Inclined expanding bead threaded tube expander

Abstract

The invention relates to an inclined expanding bead threaded tube expander, which comprises an expanding shell, an expanding bead arranged in the expanding shell, and an expanding rod passing through the expanding shell, wherein the rear of the expanding bead and the middle of the expanding rod are marked with threads; the expanding bead is inclined in the expanding shell; and an included angle Arranging from 5 to 15 degrees is formed between the center line of the expanding bead and the center line of the expanding rod. When the inner and outer diameters of a tube are expanded, the expanding bead is inclined in the expanding shell and is screwed in along the expanding rod clockwise or anticlockwise, and the screw-in resistance is reduced; moreover, the threads of the expanding rod are matched with the threads of the expanding bead, so the expanding shell cannot retreat and the fine adjustment function can be realized when the inner and outer diameters of the tube are expanded.

Description

technical field [0001] The invention relates to a tube expander, in particular to an oblique bead threaded tube expander which can reduce the screwing resistance, increase the screwing force, and fine-tune the expansion. Background technique [0002] The tube expander is used to expand the inner and outer diameters of the tubes in the manufacture and maintenance of various containers. It is a kind of expansion tool that is tightly combined with the contact parts of the tube and the tube sheet, will not leak water or air, and can withstand a certain pressure. At present, the tube expanders for expansion joints on the market all use expansion beads to be placed horizontally and vertically in the expansion shell, and the expansion shell is provided with an inner eight-character trapezoidal groove, which will produce a large force when screwing into the inside of the tube. Resistance, and, because of the toughness of the tube material, the tube expander will shrink back, and if ...

AI Technical Summary

Problems solved by technology

At present, the tube expanders for expansion joints on the market all use expansion beads to be placed horizontally and vertically in the expansion shell, and the expansion shell is provided with an inner eight-character trapezoidal groove, which will produce a large force when screwing into the inside of the tube. Resistance, and, because of the toughness of the pipe material, the expander will shrink back. If the force is too large, it may break the barrier

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