Advantages and disadvantages of electroplated diamond abrasive tools

Advantages and disadvantages of electroplated diamond grinding tools Difference between electroplated diamond sanding pads and resin diamond grinding tools

Electroplated diamond abrasive tool is a diamond abrasive tool made by electrochemical method. The working layer of the abrasive tool contains diamond abrasive particles, and the diamond abrasive is bonded to the substrate by a metal bond. First, the thickness of the metal bond is 20% of the height of the diamond abrasive grains (sanding), and then the diamond abrasive grains are bonded (thickened) with the metal bond, and the thickness is about 2/3 of the height of the abrasive grains. Including diamond dressing tools, diamond tools for grinding or cutting.

Advantages of electroplated diamond abrasive tools

①The electroplating process is simple, the investment is low, and the manufacture is convenient;

②No need to trim, easy to use;

③The single-layer structure determines that it can reach a high working speed, which is currently as high as 250-300m/s abroad;

④Although there is only a single layer of diamond, it still has enough life;

⑤ For abrasive tools with high precision requirements, electroplating is the only manufacturing method.

Because of these advantages, the high-speed and ultra-high-speed grinding of electroplated abrasives occupies an undisputed dominant position.

Defects in electroplated diamond abrasives

There is no strong chemical metallurgical bond between the coating metal and the substrate and the abrasive bonding surface. The abrasive is actually only mechanically embedded and inlaid with the coating metal, so the holding force is small, and the diamond particles are under heavy load. ) and lead to the overall failure; in order to increase the holding force, the thickness of the coating must be increased, as a result, the exposed height of the abrasive particles is reduced, the chip space is reduced, the abrasive tool is prone to blockage, the heat dissipation effect is poor, and the surface of the workpiece is prone to burns. At present, the domestic electroplating abrasive tool manufacturing has not yet realized the optimal design of the best topography of the grinding tools according to the processing conditions.

The difference between resin diamond grinding tools and electroplating diamond grinding tools

Due to the difference in the binder, the resin diamond abrasive tool mainly uses phenolic resin and a small amount of metal powder as the binder, while the electroplated diamond abrasive tool is a kind of grinding tools that deposits the nickel-cobalt alloy on the surface of the metal substrate and fixes the diamond abrasive by the method of electrodeposition. Production process, their main differences in performance are:

1. In terms of processing efficiency, since electroplated abrasives use higher grade abrasives and have only one layer of abrasives, they have their own advantages in terms of heat dissipation performance, etc., so electroplated diamond abrasives have higher processing efficiency;

2. In terms of service life, electroplated abrasives have only one layer of abrasive, so the service life of electroplated grinding tools will be inferior to that of resin diamond abrasives;

3. In terms of machining accuracy, the surface roughness of the workpiece is affected by the same particle size, and the surface roughness of the electroplated abrasive tool is worse.