Suction Nozzle Negative Pressure Control for Component Mounting
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Solution Overview
Problem
Component mounting devices with multiple suction nozzles face issues with negative pressure leakage, leading to decreased component holding force and reduced work efficiency, especially when picking up components with uneven surfaces or at increased moving speeds.
Innovation Solution
A component mounting device equipped with a first negative pressure supply section that maintains negative pressure throughout the pickup and mounting operations, a second negative pressure supply section that supplements pressure when detected as decreasing, and a negative pressure detection and control system to manage pressure values effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single negative pressure supply section is used for multiple suction nozzles, then device complexity is reduced, but negative pressure stability deteriorates due to leakage affecting all nozzles
Solution Approach 1:
The air flow path is divided into multiple independent branched sections, each supplied by a dedicated negative pressure supply section. This segmentation isolates pressure leakage to individual nozzles, preventing propagation to other nozzles while maintaining overall system simplicity.
2Productivity
If the suction nozzle moves at higher speed to increase productivity, then work efficiency improves, but component holding force deteriorates due to inertial forces
Solution Approach 1:
Negative pressure is supplied to the suction nozzle in advance during the pickup operation before high-speed movement begins. This preliminary establishment of strong holding force ensures components can withstand the inertial forces generated during subsequent high-speed positioning and mounting operations.
3Adaptability or versatility
If the suction nozzle picks up components with uneven surfaces or in inclined posture, then adaptability improves, but negative pressure stability deteriorates due to air leakage
Solution Approach 1:
Each suction nozzle is equipped with independent negative pressure supply, allowing local compensation for leakage caused by uneven component surfaces or inclined postures. The branched flow path structure enables isolated maintenance of negative pressure at affected nozzles without impacting others.
4Productivity
If negative pressure is blocked during mounting operation to improve productivity, then mounting speed improves, but component holding force deteriorates
Solution Approach 1:
The negative pressure supply timing is dynamically adjusted based on operational phase: supplied during pickup and movement to ensure holding force, and blocked during mounting operation to enable rapid component release. This dynamic control optimizes both productivity and component handling reliability.
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 effectively maintains negative pressure in suction nozzles, preventing component fallout and increasing holding force, allowing for heavier components to be picked up and mounted efficiently, even at higher speeds.
Implementation Method 1
a first negative pressure supply section that supplies the negative pressure air to the suction nozzle throughout a time band from when the suction nozzle starts the pickup operation to when the suction nozzle starts the mounting operation
Implementation Method 2
a negative pressure detection section that directly or indirectly detects a pressure value of the negative pressure air supplied to the suction nozzle
Implementation Method 3
a second negative pressure supply section that supplies the negative pressure air to the suction nozzle, and a negative pressure supply control section that operates the second negative pressure supply section when the detected pressure value of the negative pressure air is closer to an atmospheric pressure value than a predetermined value
Data Source
AI summary
A component mounting device includes a suction nozzle supplied with negative pressure air to perform pickup operation of a component, and is blocked from the negative pressure air to perform mounting operation of the component on a board, a first negative pressure supply section to supply the negative pressure air when the suction nozzle starts the pickup operation to when the suction nozzle starts the mounting operation, a second negative pressure supply section to supply the negative pressure air, a negative pressure detection section, and a negative pressure supply control section to operate the second negative pressure supply section when the detected pressure value of the negative pressure air is closer to an atmospheric pressure value than a predetermined value set between the atmospheric pressure value and a vacuum value.