| EDM technology is currently the most widely used special processing technology the most popular. Now EDM technology commonly used are: electric spark cutting, EDM, EDM milling technology. Now EDM technology also has many problems, such as low efficiency, poor machining quality. The main factors that affect the machining efficiency and quality is of EDM pulse power supply. In order to further improve the processing quality of EDM to improve processing efficiency, through the research of the current domestic and foreign existing EDM pulse power supply structure, this topic proposed an energy controllable pulse power supply. Pulse energy of the power supply can be precisely controlled electric spark processing, to ensure the uniformity of the electric spark processing, thus improving the quality of electric spark processing, reducing finishing workload.This topic in depth study of the embedded system, single phase full bridge DC/DC converter technology, CAN bus communication technology, GUI interactive technology and VB language programming technology, designed and developed a high utilization rate of a power, wide range of current regulation, can accurately control the pulse discharge energy.The power to abandon the traditional pulse power transformer of transformer, using high frequency DC/DC transformation technique to transform the power input voltage. The volume of power supply using DC/DC transform technique compared to the traditional power supply to small lot, promoted the development of EDM pulse power supply miniaturization and high power.The power supply adopts inductance instead of traditional EDM pulse power supply current limiting resistor. Due to the inductance itself has no power loss, so the pulse power inductor current limiting greatly improves the utilization rate of electric energy. At the same time, because there is no filter resistance heating problems, power supply temperature has dropped a lot, improves the power of life and stability. Infinite flow resistance of power to meet the requirements of the power saving energy, accord with the requirement of the society to the energy saving and environmental protection.Compared with the traditional pulse power supply the power increase of embedded processor as the master power supply device, the power to become an independent device can work independently. According to the parameters of main control computer processor sends request independently complete the power output and the closed-loop control, reduce the workload of machine tool industry control computer, ensure the stability of edm. At the same time as the independent power supply increased the power of the portable, convenient power supply is connected with the different processing machine, enlarged the application range of power supply.Power supply using CAN bus and the main control equipment for communication. CAN bus is a bus protocol is widely used at present, can be through a bus will be more pieces of equipment connected to each other with communication. Power supply based on CAN bus communication can make the machine conveniently connected with the power supply and other auxiliary equipment, reduce the machine upgrade and refit the workload. To improve the adaptability of the machine tool.Power supply with liquid crystal display integrated GUI interface, various parameters of the power can work synchronously display, make the user more convenient to understand the working state of power.The use of VB language development of computer, control interface. The control interface is simple easy to use, but also can be easily with a variety of machine tool control system fusion hybrid, increases the power of the portability and the scope of application.Power supply design is completed and EDM pulse milling machine connection for machining experiment, ability to supply fine machining, the rough machining are verified, confirmed that the power of the function parameters and stability. |
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