A Laser Scanning Method for Improving Interlaminar Strength and Reducing Warpage

A technology of laser scanning and laser scanning path, which is applied in the direction of improving energy efficiency, improving process efficiency, processing and manufacturing, etc., can solve the problems of interlayer strength difference, warpage and deformation, etc., to improve interlayer strength and reduce warpage The amount of deformation, the effect of enhanced interconnectivity
CN109047759BActive Publication Date: 2021-04-27NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2021-04-27

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Abstract

The present invention provides a laser scanning method for improving interlayer strength and reducing warping deformation. A powder layer is divided into multiple sub-sections, and each sub-section is scanned in turn, and the laser scanning path angle of each sub-section is compared with that of the adjacent Different, at the same time, the scanning path of at least a part of each sub-section is connected end to end with the scanning path of at least a part of the adjacent sub-section, and after scanning a powder layer, the next powder layer is scanned in the same way until all printing is completed, In this way, due to the continuous change of the scanning path, the thermal stress of adjacent sub-sections is different, so the amount of warping deformation is reduced as a whole, and at the same time, because the scanning path of at least a part of each sub-section is different from the scanning of at least a part of adjacent sub-sections Paths are connected end-to-end, thus enhancing interconnectivity between sub-sections and increasing interlayer strength.
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Description

technical field

[0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a laser scanning method for improving interlayer strength and reducing warping deformation. Background technique

[0002] Additive Manufacturing (AM), commonly known as 3D printing, combines computer-aided design, material processing and forming technology, based on digital model files, and uses software and numerical control system to integrate special metal materials, non-metal materials and medical biomaterials , According to extrusion, sintering, melting, photo-curing, spraying and other ways to accumulate layer by layer, the manufacturing technology of manufacturing physical objects. Compared with the traditional processing mode of raw material removal-cutting and assembly, it is a "bottom-up" manufacturing method through material accumulation, starting from scratch. This makes it possible to manufacture complex structural parts that were restrict...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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