Friction stir additive manufacturing method for metal materials

A friction stir and additive manufacturing technology, applied in the direction of manufacturing tools, metal processing equipment, non-electric welding equipment, etc., can solve problems such as large internal stress, deformation and cracking mechanical properties of large components, and difficulty in using high-energy beams. Easy implementation and excellent performance

Inactive Publication Date: 2015-12-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the additive manufacturing method based on high-energy beam "melting" has problems of large internal stress (solidific

Method used

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  • Friction stir additive manufacturing method for metal materials

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0020] figure 1 An embodiment of the present invention is shown, and the specific operation includes the following steps:

[0021] (1) Two layers of metal plates 1 are laid on the numerically controlled mobile platform 2, and the friction stir head 4 is used to realize the overlap between the two layers of plates, and the overlapping area forms a single-layer profile of the metal member;

[0022] (2) The friction stirring head is replaced with a cutting tool in the tool magazine, and the plates in the friction stirring area and non-friction stirring area are separated by cutting, and the separated plates are not taken away at the same time, as a support for subsequent friction stirring;

[0023] (3) The friction stirring head is raised by one sheet thickness, and a layer of meta...

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Abstract

The invention discloses a friction stir additive manufacturing method for metal materials and belongs to the field of additive manufacturing (3D printing) of metal materials. The method is based on the technical principle of layer-by-layer accumulation of additive manufacturing, a friction stir head stirs two layers of metals to connect the two layers of metals, after a certain number of layers are accumulated through layer-by-layer stirring and connection, a cutter is switched for cutting to make plates of a friction stir part and a non-friction stir part separated, and the separated plates are not taken away but used as a support for subsequent friction stir. The materials are not melted in the welding process through the friction stir welding solid material connection technology, so that metal metallurgical defects such as pores and cracks are avoided, and the strength of a connection area is high. Meanwhile, welding energy input is low, and workpieces are low in stress and small in deformation after being welded. By means of the technical advantages of low stress and high performance of the friction stir welding solid connection, the low-cost and high-performance rapid manufacturing of large non-ferrous metal integral components like aluminum alloy can be achieved.

Description

technical field [0001] The invention belongs to the field of metal material additive manufacturing (3D printing), and in particular relates to a metal material friction stir additive manufacturing method. Background technique [0002] Metal components such as large-scale integral aluminum alloys are widely used in modern aerospace vehicles, and play an important role in improving the reliability and lightweight of aircraft. To ensure high performance, these large components are usually manufactured using forging methods. However, the heavy forging equipment and molds required to manufacture large integral components by forging method are expensive, the process is complex, the production cycle is long, and the material utilization rate is low (<10%), which makes the preparation of large integral aluminum alloy components difficult and expensive. [0003] Additive manufacturing technology is expected to realize low-cost and rapid manufacturing of metal components such as l...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/1225
Inventor 刘长猛邹胜科马树元
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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