Component Mounting Paste Height Recognition via Sidewall Reference
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Solution Overview
Problem
In component mounting machines, measuring the height of the container's bottom face after a coating film is formed is challenging, as the initial empty state height is required for accurate film thickness calculation.
Innovation Solution
A component mounting machine equipped with a head, a height sensor, and a control device that measures the height of a predetermined measurement point on the container, allowing recognition of the container's bottom face height and coating film surface height, regardless of the film's presence, to ensure proper positioning and transfer of the coating film to connection terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the height of the bottom face of the container is measured in advance in an empty state, then the film thickness can be calculated accurately, but the measurement cannot be performed after the coating film is formed
Solution Approach 1:
The patent applies preliminary action by measuring the height of a reference position on the container before the coating film is formed. This preliminary measurement is stored and used later to calculate film thickness by comparing with post-coating measurements, eliminating the need for immediate post-coating bottom face measurement.
Solution Approach 2:
The patent introduces a reference position (intermediary element) on the container as a mediator for height measurement. By measuring the height of this reference position both before and after coating, the system can indirectly determine film thickness without directly measuring the bottom face after coating is applied.
2Ease of operation
If the height measurement is performed after the coating film is formed, then the measurement can be done in the actual working state, but the bottom face height cannot be directly measured
Solution Approach 1:
The patent creates a copy of the bottom face height information by measuring and storing the height of a reference position on the container before coating. This copied height data is then used to reconstruct the bottom face height information after coating, allowing the system to operate in the actual working state while retaining access to bottom face height data.
3Manufacturing precision
If the container height varies or positioning is improper, then the coating film transfer may be inaccurate, but continuous production requires efficiency
Solution Approach 1:
The patent implements feedback by measuring the height of the reference position on the container and using this information to adjust or verify the coating film transfer process. This feedback mechanism ensures accurate film transfer even when container height varies or positioning is improper, while maintaining production efficiency through automated compensation.
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
Enables accurate recognition of the container's bottom face and coating film height, ensuring reliable transfer of the film to components and providing warnings for improper positioning, thus maintaining consistent film application despite changes in container height or film thickness.
Implementation Method 1
a height sensor provided on the head and capable of measuring the height of the measurement point of the container
Data Source
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AI summary
Component mounting machine 10 includes head 18, a device for moving head 18 (i.e., X-axis slider 20 and Y-axis slider 24), transfer unit 50, and a mounting controller. Circular plate 51 is an example of a container in which paste is placed. The bottom face of circular plate 51 and the upper surface of the side wall have a predetermined height relationship. Height sensor 35 is disposed on the lower face of head 18. Height sensor 35 measures the height of the upper surface of the side wall of circular plate 51, which is a measurement point. The mounting controller recognizes the height of the bottom face of circular plate 51 or the height of the surface of coating film 55 disposed on circular plate 51 from the height of the top surface of the side wall of circular plate 51 measured by height sensor 35.