Design method of cathode for rotary tool in counter-rotating electrolytic machining
A technology of tool cathode and design method, applied in electric machining equipment, electrochemical machining equipment, machining electrodes, etc., can solve the problem of inappropriate electrode counter-rotating electrolytic machining, etc., and achieve the effect of improving design efficiency and high-precision electrolytic machining
Active Publication Date: 2019-05-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
In addition, in the electrode counter-rotating electrolytic machining, the electrodes are constantly doing relative rotation, and the machining process is also very different from the traditional electrolytic machining.
Therefore, the tool cathode design methods commonly used in traditional electrolytic machining, such as the "cosθ method", are not suitable for electrode counter-rotating electrolytic machining.
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[0047] figure 1 It is a schematic diagram of counter-rotating electrolytic machining. The anode of the workpiece and the cathode of the tool are in the form of an annular or conical rotator. During the machining process, the anode of the workpiece is parallel to the busbar of the cathode of the tool; Feed at a constant speed along the direction normal to the surface of the anode workpiece. There is a window on the cathode surface of the tool. During the counter-rotation process, the excess material on the anode surface of the workpiece is electrochemically etched away, and the position corresponding to the window forms a boss structure.
[0048] In the process of counter-rotating electrolytic machining, the profile of the side wall of the boss on the anode surface of the workpiece largely depends on the trajectory of the edge point of the cathode window of the tool. Therefore, the design of the tool cathode is transformed into: seeking the best trajectory of the edge point of...
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The invention discloses a design method for a rotating body tool cathode for contra-rotating type electrolytic machining, and belongs to the technical field of electrolytic machining. The design method comprises the following procedures that step 1, the workpiece half cone angle, the initial bottom diameter, the machining depth, the height, the width of a boss and the allowable error value of theboss are determined according to a drawing; step 2, the tool cathode half cone angle is determined according to the workpiece half cone angle; step 3, the tool cathode bottom diameter is determined according to the workpiece half cone angle, the tool cathode half cone angle, the initial workpiece bottom diameter and the workpiece machining depth; step 4, the tool cathode window included angle of each cross section is determined according to the tool cathode feed rate, the electrode contra-rotating angular speed and the width of the boss; step 5, three-dimensional coordinate values of a windowedge point of each cross section are calculated according to the tool cathode half cone angle, the bottom diameter and the window included angle; step 6, the tool cathode height is determined according to the workpiece height, the workpiece half cone angle and the tool cathode half cone angle; and step 7, a tool cathode three-dimensional model is drawn according to the tool cathode half cone angle, the bottom diameter, the height and the coordinate values of the window edge points.
Description
technical field [0001] The invention discloses a counter-rotating electrolytic machining tool cathode design method, which belongs to the technical field of electrolytic machining. Background technique [0002] There are many rotating parts in industrial production, such as rolls in roll forming, automobile piston rings, aircraft engine casings, etc. Taking the most typical aero-engine casing parts as an example, the outer surface usually has a complex concave-convex structure, and the material is mostly high-temperature alloy or titanium alloy. Using traditional machining, the tool loss is large, the processing cycle is long, and the processing The cost is high, the residual stress is large after processing, and the workpiece is easy to deform. It needs to go through a complex heat treatment process to eliminate the deformation. The manufacturing problem has become one of the bottlenecks in engine development. [0003] Electrolytic machining is the rapid removal of workpie...
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IPC IPC(8): B23H3/04B23H3/00
CPCB23H3/00B23H3/04
Inventor 王登勇朱增伟朱荻何斌葛永成
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS