Integrated Lubrication Ring for Micro-Cutting Edge Cooling
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Solution Overview
Problem
Existing cutting tools with external lubrication systems face issues such as inadequate lubrication and cooling for small tools, leading to increased cutting temperatures, reduced tool life, and poor surface finishes, while integrated lubrication systems with single ducts or peripheral channels fail to effectively direct lubricants to the cutting edges, resulting in wear and performance problems during micro-machining operations.
Innovation Solution
A cutting tool with a directional sprinkling ring and multiple lubrication ducts that extend through the tool body, allowing for optimal lubricant distribution directly to the cutting edges and increasing lubricant velocity through the Venturi effect, ensuring efficient chip removal and improved surface finishes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If external sprinkling is used to deliver lubricant to cutting edges, then the system is simple to implement, but the lubrication and cooling effectiveness is insufficient leading to increased cutting temperature
Solution Approach 1:
The patent combines the lubrication delivery system with the tool body structure itself by integrating lubrication ducts directly into the tool. This merging of the delivery mechanism with the tool structure enables precise lubricant delivery to cutting edges while maintaining system simplicity, resolving the contradiction between ease of manufacture and temperature control effectiveness.
Solution Approach 2:
The patent introduces lubrication ducts as intermediary channels that transport lubricant from the external supply to the cutting edges. These ducts act as mediators that bridge the gap between external lubrication sources and the cutting zone, enabling effective lubrication without requiring complex external sprinkling systems.
2Device complexity
If external sprinkling is used for lubrication, then the system structure is simple, but chip removal is not optimal causing cutting edges to intersect chips multiple times
Solution Approach 1:
The lubrication ducts are merged with the tool body structure, creating an integrated system that delivers lubricant directly to cutting edges. This integration enables optimal chip removal by positioning lubricant delivery precisely where needed, improving surface condition quality without increasing overall system complexity.
Solution Approach 2:
The patent applies local quality by delivering lubricant precisely to specific locations at the cutting edges through integrated ducts. This localized delivery optimizes chip removal at critical points where cutting occurs, improving surface finish quality without requiring complex system-wide changes.
3Productivity
If tools operate at high rotation speeds of 20,000 to 80,000 rpm, then productivity is improved, but external lubricant is pushed back by rotating air ring and only partially reaches cutting area
Solution Approach 1:
The lubrication ducts serve as intermediary channels that are resistant to the effects of high-speed rotation. By delivering lubricant through these protected channels directly to cutting edges, the system maintains reliable lubrication effectiveness even at rotation speeds of 20,000 to 80,000 rpm where external sprinkling fails.
Solution Approach 2:
The patent replaces the external mechanical sprinkling system with an internal duct-based delivery system. This substitution eliminates the problems caused by high-speed rotation and air rings, allowing reliable lubrication to be maintained at high productivity rotation speeds.
4Device complexity
If single lubrication duct is used in tool body, then the system is simpler than peripheral channels, but lubricant is not effectively directed to cutting edges resulting in wear problems
Solution Approach 1:
The patent applies local quality by directing lubricant through ducts to specific locations at the cutting edges. This localized delivery ensures that lubricant reaches the precise points where cutting occurs, improving cutting edge durability without requiring multiple ducts throughout the entire tool body.
Solution Approach 2:
The lubrication system is segmented into multiple ducts that are strategically positioned within the tool body. This segmentation allows lubricant to be delivered to multiple critical points at the cutting edges, improving reliability and durability while maintaining relative system simplicity.
5Ease of manufacture
If lubrication outlets are drilled orthogonal to central axis in flutes, then manufacturing is easier, but lubricant moves away from cutting edges resulting in non-optimal lubrication
Solution Approach 1:
The patent applies local quality by orienting lubrication outlets at specific angles that direct lubricant precisely toward cutting edges. This localized directional control ensures optimal lubrication effectiveness at critical points while maintaining ease of manufacture through standardized outlet configurations.
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 solution provides reliable and repetitive machining for small tools, extending their service life and enabling high-speed machining in microsystems, including materials like titanium and carbon fibers, with improved lubrication and reduced chip re-cutting and built-up edge formation.
Implementation Method 1
increasing the output speed of the lubricant
Data Source
AI summary
A cutting tool for machining mechanical parts. The cutting tool incudes a tool body with a central axis (A) and a gripping diameter. A tool head is adjacent to the tool body in the direction of the central axis (A) and includes of a sprinkling region and a cutting portion having a cutting diameter which is smaller than the gripping diameter. At least one lubrication duct extends through the tool body and opens into a sprinkling hole located in the sprinkling region. A directional sprinkling ring is provided for attachment to a ring connection region of the tool body. The ring connection region is adjacent to the sprinkling region and the directional sprinkling ring is configured in such a way that it delimits, with at least one portion of the sprinkling region, a distribution space, and the cross section of the distribution space is reduced in the direction of the cutting portion.