Search for dissertations about: "mechanical drilling thesis"

Showing result 1 - 5 of 50 swedish dissertations containing the words mechanical drilling thesis.

2. 1. Expert system for hole engineering with special reference to position accuracy when drilling

   Author : Jacek K Kaminski; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; expert system; machining costs; feed; cutting speed; drilling data; position accuracy; twisted drill; drilling; hole machining sequances;

   Abstract : .... READ MORE

4. 2. Positional Accuracy of Drilled Holes

   Author : Jacek K Kaminski; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; corresponding cutting forces; chip areas; workpiece material; drill wandering; rigidity; drill length; hole-making; surface slope; hole positional accuracy; drilling; conventional point geometry; high-speed steel twist drills; cutting resistance;

   Abstract : When selecting hole-making sequences, the positional accuracy mainly is determined during the first drilling operation. This dissertation consists of three papers which consider the influence of various factors on hole positional accuracy when drilling in inclined workpieces using high-speed steel twist drills with conventional point geometry. READ MORE

5. 3. Thermo-mechanical modelling of welding with experimental verification

   Author : Mats Näsström; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

   Abstract : Residual stresses and deformations after welding were studied numerically and experimentally. The numerical simulations were performed using the finite element method. In the calculations a thermoelastoplastic material model was used. READ MORE

6. 4. Towards Discrete Element Modelling of Rock Drilling

   Author : Albin Wessling; Simon Larsson; Pär Jonsén; Jörgen Kajberg; Bengt Wikman; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DEM Rock Dynamic Drilling; Hållfasthetslära; Solid Mechanics;

   Abstract : The method of percussive rotary drilling is recognized as the most efficient method for hard rock drilling. Despite the clear advantages over conventional rotary meth-ods, there are still uncertainties associated with percussive rotary drilling. READ MORE

7. 5. The Hand in Manual Work - Physiological and Psychophysical studies

   Author : Lena Johansson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hand; pressure; muscle activity; laser doppler flowmeter; perception; manual work; hand tool; drilling machine; cutaneous blood flow; wrist orthosis;

   Abstract : This thesis focuses on the hand in manual work. In particular, we have studied what happens to skin and muscles when gripping a hand tool. Different aspects of gripping that will be discussed are: pressure on the hand, effects on the skin blood flow, muscle activity and the use of wrist orthoses. READ MORE