Inclined-Insert Blade Tip for Wear-Resistant Soil Penetration
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Solution Overview
Problem
Blades used in soil cultivation, such as plough tips and cultivator shares, experience excessive wear due to abrasive soil, and existing protective methods like hardfacing or attaching hard material plates increase thickness and resistance, making them less effective.
Innovation Solution
A blade tip design featuring grooves extending forwardly inclined towards a tip insert, with hard material inserts mounted within, providing enhanced wear resistance and reduced thickness, allowing easier soil penetration and lower pulling forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardfacing or hard material plates are applied on blade surfaces, then wear resistance is improved, but blade thickness increases and soil penetration ability deteriorates
Solution Approach 1:
The blade is divided into multiple segments with different material properties: the base body provides structural support while grooves contain hard material inserts at critical wear zones. This segmentation allows the blade to have thin overall thickness for easy soil penetration while concentrating hard materials only where needed for wear protection.
Solution Approach 2:
Hard material inserts are placed locally in grooves at specific high-wear areas (leading edge, side faces, bottom surface) rather than covering the entire blade surface. This local application provides wear resistance exactly where soil contact occurs most intensely, while keeping the rest of the blade thin and lightweight for better soil penetration.
2Reliability
If hard material plates are brazed or glued on blade surfaces, then wear resistance is improved, but mounting stability deteriorates due to plate detachment
Solution Approach 1:
The blade structure is segmented with grooves that contain hard material inserts, creating a modular assembly where each insert is independently secured in its groove. This segmentation allows for better mechanical interlocking and stability compared to large continuous plates, as each insert is constrained by groove walls on multiple sides.
Solution Approach 2:
The grooves act as intermediary structures that mechanically interlock the hard material inserts with the base body. The groove geometry provides lateral confinement and bonding surface area, serving as an intermediary mechanism that enhances mounting stability beyond simple surface bonding.
3Ease of manufacture
If grooves extend perpendicular to the top surface, then manufacturing is simplified, but wear protection area on side faces is reduced
Solution Approach 1:
The grooves are designed with asymmetric geometry, extending at an inclination angle (e.g., 45 degrees) relative to the top surface rather than perpendicular to it. This asymmetric orientation allows the grooves to reach the side faces of the blade, significantly increasing the protected area on vertical surfaces while still being manufacturable through standard machining processes.
Solution Approach 2:
The groove extension is extended into a new dimension by inclining them at an angle rather than extending only vertically. This dimensional change allows the grooves to reach the side faces of the blade, providing wear protection on previously unprotected vertical surfaces without requiring additional manufacturing steps.
4Reliability
If grooves extend deeper into the main body, then hard material coverage is improved, but structural strength deteriorates
Solution Approach 1:
The grooves extend deeply into the base body only in specific localized areas where wear protection is most critical (leading edge and side faces), while maintaining adequate base material thickness in other areas to preserve overall structural strength. The groove depth and positioning are optimized to provide maximum wear protection with minimum impact on blade strength.
Data Source
Figure 1~4
Figure 5~6
Figure 7a~7c
AI summary
Blade tip (1) for an agricultural cultivation machine, the blade tip (1) comprising a main body (11) formed from a base material with at least one groove (2) extending from a top surface (5) into the main body (11), the at least one groove (2) having at least one hard material insert (4) mounted therein, such that the hard material insert (4) extends to a side face (12) of the blade tip (1), the blade tip (1) further has a tip portion (31) with a tip recess (3) with a tip insert (41) mounted therein, wherein at least one groove (2) extends forwardly inclined towards the tip insert (41).