Workpiece Processing Point Correction via 3D Contour Alignment
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Solution Overview
Problem
Conventional methods for industrial robots fail to accurately determine processing points for workpieces, leading to misalignment and quality issues, especially in high-precision applications like electronic device manufacturing.
Innovation Solution
A method and apparatus that adjust sample workpiece points based on input from a human machine interface, using 3D camera-acquired contour points to align the workpiece with a model, ensuring accurate processing paths for operations like gluing, drilling, or welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional robot processing methods are used, then the processing speed and automation are maintained, but the processing accuracy deteriorates due to misalignment of workpiece loading and clamping
Solution Approach 1:
The system performs preliminary actions by acquiring contour points of the workpiece before processing, determining offset values between actual and model contour points, and pre-adjusting the processing path based on these offsets. This preliminary measurement and correction approach eliminates misalignment issues before the actual processing begins, thereby improving processing accuracy without requiring complex hardware modifications
Solution Approach 2:
The patent replaces complex mechanical alignment systems with a computational approach. Instead of using sophisticated mechanical fixtures and alignment devices, the system uses contour point acquisition, offset calculation, and software-based processing path adjustment to achieve high precision, thereby improving accuracy while avoiding increased mechanical system complexity
2Reliability
If workpiece contour points are acquired from a 3D camera, then the reliability of workpiece positioning is improved, but the system complexity increases due to additional sensing equipment
Solution Approach 1:
The patent introduces a workpiece model as an intermediary between the 3D camera and the processing system. The contour points acquired from the 3D camera are compared against the pre-established workpiece model to determine offsets. This intermediary model simplifies the processing by providing a reference framework, thereby improving positioning reliability while keeping the sensing system complexity manageable through standardized modeling procedures
3Manufacturing precision
If the processing path is adjusted based on offset values, then the accuracy of processing path is improved, but the complexity of path calculation increases
Solution Approach 1:
The patent segments the processing path adjustment into distinct steps: first acquiring contour points, then calculating offsets between actual and model points, and finally applying these offsets to adjust the processing path. This segmentation of the calculation process into modular, sequential operations improves path accuracy while managing computational complexity by breaking down the overall task into manageable segments that can be processed systematically
Data Source
AI summary
Methods and devices for determining a point for processing a workpiece. The methods include receiving an input representing an offset for adjusting a sample workpiece point, the sample workpiece point corresponding to a workpiece point for processing the workpiece, adjusting the sample workpiece point based on the input, so as to generate an adjusted sample workpiece point, and determining the workpiece point based on the adjusted sample workpiece point.