Welding Gun With Automated Pressing Force Control
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Solution Overview
Problem
Conventional unidirectional spot welding guns face challenges in achieving uniform welding quality due to variations in the applied pressing force, which depends on the skill of the worker, leading to inconsistent welding results.
Innovation Solution
A welding gun integrated with a unidirectional welding system that applies a predetermined pressing force using a power portion, power connecting portion, and a detection system, ensuring consistent power application to the welding tip, along with a spring balance for reduced worker burden and improved convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional unidirectional spot welding gun is used, then the welding gun can be operated manually by a worker, but the welding quality varies depending on the worker's skill due to inconsistent pressing force application
Solution Approach 1:
The patent replaces the manual mechanical pressing operation with an automated mechanical pressing system. The pressing force is generated and controlled by a motor-driven mechanism rather than manual worker input, eliminating the variability caused by different workers' skills while maintaining ease of operation through automated control.
Solution Approach 2:
The patent incorporates a detection portion that monitors the pressing force applied by the pressure head and provides feedback to the control portion. This closed-loop feedback system ensures that the pressing force remains consistent throughout the welding process, thereby maintaining uniform welding quality regardless of operator skill level.
2Device complexity
If manual pressing force application is used, then the device structure remains simple, but uniform welding quality cannot be achieved due to worker skill variations
Solution Approach 1:
The patent introduces an automated pressing mechanism with motor drive and detection systems, replacing simple manual pressing. While this increases device complexity, it achieves uniform welding quality by eliminating human skill variability. The automated system includes a control portion that manages the pressing force application consistently.
Solution Approach 2:
The detection portion continuously monitors the pressing force and provides feedback to the control portion, which adjusts the pressing mechanism to maintain consistent force application. This feedback loop ensures uniform welding quality despite the increased device complexity required to implement the monitoring and control systems.
3Manufacturing precision
If a detection system and control mechanism are added to maintain constant pressing force, then welding quality uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent implements a feedback control system where the detection portion monitors pressing force and the control portion adjusts the pressing mechanism accordingly. This ensures consistent welding quality by maintaining constant pressing force throughout the welding process, directly addressing the need for manufacturing precision.
Solution Approach 2:
The control portion serves multiple functions: it controls the pressing force application, receives feedback from the detection portion, and coordinates with the power portion for synchronized operation. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while achieving welding quality consistency.
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 uniform welding quality by maintaining a constant pressing force and reduces worker effort, enhancing welding performance and convenience through the use of a spring balance and easy maintenance features.
Implementation Method 1
a head elastic member configured to elastically support the pressure head; and a detection portion configured to detect movement of the pressure head when the pressure head presses the head elastic member to be compressed
Implementation Method 2
a supporting portion elastic member configured to elastically support the surface contact supporting portion
Implementation Method 3
a spring balance configured to be installed at the moving beam and to pull a wire using spring tension
Data Source
AI summary
A welding gun is incorporated into a unidirectional welding system, where the unidirectional welding system includes: the welding gun performing welding when a set pressing force is applied; a power portion configured to generate power to be applied to the welding gun; a power connecting portion having one end portion connected to the power portion through a power wire and an opposite end portion engaged with the welding gun; and a power switch provided at the power connecting portion to selectively apply the power generated from the power portion to the welding gun.