Add–Sub Hybrid Manufacturing: Integration of Additive and Subtractive Processes for Advanced Manufacturing

Abstract

This paper explores the synergistic integration of additive manufacturing (AM) and subtractive manufacturing (SM) within a single hybrid manufacturing (HM) system. By combining the geometric freedom of 3D printing with the precision of CNC machining, hybrid systems offer unprecedented advantages in terms of design flexibility, surface finish, and production efficiency. This review highlights the architecture, operational planning, toolpath optimization, and challenges of hybrid manufacturing systems. Additionally, the paper provides a roadmap for future directions, emphasizing applications in aerospace, biomedical, and automotive sectors.

Keywords: Hybrid Manufacturing, Additive Manufacturing, Subtractive Manufacturing, 3D Printing, CNC Machining, Toolpath Optimization, Process Planning, Industry 4.0