Cutting Insert Anti-Slip Clamp for Precise Milling Positioning
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Solution Overview
Problem
Existing milling tool assemblies face challenges in maintaining the precise position of cutting inserts during cutting operations due to high forces, which can cause displacement or orientation changes, especially in high-speed rotating tools and lateral cutting operations.
Innovation Solution
A milling tool assembly with an anti-slip arrangement featuring non-parallel abutment surfaces adjacent to the base surfaces of both the cutting insert and the tool, where the clamp biases the tool actuator surface against the insert actuator surface, preventing slippage by engaging the insert abutment surfaces with the tool abutment surfaces, thus maintaining the cutting insert's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutting insert is mounted on a tool base surface, then the cutting insert can be positioned for cutting operations, but high cutting forces can cause displacement or orientation changes of the cutting insert
Solution Approach 1:
The invention transitions from a single-plane abutment arrangement to a three-dimensional non-parallel abutment surface configuration. The first and second abutment surfaces on both the tool and insert are arranged at different angles and positions, creating a multi-dimensional constraint system that prevents both translational and rotational displacement of the cutting insert under cutting forces.
Solution Approach 2:
The invention employs asymmetric, non-parallel abutment surfaces instead of symmetric or parallel surfaces. The first abutment surface on the tool is non-parallel to the second abutment surface, and similarly for the insert surfaces. This asymmetric configuration creates directional constraints that effectively resist cutting forces from multiple directions, preventing both slippage and orientation changes.
2Manufacturing precision
If non-parallel abutment surfaces are used to prevent slippage, then positioning precision is improved, but the design of the upper portion of the cutting insert becomes restricted
Solution Approach 1:
The invention divides the cutting insert into functionally independent segments: the lower portion containing the abutment surfaces and base surface that interface with the tool, and the upper portion that performs the cutting function. This segmentation allows the upper portion to be designed independently for different cutting applications while the lower portion maintains the standardized non-parallel abutment configuration for precise positioning.
Solution Approach 2:
The non-parallel abutment surface configuration serves as a universal interface that can accommodate multiple types of cutting inserts with different upper portion designs. The standardized abutment geometry on the base surface enables the same tool holder to securely mount various insert types (indexable or non-indexable, different shapes, different sizes) while maintaining precise positioning for all of them.
3Device complexity
If friction lock is used to hold the cutting insert, then the structure is simple, but it is insufficient to withstand centrifugal forces during high-speed rotation
Solution Approach 1:
The invention replaces the simple flat friction-based interface with a three-dimensional configuration featuring non-parallel abutment surfaces that create mechanical interlocking. The angled surfaces generate normal forces and friction components in multiple directions, creating a more reliable retention system that can withstand centrifugal forces during high-speed rotation while maintaining relatively simple overall structure.
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 configuration effectively prevents both visible and non-visible slippage of the cutting insert along the tool base surface, ensuring precise positioning and stability during cutting operations, even under high forces, particularly beneficial for high-speed rotating tools and lateral cutting operations.
Implementation Method 1
the clamp is configured to bias the tool actuator surface against the insert actuator surface which consequently biases the first and second insert abutment surfaces against the first and second tool abutment surfaces for preventing slippage of the cutting insert along the tool base surface
Data Source
Figure 1A~1C
Figure 1D~2
Figure 3A~3C
AI summary
A cutting tool (12) and a cutting insert (14), each of which including a base surface (18, 34) and an anti-slip arrangement (24, 40) adjacent thereto. Each anti-slip arrangement (24, 40) includes an actuator surface (30, 44) and non- parallel first (26A, 42A) and second (26B, 42B) abutment surfaces, and the actuator surface (30) of the cutting tool (12) is a surface of a clamp (28) of the cutting tool (12). The cutting insert (14) is mounted on the cutting tool (12) via engagement of the base surfaces (18, 34) thereof and the clamp (28) is operable to bias the actuator surfaces (30, 44) against each other and thereby force the first (26A, 42A) and second (26B, 42B) abutment surfaces against each other, for preventing slippage of the cutting insert (14) along the tool's base surface (18).