Vector sintering system and additive manufacturing method

An additive manufacturing and vector technology, which is applied in the field of sintering film-coated powder by powder layer-by-layer vector heating, to avoid thermal stress, save processing time, and improve utilization.

Active Publication Date: 2013-10-23
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The invention proposes an additive manufacturing method based on powder layer-by-layer vector sintering technology, which solves the pro

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  • Vector sintering system and additive manufacturing method
  • Vector sintering system and additive manufacturing method
  • Vector sintering system and additive manufacturing method

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Embodiment Construction

[0021] The invention proposes an additive manufacturing method, which uses a vector heating method to sinter the film-coated powder layer by layer. Taking the sintering of cast aluminum coated sand as an example below in conjunction with the accompanying drawings, the present invention will be further discussed.

[0022] Such as figure 1 Shown is the flow chart of the additive manufacturing process based on vector sintering technology, which can efficiently produce high-precision coated sand parts corresponding to the geometry of the CAD model without the need for molds.

[0023] figure 2 The schematic diagram of the vector sintering system is explained. The main part of the sanding module is the sanding vehicle 1, which is automatically filled with coated sand before each sanding. Two rows of heating units 2 are symmetrically distributed with the sanding vehicle through brackets. , constitutes a vector heating module, and each heating unit is controlled by a computer to o...

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Abstract

The invention provides an additive manufacturing method based on a vector sintering technology, and the method is realized through a vector sintering system. The system comprises a powder paving module, a vector heating module, a laser processing module and a temperature control module. When a part is processed, a coated powder body is preheated to a specific temperature not exceeding a sintering temperature through the temperature control module; a working cavity is descended by the thickness of a layer; while the powder paving module is used for finishing a powder paving operation in a moving process, the vector heating module at the rear end of the powder paving module is used for performing region selection sintering on powder in the part to obtain a plane sintering region covering a cross section slightly larger than a single-layer part; the laser processing module is used for scanning the powder body at the contour line part and invalidating the adhesion to obtain an accurate part boundary contour of the layer; after the operations of layer-by-layer descending, powder paving, vector sintering and contour invalidation scanning are performed, the stacking operation is performed to obtain a sintered part slightly larger than a part CAD (computer-aided design) model, the overall body is baked and reinforced, and few peripheral wastes are removed along a separation surface obtained by contour invalidation to obtain a final part.

Description

technical field [0001] The invention relates to an additive manufacturing method based on vector sintering technology, in particular to a method for sintering film-coated powder by adopting powder layer-by-layer vector heating. Background technique [0002] Additive Manufacturing (AM) technology, also known as rapid prototyping technology, is a technology that uses the method of gradually accumulating materials to manufacture solid parts. Compared with the traditional material removal-cutting technology, it is a "bottom-up" Manufacturing method. Since the US 3D company launched the first commercial SLA rapid prototyping machine in 1988, there have been more than a dozen different forming systems, of which there are four basic types of main processes: stereolithography (Stereolithography Apparatus, referred to as SLA method), Laminated Object Manufacturing (LOM for short), Selective Laser Sintering (SLS for short) and Fused Deposition Manufacturing (FDM for short). Among th...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 姚山毛庆凯杨通赵枢明
Owner DALIAN UNIV OF TECH
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