Using wire electrical discharge machining for improved corner cutting accuracy of thin parts
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The wire electrical discharge machining process (WEDM) allows one to achieved ruled surfaces along intricate contours in hard materials. When one intends to use such a machining process, one has to analyze both the magnitudes of the corners’ radii and the corner’s angles that are formed between adjoining surfaces. Some experimental research work carried out unveiled the systematic occurrence of machining errors when WEDM is used to obtain outside sharp corners, especially in small thickness workpieces. A permanent bending at the crest of sharp corners, which leads to a substantial deviation from the prescribed geometrical shape, was found. The deviation form depends on the magnetic properties of the workpiece material. The research was focused on establishing a means for characterizing this shape error. Moreover, the influence exerted by certain factors, such as the corner angle and the thickness of the workpiece on the above-mentioned machining error was quantified.
KeywordsWire electrical discharge machining Accuracy Corner Shape error
- 4.Gather U, Homberg W, Kleiner M, Klimmek C, Kuhnt S (2002) Parameter design for sheet metal hydroforming processes. Available at: http://www.statistik.uni-dortmund.de/de/content/einrichtungen/lehrstuehle/msind/publikationen/ictp_yokohama_2002_parameter_design.pdf. Accessed: 20 March 2007
- 11.Dodun O (2000) Contributions to the optimization of WEDM. PhD thesis, Technical University “Gh. Asachi” of Iasi, Romania (in Romanian)Google Scholar
- 12.Oprea MC (1994) Growth of the wire electrode technological capacity during wire electrical discharge machining. PhD thesis, Technical University “Politehnica”, Timişoara, Romania, (in Romanian)Google Scholar