Square Bar-Peeling Insert Geometry for Stable Reversible Cutting

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Solution Overview

Problem

Existing bar-peeling inserts and holders lack versatility and stability, particularly for square-shaped inserts, which are not well-suited for both roughing and finishing operations due to the elongated wiper sub-edge and limited peeling sub-edges, and there is a need for a stable mounting configuration for square-shaped inserts.

Innovation Solution

A square-shaped bar-peeling insert with at least partially curved peeling sub-edges on opposing sides, providing additional peeling sub-edges for increased versatility, and a corresponding insert-holder design with unique pocket configurations to accommodate the square shape, allowing the insert to be used in both left and right holders and enabling reversible operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a square-shaped bar-peeling insert is used, then versatility for both roughing and finishing operations is improved, but stability and mounting reliability deteriorate due to lack of suitable holder configurations

Engineering Contradiction:

Improveversatility for roughing and finishing operationsVSAvoidmounting stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The square-shaped insert is designed with multiple peeling sub-edges and curved geometry that enable it to perform both roughing and finishing operations. The insert can be mounted in either left or right holders with unique pocket configurations, making it a universal tool for different machining operations and orientations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The insert features at least partially curved peeling sub-edges on opposing sides, creating an asymmetric geometry that provides additional peeling sub-edges while maintaining structural integrity. This asymmetric design allows the insert to engage with different holder configurations while preserving stability.

Inventive Principle:

Principle #4Asymmetry

2Adaptability or versatility

If additional peeling sub-edges are added to the insert, then versatility is improved, but the length of wiper sub-edge is reduced

Engineering Contradiction:

Improvenumber of peeling sub-edgesVSAvoidwiper sub-edge length

Core Design Contradiction:

Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The cutting edge of the insert is segmented into multiple functional sub-edges including peeling sub-edges and wiper sub-edges. By dividing the cutting edge into distinct segments with different functions, the insert can provide multiple peeling sub-edges while maintaining adequate wiper sub-edge length for surface finishing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the cutting edge are given different qualities and functions. The peeling sub-edges are designed with curved geometry for material removal, while the wiper sub-edges are positioned to provide surface finishing. This local differentiation allows the insert to perform multiple functions without compromising the length or effectiveness of the wiper sub-edge.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11833593B2Square-shaped insert for bar-peeling and insert-holder tool for same

Publication Date: 2023.12.05 ISCAR LTD

AI summary

A square-shaped bar-peeling insert and insert-holder designed with pockets to hold two such square-shaped inserts. Each insert has four peripheral sub-surfaces and corners. Between each adjacent pair of corners is a cutting edge which includes a straight wiper sub-edge and two at least partially curved peeling sub-edges respectively located on opposing sides of the wiper sub-edge. The corners of the insert are inwardly disposed relative to an imaginary square formed by the sub-edges.