Gas-assisted protection integral impeller trepanning electrolytic machining process and device

An integral impeller and gas-assisted technology, applied in the direction of electric processing equipment, electrochemical processing equipment, auxiliary devices, etc., can solve the problems of unstable open flow field and the blades cannot be fully insulated and protected, so as to reduce machine tool corrosion and improve The service life of the machine tool and the effect of stable processing

CN114247943AActive Publication Date: 2022-03-29JITRI INST OF PRECISION MFG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-03-29

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Abstract

The invention discloses an integral impeller trepanning electrolytic machining process and device with a gas-assisted protection function, and belongs to the field of electrolytic machining. The upper part of the device is provided with a cylindrical cathode seat which is in clamping connection with a main shaft, and the bottom of the cylindrical cathode seat is provided with a pin hole so as to realize the positioning of a cathode; a vent hole is formed in the middle of the device and used for conducting gas-assisted insulation on a machined blade and a blade to be machined. An insulation sealing device is arranged on the lower portion of the device, and the insulation sealing device and the front blade insulation sleeve and the rear blade insulation sleeve inside the device form a closed machining area to achieve closing of an electrolytic machining flow field. In the machining process, the blade sleeved with the blade insulation sleeve is always in the gas auxiliary insulation state, and the stray corrosion degree of the machined blade is effectively reduced. The method solves the problems that the machined blade is subjected to stray corrosion and the flow field open type electrolyte remains in a non-machining area during the trepanning electrolytic machining of the uniform-section blade type integral impeller, and is beneficial to improving the machining precision of the blade and enhancing the stability of the machining process.
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Description

technical field

[0001] The invention relates to the technical field of special processing, in particular to a gas-assisted protective integral impeller casing electrolytic processing process and device. Background technique

[0002] The constant-section blade-type integral impeller is an integral component with complex curved surface, which is widely used in turbofan engines, compressor rotors and high- and low-pressure turbines in the aerospace field. The integral component has the advantages of light weight, high fatigue strength, and compact structure.

[0003] The processing methods of integral impellers with equal cross-section blades include electric discharge machining, precision casting, numerical control milling, linear friction welding, and nesting electrolytic machining. If EDM technology is used to process the overall impeller with equal cross-section blade shape, micro-cracks and recast layers will appear on the surface of the impeller to varying degrees, which...

Examples

Embodiment Construction

[0033] The above-mentioned content of the present invention will be described in further detail below by the form of the embodiment, but this should not be interpreted as the scope of the above-mentioned theme of the present invention being limited to the following embodiments, all technologies realized based on the above-mentioned content of the present invention belong to scope of the invention.

[0034] The invention provides a gas-assisted protective integral impeller casing electrolytic processing device, such as figure 1 As shown, it includes a cathode clamping device 1 , a gas mixing device 2 , an insulating sealing device 3 , an indexing device 4 and a workpiece clamping device 5 . The cathode holding device 1 includes a cylindrical cathode holder 101, a cathode holder insulating block 102, a cathode insulating block 103, a left insulating shell 104, a right insulating shell 105, and an arched bridge-shaped cathode 106; the gas mixing device 2 includes an insulating ba...