Dressing of Hybrid Bond CBN Wheels Using Short-Pulse Fiber Laser

Abstract

A systematic research analysis has been applied to study the effect of dressing parameters on grinding forces, work piece roughness and wheel wear of a hybrid bond CBN grinding wheel. This paper presents some of the results achieved by the comparison between a conventional SiC dressed wheel and a grinding wheel dressed by means of a short-pulse fiber laser. The results show high technological potential for the laser dressing method compared to conventional dressing. Lower grinding forces and specific energy, with relatively the same surface roughness and lower total grinding wear (wear by dressing plus wear by grinding) are the biggest advantages of the laser dressing method over the conventional method. However, the economic aspects of laser dressing (investment on laser source and associated add-ons) at the moment, cannot justify the integration of such systems on the grinding machine for all types of applications. The next challenge is optimization of the laser dressing process to increase the efficiency of the process and expand the possible applications both from a technical and commercial point of view.

Study on methods of enhancing the quality, efficiency, and accuracy of pulsed laser profiling

“…In this experiment, a long laser pulse ( = 210 ns) was used, leading to significant thermal effects during profiling and higher surface temperatures of the grain. When the temperature reached approximately 800 • C, the diamond began to react with oxygen in the air and turned into graphite, as shown in (2). This relationship explains the higher graphitization with higher laser power.…”

“…In the radial direction, the laser beam can sharpen but cannot accurately shape the grinding wheel. To address this issue, Walter et al [1][2][3] conducted experiments on tangential laser profiling of a hybrid-bonded (metal-vitrified) cubic boron nitride (CBN) grinding wheel and demonstrated the feasibility of tangential laser profiling. However, conclusions were not reached concerning the degree of surface profile accuracy that could be achieved.…”

Abrasive machining of advanced aerospace alloys and composites

“…18), leading to improvements in terms of grinding performance. For instance, lower grinding forces were recorded (up to 1.5 times for the normal component) following laser dressing as opposed to conventional wheel dressing [183]. While such techniques have been successfully demonstrated under research/laboratory conditions, further validation trials within semi-industrial environments are imperative to allow for more robust evaluation prior to transfer onto actual production lines.…”

The grinding performance of a laser-dressed bronze-bonded diamond grinding wheel

“…However, after more than 20 years of development, laser dressing remains in the experimental stage, and the number of researchers and published results in this field are limited. Based on statistics compiled by our group (from searching the Web of Science database), only 15 research organizations in six countries (India [1][2][3][4], Germany [5][6][7], China [8][9][10], USA [11][12][13], Switzerland [14][15][16], and Iran [17]) have been developed, and approximately 30 SCI publications on laser dressing have been published (including auxiliary laser dressing).…”