Robot Fastening Control with Auto Parameter and Force Adjustment
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Solution Overview
Problem
Existing screw fastening robots face inefficiencies and inaccuracies when handling multiple types of bolts, requiring time-consuming parameter adjustments and manual socket replacements, and struggle to accurately control force magnitude and direction.
Innovation Solution
A robot controller system equipped with a storage unit, acquisition unit, setting unit, and control unit that utilizes a fastener recognition sensor and force sensor to automatically adjust parameters for precise screw fastening based on bolt type and position, enabling automatic socket selection and force control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual parameter adjustment and socket replacement are performed for different bolt types, then the robot can adapt to various fastening tasks, but time and effort are required for processing, causing non-efficiency in the production line
Solution Approach 1:
The robot system automatically recognizes bolt types using sensors and autonomously adjusts fastening parameters and selects appropriate sockets without manual intervention. The control unit retrieves pre-stored parameter sets corresponding to recognized bolt types, enabling the system to serve itself in adapting to different fastening tasks while maintaining high productivity
Solution Approach 2:
Parameter sets for multiple bolt types are pre-stored in the storage unit before production operations begin. When a bolt type is recognized, the control unit quickly retrieves the corresponding pre-prepared parameters, eliminating the need for real-time manual adjustment and enabling seamless transitions between different fastening tasks
2Adaptability or versatility
If manual parameter adjustment is performed for different bolt types, then the robot can perform fastening work on various bolts, but it is difficult to control the magnitude and direction of force applied to each bolt, reducing fastening accuracy
Solution Approach 1:
The force sensor detects the actual fastening force applied to the bolt during operation and feeds this information back to the control unit. The control unit compares the detected force with the target force from the parameter set and automatically adjusts the robot's output force to maintain precise control over the magnitude and direction of applied force, ensuring accurate fastening across different bolt types
Solution Approach 2:
The robot system autonomously controls the magnitude and direction of fastening force by retrieving pre-configured parameter sets that include force control data specific to each bolt type. The system self-regulates the fastening process without manual intervention, maintaining consistent fastening quality across varying bolt specifications
Data Source
AI summary
Provided is a robot control device with which it is possible to efficiently and highly accurately perform fastening work using a fastener. The robot control device controls a robot and causes the robot to perform fastening work using a fastener, and is provided with a storage unit, an acquisition unit, a setting unit, and a control unit. The storage unit stores, in association with each other, information about fasteners and a parameter with regards to carrying out fastening work. The acquisition unit acquires, on the basis of output of a fastener recognition sensor, information about a fastener with which fastening work is to be performed. A setting unit acquires, on the basis of the acquired information about the fastener, the parameter associated with the information about the fastener from the storage unit, and sets the parameter. The control unit controls the robot on the basis of the set parameter.