Decentralized Cooling Channels for Reamer Stability
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Solution Overview
Problem
Existing high-performance reamers face challenges in optimizing coolant or lubricant supply, leading to weakened mechanical stability and ineffective minimum quantity lubrication due to central cooling channels and electroerosion, which result in deflected coolant flow and separation of air/oil mixtures.
Innovation Solution
The reamer features decentralized cooling channels arranged at various angular values along its longitudinal axis, allowing for direct, straight flow to chip flutes without additional bores or material weakening, ensuring effective lubrication and preventing coolant flow deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a central cooling channel is used to supply chip flutes with coolant, then the cooling channel can be arranged axially along the longitudinal axis, but the mechanical stability of the reamer is weakened due to electroerosion and the coolant flow is deflected resulting in separation of air/oil mixture
Solution Approach 1:
The patent applies asymmetry by positioning the cooling channel off-center (decentralized) relative to the reamer's longitudinal axis. The cooling channel is arranged at a specific angle (e.g., 30°) to the longitudinal axis, creating an asymmetric configuration that allows the channel to open directly into chip flutes without requiring electroerosion. This asymmetric placement maintains the structural integrity of the reamer while enabling effective coolant delivery to the cutting edges.
2Ease of operation
If additional bores or openings are created to supply cutting edges with coolant, then coolant can reach all chip flutes, but the mechanical stability of the reamer is further weakened
Solution Approach 1:
The patent segments the coolant delivery system by providing individual cooling channels for specific chip flutes rather than attempting to supply all flutes through a single central channel. Each cooling channel is independently positioned to open into its corresponding chip flute, enabling targeted coolant delivery without requiring additional bores or openings that would compromise the reamer's structural strength.
3Device complexity
If a central cooling channel is used, then the cooling channel structure is simplified, but minimum quantity lubrication becomes ineffective due to deflection of coolant flow and separation of air/oil mixture
Solution Approach 1:
The asymmetric, decentralized positioning of the cooling channel enables straight-line coolant flow directly into the chip flutes without the 90° deflections required by central channel configurations. This asymmetric arrangement preserves the integrity of the air/oil mixture in minimum quantity lubrication applications, ensuring effective lubrication while maintaining a relatively simple single-channel structure.
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
This design enhances mechanical stability and enables effective minimum quantity lubrication by avoiding material weakening and flow deflection, ensuring consistent coolant delivery to cutting edges.
Implementation Method 1
the cooling channels being arranged essentially along the longitudinal axis of the high-performance reamer, the cooling channels being decentralized, with two cooling channels each forming an angle with a center point of the high-performance reamer
Implementation Method 2
A deflection, here about 90°, results in a separation of the air/oil mixture when the cutting tool's cutting edges are lubricated with minimum quantity lubrication
Data Source
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Figure 3~5
AI summary
The description shows a chip breaker system for a drilling, turning, milling or reaming tool, wherein the chip breaker system comprises: a portion of a flute (1004) and a first area (1002) which is produced by a progressive cut, wherein a first edge (1003) is arranged between the portion and the first area (1002) in such a way that chips produced by a cutting movement of the drilling, turning, milling or reaming tool can be broken at the first edge (1003). The application further relates to a high-speed reamer comprising such a chip breaker system, a reamer made of solid carbide, a reamer with axially extending cooling channels which are disposed in a decentralized manner (figures 1 and 9), a reamer with cooling channels which are unevenly distributed in the peripheral direction (figure 9), and a reamer with cooling channels, wherein the outlet openings of the cooling channels are arranged on different cutting planes (figure 14).