Component Mounting Machine Positive Pressure Release Control
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Solution Overview
Problem
Existing component mounting machines face reliability issues due to inconsistent positive pressure release, leading to components being either not released or improperly mounted on circuit boards, caused by varying component shapes, sizes, and weights, as well as potential static electricity issues.
Innovation Solution
A component mounting machine equipped with an electropneumatic proportional valve and an electromagnetic valve, controlled by a system that adjusts positive pressure output based on component-specific data to ensure accurate release, using a pressure sensor for real-time adjustments and command value corrections to prevent defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant positive pressure is supplied to the suction nozzle from the positive pressure source, then the structure is simple, but the component cannot be released properly or the mounting position shifts due to insufficient or excessive pressure
Solution Approach 1:
The patent applies dynamics by making the positive pressure adjustable rather than constant. The electropneumatic proportional valve dynamically adjusts the positive pressure based on component characteristics (size, shape, weight) stored in the storage unit, allowing the pressure to adapt to different component types while maintaining reliable release without causing mounting position shifts
Solution Approach 2:
The patent changes the pressure parameter dynamically based on component characteristics. Different positive pressure values are supplied according to the specific component being handled, optimizing the release process for each component type while preventing both insufficient release and excessive pressure effects
2Reliability
If positive pressure is increased to ensure component release, then release reliability improves, but the mounting position of peripheral components shifts due to excessive pressure
Solution Approach 1:
The patent applies local quality by providing different positive pressure levels for different component types. Each component receives a customized pressure level based on its characteristics, ensuring adequate release pressure for that specific component while preventing excessive pressure from affecting peripheral components and their mounting positions
3Reliability
If component-specific positive pressure control is implemented, then release reliability for all component types improves, but the control system becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-storing component characteristics (size, shape, weight) and corresponding positive pressure values in the storage unit before the actual mounting process. This allows the control unit to quickly retrieve and apply the appropriate pressure for each component type without complex real-time calculations, reducing control system complexity while maintaining high reliability
Solution Approach 2:
The patent replaces a potentially complex mechanical pressure adjustment system with an electropneumatic proportional valve controlled by electronic signals. The control unit electronically selects and adjusts pressure based on stored component data, substituting mechanical complexity with electronic control that is more precise and easier to manage
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 solution ensures precise positive pressure adjustment for each component, preventing defects and improving mounting reliability, while allowing for efficient management of positive pressure command values and real-time system corrections, thus enhancing the overall mounting process.
Implementation Method 1
an electropneumatic proportional valve which adjusts the positive pressure supplied to the suction nozzle from the positive pressure source
Implementation Method 2
a suction nozzle which sucks the component by negative pressure
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A negative pressure supply system 26 which supplies negative pressure from a negative pressure source 25 and a positive pressure supply system 28 which supplies positive pressure from a positive pressure source 27 are connected to a suction nozzle 17. In the positive pressure supply system 28, an electropneumatic proportional valve 30 which adjusts the positive pressure supplied to the suction nozzle 17 and an electromagnetic valve 32 which opens and closes a positive pressure supply path 31 between the electropneumatic proportional valve 30 and the suction nozzle 17 are provided. A positive pressure command value which is appropriate for releasing a component 18 is registered in component data, and a control device 35 of a component mounting machine obtains the positive pressure command value to be used in releasing the component 18 suctioned to the suction nozzle 17, and adjusts output positive pressure of the electropneumatic proportional valve 30 by outputting the positive pressure command value to the electropneumatic proportional valve 30, with reference to the component data of the component 18 suctioned to the suction nozzle 17.