Component Mounting Nozzle Distance Detection for Board Curling
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Solution Overview
Problem
The challenge is to prevent damage to electronic components during high-speed mounting on boards, particularly due to board curling, which can cause excessive pressure and accuracy issues, while maintaining productivity in an automated system.
Innovation Solution
A distance detector is used to optically measure the distance between the component and the board, allowing for adjustment of the nozzle's acceleration and position to prevent damage and ensure accurate mounting, even on curled boards, by controlling the nozzle's velocity and position based on real-time height measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the driving shaft operates at high speed to increase productivity, then productivity is improved, but the electronic component may be damaged due to excessive pressure
Solution Approach 1:
The system performs preliminary measurement of the board's height and curling degree before the component mounting operation. By detecting the board surface state in advance and adjusting the nozzle position and pressing force accordingly, the system prevents component damage while maintaining high-speed operation capability
Solution Approach 2:
The system implements feedback control by continuously monitoring the board's height and curling degree, then automatically adjusting the nozzle position and pressing force in real-time based on the detected board state, ensuring consistent mounting quality at high speeds
2Productivity
If the board curling is not considered during component mounting, then productivity is maintained, but excessive pressure is applied causing component damage
Solution Approach 1:
The system dynamically changes the mounting parameters (nozzle position, pressing force, approach speed) based on the detected board curling degree and height variations, allowing high-speed mounting while adapting to board deformations to prevent excessive pressure on components
3Reliability
If the entire board height is measured for each board before production run, then component damage is prevented, but inspection time is added lowering productivity
Solution Approach 1:
The system extracts only the critical measurement information needed for damage prevention (board height and curling degree at the mounting location) rather than measuring the entire board, enabling rapid detection without adding significant inspection time to the production process
Solution Approach 2:
The system replaces comprehensive mechanical board inspection with targeted optical or sensor-based height detection, dramatically reducing measurement time while maintaining sufficient accuracy for preventing component damage during mounting
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 effectively prevents component damage and maintains high productivity by accurately positioning components on curled boards without the need for additional inspection time, ensuring high-speed and high-accuracy mounting.
Implementation Method 1
a distance detector for optically obtaining a distance between a component that is held and a board
Data Source
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AI summary
In a conventional technique, before a production run of mounting a component on a board (component mounting), a height of the entire board is measured for each board. Because of an inspection for each board, a time for the inspection is needed as well as a production time, leading to degradation of productivity. The present invention provides a component mounting apparatus having a feature in which the component mounting apparatus includes a component mounting unit including a nozzle and a distance detector for optically detecting a distance between a component held by the mounting nozzle and a board, and an illuminated region formed by the distance detector is located in a vicinity of a portion obtained by projecting the mounting nozzle onto the board.