1. Experimental and numerical investigation of the effect of spray cutting fluids in high speed milling Advisor: 戴子堯 Advisee: 呂政泰 Number: M9510244 Date ﹕ 2007-06-12 微細放電加工學

2. Outline 1. Experimental design 2. Emulsion Oil of parameter 3. Position of the nozzle relation 4. Experimental result 5. Conclusions

3. Experimental design The MQL system detailed design pressure regulator frequency meter pump nozzle

4. Emulsion Oil of parameter Characteristics of the used lubricants : emulsion coolant and biodegradable oil ， without water mixture Table 1

5. Position of the nozzle relation Other relation positions have been rejected because of possible interference between the workpiece and the MQL flow.

6. Experimental result(1/4)

7. Experimental result(2/4) These different tool wears are due to the fact that in the 45° position the cutting fluid does not completely penetrate in tool edges ， on the contrary ， the 135° position allows the MQL jet reaching the tool edges.

8. Experimental result(3/4) 45°of experimental result

9. Experimental result(4/4) 135°of experimental result

10. Conclusions 1.The emulsion coolant is inefficient in high speed milling ， because it is not able to reach the inner zones of the tool teeth. 2.The MQL flow penetrates in the cutting zone and it acts in three different ways ， that is ， cooling tool and workpiece ， lubricating and removing the chips. 3. 使用 MQL 流率系統，在模擬狀況下，冷卻液消耗率為 0.06 ㎝ 3 /min 相當於每小時才消耗 3.6 ㎝ 3

11. Thanks for your attention END