The characteristics of grinding PCD tools

The development of PCD tools and Application prospect

PCD cutting tools are widely used in aviation, aerospace, automobile, electronics and other industries, and can be used for the processing of non-ferrous metal materials and non-metal materials. PCD inserts are suitable for processing non-ferrous metal materials such as Al, Mg, Cu and their alloys and non-metallic materials.

Non-ferrous metal materials and their alloys: such as aluminum, cast aluminum, aluminum alloy, magnesium, magnesium aluminum alloy, silicon aluminum alloy, copper, copper alloy, red copper, brass, tungsten carbide hard alloy, ceramics and other materials, parts such as automobile pistons , Automobile hubs, roller rings and other parts.

Non-metallic materials: such as composite materials, carbon fiber, glass fiber, graphite, glass, reinforced plastics and other materials, such as aircraft wings, carbon fiber auto parts, graphite electrode molds, fiber plates, granite, glass fiber tubes, glass fiber plates, etc.

The main characteristics of PCD blade grinding are:

1. Great grinding force

Diamond is the substance with the highest hardness among known materials, and the wear amount of friction with various metal and non-metallic materials is only 1/50~1/800 of cemented carbide.The hardness (HV) of PCD is 80-120KN/mm2, second only to single crystal diamond, much higher than cemented carbide.When grinding PCD with diamond grinding wheel, the initial cutting strength is very high, which is about 10 times that of cemented carbide (0.4MPa); the specific grinding energy can reach 1.2×104～1.4×105J/mm3;Therefore, the grinding force of PCD  is much higher than that of grinding carbide.

2. The grinding ratio is very small

Due to the high hardness and wear resistance of PCD (the relative wear resistance is 16 to 199 times that of cemented carbide), the grinding ratio of PCD is only 0.005 to 0.033 when grinding PCD, which is about 1/1000 to 1/1000 of cemented carbide.Grinding efficiency is only 0.4～4.8mm3/min .Therefore, in order to ensure the edge quality and removal amount of the PCD cutting tool, the grinding time is very long and the processing efficiency is very low. In addition, when the hardness, content, and particle size of PCD are different, the grinding time is also very different.

3.The particle sizes of PCD have large impact

PCD materials used in cutting tools are mainly divided into three categories according to the particle size: coarse-grained (20-50 μm), medium-grained (about 10 μm) and fine-grained (~5 μm), and the grinding force and grinding ratio vary from several times to dozens times. Coarse-grained PCD has the highest grinding ratio, and the grinding is also the most difficult, and the serrated edge after grinding is the most serious and the quality is the worst, but the wear resistance is the strongest; fine-grained PCD has the lowest grinding ratio, and the grinding is easier, The edge quality is the best after grinding.

Moresuperhard services for grinding PCD tools

Moresuperhard specializes in providing PCD tool sharpening solutions. Moresuperhard  exclusively develops ultra-fine-grained ceramic diamond to meet customers' high-precision PCD sharpening needs.Moresuperhard also supply quality and economic grinding machine including MT198NC,BDM-902,M50,M50CNC grinding machine.if you need PCD tools grinding solutions,please conatct us freely.