Rotary Cutting Tool Axial Insert Adjustment by Elastic Flexing
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Solution Overview
Problem
Rotary cutting tools lack an effective adjustment mechanism for precisely controlling the axial position of cutting inserts, which limits the ability to adjust the effective cutting width and flexibility in cutting operations.
Innovation Solution
A rotary cutting tool with an adjustable cutting portion that includes a resilience recess and a lever-based adjustment arrangement, allowing the cutting portion to be pivoted between non-flexed and flexed positions, enabling precise axial adjustment of cutting inserts through a screw-driven mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If no adjustment mechanism is provided, then the structure remains simple, but the ability to adjust axial position of cutting inserts is lost
Solution Approach 1:
The cutting portion is designed to be dynamically adjustable between a non-flexed position (where the body rearward surface defines a body plane perpendicular to the tool longitudinal axis) and a flexed position (where the biasing portion extends further axially forward than the body plane). This dynamic capability allows the system to adapt axial position without requiring completely different tool designs.
Solution Approach 2:
The adjustment mechanism changes the axial position parameter of the cutting portion by utilizing elastic deformation. The resilience recess allows the body material to flex elastically when the biasing member applies force, thereby changing the axial position of the cutting inserts in a controlled manner.
2Adaptability or versatility
If a rigid adjustment mechanism is used, then positioning is precise, but flexibility and adaptability are reduced
Solution Approach 1:
The cutting portion incorporates a resilience recess that enables elastic flexibility. This flexible region allows the cutting portion to bend and adapt to different positions while maintaining controlled precision through the biasing member's mechanical action. The flexibility is localized to the body material itself rather than requiring separate flexible components.
Solution Approach 2:
The biasing member acts as an intermediary between the lever mechanism and the cutting portion. It translates the lever's pivoting motion into controlled elastic deformation of the cutting portion, mediating between the rigid lever structure and the flexible cutting portion to achieve both precision and adaptability.
3Manufacturing precision
If manual adjustment is used, then operation is simple, but adjustment precision and control are insufficient
Solution Approach 1:
The manual adjustment process is enhanced by replacing direct hand manipulation with a mechanical lever system. The lever provides mechanical advantage, allowing the operator to achieve precise axial position adjustment with minimal effort. The screw-driven mechanism further refines the adjustment precision while maintaining ease of operation through simple rotational motion.
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 allows for accurate control of the cutting width and flexibility in cutting operations, enhancing the tool's adaptability and precision in slotting and other metal cutting applications.
Implementation Method 1
a resilient body portion at a forward end of the tool holder; a biasing member mounted on the tool holder and engaging the resilient body portion to bias the resilient body portion in a first direction along the tool longitudinal axis; a lever pivotally mounted on the tool holder and configured to adjust an axial position of the at least one cutting insert mounted on the tool body
Data Source
Figure 1~2
Figure 3~4
Figure 5~5a
AI summary
A rotary cutting tool includes a tool holder and a tool body releasably attached thereto. The tool body has a cutting portion that includes a peripheral insert pocket, for retaining a cutting insert. The tool holder includes an adjustment arrangement that includes a biasing member, movably attached to the tool holder, having a biasing portion. The cutting portion is adjustable between a non-flexed position and a flexed position. In the flexed position, the cutting portion is elastically deformed in a forward direction due to biasing engagement with the biasing portion, thereby adjusting the axial position of the insert pocket and thus the cutting insert.