Fluid Application System Nozzle Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid application systems face challenges in maintaining a constant line width of applied fluids due to response delays in discharge amount adjustments when nozzle movement speed changes, leading to inefficiencies and increased equipment costs from necessary nozzle replacements.
Innovation Solution
A fluid application system with a control apparatus that adjusts the power source output to match the internal pressure changes of the nozzle, allowing for precise control of discharge amounts to maintain constant line widths, even during changes in nozzle movement speed, thereby suppressing response delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the discharge amount of fluid is adjusted by changing the power source output in accordance with nozzle movement speed changes, then the line width of applied fluid can be maintained constant, but a response delay occurs in the discharge amount adjustment
Solution Approach 1:
The control apparatus calculates a preliminary adjusted output value that accounts for the response delay before actually adjusting the power source output. This preliminary calculation allows the system to compensate for the inherent delay in discharge amount response, ensuring that the fluid discharge rate reaches the target value at the correct time to maintain constant line width during nozzle movement speed changes.
Solution Approach 2:
The control apparatus continuously monitors the relationship between nozzle movement speed and discharge amount, and adjusts the power source output based on this feedback. By calculating the required output adjustment considering the response delay characteristics of the fluid supply apparatus, the system maintains precise control over the discharge amount and ensures consistent line width throughout the application process.
2Productivity
If the nozzle movement speed is changed to improve application efficiency, then productivity increases, but the discharge amount cannot be adjusted promptly due to response delay
Solution Approach 1:
Before changing the nozzle movement speed, the control apparatus calculates the required discharge amount adjustment and determines the preliminary adjusted power source output value that compensates for the expected response delay. This allows the system to maintain reliable discharge amount control even when productivity is improved through faster nozzle movement speed changes.
3Measurement precision
If the power source output is adjusted to compensate for response delay, then the discharge amount control precision is improved, but the control system complexity increases
Solution Approach 1:
The control apparatus implements a feedback mechanism that continuously monitors nozzle movement speed and calculates the required power source output adjustment. By incorporating the response delay compensation calculation into this feedback loop, the system achieves precise discharge amount control without requiring complex additional hardware, maintaining simplicity while improving control precision.
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 maintains constant line widths during fluid application, preventing irregularities at boundaries between thin and thick line parts, and eliminates the need for nozzle replacements, enhancing manufacturing efficiency and reducing costs.
Implementation Method 1
a power source (example: a motor); a fluid supply apparatus (example: a pump, an actuator) that changes the supply amount of the fluid per unit time in accordance with the output of the power source
Implementation Method 2
a nozzle that discharges the fluid supplied from the fluid supply apparatus, to the workpiece
Data Source
AI summary
A fluid application system includes: an application apparatus that discharges a fluid to a workpiece; a movement apparatus that moves the application apparatus and the workpiece; and a control apparatus. At the time of adjusting the output of a power source to thereby vary the discharge amount of the fluid from the nozzle by a target variation amount F1, the control apparatus sets the output of the power source to a value beyond a theoretical output N1 of the power source obtained from the target variation amount F1 of the discharge amount, and then sets the output of the power source to the theoretical output N1 such that the change amount of the internal pressure of the nozzle is coincident with an amount P1 by which the internal pressure of the nozzle needs to change, the amount P1 being obtained from the target variation amount F1 of the discharge amount.