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A technique for field measurement of knife sharpness
Raymond W McGorry1, Peter C Dowd, Patrick G Dempsey
1Liberty Mutual Research Institute for Safety, 71 Frankland Road, Hopkinton, MA 01748, USA. raymond.mcgorry@libertymutual.com
Applied Ergonomics
|May 21, 2005
Summary
A new portable knife sharpness tester was developed for meatpacking plants. This device accurately measures blade sharpness, ensuring safety and productivity by detecting defects and variations along the entire knife edge.
Area of Science:
- Food Science and Technology
- Industrial Engineering
- Occupational Safety and Health
Background:
- Knife sharpness is critical for meatpacking efficiency and worker safety.
- Existing methods for assessing knife sharpness may be inadequate for field use in meatpacking environments.
Purpose of the Study:
- To develop and evaluate a portable, user-friendly knife sharpness tester for meatpacking operations.
- To ensure the tester provides non-destructive, representative, and comprehensive blade edge analysis.
Main Methods:
- Development of a portable sharpness tester with a motion simulating meat cutting.
- Bench testing for sensitivity to sharpness changes, test material suitability, and edge variation detection.
- Correlation analysis between tester measurements and actual cutting forces using a test material and red meat.
Main Results:
- The tester demonstrated sensitivity to incremental changes in blade sharpness.
- High correlation (r = 0.89) was found between measurements using the test material and red meat.
- The system successfully detected sharpness variations and visual defects along knife blade edges.
Conclusions:
- The developed sharpness tester is a viable tool for assessing knife sharpness in meatpacking settings.
- The portable system offers a non-destructive, reliable method to enhance safety and productivity.
- The tester's ability to detect edge defects and variations is crucial for quality control.