SolidWorks' Secondary Development Based On STEP-NC

The new CNC data model is based on the development of manufacturing informatization. The traditional CNC interface based on ISO 6983(1982) , so-called G&M code, Now it can not keep up with the rapid development of NC technology. Therefore STEP standard is researched and established, which is a uniform data model independent of any special system, for all kinds of products, covered the whole lifecycle. Furthermore ISO14649 (STEP-NC), a new CNC standard, was created to extend STEP to the field of CNC. Now STEP-NC is still a perfect CNC interface standard, which will supply a wide development space to intelligentize of NC machining, and make a close relationship between the product design and manufacture. And the new CNC standard will go ahead with a further influence to manufacturing automation.In the process of designing programme,we emphasize the data source of STEP-NC and the format of describing these data in STEP-NC file.Based on analyzing STEP-NC standard, this paper gets the geometric data by reading STEP AP214 file, and manufacturing data from SolidWorks,finally writes these information to STEP-NC file in the format defined by STEP-NC technical protocol, that is AP238.And then we finish the STEP-NC file.This system is used like this: drawing the part in SolidWorks, and...