Spiral Cutting Tool Blank with Central Flushing Channel Layout
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Solution Overview
Problem
Existing spiral cutting tools with off-center spiral channels face material accumulation at the central axis, leading to impaired cutting performance and increased tool wear due to material being flushed both outward and inward, particularly in multi-edged tools.
Innovation Solution
A cylindrical sintered blank with a centrally located flushing channel and spiral cooling channels that extend along the tool's longitudinal axis, preventing material from being flushed towards the center, and allowing separate fluid flows for optimized material removal and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If off-center spiral cooling channels are used, then each cutting edge can be adequately cooled and lubricated, but material accumulates at the central axis impairing cutting effect
Solution Approach 1:
The invention divides the fluid conveyance function into two separate channels: a central flushing channel and off-center cooling channels. The flushing channel specifically handles material removal by conveying fluids centrally along the longitudinal axis, while the cooling channels focus on thermal management. This segmentation allows each channel to optimize its specific function without interfering with the other, preventing material accumulation at the center while maintaining effective cooling.
Solution Approach 2:
The central flushing channel acts as an intermediary element that mediates between the off-center cooling channels and the external environment. It receives materials flushed from the cooling channels and directs them outward along the longitudinal axis, preventing material from accumulating at the central axis while allowing the cooling channels to maintain their off-center position for effective cooling.
2Temperature
If off-center spiral cooling channels are used, then individual cutting edges receive adequate cooling, but material is flushed towards the central axis increasing tool wear
Solution Approach 1:
The invention segments the fluid flow paths into distinct cooling and flushing functions. The cooling channels remain off-center to provide adequate cooling to individual cutting edges, while the separate central flushing channel handles material removal by directing fluids along the longitudinal axis, preventing material from being flushed towards the central axis and reducing tool wear.
3Temperature
If cooling channels are located beneath cutting edges, then effective cooling is achieved, but channel diameter is limited to maintain blank stability
Solution Approach 1:
The invention applies local quality by positioning cooling channels specifically beneath the cutting edges where cooling is most needed, while maintaining a central flushing channel that does not compromise blank stability. The cooling channels have limited diameter (0.20 mm to 0.70 mm) to maintain blank stability, while the flushing channel has a larger diameter (1.10 mm to 1.50 mm) to effectively remove materials without being constrained by stability requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively prevents material accumulation at the tool's center, enhancing cutting performance and reducing wear by ensuring efficient outward material discharge and optimized cooling.
Implementation Method 1
A fluid can be passed through the central flushing channel, creating a flow away from the center of the subsequent cutting tool
Implementation Method 2
The flow of fluids through the channels reduces friction between the cutting edges of the cutting tool and the material being machined, and also cools the tool
Implementation Method 3
Fluids can also be used to remove removed material
Data Source
Figure 1~2
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AI summary
Cylindrical sintered blank 1 for a spiral cutting tool 10 with at least one cutting edge, wherein the sintered blank 1 comprises a rectilinear flushing channel 2 and at least one spiral cooling channel 3 running in its interior, wherein the flushing channel 2 runs centrally along the longitudinal axis of the sintered blank 1 and wherein the at least one spiral cooling channel 3 is arranged spirally around the flushing channel 2.