Multi-Coated Cutting Blade for Balanced Edge Service Life
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Solution Overview
Problem
Cutting blades made of pure hard alloy have limited application due to high friction, susceptibility to built-up edges, and short service life, leading to mismatched service life of cutting edges and potential damage during processing, resulting in unsatisfactory cutting performance and increased replacement rates.
Innovation Solution
A cutting blade with multiple distinct coatings on its surfaces, featuring a main cutting edge, secondary cutting edge, and angular cutting edge, each with specific coatings (such as TiAIN and Al2O3 or TiN) tailored to optimize performance and extend service life across varying cutting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single uniform coating is applied to all cutting edges, then the manufacturing process is simple, but the service life of different cutting edges becomes mismatched
Solution Approach 1:
The patent applies different coating materials or thicknesses to different cutting edges based on their specific working conditions. The main cutting edge receives a coating optimized for its cutting function, while the secondary cutting edge receives a different coating suited to its scraping function. This local differentiation ensures that each cutting edge has optimal protection and wear resistance tailored to its specific operational demands, resolving the service life mismatch problem.
Solution Approach 2:
The cutting blade is segmented into multiple cutting edges (main cutting edge and secondary cutting edge), and each segment is independently coated with appropriate coating materials. This segmentation allows independent optimization of each cutting edge's coating characteristics, enabling differentiated service life and performance for each edge based on its functional requirements.
2Ease of manufacture
If the cutting blade is scrapped due to damage of a certain cutting edge, then the manufacturing cost is reduced, but the cutting life is unsatisfactory
Solution Approach 1:
The patent designs the cutting blade with multiple cutting edges where the main cutting edge and secondary cutting edge can function at different times. When the main cutting edge becomes worn or damaged, the secondary cutting edge can continue to perform scraping operations, allowing the blade to be reused rather than scrapped. This extends the overall service life of the blade and reduces replacement frequency.
Solution Approach 2:
The cutting blade is designed with multi-functionality by incorporating both main cutting edge for cutting operations and secondary cutting edge for scraping operations. This universal design allows the blade to perform multiple functions and remain operational even when one cutting edge is damaged, thereby extending the blade's overall cutting life and reducing replacement rates.
3Strength
If pure hard alloy is used for the cutting blade, then the blade intensity is sufficient, but friction is high and built-up edges form easily
Solution Approach 1:
The patent uses composite material structure by combining pure hard alloy substrate with refractory hard compound coatings (such as carbides, nitrides, and oxides). The hard alloy provides the necessary blade intensity and structural strength, while the coating layers provide low friction coefficient and resistance to built-up edges. This composite structure synergistically combines the advantages of both materials.
Solution Approach 2:
The refractory hard compound coatings are applied specifically to the cutting edges and surfaces where friction and built-up edges occur, while the bulk of the blade remains as pure hard alloy for structural strength. This local application of different material properties optimizes the blade's performance by providing low friction and anti-built-up edge characteristics only where needed.
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
This approach enhances cutting efficiency and extends the service life of all cutting edges, ensuring consistent performance and reducing replacement rates by allowing for targeted enhancement of different cutting capacities and wear resistance, thereby minimizing the risk of failure from edge damage.
Implementation Method 1
the surfaces of the cutting blade feature high rigidity, high wear resistance, high heat resistance, low friction coefficient and effectiveness to eliminate built-up edges
Implementation Method 2
the surfaces of the cutting blade feature high rigidity, high wear resistance, high heat resistance
Implementation Method 3
the surfaces of the cutting blade feature high rigidity, high wear resistance, high heat resistance
Implementation Method 4
applying one or more layers of refractory hard compounds, such as carbides, nitrides and oxides
Data Source
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AI summary
A cutting blade having a plurality of different coatings on surfaces thereof, including an upper surface (2), a lower surface (3), and a side surface (4) connecting the upper surface (2) and the lower surface (3), wherein the upper surface (2) intersects the side surface (4) to form at least one cutting edge unit (5), the cutting edge unit (5) includes a main cutting edge (51) and a secondary cutting edge (52), the upper surface (2) includes at least one set of cutting planes (1), the cutting planes (1) include a main cutting surface (21) and a secondary cutting surface (22), the main cutting surface (21) intersects the side surface (4) to form the main cutting edge (51), the secondary cutting surface (22) intersects the side surface (4) to form the secondary cutting edge (52), a main coating (211) is provided on the main cutting surface (21), a secondary coating (221) is provided on the secondary cutting surface (22), and the main coating (211) and the secondary coating (221) are independent from each other. By means of providing different coatings on different cutting planes, the performance of each cutting edge is optimized such that the service life of each cutting edge is consistent, thus extending the overall service life of the blade, and reducing the replacement rate.