%0 Journal Article
%T Karakteristik Penetrasi dan Laju Pembuangan Material Non Metal pada Proses Drilling dengan Water Jet Machining Sebagai Variasi Stand of Distance
%A Suhardjono
%A Bambang Pramujati
%J Jurnal Teknik Mesin
%D 2010
%I Universitas Kristen Petra
%X For commercial application, Water Jet Machining (WJM) needs at least of 300 hp extra high pressure pump to increase water pressure up to 60.000 psi, which produce water jet velocity as high as 3 Mach (three times sound velocity) in order to cut a carbon fiber composite for aero plane component. However, this research only develops a model to learn the characteristic of machining process of WJM. The model used a 3 kW pump, which produced water pressure as high as 150 bar (2175 psi). A brick is chosen to be tested, while this material can be measured the response of the depth of penetration, the hole diameter and the metal removal rate, so that the brick have the best characteristic to learn the drilling process of WJM. This research is focused to learn how the effect of stand of distance (SOD) parameter. Stand of distance is defined as the distance between nozzle and work piece surface. The characteristics to be investigated are the effect of SOD on the depth of penetration, on the hole and on material removal rate for drilling process with WJM. The result shows that the effect of SOD has a parabolic tendentious curve not only on the depth of penetration and the hole but also the metal removal rate. For drilling process with 10 second drilling time and 1 mm nozzle diameter rise the depth of penetration from 34 mm up to 48 mm or increased 41% for SOD between 5 mm and 15 mm, but for the SOD 15¨C35 mm fall the depth of penetration down to 18 mm or decreased 62.5%. The SOD between 5 mm and 15 mm shows that the rate of material removal goes up from 54.5 mm3/s to 110 mm3/s or practically double, conversely the SOD 15 ¨C 35 mm the material removal rate drops to 18 mm3/s or falling down of 83.63%. On the other hand the drilling time has a linear relationship to the depth of penetration. in Bahasa Indonesia: Untuk penggunaan komersial, WJM membutuhkan pompa tekanan ekstra tinggi dengan daya minimal 300 hp yang akan menaikkan tekanan air hingga 60.000 psi, dimana tekanan sebesar ini akan menghasilkan kecepatan semprotan air hingga 3 Mach (tiga kali kecepatan suara) sehingga dapat memotong material komposit dari serat karbon untuk komponen pesawat tempur anti radar. Namun demikian, penelitian ini hanya mengembangkan sebuah model untuk mempelajari karakteristik proses pemesinan WJM. Model hanya menggunakan pompa dengan daya 3 kW yang menghasilkan tekanan air sebesar 150 bar (2175 psi). Sebuah batu bata merah dipilih untuk dicoba, karena material ini dapat diukur responnya, yaitu kedalaman penetrasi, diameter lubang dan laju pembuangan material, oleh karena itu batu bat
%K Water Jet Machining
%K stand of distance
%K drilling
%K depth of penetration
%K Material removal rate.
%U http://puslit2.petra.ac.id/ejournal/index.php/mes/article/view/18036