The mechanism and application of bronze-bond diamond grinding wheel pulsed laser dressing based on phase explosion

Abstract

This paper presents a theoretical analysis of the surface bond removal mechanism for bronze-bond diamond grinding wheels using a pulsed laser. For the first time, the existence of a phase explosion phenomenon during the process of grinding wheel laser dressing is proposed, and the negative effects of a phase explosion on laser dressing are analyzed. Additionally, a theoretical study on phase explosion is conducted. The mechanism of bronze-bond diamond grinding wheel laser dressing is improved, and theoretical guidance for bronze-bond diamond grinding wheel laser dressing is provided. In the experiment, the processing parameters of the laser during phase explosion are studied, and a grinding test under the corresponding conditions is conducted. A highspeed camera is used to observe phase explosion in the laser dressing process. An ultra-depth 3-D microscope system is used to observe the topography of the bronze-bond diamond grinding wheel after dressing and grinding as well as the bronze wheel surface quality. It is concluded that to avoid phase explosion from occurring in the laser dressing of the bronze-bond grinding wheel, chip space around the bond must exist for the abrasive particle protrusions. The processing parameters of laser dressing under certain condition are optimized, and the desired dressing effect is achieved.

Research and application of surface heat treatment for multipulse laser ablation of materials

“…Combined with the experimental analysis in Figures 10 and 11, under the relevant conditions, dressing of a bronze-bonded diamond grinding wheel can be performed at laser powers less than 25 W; the truing and dressing of a bronze-bonded diamond grinding wheel can be merged at laser powers between 25 W and 30 W; and great-depth dressing of a bronze-bonded diamond grinding wheel can be realised at laser powers greater than 30 W. According to the literature [24], the diameter of the abrasive particles is approximately 106~150µm. When the protrusion height of the abrasive particles is 20%-30% of the particle diameter, the grinding wheel after dressing will exhibit good grinding properties; i.e., the optimal protrusion height of the abrasive particles should be 1/3 of the particle diameter.…”

“…The removal efficiency of the bronze material was relatively low at the laser powers of 20 W and 25 W, which are suitable for laser micro-dressing of a bronze grinding wheel. According to the literature[24], the grit diameter is ~106-150 µm. When the grit projection height accounted for 20-30% of the grit diameter (i.e., 20-45 µm), the grinding wheel had good performance after conditioning.…”