Sökning: "Boring"
Visar resultat 1 - 5 av 43 avhandlingar innehållade ordet Boring.
1. Raise boring optimization : analysis of reliability and drilling performance on raise boring in the Kiirunavaara Mine
Sammanfattning : 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. LÄS MER
2. Machinability Testing of Materials in Metal Cutting with Focus on Compacted Graphite Iron and Cutting Fluids
Sammanfattning : 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. LÄS MER
3. Cutter loads on full-face rock boring machines : a random noise model
Sammanfattning : .... LÄS MER
4. Improving Machining System Performance through designed-in Damping : Modelling, Analysis and Design Solutions
Sammanfattning : 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. LÄS MER
5. Establishment and spread of non-native bark- and wood-boring beetles
Sammanfattning : One of the biggest threats to forest ecosystems globally is the introduction and establishment of non-native species. In Sweden alone, several bark- and woodboring beetles have established populations in recent years. LÄS MER