A dual-beam slm forming method and system that takes into account forming efficiency and forming quality

A forming quality, double-beam technology, applied in the direction of improving process efficiency, improving energy efficiency, additive processing, etc., can solve the problems of difficult control of metallurgical defects of parts, low forming efficiency, easy deformation and cracking of parts, etc., to reduce residual stress , improve forming efficiency and prevent deformation and cracking

Active Publication Date: 2022-07-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a dual-beam SLM forming method and system that takes into account both forming efficiency and forming quality, aiming to solve the common problem of forming efficiency deviation when forming metal parts with existing SLM technology. Low, difficult to control internal metallurgical defects of parts, easy deformation and cracking of parts

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  • A dual-beam slm forming method and system that takes into account forming efficiency and forming quality
  • A dual-beam slm forming method and system that takes into account forming efficiency and forming quality
  • A dual-beam slm forming method and system that takes into account forming efficiency and forming quality

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Embodiment 1

[0051] The present embodiment takes the processing of the TC4 titanium alloy pre-swirl nozzle as an example to illustrate the forming method of the present invention, and the specific steps are:

[0052] (1) Divide the digital model of the pre-swirl nozzle into a high-precision forming area and a high-efficiency forming area, and slice the digital model to obtain S-layer slice layer information (S≥2); wherein, the high-precision forming area is the nozzle , this area requires high precision, and it is difficult to carry out subsequent machining; the remaining areas can be formed by high-power laser beams, and the accuracy requirements are low, allowing subsequent machining, so it is set as a high-efficiency forming area;

[0053] (2) Apply laser selective melting to the metal powder bed according to the slice information of the first layer:

[0054] If the slice layer contains only high-precision forming areas, use figure 2 Shown is a low-power, small-spot laser beam shaping...

Embodiment 2

[0059] This embodiment takes the processing of the AlSi10Mg aluminum alloy curved surface liquid-cooled cold plate as an example to illustrate the forming method of the present invention, and the specific steps are:

[0060] (1) Divide the digital model of the liquid-cooled cold plate into a high-precision forming area and a high-efficiency forming area, and slice the digital model to obtain S-layer slice layer information (S≥2), where the high-precision forming area is The antenna pre-installation surface of the cold plate has high dimensional accuracy requirements and is difficult to carry out subsequent machining; the remaining areas can be formed by high-power laser beams, and the accuracy requirements are low, allowing subsequent machining, so it is set as a high-efficiency forming area;

[0061] (2) Apply laser selective melting to the metal powder bed according to the slice information of the first layer:

[0062] If the slice layer contains only high-precision forming ...

Embodiment 3

[0067] In this embodiment, the processing of the GH4169 nickel-based superalloy aero-engine cabin section is taken as an example to illustrate the forming method of the present invention, and the specific steps are as follows:

[0068] (1) Divide the digital model of the engine cabin into a high-precision forming area and a high-efficiency forming area, and slice the digital model to obtain S slice layer information (S≥2), where the high-precision forming area is the cabin The epitaxial cooling pipeline of this section has a complex structure and is difficult to be formed by high-power lasers, and the rest of the area is a high-efficiency forming area;

[0069] (2) Apply laser selective melting to the metal powder bed according to the slice information of the first layer:

[0070] Use 1 beam if the slice layer contains only the high-precision forming area figure 2The energy distribution shown is a Gaussian mode of medium power, medium spot laser beam shaping, where the laser...

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Abstract

The invention belongs to the technical field of advanced manufacturing, and specifically discloses a double-beam SLM forming method and system that takes both forming efficiency and forming quality into consideration. High-precision forming of parts, using high-power, large-spot laser beam with energy distribution in a ring or flat-top mode to achieve high-efficiency forming of metal parts, so as to achieve high-efficiency and high-quality SLM forming of metal parts. The invention can realize the close metallurgical combination of the high-efficiency forming area and the high-precision forming area, effectively suppress the formation of internal metallurgical defects such as insufficient fusion and large particle inclusions, significantly reduce the residual stress of the forming material, and realize the high efficiency of metal parts. High quality SLM forming.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing, and more particularly, relates to a dual beam SLM forming method and system that takes both forming efficiency and forming quality into consideration. Background technique [0002] Selective Laser Melting (SLM) is the mainstream metal 3D printing technology at this stage. It uses a scanning galvanometer to drive a high-energy-density laser beam, and applies selectivity to the pre-laid metal powder bed layer by layer according to the two-dimensional slice data of the part. Melting and stacking to achieve mold-free, short-cycle, near-net-shape of various complex metal parts. [0003] However, the existing SLM technologies usually use medium / low power (≤1000W) and medium / small spot (≤200μm) laser beams, which have the following deficiencies: 1) The selection of important parameters such as scanning speed, scanning spacing, and layer thickness restricts each other. , which seriously l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y30/00
CPCB22F3/003B33Y10/00B33Y30/00Y02P10/25
Inventor 曾晓雁魏恺文李祥友刘梦娜黄高邓金凤
Owner HUAZHONG UNIV OF SCI & TECH
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