Milling Tool Cutting Inserts Axial Overlap Eccentric Fastening
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Solution Overview
Problem
Milling tools with tangential cutting inserts experience flexural stresses and tolerances due to alternating axial forces during cutting, leading to inaccuracies in machining.
Innovation Solution
The cutting inserts are arranged to overlap each other axially, with eccentrically configured fastening openings, allowing them to operate in pairs and balance cutting forces, reducing flexural stresses and tolerances by minimizing the effective lever arm of the cutting force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cutting inserts are arranged alternately on opposite sides of the base body, then the milling tool can maintain structural simplicity and ease of manufacturing, but alternating axial forces cause flexural stresses and tolerances during cutting
Solution Approach 1:
The cutting inserts are arranged asymmetrically with axial overlap instead of symmetric alternating positions. This asymmetric arrangement allows cutting inserts to operate simultaneously in pairs, balancing axial forces and eliminating flexural stresses on the base body while maintaining manufacturing simplicity
Solution Approach 2:
The overlapping arrangement of cutting inserts creates counterbalancing axial forces that offset each other. When cutting inserts operate simultaneously, their axial force components balance one another, preventing flexural stresses and maintaining manufacturing precision
2Device complexity
If cutting inserts operate alternately, then the milling tool structure is simpler, but the alternating axial forces create flexural stresses on the base body
Solution Approach 1:
The cutting inserts are arranged asymmetrically with axial overlap instead of symmetric alternating positions. This asymmetric arrangement allows cutting inserts to operate simultaneously in pairs, balancing axial forces and eliminating flexural stresses on the base body while maintaining manufacturing simplicity
Solution Approach 2:
The invention converts the potentially harmful alternating axial forces into beneficial balanced forces. By arranging cutting inserts to overlap and operate simultaneously, the axial force components balance each other, transforming the harmful alternating stress pattern into a beneficial force-balancing mechanism
3Manufacturing precision
If cutting inserts are positioned with overlap, then machining precision improves, but the fastening structure becomes more complex requiring eccentric fastening openings
Solution Approach 1:
The fastening openings are configured eccentrically rather than symmetrically, enabling the overlapping arrangement of cutting inserts. This asymmetric fastening configuration allows cutting inserts to be positioned with axial overlap while maintaining a relatively simple fastening structure using standard screws or other fastening elements
Data Source
AI summary
A milling tool with a disk- or strip-shaped base body, which can be driven around an axis of rotation, and several cutting inserts arranged along the outer circumference of the base body on opposite sides from one another, wherein the cutting inserts, viewed in the axial direction, overlap one another. The invention also relates to a tangential cutting insert for a milling tool of the above-mentioned type, with two side surfaces, through which a fastening opening extends, and two face ends, wherein cutting edges are formed at the junction of the front faces to the side surfaces, wherein the fastening opening is positioned eccentrically.