Vehicle Body Coating Path Visualization for Accurate Robot Spraying
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Solution Overview
Problem
Current coating techniques for motor vehicle bodies, especially in automated systems, face challenges in optimizing nozzle trajectories due to reliance on operator gestures during learning phases, lack of positioning accuracy, and difficulty in visualizing coated areas, leading to errors and inefficiencies in series production.
Innovation Solution
A process that involves a robot equipped with a nozzle following a predetermined trajectory while restoring a real-time image of presumed coated surfaces on the vehicle body, using image projection, augmented reality, or camera-based visualization to facilitate direct or indirect rendering of coated areas, allowing for real-time correction and optimization of the coating application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual learning phase with operator guidance is used to acquire three-dimensional coordinates, then the coating process can be initiated, but trajectory optimization is not achieved and operator errors are replicated in series production
Solution Approach 1:
The patent creates a virtual copy of the physical coating environment including the robot, nozzle, body part, and coating application process. This virtual model allows for precise trajectory calculation and simulation without manual operator intervention, eliminating the replication of human errors while maintaining ease of process initiation through automated modeling.
Solution Approach 2:
The patent replaces the manual mechanical guidance system with a computational system that uses numerical simulation and calculation to determine optimal trajectories. This substitution eliminates operator variability and provides mathematically optimized paths for coating application, improving both precision and consistency.
2Manufacturing precision
If numerical simulation is used to calculate optimal trajectory, then trajectory optimization is improved, but the actual robot execution deviates from theoretical path due to PLC prioritizing speed over positioning accuracy
Solution Approach 1:
The patent implements a feedback mechanism where the virtual model simulates the actual robot execution behavior including the PLC's speed prioritization. This allows the system to predict and compensate for execution deviations, adjusting the theoretical trajectory to account for real-world robot behavior and ensure accurate coating application.
Solution Approach 2:
The patent performs preliminary simulation and calculation in the virtual environment to determine corrected trajectories that account for expected execution deviations. By pre-compensating for the PLC's speed-over-accuracy behavior in the virtual model, the system ensures accurate coating application without requiring real-time corrections.
3Manufacturing precision
If manual calibration by trajectory planners is performed to adjust trajectory, then coating accuracy is improved, but the process relies on operator assessment ability and is time-consuming
Solution Approach 1:
The patent creates a virtual copy of the coating process where trajectory planners can assess and adjust trajectories without physical time constraints. The virtual environment provides immediate visualization of coating results, allowing rapid iteration and optimization without the time-consuming manual calibration process while maintaining high accuracy.
Solution Approach 2:
The patent replaces the manual mechanical calibration process with an automated virtual simulation system. The trajectory planning and assessment are performed computationally, eliminating the time-consuming manual intervention while providing more precise and consistent results through algorithmic optimization.
4Device complexity
If trajectory planning is performed without real-time visualization of coated surfaces, then the process is simpler, but error detection is difficult and operator assessment is unreliable
Solution Approach 1:
The patent creates a virtual copy of the coated surfaces that provides real-time visualization during the coating process. This virtual representation allows operators to detect errors and assess coating quality without adding physical complexity to the actual coating system, maintaining simplicity while enabling comprehensive monitoring.
Solution Approach 2:
The patent adds a virtual visualization dimension to the physical coating process. By rendering the presumed coated surfaces in a virtual environment, the system provides real-time feedback on coating application without interfering with the physical process, enabling error detection while maintaining process simplicity.
Data Source
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AI summary
The invention relates to a method for applying a coating to a part (1) of the bodywork of a motor vehicle by means of a robot (4) provided with a nozzle (5) for spraying the coating, said method comprising an operation of controlling the robot (4) such that the nozzle (5) follows a pre-determined path, and an operation for reproducing, in real time, an image (12) of the surfaces presumed to be coated on the bodywork part (1).