Hardware cutters do not require structural adjustment

Hardware cutters do not require structural adjustment The number of high-speed, high-efficiency CNC machine tools and machining centers in the domestic manufacturing industry is rapidly increasing, and a large number of highly efficient cutting tools are already required. Modern efficient cutting tools will gradually become the mainstream of the market. There are already some advanced machinery manufacturers requesting the tool factory to supply certain efficient cutting tools and efficient special tools. However, due to the lack of thought preparation and technical preparation of the tool factory, the supply (or only a small supply of machinery) could not be satisfied. As a result of the requirements of the manufacturer, these factories use imported tools and products of foreign tool companies in large quantities, and this situation needs to be changed, and only in this way can the market of uncontrolled tools be well controlled. The number of high-efficiency numerically-controlled machine tools and machining centers is rapidly increasing, and a large number of highly efficient and advanced tools are already needed, and modern high-efficiency cutting tools will gradually become the mainstream of the market, and some advanced machinery manufacturers have proposed to the tool factory to supply some highly efficient advanced tools. And high-efficiency special tool requirements, but due to the lack of ideological preparation and technical preparation of the tool factory, they failed to meet the supply (or only a small part of the supply of the requirements of the machinery manufacturer). Therefore, these plants used a large number of imported tools and products of foreign tool companies. , and this situation needs to be changed, and only then can we make the knife Runaway market is well controlled.

“The current trend in machine tool development is high speed, high precision and high quality.” Luo Baihui, a mold specialist, pointed out that high-speed operations require higher surface treatment requirements for molds, cutting tools, and mechanical parts, extending the useful life and reducing production costs. Creating higher profits is the common goal pursued by the industry.

In order to cope with high-speed machining and save a lot of processing time and costs, tool improvement has become an important factor. Tungsten carbide tools have a growing share in the tool market because of their higher wear resistance and hardness. In order to obtain the best benefits in processing, proper surface treatment must be selected. Medium and heavy load molds must be CVD high-temperature titanium plating, supplemented by precision vacuum heat treatment to achieve acceptable deformation. This part is commonly used in cold forging die, hydraulic drawing die, tungsten carbide drawing line, suction pipe. In the application of tools, molds, and mechanical parts with medium or low load or precise requirements, PVD titanium plating at low temperature (150°C to 500°C) is appropriate.

Aluminium titanium nitride with high aluminum content can easily generate aluminum oxide on the surface of the hard film. This layer of oxide film can make titanium aluminum nitride ceramic hard film oxidation temperature reached 923 degrees Celsius, can protect tungsten carbide cutting tool high-speed cutting edge oxidation resistance and maintain high temperature hardness. However, although titanium nitride and titanium carbonitride also form titania oxide films at high temperatures, they are not easily adhered to the hard films and flaking off with chips, which results in a lack of protection of the hard films, rapid oxidation, and deterioration. Therefore, no matter whether the surface treatment of high-temperature or low-temperature coating has to be properly selected, a proper substrate and stable heat treatment must be used, and the pre-treatment of fine-grinding and polishing of the surface must be followed in order to improve.

Ultra-high temperature resin bond diamond grinding wheel processing efficiency is lower than METROX grinding wheel, due to the high bonding strength of the grinding wheel, the production cycle is short, the processing cost is low, especially when grinding tool edge is not easy to cause chipping, and according to the use requirements, Grinding into a variety of shape and shape of the molding wheel, so it is still widely used in production for a long time. How to further improve the grinding performance of such grinding wheels has also become an important task at present.

With the rapid development of tool design, manufacturing and use technologies, and the ever-increasing output of cutting tools, ultra-high temperature resin-bonded diamond grinding wheels still cannot fully meet the requirements for high-volume production of cutting tools. There is still room for further development in the number and quality of tools. . For this purpose, Shanghai Zhongyu Company is further studying how to improve the grinding performance of this type of grinding wheel. In particular, a large number of experimental studies have been conducted on the wear resistance of the bonding agent, the bonding strength of the bonding agent and the diamond abrasive, and self-sharpening properties. Great progress. The test results show that the improved grinding wheel grinding efficiency can be increased by about 20% on the original basis, and the grinding wheel life can be increased by about 50%.

At present, the imbalance of tool structure is not the right way to produce tools and demand. For example, users need carbide cutting tools to have large gaps, but high-speed steel tools are over-manufactured; modern manufacturing is in urgent need of efficient tools. The gap is large, but low-grade standard tools are over-produced. In developed countries, cemented carbide tools currently occupy the dominant position of tools, with a proportion of 70%. High-speed steel cutting tools are being reduced by 1% to 2% per year, and the current proportion has fallen below 30%. The proportion of super hard tools such as diamond and cubic boron nitride is about 3%.

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