Abstract
Electric discharge machining is shown to be the best method developed and used for drilling precision micro-holes. High-performance piercing of micro holes with non-rigid requirements to hole surface accuracy and quality requires to use laser and electron-beam methods. The methods of casting and assembly are used to obtain super deep micro holes with the depth of 100 or more diameters. A comparative scientific and technical analysis of the world industrial technologies of obtaining micro holes in the historical development forms the methodological basis of the research. The article gives a physico-technical characteristic of ten methods of micro hole drilling, describes the equipment used and process capabilities the methods under discussion. The quantitative and qualitative assessment of technological processes is given as well. The rational application fields of ten methods of micro hole drilling are determined. The promising directions of improving the precision micro hole technology are developed.
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