Cutting Insert Recess Structure for Chip Discharge in Ramping
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Solution Overview
Problem
Conventional cutting inserts face issues with chip discharge during cutting, leading to degraded cutting quality due to the narrow space between the inclined cutting edge and the workpiece, causing chips to be caught and collide with the workpiece surface, and the interference of clearance surfaces with the workpiece during ramping.
Innovation Solution
The cutting insert features a recess part extending from the inclined cutting edge to the coupling part along the connection part, providing a path for chip discharge and optimizing the connection part design to distribute stress on the corner cutting edge, thereby improving durability and cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the space between the inclined cutting edge and the workpiece is narrow, then the cutting insert structure is compact, but chips are caught and collide with the workpiece surface degrading cutting quality
Solution Approach 1:
The patent extracts the harmful narrow space between the inclined cutting edge and workpiece by introducing a recess part that creates a chip discharge path. This removes the problematic configuration while maintaining the compact overall structure of the cutting insert.
Solution Approach 2:
The recess part extends in the thickness direction of the cutting insert, creating a new dimensional space for chip discharge. This additional dimension allows chips to be ejected effectively without increasing the lateral footprint of the insert.
2Strength
If the clearance surface interferes with the workpiece during ramping, then the cutting insert provides structural support, but cutting quality is degraded
Solution Approach 1:
The patent applies local quality by modifying only the connection part geometry where the clearance surface exists. The recess part is strategically positioned to eliminate interference in the specific region where ramping occurs, while preserving the overall structural support function of the cutting insert.
3Device complexity
If the connection part design does not optimize stress distribution, then the structure is simple, but durability at the corner cutting edge is reduced
Solution Approach 1:
The recess part is designed in advance to preemptively address stress concentration at the corner cutting edge. By creating this geometric feature before cutting operations begin, the structure is pre-configured to distribute stresses more evenly during operation, enhancing durability without requiring complex additional components.
Data Source
AI summary
A cutting insert may include a coupling part, a cutting part, a connection part, a clamping part, and a recess part. Also, the cutting part may include a cutting body part through which the clamping part passes and a cutting edge disposed along an outer circumference of the cutting body part, and the cutting edge may include a main cutting edge provided in plurality to cut the workpiece, a corner cutting edge provided in number corresponding to that of the main cutting edge and extending curvedly from the main cutting edge, a minor cutting edge provided in number corresponding to that of the corner cutting edge and extending from the corner cutting edge to cut the workpiece, and an inclined cutting edge having one end connected to the minor cutting edge and the other end connected to the main cutting edge.