Corrugated Knife Assembly With Nested Tab Blades for Julienne Cutting
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Solution Overview
Problem
Existing julienne-type knives require metallurgical bonding of tab blades to primary blades, which increases manufacturing costs and complexity.
Innovation Solution
A knife assembly comprising a primary blade with a corrugated wave pattern and a secondary blade that nests with the primary blade, featuring tab blades formed by modifying a blank identical to the primary blade, eliminating the need for metallurgical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tab blades are metallurgically bonded to primary blades, then the knife assembly achieves structural integrity for julienne cuts, but manufacturing costs and complexity increase
Solution Approach 1:
The knife assembly is divided into separate primary blade and secondary blade components. The secondary blade with tab blades is detached from the primary blade, allowing independent manufacturing and assembly. This segmentation eliminates the need for complex metallurgical bonding while maintaining structural integrity through mechanical attachment.
Solution Approach 2:
The secondary blade is designed to nest within or alongside the primary blade during operation, with the tab blades extending from the secondary blade to perform the julienne cutting function. This nesting arrangement allows both blades to work together as a unified system without requiring permanent bonding.
2Reliability
If tab blades are metallurgically bonded to primary blades, then the knife assembly achieves structural integrity, but manufacturing costs increase
Solution Approach 1:
By segmenting the knife assembly into separate primary and secondary blades, each component can be manufactured independently using standard processes. This eliminates the need for expensive metallurgical bonding operations while maintaining the required structural integrity through simple mechanical attachment methods.
Solution Approach 2:
The secondary blade is designed as a separate copy or replica of the primary blade structure, with tab blades formed by modifying the blank. This copying approach allows use of identical or similar manufacturing processes for both components, reducing overall manufacturing cost while achieving the same functional result.
3Ease of manufacture
If a blank identical to the primary blade is modified to create the secondary blade, then manufacturing simplicity is achieved, but the secondary blade requires precise nesting with the primary blade
Solution Approach 1:
The secondary blade is modified from the blank by creating localized features (tab blades) at specific positions along its length. These local modifications are made through controlled cutting and bending operations that preserve the overall simplicity of the blank structure while adding the necessary functional elements for julienne cutting.
Solution Approach 2:
The blank is pre-formed with the corrugated wave pattern and peak-valley structure before final assembly. This preliminary formation of the basic blade geometry allows for simpler subsequent modifications to create the tab blades, reducing the overall manufacturing precision requirements during the final assembly stage.
Data Source
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AI summary
Knife assemblies having primary and secondary blades and at least one tab blade. The primary and secondary blades each have a corrugated shape as a result of defining a wave pattern that defines peaks and valleys. The primary and secondary blades each further having upper and lower surfaces, leading and trailing edges, and a depth defined by and between the leading and trailing edges. The upper surface of the primary blade and the lower surface of the secondary blade are complementary so that the secondary blade and the peaks and valleys thereof are able to nest on the primary blade and the peaks and valleys thereof. The secondary blade has at least one tab blade that projects from one of its peaks and is defined by a cut in the peak to form a tab that is bent so that the tab projects from the peak