Spot Welding Gun Calibration Using Indentation Depth Feedback
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Solution Overview
Problem
Existing spot welding systems lack the capability to autonomously inspect and calibrate welding quality in real time, leading to potential defects and reduced product reliability due to changes in material or equipment over time.
Innovation Solution
A spot welding gun equipped with a mechanical part for fixing a reference surface and precisely measuring welding indentation depth, along with a system and method for autonomously calibrating welding quality by evaluating indentation depth and dynamic resistance in real time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspection methods are used to check welding quality, then operators can identify welding defects, but human error occurs and product reliability deteriorates
Solution Approach 1:
The patent replaces manual mechanical inspection with an automated measurement system that uses a sensor to detect welding indentation depth and a controller to analyze welding quality. This substitution eliminates human error in inspection while maintaining measurement capability, directly resolving the contradiction between reliability and measurement precision.
2Reliability
If welding quality is not monitored in real time, then production efficiency is maintained, but welding defects occur and product quality deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the sensor continuously measures welding indentation depth and the controller automatically adjusts welding parameters based on real-time measurements. This closed-loop feedback system ensures welding quality consistency without requiring production stoppages for inspection, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent enables continuous welding quality monitoring throughout the production process without interrupting the welding operation. The measurement and control functions operate continuously alongside production, maintaining both quality consistency and production efficiency simultaneously.
3Reliability
If welding conditions are adjusted based on operator experience, then welding quality can be managed, but response time increases and costs rise during quality issues
Solution Approach 1:
The patent implements self-service automation where the controller automatically adjusts welding parameters based on sensor measurements without requiring operator intervention. The system autonomously calibrates welding conditions by comparing measured indentation depth against target values and automatically modifying welding current or pressure, eliminating the time loss associated with manual quality calibration while maintaining reliable quality control.
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
The solution enables real-time inspection and autonomous calibration of welding quality, improving reliability and preventing defects by maintaining consistent welding conditions despite changes in material or equipment.
Implementation Method 1
precisely measure a welding indentation depth of a welding part by using an encoder connected directly to a rear side of the welding pressing unit
Implementation Method 2
implementing an equalizing function for moving the second welding tip in a rectilinear upward/downward direction by using the compressed air
Implementation Method 3
applying high-voltage current to the welding target
Implementation Method 4
Spot welding refers to a welding method of fixing a welding target to upper and lower welding tips provided on a spot welding gun
Data Source
AI summary
A system for autonomously calibrating welding quality by using a spot welding gun includes a spot welding gun configured to fix a welding target during a welding process. The spot welding gun is configured to precisely measure a welding indentation depth and perform autonomous welding quality calibration in response to an applied control signal. The system also includes welding robot equipped with the spot welding gun and configured to move to a designated welding point position, a welding controller configured to control a welding current and a welding time of the spot welding gun and inspect welding quality in real time by monitoring the welding indentation depth and dynamic resistance during the welding process, and a welding quality manager configured to receive a welding quality inspection result from the welding controller, transmit a welding condition feedback change, and control the autonomous welding quality calibration.