Partition scanning method for thin-walled part additional material manufacture

A technology of additive manufacturing and scanning method, applied in the field of additive manufacturing, can solve the problems of large temperature gradient, warping deformation, large stress of forming thin-walled parts, etc., to improve strength, reduce shape error, and simple control. Effect

Active Publication Date: 2018-11-27
HEFEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

Using powder bed additive manufacturing technology to form parts, conventional scanning methods mainly include parallel line scanning, checkerboard scanning, equidistant line scanning and other scanning methods. When using these scanning processing methods, due to the high energy beam in a forming layer The difference in the sequenc...

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  • Partition scanning method for thin-walled part additional material manufacture
  • Partition scanning method for thin-walled part additional material manufacture
  • Partition scanning method for thin-walled part additional material manufacture

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Embodiment Construction

[0045] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0046] A partition scanning method for additive manufacturing of thin-walled parts, mainly comprising the following steps:

[0047] (1) According to the layered contour data of each layer slice obtained by layered slices of the thin-walled parts to be processed, calculate the central axis transformation of the boundary of each solid area; figure 1 , 4 , The thin solid line shown in 8 is the slice outline, and the thick solid line is the central axis of the boundary of the solid region;

[0048] (2) For the transformation of the central axis of each solid area boundary, according to the size of the area affected by the central axis edge, the central axis edge with less influence is cut; for example figure 2 , 5 , the cutout central axis shown in 9;

[0049] (3) Determine whether to divide the solid area into multiple main areas and connectio...

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Abstract

The invention discloses a partition scanning method for thin-walled part additional material manufacture. According to all entity areas of layering and slicing of a to-be-machined thin-walled part, inaccordance with the medial axis transformation of the boundary of each entity area, whether the area is divided into a plurality of main areas and a connecting area is determined; scanning paths arecalculated for the main areas and the connecting area, wherein a zigzag scanning path is adopted in the main areas, so that a fused powder material is scanned along a scanning line and a slicing and layering contour line finally through a high energy beam to form a thin-walled part slicing layer entity, so that the whole thin-walled part is formed. The control of a processing process is simple, residual stress and distribution thereof can be controlled, forming errors and buckling deformation of the thin-walled part are reduced, and the density of the thin-walled part and the strength thereofare improved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a partition scanning method for additive manufacturing of thin-walled parts. Background technique [0002] Thin-walled parts refer to lightweight structural parts composed of various thin plates (shells) and ribs, generally made of aluminum alloy, titanium alloy and other materials, which have outstanding advantages such as light weight and high strength, and are increasingly widely used in engineering, especially Thin-walled structures are commonly used in aerospace products. Thin-walled parts are usually processed by turning, milling, grinding, fly-cutting, etc., the material utilization rate is very low, and due to the characteristics of thin-walled parts such as poor rigidity and large machining allowance, the processing technology is poor. Under the action of cutting force, clamping force, cutting chatter and other factors, problems such as deformation, insta...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F5/00B33Y50/02B33Y80/00
CPCB22F3/105B22F5/00B33Y50/02B33Y80/00Y02P10/25
Inventor 李维诗郭一佟于连栋夏豪杰
Owner HEFEI UNIV OF TECH
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