of the distance, is determined.

The method for measuring the electromagnetic force of the welding circuit is as follows.

Under the plate 1, to which the surfacing will be performed, at a certain distance from the bottom surface there are stacks of various thickness, consisting of ferromagnetic plates 2 of a unit area. The stacks are set in the direction of welding in the sequence from the maximum thickness at the bottom step to the minimum thickness at the top step of the textolite ladder 3, the height of which is equal to the thickness of a single plate. A textolite ladder is placed on a movable upright table, allowing

adjust the distance from the plate. When the arc is excited, a current begins to flow through the plate and the weld pool, which creates a magnetic field. As the arc approaches the stacks of ferromagnetic plates, they begin to attract the plate to be welded in accordance with the magnitude of the electromagnetic force. In the process of surfacing fix the maximum mass of the pile,

leaned to the plate.

Compared with the prototype, the proposed method makes it possible to measure the electromagnetic force of the upward-facing welding circuit and to use

to ensure the quality of the formation of the back roller on the flux cushion during single-sided welding.

Claims (1)

Invention Formula Electromagnetic Measurement Method strength of the welding circuit, consisting in that the welding current is passed through a part characterized in that improving the quality of the welded joint by increasing the accuracy of measuring the electromagnetic force in the welding process, a series of stacks are assembled under the part, collected from different numbers of ferromagnetic plates of equal size and thickness, with the stacks arranged in a row in the directions from the maximum thickness to the minimum, while the upper planes all the stacks are placed at the same distance from the lower plane of the part, the stacks are mounted on a support element made in the form of a ladder from a non-ferromagnetic insulating mother ala with a step height equal to the thickness of the plate, and The magnitude of the electromagnetic force is determined from the weight of a stack of maximum thickness, attracted to the plate by its own magnetic field. I + cr Vc6 LOW / g s