SU1719171A1 - Method for arc-welding thin-sheet structures - Google Patents

Abstract

The invention relates to electric arc welding with a non-consumable electrode, mainly when welding thin-sheet structures with varying geometry of the joint. The purpose of the invention is to improve the quality of the welded joint of thin-sheet structures, which are mainly welded by weight, by controlling the heat sink in the places where the symmetry of the thermal field breaks down due to a change in the curvature of the joint. The method consists in the fact that the edges of the blanks are assembled end-to-end and welded; heat is pressed from water. For each curved section, the center of curvature is determined and the heat sink is rotated in the direction coinciding with the welding direction. 1 il. 1 tab. w Ё

Description

The invention relates to electric arc welding with a non-consumable electrode of predominantly thin-sheet structures with a varying geometry of the joint and can be used in the field of mechanical engineering when welding curvilinear joints.

The purpose of the invention is to improve the quality of the welded joint of thin-sheet structures welded predominantly on weight by controlling the heat sink in places where the symmetry of the thermal floor is violated due to a change in the curvature of the joint.

The drawing shows the implementation of the method.

When implementing the method, the edges of the welded parts 1 and 2 are processed and butt-assembled with a gap along the butt-line 3 not more than 0.2 mm. Break the line

joint 3 depending on the geometry of the areas AB, BC, SD, DE, EG.

For curvilinear section 3 of the joint SV and ED, the center of curvature is the points Ot and O2. The direction of rotation of the heat-retaining clip 4 relative to the electrode 5 is determined when the burner moves around each center. When the burner moves relative to the center Oi, the rotation of the presser 4 in the direction Wi is determined counterclockwise. When the torch moves relative to the center 02, the rotation of the presser 4 is determined in a direction W2 clockwise. In the straight-line sections of the junction 3, the AB, DM and ET clamp 4 do not rotate. Then, welding is performed by moving the torch along junction 3 and rotating the pressure heat sink 4 in areas having curvature in the direction established for each section.

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Primer p. Welded steel IXI8HIOT thickness of 1.2 mm. Welding modes are shown in the table.

The application of the method will improve the quality of thin-walled structures of complex geometry when welding them on weight, reduce scrap through burn-throughs, lack of penetration, distortion, and expand the scope of application of automated welding methods on machines with PU.

Claims (1)

Invention Formula The method of arc welding thin-sheet structures, in which before welding billets are assembled end-to-end, and in the process of welding a heat sink is performed, so that, in order to improve the quality of welding of thin-sheet structures with varying geometry of the joint, mainly welded by weight, by controlling the heat sink in In places where the symmetry of the thermal field is violated, for each curvilinear section, the center of curvature is determined and the heat sink is rotated in the direction coinciding with the direction of welding.