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    Main points of processing technology of electrochemical deburring equipment

    2019-09-24

    The main points of the processing technology of electrochemical deburring machine equipment:


    Electrochemical deburring equipment adopts electrolysis power supply, and there are many process factors that affect the effect of pulse electrochemical deburring, such as the reasonable design of tool cathode, the parameter selection of pulse power supply, electrolyte composition, concentration, pressure and flow rate, and interelectrode Gap, current density, processing time, flow field characteristics, etc.


    Tool cathode of electrochemical deburring equipment


    The tool cathode should be designed reasonably according to the specific burr situation. When designing, attention should be paid to the application of masking technology to ensure that the original accuracy and surface quality of other non-burr parts on the anode surface of the workpiece are protected while efficiently removing burrs. In addition, the basic principles of pulse electrochemical machining should also be met, even if the electrolyte washes the processed part quickly and evenly, to ensure a uniform and reasonable flow field distribution. Since the surface quality of the electrode directly affects the surface quality of the deburring part, the cathode surface of the tool is required to be flat and smooth.


    Pulse power supply for electrochemical deburring equipment


    Theoretical research and processing practice show that using pulsed power supply instead of DC power supply for deburring processing can effectively improve processing accuracy and surface quality. In processing, generally narrow pulse width and higher pulse frequency are used for processing. Due to the gap effect and step change of the pulse current, the electrolyte in the machining gap oscillates and generates a pressure wave. The stirring effect of the pressure wave can improve the flow conditions of the electrolyte in the machining gap, accelerate the renewal of the electrolyte in the gap, and eliminate The unevenness of the electrolyte conductivity distribution in the machining gap, thereby improving the machining accuracy and improving the surface roughness. In addition, due to the periodic renewal of the electrolyte, the electrochemical products in the gap (metal removed at the anode, hydrogen precipitated at the cathode, and Joule heat generated, etc.) can be removed in time and fully. The pulse power parameters should be selected reasonably according to the processing conditions.


    Electrolyte for electrochemical deburring equipment


    The electrolyte composition is the main factor that affects the processing quality. The non-linear electrolyte with neutral inorganic salt as the main component has the characteristics of wide application range, easy control, low stray corrosion, good processing surface quality, and no pollution to the environment. During processing, the specific composition of the electrolyte should be determined according to the size of the burr, and the flow direction, flow rate and pressure of the electrolyte should be reasonably designed to quickly flush the removed burr away from the processing gap to avoid short circuits.


    Other process factors


    Reasonable selection of the gap between the anode and the anode is beneficial to increase the erosion speed and processing accuracy, and improve the quality of the processed surface. The selection of current density and processing time is also very important. Excessive current density will aggravate stray corrosion, too small current density will reduce processing efficiency and prolong processing time, while too long processing time will aggravate grain boundary corrosion. On the premise of meeting the burr removal efficiency, the processing time should be determined mainly according to the size of the processing fillet.


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