Component Mounting Machine Pre-Post Inspection Logic
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Solution Overview
Problem
Existing component mounting machines require time-consuming detection of defective products after each mounting operation, leading to decreased productivity and increased size and cost due to the need for dedicated video cameras or recorders.
Innovation Solution
A component mounting machine with a head having a holding member to hold components and a control device that performs pre-mounting inspections to determine component normality, and conducts post-mounting inspections when abnormality is detected or suspected, thereby reducing the need for extensive post-processing inspections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If post-mounting inspection is performed on all components, then detection accuracy of defective products is improved, but productivity deteriorates due to time consumption
Solution Approach 1:
The patent applies partial inspection by performing post-mounting inspection only on components that showed abnormality or abnormality suspicion in pre-mounting inspection, rather than inspecting all components. This selective approach reduces inspection time and maintains productivity while still achieving high detection accuracy for defective products through targeted inspection of suspicious cases
2Measurement precision
If dedicated video camera and video recorder are used for mounting state confirmation, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the imaging device multi-functional by using it for both pre-mounting inspection (to detect component abnormalities before mounting) and post-mounting inspection (to confirm mounting state). This eliminates the need for separate dedicated video cameras and recorders, reducing device complexity and cost while maintaining detection accuracy through the same imaging system
Solution Approach 2:
The patent extracts the inspection function from a dedicated inspection system and integrates it into the existing imaging device used for mounting operations. By removing the need for separate inspection equipment and utilizing the existing imaging capabilities, the system reduces complexity while maintaining the ability to detect mounting defects accurately
Data Source
AI summary
A component mounting machine includes a head having a holding member configured to hold the component, and a control device. The control device performs a pre-mounting inspection for inspecting a state of a component held in the holding member, and controls the head so that the component held in the holding member is mounted on the board in a case where a determination of normality is made in the pre-mounting inspection. In addition, the control device performs a post-mounting inspection for inspecting a state of the component already mounted on the board by the head in a case where a determination of abnormality is made in the pre-mounting inspection or in a case where a determination of abnormality suspicion is made which is within an allowable range determined to be normal but is suspected to be abnormal in the pre-mounting inspection.