Cutting Insert Coolant Ducts for Uniform Lip Cooling
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Solution Overview
Problem
Conventional cutting tools experience high wear and reduced service life due to uneven cooling, as the coolant stream primarily targets only the portion of the cutting insert directly impacted, leading to inefficient heat dissipation and increased tool degradation.
Innovation Solution
A cutting insert with coolant ducts formed on the top side, extending partially towards the main lip and secondary lips, allowing for targeted coolant distribution and easier assembly, combined with chip breakers that serve both coolant conduction and chip-breaking functions, enhancing cooling efficiency and reducing production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is directed through nozzles or ducts in the tool holder to the main lip, then the main lip is cooled, but only the portion directly impacted by the coolant stream is cooled effectively
Solution Approach 1:
The single coolant stream is segmented into multiple coolant ducts (first, second, third coolant ducts) that distribute coolant to different lips separately, ensuring each lip receives adequate cooling independently
Solution Approach 2:
Different lips of the cutting insert are provided with different cooling qualities - the first lip receives coolant through the first coolant duct, while the second and third lips receive coolant through the second and third coolant ducts respectively, matching the cooling need to each specific location
2Temperature
If coolant ducts are formed on the inside of the cutting insert, then cooling can be achieved, but assembly requires tedious alignment of openings in the cutting insert and tool holder
Solution Approach 1:
Instead of forming coolant ducts on the inside (bottom side) of the cutting insert as conventionally done, the patent inverts the approach by forming the coolant ducts on the outside (top side) of the cutting insert, which eliminates the need for precise alignment between the cutting insert and tool holder during assembly
3Temperature
If coolant ducts are formed on the inside of the cutting insert, then cooling is provided, but production becomes considerably more difficult
Solution Approach 1:
The patent inverts the conventional approach by forming coolant ducts on the outside (top side) of the cutting insert rather than on the inside, which significantly simplifies the manufacturing process while maintaining the cooling function
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 results in reduced wear and extended service life of cutting inserts by ensuring comprehensive cooling of all lips, improving chip formation, and simplifying assembly and production processes.
Implementation Method 1
the stream of coolant which emerges from a nozzle or opening in the tool holder is guided through the coolant duct in a targeted manner toward the lip
Implementation Method 2
the cutting insert is cooled with the aid of a coolant during the machining of the workpiece
Implementation Method 3
a stream of coolant is guided to the cutting insert, in particular to the main lip of the cutting insert
Data Source
AI summary
A cutting insert having a main lip, a rake face and at least one coolant duct, which is formed on the top side of the cutting insert, is disclosed. The at least one coolant duct runs at least partially in the rake face towards the main lip and the width increases towards the main lip.