Search for dissertations about: "diamond turning"

Found 4 swedish dissertations containing the words diamond turning.

  2. 1. Optics for Earth Observation Instruments

    Author : Arvid Hammar; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; off-axis; free-form mirrors; measurements; stray light; spline horns; THz; reflector optics; satellites; scientific instruments; diamond turning; tolerancing; telescopes;

    Abstract : The optical system is an essential part of every remote sensing instrument used for detecting electromagnetic waves. Careful design, fabrication and characterization is therefore crucial, especially for satellite-borne missions where the possibility of post-launch repairs is highly limited. READ MORE

  4. 2. Microstructure of a cubic boron nitride tool material before and after hard turning

    Author : Jenny Angseryd; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EELS; cBN; microstructure; PCBN; adherent layer; EDX; wear; SEM; EFTEM; TEM;

    Abstract : AbstractPolycrystalline cubic boron nitride (PCBN) materials are widely used in turning of hardened steels due to their beneficial mechanical properties like high hardness at elevated temperatures and, compared to diamond, for being more chemically stable towards iron at temperatures typical for turning operations (800-1000˚C). The wear of PCBN tools is influenced by several factors, like machining parameters, different tool geometries and varying composition of PCBN tools as well as workpiece material. READ MORE

  5. 3. Microstructure of a cubic boron nitride tool material and its degradation during hard turning operations

    Author : Jenny Angseryd; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EDX; adherent layer; cBN; PCBN; SEM; TEM; EELS and APT; wear; EFTEM;

    Abstract : Abstract. Polycrystalline cubic boron nitride (PCBN) materials are widely used in turning operations of hardened steels due to their beneficial mechanical properties like maintained high hardness at elevated temperatures, adequate toughness and for being more chemically stable towards iron compared to diamond at temperatures typical for turning operations. READ MORE

  6. 4. Machining of Some Difficult-to-Cut Materials with Rotary Cutting Tools

    Author : Tero Stjernstoft; KTH; []
    Keywords : Difficult-to-Cut material; Metal Matrix Composite MMC ; Machining; Machinability; Rotary Cutting Tool; Acoustic Emission;

    Abstract : Automobile and aero industries have an increasing interestin materials with improved mechanical properties. However, manyof these new materials are classified as difficult-to-cut withconventional tools. It is obvious that tools, cutting processesand cutting models has to be devel-oped parallel to materialsscience. READ MORE