Microporous processing becomes simpler
The micro EDM independently developed by Suntech was finally introduced to the market in November of 2022.It is a good news in the field of precision solid tungsten steel nozzle processing. It challenges the processing limit in the field of micro hole processing, greatly meets the demand for micro hole processing of tungsten steel, and will certainly improve the capacity of micro processing manufacturing equipment.
Micro EDM is a non-contact machining process, which has the advantages of small macro cutting force and machining hard materials. After decades of development, micro EDM has reached a fairly high technical level. Micro energy pulse power supply, micro feed system, servo control system and CNC system have been developed and applied in micro EDM. The surface roughness of micro EDM can reach Ra0.2. In the processing of micro cavities or micro structural parts, the highest processing accuracy can reach 4 um. It can meet the processing requirements of micro holes and micro dies. Micro EDM machine uses micro tungsten wire or alloy wire as tool electrode. Micro energy pulse power supply and special spark oil are applied for machining. Under the control of CNC system, CNC spindle (micro feed system) makes linear servo movement according to the detection information of processing state. When the liquid medium between the tool electrode and the workpiece is broken down, a spark pulse discharge is formed. Then a high temperature is generated instantaneously in the spark channel and the metal on the surface of the workpiece is partially melted or even vaporized. Small erosion particles are formed from melted workpiece after cooling by the spark oil. The metal erosion processing will be finished after all the small erosions are washed away by the spark oil.
The micro EDM of Suntech can process Φ0.03mm - Φ0.15mm micro hole which can be extended to Φ1mm according to customer needs. It also can be used to process four edge inverted cone micro holes and a variety of special-shaped holes. The CNC system automatically controls each CNC shaft to realize the complex precision positioning. According to the discharge state detection and identification and intelligent control strategy, the micro EDM can realize the machining of various kinds of precision micro-holes such as the nozzle injection micro-hole seat on various engines. It has the characteristics of high machining efficiency, high machining precision, good surface quality, good aperture consistency, easy operation, no environmental pollution and so on.
In addition to the function of processing micro holes, the micro EDM of Suntech has the functions of automatic edge searching and alignment, and automatic on-line hole depth detection, which greatly simplifies the machine operation and reduces the requirements for operators.
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