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  • 2005-2009  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Error Analysis and Robust Position Measurementfor Vertex of a Small Polyhedron (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 389-390 (Sept. 2008), p. 83-89 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A robust measurement method for vertex position of a small polyhedron using 3D imageprocession is proposed. Shape from focus method is applied for getting 3D positions on surfaces ofthe polyhedron. Averaging of in-focus function is usually applied for reducing noises, but it lackssharp edge information of the target. The position of the vertex is indirectory calculated from the 3Ddata using geometrical model of the polyhedron. In this paper, relations between measurement noiseand appropriate number of data for averaging of focal measurement, and area of data for fitting of theGaussian function were investigated. Then, error propagation analysis is applied to the equations ofthe indirect measurement of the vertex position. By using the geometrical characteristics of thepolyhedron, measurement of the vertex position became robust against the measurement errors.Effectiveness of the proposed method was confirmed by numerical simulation and experimentalresult for measurement of a vertex of a small polyhedron
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.389-390.83.pdf
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    High Speed Cutting of Titanium Alloywith PCD Tools (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 389-390 (Sept. 2008), p. 157-162 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: When cutting titanium alloy, the temperature of a cutting tool edge is easy to rise and thetool edge is tend to be worn away quickly because the titanium alloy has the characteristics of lowthermal conductivity and high chemical activity. Therefore, it is difficult to achieve a balance betweenthe productivity and the tool life in cutting the titanium alloy, namely, low-speed cutting must becarried out at present. To examine the possibility of the improvement in the cutting efficiency, a PCD(polycrystalline diamond) tool having high thermal conductivity was adopted to the cutting oftitanium alloy and its cutting performance was investigated. The PCD tool was found to haveexcellent flank wear resistance compared with conventional cemented carbide tools. It was alsorevealed that unprecedented high speed cutting become possible by use of PCD tool with anapplication of high pressure coolant
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.389-390.157.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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