AR Workpiece Positioning for CNC Clamp Setup Accuracy
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Solution Overview
Problem
Current CNC machining processes require manual positioning of workpieces and clamping means, which is time-consuming, prone to errors, and laborious, with difficulty in checking completeness and collision avoidance.
Innovation Solution
An augmented reality display device worn by the user superimposes target position information onto the real image of the workpiece support, allowing for precise and efficient manual positioning of workpieces and clamping means, reducing the need for extensive measuring and remeasuring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual positioning is performed using conventional methods (reading coordinates from layout diagrams and transferring them with measuring devices), then the workpiece and clamping means can be positioned on the workpiece support, but the process is time-consuming and prone to errors
Solution Approach 1:
The patent replaces the conventional mechanical measuring system (rulers, coordinate reading from diagrams) with an optical/electronic system consisting of cameras, image processing algorithms, and augmented reality displays. The system captures images of the workpiece support, automatically detects reference features, calculates target positions digitally, and presents them visually to the operator, eliminating manual measurement and calculation steps.
Solution Approach 2:
The system creates a digital copy of the workpiece support and layout diagram through image capture and processing. Instead of physically measuring and transferring coordinates from paper diagrams, the system generates a digital representation and overlays the target position information directly onto the visual field, allowing the operator to see the exact positioning location without manual measurement.
2Reliability
If conventional manual positioning methods are used, then positioning can be completed, but checking the correctness of positioning requires laborious remeasuring
Solution Approach 1:
The system provides immediate visual feedback to the operator during the positioning process. The augmented reality display shows the target position overlaid on the actual workpiece support, allowing the operator to verify correct positioning in real-time. After positioning, the system can capture another image to confirm the workpiece and clamping means are at the correct locations, eliminating the need for separate remeasuring steps.
3Measurement precision
If coordinates are read from layout diagrams and transferred using measuring devices, then positioning information can be obtained, but the process involves high susceptibility to errors
Solution Approach 1:
The patent replaces the complex manual process of reading coordinates from diagrams and physically measuring with an automated image-based system. The camera captures the workpiece support, software automatically identifies reference features, calculates target positions using digital processing, and displays them visually. This eliminates the multiple manual steps (reading, calculating, measuring, transferring) that each introduced potential for error.
4Reliability
If the number of positioned clamping means and workpieces is checked for completeness, then positioning accuracy can be verified, but this checking is difficult in conventional assemblies
Solution Approach 1:
The system automatically verifies completeness by comparing the actual positioned items against the digital model. The image processing system can detect the presence and position of workpieces and clamping means, automatically determining whether all required elements are correctly positioned. This automated verification is much easier than manual checking and provides reliable feedback on positioning completeness.
Data Source
AI summary
An assembly includes a CNC machining center for machining a board-shaped workpiece, in particular made of wood or of at least one wood substitute, a workpiece support, and a workpiece and/or clamp to be positioned on the workpiece support at least partially manually for securing the at least one workpiece. An augmented reality display device is formed to superimpose a real image of the workpiece support or of a part thereof with information on a specifiable target position and/or target machining contour of the workpiece and/or on a specifiable target position of the clamping means. The augmented reality display device can be worn on the body by a user, who positions the workpiece and/or clamping means on the workpiece support at least partially manually.