CNC Machine Calibration for Dental Workpiece Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
CNC machines used in dental manufacturing face limitations in accuracy due to clearance between moving parts and tolerance issues, leading to misalignment of machine axes, which affects the quality of machined dental workpieces.
Innovation Solution
A calibration method where a test body is used to check calibration parameters such as axis alignment and zero points, with correction values calculated to compensate for deviations, allowing precise machining by accounting for these inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If clearance is provided between moving parts for assembly, then ease of assembly is improved, but axis alignment accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by performing calibration before actual machining operations. A test piece is measured to detect axis alignment deviations, and correction values are calculated in advance. These correction values are then stored and automatically applied during subsequent machining operations, eliminating the need for physical reassembly or adjustment of components.
Solution Approach 2:
The patent changes parameters by transforming physical axis alignment parameters into digital correction values. Instead of physically adjusting the mechanical alignment of axes, the system measures the actual alignment state and represents it through numerical correction factors that are applied during control operations, thereby maintaining both assembly ease and machining precision.
2Ease of manufacture
If tolerance is provided in machine components, then ease of manufacture is improved, but machining accuracy deteriorates
Solution Approach 1:
The patent implements feedback by measuring the actual machining results on a test piece and using this measurement information to calculate correction values. This closed-loop feedback mechanism allows the system to detect deviations caused by component tolerances and compensate for them through software-based correction, thereby maintaining high machining accuracy despite the use of standard tolerance-ranged components.
Solution Approach 2:
The system transforms the physical dimensional parameters of machine components into corrected digital parameters through measurement and calculation. By representing tolerance-induced deviations as numerical correction values, the system can compensate for these variations without requiring tighter manufacturing tolerances on the physical components themselves.
3Manufacturing precision
If calibration is performed to correct axis misalignment, then machining precision is improved, but operation time increases
Solution Approach 1:
The patent applies preliminary action by performing the calibration measurement and correction value calculation once during initial setup or periodic maintenance. The correction values obtained are then stored and automatically applied during all subsequent machining operations without requiring repeated calibration procedures, thereby minimizing the time impact to only the initial calibration phase.
Data Source
Figure 1
Figure 2~3
Figure 4a~4b
AI summary
Method for operating a CNC machine (1) for machining a dental workpiece (2), wherein - when the CNC machine (1) is operated in a machining mode (BM) - the dental workpiece (2) clamped in a clamping device (3) is machined by a machining device (4) of the CNC machine (1), wherein - when the CNC machine (1) is operated in a calibration mode (KM) - at least one calibration parameter (K) of the CNC machine (1) is checked using a test piece (5) and at least one correction value (Q) is determined, wherein the CNC machine (1) is operated in machining mode (BM) depending on the at least one correction value (Q).