# Research and Progress on Truing and Sharpening Process of Diamond Abrasive Grinding Tools
## 3 Dressing Method of Diamond Abrasive Grinding Tools
### Truing Technology of Diamond Abrasive Grinding Tools
#### 3.1.3 Grinding Method  
To realize precision grinding and obtain a minimal amount of dressing removal, the grinding method is applied to the dressing of diamond abrasive grinding tools. The grinding method refers to the dressing of diamond abrasive grinding wheels with ordinary abrasive grinding wheels. Grinding methods include the cup-shaped grinding wheel truing method (this method solves the problems of flat abrasive surfaces and increased grinding force during the dressing process), the low carbon steel or mild steel grinding truing method (due to a large number of abrasive grains falling off in the truing process, it is not suitable for high-precision surface truing), and diamond roller truing. Figure 6 shows a schematic diagram of the grinding method dressing; the left side of Figure 6a is a diamond abrasive grinding wheel and the right side is a dressing grinding wheel, both of which rotate counterclockwise. Due to the difference in hardness between the two,  
Figure 5: The micro-morphology of the surface of the diamond abrasive grinding wheel after dressing [11].  
when the dressing grinding wheel and the diamond abrasive grinding tool are ground at the meshing position, the ordinary abrasive grains will cut the bond material to make the abrasive grains fall off and meet the dressing requirements of the diamond abrasive grinding wheel, as shown in Figure 6b.  
[PERSON] [14] employed the high-speed rotating diamond roller to dress the diamond abrasive grinding wheel installed on the grinding machine. This method was simple to operate and could improve the service life of the diamond abrasive grinding wheel. [PERSON] et al. [15] conducted dressing experiments on coarse-grained and fine-grained bronze-bonded diamond abrasive grinding wheels on a surface grinding machine with an abrasive water-jet system and combined abrasive water-jet (AWJ) and contact dressing technology. It was found that the dressing wheel could achieve less grinding force and better surface roughness. [PERSON] et al. [16] found that, compared with the conventional scratch test, the scratch force of the ultrasonic vibration-assisted method decreased significantly and the volume of removed materials increased significantly. As shown in Figure 7 [17], after dressing by the grinding method, the surface of diamond abrasive grains was relatively smooth, the edge angle was sharp, the grinding edge was protruding, and the dressing efficiency of the grinding method was approximately 55\(\sim\)65%.  
The dressing process of truing a diamond abrasive grinding wheel by the grinding method is cumbersome and inefficient and high-precision surface truing cannot be carried out. Given the above problems, researchers have proposed a series of new processing methods, such as the EDM truing method and laser truing method, hoping to obtain a better dressing effect with higher efficiency.  
Figure 6: Schematic diagram of grinding method dressing.  
Figure 7: Surface condition before and after diamond abrasive grinding [17].