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2. Electrical discharge machining - Wikipedia

   en.wikipedia.org/wiki/Electrical_discharge_machining

   A separate EDM head specifically for small hole drilling is mounted on a wire-cut machine and allows large hardened plates to have finished parts eroded from them as needed and without pre-drilling. Small hole EDM is used to drill rows of holes into the leading and trailing edges of turbine blades used in jet engines. Gas flow through these ...

3. Hole drilling method - Wikipedia

   en.wikipedia.org/wiki/Hole_drilling_method

   The hole drilling method is a method for measuring residual stresses, [1] [2] in a material. Residual stress occurs in a material in the absence of external loads. Residual stress interacts with the applied loading on the material to affect the overall strength, fatigue, and corrosion performance of the material.

4. Electrochemical machining - Wikipedia

   en.wikipedia.org/wiki/Electrochemical_machining

   B.R. and J.I. Lazarenko are also credited with proposing the use of electrolysis for metal removal. [2] Much research was done in the 1960s and 1970s, particularly in the gas turbine industry. The rise of EDM in the same period slowed ECM research in the West, although work continued behind the Iron Curtain. The original problems of poor ...

5. Deep hole drilling - Wikipedia

   en.wikipedia.org/wiki/Deep_hole_drilling

   Deep hole drilling also differs from normal drilling in that, depending on the drilling process and the drilling diameter, cooling lubricant must be pumped to the cutting edges in large quantities and under high pressure. This ensures good cooling and at the same time good lubrication of the contact areas between the workpiece and the cutting ...

6. List of welding codes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_codes

   Specification for carbon steel electrodes for shielded metal arc welding AWS A5.18: Specification for carbon steel electrodes and rods for gas shielded arc welding AWS B1.10: Guide for the nondestructive examination of welds AWS B2.1: Specification for Welding Procedure and Performance Qualification AWS D1.1: Structural welding (steel) AWS D1.2

7. Oil drilling, mining blocked from southeast New Mexico cave ...

   www.aol.com/oil-drilling-mining-blocked...

   An area of Lincoln National Forest known for a complex cave system was protected from oil and gas drilling and other mineral extraction, with the block on development extending for 20 years.