PCD cutting tools are cutting tools made of polycrystalline diamond materials. The development of these tools from birth to application has gone through several decades. Due to the advantages of high hardness, high thermal conductivity, low thermal expansion coefficient, high elastic modulus, and low friction coefficient, PCD cutting tools are now widely used in various industries. Today, we will talk about: what materials are PCD cutting tools suitable for processing? How to grind PCD cutting tools?
PCD cutting tools are sintered into milling cutters by gathering diamond micro-powder with metal binders such as cobalt under high temperature and ultra-high pressure conditions. These tools are used for milling and are generally used to process platinum, gold, silver, aluminum, aluminum alloys, copper alloys, synthetic fibers, carbon fibers, glass, plastics, wood, and composite materials.
The high hardness and wear resistance of PCD cutting tools make them difficult to grind. However, many scholars have conducted many experiments on this problem and have achieved certain results. The most ideal method currently used is to use diamond grinding wheels or diamond grinding to grind them. However, tool sharpening for PCD cutting tools has requirements. Generally, the following three requirements are needed: The machine tool has good process system rigidity, the machine tool has a short-stroke oscillating mechanism with adjustable stroke and speed, and the machine tool's tool holder has high-precision rotary function and online detection device.
For PCD cutting tools, you may have some understanding of their classifications and uses, but you may not necessarily know the reasons for their wear. Diamond cutting tools have significant differences in structure, preparation methods, and application fields, so they are also subject to wear. The reasons for wear are as follows:
In cutting, PCD cutting tools will form a new metamorphic layer on the surface of the tool when the temperature continuously rises, and it reaches the temperature of the thermochemical reaction. This is one reason why some diamond cutting tools wear.
Of course, some PCD cutting tools, due to the C atoms of diamond crystals obtaining enough energy to escape from the lattice, gradually form wear on the lattice plane, which leads to wear of PCD cutting tools.
When PCD cutting tools cut non-ferrous metals, the diamond crystal and the metal lattice atoms of the workpiece permeate each other, producing diamond dissolution. When PCD cutting tools cut different materials, they have different dissolution rates. The greater the dissolution rate, the faster the wear of PCD cutting tools.
In conclusion, the above is a brief introduction to the reasons for the wear of PCD cutting tools. However, the development of PCD cutting tools follows the development of the market and fully solves the needs of users. This is the key to the use of PCD cutting tools by users. In recent years, with the development of the automotive market, more and more materials will be used in automotive manufacturing. An advanced PCD cutting tool will play a stronger role in the market of diversified manufacturing materials and will bring practical profits and competitiveness to related manufacturing enterprises.
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