Conical Milling Head for Accurate Undercut Rib Machining
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Solution Overview
Problem
The T-shaped cutter used for machining undercut sections, such as ribs with return flanges, faces challenges with increased rib height, leading to higher lateral forces on the shank, which can cause deformation, reducing machining speed and accuracy.
Innovation Solution
A milling tool with a shank section and a head featuring an expanding diameter section and a contracting diameter section, equipped with cutting edges on both sections and a tip end cutting edge extending to the center axis, allowing for efficient machining of undercut sections without interfering with return flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shank length is increased to machine higher ribs, then the machining capability is improved, but the lateral force causes shank deformation reducing machining accuracy
Solution Approach 1:
The invention transitions from a conventional cylindrical shank to a head with three-dimensional conical surfaces (expanding and contracting diameter sections). This dimensional change allows cutting edges to be positioned at multiple radial distances from the center axis, enabling the tool to machine higher ribs without increasing shank length, thus maintaining machining accuracy while expanding adaptability.
2Ease of operation
If the shank protrusion length is increased to reach undercut sections, then the machining accessibility is improved, but the shank rigidity decreases causing deformation
Solution Approach 1:
The conical head structure allows cutting edges to access undercut sections through radial positioning at different distances from the center axis rather than increasing axial protrusion length. This maintains shank rigidity while providing the necessary machining accessibility to reach rib roots and undercut sections.
3Strength
If a T-shaped cutter with integral structure is used, then the cutter rigidity is improved, but the shank deformation occurs under high lateral force
Solution Approach 1:
The invention replaces the conventional T-shaped cutter with a head featuring expanding and contracting conical surfaces. This allows cutting edges to be positioned at multiple radial distances, enabling the tool to machine undercut sections with a shorter, stiffer shank configuration, thus maintaining both cutter rigidity and machining accuracy.
4Manufacturing precision
If multiple tools are used to machine corners and flat surfaces separately, then the machining completeness is improved, but the machining time increases
Solution Approach 1:
The head with expanding and contracting diameter sections integrates multiple cutting edge positions that can simultaneously machine both corner sections (at smaller radial distance) and flat surfaces (at larger radial distance). This multi-functional design eliminates the need for tool changes or separate machining operations, reducing machining time while maintaining complete machining quality.
Data Source
AI summary
A milling tool includes a shank section and a head, the head provided on a tip end side of the shank section and having cutting edges. The head includes an expanding diameter section and a contracting diameter section, the expanding diameter section gradually increasing in diameter as it spans toward the tip end from a base end portion adjoining the shank section, and the contracting diameter section gradually decreasing in diameter as it spans toward the tip end from a maximum diameter section. At least one cutting edge is provided on each of the expanding diameter section and the contracting diameter section. At least one tip-end cutting edge that extends from the contracting diameter section to a center axis of the milling tool is provided on a tip end portion of the head.