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A Lightweight Method of Digging Holes in 3D Models Based on Function Representation

A lightweight, model-based technology, applied in the field of hollow optimization of 3D printed objects, which can solve problems such as difficulty in accurately describing complex internal structures and unsmooth shape representation.

Active Publication Date: 2021-07-06
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods have problems such as local self-intersection, non-smooth shape representation, and difficulty in accurately describing the internal complex structure.

Method used

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  • A Lightweight Method of Digging Holes in 3D Models Based on Function Representation
  • A Lightweight Method of Digging Holes in 3D Models Based on Function Representation
  • A Lightweight Method of Digging Holes in 3D Models Based on Function Representation

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Embodiment Construction

[0067] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0068] like figure 1 As shown, it is a schematic flow chart of the present invention. This embodiment takes standing stability as an example to illustrate the specific implementation of the present invention. It can be divided into three main steps: 3D model function representation with holes, problem model establishment, and optimization solution:

[0069] (1) 3D model function representation

[0070] In order to obtain the interpolation function representing the inner and outer surfaces of the model, it is necessary to find the weight {a i} and {b i} value. Take the function value f=1 of the external control point, the function value f=-1 of the internal control point, and the function value f=0 of the control point on the model surface. Use the RBF radial basis function to calculate the distance valu...

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Abstract

The invention discloses a light-weight method for digging holes inside a 3D shape based on function representation, and belongs to the field of computer-aided design. First use the function to express and explore the effective shape optimization analytical calculation, and then under the given external conditions, through the construction of the energy function model to design the force structure of the 3D model, the center of mass of the object, the standing stability, the design of the tumbler and the levitation problem. Modeling, and the corresponding discretization form is given; finally, the geometric optimization of the above modeling problems is carried out respectively, and the internal shape of the optimized object is obtained under the given constraints. The invention greatly shortens the design and optimization cycle of this type of hole structure, and can provide the theoretically optimal result. The internal cavity of the model obtained by the invention is smoother, not limited by the number of cavities, the object model has a lower center of mass, more materials are saved, and less time is consumed in design and optimization.

Description

technical field [0001] The invention belongs to the technical field of computer-aided design, engineering design and manufacturing, and relates to a light-weight method of digging holes inside a 3D model based on function representation, which is suitable for the design and optimization of the hollowing of general parts, especially for 3D Hollow optimization of printed objects. Background technique [0002] Internal hollowing is an effective lightweight method that satisfies functional purposes without changing the external shape of the 3D object. This method can greatly reduce the use of materials and manufacturing costs, and is widely used in fields such as environmental protection and material saving. However, the existing methods have problems such as local self-intersection, non-smooth shape representation, and difficulty in accurately describing the internal complex structure. How to avoid the self-intersection problem, and at the same time describe the shape of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/10B29C64/386B33Y50/00G06F119/14G06F119/18
CPCB29C64/386B33Y50/00G06F30/10G06F30/23G06F2111/10G06F2113/10
Inventor 王胜法杨均张龙飞罗钟铉
Owner DALIAN UNIV OF TECH
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