Die for manufacturing seamless five-petal plum-blossom-shaped steel pipe

Abstract

The invention discloses a die for manufacturing a seamless five-petal plum-blossom-shaped steel pipe. The die comprises a die body (1) arranged on cold-drawing equipment, wherein a forming channel (3) is formed in the die body (1), and is provided with an inlet (5) and an outlet (4); a feed opening (7) in which a round pipe can be inserted is formed in one end, close to the inlet (5), of the forming channel (3), and a discharge opening (3) is formed in one end, close to the outlet (4), of the forming channel (3); each of the inlet (5) and the outlet (4) of the forming channel (3) has a five-petal plum-blossom-shaped cross section; the forming channel (3) is a spiral channel. According to the die for manufacturing the seamless five-petal plum-blossom-shaped steel pipe, the performance of the produced seamless five-petal plum-blossom-shaped steel pipe is higher than that of a conventional cold-drawn seamless five-petal plum-blossom-shaped steel pipe, the filling of concrete is avoided, and the die is low in cost and convenient to use.

Description

technical field [0001] The invention relates to an industrial device for forming steel pipes, in particular to a mold for manufacturing seamless five-petal quincunx-shaped steel pipes. Background technique [0002] Seamless steel pipe is a long strip of steel with a hollow section and no seams around it. Because the seamless steel pipe has a hollow section, it is widely used as a fluid pipe. Compared with solid steel, the seamless steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical section steel and is widely used in the manufacture of structures. components and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in building construction. Seamless steel pipes can be divided into circular, square, triangular, five-petal plum-shaped and other shapes according to the cross-sectional shape. In the space structure, five-petal plum-shaped steel pipes are widely used as ...

AI Technical Summary

Problems solved by technology

Seamless steel pipes can be divided into circular, square, triangular, five-petal plum-shaped and other shapes according to the cross-sectional shape. In the space structure, five-petal plum-shaped steel pipes are widely used as structural members, especially in the construction industry. Petal quincunx-shaped steel pipes are used more and more widely, such as geological exploration screw drilling tools, national landmark buildings, large billboard brackets, hardware manufacturing, defense missile launchers and satellite launchers and other brackets and launchers. The performance requirements of petal plum-shaped steel pipes are also getting higher and higher. According to the existing technology, ordinary cold-drawn seamless five-petal plum-shaped steel pipes have low performance such as low torsional strength and low tensile strength. Filled with concrete, which is expensive and inconvenient to use

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