Thin-walled electrode surface finishing

After finishing the curved surface, finish the thin-walled shape. If you machine the outline first and then the top curved surface, the thin-walled shape will be too high at this time. Under the action of the cutting force of the tool, the top of the copper electrode will often deform and bend, causing Processing failure is also the most common problem in sheet electrode processing. At the same time, due to the 5.0mm narrow groove between the sheets, only smaller diameter tools can be used to process the shape of the sheets. Therefore, an end mill with a diameter of 4.0mm is used, the rotation speed is 2000r/min, and the feed speed νf=400mm/min. After processing the curved surface and then processing the electrode shape, it is also necessary to pay attention to the cutting depth each time. The tool diameter is small and the clamping The length is longer (greater than the electrode height, which is 26.0mm). Therefore, it is easy to cause over-cutting by grabbing the knife; the amount of cutting on the back of each layer is only 0.4mm; while the rotation speed and feed speed should be higher to achieve a certain efficiency.

1. Setting of specific paths

Among them, the shape machining allowance parameter (XYstocktoleave) is -0.1mm, which is the spark machining gap reserved for the electrode. The tool lift selection parameter (Keeptooldown) is selected to not lift the tool. Because the tool is cut outside the contour, it has been determined that the tool is cut in a safe empty position, so there is no need to set the tool lift to save tool idle running time and improve efficiency.

2. Process route planning

The process route planning of curved thin-walled electrode processing plays a decisive role in the success or failure of the processing. The same processing method and parameter settings are carried out in different processing sequences, and the results obtained are completely different. Process plan: rough milling of the shape, frame processing → contour roughing of the curved surface → finishing of the curved surface → finishing of the thin-walled shape.

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