Thin Tipped Circular Saw Blade Groove Geometry for Chip Splitting
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Solution Overview
Problem
Conventional circular saw blades with a thickness less than 2.0 mm are believed to exhibit poor durability and are prone to breaking due to the groove used to split cutting chips, limiting their effectiveness in high-speed cutting applications.
Innovation Solution
A tipped circular saw blade with a disc-shaped metal base and tips protruding radially, featuring a groove with a width of 0.20 mm to 0.30 mm and a chamfered angle to enhance chipping resistance and prevent scratches on workpiece surfaces, while maintaining a blade thickness of 0.8 mm to 1.1 mm for improved durability and effective cutting edge length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the blade thickness is reduced to enable high-speed cutting, then cutting speed is improved, but durability and resistance to breaking deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the blade thickness within 0.8-1.1mm and the groove width within 0.20-0.30mm, optimizing the structural parameters to achieve both high cutting speed and sufficient durability. The chamfered angle is also optimized to balance chip splitting effectiveness with resistance to thermal cracking.
2Object-generated harmful factors
If a groove is added to split cutting chips, then chip splitting capability is improved, but resistance to thermal cracking and chipping deteriorates
Solution Approach 1:
The patent optimizes the groove width parameter to 0.20-0.30mm, which is sufficient for effective chip splitting but narrow enough to minimize stress concentration. The chamfered angle is also optimized to reduce thermal cracking resistance while maintaining chip splitting capability.
Solution Approach 2:
The patent uses a composite structure combining the metal base material with the groove feature, where the groove geometry is specifically designed to split chips effectively while the surrounding material structure provides resistance to thermal cracking and chipping.
3Object-generated harmful factors
If the groove width is increased to improve chip splitting, then chip splitting capability is improved, but effective cutting edge length is reduced
Solution Approach 1:
The patent precisely optimizes the groove width parameter to 0.20-0.30mm, which provides sufficient chip splitting capability while minimizing the reduction in effective cutting edge length. This parameter optimization ensures both functions are adequately performed.
Data Source
AI summary
A tipped circular saw blade includes a disk-shaped metal base having a central axis of rotation, and a plurality of circumferentially-spaced tips extending radially outward from an outer periphery of the metal base. Each tip includes a flank along the radially outer portion thereof, a side face located along a side of the flank, and a chamfer extending between the flank and the side face. The chamfer is oriented at a chamfered angle with respect of the flank. Further, each tip includes a cutting edge located on an end of the flank in the circumferential direction. The cutting edge is configured to cut the workpiece. In addition, each tip includes a groove formed on the flank and extending circumferentially from the cutting edge. The width of the groove may be 0.20 mm to 0.30 mm.