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Curved electrode and electrochemical machining method and assembly using the same

A technology of electrochemical machining and bending, applied in electrochemical machining equipment, electric machining equipment, electrode manufacturing, etc., to achieve the effect of improving cooling

Active Publication Date: 2015-11-25
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing STEM processes and components are only capable of drilling straight holes

Method used

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  • Curved electrode and electrochemical machining method and assembly using the same
  • Curved electrode and electrochemical machining method and assembly using the same
  • Curved electrode and electrochemical machining method and assembly using the same

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Experimental program
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Embodiment Construction

[0060] refer to figure 2An electrode 10 for use in an electrochemical machining process is illustrated. For example figure 2 As shown, the curved electrode 10 includes a curved conductive member 12 . As used herein, the term "curved" means that the conductive member 12 is not cylindrical (or straight), similar to conventional shaped tube electrochemical machining (STEM) electrodes, as for example commonly assigned U.S. Patent No. 6,200,439 and 6,303,193, but is characterized by the radius of curvature R, such as figure 2 shown. The radius of curvature R will vary based on the application and the corresponding radius of curvature of the curved hole 22 to be drilled in the workpiece 20 . The curved electrode 10 also includes an insulating coating 14 covering at least a part of the side surface of the curved conductive member 12 . for figure 2 In the exemplary configuration shown, the insulating coating extends over the entire exposed side surface of the conductive memb...

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Abstract

An electrode for an electrochemical machining process is provided. The electrode comprises a curved, electrically conductive member, and an insulating coating covering at least a portion of a side surface of the curved, electrically conductive member. An electrochemical machining assembly is also provided for machining curved holes in a workpiece. The assembly includes at least one curved electrode and a power supply operatively connected to provide a pulsed voltage to the at least one curved electrode and to the workpiece. The assembly further includes a rotational driver operatively connected to move the at least one curved electrode along a curved path within the workpiece. The assembly is configured to remove material from the workpiece upon application of the pulsed voltage to the at least one curved electrode and to the workpiece. An electrochemical machining method is also provided for forming one or more curved holes in an electrically conductive workpiece.

Description

technical field [0001] The present invention generally relates to electrochemical machining. More particularly, the present invention relates to electrodes for forming curved holes, electrochemical machining assemblies, and electrochemical machining methods. Background technique [0002] A specially adapted form of electrochemical machining known as Shaped Tube Electrochemical Machining (STEM) is used to drill small deep holes in conductive materials. STEM is a non-contact electrochemical drilling process that can produce holes with aspect ratios as high as 300:1. It is the only known method capable of making the small deep holes used to cool high-efficiency gas turbine blades. [0003] The efficiency of a gas turbine engine is directly proportional to the temperature of the turbine gases directed from the engine's combustor and flowing over the turbine blades. For example, for gas turbine engines with larger blades, turbine gas temperatures approaching 1500°C (2,700°F) a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H3/04B23H3/00B23H9/14
CPCB23H9/14B23H3/04B23H9/00B23H9/006
Inventor 魏斌G·C·利奥塔
Owner GENERAL ELECTRIC CO