Segmented Saw Chain for Chip Removal and Cutting Stability
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Solution Overview
Problem
Existing saw chains face issues with chips accumulating between the chain and the object being cut, and the object shaking against the chain during cutting, particularly when cutting objects not securely held in place.
Innovation Solution
A saw chain design with reduced kerf width, depth, and chain pitch, featuring alternately arranged cutting and tie straps, which minimizes cutting portion size and increases gap formation between the chain and the object, facilitating chip removal and reducing shaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the kerf width and depth are reduced to minimize cutting portion size, then the object shaking is suppressed, but the chip removal becomes more difficult
Solution Approach 1:
The chain is segmented into multiple links with varying functions - cutting links that perform cutting and tie straps that provide structural support. This segmentation allows the cutting portions to be small for stability while the tie straps maintain chain integrity and facilitate chip removal through the gaps between links.
Solution Approach 2:
Different parts of the chain have different properties - cutting links have sharp cutting blades for precise cutting with minimal shaking, while tie straps have open structures that facilitate chip removal. This local differentiation resolves the contradiction between minimizing shaking and enabling chip removal.
2Object-generated harmful factors
If the chain pitch is increased to facilitate chip removal, then the chip accumulation is suppressed, but the cutting precision may be reduced
Solution Approach 1:
The chain is divided into cutting links and tie straps with a larger pitch between them. This segmentation creates sufficient space for chip removal while maintaining precise cutting edges on the cutting links, resolving the contradiction between chip removal and cutting precision.
3Stability of the object's composition
If the cutting portion size is reduced to suppress object shaking, then the cutting stability is improved, but the cutting speed may be reduced
Solution Approach 1:
The chain is designed with multiple cutting links distributed along its length, allowing continuous cutting action. While each individual cutting portion is small for stability, the cumulative effect of multiple cutting links maintains high cutting speed through continuous engagement with the workpiece.
Solution Approach 2:
The alternating arrangement of cutting links and tie straps creates a periodic cutting pattern. This periodic action with multiple cutting points maintains cutting speed while each small cutting portion ensures cutting stability, resolving the contradiction between cutting speed and stability.
Data Source
AI summary
A saw chain disclosed herein may be configured to be movably mounted along a periphery of a guide bar. The saw chain may include a plurality of drive links, a plurality of side links, and a plurality of connection pins. At least two side links of the plurality of side links may each include a cutting portion including a cutting blade and a depth gauge. A kerf width of the saw chain may be in a range of 4.3 mm to 4.6 mm. A depth of the saw chain may be in a range of 0.1 mm to 0.3 mm. A chain pitch of the saw chain may be in a range of 8.0 mm to 8.5 mm.