What are the characteristics of diamond cutting tools?

Author&#;Huada Quarrying Machine FROM&#;Stone quarry machine manufacturer TIME&#;-05-17

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Introduction as a professional mechanical tool, diamond cutting tools have better performance than other materials. Today, let's talk about the characteristics of diamond cutting tools.

High hardness and wear resistance:

Natural diamond is the hardest material that has been found in nature. Diamond has very high wear resistance. When machining high hardness materials, the service life of diamond cutting tools is 10 ~ 100 times of that of cemented carbide tool, even hundreds of times.

It has very low friction coefficient

The friction coefficient between diamond and some non-ferrous metals is lower than that of other cutting tools, which can reduce the cutting force.

The cutting edge is very sharp:

The cutting edge of diamond cutting tools can be very sharp, and the cutting edge of natural single crystal diamond tools can be as high as 0.002-0.008 μ m. It can carry out ultra-thin cutting and ultra precision machining.

It has high thermal conductivity

The thermal conductivity and thermal diffusivity of diamond are high, the cutting heat is easy to dissipate, and the cutting part temperature of the tool is low.

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It has low coefficient of thermal expansion

The thermal expansion coefficient of diamond is several times smaller than that of cemented carbide, and the change of tool size caused by cutting heat is very small, which is particularly important for precision and ultra precision machining with high dimensional accuracy requirements.

The above is about the characteristics of diamond cutting tools, which are related to the content, I hope to be able to help you.

Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic.

Typically, natural diamonds age for between 1 billion and 3.5 billion years. Most were formed at depths between 150 and 250 kilometers in the Earth&#;s mantle. Some have come from depths of as much as 800 kilometers under high pressure and temperatures, where carbon-containing fluids dissolved minerals and replaced them with diamonds. Much more recently (tens to hundreds of million years ago), they were carried to the surface in volcanic eruptions and deposited in igneous rocks known as kimberlites.

Diamonds have the highest hardness and thermal conductivity of any natural material.

See the diagram below which emphasizes the level of hardness of diamond in comparison to other materials. The material with the next level of hardness is CBN which is less than half as hard as the Diamond.

Hardness is a fundamental property of a material to resist a force applied causing it to deform. Another interpretation of the diamond hardness would be higher wear resistance. It can be easily understood that when diamond is in abrasive contact with another material, the diamond would remove much more stock from the other material, than would be removed from the diamond itself.

Clearly, due to higher hardness, diamond applications can be seen in the cutting tools industry.  Diamonds are used in grinding wheels to grind hard metals, such as tungsten carbide or to cut and shape granite. Diamonds are being used as a cutting tool edge for the machining of non-ferrous abrasive materials, such as composite materials, hard ceramics, high silicone aluminum etc. Diamonds are also being used as a cutting edge in the road-header on excavating machines for roads, tunnels and mining.

The second advantage of the diamond as a cutting tool material is the thermal conductivity.

During machining, the cutting forces generate heat. The heat is distributed among 3 elements: the workpiece, the cutting tool and the removed material chips.

The high thermal conductivity of the diamond will ensure that large amounts of heat energy is dissipated in the tool itself and less to the workpiece. This protects the workpiece from thermal shock or deformation; this is mandatory, for instance, when machining carbon fiber reinforced plastic (CFRP). A higher heat level in the material might cause melting of the resin material while deteriorating the composite material&#;s mechanical properties.

Telcon has been manufacturing in-house cutting tools for more than 35 years and gained vast experience and expertise in the manufacture of Diamond PCD tools and solutions for various applications in the machining of composite materials. All cutting tool solutions (PCD drills, CVD drills, PCD end mills and CVD routers or PCD countersinks) are high quality and high performance, providing long tool life with non-delamination and non-bur issues.

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