Open Access Open Access  Restricted Access Subscription or Fee Access

Experimental Investigation on Machining of AISI 1045 Stainless Steel by using Cryogenic Cooling of Micro EDM Drilling Process

N. Sulakshna, V. Chittaranjan Das

Abstract


In this experimental work, the cryogenic cooling of the Micro-EDM (µEDM) drilling process for improving the performance and quality of micro holes. The controllable parameters such as the current (Ip), pulse on time (Ton), Pulse off time (Toff) and gap voltage (Vg) were chosen for further investigation. The Taguchi L27 orthogonal array is preferred to achieve the best experimental runs. Case hardened AISI 1045 stainless steel is selected to perform the experiments. The overall machining performances of geometrical characterization such as taper angle, Overcut, Circularity at the entry and exit and the performance evaluation such as the material removal rate and electrode wear rate are analyzed. It is found that the taper angle improved by 78.7%, overcut improved by 2.9% to 49.7%, Circularity improved up to 76.3% and 79.2% respectively, material removal rate increased from 3.9% to 66.2% and electrode wear rate reduced up to 70.3%. It is found that pulse off time plays a vital role in the quality of micro holes drilled in both conventional and cryogenic micro-EDM (CµEDM) processes.


Keywords


Micro-EDM (µEDM) drilling, material removal rate, electrode wear rate

Full Text:

PDF

References


Abdulkareem, S., Ali Khan, A., Konneh, M ., 2010. Cooling Effect on Electrode and

Process Parameters in EDM . M ater. M anuf.Process. 25, 462–466.doi:10.1080/

Abdulkareem, S., Khan, A.A., Konneh, M ., 2009. Reducing electrode wear ratio using

cryogenic cooling during electrical discharge machining. Int. J. Adv. M anuf. Technol.

, 1146–1151. doi:10.1007/s00170-009-2060-5.

D’Urso, G., M accarini, G., Ravasio, C., 2014. Process performance of micro-EDM

drilling of stainless steel. Int. J. Adv. M anuf. Technol. 72, 1287–1298.

doi:10.1007/s00170-014-5739-1.

D’Urso, G., M erla, C., 2014. Workpiece and electrode influence on micro-EDM

drilling performance. Precis. Eng. 38, 903– 914.doi:10.1016/j.precisioneng.

05.007.

Jafferson, J.M ., Hariharan, P., 2013. M achining Performance of Cryogenically

Treated Electrodes in M icroelectric Discharge Machining: A Comparative

Experimental Study. M ater. M anuf. Process. 28, 397–402. doi:10.1080/10426914.

763955.

Kumar. S, V., Kumar. M , P., 2014. Optimization of cryogenic cooled EDM

process parameters using grey relational analysis. J. M ech. Sci. Technol. 28,

–3784. doi:10.1007/s12206-014-0840-9.

Liqing, L., Yingjie, S., 2013. Study of dry EDM with oxygen-mixed and cryogenic

cooling approaches. Procedia CIRP 6, 344–350. doi:10.1016/j.procir.2013.03.055.

Siva, M ., Parivallal, M ., Kumar, M .P., 2014. Investigation on the effect of process

parameters in micro electrical discharge machining 5, 1829–1836.

doi:10.1016/j.mspro.2014.07.470.

Srivastava, V., Pandey, P.M ., 2013. Study of ultrasonic assisted cryogenically

cooled EDM process using sintered (Cu-TiC) tooltip . J. M anuf. Process.15, 127–

doi:10.1016/j.jmapro.2012.12.002

Srivastava, V., Pandey, P.M ., 2012. Performance Evaluation of Electrical

Discharge Machining (EDM ) Process Using Cryogenically Cooled Electrode.

Mater. Manuf. Process. 27, 683–688. doi:10.1080/10426914.2011.602790.

Srivastava, V., Pandey, P.M ., 2012b. Effect of process parameters on the performance of EDM process with ultrasonic cryogenically cooled electrode.

J. Manuf. Process. 14, 393–402. doi:10.1016/j.jmapro.2012.05.001.

Tong, H., Li, Y., Zhang, L., Li, B., 2013. Mechanism design and process control

of micro EDM for drilling spray holes of diesel injector nozzles. Precis. Eng.37,

–221.doi:10.1016/j.precisioneng.2012.09.004.


Refbacks

  • There are currently no refbacks.