Mobile Robot Workcell Layout for Smooth Workpiece Alignment
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Solution Overview
Problem
The existing robot system described in Japanese Patent Application Publication No. 2019-058954 faces challenges in smoothly performing workpiece operations due to the distance between the movable stand with the robot and the working stand, making it difficult to adjust the robot's motion and maintain alignment.
Innovation Solution
A robot system with a movable stand that mounts both a robot and a working machine, featuring a gripper and recognizers to recognize workpiece states at different placement regions, allowing controlled processes such as gripping, moving, and placing workpieces to ensure smooth alignment and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the robot and working machine are mounted on separate stands, then the system structure is simpler, but the workpiece operation becomes difficult to perform smoothly due to distance and alignment issues
Solution Approach 1:
The robot and working machine are mounted on the same movable stand, merging two previously separate systems into one integrated platform. This combination allows the robot arm to freely access the working machine's processing area without the constraints of inter-stand distance, enabling smooth workpiece operations while maintaining relatively simple system structure.
2Ease of operation
If the robot and working machine are mounted on the same movable stand, then workpiece operation becomes smooth, but the device complexity increases
Solution Approach 1:
By mounting both the robot and working machine on a single movable stand, the system achieves smooth workpiece operations through integrated positioning. The movable stand serves as a common platform that coordinates the movements of both components, reducing the need for complex inter-stand coordination mechanisms.
Solution Approach 2:
The movable stand performs multiple functions: it supports the robot, supports the working machine, and provides a unified moving platform that coordinates both components. This multi-functionality reduces overall system complexity compared to having separate stands with additional coordination mechanisms.
3Adaptability or versatility
If the robot arm moves freely to access workpiece, then operational flexibility is improved, but positional alignment precision deteriorates
Solution Approach 1:
The robot and working machine share a common movable stand, which provides a unified reference frame for positioning. When the movable stand moves, both components move together, maintaining their relative positions and ensuring that the robot arm can access the working area while preserving alignment precision through coordinated movement.
Solution Approach 2:
The system uses recognition devices to detect workpiece positions and provides feedback to the control unit, which then adjusts the robot arm's movements and the movable stand's position to achieve precise alignment. This closed-loop control ensures both operational flexibility and positioning accuracy.
Data Source
AI summary
A robot system may include a movable stand; a robot mounted on the movable stand; a working machine mounted on the movable stand at a different position from the robot; a first placement region at which a workpiece is placed before the working machine works on the workpiece; and a second placement region at which the workpiece is placed after the working machine has worked on the workpiece. The robot may include a gripper for gripping the workpiece; a first recognizer for recognizing a state of the workpiece at the first placement region; and a second recognizer for recognizing a state of the second placement region.