Pulse dynamic electrochemical machining apparatus and method for rapidly leveling surface of revolving part

A pulse dynamic electrochemical machining apparatus for rapidly leveling a surface of a revolving part, comprising a power source, a displacement sensor, and a control system,

• wherein the power source has a positive electrode connected to an anode workpiece and a negative electrode connected to a cathode tool;
• the displacement sensor is configured to collect outer cylindrical contour data of the anode workpiece and transmit the outer cylindrical contour data to the control system;
• the outer cylindrical contour data comprises a highest contour point, a lowest contour point, and consecutive contour points between the highest contour point and the lowest contour point, wherein the highest contour point corresponds to a maximum radius value, and the lowest contour point corresponds to a minimum radius value;
• the control system is configured to determine a machining voltage value output by the power source when each contour point of the anode workpiece rotates to a machining area;
• during rotating pulse dynamic electrochemical machining, the cathode tool rotates around a center point of the cathode tool at a constant angular velocity, and the anode workpiece rotates around a center point of the anode workpiece at the constant angular velocity;
• meanwhile, the cathode tool performs a feed movement at a set feed velocity along a line of centers of the cathode tool and the anode workpiece;
• the control system determines the machining voltage value output by the power source when each contour point of the anode workpiece rotates to the machining area to automatically change an applied voltage between the cathode tool and the anode workpiece;
• and the control system controls the power source to output a maximum voltage value when the highest contour point of the anode workpiece rotates to the machining area and controls the power source to output zero voltage value when the lowest contour point of the anode workpiece rotates to the machining area;
• during rotating pulse dynamic electrochemical machining,
• the displacement sensor is configured to collect outer cylindrical contour data of the anode workpiece before the jth revolution of the anode workpiece;
• and
• the control system is configured to:
• calculate a maximum roundness error based on the outer cylindrical contour data of the anode workpiece before the jth revolution of the anode workpiece;
• determine whether the maximum roundness error is greater than a set tolerance value to obtain a determination result;
• if the determination result indicates that the maximum roundness error is greater than a set tolerance value, calculate a machining voltage value output by the power source corresponding to each contour point during the jth revolution of the anode workpiece based on the maximum roundness error, update the maximum roundness error in the step of determining whether the maximum roundness error is greater than a set tolerance value to obtain a determination result to a maximum roundness error corresponding to the (j+1)th revolution, and return to the step of determining whether the maximum roundness error is greater than a set tolerance value to obtain a determination result;
• and
• if the determination result indicates that the maximum roundness error is less than or equal to the set tolerance value, control the power source to output a constant machining voltage value.