Vehicle Coating Robot Speed Control for Pressure Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coating robots experience pressure fluctuations and vibrations during multi-axis arm operation, leading to unstable coating material supply and variations in coating quality due to acceleration, deceleration, and vibration of the arm, affecting the landing position and quality of the coating on vehicle bodies.
Innovation Solution
A robot with a coating head and supply device that controls pressure fluctuations by adjusting movement speeds and temporarily stopping at specific positions during the coating process, using a circulation path with detection means for pressure control, ensuring stable coating material supply and reduced vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coating head moves at constant high speed during coating operation, then productivity is improved, but pressure fluctuations and vibrations occur causing coating quality deterioration
Solution Approach 1:
The coating head performs periodic acceleration and deceleration movements during the coating process. Specifically, the coating head is accelerated before reaching the coating start position and decelerated after passing it, creating a periodic motion pattern that counteracts harmful vibrations and pressure fluctuations while maintaining overall high productivity
Solution Approach 2:
The movement parameters of the coating head are dynamically changed during operation. The control means adjusts the speed and acceleration parameters based on the coating head's position relative to the coating start position, changing from constant high speed to variable speed with controlled acceleration and deceleration phases to eliminate vibrations and pressure fluctuations
2Measurement precision
If the multi-axis arm operates with acceleration and deceleration during movement, then positioning accuracy is improved, but pressure fluctuations occur destabilizing coating material supply
Solution Approach 1:
The control means performs preliminary acceleration and deceleration actions at specific positions before and after the coating start position. By accelerating before reaching the coating area and decelerating after passing it, the system prepares the coating material supply system in advance, allowing pressure to stabilize before coating begins and preventing supply instability during the critical coating phase
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention aims to suppress pressure fluctuations and vibration of the multi-axis arm of a coating robot during its operation, thereby preventing deterioration of coating quality caused by the coating head. Therefore, a robot for coating a vehicle body is provided. The robot has a coating head configured for dispensing a coating material onto the vehicle body, a supply device that has a circulation path for circulating the coating material between a reservoir storing the coating material and the coating head, and that is capable of controlling the pressure of the coating material flowing through the circulation path, and an arm having the coating head and the supply device, and being a robot for coating robot a vehicle body that coats the vehicle body while moving the coating head in a main scanning direction by operation of the arm, wherein it has control means for controlling the movement of the arm, and the coating head moves at a first speed toward a coating start position where the coating of the vehicle body is started by the movement of the arm by the control means, and when the coating head reaches a specific position provided in a movement path to the coating start position, the coating head moves at a second speed different from the first speed.