Geometric control and best fitting of electric discharge machining tools

A technology of electrical discharge machining and geometric elements, which is applied in electric machining equipment, program control, electrode manufacturing, etc., can solve problems such as expensive, unsatisfactory known system accuracy, and time-consuming

Inactive Publication Date: 2017-08-01
NUOVO PIGNONE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This known method of inspecting EDM electrodes is expensive and time consuming, especially since a dedicated part program is required for the CMM to inspect each EDM electrode
Furthermore, the accuracy of known systems is not satisfactory

Method used

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  • Geometric control and best fitting of electric discharge machining tools
  • Geometric control and best fitting of electric discharge machining tools
  • Geometric control and best fitting of electric discharge machining tools

Examples

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Embodiment Construction

[0036] The following detailed description of the exemplary embodiments refers to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. Additionally, the drawings are not necessarily drawn to scale. Also, the following detailed description does not limit the invention. Rather, the scope of the invention is defined by the appended claims.

[0037] References throughout this specification to "one embodiment," "an embodiment," "preferred embodiment," and "different embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in the present disclosure. In at least one embodiment of . Thus, appearances of the phrase "in one embodiment" or "in an embodiment" or "in some embodiments" in various places throughout this specification are not necessarily referring to the same embodiments. Additionally, the particular features, structures, or characteristics...

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Abstract

A method for checking a geometry of an electric discharge machining electrode (11) is described. The method comprises the following steps: providing a file containing a native 3D-model (21) of the electric discharge machining electrode; providing a manufactured electric discharge machining electrode (11) based on the native 3D-model; light scanning a set of images of the manufactured electric discharge machining electrode in different positions and generating therewith a scanned 3D-model (23) of the manufactured electric discharge machining electrode; comparing the native 3D-model (21) and the scanned 3D-model (23) and generating electrode compensation coordinates for an electric discharge machining apparatus, to correct an electrode path during electric discharge machining.

Description

technical field [0001] The present disclosure relates to electrical discharge machining. More specifically, the present invention relates to the machining of electrodes or tools for machining impellers of turbomachines, such as but not limited to centrifugal pumps and centrifugal compressors. Background technique [0002] An impeller for a centrifugal turbomachine typically includes a disk or hub having a plurality of blades extending therefrom and defining a plurality of vanes through which fluid being processed by the turbomachine flows. In some embodiments, the impeller further includes a shroud connected to the disk by blades disposed between the disk and the shroud. [0003] According to some known methods, centrifugal impellers are machined by electrical discharge machining (hereinafter also referred to simply as EDM hereafter). EDM is a thermal erosion process in which metal is removed by a series of cyclic electrical discharges between an electrical discharge machi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H7/20
CPCB23H7/20B23H7/18B23H9/10B23H1/04G05B19/404G05B2219/45221G05B2219/45225G05B2219/50285
Inventor M.阿乔尼C.巴塔利
Owner NUOVO PIGNONE SPA
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