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Method and device for nearly forming quick coarse working for round disc with blade

A disc and blade technology, applied in the field of devices, can solve problems such as not being able to be used in production

Active Publication Date: 2009-01-07
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, galvanic corrosion of the machined surface is a relative process, and many pits will be formed in the corroded area
Therefore, this technique cannot be used to produce workpieces that require fine machining

Method used

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  • Method and device for nearly forming quick coarse working for round disc with blade
  • Method and device for nearly forming quick coarse working for round disc with blade

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Experimental program
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Effect test

Embodiment Construction

[0012] The present invention aims to solve the machining difficulties associated with the manufacture of components such as bladed discs and complex structures.

[0013] Aircraft engines and industrial gas turbines have traditionally used bladed compressor disks in which individual blades are anchored to a slotted center holder by nuts and bolts. To reduce aerodynamic losses in the engine, engine weight and complexity, this disk assembly has been replaced by a one-piece bladed disk (also known as a blisk). In an engine, a single bladed disc can replace as many as 120 or more parts.

[0014] However, bladed discs are not easy to machine. In the manufacture of bladed discs, it is common to start with an initially disc-shaped workpiece. Material is removed in the following manner to form a cavity between the convex and concave surfaces on two adjacent fins. This process is repeated until all cavities have been completed and the remaining material defines the pre-machined fins ...

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PUM

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Abstract

The present invention provides an apparatus for machining airfoils on a bladed disc, the apparatus comprising an annular cutting element rotatably supported about a shaft and suitable for electrical machining, wherein the annular cutting element comprises Invert the circular edge of the cup member. The present invention also provides a method for machining fins on a bladed disc, the method comprising the steps of: driving an annular cutting element to rotate about its axis; powering the annular cutting element; providing fluid to the annular cutting element; A programmable control device is used to move the annular cutting element in three directions relative to each other and to etch material away from the workpiece to form the bladed disc.

Description

technical field [0001] The present invention relates generally to a method of electromachining, and more particularly to an apparatus for rough machining the airfoils of a bladed disc (or so-called bladed disc) to a near final shape. Shape, the device has a higher metal removal rate and lower tooling cost compared to turning, milling, EDM (Electrical Discharge Machining) or ECM (Electrochemical Machining). Background technique [0002] Electromachining is a technique in which material is removed from a workpiece by rotating an electrode with a certain cross-sectional shape and at the same time controlled electroerosion. The movement principle of this machining method is similar to that of milling or grinding. The tool electrode and the workpiece are respectively connected to the negative and positive poles of the pulse generator or continuous DC power supply. The gap between the electrodes is used for the flow of electrolyte. [0003] Electrocorrosion can be formed by ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H9/10B23H7/22B23H7/20B23H5/06B23H3/00
CPCB23H3/00B23H9/10
Inventor B·魏M·李R·埃特林顿M·兰菲尔
Owner GENERAL ELECTRIC CO