Cutting Tool Holder With Adjustable Support Surfaces
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Solution Overview
Problem
Existing cutting tools and holders are limited in their ability to produce bevel angles other than 90° and do not provide optimal support for cutting inserts during machining, leading to reduced tool life and manufacturing accuracy.
Innovation Solution
The cutting tool features a cutting insert with obliquely running cutting edges and a holder with support surfaces arranged at specific angles to ensure optimal support, preventing tilting and twisting, allowing for use in various machining operations including plunge milling and face milling, with adjustable support surfaces to accommodate different bevel angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the holder uses conventional support surfaces for 90° shoulder milling, then it can effectively support cutting inserts for 90° corners, but it cannot produce other bevel angles or shoulders
Solution Approach 1:
The holder incorporates adjustable support surfaces that can be repositioned along guide surfaces to accommodate different bevel angles. The support surfaces are movable relative to each other, allowing the holder to adapt its geometry for various machining operations while maintaining stable support for the cutting insert in each configuration
Solution Approach 2:
The support structure is divided into multiple independent support surfaces (first support surface, second support surface, third support surface) that can be independently positioned and adjusted. This segmentation allows each surface to be optimized for specific angular positions while collectively providing comprehensive support for the cutting insert
2Manufacturing precision
If the cutting insert is not optimally supported, then the tool can accommodate various angles, but the cutting insert tilts and twists during machining, reducing tool life and accuracy
Solution Approach 1:
The adjustable support surfaces allow the holder to dynamically adapt its support configuration to match the specific machining operation and bevel angle being performed. This dynamic adjustment ensures optimal support geometry for each operation without requiring multiple specialized holders
Solution Approach 2:
Guide surfaces act as intermediaries between the fixed holder structure and the adjustable support surfaces. These guide surfaces provide precise positioning paths that ensure the support surfaces are correctly oriented relative to the cutting insert, simplifying the adjustment mechanism while maintaining precision
3Duration of action of moving object
If lateral force components act on the cutting insert, then the cutting tool can handle various machining conditions, but the cutting insert tilts and twists, reducing its service life
Solution Approach 1:
The support surfaces are positioned and angled to provide counter-forces that balance the lateral force components generated during machining. By strategically placing support surfaces at specific angles, the holder creates opposing forces that prevent tilting and twisting moments on the cutting insert
Solution Approach 2:
The adjustable support surfaces can be repositioned to optimally counterbalance lateral forces specific to different machining operations and bevel angles. This dynamic adjustment allows the holder to adapt its force distribution to match the specific loading conditions of each operation
Data Source
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AI summary
The invention relates to a cutting tool for machining workpieces, having a cutting insert (14) and a holder (18) having a seat (30) for receiving the cutting insert (14), wherein: the cutting insert (14) comprises at least one cutting edge (10) opening diagonally relative to a base surface (16) of the cutting insert (14) and in a point (12) of the cutting insert (14), the cutting insert (14) comprises two contact surface (20a, 20b) approaching each other at a contact angle (b), the seat (30) in the holder (28) comprises a base support surface (44) for supporting the base surface (16) of the cutting insert (14) and two support surfaces (46, 48) extending transverse to the base support surface (44) and at a support angle (g) for supporting the contact surfaces (20a, 20b) of the cutting insert (14), and the contact angle (b) corresponds to the support angle (g).