Painting Head Vibration Control for Gap-Free Robot Coating
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Solution Overview
Problem
Existing painting robots experience reduced painting quality due to insufficient paint supply, leading to issues like gaps and blurring, and existing solutions to stabilize paint pressure require time, thereby reducing painting productivity.
Innovation Solution
A painting robot with a painting head and robot arm that applies supply vibration through instant direction-switching controls and inertial forces to ensure consistent paint supply, preventing gaps and blurring without delaying the painting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the speed of movement of the painting head is reduced before the start of painting and pressure ranges are maintained, then painting quality is improved, but painting rate decreases
Solution Approach 1:
The patent applies preliminary action by performing vibration application to the painting head before painting starts. The arm control unit controls the robot arm to apply vibration in the paint supply direction to the painting head before the painting head reaches the painting position, ensuring paint is properly supplied to the internal flow path in advance without requiring speed reduction during the actual painting process.
Solution Approach 2:
The patent utilizes mechanical vibration by causing the robot arm to vibrate in the paint supply direction before painting begins. This vibration promotes paint flow into the internal flow path of the painting head, ensuring sufficient paint supply and preventing painting defects without needing to reduce movement speed during painting.
2Manufacturing precision
If time is taken to limit fluctuations in paint pressure, then painting quality is improved, but painting productivity decreases
Solution Approach 1:
The patent performs the pressure stabilization action in advance by applying vibration to the painting head before painting begins. The arm control unit controls vibration application during the movement to the painting position, so that by the time painting starts, paint pressure fluctuations have already been limited and paint is properly supplied to the internal flow path.
Solution Approach 2:
The patent applies dynamics by using dynamic vibration control during the movement phase. The arm control unit dynamically adjusts the robot arm to generate vibration in the paint supply direction, creating conditions that promote paint flow and stabilize pressure before the painting process begins, eliminating the need for separate pressure stabilization time.
3Quantity of substance
If vibration is applied to the painting head before painting, then paint supply is improved, but additional control complexity is introduced
Solution Approach 1:
The patent achieves multi-functionality by using the robot arm for both its primary function of positioning the painting head and an additional function of applying vibration to the painting head. The arm control unit controls the robot arm to perform both positioning and vibration generation, eliminating the need for a separate vibration generation device and reducing overall system complexity.
Solution Approach 2:
The patent applies self-service by having the robot arm serve itself by generating vibration during its movement. The arm control unit utilizes the robot arm's movement to generate vibration in the paint supply direction, allowing the system to improve paint supply without adding external vibration generation components or complex control systems.
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
Improves painting quality and productivity by ensuring consistent paint supply to the painting head, eliminating gaps and blurring, and maintaining efficient operation without the need to stabilize pressure fluctuations.
Implementation Method 1
an arm control unit for controlling operation of the robot arm, the arm control unit controlling operation of the robot arm so that supply vibration for supplying the paint to the internal flow path is applied to the painting head
Implementation Method 2
supply vibration for supplying the paint to the internal flow path is applied to the painting head before the painting area is painted
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
[Problem] To provide a painting robot capable of improving painting productivity while also improving painting quality. [Solution] A painting robot (1) paints a painting area of a vehicle body (FR), and comprises: a painting head (30) having a plurality of nozzles (32) for ejecting drops of paint supplied from an external supply path via an internal flow path (35); a robot arm (10) which has the painting head (30) mounted on a tip end thereof and causes the painting head (30) to move to a desired position; and an arm control unit (42) for controlling operation of the robot arm (10), the arm control unit (42) controlling operation of the robot arm (10) so that supply vibration for supplying the paint to the internal flow path (35) is applied to the painting head (30) before the painting area is painted.