Essays about: "top hammer drilling"

Found 4 essays containing the words top hammer drilling.

1. 1. Binder Migration in Double Pressed Drill Bit Inserts

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Author : Axel Bjerke; [2018]
   Keywords : Physics and Astronomy;

   Abstract : It is possible to produce functionally graded cemented carbides on a large scale by double pressing. Being able to predict the binder migration in WC-Co cemented carbides during the sintering is essential to the design of such cemented carbides. The cobalt content is one of the main factors determining the hardness gradient. READ MORE

3. 2. Tribological testing of top hammer drill buttons

   University essay from Uppsala universitet/Tillämpad materialvetenskap

   Author : Carl Johan Hassila Karlsson; [2016]
   Keywords : tribology; wear; cemented carbides; WC-Co; sandstone; granite; rock drilling; top hammer drilling; wear test; friction;

   Abstract : In the present work further modifications are implemented to an existing test setup for the evaluation of the wear of cemented carbide drill buttons in rock drilling applications. The test setup has been evaluated in previous diploma works, which has shown that the test successfully mimics the wear seen in rock drilling applications. READ MORE

4. 3. Decision analysis : determining the most appropriate drilling method for production drilling in underground mining

   University essay from Högskolan i Gävle/Avdelningen för Industriell utveckling, IT och Samhällsbyggnad

   Author : Fredrik Gransell; [2016]
   Keywords : ;

   Abstract : The mining industry contains many factors with a high degree of uncertainty. Therefore, there is a need for decision analysis. The production drill process is an initial process in underground mining, thus it is important that the most appropriate drilling method is used for specific mining operations. READ MORE

5. 4. Heat Resistant Steel Alloys : Atlas Copco

   University essay from Uppsala universitet/Institutionen för teknikvetenskaper

   Author : Malin From; Johanna Ejerhed; Artin Fattah; Markus Lindén; Alex Karlstens; [2015]
   Keywords : steel alloy heat resistant nitration;

   Abstract : Atlas Copco is interested in investigating the friction in the top-hammer drilling tool threads thatcauses the steel to heat up, leading to a phase transformation and a softer steel in the threads. Theaim of this project is to find a steel alloy or surface finishing that will retain its hardness atelevated temperatures better than the presently used threads material. READ MORE