Dental Fitting Body Milling With Deep-Cut Contour Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing dental fitting bodies with custom three-dimensionally curved outer contours are limited by slow machining speeds and tool wear due to small volumes removed per unit time and shallow cutting depths, necessitating manual detachment of remnants.
Innovation Solution
A method involving a tool with defined cutting edges on its circumferential surface, rotating about its axis and moving orthogonally or inclined to the tool axis, with insertion depths greater than twice the tool diameter, and machining along a path transverse to the contour, allowing high-volume material removal and reduced tool wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shallow cutting depths and small volumes are removed per unit time, then tool wear is reduced, but machining speed decreases and production time increases
Solution Approach 1:
The patent transitions from conventional shallow cutting to deep cutting by changing the insertion depth dimension to at least twice the tool diameter. This dimensional change enables high-volume material removal while maintaining tool life through optimized cutting parameters and tool path strategies that distribute stress and heat across the tool structure.
Solution Approach 2:
The patent fundamentally changes the cutting depth parameter from shallow to deep (at least 2x tool diameter), and modifies other parameters including cutting speed, feed rate, and tool path configuration to accommodate deep cutting conditions. These parameter changes enable simultaneous achievement of high productivity and acceptable tool life.
2Productivity
If deep cutting with insertion depth of at least twice the tool diameter is used, then machining speed and material removal volume increase, but tool stress and potential tool breakage increase
Solution Approach 1:
The patent employs dynamic tool path strategies that adjust cutting parameters during the machining process. The tool moves along optimized paths that distribute the mechanical load dynamically, preventing concentration of stress at any single point. This dynamic approach maintains tool structural integrity while enabling deep cutting for high material removal rates.
Solution Approach 2:
The patent uses preliminary roughing passes that gradually remove material before final finishing passes. This staged approach prepares the workpiece and distributes tool stress over multiple operations, preventing sudden overload that could cause tool breakage while still achieving high overall material removal volume.
3Stability of the object's composition
If conventional layer-wise milling is used, then the dental article remains within the blank, but multiple passes are required and production time increases
Solution Approach 1:
The patent removes material not only in the lateral dimension but also in the depth dimension by using insertion depths of at least twice the tool diameter. This three-dimensional material removal approach frees the dental article from the blank in a single pass or fewer passes, dramatically reducing production time while maintaining workpiece integrity through controlled cutting strategies.
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
This approach increases machining speed and extends tool life by enabling deeper cuts and simultaneous removal of remnant material without specialized tools, reducing overall production time and maintaining workpiece stability.
Implementation Method 1
a tool with defined cutting edges on its circumferential surface, rotating about its axis and moving orthogonally or inclined to the tool axis
Data Source
AI summary
In the method for producing medical, in particular dental fitting bodies with a specified or custom three-dimensionally curved outer contour or preform of the fitting body with a rough outer contour, which has an allowance relative to the outer contour, a workpiece from which the fitting body or its preform is produced, is machined in a material-removing manner by means of a tool engaging in the workpiece The tool path has directional components transverse to the run of the contour to be produced and the cutting edges have a defined geometry. The tool engages into the workpiece at a cutting arc angle alpha of the circumferential surface of less than 90° on average and at an insertion depth of at least twice the tool diameter (D) and the machining of the workpiece occurs along a tool path with directional components contrary to a machining direction following the outer contour.