Wheel must be used with safety guards. The actual rotational axis of the wheel and its axis of rotation through the center of mass deviation from parallel state called static unbalance wheel. This is usually due wheel uneven density, both ends of the hole and the surface is not parallel or coaxial cylindrical deviation has caused.
2013年7月30日星期二
PCD and PCD / CC material
PCD and PCD / CC is the most commonly used in the production of diamond material, it applies not only usually machining fields, but also widely used in automobiles,
motorcycles, high-speed trains, petroleum, chemical, construction, wood processing, and aerospace and other industrial sectors. In the automotive and motorcycle
Car field, PCD and PCD / CC suitable for machining aluminum engine piston skirt, pin hole, cylinder blocks, transmission, carburetor and other wear parts. Most of
these components are relatively high silicon content (Si> 12%) of aluminum composite material of high hardness of the hard
Mass particles (such as high hardness of SiC-3000 ~ 3500HV) distributed in the alloy matrix, and if the abrasive wheel as the cutting edge of the tool be abrasion and
impact action from, leaving the cutting edge wear quickly. The higher the hardness of hard particles, the larger the size of particles,
The greater the number of particles, then the tool wear faster. Therefore, it is difficult using conventional machining of carbide cutting tools, tool life is very low
or impossible to use. Diamond blade is the world's hardest substance known, the actual use of proven, it is the processing of aluminum matrix composites
Best tool material.
With polycrystalline diamond machining aluminum matrix composites, its cutting speed of up to 800 ~ 1000m/min, tool life is several times higher than the carbide or even several
times the surface roughness value of up to Ra 0.025 ~ 0.012μm. Figure 2 shows the drilling process with PCD tools
20% SiCυ of aluminum matrix composite spiral pump casing application examples.
With PCD (or PCD / CC) tooling carbon fiber and glass fiber reinforced plastic (FRP), the chip into a powder, cutting temperature is low, and the length of class K
carbide cutting tool 10 times, and not to hard wear carbide tool 1/3.
PCD (or PCD / CC) also applies to the processing tool after a burn-resistant carbide and non-metallic materials, such as ceramic, rubber, graphite, glass and various
wear-resistant timber.
PCD tool performance depends primarily on its application and the process involved, but the choice of the appropriate grade and particle size can also affect it.
Different varieties of PCD inserts, due to its composition of different cutting is very different, the election
Use should be noted.
Currently PCD inserts Carbide did not have a unified international classification, each has its own production plant varieties and grades, to be used to select the
reference sample manufacturers.
订阅:
博文评论 (Atom)
没有评论:
发表评论