What is an Small Hole EDM Drilling Machine

Small Hole EDM Drilling Machine

High speed small hole drilling machine adopt electrode to drill hole according electrical discharge theory. Is to use the fine metal copper tube (called electrode tube) which moves vertically up and down continuously as an electrode to perform pulse spark discharge on the workpiece to remove the metal and form it. The electrode is a hollow copper rod, and the working fluid (water or drilling fluid) passes through the fine hole in the middle of the hole of the copper rod, which plays the role of cooling and chip removal. As the liquid has to pass through the small hole of copper tube during processing, the processing micropore may block the copper tube, so the electromagnetic pneumatic booster pump is used for the small hole less than 0.3mm, and the copper tube electrode is not easily blocked during processing, so more precise holes can be processed!  

According to the control mode, the piercer is divided into single-axis control, three-axis  control and multi-axis  control.

Single-axis manual small hole EDM drilling machine has automatic control on Z-axis. Manual control on the X and Y axes. use handwheel to move to the location of drilling position according to a digital readout of linear scale.

CNC EDM small hole drilling machine, basically, there are three axis control(X, Y, Z), 4-axis control(X, Y, Z and W), 5-axis control(X, Y, Z, W and C), 6-axis control, (X,Y, Z, W, B and C) and even more. On the CNC EDM drill machine, Z axis spindle servo stroke: W axis is the stroke of machine head; C axis rotation in horizontal direction; B is swing in vertical direction. Equipped with automatic electrode or guide changer, CNC EDM drilling machine can do automatic machining.

Usually, it's ideal to process holes with small diameter but big depth, especially material that can't be machined by the small hole EDM drilling machine. 

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