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The company has domestic experienced tool research and development personnel and advanced processing technology. With advanced equipment and imported auxiliary materials such as high-quality composite sheets, the company has developed domestic leading high-precision tools, which have been widely used in automobile manufacturing, aerospace, precision. High-precision machining in industries such as electronics, transmissions, drive shafts, communications equipment, and non-ferrous metals.
At Kailing, the design and manufacture of various standard tools and non-standard tools are the ultimate goal of meeting the demanding cutting requirements of “high speed, high precision and high feed rateâ€. Its innovative PCD, PCBN super-hard cutting tool as a fist product has good equipment suitability, long service life, high cutting precision, economical and environmental protection, etc. It is not only suitable for traditional metal cutting, but also for stone and engineering. The tool of choice for the processing of specialty materials such as ceramics, photovoltaic glass and composites.
This year's EMTE-EASTPO 2014, Shanghai Qiling Precision Tools exhibited new concepts and applications of ultra-hard precision cutting:
Diamond (PCD) tool series
Features:
1PCD hardness can reach 8000HV, which is 80-120 times of cemented carbide;
The thermal conductivity of 2PCD is 700W/mK, which is 1.5-9 times that of cemented carbide, even higher than PCBN and copper, so the heat transfer of PCD cutter is rapid;
The coefficient of friction of 3PCD is generally only 0.1-0.3 (the friction coefficient of cemented carbide is 0.4-1), so PCD tools can significantly reduce the cutting force;
The thermal expansion coefficient of 4PCD is only 0.9×10^-6——1.18×10^-6, which is only equivalent to 1/5 of the cemented carbide. Therefore, the PCD cutter has small thermal deformation and high processing precision.
The affinity between the 5PCD tool and the non-ferrous and non-metallic materials is very small, and the chips are not easily bonded to the tip of the blade during processing to form a built-up edge.
application:
Processing ranges from traditional metal cutting to processing of materials such as stone, wood, metal-based composites, glass, and engineering ceramics.
Through the analysis of PCD tool applications in recent years, PCD tools are mainly used in the following two aspects:
1 Difficult to process non-ferrous metal materials: When machining difficult-to-process non-ferrous metal materials with ordinary tools, defects such as easy tool wear and low processing efficiency are often produced, while PCD tools can exhibit good processing performance. For example, the PCD tool can effectively process the new engine piston material - hypereutectic silicon aluminum alloy (the research on the processing mechanism of this material has made a breakthrough).
2 Processing of difficult-to-machine non-metallic materials: PCD cutters are ideal for processing difficult-to-machine non-metallic materials such as stone, hard carbon, carbon fiber reinforced plastic (CFRP), and artificial boards. Processing these materials with PCD tools can effectively avoid defects such as easy tool wear.
Cubic Boron Nitride (PCBN) Tool Series
Features:
1 has high hardness and wear resistance: the microhardness is HV8000-9000, which is the second highest hardness material known at present. The hardness of PCBN composite sheet is generally HV3000-5000.
2 has high thermal stability and high temperature hardness: heat resistance can reach 1400-1500 °C, therefore, when the cutting temperature is higher, the material to be processed will be softened, and the hardness difference between the tool and the tool will increase, which is beneficial to cutting. Processing takes place and has little effect on tool life.
3 has high chemical stability: CBN has high oxidation resistance, and does not produce oxidation at 1000 °C. It does not react with iron-based materials at 1200-1300 °C, but at 1000 °C. It will hydrolyze with water and is therefore suitable for dry cutting.
4 has good thermal conductivity: As the cutting temperature increases, the thermal conductivity of the PCBN tool increases continuously, so that the heat at the tip of the tool can be quickly transmitted, which is beneficial to the improvement of the machining accuracy of the workpiece.
5 has a lower coefficient of friction: the friction coefficient with different materials is between 0.1 and 0.3, which is much lower than the friction coefficient of cemented carbide (0.4-0.6), and it is slightly increased with the increase of friction speed and positive pressure. There is a decrease. Therefore, the low friction coefficient and excellent anti-adhesive ability make it difficult for CBN tools to form a retention layer or built-up edge when cutting, which is beneficial to the improvement of the surface quality.
application:
â—†Applicable to high-speed and ultra-high-speed cutting technology â—†The best tool material for hard cutting technology â—†The ideal tool material for dry cutting process â—†The cutting process of high hardness material and difficult material, such as hardened steel and high alloy Cutting of difficult-to-machine materials such as wear-resistant cast iron, high-temperature alloy, high-speed steel, surface spray-welded materials, and sintered metal materials.
1 The hardened steel is processed to achieve the effect of grinding by car. Since the cutting depth is more than ten times larger than the grinding depth, the machining efficiency is high and the surface does not burn. If the variable speed sliding gear (20CrMnTi, hardness HRC58-62) is machined by car, the cutting efficiency is more than 4 times higher than that of the original grinding.
2 Processing high-alloy (18% tungsten or chromium) wear-resistant cast iron, the cutting speed is more than 10 times higher than that of hard alloy cutting tools, and the cutting efficiency is increased by more than 4 times.
3 processing high cobalt chromium molybdenum corrosion resistant alloy, PCBN cutting speed of 160m / min, is 8 times that of cemented carbide tools.
4 processing thermal spray (spray welding) materials, surface spray weldments can not be used for grinding, and the cutting efficiency with carbide tools is extremely low, the use of PCBN tools can improve processing efficiency and save processing costs by more than 50%.
Abstract Established in 2007, Shanghai Qiling Precision Tools Co., Ltd. is a modern scientific management tool manufacturer integrating R&D, design, production and sales. Production of various standards as well as non-standard polycrystalline diamond (PCD), polycrystalline cubic boron nitride (PCBN) and other machine tools...
Established in 2007, Shanghai Qiling Precision Tools Co., Ltd. is a modern scientific management tool manufacturer integrating R&D, design, production and sales. Production of various standards and ultra-hard precision cutting tools for machine tools such as non-standard polycrystalline diamond (PCD) and polycrystalline cubic boron nitride (PCBN).