Toolpaths programming in an intelligent Step_NC manufacturing context

• Autorzy: Laguionie R. , Rauch M. , Hascoet J.-Y.
• Języki publikacji: EN

Abstrakty

EN

The current language for CNC programming is G-code which dates from the beginning of the eighties with the norm ISO 6983. With the new technologies, G-code becomes obsolete. It presents drawbacks that create a rupture in the numerical chain at the manufacturing step. A new standard, Step_NC, aims to overtake these lacks. A Step_NC file includes all the information for manufacturing, as geometry description of the entities, workplan, machining strategies, tools, etc. For rough pocket milling, the ISO norms propose different kind of classical strategies as bidirectional, parallel or spiral contour, etc. This paper describes a new way of toolpath programming by the repetition of a pattern all along a guide curve. It presents several advantages as building fastness and easiness. The integration of pattern strategies in Step_NC standard is an other step for the development of these strategies but also for the enrichment of Step_NC possibilities. A complete Step_NC numerical chain was built, integrating these pattern strategies. The implementation of this approach of building pattern strategies was made by the development of tools for the complete manufacturing cycle, from the CAD file to the machined part. Several application cases were experimented on machine tool to validate this approach and the efficiency of the developed tools.

Słowa kluczowe

EN

Step_NC; toolpath generation; pattern strategy

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2008
• Tom: Vol. 8, No. 1
• Strony: 33--43
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Laguionie R.

• Institut de Recherche en Communication et Cybernétique de Nantes, France

autor

Rauch M.

• Institut de Recherche en Communication et Cybernétique de Nantes, France

autor

Hascoet J.-Y.

• Institut de Recherche en Communication et Cybernétique de Nantes, France

Bibliografia

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• [2] HASCOET J.Y., RAUCH M., SUH S.H., Relevance of Step-Nc standard for high level toolpaths generation. In: International Conference on High Speed Milling. 2007, San Sebastian (Spain).
• [3] STEP TOOLS INC., STEP-NC demonstrated at JPL. Manuf. Eng., Vol. 130(3), 2003, 34-35.
• [4] ISO_6983, International Standard Organization: Numerical control of machines - Program format and definition of adress words.
• [5] ISO_ 10303-238, International Standard Organization: Industrial automation systems and integration — Product data representation and exchange -- Part 238: Application protocol: Application interpreted model for computerized numerical controllers, ISO TC I84/SC4/WG3 NI534.
• [6] ISO_ 14649-10, International Standard Organization: Industrial automation systems and integration – physical device control - data model for computerized numerical controllers - Part 10 : general process data, ISO TC 184/SC1/WG7/FDIS.
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