Adjustable Cartridge Wedge for Cutting Tool
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Solution Overview
Problem
Conventional adjustable cartridges for cutting tools require a lockdown screw for vertical adjustment, which can cause inaccuracies due to movement of the cartridge after adjustment.
Innovation Solution
A wedge with a shallow taper angle and a spring are used to provide precise vertical adjustment of the cutting insert, eliminating the need for a lockdown screw by exerting an opposing force and allowing fine adjustments through a threaded fastener.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lockdown screw is used for vertical adjustment of the cutting insert, then the adjustment mechanism is simple and easy to operate, but the cartridge may move after adjustment, decreasing the accuracy of the vertical position adjustment
Solution Approach 1:
The invention removes the lockdown screw from the adjustment mechanism. Instead of using a separate locking component, the wedge itself provides both adjustment and locking functions through its geometric shape and interaction with the cartridge and spring, eliminating the source of inaccuracy while maintaining operational simplicity
Solution Approach 2:
The invention combines the adjustment and locking functions into a single integrated mechanism. The wedge's movement simultaneously adjusts the cutting insert position and engages with the spring to provide automatic locking, merging two separate functions into one unified component that eliminates the accuracy problems associated with separate lockdown screws
2Manufacturing precision
If a wedge with shallow taper angle is used for vertical adjustment, then fine and precise adjustment is achieved, but the mechanism becomes more complex
Solution Approach 1:
The invention uses a wedge with a specifically optimized shallow taper angle parameter. This parameter change enables fine adjustment precision while the overall mechanism remains relatively simple because the wedge geometry itself provides the adjustment function without requiring additional complex components
Solution Approach 2:
The wedge mechanism is designed to be self-locking through its interaction with the spring and cartridge. The spring automatically provides the opposing force needed to maintain the wedge in its adjusted position, eliminating the need for additional locking mechanisms or complex control systems
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 enables precise and accurate vertical adjustment of the cutting insert without the inaccuracies associated with lockdown screws, enhancing the precision and stability of the cutting tool.
Implementation Method 1
a spring exerting an opposing force
Implementation Method 2
a wedge with a very shallow taper angle that cooperates with a cartridge
Implementation Method 3
Rotation of a threaded fastener disposed within the wedge causes the wedge to move
Data Source
AI summary
A cutting tool includes a cartridge-receiving pocket, and an adjustable cartridge assembly mounted in the cartridge-receiving pocket. The adjustable cartridge assembly includes a cartridge with an insert-receiving pocket and a wedge. The wedge has planar surfaces formed at taper angles of between greater than zero degrees and less than or equal to about five degrees that contact the bottom wall of the cartridge to move a cutting insert mounted in the insert-receiving pocket of the cartridge in a direction of a central axis of the cutting tool. The planar surfaces are at different distances from a central axis of the wedge to place the wedge in a minus, nominal or plus orientation, respectively.