Modeling method for dynamic machining features of complex curved surface

A curved surface processing and dynamic processing technology, applied in the field of CAD/CAM, can solve problems such as the inability to meet the adaptive processing of curved surfaces, and the dependence of programming on manual labor.

Active Publication Date: 2015-01-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current programming of complex curved surfaces relies on manua

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  • Modeling method for dynamic machining features of complex curved surface
  • Modeling method for dynamic machining features of complex curved surface
  • Modeling method for dynamic machining features of complex curved surface

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Embodiment Construction

[0038] The following is a detailed description of the technical solution of the present invention in conjunction with the accompanying drawings.

[0039] 1. Define the secondary data structure of the complex surface dynamic processing feature. Complex surface dynamic processing features include processing intermediate state feature level and surface processing sub-feature level, such as figure 2 shown. Each processing stage in the defined surface processing scheme corresponds to a processing intermediate state feature I i , for example, the surface machining plan contains three stages of roughing, semi-finishing and finishing, then the surface contains three processing intermediate state features of roughing, semi-finishing and finishing features, so

[0040] S = ∪ i n I i

[0041] I i The geometric information contained in is the geometric s...

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Abstract

The invention provides a modeling method for dynamic machining features of a complex curved surface and belongs to the technical field of CAD/CAM. The modeling method for the dynamic machining features of the complex curved surface comprises the steps that firstly, according to a selected machining scheme, machining intermediate state features corresponding to all machining stages in the curved surface machining scheme are defined; secondly, curved surface machining area division is conducted on each intermediate stage feature according to selected machining devices, cutting parameters and machining optimization objects of different machining stages, so that curved surface machining sub-features are obtained. According to the modeling method for the dynamic machining features of the complex curved surface, FunctionBlock is used as an information carrier of the curved surface dynamic machining features, when manufacturing resources are changed, an event triggering-responding mechanism of the FunctionBlock is utilized, a defined curved surface feature modeling method in the FunctionBlock is automatically called, and the intermediate state features of curved surface machining and curved surface machining sub-features contained by the intermediate state features are updated in real time. By the adoption of the modeling method for dynamic machining features of the complex curved surface, the curved surface machining features can be dynamically updated according to the change of the manufacturing resources, and the modeling method is the key technology for achieving complex curved surface self-adaption optimized machining.

Description

technical field [0001] The invention relates to a CAD / CAM technology, in particular to a CAD / CAM technology for processing complex curved surfaces, in particular to a dynamic processing feature modeling method for complex curved surfaces. Background technique [0002] With the continuous improvement of aerodynamic performance requirements, a large number of free-form surface parts appear in aerospace, automobile, ship and other products, and the complexity of the curved surface continues to increase, which brings great challenges to manufacturing. At present, the free-form surface NC machining programming mainly adopts commercial CAM software, which is mainly based on manual experience. Therefore, the programming cycle is long, and the stability and standardization are poor, which often causes problems in machining accuracy and surface quality. And the current research on surface machining trajectory generation methods usually regards the entire surface as a processing area,...

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Application Information

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IPC IPC(8): G05B19/4099
CPCG05B19/4099G05B2219/45136
Inventor 李迎光刘旭李强马斯博马飞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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