Offline Robot Teaching for Welding-Inspection Point Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing offline teaching devices face challenges in efficiently correcting teaching points for different robots due to positional deviations in workpieces, which require manual intervention and are time-consuming, especially when the robots performing welding and inspection are different.
Innovation Solution
An offline teaching system that includes a welding robot control device and an inspection robot control device, which acquire and calculate positional deviations, convert and correct teaching points in both welding and inspection programs, allowing for efficient position adjustments based on the relative positions of workpieces and robots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual correction of teaching points is performed for different robots, then position adjustments can be made, but time consumption and manual intervention increase significantly
Solution Approach 1:
The patent creates a digital model (copy) of the workpiece and uses it to generate teaching points automatically. The offline teaching device acquires actual workpiece data, creates a digital replica, and uses this copy to calculate and adjust teaching points for multiple robots without manual intervention, thereby reducing time while maintaining precision
Solution Approach 2:
The system automatically changes position parameters of teaching points by calculating deviations between the digital model and actual workpiece measurements. The control unit modifies teaching point coordinates based on measured positional deviations, enabling automatic precision adjustment without manual time consumption
2Adaptability or versatility
If separate teaching programs are created for welding and inspection robots, then each robot can be optimized, but the complexity of managing multiple programs increases
Solution Approach 1:
The offline teaching device serves multiple functions: it creates and manages teaching programs for both welding and inspection robots, performs workpiece measurement, generates digital models, and automatically adjusts teaching points for different robot types. This universal system reduces program management complexity while maintaining optimization capabilities for each robot
Solution Approach 2:
The patent merges the teaching program creation processes for welding and inspection robots into a single integrated system. The control unit generates and manages teaching programs for multiple robots simultaneously using a unified digital model, combining previously separate processes into one cohesive workflow that reduces complexity
3Measurement precision
If position detection commands are increased to improve accuracy, then workpiece positioning improves, but the number of commands and program complexity increase
Solution Approach 1:
The patent replaces multiple mechanical position detection commands with a digital measurement system. Instead of using numerous sensor commands during robot operation, the system performs comprehensive workpiece measurement beforehand, creates a digital model, and uses this model to guide robot positioning, thereby achieving high precision with fewer real-time commands
Data Source
AI summary
An offline teaching device includes a memory storing a program, and a processor configured to execute the program stored in the memory. The processor is configured to acquire, from an inspection robot that inspects a workpiece to be produced by welding, information on positions of the workpiece and a welding robot that executes the welding, calculate a position of the workpiece and a position of the welding robot, convert a position of the workpiece with respect to the inspection robot into a position of the workpiece with respect to the welding robot, correct a position of a teaching point included in a welding teaching program used for the welding and correct a position of a teaching point included in an inspection teaching program used for the inspection of the produced workpiece, and output the corrected welding teaching program.