Cutting Insert Holder Assembly With Spring-Loaded Indexing
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Solution Overview
Problem
Existing cutting tools face challenges in efficiently indexing and replacing cutting inserts due to complex mechanisms and potential falling parts during indexing, which can lead to operational inefficiencies.
Innovation Solution
An insert holder assembly with an ejector member and biasing member system that allows for adjustable positioning of cutting inserts, enabling easy indexing and secure clamping through a compressive force mechanism, eliminating the need for loose parts during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex indexing mechanism is used to rotate and index cutting inserts, then the cutting insert can be indexed to different positions, but the device complexity increases and loose parts may fall during indexing
Solution Approach 1:
The patent removes the complex rotation mechanism entirely, extracting the indexing function from mechanical rotation to a simple linear ejection system. The cutting insert is indexed by ejecting it from one pocket to another along a linear path, eliminating loose parts and complex mechanisms while maintaining multi-position indexing capability
Solution Approach 2:
The patent introduces an intermediary ejection system that mediates between the tool holder and cutting insert. Instead of direct mechanical rotation, a spring-loaded ejection mechanism serves as an intermediary to transfer the cutting insert between pockets, simplifying the overall system while maintaining indexing functionality
2Reliability
If a retaining screw mechanism is used to clamp the cutting insert, then the cutting insert can be securely fastened, but the ease of operation for indexing and replacing inserts is reduced
Solution Approach 1:
The patent merges the ejection function and clamping function into a single integrated mechanism. The same spring-loaded system that ejects the cutting insert for indexing also provides the clamping force to secure it in place, eliminating the need for separate retaining screws and simplifying the operation of both indexing and replacement
Solution Approach 2:
The spring-loaded clamping mechanism is self-actuating, automatically engaging and disengaging the cutting insert without requiring manual intervention for each operation. The spring force automatically secures the insert after ejection, providing reliable clamping without additional fastening steps
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
Facilitates seamless indexing and secure clamping of cutting inserts, enhancing operational efficiency and reducing the risk of parts falling, thus improving tool performance and usability.
Implementation Method 1
an elastically compressible biasing member elastically compressed between the ejector compression surface and the ejection chamber compression surface
Data Source
AI summary
A cutting insert includes at least two peripheral cutting edges. An insert holder assembly includes an insert holder which include an insert pocket and an ejector chamber connected by a through hole. The insert holder assembly includes an ejector member located at least partially in the ejection chamber, and a compressible biasing member. In an inner position, the biasing member exerts a compressive force on the ejector member. When the cutting insert is releasably attached to the insert holder by a fastening member which is connected to the ejector member, to constitute a fastened position of a cutting tool, the insert holder assembly is in the inner position and the fastening member clamps the cutting insert so that the insert lower surface abuts the pocket base surface.