Cutting edge sharpness measurement using angle limited total integrated scattering

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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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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Self-calibration of probe tip radius and cutting edge sharpness

Surface Metrology for Micro- and Nanofabrication ◽

10.1016/b978-0-12-817850-8.00012-1 ◽

2021 ◽

pp. 405-427

Author(s):

Wei Gao

Keyword(s):

Cutting Edge ◽

Self Calibration ◽

Edge Sharpness ◽

Tip Radius

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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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Using Pulse Laser Processing to Shape Cutting Edge of PcBN Tool for High-Precision Turning of Hardened Steel

International Journal of Automation Technology ◽

10.20965/ijat.2013.p0337 ◽

2013 ◽

Vol 7 (3) ◽

pp. 337-344 ◽

Cited By ~ 11

Author(s):

Daisuke Suzuki ◽

◽

Fumihiro Itoigawa ◽

Keiichi Kawata ◽

Takashi Nakamura ◽

...

Keyword(s):

High Precision ◽

Laser Processing ◽

Chemical Reactivity ◽

Cubic Boron Nitride ◽

Cutting Tools ◽

Surface Hardness ◽

Hardened Steel ◽

Cutting Edge ◽

Precision Turning ◽

Edge Sharpness

Polycrystalline Cubic Boron Nitride (PcBN) cutting tools have excellent characteristics, such as a high degree of hardness and low chemical reactivity, so they have the potential to replace the high precision grinding of hardened steel with high precision cutting. However, there are some problems inherent in so-called sintered materials, including low formability and unsteady wear. In order to solve these problems, pulsed laser processing is applied to shape a cutting edge. In this study, first PcBN cutting tools processed by lasers are adopted to the high-precision turning of hardened steel with 58HRC. As the result, these PcBN cutting tools provide a steady cutting state and a smoother finished surface. Second, in order to investigate these advantages of PcBN cutting tools processed by laser, individual requirements of the cutting tool are investigated: edge sharpness, surface quality including micro-defects, surface hardness, and friction coefficient. The results indicate that tools processed by laser have sharper edges and smoother, harder, and lowerfiction surfaces, compared to ground tools. Above all, the increase in surface hardness improves cutting performance because of it provides higher wear resistance.

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