Asymmetric Bread-Knife Blade for Cost-Efficient Manufacturing
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Solution Overview
Problem
Existing bread-knife blades for machine saws are expensive to manufacture due to complex grinding techniques, resulting in high costs and environmental concerns in industrial settings where they are used.
Innovation Solution
A bread-knife blade design with asymmetric tooth breast and tooth back inclinations, flat grinding surfaces, and a carbon steel composition, allowing for a cost-efficient manufacturing process using multiple blades in a grinding machine with ceramic cutting edges and high-speed grinding wheels, reducing production costs and improving cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex grinding techniques are used to manufacture bread-knife blades, then cutting performance and blade quality are improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent applies asymmetry by designing the tooth breast with a specific inclination angle (20°-49°) that is different from the tooth back inclination, creating an asymmetric tooth profile. This asymmetric design allows for simplified manufacturing processes while maintaining effective cutting performance, resolving the contradiction between manufacturing complexity and blade quality.
Solution Approach 2:
The patent specifies precise parameter ranges for tooth breast inclination (20°-49°), tooth back inclination, and blade thickness (0.2-1.0 mm) that optimize cutting performance while enabling simpler manufacturing. By defining these parameters within specific ranges rather than requiring exact values, the patent achieves high blade quality through less complex manufacturing processes.
2Ease of operation
If traditional bread-knife blade designs are used, then cutting functionality is achieved, but sound levels during operation are excessively high
Solution Approach 1:
The asymmetric tooth profile with specifically inclined tooth breast and tooth back reduces vibration and noise during cutting operations. The asymmetric geometry distributes cutting forces more evenly, preventing the excessive sound generation associated with traditional symmetric blade designs, while maintaining effective cutting functionality.
3Productivity
If conventional blade designs are used, then cutting is achieved, but cutting waste is high and cutting surface quality is poor
Solution Approach 1:
The patent defines specific parameter ranges for tooth breast inclination (20°-49°) and blade thickness (0.2-1.0 mm) that optimize the cutting action. These parameter changes enable cleaner cuts with less waste and better surface quality, improving both productivity and material utilization efficiency compared to conventional designs.
4Ease of manufacture
If standard blade thickness is used, then manufacturing is simplified, but blade lifetime is reduced
Solution Approach 1:
The patent specifies an optimized thickness range of 0.2-1.0 mm that balances manufacturing simplicity with extended blade lifetime. This parameter change allows for easier manufacturing of thinner, more precise blades while the asymmetric tooth design compensates for the reduced thickness, maintaining durability and cutting effectiveness throughout the blade's service life.
Data Source
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AI summary
The present invention relates to a bread-knife blade for machine saws, which bread- knife blade (1) blade has teeth (2) with a tooth edge (E), a tooth breast (H) at the front of the tooth, seen in the sawing directing, a tooth back (F) behind the tooth edge (E), and a tooth bottom (B) between the tooth breast of each tooth and the tooth back of next tooth in front thereof, and tooth gaps, wherein a tooth gap (G) is defined as the space between the tooth edges (E) of two subsequent teeth (2), which knife blade has two flat sides (L, R), a right side (R) and a left side (L), when the knife blade is regarded obliquely from above in the sawing directing, wherein said tooth edge (E) consists of a point.