Conditioning of vitrified and resin bond CBN grinding wheels using a picosecond laser

Zahedi, Ali; Azarhoushang, Bahman; Akbari, Javad

doi:10.24200/sci.2017.4307

Conditioning of vitrified and resin bond CBN grinding wheels using a picosecond laser

Document Type : Research Article

Authors

Ali Zahedi ¹

Bahman Azarhoushang ¹

Javad Akbari ²

¹ Institute for Precision Machining (KSF), Furtwangen University, 78054 Schwenningen, Baden-Württemberg, Germany

² Center of Excellence in Design, Robotics and Automation, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran

10.24200/sci.2017.4307

Abstract

Laser ablation is a novel non-mechanical wheel preparation method for optimizing the
treatment costs of superabrasive tools. In this study, the thermal effects of picosecond laser radiation
on vitrified and resin bond CBN superabrasive grinding wheel surfaces was analytically and
experimentally investigated. The analytical approach is intended to find threshold process parameters
for selective ablation of cutting grains and bond material. A picosecond Yb:YAG laser device was
integrated with a cylindrical grinding machine which facilitates the treatment of grinding wheel as it
is mounted on the grinding spindle. It has been shown that, the extent of material ablation is defined
by the maximum surface temperature induced by the laser radiation which is in turn defined by the
laser pulse energy. It is also suggested that, the depth of laser thermal effects is governed by the
relative speed of the laser scanner with respect to the wheel surface

Keywords

Picosecond Yb:YAG laser

Vitrified bond

Resin bond

CBN grinding wheel

Laser conditioning

Subjects