Cathode profile design and digital correction method for blade precision electrolysis

Abstract

The invention discloses a cathode profile design and digital correction method for blade precision electrolysis. A cathode structure used for precision electrolysis forming of a compressor blade is very complex and comprises a pair of three-dimensional curved surface working cathodes, a sealing flow stabilizing structure, an electrolyte inlet / outlet, and an insulation protected special HSK hydraulic chuck; the formed cathode profile, namely the pair of three-dimensional curved surface working cathodes, is designed into initial profiles with different shapes through gap calculation, and the forming precision of the initial machining of the blade profile is guaranteed; and digital correction and repeated iteration are carried out by utilizing the reverse engineering principle, so that the requirement of non-allowance forming of the blade profile is finally met. The cathode profile design and digital correction method for blade precision electrolysis has the advantages that precise designand effective correction of the cathode of non-allowance precision electrolysis machining of the compressor blade are achieved, and the non-allowance machining of the blade profile is ensured; and the development difficulty and development period of the electrolysis process are both reduced, and the precision and controllability of iteration of the precision electrolysis process of the compressorblade are guaranteed.

Description

technical field [0001] The invention relates to the field of blade processing, in particular to a blade precision electrolysis cathode profile design and digital correction method. Background technique [0002] The principle of electrolytic machining is a non-traditional cutting method that uses the principle that metals can undergo anodic dissolution in the electrolyte to remove materials and shape workpieces. In electrolytic machining, the tool (knife) is connected to a DC power supply as the cathode and the workpiece as the anode. In the electrolyte, the cathode of the tool moves to the anode of the workpiece at a certain speed, and the charge exchange occurs between the tool and the workpiece. The material of the anode workpiece is dissolved and taken away by the high-speed flowing electrolyte, thereby achieving very precise processing requirements. [0003] Using electrolysis to process engine compressor blades has been widely used in foreign advanced aero-engines. For...

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Problems solved by technology

[0004] At present, the current leading process of this kind of compressor blade in China adopts two processes of rolling and forging. Due to the large curvature of the blade profile, end bending, and sweep back, the current leading process cannot achieve no margin, and the blade is deformed after processing, resulting in The profile is out of tolerance and the manufacturing conformity is poor

In the case that the current technology cannot realize the precise machining of the intake and exhaust edges, the use of CNC milling to process the airfoil profile can achieve the goal of precision machining of the airfoil profile, but the cost and efficiency cannot meet the requirements of mass production

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