Electrical discharge machining system and method
A technology of electrical discharge machining and electrodes, which is applied in the field of electrical discharge machining systems, can solve problems such as reduced workpiece life, inaccurate completion, and changes in the exit of through holes
Active Publication Date: 2015-08-26
GENERAL ELECTRIC CO
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Problems solved by technology
In general, however, using data on electrode wear to estimate via completion may not be precise enough, and it may not be possible to avoid collisions of the electrode with other components or surfaces behind the via
Also, due to poor control of this penetration stage, the mass at the exit of the via may vary significantly
This can lead to cracking of the workpiece and instability of fluid flow, reducing the life of the workpiece
Method used
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Embodiment Construction
[0014] figure 1 A schematic diagram of one embodiment of an electrical discharge machining system 10 of the present invention is shown. In the embodiment of the present invention, the electrical discharge machining system 10 can be used to process the through hole 101 on the workpiece 100 . Such as figure 1 As shown, the electrical discharge machining system 10 includes an electrode 11 , a pulse generator 12 , a machining fluid source 13 , a position control element 14 , a control device 15 and a penetration detection unit 16 .
[0015] exist figure 1 In the illustrated embodiment, electrode 11 and workpiece 100 are connected to the cathode and anode of pulse generator 12, respectively. Thus, in some embodiments, electrode 11 and workpiece 100 may function as a cathode and an anode, respectively. In other embodiments, the electrode 11 and the workpiece 100 may also be connected to the anode and cathode of the pulse generator 12 respectively.
[0016] The processing fluid ...
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The invention relates to an electric discharge machining system, a penetration detecting unit and an electric discharge machining method. The electric discharge machining system comprises an electrode, a pulse generator, a machining liquid source, a position control element, a control device and the penetrating detecting unit, the electrode is used for machining a through hole on a workpiece, the electrode and the workpiece can have opposite polarities due to the pulse generator, the machining liquid source supplies machining liquid flowing through the electrode and the workpiece, the position control element can drive the electrode to move relative to the workpiece, and the control device can control the pulse generator and the position control element to machine the workpiece, and the penetration detecting unit detects a penetration stage for machining the through hole according to at least two of components including high-level voltage duration, low-level voltage duration and an average voltage value, and is communicated with the control device to control the penetration stage.
Description
technical field [0001] The present invention relates to an electrical discharge machining (Electro Discharge Machining, EDM) system and method, in particular to an electrical discharge machining system and method for machining a through hole (Through Hole) on a workpiece. Background technique [0002] During electrical discharge machining, electrodes are placed over a conductive workpiece. A non-conductive machining fluid is passed between the electrode and the workpiece. At the same time, the current flows between the electrode and the workpiece to locally erode the workpiece to machine the desired features on the workpiece. In a typical application, electrodes are used to create through-holes in workpieces of any desired shape. [0003] For example, some gas turbines are often machined with small through holes to facilitate the passage of cooling gas. Usually, the process of processing through holes includes a breakthrough stage (Breakthrough Stage). In order to produc...
Claims
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IPC IPC(8): B23H9/14
Inventor 徐惠宇李鹏魏斌彭志学马克.J.格里森约翰.F.茹拉夫卡冷洪滨
Owner GENERAL ELECTRIC CO