Automation of tool path generation in multi-process micromachine tool for micromachining of prismatic and rotational parts

摘要

Computer numerical control (CNC) code generation is an inimitable activity of a Computer-aided manufacturing (CAM) system. Tool path formulation is considered as a machine-dependent activity, and expertise is essential to make attuned for a specific micromachine tool. This paper describes research for retrofitting of a multi-process micromachine tool for automatic CNC code generation for 2.5D micromachining. Micro turning, micro drilling and micro end milling processes are all considered. The proposed system comprises of three main elements: (i) part feature extraction through an extensible mark-up language (XML) schema, (ii) manufacturing logic formulation and CNC code generation by means of mathematical logic and (iii) online integration. XML-based feature extraction ensures trouble-free integration with the decision-making system. Automation of CNC code generation eliminates the need of human expertise, avoids compatibility issues and minimises program creation time. The developed system integrated with the micromachine tool through communication interface for real-time micromachining. The proposed system is intended for 2.5D machining of miniature and micro parts with external step, hole and slot features. The developed system performance has been validated through case study implementations.