Resilient Clamping Jaw Structure for Insert Stability and Chip Flow

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Solution Overview

Problem

Existing cutting tools for grooving/parting/slitting operations face challenges in efficiently securing cutting inserts due to the need for flexible upper jaws that compromise chip evacuation paths and stability during cutting operations.

Innovation Solution

A tool body design featuring a resilient clamping mechanism with a flexible overhanging clamping portion and a fixed clamping portion connected by a hinge, allowing for secure insertion and retention of cutting inserts using a keyhole mechanism, while maintaining optimal chip evacuation paths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a flexible upper jaw is used to secure cutting inserts, then the clamping reliability is improved, but the chip evacuation path is obstructed and operational stability deteriorates

Engineering Contradiction:
Improveclamping reliabilityVSAvoidchip evacuation obstruction
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The clamping mechanism is segmented into a fixed jaw and a movable jaw that can independently close onto the cutting insert. The movable jaw is actuated by a cam mechanism that applies clamping force only when needed, while the fixed jaw maintains a stable structure that does not obstruct chip evacuation. This segmentation allows the system to achieve reliable clamping without requiring the entire upper jaw structure to be flexible.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The clamping system transitions from a static flexible jaw design to a dynamic system where the movable jaw can be actuated into a clamping position and then held firmly by the cam mechanism. The cam provides mechanical advantage to maintain constant clamping pressure on the cutting insert, achieving reliable clamping through dynamic actuation rather than structural flexibility.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If a resilient clamping mechanism is implemented, then ease of operation for insert insertion and removal is improved, but device complexity increases

Engineering Contradiction:
Improveinsert insertion and removal easeVSAvoidclamping mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The cam mechanism is designed to automatically maintain constant clamping pressure on the cutting insert once activated. The cam's geometric profile provides self-regulating mechanical advantage that ensures consistent clamping force without requiring additional control systems or complex actuation mechanisms. This self-service特性 simplifies the overall system while maintaining ease of operation.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The cam mechanism acts as an intermediary between the actuation force and the clamping jaws. It translates simple actuation motion into effective clamping pressure, mediating the interaction between the operator and the clamping system. This intermediary mechanism provides mechanical advantage and maintains constant pressure, simplifying the operation while avoiding the need for complex resilient materials or spring systems.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 design ensures stable and efficient clamping of cutting inserts, enhancing operational stability and facilitating easy insertion and removal, while maintaining unobstructed chip evacuation channels.

Implementation Method 1

the flexible overhanging clamping portion is resiliently displaceable about the hinge clamping portion towards the fixed clamping portion

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250262677A1Tool body having clamping jaw with resilient clamping portion and cutting tool
Publication Date: 2025.08.21 ISCAR LTD
  • US20250262677A1 patent drawing
  • US20250262677A1 patent drawing
  • US20250262677A1 patent drawing

AI summary

A tool body has base and clamping jaws which are spaced apart by a clamping recess. The clamping jaw is resiliently movable with respect to the base jaw. The clamping recess includes an insert receiving pocket and a clamping flexibility recess extending from the insert receiving pocket. The clamping jaw includes a flexible overhanging clamping portion, and a fixed clamping portion connected by a hinge clamping portion, the flexible overhanging clamping portion being delimited by the insert receiving pocket and a clamping flexibility recess. The clamping recess comprises an innermost clamping recess point which is located at the clamping flexibility recess.