Face Grooving Insert Bottom-Angle Structure for Deep Groove Stability

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Solution Overview

Problem

Face grooving inserts require high clamping forces to prevent ejection during circular groove cutting, and existing clamping mechanisms are inefficient for deep grooves, leading to potential interference with machined groove walls.

Innovation Solution

The grooving insert is designed with a bottom surface angled relative to the cutting edge, allowing for reduced clamping force requirements and improved stability by increasing the bottom support surface area, while maintaining clearance to prevent interference with groove walls.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If horizontal mounting of face grooving insert is used, then the insert can be mounted in the insert seat, but high clamping force is required to prevent ejection during retraction

Engineering Contradiction:

Improvemounting orientationVSAvoidclamping force

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The bottom surface is designed with an asymmetric angle (10-30 degrees) relative to the cutting edge, creating an uneven support surface that reduces the required clamping force by optimizing the contact area and force distribution between the insert and insert seat

Inventive Principle:

Principle #4Asymmetry

2Length of moving object

If the distance from clamping screw to cutting edge is increased for deep grooves, then deeper grooves can be cut, but the necessary torque for clamping is increased

Engineering Contradiction:

Improvegroove depthVSAvoidclamping torque

Core Design Contradiction:

Length of moving objectVSForce

Solution Approach 1:

The bottom surface is pre-angle to provide preliminary support and stability to the insert, reducing the reliance on high clamping torque from the clamping screw to maintain insert stability during deep groove cutting operations

Inventive Principle:

Principle #10Preliminary action

3Stability of the object's composition

If bottom support surface area is increased for stability, then insert stability is improved, but risk of interference with groove walls increases

Engineering Contradiction:

Improveinsert stabilityVSAvoidinterference with groove walls

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The angle of the bottom surface is optimized within a specific range (10-30 degrees) to achieve the optimal balance between support surface area for stability and clearance from the groove walls, preventing interference while maintaining insert stability

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3231542B1A metal cutting grooving insert for face grooving

Publication Date: 2021.10.06 SANDVIK INTELLECTUAL PROPERTY AB

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AI summary

A grooving insert (1) comprising a front surface (4) and an opposite rear surface (5), a first side surface (6) and an opposite second side surface (7), a top surface (2) and an opposite bottom surface (3), the top surface (2) comprising a top front portion (9) and a top rear portion (10), the top front portion (9) comprising a cutting edge (8) arranged symmetrically relative to a first plane (P1), the bottom surface (3) is symmetrically arranged in relation to a second plane (P2), the first plane (P1) and the second plane (P2) forms an angle (α) of 0.5 - 5.0° relative to each other.