The electroplated diamond grinding wheel layer contains diamond abrasive and filler, which are bonded to the substrate through metal binder. The thickness of metal binder is less than 1 / 2 of the height of diamond abrasive particles. Remove the filler by mechanical method; Thirdly, the diamond abrasive particles are bonded with metal bond, and the bonding thickness is as required.
The particle size of the filler used in the creation is 1.5 ~ 5.0 times that of diamond abrasive particles. The manufacturing process of electroplated diamond grinding wheel is simplified and the diamond concentration can be adjusted.
The known manufacturing methods of electroplated diamond grinding wheel are as follows:
The working layer of the grinding wheel contains diamond abrasive particles, which are bonded to the substrate through metal binder. The thickness of metal bond is diamond grinding.
20% of the particle height, and then bond the diamond abrasive particles again with a certain thickness of metal binder. The thickness of this layer of metal binder is about 2 / 3 of the abrasive particle height. The disadvantage of this method is that the diamond concentration on the working surface of the abrasive tool (i.e. the dispersion density of diamond on the surface of the abrasive tool) is too large.
A known method for adjusting the diamond concentration on the working surface of electroplated grinding wheel is as follows:
Diamond abrasive particles are pre mixed with fillers, which can be salt.
Dissolution method, lifting method (salt and glass ball) or magnetic field method (magnet particles). In this creation, the size of filler particles roughly matches the size of diamond abrasive particles. The amount of filler shall make the diamond on the working surface of diamond grinding tool reach the specified concentration. The disadvantage of this manufacturing method is that the removal of filler is very complex and requires special methods. In addition, salt solution will appear when removing salt particles. Strong acid needs to be used when removing glass balls, which is unfavorable to the ecological environment. The magnetic field needs to be established when removing magnet particles; In addition, the magnet particles have external conductivity, so in the bonding process, these magnet particles can be covered with a layer of metal bond. The removal of magnet particles seems to be a big problem.
There is another method for manufacturing electroplated diamond grinding wheel:
Diamond particles are mixed with filler, the filler is spherical particles, and the outer surface is lubricated; Put the mixed diamond particles and filler on the outer surface of the substrate, and then bond them with metal binder, so that the thickness of bonded abrasive layer and filler layer does not exceed 1 / 2 of the height of diamond particles; Then brush off the filler with a brush; The final metal bond is used to re bond the diamond left on the substrate, and the bonding thickness meets the requirements of the rules. The method creates a prototype for this purpose. The quantity ratio of diamond abrasive particles to filler particles in the prototype is determined by the concentration of diamond particles on the working surface of the grinding wheel product, and the size of filler particles and diamond particles is roughly appropriate.