Wear detection on twist drill cutting lips using digital microscope

Name: Raiminor Ramzi

Organization : Universiti Sains Malaysia. School of Mechanical Engineering

Name: Elmi Abu Bakar

Organization : Universiti Sains Malaysia. School of Aerospace Engineering

Email : meelmi@usm.my

keyword: Wear Detection

ThaSH: Twist drills

; Twist drill quality

ThaSH: Microscopes

ThaSH: Image processing -- Digital techniques

ThaSH: Maintenance

Abstract: Twist drill is normally used for hole making operation. It may vary in shape, size and composition depending on the application, size of the hole and also material of the workpiece. Drilling on a material with great hardness such as composite panels would be very challenging. The drill bit will experience greater fatigue and worn out faster. This will cause undesirable damage on the workpiece. Therefore, a regular human vision inspection and drill bit sharpness test are required to ensure the drill bit used is in a good condition and still able to produce a perfect hole without damaging the workpiece. The study on detecting the twist drill wear will contribute in solving the problem aforementioned. In this research, a method is proposed in detecting and measuring the presence of wear on the twist drill. The proposed method is done by comparing the images of both new and worn twist drill from the top view perspective in order to obtain a full image of the cutting lips. The top view images are acquired using digital microscope and processed through MATLAB using two different approaches which are Sum of Absolute Different (SAD) and Image Fusion. The percentage of wear for each method is calculate and compared. With photographic evidence, this research found that during the process of drilling, the twist drill not only losing its material due to friction but also experiencing a shape deformation which also contribute to the wear factor of the cutting lips.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2016

Modified: 2026-07-20

Issued: 2026-07-20

บทความ/Article

application/pdf

BibliograpyCitation : In Chulalongkorn University Faculty of Engineering. The 7th TSME International Conference on Mechanical Engineering 2016 (TSME-ICoME7) (AMM0002). Bangkok : Chulalongkorn University

eng

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