Suction Nozzle Mounting Alignment Across Component Height Changes
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Solution Overview
Problem
Existing operation machines with holding tools face challenges in accurately estimating and correcting the moving direction tilt during raising and lowering, leading to deviations in component holding and mounting positions, especially when components are loaded at different heights.
Innovation Solution
An operation machine is configured with a component mounter that includes an imaging system and a control device to calculate the deviation amount of the loading position, allowing for precise estimation and correction of the moving direction tilt by using a loading body to determine the correct positioning of components on a receiving member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the moving direction tilt of the holding tool is not corrected, then the device structure remains simple, but the component mounting position accuracy deteriorates
Solution Approach 1:
The patent replaces complex mechanical tilt correction mechanisms with an imaging-based detection system. By using an imaging device to capture images of components at different heights and calculating tilt from the images, the system achieves accurate tilt detection without requiring complex mechanical adjustment mechanisms, thus improving mounting accuracy while maintaining relatively simple device structure.
Solution Approach 2:
The patent uses imaging to create a visual copy of the component positions and calculates tilt from this optical copy rather than using complex mechanical sensors. The imaging device captures the position information, and the control device processes this visual data to determine and correct tilt, replacing complex physical measurement systems with simpler optical copying and computational methods.
2Manufacturing precision
If components are loaded at different heights without tilt correction, then the loading process remains flexible, but the component holding position accuracy deteriorates
Solution Approach 1:
The patent replaces difficult mechanical tilt measurement systems with imaging-based detection. The imaging device captures component positions visually, and the control device calculates tilt from these images through image processing and coordinate transformation, making tilt detection much easier while improving holding position accuracy.
Solution Approach 2:
The patent introduces an intermediary imaging device that mediates between the physical component positions and the tilt measurement. Instead of directly measuring tilt mechanically, the system uses the imaging device as an intermediary to capture position data, which is then processed to derive tilt information, simplifying the measurement process while improving accuracy.
3Measurement precision
If tilt calculation is performed without considering component height differences, then the calculation process remains simple, but the tilt estimation accuracy deteriorates
Solution Approach 1:
The patent performs preliminary actions by capturing images of components at multiple predetermined heights before calculating tilt. By pre-positioning components at different heights and capturing their images in advance, the system gathers necessary data for accurate tilt calculation, improving measurement precision while keeping the calculation process manageable through systematic data collection.
Solution Approach 2:
The patent segments the measurement process by dividing it into distinct steps: capturing images at different heights, detecting component positions in each image, calculating coordinate transformations, and finally determining tilt. This segmentation of the calculation process into manageable stages improves tilt estimation accuracy while maintaining a structured and manageable calculation workflow.
Data Source
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AI summary
If the moving direction of a suction nozzle during raising and lowering deviates from a vertical direction, appropriate work cannot be guaranteed because the holding position of a component by the suction nozzle will vary depending on the holding height of the component by the suction nozzle. Thus, a component loaded at a specified height (H) position from the upper surface of a stage is held by a suction nozzle, and that component is loaded at a specified position. Then, the component is imaged and the loading position (first height component loading position) of the component is calculated. Further, the component loaded on the stage is held by the suction nozzle and the component is loaded at the above specified position. Then, the component is imaged and the component loading position (second height component loading position) is calculated. Next, the deviation amount between the first height component loading position and the second height component loading position is calculated. Thus, appropriate mounting can be guaranteed by performing correction of the component holding position, correction of the component loading position, or the like, based on the deviation amount.