SU1696205A1 - Method of arc butt welding - Google Patents

Abstract

The invention relates to arc welding with transverse vibrations of a non-melting electrode of the joints of extra-high sheets of steel and alloys with a thickness of 0.3 to 1.0 mm and can be used in various industries. The purpose of the invention is to increase the strength of welded butt joints of very thin sheets by increasing the length of the fusion zone. In arc welding with a non-consumable electrode of extra-thin-walled parts, the pitch and amplitude of oscillations are determined from the ratios t K – D A (1 - V 1 –K2) / 2 D. where t is the step of oscillation of the electrode, mm; D is the diameter of the weld point, mm; A is the amplitude of oscillation of the electrode, mm; Kg (0.91: 0.93) The method of arc welding allows an increase in the efficiency of the welded joints of particularly thin-walled parts. 1 silt

Description

The invention relates to arc welding with transverse vibrations of a non-melting electrode of butt joints of very thin sheets of steel and alloys with a thickness of 0.3 ds 1.0 mm and can be used in various industries.

The purpose of the invention is to increase the strength of welded butt joints of particularly thin sheets by increasing the length of the fusion zone.

The drawing shows a diagram explaining the method.

The diameter of the weld point D is preliminarily determined with a fixed arc and a working welding current value.

The step size of the transverse oscillations of the electrode t is determined from the expression

t K D,

where K is the coefficient of mutual overlap of individual points with a diameter D in the extreme positions of the electrode, chosen in the range from 0.91 to 0.98.

At K20.98, there is an insufficient mutual overlap of points, which reduces the strength of the welded joint. At K Ј 0.91, due to excessive mutual overlap, the length of the fusion line is reduced and the strength of the welded joint decreases.

Before welding, the joint of parts is established along the axis of symmetry and the welding process begins with transverse oscillations of the electrode with an oscillation step t and amplitude of oscillation A.

The amplitude of the transverse oscillations of the electrode is determined from the relation:

A (1 - D / 2

When the magnitude of the transverse oscillations

"..

A (1 - / T-K2) D / 2

shortens the length of the zone of collapse and decreases the strength of the joint.

The maximum magnitude of the amplitude of the transverse oscillations of the electrode A is determined by a large space, a gap in the junction of other technological factors I.

Then, given the value of the welding speed S c from the known dependence, the frequency of the transverse oscillations of the electrode is determined.

Gkol Vra / t.

For example, the arc welded / non-melted metal was produced by evil, we give birth to longitudinal seams rough with a diameter of 80 mm from titanium alloy OT-I with a thickness of 0.5 to them.

An arc-to-butt weld process, in which welding is carried out with transverse oscillations of an arm

The strength of the base was

65 kg / mm. The imprint diameter of the arc 20 of the electrode, characterized in that

was 2 mm. Welded workpieces for the purpose of increasing the strength of the welded tests show that the strength of welded joints obtained by welding with parameters within the proposed limits is 0.96-1.0 of the strength of the base metal. The destruction of such compounds occurs on the base metal. In case of welding parameters beyond the limits, the strength of the welded joint is 0.80-0.95 of the strength of the base metal.

Thus, the method of arc welding of butt joints makes it possible to increase the efficiency of products from highly thin sheets.

The results are tested in that face.

Claims (1)

Invention Formula An arc-to-butt weld process, in which welding is carried out with transverse oscillations of an arm swerve rolling The magnitude of step 0 of the popresc electrode oscillations was determined from the expression .D. The value of gmplshutsy are transverse to the const electrode Def. M / l-1 mch FS-o. O / o A (1 - O / 2, unification of the self-bonded parts by increasing the length of the fusion zone, the step and amplitude of oscillations of the electrode are determined from the ratios t  K-D and ILUJHIL -D, where - oscillations of the electrode, mm; D is the diameter of the common point, mm; L is the amplitude of oscillation of the electrode, mm 0.91; 0 98 „,. .-.