Nozzle Tip Deviation Compensation in Component Mounting
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Solution Overview
Problem
In component mounting apparatuses, deviations in nozzle tip position due to off-center pressing can lead to instability in positioning accuracy, making it difficult to accurately suck and mount components.
Innovation Solution
The apparatus measures and accounts for deviation in nozzle tip position before and after pressing down, using this data to adjust the mounting head's control for precise component placement, even when nozzles are exchanged or at different angles, ensuring accurate suction and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the nozzle lifting and lowering mechanism presses down the flange at a position offset from the central axis of the nozzle, then the nozzle can be moved downward to contact the component, but the nozzle tip position deviates between before and after pressing down, causing instability in positioning accuracy
Solution Approach 1:
The control device measures in advance the deviation amount between the nozzle tip position before pressing down and after pressing down. This preliminary measurement of the deviation allows the system to compensate for the positioning error in subsequent operations, ensuring accurate component suction and mounting despite the off-center pressing action
Solution Approach 2:
The control device adjusts the nozzle tip position parameters by incorporating the measured deviation amount into the positioning calculations. By changing the position parameters based on the deviation data, the system maintains accurate component placement even when the nozzle is pressed down at an offset position
2Force
If the nozzle is pressed downward by the nozzle lifting and lowering mechanism, then the nozzle contacts the component for suction, but the moment of force generated due to offset pressing causes the nozzle to incline with respect to the central axis
Solution Approach 1:
The control device uses feedback from the measured nozzle tip position deviation to adjust and compensate for the nozzle inclination. By continuously monitoring the position change and incorporating this information into the control calculations, the system maintains stable and accurate nozzle orientation during the pressing and suction operations
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 solution enhances suction and mounting position accuracy by compensating for deviations, maintaining precision across nozzle exchanges and varying moments of force, thereby improving overall component placement reliability.
Implementation Method 1
an elastic body that elastically supports the nozzle
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A component mounting apparatus 10 is provided with a controller that controls a mounting head. The mounting head is provided with a nozzle holder 30, a nozzle 42 that is elastically supported to be movable up and down with respect to the nozzle holder 30, a flange 42c that is provided at a position that is offset from the central axis of the nozzle 42, and a second engaging section 52 that is able to move the nozzle 42 downward by engaging with the flange 42c and pressing down the flange 42c against the elastic force of a nozzle spring 46. The controller measures in advance the deviation amount of the tip position of the nozzle 42 between before and after the second engaging section 52 moves the nozzle 42 downward, and controls the mounting head so as to suck the component and mount the component on the board taking the deviation amount into account.