Preparation device and method for making variable-section aluminum alloy tube with inner and outer thickening

Abstract

The invention discloses a preparation device and method for manufacturing inside and / or outside thickened aluminum alloy pipes with variable cross sections. The preparation device adopts an extrusion pin and an extrusion die body as extrusion moulds; the extrusion die body is an integral extrusion die with a die hole, and two reducer sizing zones are arranged in the die hole at an interval along an axial direction and are in bevel connection; a second working zone, a reducing zone and a first working zone are arranged from the front end of the extrusion die to the back at intervals along an axial direction, the outer diameter of the first working zone is larger than that of the second working zone, the outer diameter of the second working zone is larger than that of the reducing zone, and the two working zones are in bevel connection with the reducing zone; when the aluminum alloy pipes are manufactured, the extrusion amount of an aluminum alloy ingot and the position of the extrusion pin inside the extrusion die are respectively controlled through a control system so as to obtain the inside and / or outside thickened aluminum alloy pipes. With the utilization of the preparation device and the method, the inside and / or outside thickened aluminum alloy pipes with variable cross sections can be manufactured, and the defects of the traditional manufacturing methods are overcome, so that the manufacturing quality and efficiency of the aluminum alloy pipes with variable cross sections are improved.

Description

technical field [0001] The invention relates to a preparation device and method for making aluminum alloy tubes with variable cross-sections with inner and outer thickening. Background technique [0002] Aluminum is the second largest metal material after steel. It has developed very rapidly in recent decades and has been widely used in various fields of national economy and people's life. With the development of the national economy and the continuous progress of science and technology, a variety of requirements have been put forward for the section of the pipe. The general-purpose round pipe is no longer the most preferred structural form. Therefore, the research and development of aluminum alloy pipes with variable cross-sections have appeared. . In foreign countries, the variety quantity, production scale and quality level of variable cross-section aluminum alloy drill pipe have been greatly improved. The main feature of the variable cross-section aluminum alloy drill ...

AI Technical Summary

Problems solved by technology

This requires shutting down during the extrusion process in order to replace the mold and adjust the mechanism, often due to the poor combination of the mold flaps and the large gap between the mold flaps, the size of the metal entity of the pipe part exceeds the standard

Due to the use of segmented extrusion and manual mold change, it is easy for the mold to bruise the surface of the pipe near the transition zone, affecting the surface quality; for products with high requirements for dimensional accuracy and surface quality, follow-up machining is often required, so that The characteristics of extrusion cannot be fully utilized

In particular, these extrusion tools can only extrude variable-section pipes whose cross-section changes from small to large once, but cannot extrude continuously variable-section pipes or special-shaped parts whose cross-section changes from large to small and then from small to large repeatedly. Give full play to the advantages of variable cross-section profiles, limiting the variety and application range of variable cross-section extrusions

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