Rod-needle separated magnesium alloy slim tube preparation device and method

A preparation device and magnesium alloy technology, applied in the direction of metal extrusion dies, metal extrusion mandrels, etc., can solve the problems of difficult to ensure the dimensional accuracy of pipes, reduce the strength of pipes, and reduce stability, so as to achieve good surface quality and reduce processing costs. High cost and compactness

Inactive Publication Date: 2021-01-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of metal sheet making machine uses special materials called metals like Magnetite or Iron powder instead of traditional methods such as casting molten iron into ingots made from these types of alloys. These machines have several technical benefits: they make it easier to produce smaller tubular products without any imperfections during manufacturing processes, resulting in better performance characteristics than existing techniques while reducing costs compared to current methods. Additionally, this technology allows for more precise control over how much each component needs to be added when producing certain specific shapes.

Problems solved by technology

This patents describes technical problem addressed in this patented paper that relates to improving the physical property and durability of magnetically strong and heat resistant structures called MgAlloys, particularly when they contain rare earth elements or impurities during production processes. Current techniques involve expensive and complicated procedures involving many steps before final shaping into desired shapes, leading to decreased efficiency and increased costs associated with manufacturing these types of components.

Method used

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  • Rod-needle separated magnesium alloy slim tube preparation device and method
  • Rod-needle separated magnesium alloy slim tube preparation device and method
  • Rod-needle separated magnesium alloy slim tube preparation device and method

Examples

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Effect test

Embodiment example 1

[0039] This implementation case relates to a method for preparing a thin magnesium alloy tube separated from a rod and a needle, and the method includes the following steps:

[0040] (1) Carry out wire-cutting, turning processing, and drilling of Mg-1.84Zn-0.31Mn-0.18Ca alloy ingot to obtain a hollow cylindrical billet with an outer diameter of 30 mm, a height of 15 mm, and a middle through hole diameter of 6.5 mm;

[0041] (2) Apply graphite-based lubricant to the inner wall of the extrusion cylinder, the wall of the extrusion die hole, the surface of the extrusion needle, and the lower surface of the extrusion needle cushion, and then put it in a resistance furnace and heat it to 400 ° C, put in a hollow cylindrical blank, and keep warm 5min;

[0042] (3) Take out the mold and the billet, assemble them on the extrusion die base, install them, and carry out extrusion when the temperature drops to 380°C. The extrusion ratio is 30.6:1, and the extrusion speed is 2mm / s to obtain

Embodiment example 2

[0046] This implementation case relates to a method for preparing a thin magnesium alloy tube separated from a rod and a needle, and the method includes the following steps:

[0047] (1) Carry out wire-cutting, turning processing, and drilling of Mg-1.85Zn-0.21Mn-0.21Ca alloy ingot to obtain a hollow cylindrical billet with an outer diameter of 30 mm, a height of 15 mm, and a middle through hole diameter of 6.5 mm;

[0048] (2) Apply graphite-based lubricant to the inner wall of the extrusion cylinder, the wall of the extrusion die hole, the surface of the extrusion needle, and the lower surface of the extrusion needle cushion, and then put it in a resistance furnace and heat it to 400 ° C, put in a hollow cylindrical blank, and keep warm 5min;

[0049] (3) Take out the mold and the billet, assemble them on the extrusion die base, install them, and carry out extrusion when the temperature drops to 360°C. The extrusion ratio is 13.4:1, and the extrusion speed is 3mm / s to obtain

Embodiment example 3

[0053] This implementation case relates to a method for preparing a thin magnesium alloy tube separated from a rod and a needle, and the method includes the following steps:

[0054] (1) Carry out wire-cutting, turning processing, and drilling of the Mg-4.11Zn-0.26Mn-0.16Ca alloy ingot to obtain a hollow cylindrical blank with an outer diameter of 30 mm, a height of 15 mm, and a middle through hole diameter of 6.5 mm;

[0055] (2) Apply graphite-based lubricant to the inner wall of the extrusion cylinder, the hole wall of the extrusion die, the surface of the extrusion needle, and the lower surface of the extrusion needle cushion, and then put it in a resistance furnace and heat it to 420°C, put a hollow cylindrical blank, and keep warm 5min;

[0056] (3) Take out the mold and the billet, assemble them on the extrusion die base, install them, and carry out extrusion when the temperature drops to 390°C. The extrusion ratio is 30.6:1, and the extrusion speed is 3mm / s to obtain se

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Abstract

The invention discloses a rod-needle separated magnesium alloy slim tube preparation device and method, and belongs to the technical field of metal materials and machining thereof. The device mainly comprises an extrusion rod, an extrusion needle, an extrusion needle pad, an extrusion female die, a female die pad, an extrusion cylinder, a fixing sleeve, an extrusion die holder and a demoulding frame, wherein the extrusion rod is separated from the extrusion needle, the extrusion needle can freely move to a certain degree in the extrusion cylinder in the extrusion process, automatic centering is achieved, the pipe size precision is improved, the extrusion needle and the extrusion female die can be replaced at any time, and the diameter and wall thickness of the tube are controlled by adjusting matching of the extrusion needle and the extrusion female die. The magnesium alloy slim tube prepared through the process is uniform in structure, excellent in mechanical property, good in surfacequality and accurate in size; and the device is simple, low in machining cost, high in efficiency, high in material utilization rate and capable of achieving mass production.

Description

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Claims

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Application Information

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Owner BEIJING UNIV OF TECH
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