Electronic Circuit Component Mounting System Damage Detection
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Solution Overview
Problem
Existing component mounting systems risk damaging electronic circuit components during the mounting process due to the brittleness of hard and thin materials used in miniaturized circuits, and current detection and prevention technologies are inadequate, especially for component-embedded and multi-layer printed circuit boards.
Innovation Solution
An electronic circuit component mounting system that includes a damage detecting device with a reaction force detecting section and a damage determining section to identify component damage by monitoring changes in reaction force during contact, and an operation parameter acquiring section to adjust parameters for optimal mounting, reducing the risk of damage and improving manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the component holding tool is lowered to contact the component or mounting target member, then mounting operation can be performed, but the component may be damaged due to contact force
Solution Approach 1:
The patent applies beforehand cushioning by introducing a cushioning member (such as a rubber cushion or elastic element) between the component holding tool and the component, or between the component and mounting target member. This cushioning member absorbs impact forces during contact, preventing damage to the component while still allowing the mounting operation to proceed efficiently. The cushioning effect is built into the system before the actual mounting occurs.
Solution Approach 2:
The patent uses an intermediary approach by introducing a cushioning member as a mediator between the component holding tool and the component. This intermediary element transmits the necessary contact force for mounting while filtering out harmful impact forces. The cushioning member acts as a buffer that allows force transmission without direct hard contact, thus preventing component damage.
2Object-affected harmful factors
If the lowering speed of the component holding tool is decreased to suppress contact force, then component damage is reduced, but manufacturing efficiency is suppressed
Solution Approach 1:
By incorporating a cushioning member into the system, the patent eliminates the need to reduce lowering speed to prevent damage. The cushioning member absorbs impact forces regardless of the lowering speed, allowing the system to maintain high manufacturing efficiency while still protecting components from damage. This resolves the contradiction by providing damage protection through a mechanical cushioning mechanism rather than through speed control.
3Measurement precision
If a reaction force detecting section is added to detect component damage, then damage detection capability is improved, but device complexity increases
Solution Approach 1:
The cushioning member serves a dual function: it both protects the component from damage and enables damage detection. By monitoring the reaction force or characteristics of the cushioning member during mounting, the system can detect whether a component is damaged without requiring separate complex detection equipment. The cushioning member essentially reports component status through its mechanical response.
Solution Approach 2:
The cushioning member is designed to perform multiple functions simultaneously: it cushions against impact forces to prevent damage, and it also serves as a sensing element that provides information about component integrity through reaction force measurements. This multi-functionality reduces the need for separate detection devices, thereby limiting the increase in system complexity.
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
The system effectively detects and prevents component damage during mounting, allowing for immediate action to stop the process and reduce waste, especially in the manufacture of component-embedded and stacked printed circuit boards, while optimizing operation parameters to minimize damage and enhance manufacturing efficiency.
Implementation Method 1
a reaction force detecting section which detects a reaction force against the component holding tool in at least one of when the component holding tool contacts the electronic circuit component, and when the electronic circuit component held by the component holding tool contacts the mounting target member
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A decrease of working performance performed by an electronic circuit component mounting machine can be avoided as far as possible while damage to an electronic circuit component can be prevented. In the electronic circuit component mounting machine, a suction nozzle is lowered by a first linear motor and a second linear motor 120 by two stages, and a drive circuit 154 of the second linear motor 120 includes a reaction force detecting section 158 and a damage detecting section 160 that detects damage of an electronic circuit component. In addition, a controller 152 that controls the drive circuit 154 includes an appropriate operation parameter determining section 168 that determines an appropriate value of an operation parameter of the second linear motor 120 using the reaction force detecting section 158 and the damage detecting section 160. The second linear motor 120 is controlled by the appropriate operation parameter which is determined by the appropriate operation parameter determining section 168, and thus a decrease of working performance can be avoided as far as possible while damage to the electronic circuit component can be prevented.