Article
Version 1
Preserved in Portico This version is not peer-reviewed
Intelligent Tapping Machine: Tap Geometry Inspection
Version 1
: Received: 2 September 2023 / Approved: 4 September 2023 / Online: 5 September 2023 (07:57:41 CEST)
A peer-reviewed article of this Preprint also exists.
Lin, E.-Y.; Chen, J.-C.; Lien, J.-J.J. Intelligent Tapping Machine: Tap Geometry Inspection. Sensors 2023, 23, 8005. Lin, E.-Y.; Chen, J.-C.; Lien, J.-J.J. Intelligent Tapping Machine: Tap Geometry Inspection. Sensors 2023, 23, 8005.
Abstract
Currently, the majority of industrial metal processing involves the use of taps for cutting. However, existing tap machines require relocation to specialized inspection stations and only assess the con-dition of the cutting edges for defects. They do not evaluate the quality of the cutting angles and the amount of removed material. Machine vision, a key component of smart manufacturing, is com-monly used for visual inspection. Taps are employed for processing various materials. Traditional tap replacement relies on the technician's accumulated empirical experience to determine the ser-vice life of the tap. Typically, inspecting tooth wear involves removing the tap and evaluating the degree of wear to determine if regrinding or replacement is necessary. Therefore, we propose the use of visual inspection of the tap's external features to determine whether replacement or regrinding is needed. We examined the bearing surface of the tap and utilized single images to identify the cutting angle, clearance angle, and cone angles. By inspecting the side of the tap, we calculated the wear of each cusp. We further investigated whether the cutting portion affected the length of the tool by measuring changes in tooth surface area and the amount of removed thread. This inspection process can facilitate the development of a tap life system, allowing for the estimation of the durability and wear of taps and nuts made of different materials. Statistical analysis can be employed to predict the lifespan of taps in production lines.
Keywords
Tap; Tapping; Cutting angle; Clearance angle; Cone angles; Length of the tool; Tooth surface area; Amount of thread removal
Subject
Computer Science and Mathematics, Computer Vision and Graphics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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