Dual-Nose Turning Tool for Deep Pocket Machining Stability
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Solution Overview
Problem
Conventional cutting tools for CNC machining face limitations in machining deep and narrow slots due to geometrical constraints, leading to increased risk of interference, vibrations, and extended downtime, particularly when using tools with significant overhangs.
Innovation Solution
A cutting tool design featuring a conical coupling portion and a ring-shaped portion with a convex nose cutting edge, allowing for alternating use of two nose portions to reduce machining time and improve accessibility, with a coolant channel to enhance wear resistance and chip control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional cutting tool with significant overhang is used for deep slot turning, then the ability to machine deep pockets is improved, but the risk of vibrations and deflection increases
Solution Approach 1:
The cutting insert is divided into two separate nose portions (first and second nose portions) with distinct cutting edges. This segmentation allows the operator to use different nose portions for different machining directions, enabling deep pocket machining while maintaining tool stability by selecting the appropriate nose portion for each operation.
Solution Approach 2:
Instead of using a single cutting edge that must accommodate all machining directions, the invention inverts the approach by providing two separate nose portions where each is optimized for specific cutting directions. The first nose portion is used for cutting in a first direction, and the second nose portion is used for cutting in a second direction, eliminating the need for excessive tool overhang and reducing vibration risk.
2Adaptability or versatility
If multiple cutting tools are used for different machining features, then the ability to machine various component features is improved, but the tool change time increases
Solution Approach 1:
The cutting insert is designed with multi-functionality by incorporating two nose portions with different cutting edges on the same tool holder. This allows a single tool to perform multiple machining operations (different cutting directions and features) without requiring tool changes, thereby maintaining adaptability while eliminating tool change time.
Solution Approach 2:
The invention merges the functionality of multiple cutting tools into a single cutting insert by providing two nose portions with different cutting edges. This combination allows the operator to machine various component features including slots, grooves, and contours using one tool, eliminating the need for frequent tool changes while maintaining versatility.
3Ease of operation
If manual indexing is used to change cutting inserts, then the process is simple to operate, but the indexing time increases
Solution Approach 1:
The cutting insert is designed to be self-servicing by incorporating two usable nose portions that can be activated without removing the insert from the tool holder. The insert automatically provides both cutting edges, and the operator simply needs to rotate the insert to activate the appropriate nose portion, eliminating the manual indexing process entirely while maintaining operational simplicity.
Data Source
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AI summary
A cutting tool (1) for turning, comprising a coupling portion (4), an intermediate portion (5) and a cutting portion (2), the intermediate portion (5) extending between the coupling portion (4) and the cutting portion (2), the intermediate portion (5) extending along a longitudinal center axis (A1) thereof, the cutting portion (2) comprising a first and a second nose portion (10, 10'), the first nose portion (10) comprising a first cutting edge (11), a second cutting edge (12), and a convex nose cutting edge (13) connecting the first and second cutting edges (11, 12), the first and second cutting edges (11, 12) forming a nose angle (α) less than 90°, a longitudinal center axis of the coupling portion (4) defines a tool rotational axis (R1), the intermediate portion (5) extending along a longitudinal center axis (A1) thereof, the cutting portion (2) comprising a top surface (7), the top surface (7) facing away from the coupling portion (4), the first and the second nose portions (10, 10') each form free ends of the cutting tool (1).