Method for manufacturing three-dimensional object part by part and layer by layer

A three-dimensional object, layer-by-layer manufacturing technology, applied in the directions of additive manufacturing, process efficiency improvement, energy efficiency improvement, etc., can solve the problems of scrapping three-dimensional objects, and the shape accuracy and dimensional accuracy of three-dimensional objects cannot meet the requirements.

Active Publication Date: 2017-05-17
HUNAN FARSOON HIGH TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Although the selective laser melting technology can manufacture metal parts of any complex shape in principle, there are still many feature surfaces that cannot be completed well in practice, including sharp corners, especially the ov

Method used

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  • Method for manufacturing three-dimensional object part by part and layer by layer
  • Method for manufacturing three-dimensional object part by part and layer by layer
  • Method for manufacturing three-dimensional object part by part and layer by layer

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Embodiment Construction

[0020] In the process of manufacturing metal three-dimensional objects layer by layer using powdered materials, the manufacturing of overhanging surfaces often occurs, that is, layered slices form suspended parts that are not self-supporting. Generally, when the slice thickness is fixed, the greater the length of the suspended part, the smaller the angle formed by the slice and the horizontal plane, which brings more inconvenience to the manufacture of three-dimensional objects. During the manufacturing process, it is necessary to design support to fix the suspended surface so that It does not warp and deform. However, the manufacturing process of the support structure includes the removal process, which will affect the manufacturing accuracy of the three-dimensional object, especially when the support structure is designed on the characteristic surface, it is often difficult to meet the requirements of manufacturing accuracy.

[0021] figure 1 with figure 2 Shown is a three-dim...

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Abstract

Provided is a method for manufacturing a three-dimensional object part by part and layer by layer. Energy beams perform selective scanning on corresponding powder materials layer by layer according to the cross section information, projected to powder layers, of a three-dimensional CAD model of the three-dimensional object, and the three-dimensional object is obtained finally. The method comprises the following steps that the three-dimensional object is cut into a part A and a part B, wherein the sectional area of the part A is S1, and the sectional area of the part B is S2; the part A is manufactured reversely in a layer-by-layer manufacturing mode; and the manufactured part A is put reversely, and the part B is manufactured on the section of the part A in a layer-by-layer manufacturing mode with the powder layers. The method can effectively avoid or reduce the possibility of overhung faces particularly in the manufacturing process of the metal three-dimensional object, thereby improving the precision of the three-dimensional object.

Description

Technical field [0001] The invention relates to a method for manufacturing a three-dimensional object, in particular to a method for manufacturing a metal three-dimensional object. Background technique [0002] The powder bed additive manufacturing technology uses energy beams to selectively scan the spreading layer of the powder material, and the three-dimensional objects are finally obtained by layer-by-layer scanning and solidification accumulation. The scanning position of the energy beam is the corresponding cross-sectional part of the three-dimensional object to be manufactured in the layer. The temperature of the powder material corresponding to this part rises rapidly after the action of the energy beam, and the material is melted instantly and solidified after cooling. After the scanning of a layer is completed, a new layer of powder will be spread on the completed scanning layer, and the cross-sectional position corresponding to the new powder layer will be scanned acco...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCB22F10/00B22F10/80B22F10/385B22F10/28B22F10/40Y02P10/25
Inventor 王小军唐璟宋敏肖朋赖端
Owner HUNAN FARSOON HIGH TECH CO LTD
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