Resistance Welding Nut Control With Sequential Recipe Switching
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Solution Overview
Problem
Existing resistance welding systems for nut control face challenges such as incorrect nut positioning, use of wrong nut sizes, and lack of sequential control for multiple nut welding, leading to inefficiencies and potential errors in the welding process.
Innovation Solution
The system measures the upper electrode distance linearly to distinguish between nuts of different heights, allows use of various electrode assemblies, including those with projection tables, and implements a sequential welding process with automatic control of different nut types, preventing operator errors by locking the wrong nut boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of sensor position is used to accommodate different nut sizes, then the system can adapt to various nut dimensions, but the operator must manually adjust the sensor position, increasing operation time and potential for error
Solution Approach 1:
The system automatically measures the upper electrode distance and adjusts the magnetic band position without requiring manual intervention. The sensor detects the nut height automatically, and the system self-adjusts by moving the magnetic band to the correct position based on the measured distance, eliminating the need for operator adjustment while maintaining adaptability to different nut sizes
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated measurement and control system. An optical or linear scale system measures the upper electrode distance, and this measurement is converted into automatic positioning of the magnetic band, substituting manual mechanical adjustment with an automated electromechanical system
2Productivity
If sequential welding process with automatic control is implemented for multiple nuts, then welding accuracy and efficiency improve, but the system complexity increases due to multiple sensors and control mechanisms
Solution Approach 1:
The upper electrode assembly serves multiple functions: it performs the welding operation, measures the distance to the nut via optical or linear scale systems, and triggers the sequential control process. This multi-functionality reduces the need for separate dedicated components, thereby managing system complexity while enabling sequential welding of multiple nuts with different properties
Solution Approach 2:
The system uses feedback from the upper electrode distance measurement to automatically adjust the magnetic band position and control the sequential welding process. The measured distance information is fed back to the control system, which then determines the appropriate welding parameters and sequence, enabling automatic control without requiring complex manual programming
3Measurement precision
If the system measures upper electrode distance to distinguish nut heights, then accurate control of different nut types is achieved, but the measurement system becomes more complex requiring additional sensors
Solution Approach 1:
The upper electrode assembly is designed to perform both welding and measurement functions. The optical or linear scale system is integrated into the upper electrode, allowing it to measure the distance to the nut while maintaining its welding function. This integration avoids adding separate complex measurement systems while achieving precise nut height measurement
Solution Approach 2:
The patent uses an optical or linear scale system as an intermediary between the upper electrode and the control system. This intermediary converts the physical distance measurement into electrical signals that can be processed by the control system, enabling accurate measurement without requiring complex direct sensing mechanisms
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 system ensures accurate nut control and sequential welding of multiple nuts, preventing errors and improving efficiency by automatically managing different nut types and sizes, and providing real-time monitoring and control of welding parameters.
Implementation Method 1
at least one magnetic band (11) to indicate positions that enable to understand the movement of the mechanism digitally
Implementation Method 2
the position of the magnetic band (11) is sent analogously from the sensor (16) to the PLC
Implementation Method 3
resistance welding is generally used for this process... It is a jointing process made with the help of heat formed from the resistance of these parts against the electrical current passed through the metal parts
Data Source
AI summary
The present invention relates to a resistance welding system for nut control; the resistance welding system uses a resistance welding method in the process of welding nuts to metal sheets; detects the situations of the parameters are in or out of tolerance values that the parameter can be nut lengths, nut inner diameter differences and acceptability of welding seam riser heights, by makes control them at the welding process and gives warning according to situation; enables automatic control to different types of nuts on a component in processes where multiple nuts are welded onto one component by maintaining a recipeable and sequential welding process via calling registered welding properties for the corresponding nut; it also relates to a resistance welding nut control system that prevents the operator from taking the wrong nut and loading it into the machine.