Search for dissertations about: "Boring"

Showing result 1 - 5 of 30 swedish dissertations containing the word Boring.

  1. 1. Raise boring optimization : analysis of reliability and drilling performance on raise boring in the Kiirunavaara Mine

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Jenny Svanberg; Luleå tekniska universitet.; [2001]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gruv- och Berganläggningsteknik; Mining and Rock Engineering;

    Abstract : For the new main level in the Kiirunavaara mine, new ventilation shafts and ore passes had to be made. The method chosen for the excavation was raise boring. This thesis describes an analysis of the raise boring performed, and gives suggestions on how to optimize the raise boring. READ MORE

  2. 2. Machinability Testing of Materials in Metal Cutting with Focus on Compacted Graphite Iron and Cutting Fluids

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Varun Nayyar; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; UTS.; Boring; Drilling; Cutting Fluid; Turning; Milling; Force; Wear; Force; Torque; Compressed air; CGI; Hardness; Tool Life; Material Properties; Chip Microstructure; Tapping;

    Abstract : Due to the stringent demands for lower emission from trucks require better mechanical properties of the material to be used in the engines. Better efficiency necessitates higher peak pressure in the engines and for traditionally used material, Flake Graphite Iron (FGI), the mechanical properties starts to reach the limit of what the material can withstand. READ MORE

  3. 3. Cutter loads on full-face rock boring machines : a random noise model

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Gunnar Kylberg; KTH.; [1999]
    Keywords : ;

    Abstract : .... READ MORE

  4. 4. Improving Machining System Performance through designed-in Damping Modelling, Analysis and Design Solutions

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Lorenzo Daghini; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining performance; Cutting stability; Passive damping; High Damping Interface; Boring bar; Turret; SRA - Production; SRA - Produktion;

    Abstract : With advances in material technology, allowing, for instance, engines to withstand higher combustion pressure and consequently improving performance, comes challenges to productivity. These materials are, in fact, more difficult to machine with regards to tool wear and especially machine tool stability. READ MORE

  5. 5. Laboratory studies of dynamic rock fracture and in-situ measurements of cutter forces for a boring machine

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Zongxian Zhang; [2001]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gruv- och Berganläggningsteknik; Mining and Rock Engineering;

    Abstract : All forms of rock failure usually happen within a very wide range of loading rates covering static and dynamic loading. Since rock failure always results from fracture - the propagation of one or more cracks- the first part of the thesis is focused on laboratory studies of the influences of loading rates on rock fracture. READ MORE