Variable-Pitch Cutting Blade Stamping and Grinding
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Solution Overview
Problem
Current cutting blades are not optimized for achieving an optimum cutting result across various types of food, and existing methods for producing notched toothing are limited in producing variable-pitch toothing and require complex processes involving grinding wheels and stamping.
Innovation Solution
A method and installation for producing a cutting blade with a notched toothing using a stamping device with two-part press dies to create the tooth pattern and a flat grinding wheel for sharpening, allowing for variable tooth pitch and shape, enabling efficient cutting of different food types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a shaped or serrated grinding wheel is used to produce notched toothing on a cutting blade, then the cutting blade can be sharpened and notched, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-forming the negative toothing profile directly onto the grinding wheel surface using a template or master form. This pre-prepared profile is then repeatedly used to stamp and form notched toothing on multiple cutting blades, eliminating the need to manually prepare shaped grinding wheels for each blade and significantly reducing manufacturing complexity while maintaining precision
Solution Approach 2:
The patent uses copying by creating a master template or form with the desired toothing profile and using it to stamp the negative profile onto the grinding wheel surface. This copied profile is then repeatedly transferred to multiple cutting blades, allowing consistent reproduction of the toothing pattern without requiring complex custom grinding wheel preparation for each blade
2Manufacturing precision
If a cylindrical grinding wheel is used for non-rectilinear cutting edges, then the blade can be ground, but the blade must be rotated according to the radius of its cutting edge, increasing operational complexity
Solution Approach 1:
The patent applies inversion by reversing the traditional approach: instead of rotating the blade against a cylindrical grinding wheel, the cutting blade is held stationary and a flat-faced stamping device with the negative toothing profile is pressed directly onto the blade's cutting edge. This eliminates the need for blade rotation while maintaining shaping accuracy
Solution Approach 2:
The patent addresses curved cutting edges by using a flat stamping surface that conforms to the blade's geometry through direct contact. The stamping die is designed to match the curvature of the cutting edge, allowing the flat-faced stamp to transfer the toothing profile accurately onto curved surfaces without requiring blade rotation
3Productivity
If existing stamping methods are used to produce notched toothing, then production can be simplified, but variable-pitch toothing cannot be produced
Solution Approach 1:
The patent applies dynamics by making the stamping die profile adjustable and interchangeable. Different stamping dies with various pitch patterns can be quickly swapped on the stamping device, allowing the same equipment to produce both fixed-pitch and variable-pitch toothing. This dynamic adaptability enables variable-pitch toothing production while maintaining high manufacturing efficiency through rapid die changes rather than complex reconfiguration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method allows for the production of cutting blades with reproducible, variable-pitch toothing that enhances cutting performance across diverse food types, improving efficiency and cost-effectiveness in manufacturing.
Implementation Method 1
a stamping device (1500) comprising a press in two parts (1510, 1520) carrying, on the one hand, the imprints of a notch to be affixed to the edge of a cutting blade, and, on the other hand, a shaped imprint to conform said cutting blade
Implementation Method 2
a grinding wheel (1400) having a flat abrasive surface adapted to bear against a notched face of the cutting blade to remove material between said notches and sharpen the notched teeth of the cutting blade
Data Source
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AI summary
The invention relates to a method for producing serrated teeth (118) on a cutting blade (100) which has a curved edge (112). According to the invention, the raw cutting blade is stamped to form in relief, on its curved edge, a series of notches (140, 141, 142, 143; 240, 241) spaced at a pitch that varies along a cutting edge (116) so as to obtain serrated teeth (18) with a single series of teeth (120, 121, 122, 123; 220, 221, 223) which follow one another at a pitch that varies along the curved edge, then a serrated face (110) of the cutting blade is ground using a flat abrasive surface to sharpen the serrated teeth.