Method for laser-computer modeling

FIELD: technology for layer-wise shape generation as part of accelerated modeling systems based on laser-computer modeling.

SUBSTANCE: in the method by means of three-dimensional geometric modeling system a volumetric model of product is formed, split onto thin transverse layers and layer-wise synthesis of solid model is performed, while transverse layers Coefficient are made of different thickness A, which is determined from appropriate mathematical formula.

EFFECT: less time required for manufacture of solid model.

1 dwg

 

The invention relates to a compact intellectual production, in particular to the technology layer forming part of a system of rapid prototyping on the basis of laser-computer layout.

The known method of laser-computer modeling, including the creation of three dimensional geometric model of the product, which splits into thin transverse layers; the control program implements on the actuator trajectory flat sections, connecting the last in the three-dimensional model (see Svistunov. Technology layer-by-layer synthesis in the creation of three dimensional models for production storage. W-l "Bulletin of engineering", 1998, No. 1, p.20-28).

The known method of laser-computer modeling, including the creation by the system of three-dimensional geometric modeling of the virtual three-dimensional model of the future product, its breakdown into thin transverse layers and layer-by-layer synthesis of solid models (see Mulrow. Gemma-3D and rapid prototyping. W-l "CAD and graphics", 2002, №6, p.45-47).

In the known methods to ensure the accuracy of dimensions, it is necessary that the thickness of the layer was equal to or less than half the magnitude of the tolerance on the nominal surface profile model, and this leads to an increase in the number of layers and lots of time for manufacturing the solid model.

The goal is to reduce the time for manufacturing the solid model.

This object is achieved in that in the method of laser-computer modeling, including the creation by the system of three-dimensional geometric modeling of the virtual three-dimensional model of the future product, its breakdown into thin transverse layers and layer-by-layer synthesis of solid models, shear layers perform different thickness And which is defined by the formula:where h is the height of the irregularities; ϕ - the angle of elevation of the nominal surface profile.

The claimed method is characterized by the following salient features: "transverse layers perform different thickness a and the thickness of the layer is determined by the formula:where h is the height of the irregularities; ϕ - the angle of elevation of the nominal surface profile".

Produced research on the patent and scientific literature revealed a number of technical solutions for a similar purpose, however, the distinctive features of the proposed method is not in them. From here it is possible to draw a conclusion on the conformity of the proposed method the eligibility criteria of the invention. The feasibility of the proposed method is illustrated in the drawing, which schematically shows the model with disaggregated into thin layers and calculation of the thickness of the layer.

<> Using system three-dimensional geometric modeling (damn. not shown because they are well known) create a virtual volumetric model of the future product, and then break it up into layers and produce a layer-by-layer synthesis of solid models using a laser (not shown, as is also well known). The thickness And layers are selected from the conditions under whichwhere h is the height of the irregularities; ϕ - the angle of elevation of the nominal surface profile of SPE. Resulting in the actual profile of AF within the field of tolerance of PD.

The method of laser-computer modeling, including the creation by the system of three-dimensional geometric modeling of the virtual three-dimensional model of the future product, its breakdown into thin transverse layers and layer-by-layer synthesis of solid models, characterized in that the layers perform different thickness And which is defined by the formula:

,

where h is the height of the irregularities;

ϕ - the angle of elevation of the nominal surface profile.



 

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