Cutting Insert Side-Face Geometry for Corner Edge Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cutting inserts for rotary cutting tools face challenges in sufficiently suppressing damage to the corner cutting edge during high feed processing, as existing designs either inadequately address the strength of corner cutting edges or fail to provide effective solutions for damage prevention.
Innovation Solution
A cutting insert with an approximately polygonal shape featuring a main cutting edge and corner cutting edge, where the first side face portion has a negative clearance angle and increases in height towards the corner cutting edge, and the second side face portion has a greater height than the first side face portion, both with negative clearance angles, enhancing the durability of the corner cutting edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the first corner side face portion has an obtuse angle and the second corner side face portion has an acute angle to increase corner side face portion capacity, then the strength of the cutting edge is improved, but the height of the first corner side face portion becomes highest at the main cutting edge side and decreases towards the corner cutting edge, making it difficult to sufficiently suppress damage to the corner cutting edge
Solution Approach 1:
The patent applies local quality by giving different height characteristics to different side face portions. Specifically, the first corner side face portion is designed to have increasing height towards the corner cutting edge, while the second corner side face portion has a different height profile. This localized differentiation ensures that the corner cutting edge region receives enhanced structural support precisely where needed, rather than uniformly across the entire cutting insert.
Solution Approach 2:
The patent introduces a new dimensional approach by configuring the side face portions to have varying heights in the vertical dimension. The first corner side face portion increases in height towards the corner cutting edge, creating a stepped or tapered structure that adds structural reinforcement in the height dimension. This dimensional change provides additional support to the corner cutting edge without altering the horizontal geometry.
2Productivity
If high feed processing is performed to improve processing efficiency, then productivity is improved, but the processing cutting load on the cutting edge increases and damage such as broken edge more easily occurs
Solution Approach 1:
The patent applies beforehand cushioning by pre-reinforcing the corner cutting edge with the specifically configured first and second corner side face portions. The first corner side face portion increases in height towards the corner cutting edge, and the second corner side face portion has a greater height than the first, creating a protective structural buffer. This pre-established structural reinforcement cushions the corner cutting edge against the increased loads encountered during high feed processing, preventing damage before it occurs.
Data Source
AI summary
Provided is a cutting insert that can suppress damage of a corner cutting edge. The cutting insert has an approximately polygonal shape, and is constituted of a main cutting edge and a corner cutting edge connected to the main cutting edge. The cutting insert includes: a first side face portion that is connected to the main cutting edge, has a negative clearance angle, and is formed such that height thereof increases gradually in a direction of approaching the corner cutting edge; and a second side face portion that is connected to the corner cutting edge, has a negative clearance angle, and has height that is greater than the first side face portion.