The number of ceramic hard films developed by PVD technology is increasing, including titanium nitride, titanium carbonitride, titanium carbide, aluminum oxide, diamond-like films, and aluminum nitride titanium. Such ceramic hard films are currently applied to tools or molds, which not only improve the wear resistance of the tool surface, but also the toughness of the metal substrate. With the recent breakthrough in machine tool technology, cutting has been speeding up to shorten the cutting time and improve the surface precision of the workpiece.
“The number of high-speed and high-efficiency CNC machine tools and machining centers in the domestic manufacturing industry is increasing rapidly, and a large number of highly efficient and advanced tools are needed.†Luo Baihui, secretary general of the International Model Association, said that modern high-efficiency and advanced tools will gradually become the mainstream in the market. Some advanced machinery manufacturers have proposed to the tool factory to supply certain high-efficiency advanced tools and high-efficiency special tools. However, due to the lack of mental preparation and technical preparation of the tool factory, the supply has not been met (or only a small supply). The requirements of machinery manufacturers, so these factories use a large number of imported tools and foreign tool companies' products, and this situation needs to be changed, and only in this way can the tool out of control market be well controlled.
Luo Baihui said that the current development trend of machine tools is high speed, high precision and high quality. High-speed operation requires higher surface treatment requirements for molds, cutting tools, and mechanical parts. Extending the service life, reducing production costs, and creating higher profits are the common goals pursued by the industry.
In order to cope with high-speed machining and save a lot of processing time and cost, tool improvement has become an important factor. Tungsten carbide tools are increasingly used in the tool market due to their high wear resistance and hardness.
In order to obtain the best benefits during processing, proper surface treatment must be selected. Medium and heavy-duty molds must be CVD high-temperature titanium, supplemented by precision vacuum heat treatment to achieve acceptable deformation. This part is often used for cold forging dies, hydraulic drawing dies, tungsten carbide drawing lines, and suction pipes. In the application of tools, molds and mechanical parts with medium, low load or precision requirements, it is appropriate to use low temperature (150 ° C ~ 500 ° C) PVD titanium plating.
At present, the tool structure is out of balance, and the production tool is not in line with the demand. For example, users need a large gap in cemented carbide tools, but high-speed steel tools are over-produced; modern manufacturing urgently needs high-efficiency tool gaps, but low-grade standard tools are over-produced.
In developed countries, cemented carbide tools have now dominated the tool, accounting for 70%. High-speed steel tools are shrinking at a rate of 1% to 2% per year, and the current proportion has fallen below 30%. Superhard tools such as diamond and cubic boron nitride have a specific gravity of about 3%.
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