Cutting Insert Internal Cooling for Rake Face Thermal Wear
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Solution Overview
Problem
The region near the tip of a cutting edge, where the temperature is highest, is difficult to cool efficiently due to the coolant not reaching the rake face, leading to thermal wear.
Innovation Solution
A cutting insert with an internal cooling path and supply hole to direct cooling fluid to the rake face, including an introduction flow path and cooling flow paths that extend parallel to the rake face to effectively cool the region near the cutting edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooling fluid is supplied to the cutting edge region, then thermal wear is reduced, but the cooling fluid cannot reach the rake face where temperature is highest
Solution Approach 1:
The cutting insert material serves as an intermediary heat transfer medium, conducting cooling fluid through its internal structure to reach the rake face region, thereby indirectly protecting the cutting edge while directly cooling the previously overheated rake face area
Solution Approach 2:
The cooling path is pre-formed within the cutting insert structure before the cutting operation begins, allowing coolant to be delivered in advance to the critical rake face region, preventing thermal wear before it occurs rather than attempting to cool after heating
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 internal cooling path efficiently cools the rake face near the cutting edge, reducing thermal wear by maintaining the temperature below critical levels, even in high-strength super-hard alloy inserts.
Implementation Method 1
an internal cooling path through which fluid for cooling the rake face flows
Data Source
AI summary
A structure for cooling a rake face of a cutting insert in a region near a tip of a cutting edge. The cutting insert includes a rake face, a cutting edge formed on an outer periphery of the rake face, a base portion that supports the rake face, and an internal cooling path through which fluid for cooling the rake face flows. The internal cooling path includes an introduction flow path and a cooling flow path, and the cooling flow path is disposed behind a region in which a chip of a workpiece comes into contact with rake face. The cooling flow path is provided at a depth of less than or equal to 1.5 mm from the rake face.