Manufacturing method of aluminum or aluminum-alloy seamless pipe

Abstract

The invention relates to a manufacturing method of an aluminum or aluminum-alloy seamless pipe, which comprises the following steps: according to a preset planetary mill, a tube blank used for rolling and rolling pass working rate, a roller of the planetary mill rotatably extrudes the outside surface of the tube blank used for rolling in high speed; supported by a round mandrel in the inner bore of the tube blank used for rolling, a rolled tube is rolled; the rolled tube is cooled; the cooled rolled tube is directly and coolly processed. By using the aluminum or the manufacturing method of the aluminum alloy seamless pipe, no heating tube bank is needed before rolling, thus effectively reducing energy waste; and no midway annealing treatment is needed, thus simplifying the manufacturing process, reducing the manufacture cost, effectively increasing the manufacture efficiency of the aluminum or the aluminum alloy seamless pipe and meeting the market demand of heavy coil aluminum or the aluminum alloy seamless pipe.

Description

technical field [0001] The invention relates to the technical field of metal pipe processing, in particular to a method for manufacturing an aluminum or aluminum alloy seamless pipe. Background technique [0002] In the field of modern industrial manufacturing, aluminum and aluminum alloys are widely used in the refrigeration and heat dissipation industry due to their low density and excellent thermal conductivity. effect. [0003] In the prior art, the production process of aluminum and aluminum alloy pipes is mostly to use aluminum or aluminum alloy blanks to go through surface peeling, heating, and then extruding on an extrusion machine to produce aluminum or aluminum alloy pipes. The above-mentioned method of producing aluminum or aluminum alloy seamless pipes in an extrusion machine is usually perforated extrusion, figure 1 It is a schematic diagram of extruding aluminum or aluminum alloy seamless pipes by piercing method in the prior art. It shows that a perforating ...

AI Technical Summary

Problems solved by technology

It can be seen that although continuous extrusion can be realized by using the above-mentioned split-flow combination die to produce aluminum or aluminum alloy pipes, there are several welded joints in the produced pipes, and the pipes at the welded joints have inconsistent states, so there are many defects in the pipes For example, the tensile strength and elongation of the seamed pipe are low when it passes the bending process and accepts the internal pressure test, so it cannot be widely used in industry

In addition, wh

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