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Layering method for overhanging feature structure in added material manufacturing and added material manufacturing method thereof

A feature structure, additive manufacturing technology, applied in the field of additive manufacturing, can solve problems such as high roughness, collapse, particle adhesion, etc., to achieve the effect of improving forming quality

Active Publication Date: 2019-03-22
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The invention provides a layering method for overhanging characteristic structures in additive manufacturing and an additive manufacturing method thereof; realizes the additive manufacturing process for overhanging characteristic structures, and solves the problem of relatively large overhanging angles in existing equal-thickness processing For large models, the forming quality and precision of the structural surface are poor, and the roughness is high, which is prone to the problems of particle adhesion and collapse

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  • Layering method for overhanging feature structure in added material manufacturing and added material manufacturing method thereof
  • Layering method for overhanging feature structure in added material manufacturing and added material manufacturing method thereof

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Embodiment Construction

[0019] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] The present invention provides a layering method for overhanging features in additive manufacturing such as figure 1 As shown, its implementation process is as follows:

[0021] Step S1, data processing is performed on the STL format file of the model, the triangular surface information of the model is extracted, and the vector information of the triangular surface is converted into the angle value of the triangular surface in the Z direction; the above-mentioned angle in the Z direction The value is the forming angle α between the triangular patch and the XY plane it is on.

[0022] Step S2, according to the initial layer thickness d, obtain the current layer height value H.

[0023] Step S3, counting the forming angles α of all triangular faces and their corresponding layer heights H; where 0≤α≤90°.

[0024...

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Abstract

The invention discloses a layering method for an overhanging feature structure in added material manufacturing and an added material manufacturing method thereof. The layering method comprises the following steps: triangular surface piece information of a model is obtained; a layer thickness is set; a layering height of a machining layer in a Z direction is determined according to the layer thickness; the layering height is compared with a Z directional section of a space triangular surface piece, and a forming angle alpha between the triangular surface piece and an XY plane thereof is obtained; a changed layer thickness is a product of a layer thickness coefficient and a preset layer thickness through calculation; the changed layer thickness is used as the preset layer thickness, and a corresponding changed layer thickness is calculated according to the process; and when the changed layer thickness is equal to the corresponding preset layer thickness, a layering height of a componentand a corresponding layering number are obtained according to the layer thickness. The layering method realizes the added material manufacturing process of the overhanging feature structure, and solves the problems of weaker surface forming quality and precision, higher roughness and easy generation of particle attachment and collapse in traditional equal-thickness machining of models with largeroverhanging angles.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing; in particular, it relates to a layering method for overhanging feature structures in additive manufacturing; and also relates to an additive manufacturing method. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, AM) is an advanced manufacturing that integrates computer science, optics, material science and other disciplines and accumulates 3D CAD models of parts into parts or prototypes with certain structures and functions through manufacturing equipment. Technology, also known as rapid prototyping (Rapid prototyping), 3D printing technology (3Dprinting) and so on. Parts of any shape can be quickly manufactured on one additive manufacturing equipment, including parts with complex structures that are difficult to manufacture with high efficiency and low cost by traditional processing equipment; without the need for tools and tooling in tradit...

Claims

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Application Information

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IPC IPC(8): B29C64/386B33Y50/00G06F17/50
CPCB29C64/386B33Y50/00G06F30/20
Inventor 魏正英张树哲向羽李俊峰杨理想姜立昊
Owner XI AN JIAOTONG UNIV
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