PEMBUATAN MESIN MICRO EDM DIE SINKING PORTABLE SERTA PEMBUATAN MICRO HOLES DENGAN TOOL ELEKTRODA BRASS (KUNINGAN) PADA BENDA KERJA STAINLESS STEEL 204

• Main Authors: , BRANGGAH BANGKIT AJI, , Muslim Mahardika, S.T., M.Eng., Ph.D.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/126606/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=66833
• Institution: Universitas Gadjah Mada

Along with advances in technology, many products are increasingly difficult to do with conventional machining processes. Therefore, nonconventional machining process is used to overcome these constraints. Nonconventional machining processes are widely used is Electrical Discharge Machining (EDM). The manufacturing of CNC (Computer Numerical Control) micro-EDM (Electro Discharge Machining) and micro-ECM (Electrochemical Machining) machine is performed to develop EDM and ECM machines which have been previously existing. This research is calculating of MRR, overcut, depth of cut, and surface roughness in EDM machine. The workpiece used in this experiment were stainless steel. While the tool electrode used in this study is brass. Material removal in erosion form is caused by the presence of an electric spark between the electrode and the workpiece in a dielectric fluid. Electrical spark occurs when the voltage difference between the cutting tool and the workpiece beyond the \"break down voltage\" dielectric gap. The influence of the electric field that exists between the electrode and the workpiece causes movement of positive ions and electrons, respectively toward opposite poles, forming ion channels that are conductive. In these conditions the electric current can flow through ion channels and there was a spark of electricity. In this study, the voltages used are 20, 25, and 30 volts. The result is the average value of the largest MRR obtained at a voltage 30 volts, with a value of 10,78 10 -6 g/s, while the average value of the lowest MRR obtained at 20 volts, with a value of 8,94 10 -6 g/s. The average value of the largest overcut obtained at a voltage of 30 volts, with a value of 0.218 mm, while the average value of the lowest overcut obtained at 20 volts, with a value of 0.106 mm. The average value obtained at the highest depth of cut obtained at a voltage 30 volts, with a value of 102 µm, while the average value of the lowest depth of cut obtained at a voltage 20 volts, with a value of 66 µm. Surface roughness test aims to determine the surface roughness after machining with units of Ra (Roughness Arithmetic). The average value obtained on the Surface Roughness largest 30 volts, with a value of 14.633 µm, while the average value of the lowest surface roughness obtained at 20 volts, with a value of 5,7 µm.