How to Choose Diamond Grinding Wheel for PCD Tools

Polycrystalline diamond (PCD) is a polycrystalline crystal obtained by mixing diamond micronized powder of micron size with a small amount of metal powder (such as cobalt) and sintering at high temperature (1400 ℃) and high pressure (6000 MPa). Compared with other tool materials, PCD has the characteristics of extremely high hardness and wear resistance, high thermal conductivity, low thermal expansion coefficient, low friction coefficient, fast heat dissipation, low cutting temperature, low thermal deformation, and reduced surface roughness. However, PCD has a strong affinity with iron elements, so it is not suitable for processing ferrous metals. The common sharpening processes for PCD cutter include diamond grinding wheel mechanical sharpening, electric discharge sharpening, electrolytic sharpening, etc. Among them, the diamond grinding wheel mechanical sharpening is the most mature technology and it is the most widely used at present. This method has low sharpening efficiency and high processing cost, but good tool edge quality and a complete and smooth tools surface can be obtained.
The particle size, concentration and bond of the diamond grinding wheel have a great influence on the quality and efficiency of the PCD tool sharpening. Therefore, the correct choice of grinding wheel is very important. The grinding rate per minute supplied by Glory Diamond Tools is 20 to 30 times that of the ordinary diamond grinding wheel. Under the premise of meeting the processing quality requirements, we should try to choose the grinding wheel with larger granularity.
After selecting the grinding wheel, the grinding wheel needs to be balanced. First, place the wheel balancer on the mirror table for calibration. Adjust the balance baffles in the balancer to the center by adjusting the three balance nuts on the bottom of the balancer. Then slide the grinding wheel into the grinding wheel adjustment rod and adjust the three balance screws on the side of the grinding wheel to make them evenly distributed until the balance blisters in the balancer are in the center again, and the grinding wheel is balanced.
We should clamp and adjust the PCD tools by swing center and optical center. In order to ensure the machining accuracy requirements of PCD tools, all sharpening dimensions should be completed in one setup. During grinding PCD tools, all wear should be removed. In order to make full use of the grinding ability of the grinding wheel and prevent the occurrence of groove marks, the grinding wheel swing amplitude should be selected according to the PCD tool size.
PCD tools is more and more widely used aviation, aerospace, automotive, electronics, stone and other fields, so Glory Diamond Tools is keeping improving quality of grinding wheels to satisfy various grinding and sharpening requirements for PCD tools, like 6A2 grinding wheel, 11A2 grinding wheel, etc.

评论

发表评论

此博客中的热门博文

Resin Diamond Wheel can be Used for Grinding Cemented Carbide Inserts

图片
Milling inserts have the highest precision among carbide indexable inserts, and the peripheral grinding machine are used for peripheral grinding of such inserts. Resin diamond wheel can be used for  peripheral grinding . At present, as for the peripheral grinding machines, the grinding wheel frame not only performs high-speed rotation but also axial swing, so that the grinding wheel is generally not trimmed during the whole grinding process to avoid huge waste. However, when the new grinding wheel is mounted on the flange, there is a coaxiality error between the grinding wheel and the flange. Therefore, when new resin diamond wheel is used for the first time, the grinding wheel should be trimmed so that the grinding wheel, the flange and the main shaft could rotate on the same axis. In this way, the wheel could have the correct geometry. Since the grinding wheel is expensive and generally not trimmed, the grinding wheel should be ensured uniform wear throughout the whole use process
阅读全文

Analysis about Diamond Wheel for Glass Beveling Grinding

图片
Straight-line beveling grinding of glass and mirrors is widely used in the architectural and glass furniture industries. The completion of the straight line bevel grinding production process for glass and mirrors is inseparable from the diamond grinding wheel. Studying and analyzing various elements of the diamond grinding wheel for beveling glass grinding the beveled glass are significant for saving energy and improving efficiency in deep processing of glass. The process of beveling glass grinding with diamond wheels is very complicated. During the grinding of the glass by the diamond wheel, the diamond abrasive grains are irregularly distributed on the surface of the grinding wheel. The manufacturing precision of the diamond grinding wheel itself also affects the end face runout and radial runout during beveling glass grinding process, which will affect the surface roughness of the glass. High-strength diamonds are indeed effective in increasing the sharpness of diamond wheels. In
阅读全文