Cam-Indexed Cutting Insert Without Motorized Indexing

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Solution Overview

Problem

Existing cutting systems with motorized indexing mechanisms are costly and lead to increased downtime due to complexity and potential repair issues.

Innovation Solution

A cutting system utilizing a cam-connected cutting insert and a purely mechanical stationary fixture with moveable indexing pins, allowing for automatic indexing of the cutting insert without the need for motorized components, where the cam is rotated by the moveable indexing pins as the tool is moved relative to the stationary fixture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If motorized indexing systems are used, then indexing automation is improved, but device complexity and cost increase

Engineering Contradiction:

Improveindexing automationVSAvoidsystem complexity

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The patent replaces motorized indexing systems with a purely mechanical cam-based indexing mechanism. The cam profile is designed to automatically guide the indexing pin through a rotation path that indexes the cutting insert, eliminating motors, sensors, and control electronics while maintaining automated indexing functionality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The cam mechanism is designed to self-index the cutting insert through its geometric profile. As the tool moves through its operational cycle, the cam automatically engages with the indexing pin and rotates the cutting insert to the next position without requiring external actuation or control systems

Inventive Principle:

Principle #25Self-service

2Extent of automation

If motorized indexing systems are used, then indexing automation is improved, but repair costs and downtime increase

Engineering Contradiction:

Improveindexing automationVSAvoidsystem reliability

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The patent employs simple, inexpensive mechanical components (cam, indexing pin, fixture) that can be easily replaced if worn or damaged. These components have no electronic circuits or motors that could fail, making them highly reliable and低成本 to maintain compared to motorized systems

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

By eliminating motors, sensors, and control electronics, the system removes all electronic failure points. The purely mechanical cam-based indexing mechanism has fewer moving parts and no electronic components that could malfunction, significantly improving reliability and reducing downtime

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If complex motorized systems are used, then indexing precision is improved, but manufacturing cost increases

Engineering Contradiction:

Improveindexing precisionVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The indexing precision is achieved through the cam profile geometry rather than complex mechanisms. The cam is designed with precise angular segments that correspond to the cutting insert positions, providing accurate indexing through simple rotational movement driven by the cam's geometric shape

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces complex motorized positioning systems with a cam mechanism where precision is built into the cam profile itself. This single cam component provides all the positioning information needed, eliminating the need for motors, encoders, and control systems while maintaining indexing precision

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This solution reduces manufacturing and repair costs while minimizing downtime by using a purely mechanical system for indexing, enhancing the efficiency and reliability of the cutting system.

Implementation Method 1

The cam of the tool may be configured to be moved into contact with the moveable indexing pin of the stationary fixture, and the moveable indexing pin of the stationary fixture may be configured to cause the cam to rotate thereby indexing the cutting insert

Methodology Applied

Scientific EffectMechanical contact and force transmission: Mechanical Force

Data Source

PatentUS20240300029A1Automatic indexing for cutting insert

Publication Date: 2024.09.12 KENNAMETAL INC

AI summary

A cutting system may include a tool and a stationary fixture. The tool may include a cam connected with a cutting insert. The stationary fixture may be spaced apart from the tool. The stationary fixture may include a moveable indexing pin moveable relative to the stationary fixture. The cam of the tool may be configured to be moved into contact with the moveable indexing pin of the stationary fixture, and the moveable indexing pin of the stationary fixture may be configured to cause the cam to rotate thereby indexing the cutting insert.