SU365229A1 - METHOD OF ARC WELDING TOOL WITHOUT ADDITIONAL MATERIAL OF THIN WALL CONES AND SHELLS - Google Patents

Description

one

This invention relates to the field of arc butt welding without the filler material of thin-walled cones, shells, etc.

The known method of arc welding of thin-walled nodes using clamping separate t rollers.

The disadvantage of this method is the poor fit of the edges and, as a result, the poor quality of welding in the production of thin-walled cones, shells of large diameter.

In order to obtain a tight joint of the edges according to the proposed method, the pressing separate pulling rollers rotate with different angular and, therefore, circumferential speeds relative to each other.

FIG. 1 shows rollers and weldable tape; in fig. 2 - position of the edges to be welded at the Starting moment; in fig. 3 - position of the edges to be welded at steady flow; in fig. 4 — normal welding with edge position synchronizer; in fig. 5 is a section along A-A in FIG. four; in fig. 6 - welding a thin-walled cone with an annular seam; in fig. 7 -welding thin-walled shell with an annular seam.

Weld tape placed on the table and pressed with rollers. The rollers are rotated and the belt begins to move in the feed direction.

At the initial moment of time, the joint of the edges being welded broke out (conventionally we consider the case of diverging edges). The overlap point of the edges to be welded is in front of the pull rollers.

After some time, the feed stabilizes, i.e. the welded ribbons begin to move in a constant time law. The overlap point of the edges being welded tends to be located in one place. The free movement of the welded strips in the angular ratio is limited, and the turn occurs at a small angle.

The normal welding of tapes was carried out by a welding torch located between the pulleys. A synchronizer for positioning the edges to be welded is located in front of the pulling rollers. In this case, the most reliable and stable retention of the joint, the melting of the edges and the last butt-welding without filler material is obtained.

The proposed method of butt-welding, without a filler material, can be used for welding thin-walled cones and shells with circumferential seams when rotating pressure separate pull rollers with different angular and, therefore, circumferential speeds relative to each other. In this case, the circumferential speeds on the rollers provide the specified welding speed (the speed of movement of the welded joint).

Welding of thin-walled cones with an annular seam is performed with the supply of welded blanks by pressing separate pulleys rotating with different angular speeds ((|)), providing the effect of reliable and stable retention of the joint as described above, providing high-quality welds and providing the specified welding speed .

When welding thin-walled shells with ring WB, the welding workpieces are supplied by pressing separate pulling rollers rotating with different angular speeds ((). The effect of reliable and stable retention of the joint is similar to that described above and gives high-quality welded grooves. welding.

Subject invention

An end-to-end arc welding process without a filler material of thin-walled cones and shells using pressured pull rollers, characterized in that, in order to obtain a tight edge joint, pressure rolls separate pull rollers rotate one with another at different circumferential speeds.

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