Self-calibration of probe tip radius and cutting edge sharpness

Abstract BackgroundOsteotomes are bone cutting tools commonly reused in orthopedic surgical procedures. Despite undergoing rigorous cleaning, visual inspection and sterilization procedures between every use, the condition of the cutting blade edge is commonly not qualitatively assessed. Subjective feedback from surgeons suggests a large variation in osteotome cutting edge sharpness is found during use. This study seeks to investigate the retention of osteotome cutting-edge sharpness by comparing the wear resistance of as-supplied, electroless nickel, and titanium nitride coated osteotomes following a series of bone cutting tests.MethodsChanges in edge sharpness were assessed using visual inspection, depth penetration testing that quantified change in the blade sharpness index and scanning electron microscopy visual analysis. Visual inspection of each osteotome blade edge was then compared to qualitative blade sharpness index measurement.ResultsAfter use, no cutting-edge damage or change in blade sharpness was detected by visual examination of all three osteotomes however the as-supplied osteotome demonstrated 50% loss of blade sharpness index compared to 30% and 15% reduction for the electroless nickel and titanium nitride coated osteotomes respectively. This finding was supported by scanning electron microscopy evaluation that found greater mechanical damage had occurred along the cutting-edge of the as-supplied osteotome compared to the two coated with wear resistant materials.ConclusionsThe rapid loss of blade sharpness found in the as-supplied osteotome supports the degradation in cutting performance frequently reported by surgeons. The findings from this study demonstrates blade sharpness index better detects cutting edge wear compared to visual inspection. Results from this pilot study also suggest the coating of osteotomes in hard-wearing biocompatible materials assists in retaining cutting edge sharpness over multiple uses. Further study using a larger sample size is required to validate these findings.

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Cutting edge sharpness measurement using angle limited total integrated scattering

Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics ◽

10.1109/iecon.1993.339316 ◽

2002 ◽

Author(s):

Tang Wenyan

Keyword(s):

Cutting Edge ◽

Sharpness Measurement ◽

Edge Sharpness

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The Effect of Cutting Edge Sharpness on Cutting Characteristic of Polycarbonate

Advances in Intelligent Systems and Computing - Recent Global Research and Education: Technological Challenges ◽

10.1007/978-3-319-46490-9_8 ◽

2016 ◽

pp. 55-61

Author(s):

Yuki Kurita ◽

Katsuhiko Sakai ◽

Hiroo Shizuka

Keyword(s):

Cutting Edge ◽

Edge Sharpness

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Evaluation of cutting edge sharpness by transcribing the edge on thin wire.

Journal of the Japan Society for Precision Engineering ◽

10.2493/jjspe.55.2261 ◽

1989 ◽

Vol 55 (12) ◽

pp. 2261-2266 ◽

Cited By ~ 1

Author(s):

Kazuo NAKAYAMA ◽

Minoru ARAI ◽

Xiaodu WANG

Keyword(s):

Cutting Edge ◽

Thin Wire ◽

Edge Sharpness

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A Proposal of Process Strategy for Micro-Cutting Edge Fabrication: Effects of Shape Formation after Laser Hardening

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.625.545 ◽

2014 ◽

Vol 625 ◽

pp. 545-549 ◽

Cited By ~ 4

Author(s):

Keiji Ogawa ◽

Hirotaka Tanabe ◽

Heisaburo Nakagawa

Keyword(s):

Cutting Edge ◽

Laser Hardening ◽

Shape Accuracy ◽

Abrasive Resistance ◽

Micro Cutting ◽

Hardening Process ◽

Shape Formation ◽

Edge Sharpness ◽

Process Strategy

This paper proposes a novel process strategy for micro-cutting edge fabrication. Micro-cutting edges need a hardening process for the ridgeline parts that requires abrasive resistance, as well as edge sharpness and shape accuracy, based on their applications. Micro-cutting edge shapes also vary greatly in ridgeline profile and section. The proposed method is shape fabrication after laser hardening, which easily addresses these issues. In the present paper, effects of the proposed method are discussed and the results of a demonstration test are introduced.

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Numerical analysis of different cutting edge radii in hot micro-cutting of Inconel 718

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219875783 ◽

2019 ◽

Vol 234 (1) ◽

pp. 196-210

Author(s):

Xin Liu ◽

Xu Zhang ◽

Dazhong Wang

Keyword(s):

Cutting Force ◽

Nickel Alloy ◽

Cutting Edge ◽

Machining Process ◽

Depth Of Cut ◽

Flow State ◽

Micro Cutting ◽

Micro Parts ◽

Tip Radius ◽

Cutting Speeds

Mechanical micro-cutting is one of the advanced processes for manufacturing of micro-parts. During the micro-cutting process, the thickness of the uncut chip is very close to the tip radius of the tool. The cutting edge is used to cut and extrude the workpiece. In this paper, the experiments and simulations of macro-machining nickel alloy are compared, and the process of micro-cutting nickel alloy is simulated and analyzed. In this study, four cutting edge radii, three cutting speeds, six hot cutting temperatures, and a constant depth of cut are used. The radius of the cutting edge of different sizes is theoretically analyzed and verified by simulation of material flow state, temperature, stress, strain, and cutting force. The results show that the material separation points are very close together at different cutting edge radii. The change in the radius of the cutting edge changed the contact state of the material in the cutting area, which has a large influence on the temperature and cutting force. The effects of different cutting speeds and hot working temperature on the machining process are also discussed.

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Tribological Characterization of Steels for Cutlery: A New Methodology to Access Cutting Edge Sharpness

World Tribology Congress III, Volume 1 ◽

10.1115/wtc2005-63538 ◽

2005 ◽

Author(s):

J. D. B. De Mello ◽

P. S. S. Ba´lsamo

Keyword(s):

Plastic Deformation ◽

Chemical Composition ◽

Stainless Steels ◽

Sliding Wear ◽

Cost Effective ◽

Cutting Edge ◽

Tribological Behaviour ◽

Edge Sharpness ◽

Life Itself ◽

Tribological Characterization

In this work, the tribological behaviour of stainless steel used in cutlery is analysed. Professional knives were tested in well-controlled field conditions and the mechanism of cutting edge loss of sharpness was determined by using Scanning Electron Microscopy. It was determined that the mechanism which causes loss of sharpness in the cutting edge is plastic deformation whereas the edge life itself is mainly affected by abrasive wear during the resharpening process and the sliding wear that occurs while the knife is being used. A new methodology based on the energy that causes plastic deformation is proposed in order to access the bending resistance of the cutting edge. The proposed technique is very simple and cost effective. It reproduces to a great extent the field mechanisms that cause the loss of sharpness in the cutting edge and allows the ranking of different stainless steels usually used by the cutlery industry. Additionally, abrasive and sliding wear tests were carried out on martensitic and ferritic stainless steels. Although the chemical composition and heat treatment considerably modified the microstructure and hardness of the steels, they had no significant effect on abrasion resistance and friction coefficient. On the other hand the sliding wear rate was greatly affected by the chemical composition of the steel.

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