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Titanium and titanium alloys have high specific strength , good corrosion resistance , high thermal strength , impact resistance and other characteristics , are widely used in aircraft, missiles , ships , automobiles, petroleum , chemical, biomedical and other fields . However , titanium poor thermal conductivity, resulting in the difference in its machinability . EDM method as a non - traditional processing method has a strong advantage in the machining of difficult to machine materials , especially complex cavity for titanium alloy materials processing , EDM has many advantages . Pulse power as an important part of the EDM machine tools , impact on the EDM process indicators . Developed for titanium alloy EDM pulse power supply has a very important significance . First, traditional EDM pulse power a series of single - factor experiments , initial grasp of the laws of the EDM titanium alloy , designed to prepare special pulse power . The analysis of experimental results found obvious pits on the surface of titanium alloys , electrode surface significantly raised , processing discharge concentration . This article proposes an asymmetric alternating pulse power to utilize the asymmetric alternating pulses role of the discharge point transfer , discharge evenly distributed , titanium alloy parts in order to achieve high efficiency , precision EDM . The asymmetric alternating pulse power developed mainly include several parts of the main oscillation circuit , the driver circuit , a power conversion circuit , and a discharge state detecting circuit and the like . Positive pulse width , negative pulse width , pulse 5μs-500μs adjustable timely treatment , and discharge status detection signal . The role is to discharge the primary circuit of a total of nine road MOSFET, the former eight-way parallel , ninth road the alternating asymmetric pulse , in order to eliminate the spark discharge machining titanium concentration phenomenon . Finally, the development of pulse power debugging Compared with conventional unidirectional pulse power experiments . The study showed that: the rest of the processing conditions the same , the asymmetric pulse processing efficiency of the power supply is higher than the processing efficiency of the one - way pulse power , the electrode relative loss is reduced , to verify the feasibility of the design of the pulse power supply .
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