Tipped Saw Blade Edge Layout for Lower Cutting Power
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Solution Overview
Problem
Existing tipped saw blades face challenges in achieving low cutting resistance and power consumption, particularly in applications like rechargeable tipped saw cutters and stationary tipped saw cutters, where reducing cutting power is essential to extend battery life or reduce cutting time.
Innovation Solution
The tipped saw blade design incorporates a combination of flat edges and beveled edges, with specific relationships between their cutting edge line lengths and angles, ensuring that the sum of beveled edge lengths is less than twice that of flat edges, and the cutting edge line-related length A satisfies certain conditions to minimize cutting power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting edge line length is increased to improve cutting efficiency, then the cutting power requirement increases, but this contradicts the need for low power consumption in rechargeable and stationary tipped saw cutters
Solution Approach 1:
The patent applies local quality by differentiating between flat edges and beveled edges with distinct functions. Flat edges (with cutting edges parallel to the thickness direction) are optimized for primary material removal, while beveled edges (with inclined cutting edges) are optimized for smoothing lateral surfaces. This local differentiation allows each edge type to operate at optimal cutting edge line lengths for its specific function, reducing total power requirement while maintaining cutting efficiency.
Solution Approach 2:
The cutting edge is segmented into multiple discrete edges (flat edges and beveled edges) arranged around the disc perimeter. Each edge acts as an independent cutting element, allowing the total cutting workload to be distributed across multiple edges rather than requiring one long continuous cutting edge. This segmentation enables the sum of beveled edge cutting edge line lengths to be controlled relative to flat edge lengths, optimizing power consumption.
2Manufacturing precision
If more beveled edges are added to smooth lateral surfaces, then the cutting power increases, but this may affect chip discharge efficiency
Solution Approach 1:
The patent controls the inclination angle parameter of beveled edges and the ratio of beveled edge cutting edge line length sum to flat edge cutting edge line length sum. By optimizing these parameters, the beveled edges effectively smooth lateral surfaces without excessive power consumption. The inclination angle and length ratio are tuned to achieve surface smoothness while maintaining efficient chip discharge pathways.
3Power
If the cutting edge line length is reduced to lower cutting power, then chip discharge may be affected, but proper design can maintain both low power and efficient chip discharge
Solution Approach 1:
The cutting edge is divided into multiple short segments (individual flat and beveled edges) rather than one long continuous edge. This segmentation naturally creates gaps between edges that serve as chip discharge pathways. Even with reduced individual edge lengths, the distributed arrangement of multiple edges maintains effective chip ejection by preventing chip accumulation and allowing continuous discharge through the spaces between adjacent edges.
Data Source
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AI summary
A tipped saw blade includes a disc-shaped base metal and tips each having an edge selected from flat edges, left beveled edges, and right beveled edges. The tips are joined at and around an outer periphery of the base metal. The flat edges includes a cutting edge that is parallel to a thickness direction of the base metal. The left beveled edges and right beveled edges include respective cutting edges that are inclined with respect to the thickness direction of the base metal. Cutting edge line lengths correspond to the lengths at which the cutting edges come in contact with a workpiece when cutting the workpiece. The cutting edges have the following relationship: (sum of cutting edge line lengths of the plurality of beveled edges) ≤ [((cutting edge line length of one of the flat edges) - (kerf thickness + 1.5)) × (number of the plurality of flat edges) × 1.2].