hole drilling (HD)
Decomposition Theory of the Hole Drilling Method for the Stress State Identification
... semi-destructive hole drilling principle for the stress state identification is based on the assumption, that the free surface is one of the principal planes and the stress state in the surface layer thus ...
12
An Enhanced Calibration Scheme for the EDM Hole Drilling Strain Gage Method for the Measurement of Residual Stress in Ferrous Materials
... the hole-drilling strain gage method, a strain gage rosette is attached to the specimen surface, and a circular hole is drilled vertically into the specimen at the center of the gage circle in order ...
6
Parameter Affecting Blast Hole Drilling in Coal Mines
... Blast hole drilling is an essential part of production process in mining as well as civil ...of drilling holes in the ground existed in prehistoric times, in those days mining activities certainly ...
5
Evaluation and improvement of economic efficiency in the sphere of bore hole drilling methods
... bore-hole drilling for various purposes is increasing in today’s ...Since drilling is the main type of exploration, it is necessary to improve the technology and to reduce ...bore-hole ...
5
The influence of EDM parameters when micro hole drilling of tungsten carbide
... As a conclusion, the Design of Experiment (DOE) approach enabled the identification of significant factors and prediction of the variables at their best level. Based on the analysed results, it was observed that the most ...
9
Micro hole drilling by industrial CO2 laser
... cutting, drilling, welding as well as ablation and material surface texturing, whereby it is possible to get a very fine surface structure ranging in the micrometer domain ...
24
Aspects of the determination of residual stresses in ceramics by ultrasounds hole-drilling
... the drilling method is established according to ASTM E-837- ...a hole at the section of the axes of the three marks forming the ...the drilling device versus the hole made in the ...
6
Bottom Hole Assembly and Mud Motor for Directional Drilling
... The successful drilling of a wellbore completely depends on the success of BHA. The BHA is to provide force the drill bit and to control the direction of the well. The BHA is the component of the drill string that ...
6
Exploring the Impact of Work Life Balance on the Employee and Organisational Growth
... industries. Drilling takes acre about 35% of all the machining ...the drilling process is followed at the end of all other machining processes, the acceptability of the products depends on the quality of ...
8
Estimation of the Residual Stresses Impact on the J Parameter Calculation in Welded Joint
... Also, residual stress was measured using two different methods. The first method involved neuron diffraction in the Orphée research reactor. The second was the deep hole drilling method, conducted by the ...
10
Study Paper on Methods of Measurement of Residual Stress in Mechanical Components
... depth profiles in technical components. Its application is limited in respect to the components geometry, for instance the components thickness. In this paper, a direct correction of the measured strain relaxations is ...
7
Application of BPNN-GA To Optimize Drilling Process of Stainless Steel-GFRP Stacks
... is hole drilling. In drilling dissimilar materials which involve different material properties, it is necessary to choose appropriate drilling parameters that nearly accords with ...
10
Effect Of Drilling Parameters On Quality Of The Hole
... the hole drilling process affect the hole ...different drilling process, he found that the residual stress induced by the drilling process and the hole conicality affect ...
8
Development of Double-arm Rock Drilling Car for Full Face Tunnelling
... large hole central hole cutting, using the newly developed 120 mm large hole down-the-hole drilling machine, the blasting free surface of two 120 mm intermediate holes is directly ...
6
Research on Drilling Process of Deep Hole Trepanning for Titanium Alloy(TC4)
... deep hole drilling machine diameter, the rod was corrected by magnetic indicator, which set drill can smoothly enter our prior processing end slot in ...
6
Application of Fuzzy logic in Micro- Drilling Machining Process
... the drilling of holes less than 0.5 mm (0.020 in). Drilling of holes at this small diameter presents greater problems since coolant fed drills cannot be used and high spindle speeds are ...Micro ...
10
Mechanical strength assessment of a drilled hole in the contralateral cortex at the end of the open wedge for high tibial osteotomy
... bored hole in the anterior-posterior (AP) direction; which allowed a sig- nificant increase of the correction angle compared with the same osteotomy without a drill hole (Kessler et ...drill hole in ...
19
Drilling Wastes Generation and Management Approach
... 1990s, drilling fluid companies devised new types of fluid that used non-aqueous fluids as their ...desirable drilling fluid properties of Oil-based muds (OBMs) but are free of poly-nuclear aromatic ...
6
OPTIMIZATION OF OVALITY ON DRILLING GLASS FIBER REINFORCED PLASTIC COMPOSITES WITH COATED TUNGSTEN CARBIDE TOOL
... attaining hole quality considering thrust force, torque and damage/delamination around the drilled hole in laminated ...the drilling of nonlaminated composite materials is ...of drilling ...
9
Experimental Investigation of Machining Time and Surface Roughness of AA6082 by Using Different Drill Bits with Various Cutting Environments
... The drilling tests are carried out on Vertical Milling Machine names as ESTEAM under dry condition. The aluminium alloy of AA 6082 was mounting on the particular machine area; size of aluminium alloy 250 X 260 X ...
8