Abstract:
Micromachining is the basic technology for fabrication of micro-components of size in the range of 1 to 500 micrometers. Their need arises from miniaturization of various devices in science and engineering, calling for ultra-precision manufacturing and micro-fabrication.
Why Micro Machining?
Present day High-tech Industries, Design requirements are stringent. Extraordinary Properties of Materials (High Strength, High heat Resistant, High hardness, Corrosion resistant etc) Complex 3D Components (Turbine Blades) Miniature Features (filters for food processing and textile industries having few tens of microns as hole diameter and thousands in number) Nano level surface finish on Complex geometries (thousands of turbulated cooling holes in a turbine blade) Making and finishing of micro fluidic channels (in electrically conducting & non conducting materials, say glass, quartz, &ceramics).
Micromilling & MicroGrinding
Among the conventional machine processes based on material removal from a workpiece, the most popular case those in which the useless part of the workpiece is removed by mechanical force through plastic or brittle breakage. In the process of this type, the first requirement of micromachining ,small Ur. Is satisfied when a high stress that causes breakage of material is applied to a very small areaor volume of the workpiece. Although cutting is the most conventional machining process, the availability of ultra precision cutting machines with highest level of positioning accuracy, has enabled us to apply this process in micromachining.. Turning, milling and griding are examples of processes of this type. For realising this a tool that was its edge sharpe.
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Micromachining Seminar
PPT