Resilient Inner Insert Pocket for Screwless Chamfering Retention

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Solution Overview

Problem

Existing cutting tools require additional clamping devices to securely retain chamfering cutting inserts, which complicates the design and increases manufacturing costs, while also limiting the tool's ability to perform dual cutting operations efficiently.

Innovation Solution

A tool body with an interiorly disposed inner insert receiving pocket and a resilient clamping member that can resiliently retain a chamfering cutting insert without the need for an additional clamping device, allowing for a single-piece unitary construction and reduced material usage, enabling both parting and chamfering operations in a single cutting movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a retaining screw is used to clamp the chamfering cutting insert, then the cutting insert is securely retained, but the device complexity increases due to the need for additional separate clamping devices

Engineering Contradiction:

Improveretention securityVSAvoidclamping device complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The clamping function is merged with the tool body structure itself. The pocket wall is designed with resilient properties and directly forms the clamping surface, eliminating the need for separate clamping devices like retaining screws. This integration maintains secure retention while simplifying the overall device structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pocket wall serves dual functions: it provides the structural containment for the cutting insert and simultaneously acts as the resilient clamping element. The pocket wall's inherent elasticity enables it to automatically clamp the insert without requiring external actuation or additional components.

Inventive Principle:

Principle #25Self-service

2Reliability

If additional separate clamping devices are used, then the cutting insert is securely retained, but the manufacturing cost increases

Engineering Contradiction:

Improveretention securityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If a resilient clamping member is used, then the device complexity is reduced, but the clamping force may be insufficient compared to mechanical fasteners

Engineering Contradiction:

Improveclamping device complexityVSAvoidclamping force

Core Design Contradiction:

Device complexityVSForce

Solution Approach 1:

The pocket wall is designed with specific resilient parameters including controlled elasticity, thickness, and geometric configuration. These parameters are optimized to generate sufficient clamping force through elastic deformation when the cutting insert is inserted, matching or exceeding the force provided by traditional mechanical fasteners.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The pocket wall incorporates curved or tapered surfaces that concentrate the elastic deformation and clamping force at critical contact points with the cutting insert. This geometric design enhances the effective clamping force generated by the resilient material.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 solution allows for secure retention of chamfering cutting inserts without additional clamping devices, simplifying the tool design, reducing manufacturing costs, and enabling efficient dual cutting operations by utilizing a resilient clamping member integrated with the tool body, enhancing the tool's functionality and operational efficiency.

Implementation Method 1

an interiorly disposed inner insert receiving pocket comprising a resilient clamping member configured to resiliently retain a chamfering cutting insert therein

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP3582919B1Tool body having an inner insert receiving pocket with resilient clamping member, cutting tool and chamfering cutting insert therefor

Publication Date: 2022.11.09 ISCAR LTD

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AI summary

A cutting tool (20) includes a tool body (24) having a peripherally disposed outer insert receiving pocket (58) and an interiorly disposed inner insert receiving pocket (46) with a cutting insert (22) resiliently clamped therein. The tool body (24) includes a through recess (30) at least partially circumferentially bounded by a recess circumferential surface (32). A resilient clamping member (36) extends into the through recess (30). The inner insert receiving pocket (58) is formed by the resilient clamping member (36) and a recess pocket portion (34) of the recess circumferential surface (32). A chamfering cutting insert (22) may be retained by the resilient clamping member (36), without the use of an additional, separate clamping device.