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Connecting method and device for large-size light 3D printing metal structures

A 3D printing and metal structure technology, applied in the supporting field of 3D printing, can solve problems such as collapse, poor organizational consistency, and limited space

Inactive Publication Date: 2020-06-05
NANJING CHENGUANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Electron beam welding: limited space, poor flexibility of complex structures, and collapse;
[0007] Laser welding: there is collapse and poor organizational consistency

Method used

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  • Connecting method and device for large-size light 3D printing metal structures
  • Connecting method and device for large-size light 3D printing metal structures
  • Connecting method and device for large-size light 3D printing metal structures

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] In order to realize the laser melting deposition connection of the closed cavity and prevent the laser melting deposition powder from entering the closed cavity, several groove forms are designed, which can not only realize the effective connection during the laser melting deposition process, but also prevent the powder from entering the closed cavity The impact of the cavity thus improves the stability of the structure. The main requirements are as follows:

[0025] Scope of application: aluminum alloy, stainless steel, titanium alloy, superalloy and other metal structures;

[0026] Applicable structures: large-scale structures, structures that require post-processing connections;

[0027] Laser type: spot diameter and welding are different;

[0028] Power: 1000W-4000W;

[0029] Spot diameter: 200μm;

[0030] Material addition method: powder feeding;

[0031] Powder particle size: 15-100μm;

[0032] Joint form: butt joint structure;

[0033] Margin requirement: ...

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PUM

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Abstract

The invention discloses a connecting method and device for large-size light 3D printing metal structures. The method is achieved based on the connecting device. The device comprises a powder feeding device, a powder feeding nozzle, a laser device, a galvanometer and a base table. Workpieces are arranged on the base table, and a selective laser melting method is adopted for printing at workpiece connecting positions. Printing of the large-size 3D printing metal structural parts currently limited by the equipment size can be achieved, through the combination of a designed connector structure manner and a laser melting deposition method, the metal structural parts are connected, and use and popularization of the large-size selective laser melting structural parts are facilitated.

Description

technical field [0001] The invention belongs to the technical field of 3D printing matching, and in particular relates to a connection method and device for large-scale and lightweight 3D printing metal structures. Background technique [0002] Selective laser melting technology is currently the most widely used additive manufacturing technology, and it is also an effective method to realize the manufacture of lightweight structures such as lattice structures and bionic structures. However, limited by the size of the vacuum chamber of the additive manufacturing equipment, the selective laser melting additive technology cannot manufacture large-scale components, which limits the application of this technology in the field of large lightweight structures. There are currently two solutions, namely, the development of large-scale additive manufacturing equipment or the method of splicing multiple additive manufacturing components. Among them, large-scale additive manufacturing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06B22F3/105B33Y10/00
CPCB22F7/064B33Y10/00B22F10/00B22F10/36B22F12/49B22F10/66B22F10/25B22F10/28B22F12/53Y02P10/25
Inventor 张峰柏久阳王国强陈光强戴维弟胡伟叶
Owner NANJING CHENGUANG GRP