Robot Parameter Adjustment for Welding Speed and Position Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Industrial robots often fail to achieve desired performance in actual field applications due to pre-defined operation modes not accounting for user-specific conditions such as tool weight and attitude, leading to suboptimal performance in specific operations.
Innovation Solution
A robot system with a controller that automatically adjusts operation parameters based on acquired application and operation area data, using an adjustment operation creating unit and parameter adjustment unit to optimize performance parameters like servo gain and acceleration/deceleration time constants, ensuring required performance is met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-defined operation modes are used for different applications, then the robot can provide specialized performance for specific tasks, but the performance deteriorates when user-specific conditions (tool weight, attitude, actual operations) differ from manufacturer assumptions
Solution Approach 1:
The patent implements dynamic adjustment of operation parameters based on actual user conditions. The system automatically detects tool weight and attitude, then dynamically modifies servo gains and operation parameters in real-time, transitioning from static pre-defined modes to adaptive dynamic parameter adjustment that responds to actual operating conditions
Solution Approach 2:
The system changes physical parameters (servo gains, acceleration/deceleration time constants, operation speeds) based on detected actual conditions. By monitoring tool weight, attitude, and operation characteristics, the system automatically adjusts these parameters to optimize performance for the specific application, resolving the contradiction between pre-defined performance and actual field conditions
2Ease of operation
If operation parameters are adjusted manually based on manufacturer determination, then the setup process is simple, but the positioning accuracy and operation performance deteriorate when actual field conditions differ from manufacturer assumptions
Solution Approach 1:
The system performs self-adjustment of operation parameters by automatically detecting tool weight, arm attitude, and operation characteristics, then autonomously optimizing servo gains and operation parameters without requiring manual intervention. This self-service capability maintains ease of operation while achieving high positioning accuracy adapted to actual field conditions
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring actual operation conditions (tool weight, arm attitude, vibration levels) and using this information to automatically adjust operation parameters. This closed-loop feedback ensures positioning accuracy is maintained despite variations in user-specific conditions
3Productivity
If fixed operation modes are used for high-speed operations, then productivity increases, but vibration suppression performance deteriorates at welding points requiring high-accuracy positioning
Solution Approach 1:
The system applies periodic variation to operation parameters based on the operation cycle. High-speed parameters are used during air-cut transitions to maximize productivity, while high-precision parameters with enhanced vibration suppression are automatically applied during welding operations. This periodic switching of parameter sets optimizes both speed and precision at appropriate moments
Data Source
AI summary
A robot system that performs desired processing on a processing target object using a processing tool. The robot system includes a robot having an arm tip that holds the processing tool, a position detector that detects a position of the arm tip, and a robot controller that controls an operation of the robot based on a position command and a position feedback detected by the position detector. The robot controller includes an adjustment operation creating unit that, during adjustment of operation parameters for controlling the operation of the robot, acquires an application and an operation area of the robot and automatically creates an adjustment operation corresponding to the acquired application and the operation area and a parameter adjustment unit that automatically adjusts the operation parameters during execution of the adjustment operation created by the adjustment operation creating unit so that a performance required for the application is satisfied.