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Soft abrasive flow field testing method based on level set

A test method and level set technology, applied in the field of abrasive flow processing, can solve the problems of low calculation accuracy of the soft abrasive flow field and the inability to accurately obtain the best processing state.

Active Publication Date: 2012-02-22
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] In order to overcome the disadvantages of low calculation accuracy of the existing soft abrasive flow field and the inability to accurately obtain the best processing state, the present invention provides a soft abrasive particle based on level set that improves the calculation accuracy and accurately obtains the best processing state. Flow Field Test Method

Method used

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  • Soft abrasive flow field testing method based on level set
  • Soft abrasive flow field testing method based on level set
  • Soft abrasive flow field testing method based on level set

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] refer to Figure 1 to Figure 5 , a soft abrasive flow field test method based on level set, the test method comprises the following steps:

[0049] 1) By combining with the fluid Navier-Stokes equation, the motion equation of the level set function of the soft abrasive flow is established;

[0050] 2) Discretization and projection of the space: replace the original continuous space with a set of finite discrete points, and at the same time convert the divergence into a divergence-free quantity through projection;

[0051] 3) discretize the time;

[0052] 4) The combination of level set function and VOF function is iterated;

[0053] 5) Reconstruction of the distance function: Reconstruction is to construct the distribution of the original function with a certain precision under the condition of known function segment average value. Due to the internal effect ...

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Abstract

A soft abrasive flow field testing method based on a level set comprises the following steps: 1) establishing an equation of motion of the level set function of the soft abrasive flow by combining a fluid Navier-Stokes equation; 2) discretizing and projecting space; 3) discretizing time; 4) iterating combination of the level set function and function of volume of fluid model; 5) reconstructing the distance function; and 6) testing the soft abrasive flow field: better analyzing the flow field characteristics to find the best machining state by adopting the principle of the level set method, namely effectively capturing topological variation of the interface. The testing method improves the computational accuracy and accurately finds the best machining state.

Description

technical field [0001] The invention relates to the field of abrasive flow processing, in particular to a flow field testing method in toolless processing of structured surfaces of soft abrasive flow. Background technique [0002] At present, the mold field has higher and higher requirements for the roughness of the structured surface. For example, precision injection molds not only have extremely high requirements for the roughness of the mold surface corresponding to the surface of the injection molded part, but also have high requirements for the roughness of the injection runner. Require. For structured surfaces with small size or special geometry, it is difficult to use tools for contact finishing, such as polishing or grinding, whether it is automated or manual processing. There is no effective way to solve this problem, and there is a lack of in-depth research. . In view of the large amount of mold applications, its manufacturing level directly affects the overall l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00G06F19/00
Inventor 计时鸣翁晓星谭大鹏
Owner ZHEJIANG UNIV OF TECH
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