Tag Archives: Drilling

Minimization Comparison of Surface Roughness Drilling Value of Mild Steel, Stainless Steel and Brass: An Application of One-Way Anova Technique (Published)

The study investigated on minimization comparison of surface roughness drilling value of mild steel, stainless steel and brass using one-way analysis of variance (ANOVA) technique so as to check for significant difference between the workpiece in their value of surface roughness using the same process parameters irrespective of their material properties. The experimental data used in the comparison were conducted nine (9) times for each of the workpiece. The descriptive statistics and the Tukey post hoc test of the ANOVA revealed that there were no statistically significant differences between the minimization surface roughness value of mild steel, stainless steel and brass. The result implies that irrespective of the material properties of the workpiece under the same process parameters condition, there are equal significant variation of surface roughness on mild steel, stainless steel and brass. The study concludes that regardless of the material properties for machining investigation using the same parameters, it is possible to have the same quality effect of surface roughness in terms of it minimization target.

Keywords: ANOVA, Comparison, Drilling, Minimization, Surface Roughness

Minimization Comparison of Surface Roughness Drilling Value of Mild Steel, Stainless Steel and Brass: An Application of One-Way Anova Technique (Published)

The study investigated on minimization comparison of surface roughness drilling value of mild steel, stainless steel and brass using one-way analysis of variance (ANOVA) technique so as to check for significant difference between the workpiece in their value of surface roughness using the same process parameters irrespective of their material properties. The experimental data used in the comparison were conducted nine (9) times for each of the workpiece. The descriptive statistics and the Tukey post hoc test of the ANOVA revealed that there were no statistically significant differences between the minimization surface roughness value of mild steel, stainless steel and brass. The result implies that irrespective of the material properties of the workpiece under the same process parameters condition, there are equal significant variation of surface roughness on mild steel, stainless steel and brass. The study concludes that regardless of the material properties for machining investigation using the same parameters, it is possible to have the same quality effect of surface roughness in terms of it minimization target.

Keywords: ANOVA, Comparison, Drilling, Minimization, Surface Roughness

SUBSURFACE GEOPHYSICAL MAPPING AND DRILLING OF ABA-ISU LIMESTONE DEPOSIT (SHEET 156E), SOUTH-EASTERN, NIGERIA. (Published)

Geoelectric mapping and drilling of Aba-Isu limestone deposit was carried out using a hybrid method, a combination of Wenner and Schlumberger resistivity techniques. The iso-resistivity maps indicated a roughly NW–SE trending of the limestone deposit. The resistivity values in the range of 40-260Ώm is inferred to be limestone with varying gradations, and relatively low resistivity values <40Ώm. Areas around the central line axis have resistivity values >100Ώm particularly for the “a” of 5m and 10m respectively and consistent and coincidental with the areas where the limestone massively outcropped. The study area indicated a 4-5 layer stratified alternating sequence of high and low resistivity horizons, the sequence start with high resistivity horizon with values >100 Ώm alternating with low-medium resistivity horizons with values in the range of 20-50Ώm. This sequence in 2 or 3 cycles and terminated by the highly conductive horizon with resistivity values of <20Ώms. The pseudo-sections, resistivity values greater 100Ώm are inferred as limestone, there is a consistency of these values on a trend coinciding with the central line axis. The same values are observed at various depths beneath the subsurface implying the occurrences of limestone which extend beyond 35m depth.

Keywords: Aba-Isu, Drilling, Geophysical Mapping, Limestone, Nigeria