Segmented Dental Milling Cutter for Rapid Penetration and Fine Surface
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Solution Overview
Problem
Current dental milling cutters face challenges in achieving both rapid penetration into materials and fine surface machining simultaneously, as existing designs often prioritize one property over the other.
Innovation Solution
A dental milling cutter with a milling head featuring teeth that extend over its entire contour, divided into sections with alternating basic toothings, allowing for varying tooth configurations in terms of number, depth, shape, and angle to accommodate different machining requirements, ensuring consistent surface processing properties across the entire head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dental milling cutter uses a single basic toothing design, then the structure is simple, but it cannot achieve both rapid penetration and fine surface machining simultaneously
Solution Approach 1:
The milling head circumference is divided into multiple sections, each section containing teeth with different basic toothings. This segmentation allows different sections to perform different functions: some sections optimized for rapid material penetration while others optimized for fine surface machining, thereby resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
Different sections of the milling head are equipped with locally optimized tooth configurations. Each section has teeth with specific parameters (number of teeth, tooth depth, tooth shape, face angle, back angle) tailored to its intended function, enabling local optimization for either rapid penetration or fine surface finishing without compromising the other.
2Productivity
If sections with different basic toothings are introduced, then both penetration and surface quality are improved, but the device complexity increases
Solution Approach 1:
The milling head is segmented into distinct sections along its circumference, with each section containing teeth of a specific basic toothing type. This segmentation strategy manages complexity by organizing different tooth configurations into discrete, manageable sections rather than attempting to optimize each tooth individually across the entire head.
Solution Approach 2:
The milling head is designed as a multi-functional tool that can perform both rapid penetration and fine surface machining within a single device. By incorporating multiple basic toothings in different sections, the tool achieves universality, allowing it to adapt to different machining requirements without requiring multiple separate tools.
3Reliability
If alternating sections with different basic toothings are used, then operational vibrations are reduced, but the manufacturing complexity increases
Solution Approach 1:
The milling head features asymmetric distribution of different basic toothings in alternating sections around the circumference. This asymmetric arrangement disrupts the symmetry that would otherwise generate periodic vibrations during rotation, thereby reducing operational vibrations and improving reliability while maintaining manufacturability through standardized section design.
Data Source
Figure 1a~1c
Figure 1d
Figure 2a~2b
AI summary
The dental milling cutter (10) has a milling head (12) provided with teeth which extend across an entire length of a contour of the milling head. The circumference of the milling head is divided into multiple sections partially provided with different basic teeth, when seen from a center longitudinal axis (16) of the milling cutter. The sections extend across the entire length of the milling head.