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Integral forming method for overlay film powder in complex shape of geometrical body of disabled laser selection

A technology of complex shape and integral molding, which is applied in the direction of laser welding equipment, energy efficiency improvement, process efficiency improvement, etc., can solve the problems of difficult to manufacture complex parts, low strength, and inability to process powder materials, etc., and achieve the effect of detail protection

Inactive Publication Date: 2007-10-10
DALIAN UNIV OF TECH
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Problems solved by technology

[0013] The invention provides a computer three-dimensional model directly made into three-dimensional solid parts, which is a rapid overall molding method of coated powder based on three-dimensional solid segmentation technology complex shape geometry; retains the advantages of the SLS method and overcomes the low strength of the SLS molded body , The LOM method cannot process powder materials, and the contour failure method is difficult to manufacture complex parts.

Method used

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  • Integral forming method for overlay film powder in complex shape of geometrical body of disabled laser selection
  • Integral forming method for overlay film powder in complex shape of geometrical body of disabled laser selection
  • Integral forming method for overlay film powder in complex shape of geometrical body of disabled laser selection

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Embodiment

[0044] Embodiment: Manufacture "impeller" solid part

[0045] Firstly, the modeling design of the three-dimensional CAD model of the "impeller" and the solid modeling design of the sand box are completed in the computer, and the "impeller" entity is subtracted from the solid model of the sand box through the integrated operation function of the CAD software system, and the "impeller as the Cavity" sand mold three-dimensional geometric model. At this time, there are two solid models of the "impeller" solid model and the sand mold with the "impeller as a cavity" in the computer system, and the union of these two solid models is the entire sand box. According to the needs, select the "impeller" as the target entity of rapid integral molding, and take the sand mold with "the impeller as the cavity" as the object to be broken, and then regularly break the sand mold with the "impeller" as the cavity" into a series of The small stripped body is in the shape of a small cuboid or an a...

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Abstract

A method for forming a whole geometric body with complex shape by covering powder and laser heating includes such steps as dividing the geometric model of whole moulding box into a target body and a body to be broken, decomposing the body to be broken into a series of stripped bodies, generating the 2D profile of target body and the isolating line of said body to be broken to form a tracing for laser heating, heating by laser, to fuse the covered powder, solidifying to become a whole target body and a series of small stripped bodies, and stripping said small stripped bodies by vibration or external force to obtain a whole target body.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping by laser processing, and relates to making a computer three-dimensional model into parts, in particular to a method for integrally forming laser-selected-area-failed integral molding of film-coated powders with complex shapes and geometries. Background technique [0002] Laser rapid prototyping technology is a high-tech manufacturing technology that matured and began to be commercialized in the middle and late 1980s. Laser rapid prototyping technology can quickly convert the computer-aided design model (CAD model) of product parts into physical models, part prototypes or parts. Laser rapid prototyping is directly driven by the CAD model, and the corresponding physical entity can be obtained only by changing the CAD model, which greatly shortens the production cycle from conceptual model design to production of products or samples. [0003] At present, there are three main commercialized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B29C67/00B22F3/105G05B15/02G06F17/50
CPCY02P10/25
Inventor 姚山叶昌科叶嘉楠
Owner DALIAN UNIV OF TECH
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