Numerical control processing method and numerical control processing system for realizing T spline model based on OCC

Abstract

The invention provides a numerical control processing method and a numerical control processing system for realizing T spline model based on OCC. The numerical control processing method comprises the steps of obtaining a T spline data file, generating a T spline model according to the T spline data file; receiving a processing parameter which is input by a user, and generating a processing tool path according to the processing parameter through an equal residual height tool path generating method; determining processing error and interference information of the processing tool rail according to the processing parameter through a cutting simulation algorithm; if the machining error is smaller than a preset value and no interference information exists, generating a processing code according to the processing parameter and the processing tool path; and performing numerical control processing on the T spline sample according to the processing code. Through constructing CAM software which supports T spline model processing and simulation based on OCC, functions such as modeling, displaying and data exchange in the OCC can be directly called, thereby supplying a processing simulation function, realizing processing error and interference condition analysis, supplying basis for determining whether the tool path is qualified, and improving efficiency of a numerical control processing solution for generating the T spline model.

Description

Technical field [0001] The invention relates to numerical control processing technology, in particular to a numerical control processing method based on OCC (Open CASCADE) to realize a T-spline model. Background technique [0002] T-spline technology is a new modeling method that has emerged in recent years, which can represent complex topological models on a single surface and avoid redundant control vertices. It has unparalleled advantages over traditional curved surfaces in terms of modeling, and is widely used in non-parametric design, film and animation, and other geometric analysis fields. At present, T-Splines has launched a Computer-Aided Design (CAD) kernel based on T-spline modeling, supported by Rhino3d and Solidworks in the form of plug-ins, and adopted by Fusion360, which can be used to implement T-spline models. Modeling. [0003] In the prior art, there is no Computer-Aided Manufacturing (CAM) software that supports T-splines. At present, only Fu Jianzhong's team ...

AI Technical Summary

Problems solved by technology

After the tool path is generated, neither the machining error can be displayed nor the interference situation can be judged. The technicians cannot judge whether the tool path is qualified. They can only convert the T-spline model into a subdivision model, and then use Vericut (a CNC machining tool developed by CGTECH in the United States) simulation system) and other simulation software for simulation analysis, which is very inconvenient

Therefore, the NC machining of the existing T-spline model needs to be improved

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