Milling Head Assembly for Precise Radial Alignment and Torque Transfer
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Solution Overview
Problem
Existing rotary milling tools face challenges in secure radial alignment and efficient torque transfer between the milling head and tool holder, leading to potential misalignment and reduced cutting efficiency.
Innovation Solution
The design incorporates a milling head with integrally formed cutting edges and a tool holder featuring distinct driven and radial centering surfaces, ensuring secure radial alignment and effective torque transfer through a recessed structure with driven teeth and a clamping mechanism, preventing inadvertent reversal and optimizing cutting edge geometry for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If traditional milling heads use separate cutting inserts instead of integrally formed cutting edges, then replacement of worn cutting edges is easier, but manufacturing complexity and material usage increase
Solution Approach 1:
The cutting edges are integrally formed with the milling head body as a single unit, eliminating the need for separate cutting inserts. This merging of the cutting edges with the head body simplifies the overall structure while maintaining the ability to replace only the milling head rather than the entire tool assembly when cutting edges wear.
2Ease of operation
If the milling head uses a simple attachment mechanism to the tool holder, then ease of assembly is improved, but radial alignment precision and torque transfer efficiency deteriorate
Solution Approach 1:
The milling head employs asymmetric driven surfaces including a crowned face and beveled edge that mate with corresponding asymmetric driving surfaces on the tool holder. This asymmetric design provides inherent radial alignment and prevents misalignment during operation, while the asymmetry also prevents inadvertent reversal of the milling head on the tool holder.
Solution Approach 2:
The attachment mechanism extends beyond simple radial engagement by incorporating axial elements such as the crowned face and beveled edge that engage in multiple dimensions. This multi-dimensional engagement ensures precise radial alignment and efficient torque transfer while maintaining ease of assembly through a straightforward insertion and clamping process.
3Power
If the driven surfaces are located radially inward, then torque transfer is improved, but radial alignment stability worsens
Solution Approach 1:
The design combines radially inward driven surfaces for torque transfer with radially outward centering surfaces for alignment stability. By utilizing both radial dimensions simultaneously, the milling head achieves efficient torque transfer through the crowned face and beveled edge while maintaining stable radial alignment through the centering surfaces that contact the tool holder.
Data Source
AI summary
A rotary milling tool has a tool holder and a milling head releasably attached thereto. The milling head has a plurality of angularly spaced apart peripherally disposed cutting edges which form an effective cutting edge. The milling head has a head through recess opening out to the head forward and rearward surfaces. The recess includes a centering region and a driven region, the driven region being axially forward of, and non-identical to, the centering region. The driven region has at least one driven surface facing opposite a rotational direction. The centering region has at least one radially inwardly facing radial centering surface located axially rearward of, and radially outward from, the at least one driven surface. The two opposing extremities of the effective cutting edge define two parallel planes respectively between which both the at least one driven surface and the at least one radial centering surface are disposed.