Diamond electroplated grinding wheels play a very important role in industrial production. It directly affects whether the manufacturing industry can improve its processing productivity and product surface quality. Next, let’s take a look at the factors that affect the performance of diamond electroplated grinding wheels.
1. Types of diamonds
The diamond grinding tools used to make diamond grinding wheels can be made of natural diamond or artificial diamond.
2. Diamond particle size
The selection of particle size should be comprehensively considered from the following aspects: First, the process requirements, the basic principle is that coarse grinding diamond particles are larger, fine grinding diamond particles are finer; second, the type of binder, generally speaking, the choice of diamond binder Coarse grain, choose fine grain for diamond binder; third, the grinding efficiency of the grinding wheel, generally, choose coarse grain for diamond binder, choose fine grain for diamond binder.
3. Binder type
Diamond bonded grinding wheel bonding agents: There are roughly four types of bonding agents used for diamond bonded grinding wheels, namely resin bonding agent, ceramic bonding agent, metal bonding agent and electroplated metal bonding agent. The order of diamond bonding strength and wear resistance is: electroplating metal bond > metal bond > ceramic bond > resin bond. Resin bonding agents are mostly made of phenolic resin or polyimide resin as the binding material, and are mixed with metal powder, metal oxides, and ordinary abrasives as fillers; the main component of the ceramic bonding agent is a low melting point vitrified material, such as Boron glass, lead glass, etc.; according to the type of main metal powder, metal binders are divided into bronze binders, nickel or nickel-cobalt alloy binders, WC binders, cobalt binders, cast iron binders, tungsten binders, silver binders Alloy binders, etc.; electroplating metal binders mainly include nickel, nickel-cobalt alloy, copper, etc.
4. Diamond concentration
The diamond grinding wheel concentration refers to the percentage of the diamond volume in the working layer to the total volume of the working layer.
The principles for selecting a diamond grinding wheel: First, the finer the particle size, the lower the diamond concentration selected; low concentration workpieces should be selected for fine grinding; secondly, the greater the bonding force of the binder, the more diamond particles that can be firmly bonded. The concentration of the selected binder should be higher; third, it requires a better appearance and a higher concentration of grinding discs and diamonds. For example, shaped grinding wheels, grinding wheels with wide working surfaces, grooved grinding wheels, etc.; Fourth, the quality requirements for abrasives are not high. In order to achieve high grinding efficiency, higher concentrations can be used.
5. Diamond hardness
The hardness grades of diamond grinding wheels are divided into super hard, hard, medium hard, medium, medium soft, soft and extra soft. The hardness selection principles are as follows:
(1) When diamond is grinding hard materials, the abrasive grains are easily blunted. A soft grinding wheel should be selected to make the diamond abrasive grains fall off in time and become self-sharpening. When grinding soft materials, the opposite is true. However, if the material you are grinding is particularly soft and tough, you should choose a softer grinding wheel to avoid clogging the grinding wheel.
(2) When the grinding temperature is high and the cooling conditions are poor, a softer grinding wheel should be used to avoid burning the workpiece.
(3) A grinding wheel with high hardness should be used when the abrasive grains are stressed and easy to fall off. When the surface is broken or the longitudinal feed is large, a grinding wheel with high hardness should be selected. Fourth, when forming grinding and bus bar geometry requirements are high, in order to maintain the outline of the grinding wheel, the hardness of the grinding wheel should be appropriately increased.