The hottest iska advanced composite machining solu

2022-08-08
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Iska advanced composite machining solutions

with the development of the new generation of carbon fiber reinforced plastics (CFRP) and laminates to be lighter and stronger, and their performance has been continuously improved, its position in various fields such as snowboard, racket, military aircraft and automobile has become increasingly prominent. As a workpiece material, its long-standing main challenge is how to improve the manufacturing process, especially machining. Although it is used in fuselage or ship frame with excellent performance, all kinds of fiber-reinforced epoxy resin, polyester and vinyl plastics have high hardness, are difficult to cut, and can not tolerate a little abnormal deviation in the processing process. Moreover, the added value of pre-processing is high, and the generation of waste products is not allowed

fortunately, a new generation of special tools have emerged one after another, solving the most common processing needs of various composite materials. For example, iska polycrystalline diamond (PCD line) series drills and milling cutters have a wide machining coverage. They are composite materials that have been verified by practice and adopt specific fiber orientation technology tools. There are both drills suitable for processing thicker materials with aluminum alloy as the bottom layer and drills suitable for processing thinner materials with carbon fiber reinforced plastic as the bottom layer. It also provides a series of combined cutters, such as countersunk screw hole combined drill, drilling reamer, slot milling cutter and combined drilling and milling cutter. Other products are numerous. It can be said that for the first time since the advent of reinforced composites, you can always find a high-performance tool to deal with any imaginable composite processing task

at present, the preferred tool solution for cutting composite materials is to use solid cemented carbide as matrix, thin PVD diamond (PCD) coating, braze PCD blade or sinter PCD at the cutting edge. In thousands of practical applications for various advanced composite materials, iska's above-mentioned tools are superior to most other similar products (including CVD diamond coated carbide tools). The harder the material, the higher the density of the reinforcing fiber, and the greater the room for process improvement

the reason is obvious. Only from the perspective of "Wang Xianhong added, the overall cemented carbide tool has the rigidity and dimensional accuracy necessary to ensure the dimensional precision tolerance, positional tolerance and surface finish of the workpiece. The integral cemented carbide also makes it possible to optimize the cutting geometry, which can reduce the cutting force, cutting heat, uncut fiber, cupping, wiredrawing, fuzzing and other problems, and better control the chip

thin PVD diamond (PCD) coating (applied to solid carbide tools or PCD blades) makes the cutting edge more wear-resistant, thus ensuring that the tool maintains its original geometric structure in a long machining cycle. The secret lies in the realization of PVD diamond (PCD) thin coating. They not only provide the wear resistance of diamond, but also help to maintain the ideal cutting geometry of cemented carbide tools. In contrast, CVD (chemical vapor deposition) coating inevitably forms a thicker diamond coating, which is not conducive to the optimization of geometric structure

mainstream composite cutting tools

as mentioned above, diamond reinforced drill bits with integral cemented carbide matrix have been proved to be very successful. Because they can maintain a longer sharp state than ordinary solid carbide tools when machining composite materials

the capacity of the electronic UTM experimental machine often used by Jinan experimental machine factory is 100 ~ 135000 lb. at present, there are four kinds of diamond reinforced tools on the market suitable for processing composite materials:

(1) CVD diamond coated cemented carbide has the advantages of high wear resistance of diamond and dimensional accuracy of cemented carbide tools. The disadvantage is that the coating is thick, which may reduce the sharpness of the cutting edge and even make the cutting edge deviate from the correct geometry

(2). PVD diamond coated cemented carbide has the advantages of high wear resistance of diamond and dimensional accuracy of cemented carbide tools. The cutting edge is sharper and the control of the cutting edge geometry is better

(3). Brazed diamond blades on solid cemented carbide substrates - applicable to the case where only the front edge of the tool has diamond wear resistance requirements

(4). High pressure integrally sintered diamond (PCD) integrally cemented carbide bit - it is characterized by: 4. When loading, the sintered diamond (PCD) is in the edge groove of the integrally cemented carbide tool

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