Machining the tool to put forward new requirements

Machining the tool to put forward new requirements

Machining the tool to put forward new requirements
Raise the level of the machining industry, the tool proposed new requirements. In addition to improve the service life also requires reduce cutting pollution, as far as possible using dry cutting. Which only contains a rust inhibitor without organic matter, and this could make the recycling of greatly reducing the cost can not be completely abolished the cutting fluid, as far as possible.
Should be said that in recent decades the rise of the various vapor deposition techniques, surface engineering technology research and application have made rapid development. These technologies not only to achieve the requirements of the mechanical properties such as wear, friction reduction and corrosion resistance, but also play an active role in the field of electromagnetism, optics, optoelectronics,iron forging. thermal, superconducting and biology related to the surface of functional materials. Surface engineering is not only cheap metal materials play a greater advantage in terms of performance and effectiveness of, and has become an important means to develop new types of coatings and thin film materials with great application potential. The working status of the diversity and
cutting tool characteristics determine the choice of different tool coatings in Jiangsu. Turning and drilling, milling should consider the characteristics of intermittent shocks. The early development of the coating to wear as the main focus, in order to improve the hardness of the key indicators. Such as represented by the titanium nitride coating has a higher coefficient of friction (0.die cast aluminum.4 to 0.6), processing and constant friction between the workpiece will have a lot of heat.
“In order to avoid the tool overheating deformation affecting the machining accuracy and extend their useful life, typically use a cutting fluid.” The experts said, to resolve to reduce or waive the problems brought about by the cutting fluid, tool coating should not only be the tool has a long life and should be self-lubricating function. Diamond-like carbon coating (DLC) shows advantages in the machining of some materials (Al, Ti and its composite materials), but after years of research show that the internal stress of DLC coating, thermal stability and SP3 structure SP2 transition and three shortcomings, it is currently only used in processing non-ferrous metals, which limits its further application in the machining ferrous metal catalyst effect. But in recent years, studies have shown that SP2 structure-based diamond-like carbon coating (also known as the class of graphite coating) Hardness 20 ~ 40GPa, but do not exist and ferrous metals from the catalyst effect, its coefficient of friction low and good moisture resistance, cutting can be used coolant can also be used for dry cutting their life than non-coating knife has increased exponentially, the processing of steel does not exist, thus causing the coating to the tool manufacturers pole great interest. Given time, this new DLC coating has been widely used in the cutting area.


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