Metal part melting, extruding and quick-forming system and implementing method thereof

A metal forming and melt extrusion technology, applied in the field of rapid prototyping, can solve problems such as hindering the widespread popularization of metal material rapid prototyping technology, expensive laser system systems, and increased raw material costs, and achieves multiple heating and melting methods and controllable feeding speed. , the effect of low manufacturing cost

Inactive Publication Date: 2014-11-19
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of spherical powder needs to be processed by special methods such as plasma spheroidization, which leads to a substantial increase in the cost of raw materials; moreover, the molding technology based on high-energy beams such as electron beams and laser beams is expensive and expensive due to the use of laser systems and electron beam systems. Complicated, resulting in high overall molding cost and low molding efficiency, hindering the widespread promotion of rapid prototyping technology for metal materials

Method used

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  • Metal part melting, extruding and quick-forming system and implementing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The entire forming system is protected with a vacuum box 1, and the aluminum wire is put into the system. The diameter of the aluminum wire is 2mm, and it is hung on an automatically controlled spool 3. Before the system works, vacuumize to below 5Pa, and then fill it with argon to an atmospheric pressure; rotate the spool 3, and at the same time cooperate with the wire feeding system to push the aluminum wire into the crucible, heat the crucible to 900°C, and melt the aluminum in the middle and lower parts of the crucible , while the upper part of the crucible is kept below 500°C; continue to press the aluminum wire into the crucible, use the aluminum wire itself to apply pressure to the aluminum melt and extrude the melt from the extrusion nozzle; the bottom plate is heated and kept at 500°C. The extrusion nozzle scans the substrate according to a pre-planned path, filling out a device layer map. The base plate is then lowered one layer thick, and the nozzle continues...

Embodiment 2

[0026] Protect the entire forming system with a vacuum box 1, put the magnesium alloy strip into the system, the cross-sectional area of ​​the magnesium alloy strip is 9mm 2 , hang on a spool 3 that can be automatically controlled. Vacuum the system to 10 before working -2 Below Pa and keep in a vacuum state; rotate the bobbin 3, and at the same time cooperate with the wire feeding system, push the magnesium alloy strip into the crucible, heat the crucible to 750°C, melt the magnesium alloy in the middle and lower part of the crucible, and keep the upper part of the crucible below 400°C Continue to press the magnesium alloy strip into the crucible, use the magnesium alloy strip itself to exert pressure on the magnesium alloy melt and make the melt extrude from the extrusion nozzle; the bottom plate is heated and kept at 400°C. The extrusion nozzle scans the substrate according to a pre-planned path, filling out a device layer map. The base plate is then lowered one layer thi...

Embodiment 3

[0028]The whole molding system is protected with a vacuum box 1, and the iron wire is put into the system. The diameter of the iron wire is 1mm, and is hung on an automatically controllable spool 3. Before the system starts to work, first evacuate to below 5 Pa, and maintain this vacuum state; rotate the spool 3, and at the same time cooperate with the wire feeding system, push the iron wire into the crucible, heat the crucible to 1750°C, and melt the iron in the middle and lower parts of the crucible, and the crucible Keep the upper part below 1000°C; continue to press the iron wire into the crucible, and apply a gas pressure to the crucible to push the iron melt to be extruded from the extrusion nozzle; the bottom plate is heated and kept at 1000-1300°C; the extrusion nozzle is on the bottom plate Scanning according to the pre-planned path fills out a device layer map. The base plate is then lowered one layer thick, and the nozzle continues to fill the current layer profile ...

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Abstract

The invention discloses a metal part melting, extruding and quick-forming system and an implementing method thereof. The metal part melting, extruding and quick-forming system comprises a closed tank, a vacuum system and a gas flow control system, and a printing mechanism, a baseplate, a bobbin and a motion control system are arranged in the closed tank, wherein the bobbin is used for storing metal wires/strips, the printing mechanism comprises a crucible used for melting metal and an extruding nozzle, the baseplate is provided with heating pipes, a heat insulation device and a heatproof cover, the heatproof cover wraps the printing mechanism, and the motion control system is respectively connected with the printing mechanism and the baseplate. Metal is melted by independent heating and is extruded and formed; excellent performance of the metal is effectively combined with melting and extruding which is a low-cost and high-efficiency forming manner, so that the metal part melting, extruding and quick-forming system is low in forming cost, high in forming efficiency and applicable to massive popularization and application.

Description

technical field [0001] The invention belongs to the field of rapid prototyping, and in particular relates to a system for melting and extruding rapid prototyping metal parts and a realization method thereof. Background technique [0002] After more than 20 years of development, 3D printing (that is, rapid prototyping) technology has developed rapidly. Classified by printing materials, it can be divided into three-dimensional printing technologies of metal, non-metal, ceramic materials, composite materials and biological materials; classified by molding methods, it can be divided into powder sintering technology (SLS), powder melting technology (SLM), laser near Forming technology (LENS) and extrusion melting technology (FDM). Due to the relatively high melting point of metal materials, high-energy beam sintering / melting methods are generally selected, such as SLM, LENS and EBM technologies, and the materials need to be made into spherical powders with a particle size of 10 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115
Inventor 王国玉段宣明纪丽娜范树迁陈勇王林志
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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