Biomedical devices manufacturing processes

The lathe and its function. Driving and feeding work. Holding devices. Turning on centers, taper turning, screw-cutting; eccentric turning, form-turning. Boring and saddle. Button bearing. Automatic lathe. Copy turning and capstan lathe. Types of milling machines; milling cutters. Machine feed and rotation. The driving head; linear indexing and linear graduating. Gear cutting, rack cutting attachment. General principle of machining, using point and multi – point cutting tools. Chip formulation, cutting forces cutting parameters. Tools temperature, life and wear. Cutting threads, surface roughness. Tools materials. Design of single point and multiple – point cutting tools. Drills and milling cutters; causes of vibration and chatter in machine tools operation. Principles of casting; sand casting, plaster and mould casting; shell moulding, investment cast; permanent mould casting; centrifugal casting, die casting, continuous casting. Defects in casting. Design of casting; riser designer and placement; solidification control.