Indexable Cutting Insert Clamping for Secure Screw-Axis Indexing
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Solution Overview
Problem
Existing machining tools require complex and time-consuming processes for indexing cutting inserts, which can lead to the inserts falling out during the indexing process.
Innovation Solution
A machining tool design featuring a fastening screw with an external thread interacting with a displaceable clamping element, allowing for joint displacement without complete removal, enabling simple and secure indexing of cutting inserts by rotating them about the screw axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fastening screw is removed completely for indexing, then the cutting insert can be rotated to the next blade position, but the cutting insert may fall out during the indexing process and the operation becomes time-consuming
Solution Approach 1:
The clamping element is designed to be displaceable relative to the tool carrier, allowing it to move from a clamping position (where it secures the cutting insert) to an indexing position (where it releases the insert for rotation). This dynamic adjustment enables the system to switch between securing and indexing states without complete removal of fastening components.
Solution Approach 2:
The fastening and indexing functions are separated into distinct operational phases: the fastening screw maintains continuous engagement with the tool carrier while the clamping element independently adjusts its position. This segmentation allows the screw to provide continuous retention while the clamping element enables indexing movement.
2Productivity
If the fastening screw is removed completely for indexing, then the cutting insert can be rotated, but the process becomes more time-consuming
Solution Approach 1:
The displaceable clamping element allows for rapid transition between clamping and indexing states through simple linear movement, eliminating the time-consuming process of complete screw removal and reinstallation. The dynamic design enables quick positioning adjustments during indexing operations.
3Reliability
If the fastening screw and clamping element can be displaced jointly, then the cutting insert remains secured during indexing, but the mechanism becomes more complex
Solution Approach 1:
The fastening screw and clamping element work together as an integrated system where the screw provides continuous anchoring to the tool carrier while the clamping element provides adjustable clamping force on the cutting insert. This combination merges the functions of retention and positioning into a unified mechanism that maintains reliability without excessive complexity.
Data Source
AI summary
A machining tool includes a tool carrier with at least one seat receiving an exchangeable, indexable cutting insert. A fastening screw fastening cutting insert to seat has a head section for support on the cutting insert and a shaft section at least regionally having an external screw thread. The seat has a contact face supporting an underside of the cutting insert and at least one lateral bearing face supporting a side surface of the cutting insert. A through-hole is formed in the contact face, through which the shaft portion of the fastening screw extends. A clamping element is disposed on the tool carrier on the rear side of the contact face of the seat, in which an internal screw thread is formed, cooperating with the external screw thread of the fastening screw. The fastening screw and the clamping element can be jointly displaced in a displacement direction.