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A method for in-situ trimming of electric discharge machining electrodes

An electric spark and electric discharge machining technology, applied in the fields of electrode machining and cutting machining, can solve the problems of low machining efficiency and high equipment system cost, and achieve the effects of improving machining efficiency, high precision, and reducing the cumulative error of repeated clamping.

Active Publication Date: 2019-06-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode loss compensation method based on processing state monitoring is theoretically feasible. The method depends on the specific loss in the process of processing, and improves the processing accuracy by controlling the electrode motion real-time compensation, but requires more complex auxiliary monitoring equipment support. The cost of the equipment system is high, and the processing efficiency is low

Method used

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  • A method for in-situ trimming of electric discharge machining electrodes
  • A method for in-situ trimming of electric discharge machining electrodes

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Experimental program
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Effect test

Embodiment 1

[0031] figure 1 It is a schematic flow chart of an in-situ trimming method for an EDM electrode according to an embodiment of the present invention, as shown in figure 1 As shown, the in-situ trimming method of the EDM electrode in the embodiment of the present invention includes the following steps:

[0032] Step 101: Fix the workpiece and the electrode dressing tool on the processing platform, and install the EDM electrode on the moving spindle.

[0033] Step 102: Obtain the position coordinates of the electrode dressing tool, the initial machining position coordinates of the workpiece, the machining array constraints, the movement threshold, and the initial shape parameters of the EDM electrode, and store them in the controller on the machining platform.

[0034] Step 103: According to the coordinates of the initial machining position of the workpiece, move the moving spindle to move the EDM electrode to the initial machining position of the workpiece, and then move the mo...

Embodiment 2

[0043] figure 2 It is a flow chart of the in-situ trimming method for the hemispherical head electrode in the embodiment of the present invention, as figure 2 As shown, the embodiment of the present invention takes the electric discharge milling process of a hemispherical head electrode as an example, which mainly includes three parts: preliminary preparation, processing and trimming.

[0044]Preliminary preparation: Fix the workpiece and electrode dressing tool on the processing platform, install the hemispherical head electrode on the moving spindle, and zero-calibrate the electrode dressing tool; obtain the position coordinates of the electrode dressing tool and the initial machining position coordinates of the workpiece and place them on the workpiece Unified programming in the coordinate system, obtain machining accuracy, machining array requirements and uniform programming in the processing program; obtain the initial shape of the electrode, the theoretical loss value ...

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Abstract

The invention discloses an electrosparking electrode in-place finishing method. The method comprises the following steps: a machined part, an electrode finishing cutter and an electrosparking electrode are mounted in an appointed position, and parameters needed by the machining and finishing processes are programmed in an unified manner; according to machining array constraint conditions, the electrosparking electrode is shifted to discharge the machined part and to judge if the obtained shifting distance of the electrosparking electrode is smaller than a shifting threshold in real time; whenthe shifting distance is smaller than the shifting threshold, the machining is continued; when the shifting distance is larger than or equal to the shifting threshold, the machining is stopped; the electrosparking electrode is shifted to the electrode finishing cutter for finishing; after an initial shape of the electrosparking electrode is finished, the finishing is stopped; the electrosparking electrode is shifted to a machining stop position; and the machining is continued until the machining array constraint conditions are met. The method has no need to take down the machined electrode, sothat the finishing precision and the machining efficiency are improved.

Description

technical field [0001] The invention relates to the field of electrode processing and the field of cutting processing technology, in particular to an in-situ trimming method of an electric discharge machining electrode. Background technique [0002] In order to solve the problem of the reduction of machining accuracy caused by electrode loss in the process of EDM, the electrode compensation method of EDM is mainly used at present. The existing EDM electrode compensation mainly includes electrode loss compensation based on model prediction and electrode loss compensation based on machining status monitoring. The electrode loss compensation method based on model prediction mainly uses the simulation before processing, and performs electrode compensation according to the electrode loss prediction results. The electrode loss compensation method based on processing state monitoring is to monitor the electrode shape in real time during processing, and perform real-time compensati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H11/00B23H1/04
CPCB23H1/04B23H11/00
Inventor 周天丰马福宾周承华颜培梁志强焦黎王西彬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY