# Research and Progress on Truing and Sharpening Process of Diamond Abrasive Grinding Tools
## 5 Conclusions  
* From the perspective of the truing and sharpening of diamond abrasive grinding tools, traditional processing methods, such as the diamond pen dressing method, grinding method, and rolling method, and new dressing methods, such as the EDM dressing method and laser dressing method, were described in detail. In comparison, it was pointed out that the laser dressing of diamond abrasive grinding tools was a green processing method with high efficiency and no environmental pollution.
* Considering the superposition accumulation effect of the serial energy \(Q_{C}\) and coupling of the Fourier heat transfer model, the energy accumulation heat transfer model for laser dressing was established, and numerical simulation of pulsed fiber laser dressing of the bronze-bonded diamond abrasive grinding wheel was carried out. The temperature evolution law of the bronze bond and diamond abrasive grains dressed by pulsed fiber laser was obtained by using the numerical analysis of the model. The numerical analysis showed that, when the laser power density was greater than 1.68 \(\times\) 10\({}^{8}\) W/cm\({}^{2}\), the bronze-bonded diamond abrasive grinding wheel could be sharpened. When the laser power density was greater than 2.52 \(\times\) 10\({}^{8}\) W/cm\({}^{2}\), the truing effect of the diamond abrasive grinding tools was achieved.
* An experiment on the laser dressing of a bronze-bonded diamond abrasive grinding wheel was carried out. The surface topography of the bronze-bonded diamond abrasive grinding wheel was photographed by a three-dimensional ultra-depth-of-field microscope. The results showed that, when the laser power density was 2.52 \(\times\) 10\({}^{8}\) W/cm\({}^{2}\)\(\sim\)3.36 \(\times\) 10\({}^{8}\) W/cm\({}^{2}\), it could not only properly remove the bronze bond, but also better sharpen the diamond abrasive grains. It was confirmed that the laser dressing method could achieve the combination of truing and sharpening of the diamond abrasive grinding tools. The experiment not only demonstrated the correctness and feasibility of the theoretical model but also provided process optimization for research into the pulsed laser dressing of diamond abrasive grinding tools.  
Conceptualization, S.C. and Y.T.; methodology, S.C.; software, S.C. and W.L.; validation, S.C. and W.L.; formal analysis, W.L.; investigation, W.L.; resources, J.S.; data curation, K.D.; writing--original draft preparation, W.L.; writing--review and editing, W.L.; visualization, S.C.; supervision, Y.T.; project administration, Y.T.; funding acquisition, S.C. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the National Natural Science Foundation for Young Scientists of China (Grant No. 51705141); the Research Foundation of Education Bureau of Hunan Province, China (Grant No. 21B0523); the China Postdoctoral Science Foundation (No. 2019T120650, 2018M632835); and the Excellent Young and Middle-aged Scientific and Technological Innovation Team of Colleges and Universities in Hubei Province (Grant No. T2020042).  
Not applicable.  
The authors declare no conflict of interest.