Milling Cutter Head Axial Blade Positioning
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Solution Overview
Problem
Existing milling heads face challenges in achieving precise axial, radial, and planar positioning of cutters for fine finishing of drive shafts and camshafts, particularly case-hardened components, due to issues with cutter alignment and the interaction of radial and axial forces during high-speed rotation.
Innovation Solution
A milling head design featuring blade holders with axially movable shanks fitted in bores of the base body, fixed by a centrally located retaining element and holddown ring, allowing precise positioning and alignment through a wedge mechanism, enabling precise axial and radial adjustment without generating centrifugal forces during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If blade holders are positioned radially inward at a distance from the periphery to absorb centrifugal forces, then high-speed rotation stability is improved, but axial positioning precision of cutters deteriorates
Solution Approach 1:
The blade holder is divided into two functional parts: a shank portion fitted in the base body bore for axial positioning, and a clamping portion for radial securing. This segmentation allows each part to optimize its function independently - the shank ensures axial precision while the clamping mechanism provides radial stability at high speeds.
Solution Approach 2:
A centrally located retaining element acts as an intermediary between the blade holder and the base body. This retaining element precisely guides the blade holder axially while allowing the holddown ring to secure it radially, thus resolving the contradiction between axial positioning precision and high-speed rotation stability.
2Manufacturing precision
If multiple adjustment mechanisms are used for precise cutter positioning, then positioning precision is improved, but device complexity increases
Solution Approach 1:
Multiple positioning functions (axial guidance, radial clamping, and blade holding) are merged into a single integrated blade holder component. The shank provides axial guidance, the clamping portion enables radial securing, and the centralized retaining element coordinates both functions, eliminating the need for separate adjustment mechanisms for each function.
Solution Approach 2:
The blade holder is designed as a multi-functional component that simultaneously performs axial positioning, radial clamping, and blade retention. This universal design reduces the overall number of components and adjustment mechanisms while maintaining high positioning precision in both axial and radial directions.
3Adaptability or versatility
If blade holders are made interchangeable with different cutting components, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The shank of the blade holder is pre-formed with precise geometric features that fit into corresponding bores in the base body. This preliminary precision machining of the shank-bore interface ensures that whenever a blade holder is installed or replaced, it automatically achieves the correct axial and radial positioning, maintaining manufacturing precision despite interchangeability.
Solution Approach 2:
All blade holders are manufactured with identical shank dimensions and geometric features, creating homogeneous interfaces with the base body bores. This homogeneity ensures that any blade holder can be interchangeably mounted while maintaining consistent positioning precision, as each holder interacts with the base body in the same standardized manner.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables precise and interchangeable blade positioning, maintaining high guidance accuracy and machining quality even at high rotational speeds, allowing for efficient dry finishing of drive shafts and camshafts with reduced disposal costs and improved surface finish.
Implementation Method 1
The blade holders can be axially moved via a wedge
Implementation Method 2
surrounded by an external holddown ring shrink-fitted into the base body
Data Source
AI summary
The invention relates to a milling cutter head having a number of blade supports (11) which are inserted in recesses of a base body (10) and have blades (12), wherein each blade support can be axially displaced by a wedge and fixed in the milling cutter head by clamping elements. According to the invention, the blade supports each have a shank which is arranged in a receiving bore of the base body and can be fixed via a centrally (13) located clamping piece (18).