1. Resin diamond grinding wheel for grinding cemented carbide workpieces, such as resin diamond grinding wheel D300*T25*H127*X10, particle size 120#, wet grinding of cemented carbide, the recommended grinding wheel speed, feed amount, and feed speed.

Answer: The grinding wheel speed is lower than 35m/s, usually around 30m/s; the feed amount is generally 1 to 2 wires, depending on different grinding conditions;

2. Bakelite matrix, the English name is Bakelite. Compared with aluminum matrix, what are the advantages of steel matrix?

Answer: The bakelite matrix is formed by hardening phenolic resin and aluminum. It is light in weight, elastic and has good thermal conductivity.

3. Metal-bonded grinding wheels are already known to be trimmed by electrical machining. Can they also be sharpened with corundum oilstones?

Answer: Yes. In fact, there are many ways to process, such as electric machining, grinding, electrolytic grinding, free grinding, etc. Generally, corundum or oilstone can be used. It should not be too hard, and the trimming cannot be done too hard. There are also trimmed parts. The grinding wheel speed must be low.

4. Metal sintered drill bits are used for glass drilling. What is the recommended concentration?

Answer: This has something to do with granularity. For sintered drill bits of 80/100, if the concentration requirements of the drilled rock layer are relatively high, the harder the drill bit, the higher the concentration, and the softer the drill bit, the lower the concentration. Generally it is between 50-70.

5. What types of materials are suitable for resins, ceramics, metals, and different binders?

Answer: The resin bond has weak holding power and is easy to fall off. Generally, type 1 material (RVD material) or resin polycrystalline diamond is used (the synthesis time is short, and more aggregates are formed); for ceramics, type 1 is generally better. Material, type one and a half or type two, but it is not too durable. Normally it is type two yellow material, and it is best to use type two material; metal binders are generally types 2, 3, and 4, and the formula of metal binders includes copper There are many types of base, cobalt base, nickel base, tungsten carbide base and composite base. Generally speaking, the stronger the holding power, the higher the grade of diamond used in the bonding agent. Metal binders are divided into metal sintering and bronze binders (bronze binders are 8515 and 8020 copper-tin alloys) with relatively low hardness. The higher ones are iron-based, nickel-based, cobalt-based, and the higher ones are tungsten carbide-based.

6. The influence of the linear speed of the grinding wheel on the use effect of the grinding wheel

Answer: There is an optimal value for the linear speed of the grinding wheel. Generally speaking, if the speed is too low, the grinding will be too large and the bond will wear out quickly; if the speed is too high, the vibration of the machine tool will be large and it is not good for diamonds. Proper is best. The average diamond grinding wheel is about 35m/s.