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การศึกษาพารามิเตอร์การกัดเซาะโลหะด้วยไฟฟ้าบนผิววัสดุเหล็กกล้าแม่พิมพ์ AISI P20 |
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| รหัสดีโอไอ | |
| Creator | 1. กมลพงค์ แจ่มกมล 2. พิชัย จันทร์มณี |
| Title | การศึกษาพารามิเตอร์การกัดเซาะโลหะด้วยไฟฟ้าบนผิววัสดุเหล็กกล้าแม่พิมพ์ AISI P20 |
| Publisher | คณะวิศวกรรมศาสตร์ มหาวิทยาลัยนเรศวร |
| Publication Year | 2554 |
| Journal Title | วิศวกรรมสาร มหาวิทยาลัยนเรศวร |
| Journal Vol. | 6 |
| Journal No. | 2 |
| Page no. | 23-30 |
| Keyword | Electrical Discharge Machine,Pulse Duty Factor,Impulse Duration,Pause Duration,AISI P20 |
| ISSN | 1905-615x |
| Abstract | This paper aims to study the effect of parameter levels on machining process in Electrical Discharge Machining (EDM) of mould steel AISI P20 by using experiment base on pulse duty factor from variable impulse duration and pause duration. In this experiment;the measurement of the effect from the material removal rate (MRR);the electrode wear ratio (EWR) and the surface quality from arithmetical mean roughness (Ra) were investigated. For all the experimental tests;the copper electrode was used as a positive polarity with a diameter of 10 mm;spark the hole with a depth 5 mm on the AISI P20 surface and submerged in dielectric hydrocarbon Shell EDM Fluid 2A. To remove machining debris and heat;the flushing fluid to the machining zone was used at a pressure of 1 kg/cm2 with a flow rate 15 l/min and fixed a discharge current at 8 A. It was found that increment of the impulse duration significantly enhances the MRR and Ra in a polynomial form. However;further increasing the impulse duration over 100 ?s the MRR and Ra are decreases. Meanwhile;it has a reverse effect on the electrode wear ratio. In addition;decreasing the pause duration increases the MRR in a linear form. On the other hand;it has a little effect on the EWR and Ra |
