Adaptive Sealing Spray System for Vehicle Body Tolerances
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Solution Overview
Problem
The application of sealing and/or coating substances on vehicle body components is hindered by dimensional deviations due to manufacturing tolerances, leading to suboptimal production results and cycle-time inefficiencies.
Innovation Solution
An apparatus comprising kinematics, a spray device, and sensors that acquire CAD-based and actual information in real time to create and execute adaptive movement and application profiles, ensuring precise application regardless of component deviations from ideal dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional spray painting methods are used with fixed robot paths, then the application process is simple and fast, but the coating quality deteriorates due to manufacturing tolerances and dimensional deviations of components
Solution Approach 1:
The system performs preliminary scanning of the component surface before coating application to capture actual dimensional deviations. This advance measurement allows the control unit to pre-calculate corrected robot paths that compensate for manufacturing tolerances, ensuring high coating quality without requiring complex real-time adjustments during the coating process itself.
Solution Approach 2:
The system uses optical or laser sensors to scan the component surface and feed back actual dimensional data to the control unit. This feedback loop enables dynamic adjustment of the robot's movement path based on measured deviations, allowing the system to adapt to each component's specific geometry and maintain consistent coating quality despite manufacturing variations.
2Manufacturing precision
If adaptive path adjustment is implemented to compensate for dimensional deviations, then coating quality improves, but the production cycle time increases due to additional measurement and calculation steps
Solution Approach 1:
The scanning and measurement operations are performed as a preliminary step before coating application, allowing all necessary path calculations to be completed in advance. This separation of measurement and coating operations enables parallel processing where the robot can begin coating while measurements are being taken, minimizing the impact on overall production cycle time.
Solution Approach 2:
The system replaces complex mechanical path adjustment mechanisms with computational methods. Instead of physically adjusting the robot hardware to accommodate dimensional deviations, the control unit calculates and executes corrected digital paths based on sensor data. This substitution of mechanical adjustment with software-based path correction maintains productivity while achieving high coating uniformity.
3Measurement precision
If real-time sensor data acquisition is used to adapt to component variations, then application accuracy improves, but the system complexity and cost increase
Solution Approach 1:
The system employs multi-functional sensors that can perform both scanning/measurement and alignment functions with a single device. The optical or laser sensor serves multiple purposes: capturing dimensional deviations, determining component position, and providing data for path calculation. This multi-functionality reduces the need for multiple specialized sensors and simplifies the overall control architecture.
Solution Approach 2:
The system creates a digital copy or model of the component's actual geometry through scanning. This virtual replica is then used for path calculation and simulation, allowing the system to work with digital data rather than requiring complex physical measurement and adjustment mechanisms. The digital model serves as a surrogate for the physical component, simplifying the control system while maintaining measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for accurate and efficient application of sealing and/or coating substances, adapting to actual component dimensions and improving production quality by integrating CAD-based and sensor-acquired data for real-time adjustments.
Implementation Method 1
acquiring actual information on the component by the sensor
Implementation Method 2
a sealing and/or coating substance is usually applied by compressed air as it leaves a nozzle by a spray device, in particular is atomized
Implementation Method 3
In the case of electric paint spraying, a spray mist is electrostatically charged and sprayed onto a grounded workpiece
Implementation Method 4
In the case of very-high-pressure spraying, a sealing and/or coating substance is atomized to a greater extent by very high pressure
Data Source
AI summary
An apparatus for applying a sealing and/or a coating substance to a component, in particular a vehicle body component. The apparatus includes kinematics, a spray device, and a sensor. The apparatus is configured to: a) acquire computer-aided design (CAD)-based information on the component; and in real time: b) acquire actual information on the component by the first sensor; c) create a movement profile for the kinematics and an application profile for the spray device on a basis of the CAD-based information and the actual information; and d) execute the movement profile and the application profile on the component.