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Briefly describe the characteristics of milling and the classification of cutting tools
Milling features: milling cutter is a multi-edge tool, the number of teeth work more, you can use step milling, you can also use high-speed milling because of this higher productivity. Milling process is a continuous cutting process, cutting edge into and out of the workpiece moment, to produce shock and vibration, when the vibration frequency and machine tool natural frequency is consistent, vibration will intensify, resulting in chipping, and even damage to machine parts.
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What are the factors that affect the service life of the forming tool
Line speed has a great influence on tool life. If the line speed is higher than 20% of the specified line speed of the sample, the tool life will be reduced to 1/2 of the original; If it is increased to 50%, the tool life will be only 1/5 of the original. To improve the service life of the tool, it is necessary to know the material and state of each workpiece to be processed and the linear speed range of the selected tool. The line speed of the tool is not the same, in the processing according to the specific situation to adjust, you can achieve a more ideal effect. The data of line speed in rough machining and finish machining are not consistent. Rough machining is mainly to the allowance, and the line speed is low. Finishing is mainly to ensure dimensional accuracy and roughness, and the line speed is high.
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Enhancing product competitiveness is the key to competition in the cutting tool industry
The domestic tool industry in the world among the mold industry in the low end, the emergence of such a situation and the industry as a whole low level of science and technology, the price war continued. If the tool industry wants to develop, it must continue to increase research and development funds, increase the content of science and technology, and produce products with core competitiveness. Only by increasing product research and development can we truly change the current competitive model.
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Machining tool high requirements at the same time to reduce pollution
About 70% of the premature failure of various mechanical and electrical products is caused by wear and corrosion, and these two failure modes are closely related to the surface state of the material (physical, chemical and stress state, etc.). Therefore, the key to improve the performance of such materials is to improve their surface properties.
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Present Situation and Analysis of Cemented Carbide Tools in China
In 2012, China's cemented carbide output was 23500 tons, the sales revenue of the cemented carbide industry was 20.9 billion billion yuan, the cemented carbide export was nearly 5000 tons, the export earned more than 0.36 billion US dollars, and the output of cemented carbide deep-processed products reached 6600 tons, accounting for 1/3 of the total alloy output.
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Cemented carbide is a kind of alloy material made by hard compound of refractory metal and bonding metal through powder metallurgy process. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which remains basically unchanged even at a temperature of 500 ℃, and still has a high hardness at 1000 ℃.
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