Key points of electrochemical deburring equipment processing technology
Key points of processing technology for electrochemical deburring machine equipment:
The power supply of electrochemical deburring equipment adopts electrolytic power supply. There are many process factors that affect the effect of pulse electrochemical deburring, such as the reasonable design of tool cathode, parameter selection of pulse power supply, composition, concentration, pressure and flow rate of electrolyte, inter electrode gap, current density, processing time, flow field characteristics, etc.
Cathode tool for electrochemical deburring equipment
The tool cathode should be designed reasonably according to the specific burr situation, and attention should be paid to the application of masking technology during design to ensure efficient removal of burrs while protecting the original accuracy and surface quality of other non burr parts of the workpiece anode surface. In addition, the basic principles of pulse electrochemical machining should also be met, ensuring that the flow field distribution is uniform and reasonable even when the electrolyte quickly and uniformly flushes the machined part. Due to the direct impact of electrode surface quality on the surface quality of deburring areas, it is required that the cathode surface of the tool be flat and smooth.
Pulse power supply for electrochemical deburring equipment
Theoretical research and practical processing have shown that using pulse power instead of DC power for deburring can effectively improve machining accuracy and surface quality. In processing, narrow pulse widths and high pulse frequencies are generally used for machining. Due to the gap effect and step change of pulse current, the electrolyte in the machining gap oscillates, generating pressure waves. The stirring effect of pressure waves can improve the flow conditions of the electrolyte in the machining gap, accelerate the renewal of the electrolyte in the gap, eliminate the uneven distribution of electrolyte conductivity in the machining gap, thereby improving machining accuracy and surface roughness. In addition, due to the periodic updating of the electrolyte, the electrochemical products in the gap (metal removed from the anode, hydrogen gas released from the cathode, and Joule heat generated, etc.) can be eliminated in a timely and sufficient manner. The parameters of the pulse power supply should be reasonably selected according to the processing conditions.
Electrolyte for electrochemical deburring equipment
The composition of electrolyte is the main factor affecting processing quality. Nonlinear electrolytes mainly composed of neutral inorganic salts have the characteristics of wide applicability, easy control, low stray corrosion, good surface quality during processing, and no pollution to the environment. During processing, the specific composition of the electrolyte should be determined based on the size of the burrs, and the flow direction, flow rate, and pressure of the electrolyte should be designed reasonably to quickly flush the removed burrs away from the processing gap and avoid short circuits.
Other process factors
Reasonable selection of the gap between the anode and cathode is beneficial for improving the etching speed and machining accuracy, as well as enhancing the surface quality of the machining. The selection of current density and processing time is also very important. If the current density is too high, it will exacerbate stray corrosion. If the current density is too low, it will reduce processing efficiency and prolong processing time. If the processing time is too long, it will exacerbate grain boundary corrosion. On the premise of meeting the efficiency of burr removal, the processing time should mainly be determined based on the size of the processed fillet.
