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M. Khoran [18] utilized cryogenic cooling to improve the surface quality and to reduce the tool loading when grinding PEEK. In addition to the turning and drilling of PEEK and related materials, many works focused on the milling of PEEK, because the milling operation can achieve complex 3D ...
Therefore, to avoid frequency shifts, the length/thickness ratio of the resonator should be altered by grinding or the surface roughness should be improved by polishing. Figure 9. Distributions of u1 along the x1 direction at x2 = 0.5 hq: (a) lq/hq = 40; (b) lq/hq = 40.7. 4. ...
Despite the fact that the grinding introduces relatively large axial compressive residual stresses in the surface layer, the depth of the compression zone is significantly smaller than that for DB (Figure 9). Figure 9. Residual stress distribution introduced by optimized DB (r = 2 mm) and ...
3D surface roughness;hard turning;grinding 1. Introduction Surface roughness of machined surfaces has a high impact on the working characteristics [1,2] and wear and therefore on the lifetime of the components built into automotive industrial products. In cutting, the final surface topography depends...
and the main mechanical properties are shown inTable 2. The tool material was high-speed steel, and the tool clearance angleaowas 10°, as shown inFigure 1b. The tool rake angle and clearance angle were obtained by grinding with an MQ6025A universal tool grinder, which can reduce the error...
In practice, the surface error of a given part is the combination of various manufacturing processes such as generating, grinding, optical mounting for fabrication, post processing, etc. Additionally, the surface error scale can be a strong function of optical system’s wavelength (e.g., Extreme...
Using a diamond wheel (SDC140, Asahi Diamond Industrial Co., Ltd., Tokyo, Japan) and a surface grinding machine, the pure titanium test piece was machined into a rectangular test piece of about 15.0 mm × 10.0 mm × 6 mm, and the surface of about 15.0 mm × 10.0 mm was used as th...
With the continuous improvement in the pressure ratio of centrifugal compressors, improving their service life is particularly important. According to the statistics, the fatigue failure of most parts occurs on the surface [5,6,7]. Therefore, without changing the existing materials, how to improve ...
refining and enzymatic pretreatment followed by six passes through a high shear homogenizer. Two grades were produced by tempo oxidation followed by six passes through the high shear homogenizer or ultra-fine grinding in a grinder based on the rotor/stator concept. The amount of MFC ranged from ...