Coolant-Fed Cutting Insert Geometry for Chip Breaking
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Solution Overview
Problem
Existing cutting tools face challenges in achieving optimal chip breakage and coolant supply, leading to reduced service life and surface quality issues during machining.
Innovation Solution
A monolithic cutting insert design with a clamping section, cutting head, and cantilever arm, featuring a chip-breaking geometry that covers the coolant channel, ensuring direct coolant impact and improved chip formation properties, along with a positive rake angle and secondary cutting edge for enhanced chip breaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coolant channel is positioned to supply coolant to the cutting edge, then coolant supply is improved, but chip breaking properties deteriorate due to coolant spraying over the cutting body
Solution Approach 1:
The coolant channel is positioned to deliver coolant specifically to the chip-breaking geometry area rather than uniformly to the cutting edge. This localized coolant application ensures that coolant reaches the chip formation zone where it is most needed for chip breaking, while avoiding unnecessary coolant spray over the cutting body that would harm chip breaking properties.
2Reliability
If the coolant channel is uncovered to allow free coolant flow, then coolant distribution is improved, but chip breaking properties deteriorate due to coolant collision with cutting head
Solution Approach 1:
The chip-breaking geometry serves as an intermediary element that the coolant must pass through or around. By positioning the coolant channel so that coolant flows through or alongside the chip-breaking geometry, the design ensures that coolant reaches the critical chip formation zone while using the geometry itself to guide and concentrate the coolant flow, preventing harmful spray patterns.
3Ease of manufacture
If the cutting insert design is simplified, then manufacturing ease is improved, but chip breaking and coolant supply performance deteriorate
Solution Approach 1:
The cutting insert integrates multiple functions into a unified structure: the clamping section, cutting head, and chip-breaking geometry are formed as a single monolithic component. The coolant channel is positioned to serve dual purposes - supplying coolant to the chip formation zone while also defining the chip-breaking geometry location. This merging of functions achieves complex performance requirements through a relatively simple integrated design.
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 significantly improves chip breaking and coolant distribution, extending the service life of cutting inserts and enhancing the quality of machined surfaces by ensuring effective coolant reach and retention of kinetic energy.
Implementation Method 1
a clamping section (12) having at least one coolant channel (34) configured as a through-hole
Data Source
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AI summary
The present invention relates to a cutting insert (10) for a tool (100) for machining a workpiece. The cutting insert (10) has a clamping section (12) which has at least one coolant channel (34) designed as a through hole. Furthermore, the cutting insert (10) has a cutting head (14) with at least one cutting body (24) having a main cutting edge (26), a chip face (30) adjacent to the main cutting edge (26), and a chip-breaking geometry (32) which protrudes from or is introduced into the chip face (30) and is configured to break a chip lifted by the main cutting edge (26). The cutting insert (10) further has a cantilever arm (16) connecting the clamping section (12) to the cutting head (14) and having a smaller diameter than the clamping section (12). A portion of the cutting head (14) having the chip-breaking geometry (32) at least partially covers the coolant channel (34) when viewed in a top view from the front along a longitudinal axis (38) of the cutting insert (10).