Effect of Change in Focal Plane Position on Hole Characteristics of Nanosecond Pulsed Laser Micro Drilled Holes
In laser micro drilling, on changing the focal plane position of the workpiece, there is a significant change in the hole characteristics. This change can be used as an application in some of the industries. In this experiment, the effect of change in focal plane position in the positive, that is upward, direction on the hole parameters is studied and explained. A stainless steel 316 plate is used as the workpiece and a diode-pumped nanosecond pulsed laser is used for micro drilling because of its accuracy and comparatively low cost than picosecond or femtosecond pulsed lasers. It is seen that a significant change in the entry diameter, exit diameter and taper of the hole takes place when the focal plane position is changed. Also, this is carried out at different laser powers.
KeywordsLaser Focal plane Micro drilling Taper
This work has been supported under ISRO RESPOND project grant. The authors are grateful to VSSC, Trivandrum and the management of Vishwakarma Institute of Technology, Pune, India.
- 4.Patwa R, Herfurth H, Christophersen M, Philips BF (2014) Laser drilling for high aspect ratio holes and a high open area fraction for space applications. Taper 200(10):0–05Google Scholar
- 12.Chatterjee S, Mahapatra SS, Sahu AK, Bhardwaj VK, Choubey A, Upadhyay, BM, Bindra KS (2017) Experimental investigation of quality characteristics in Nd:YAG Laser drilling of SS316. In: International conference on materials manufacturing and modelling. ICMMM 2017. VIT, VelloreGoogle Scholar