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CAD/CAM/CNC closed-loop control method based on dynamic feature model

A technology of dynamic features and models, applied in the direction of program control, computer control, comprehensive factory control, etc., can solve problems such as not affecting the processing quality and efficiency, and achieve the effect of improving the technological level and expressing rich information.

Active Publication Date: 2015-06-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to invent a CAD / CAM / CNC closed-loop control method based on a dynamic feature model for the problem that CAD / CAM / CNC can not be effectively integrated in the existing CNC machining closed-loop control process method and affect the processing quality and efficiency.

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  • CAD/CAM/CNC closed-loop control method based on dynamic feature model

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Such as Figure 1-5 shown.

[0031] A CAD / CAM / CNC closed-loop control method based on dynamic feature model, its framework and flow chart are as follows figure 1 As shown, it includes the following steps:

[0032]First, define the geometry information, process information XML file format, and define the NC program format;

[0033] Secondly, feature recognition is carried out in the CAD / CAM software environment, the geometry and attribute information of the processing features are extracted, and then the process decision is made, and then the feature-based NC programming is carried out based on the feature recognition results and process decision results, and the processing operation of the processing features The driving geometry, attribute information, and process information are output to the corresponding XML files, and the tool path inform...

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Abstract

A CAD / CAM / CNC closed-loop control method based on a dynamic feature model is characterized in that an XML is used as a carrier for off-line CAD / CAM data presentation and transmission; a service software unit and a feature software unit are established as an on-line CNC control platform, and the dynamic feature model is used as an integration means for off-line technological preparation and on-line processing control; a multithread programming mode and a finite-state machine method are used for realizing concurrence and triggering of multiple algorithms; a memory sharing method is used as a means for real-time communication between the service software unit and a numerical control system core and between the feature software unit and the numerical control system core. The CAD / CAM / CNC closed-loop control method based on the dynamic feature model effectively realizes CAD / CAM / CNC closed-loop control and is beneficial to the improvement of control level.

Description

technical field [0001] The present invention relates to a numerical control machining technology, in particular to a CAD (Computer Aided Design) / CAM (Computer Aided Manufacturing) / CNC (Computerized Numerical Control) closed-loop control method in the numerical control machining process, specifically a dynamic feature-based CAD / CAM / CNC numerical control processing closed-loop control method of the model. Background technique [0002] Due to its automation and high efficiency, CNC machining is more and more widely used in manufacturing. With the emergence of complex machining workpieces, especially aircraft mechanism components, blisks, blades, etc., which have high precision requirements and are easy to deform, the control of the CNC machining process has become more difficult. In the process of CNC machining, manufacturing resources are constantly changing, such as the performance of machine tools and cutting tools, cutting parameters, and the geometry and properties of wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4099
CPCY02P90/02
Inventor 刘长青李迎光
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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