Tooth Replacement Part Machining With Parallel Pin Tools
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Solution Overview
Problem
Existing methods for producing tooth replacement parts, such as crowns and bridges, are lengthy and prone to inaccuracies due to tool deflections and the need for secondary machining, especially when processing complex surface structures with undercuts and curved surfaces.
Innovation Solution
A method using a CAM processing device with two pin-shaped processing tools oriented parallel to each other, allowing simultaneous machining from opposite sides, and varying the orientation of the blank body relative to the tools to optimize the angle of contact, thereby reducing processing time and minimizing tool wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single processing tool is used to machine complex curved surfaces and undercuts from different spatial directions, then the tooth replacement part can be produced, but the processing time becomes relatively lengthy and inaccuracies occur due to tool deflections
Solution Approach 1:
The patent divides the single processing task into two separate processing tools working simultaneously from opposite sides. The first processing tool machines one side of the blank body while the second processing tool machines the opposite side, allowing parallel processing of different surface regions without tool deflection interference, thus reducing total processing time while maintaining accuracy
Solution Approach 2:
The patent combines two processing operations into a single unified processing step by coordinating two processing tools to work simultaneously on the same blank body. This merging of operations eliminates the sequential processing time and allows both sides to be machined in parallel, significantly reducing overall processing time while maintaining precision through synchronized control
2Adaptability or versatility
If a processing tool engages with the blank body from different spatial directions to machine curved surfaces, then complex geometries can be produced, but tool deflections cause inaccuracies requiring secondary machining by hand
Solution Approach 1:
Instead of moving a single tool from different spatial directions to machine complex surfaces, the patent inverts the approach by using two tools positioned on opposite sides that machine simultaneously from their respective directions. This inversion eliminates tool deflection issues associated with single-tool multi-directional machining while maintaining the ability to produce complex geometries through coordinated dual-tool operation
3Shape
If the processing tool is moved along multiple axes to machine complex surfaces, then the desired geometry can be achieved, but the processing becomes lengthy and tool wear increases
Solution Approach 1:
The patent segments the complex surface machining task into two independent but coordinated processing operations, with each tool responsible for one side of the blank body. This segmentation allows simultaneous processing of different geometric features without requiring extensive multi-axis movements of a single tool, thereby reducing processing time and tool wear while achieving the desired complex geometry
Data Source
AI summary
The invention relates to a method for producing a tooth replacement part from a blank using a CAM processing device. The method includes a step of varying the orientation of a blank body in a processing position relative to two processing tools. The varying includes a first orienting of the blank body and processing tools relative to one another from a first processing orientation into a second processing orientation. In so doing, the orientation of the blank body relative to the two processing tools in the first processing orientation in relation to the orientation of the blank body relative to the two processing tools in the second processing orientation is pivoted at a first pivot angle.