Cutting Tool Insert Retention via Centrifugal Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting tools face issues with cutting inserts being thrown off due to centrifugal force and having insufficient clamping, leading to reduced durability and efficiency.
Innovation Solution
A cutting tool design featuring an elongated holder with insert pockets that include a first portion radially inward of the outer peripheral opening, allowing the cutting inserts to be securely fastened without V-notches, thereby enhancing durability and preventing throw-off under centrifugal force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If V-notches are made large to accommodate clamp screws, then the cutting inserts can be fastened more securely, but the durability decreases due to structural weakness
Solution Approach 1:
The invention extracts and eliminates the V-notch structure from the holder design. Instead of using V-notches to accommodate clamp screws, the cutting inserts are retained solely by centrifugal force during rotation, removing the problematic V-notch feature that caused the contradiction between clamping strength and durability.
Solution Approach 2:
The cutting inserts utilize the centrifugal force generated during tool rotation to secure themselves in position without requiring additional clamping structures. The rotational motion itself provides the retaining force, eliminating the need for V-notches and clamp screws that compromised durability.
2Reliability
If V-notches are made small to maintain structural integrity, then durability improves, but the cutting inserts cannot be fastened securely
Solution Approach 1:
The V-notch structure is completely removed from the design. The holder features smooth insert pockets without V-shaped grooves, eliminating the constraint that forced a compromise between durability and clamping capability.
Solution Approach 2:
The invention changes the operational parameters by utilizing centrifugal force generated during rotation as the retaining mechanism. This parameter change (from static mechanical interlocking to dynamic centrifugal retention) allows both high durability and secure insert retention to coexist.
3Strength
If traditional clamp screw fastening is used, then cutting inserts can be securely attached, but the tool structure becomes more complex and insert capacity is reduced
Solution Approach 1:
The invention extracts and removes the clamp screw fastening system from the tool design. The simpler insert pockets without V-notches eliminate the need for clamp screws, reducing structural complexity while maintaining secure attachment through centrifugal force.
Solution Approach 2:
The rotational motion of the tool serves multiple functions: both cutting material and retaining the cutting inserts through centrifugal force. This multi-functionality eliminates the need for separate clamping mechanisms, reducing complexity and increasing insert capacity.
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 effectively secures cutting inserts, improving durability and cutting efficiency by reducing the likelihood of inserts being thrown off during high-speed rotation, and allows for a more compact tool structure with increased insert capacity.
Implementation Method 1
To prevent the cutting inserts from being thrown off under a centrifugal force
Data Source
AI summary
In an embodiment, a cutting tool includes a holder and a cutting insert. The holder is elongated, extends from a first end to a second end along a rotational axis. The holder includes an insert pocket on a side of the first end. The cutting insert is located in the insert pocket and includes a cutting edge. The insert pocket includes an opening in an end surface of the first end and an outer peripheral surface adjacent to the first end of the holder. The cutting insert further includes a first portion that is located more radially inward than an outer peripheral opening of in the insert pocket in a front view of the first end of the holder. The first portion has a width greater than a width of the opening in a direction along a rotation direction of the rotation axis.