Grinding Drum Guide Geometry for Consistent Nano-Trench Depth
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Solution Overview
Problem
Existing grinding machines struggle to create consistent and precise nano-trenches due to the horizontal offset of the grinding drum axis from the wheel axis, leading to variations in trench depth over uneven terrain.
Innovation Solution
A grinding tool with a grinding drum and horizontally aligned guides, where the guides' curvature is concentric with the drum's curvature, ensuring a consistent grinding depth regardless of terrain contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the grinding drum is positioned between front and rear wheels with horizontal offset, then the machine can travel over the surface, but it cannot maintain consistent grinding depth over varying road contours
Solution Approach 1:
The patent introduces guide wheels as intermediary elements that contact the road surface directly to sense contours, while the grinding drum remains horizontally offset for mobility. The guide wheels act as mediators between the road surface and the grinding drum, enabling depth control without compromising the machine's ability to traverse the surface.
Solution Approach 2:
The patent transitions from a single-plane wheel-grindor configuration to a multi-dimensional arrangement where guide wheels and grinding drum operate in different vertical planes. This dimensional separation allows the guide wheels to follow road contours while the grinding drum maintains consistent depth through the vertical offset connection.
2Adaptability or versatility
If the grinding drum is horizontally offset from the wheel axis, then the machine can navigate terrain, but the grinding depth varies over crests and valleys
Solution Approach 1:
The guide wheels serve as intermediary sensors that detect road contour variations, while the vertically offset grinding drum acts as the precision cutting element. The mechanical connection between guide wheels and grinding drum transmits contour information vertically, enabling precise depth control independent of horizontal positioning.
Solution Approach 2:
The patent creates a dynamic system where the guide wheels freely follow road contours in the horizontal plane, while the vertical offset connection dynamically adjusts the grinding drum depth. This dynamic arrangement allows the system to adapt to varying terrain while maintaining consistent grinding depth through the vertical geometric constraint.
3Productivity
If large equipment is used for micro-trenching, then material removal capability is increased, but equipment cost and debris disposal cost increase
Solution Approach 1:
The patent changes the operational parameters of the grinding drum, including rotation speed, blade configuration, and depth control mechanism, to achieve efficient material removal with a compact device. By optimizing these parameters, the system attains high productivity comparable to large equipment while maintaining a smaller, more cost-effective form factor.
Solution Approach 2:
The grinding drum is segmented with multiple independently positioned blades that can be configured to optimize cutting efficiency. This segmentation allows the compact drum to remove material as effectively as larger equipment while generating less debris and requiring smaller disposal capacity.
Data Source
AI summary
Disclosed herein are walk behind grinding tools with horizontally aligned guides and grinding drum. One embodiment relates to a grinding tool with a pair of guides on opposing sides of a blade set of a grinding drum, where the pair of guides is configured to limit a grinding depth of the grinding drum. At least a portion of a guide curvature is generally concentric with a mill curvature, and a guide radius is less than a mill radius. Another embodiment relates to a grinding system including a grinding tool with a vacuum shroud hingedly attached to a front of a main body of a grinding housing, and a vacuum including a vacuum tube in fluid communication with the vacuum shroud. Another embodiment relates to a method of forming a grinding tool.