Die-sinking EDM

This type of EDM is, as mentioned before, for the manufacture of bore holes for later processing by wire-cut EDM (Figure 4.30). This is a variation of die-sinking EDM on special machines. Since the processing of the workpiece is carried out without contact, bore hole diameters of up to 0.2 mm can be created. 

Workpiece heights wire-cut EDM 200 to 600 mm (depending on the machine type) Workpiece heights die-sinking EDM 300 to 3,000 mm (depending on the machine... 

FIGURE 4.33 View into the processing area of a die-sinking EDM machine (left) and detailed explanation of the tool electrode elements shown from top to bottom ... 

FiGURE 4.37 Pins (left), which are manufactured through die-sinking EDM, and the counterpart (right)... 

In combination of die-sinking EDM and wire-cut EDM, high precision inserts can be manufactured for the production of micro-plastic parts. Figure 4.43 shows the compiexity and precision of this type of process on the example of micro-stamping. Figure 4.44 iilustrates another combination part. 

Electro discharge (spark erosion) techniques rely heavily on the ability of EDM oil to act as an electrical insu-lant, to dissipate heat from the electrode, and to flush away erosion debris from the workpiece. EDM oils also are suitable for all die-sinking spark erosion operations. They should have low aromatic levels, good filterability, low fuming, high dielectric strength, excellent oxidation resistance and low color level. 

The jet mixers were made of Hastelloy and manufactured by die sinking, a special variant of the p-EDM technique using small cylindrical electrodes [39,136],... 

Two types of EDM, which is controlled spark micro machining under a dielectric fluid, exist. They are namely EDM die-sinking, where an electrode is moved into... 

Sinking-EDM (spark erosion sinking, die sinking, ram sinking). 

Especialiy for die-sinking, since abrasion on the tooi through EDM cannot be avoided, several tools for the processing must be manufactured to accurateiy create the desired contour at the end. 

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