DEVELOPMENT AND EVALUATION OF A DRILL RE-GRINDING FIXTURE

Authors

  • SO Ejiko DEPARTMENT OF MECHANICAL ENGINEERING, THE FEDERAL POLYTECHNIC, ADO-EKITI, EKITI STATE, NIGERIA
  • JT Adu DEPARTMENT OF MECHANICAL ENGINEERING, OBAFEMI AWOLOWO UNIVERSITY, IFE, OSUN STATE, NIGERIA
  • HA Owolabi DEPARTMENT OF MECHANICAL ENGINEERING, OBAFEMI AWOLOWO UNIVERSITY, IFE, OSUN STATE, NIGERIA

DOI:

https://doi.org/10.4314/njt.362.1292

Keywords:

design, evaluation, drill, fixture, grinding, cost.

Abstract

Generally, manual method of re-grinding drills poses the dangers of damage and accidents. This paper reports the method used in the design, fabrication and testing of the drill re-grinding fixture. The fabricated fixture can withstand maximum normal and tangential forces of 121.34 N and 87.76 N respectively. The developed fixture shows it is suitable as work holding device for re-grinding drills bits with diameter of at least 4.5 mm and above without breakage and difficulty. The average time for complete re-grinding is about six minutes (loading and unloading time inclusive) and no injuries were recorded. The grinded surfaces conform to the standard tool geometry for a twist drill. Hence, the use of this drill re-grinding fixture in the engineering workshops obviates the rigor of manual handling of drills during grinding.

http://dx.doi.org/10.4314/njt.v36i2.16

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Published

2017-03-31

Issue

Section

Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering

How to Cite

DEVELOPMENT AND EVALUATION OF A DRILL RE-GRINDING FIXTURE. (2017). Nigerian Journal of Technology, 36(2), 437-443. https://doi.org/10.4314/njt.362.1292