Obrábění oceli 1.2363 a 1.2343ESR užitím EDM

Machining of 1.2363 and 1.2343ESR steels using EDM

článek v časopise ve Web of Science, Jimp

en

Electrical discharge machining (EDM) is an unconventional machining technology. It is commonly used in toolrooms to remove the material of the workpiece which in turn gains a negative shape of the electrode – the tool.In order to monitor and model the responses in the form of eroding rate and surface quality, a two-level half-factor experiment was performed with one replication at the corner points and two replications at the central points, for a total of 80 rounds. Both graphite and copper electrodes of sizes 10x10 mm and 100x100 mm were used for eroding and the influence of parameter settings: Open-voltage, Pulse current, Pulse on-time and Pulse off-time was monitored. It was foundthat the shape of the electrode and Pulse current have the most significant effect on the erosion rate.The parameters Pulse current, Pulse on-time and their mutual interaction significantly affect the surface roughness. Statistically significant factors influencing the occurrence of defects turned out to be Pulse current, Pulse on-time and Material of workpiece, where it can be seen that the material 1.2343ESR is significantly less prone to the formation of surface defects.

Elektroerozivní obrábění (EDM) je nekonvenční technologie obrábění. Běžně se používá v nástrojárnách k odstranění materiálu z obrobku, který následně získá negativní tvar elektrody – nástroje. Aby bylo možné sledovat a modelovat odezvy ve formě rychlosti erodování a kvality povrchu, dvouúrovňová polovina -faktorový experiment byl proveden s jednou replikací v rohových bodech a dvěma replikacemi v centrálních bodech, celkem 80 kol. K erodování byly použity grafitové i měděné elektrody o rozměrech 10x10 mm a 100x100 mm a byl sledován vliv nastavení parametrů: Open-voltage, Pulse current, Pulse on-time a Pulse off-time. Bylo zjištěno, že nejvýraznější vliv na rychlost eroze má tvar elektrody a pulzní proud. Parametry Pulzní proud, Pulzní doba zapnutí a jejich vzájemná interakce významně ovlivňují drsnost povrchu. Statisticky významné faktory ovlivňující výskyt vad se ukázaly Pulse current, Pulse on time a Materiál obrobku, kde je vidět, že materiál 1.2343ESR je výrazně méně náchylný ke vzniku povrchových defektů.

Electrical discharge machining (EDM) is an unconventional machining technology. It is commonly used in toolrooms to remove the material of the workpiece which in turn gains a negative shape of the electrode – the tool.In order to monitor and model the responses in the form of eroding rate and surface quality, a two-level half-factor experiment was performed with one replication at the corner points and two replications at the central points, for a total of 80 rounds. Both graphite and copper electrodes of sizes 10x10 mm and 100x100 mm were used for eroding and the influence of parameter settings: Open-voltage, Pulse current, Pulse on-time and Pulse off-time was monitored. It was foundthat the shape of the electrode and Pulse current have the most significant effect on the erosion rate.The parameters Pulse current, Pulse on-time and their mutual interaction significantly affect the surface roughness. Statistically significant factors influencing the occurrence of defects turned out to be Pulse current, Pulse on-time and Material of workpiece, where it can be seen that the material 1.2343ESR is significantly less prone to the formation of surface defects.

hloubení EDM; ocel 1.2363; ocel 1.2343ESR; plánovaný experimentt; trhliny; parametry obrábění

die- sinking EDM; steel 1.2363; steel 1.2343ESR; design of experiment; cracks; machining parameters

08.06.2023

Springer nature

1806-3691

45

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