Working principle

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,cooperate with high pressure water plush 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! Use liquid booster water pump with diameter larger than 0.3mm .

Application

High speed small hole drilling EDM machine is used for drilling fine holes and ultra-deep holes φ 0.2mm-3.0mm in many kinds of metals (such as stainless, quenched stells, carbide, coper, aluminum and other conductive materials) as well as super-hard conductors(such as hardalloysteel),the depth-diameter ration can reach to 300:1.Due to affordable cost and good performance, widely used to wire cutting initial holes,、and chemical fiber spinneret, spinneret hole of spinneret plate, filter plate, group holes of sieve plate、engine blade、heat dissipation hole of cylinder、the hydraulic、oil way of air operated valve、stomata. It can also erode the drill bit or taps broken in the working piece without destroy the original hole or screw.

Mechanical Features

Ø DZ703 series has X and Y axis manual control and Z axis program control, with handwheel of X and Y axis.

Ø The classic integrated design is adopted, which has beautiful shape, novel structure, superior performance and modern industrial flavor.

Ø The structural parts are manufactured from high quality cast iron.

Ø The X,Y,Z three-axis moving parts of the machine tool adopt precision linear guideway and ball screw.

Ø Three-axis 5µ linear grating ruler have digital readout displays（DRO）,It is consistent with operation.

Ø The rotary head is of straight gear transmission.

Ø Z axes is moved by motor.

Ø Spindle adopt servo motor, which has high speed and accurate positioning.

Ø The specialty plunger pump, thread gap filter

Ø The marble working table

Ø Equipped with Stainless steel workpiece installation fixture

Ø Equipped with centralized lubrication system.

Controller characteristics

Ø The super large scales integrate circuits make the impulse power supply reliable.

Ø The multiple power supply of high and low voltage and high-power VMOS field -effect transistor.

Ø It contains the operation and control mode of DZ703.

Ø The processing polarity can be changed.

Ø The processing stability is adjustable.

Ø Can drill deep hole with diameters 0.2mm ~ 3mm (the depth-diameter ratio is 300: 1)

Ø The speed of drilling hole is 10mm~100mm depth per minute (it is different for different material).

Ø Can drill wire-cut starting hole, filter hole, jet hole, gas hole, group holes and hole of super depth etc.

Ø Can drill small holes on the various conductive materials, even semiconductor material, especially stainless steel, chilled steel, copper, aluminium and hard alloy etc.

Ø Can drill on oblique and curved surface directly.

Ø Can easily erode the drill and screw tap etc which is broken in the workpiece and not destroy the screw thread of the holes.

Ø The working water can be normal water or saponification fluid.

Ø X, Y, Z axes have digital display devices.

Ø Z axis has the function of setting depth.