Cylinder bore surface testing

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NanoFocus Inc.'s μsurf cylinder tool, which will be displayed at the SAE 2014 World Congress April 8-10 in Detroit, provides a nondestructive technique for high-resolution 3-D measurements of the inside of cylinder bores and liners. The technology excels in its measurement speed, robustness, and flexibility for use on various types of surfaces. Quantification of the surface is provided via ISO and ASME standardized parameters (ISO 25178 and ASME B46.1) as well as customized analyses to fit the manufacturer's needs. The tool can also be automated to bring micrometer and nanometer resolution to shop-floor process control. Equipped with a linewalking mobile rail that can be placed onto the crankcase, the measuring head can move to defined measuring positions without manual placement. The technology can be used for traditionally honed surfaces, thermal spray coated surfaces such as PTWA, or machined and etched surfaces such as Alu-Sil, as well as almost any other surface material. Quantities that can be measured and quantified include surface roughness, bearing area, material wear, lubricant entrapment volume, fold and tear, and hone angle. An essential characteristic and advantage of the μsurf technology is its comparability to tactile data. (Booth 734)

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