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A device and method for monitoring molten pool in additive manufacturing process based on multi-band coupling

A technology of additive manufacturing and monitoring devices, which is applied in the direction of measuring devices, material analysis through optical means, and material analysis, etc., to achieve the effects of increasing sampling frame rate, improving resolution, and reducing redundant data

Active Publication Date: 2018-09-25
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

This solves the technical problems existing in the existing PBF molten pool monitoring

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  • A device and method for monitoring molten pool in additive manufacturing process based on multi-band coupling
  • A device and method for monitoring molten pool in additive manufacturing process based on multi-band coupling
  • A device and method for monitoring molten pool in additive manufacturing process based on multi-band coupling

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0049] see figure 1 , The embodiment of the present invention provides a multi-band coupling-based powder bed melting additive manufacturing process melt pool monitoring device and method, which is composed of a processing unit, a signal acquisition unit, a data processing unit 17 and a data storage unit 18 . The coupling of three different band optical paths of processing optical path, lightin...

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Abstract

The invention discloses a molten bath monitoring device of an additional material manufacturing process based on multiband coupling and a method. The device is composed of a processing unit, a signalcollecting unit, a data processing unit, and a data storage unit. By means of a multi-wavelength refracting-diffracting mixed f-theta focus lens, a dichroscope and other optical elements, three lightpaths (laser processing light path, laser lighting path and a bath image information collecting light path) at different wave sections can be coaxially coupled at outside of a shaping cavity, thus therapidly moved small bath can be tracked and collected in real time; besides, the bath image and the characteristic information can be rapidly calculated and stored in multiple grades through the dataprocessing unit and the data storage unit; the long-time monitoring of the bath during the fusion additional material manufacturing process of a powder bed is realized. The device can realize the high-precision and full-flow monitoring during the long time working process of the fusion additional material manufacturing of the powder bed; the technical condition is created for the evaluation of the additional material manufacturing and shaping quality and regulation of technical parameters.

Description

technical field [0001] The invention belongs to the technical field of on-line detection of additive manufacturing, and more specifically relates to a multi-band coupling-based melting pool monitoring device and method for powder bed melting additive manufacturing process. Background technique [0002] Powder bed fusion (Powder bed fusion, PBF) is an additive manufacturing (Additive manufacturing, AM) technology. It is based on the principle of "discrete-stacking" and can directly manufacture powder materials into parts with a density close to 100% according to three-dimensional data. PBF technology has high forming precision and small follow-up processing, which is very suitable for the forming and manufacturing of complex shape components, especially for complex special-shaped structures (such as complex inner runners, lattice sandwiches and intersecting surfaces, etc.) that cannot be manufactured by traditional methods. Component. In addition, PBF has a fast scanning spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/85B22F3/105
CPCB22F3/105G01N21/01G01N21/85Y02P10/25
Inventor 殷杰杨亮亮王泽敏陈昌棚曾晓雁朱海红郭连波彭刚勇
Owner HUAZHONG UNIV OF SCI & TECH
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