Painting Robot Pressure Stabilization via Pneumatic Regulator
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Solution Overview
Problem
Existing painting robots face issues with pressure fluctuations affecting the stable discharge of paint, and they are not compatible with air-operated paint regulators (AOPR) due to differing pressure ranges.
Innovation Solution
A painting robot design that includes a painting head with a piezoelectric substrate, a robot arm, and a paint supply mechanism with a pneumatic control valve and a pressure boosting mechanism, such as an orifice, to stabilize paint pressure and enable use with AOPR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a proportional valve is used to control paint pressure, then electrical control is achieved, but pressure fluctuations occur affecting stable paint discharge
Solution Approach 1:
The patent introduces an air-operated paint regulator (AOPR) as an intermediary device between the paint supply system and the painting head. The AOPR uses compressed air pressure to control the paint flow, replacing the electrical proportional valve. This intermediary mechanism translates air pressure control into stable paint pressure regulation, eliminating the pressure fluctuations that occurred with direct electrical control while maintaining operational control capability.
Solution Approach 2:
The patent replaces the electrical proportional valve system with a pneumatic AOPR system. By substituting the electrical control mechanism with a pneumatic one, the system achieves more stable pressure control for paint discharge. The AOPR uses air pressure actuation to regulate paint flow, providing mechanical stability that electrical valves cannot achieve, thereby resolving the contradiction between electrical control ease and discharge stability.
2Reliability
If an air-operated paint regulator (AOPR) is used to achieve explosion-proofing, then electrical devices are eliminated, but the operable pressure range becomes too high for existing systems
Solution Approach 1:
The patent segments the pressure control function into two distinct stages: first, a pressure boosting mechanism (orifice) increases the paint pressure to a level suitable for AOPR operation; second, the AOPR regulates the pressure at its required operating range. This segmentation allows the system to accommodate the AOPR's higher pressure requirements while maintaining compatibility with the painting head's operational needs, thus resolving the pressure range incompatibility issue.
Solution Approach 2:
The patent implements preliminary pressure boosting through an orifice before the paint reaches the AOPR. This preliminary action ensures that the paint pressure is already at the appropriate level for AOPR operation, preventing the system from encountering pressure range incompatibility issues. By preparing the paint pressure in advance, the system can successfully integrate the explosion-proof AOPR without modification to its fundamental operating parameters.
3Adaptability or versatility
If pressure boosting is implemented to enable AOPR operation, then AOPR compatibility is achieved, but additional components increase system complexity
Solution Approach 1:
The patent designs the orifice to serve multiple functions: it acts as a pressure boosting mechanism to enable AOPR operation, functions as a flow restrictor to control paint flow rate, and can be integrated into the existing paint supply channel structure. By making the pressure boosting component multi-functional, the system achieves AOPR compatibility without proportionally increasing complexity, as the same component performs multiple critical roles in the paint delivery system.
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 reduces the impact of pressure fluctuations, ensures a stable paint discharge, and allows the use of AOPR, making the painting robot suitable for explosion-proof environments.
Implementation Method 1
a painting head that is provided with a piezoelectric substrate that may be driven to eject the droplets from the nozzles
Implementation Method 2
a pressure boosting mechanism that has been installed on the downstream side of the paint supply channel facing the painting head side from the pneumatic control valve or on the upstream side of the pneumatic control valve and that will increase the pressure of the paint that may be supplied to the pneumatic control valve
Data Source
AI summary
A painting robot is provided with painting head unit that has a plurality of nozzles to eject droplets and painting head that is provided with piezoelectric substrate to eject the droplets from nozzles, robot arm to move said painting head unit to a desired position, and paint supply mechanism that may be installed between robot arm and painting head unit. Also, paint supply mechanism is provided with paint supply channel to provide paint towards painting head, return flow channel to recover paint that was not discharged from nozzle, an air-operated paint regulator that has been installed in paint supply channel for which the valve opening position can be adjusted in response to the controlled air pressure, and orifice that has been installed on the downstream side of paint supply channel facing painting head side.