Automatic determination of cutting conditions for NC program generation by reusing machining case data based on geometric properties of removal volume

Abstract

This study proposed a new method to automatically determine cutting conditions for NC program generation by utilizing the similarity of the removal volume extracted from a work material. In the new method, the cutting conditions associated with the geometric properties of the removal volume, which is extracted from work material shape and product shape, are stored in database as a machining case data. The most similar machining case data from the database can be selected according to the properties of the removal volume and the cutting conditions associated with the removal volume are reused. The proposed method can select the most similar machining case data from the database even for the complicated product shape, because each removal volume extracted by the proposed method is geometrically simple. In the case study for the validation of the proposed method, the cutting conditions, which is associated with the most similar geometric properties of removal volume from the database, were successfully determined. Furthermore, an NC program was automatically generated appropriately. The machining experiment using the generated NC program could be completed without any trouble.

Keywords

• cam
• nc program generation
• cutting condition
• process planning
• machining operation
• removal volume