Board Work Machine Mounting Accuracy for Components with Characteristic Sections
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Solution Overview
Problem
Conventional board work machines struggle to improve mounting accuracy for components with characteristic sections on their upper surfaces, as the characteristic sections are often offset from the component's center, leading to suboptimal mounting positions even after calibration.
Innovation Solution
A board work machine equipped with a mounting head, memory section, and imaging devices that capture images from above and below to acquire position deviations of characteristic sections and apply specific correction values to ensure precise mounting, distinguishing between components with and without characteristic sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mounting position correction is performed based on calibration using chip components without characteristic sections, then general mounting accuracy is improved, but mounting accuracy of components with characteristic sections on upper surfaces cannot be improved
Solution Approach 1:
The patent applies different correction methods for different component types. Components with characteristic sections on upper surfaces use upper surface imaging and characteristic section-based correction, while components without such sections use lower surface imaging and center-position-based correction. This local differentiation resolves the contradiction by tailoring the correction approach to the specific characteristics of each component type.
Solution Approach 2:
The patent inverts the conventional approach by imaging components from the upper surface rather than the lower surface when characteristic sections are present. This inversion allows direct detection of the characteristic section position, enabling accurate correction for components where the upper surface features are the critical mounting reference.
2Manufacturing precision
If calibration is performed using chip components with characteristic sections at offset positions, then the calibration process becomes more complex, but mounting accuracy for such components cannot be achieved
Solution Approach 1:
The patent segments the calibration and correction process into distinct workflows based on component type. A determination step first identifies whether a component has characteristic sections on its upper surface, then directs the process to the appropriate correction method. This segmentation simplifies the overall system by providing clear decision paths and avoiding unnecessary complexity in handling component types that don't require special correction.
3Ease of operation
If a single correction method is used for all component types, then the system is simpler to operate, but mounting accuracy varies by component type
Solution Approach 1:
The system performs self-identification of component types through automated detection of characteristic sections on upper surfaces. The control device automatically determines whether to apply upper surface-based or lower surface-based correction methods without requiring manual intervention or complex user input. This self-service approach maintains operational simplicity while achieving high precision for different component types.
Data Source
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AI summary
A dedicated correction value related to the mounting position of an upper surface recognition component with a characteristic section on an upper surface thereof is memorized in correction value folder 43a of an HDD, and when performing mounting work of mounting the upper surface recognition component on a board, a position deviation amount of the characteristic section is acquired based on an image of the upper surface of the upper surface recognition component captured by a mark camera, and the component is mounted at the mounting position based on the acquired position deviation amount and the dedicated correction value. Accordingly, it is possible to mount the specific component at a corrected mounting position such that the position of the characteristic section is appropriate, thereby improving mounting accuracy for the upper surface recognition component.