Lever-Lock Cutting Insert Clamping for Higher Holding Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional indexable cutting tools face issues with insufficient clamping force, particularly when using a lever-based system, and require separate cutting inserts for lever and screw-based systems, leading to increased management costs and inefficiencies.
Innovation Solution
The indexable cutting tool design features a lever with a defined fulcrum and pressing point configuration that allows for efficient force transmission to the cutting insert, using a screw to incline the lever and apply force close to its end, enhancing clamping force and adaptability to both lever and screw-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional L-shaped lever is used for clamping the cutting insert, then the cutting insert can be easily replaced, but the lever deforms under high cutting resistance leading to insufficient clamping force
Solution Approach 1:
The patent changes the geometric parameters of the lever, specifically the distance between the fulcrum and the pressing point, to optimize the lever ratio. This allows the lever to generate sufficient clamping force without deforming under high cutting resistance, while maintaining ease of replacement operation.
Solution Approach 2:
The patent introduces a new dimension to the lever design by adding a pressing point on the lever body that is positioned at an optimized distance from the fulcrum. This creates an additional force application point that enhances the clamping force generation capability while preserving the lever's ease of operation.
2Reliability
If different cutting inserts are prepared for lever-based and screw-based systems, then each system can be optimized for its specific clamping mechanism, but management costs increase due to having multiple insert types
Solution Approach 1:
The patent designs the cutting insert with a universal through-hole structure that can accommodate both lever-based and screw-based clamping mechanisms. The through-hole is positioned and dimensioned such that it works effectively with either clamping system, allowing a single insert design to serve multiple functions and reducing management complexity.
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 design achieves a greater clamping force and reduces the likelihood of lever deformation, allowing for reliable clamping of cutting inserts with acute corners and enabling the same cutting insert to be used for both lever and screw-based systems, thereby reducing management costs and improving processing stability.
Implementation Method 1
the lever (3) is inclined around the fulcrum on the lever (3) in a manner that the one end (31) which applies a clamping force moves forward in a pressing direction
Implementation Method 2
a screw (4) that presses the lever (3) to be inclined
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is an indexable cutting tool of a lever-lock type applying a greater clamping force than conventional cutting tools. At a bottom of an insert fixing portion (11), there is formed a pillar-shaped lever (3) in a state in which one end (31) protrudes from a placement surface (12) of the insert fixing portion (11). A screw (4) applies a pressing force to the lever (3) between the one end (31) and a portion (32b3) such that the lever (3) is pressed and inclined with the portion (32b3) as a fulcrum in the middle of the lever (3) so that the one end (31) applies a clamping force to the cutting insert (2) .