Non-traditional Micromachining Processes by Golam Kibria B. Bhattacharyya & J. Paulo Davim

Author:Golam Kibria, B. Bhattacharyya & J. Paulo Davim
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

The surface plot of variation of laser average power and rotating speed of workpiece on surface roughness is shown in Fig. 5.14. The minimum value of surface roughness is obtained at high setting of average power and moderate value of rotational speed of workpiece. It is obvious from this surface plot that the increase in workpiece speed causes the absorbed amount of laser energy per unit scan area is less and it further reduces the amount of material removal from workpiece. This causes fewer irregularities on the machined surface. The surface plot also depicts that when the workpiece rotating speed is high, the surface roughness is less for varying laser average power. According to Eq. (5.4), it is obvious that spot overlap decreases with increasing value of workpiece rotational speed. This causes more waviness in circumferential direction of work sample. Moreover, according to Eq. (5.5), the circumferential overlap increases with workpiece rotational speed and therefore, the value of surface roughness decreases.

Fig. 5.14Response surface plot of surface roughness (Ra) for varying average power and workpiece rotational speed [25]

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.