Portable Friction Welding Control for Safe Fixture Attachment
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Solution Overview
Problem
Conventional mechanical fastening methods for installing fixtures to substrates are time-consuming, prone to alignment issues, and pose ignition hazards, especially in areas with combustible gases, and can compromise material integrity and coatings, while requiring specialized skills for consistent results.
Innovation Solution
An automated electric portable friction welding system with a modular design, utilizing a portable friction welding tool connected to an electric power system, featuring a linear actuator, rotary motor, collet, and control system with sensors and a control module for precise control and programmability, enabling efficient and consistent welding operations across various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mechanical fastening methods (drilling and tapping) are used to install fixtures to substrates, then fixtures can be mechanically attached, but the process is time-consuming and prone to alignment issues
Solution Approach 1:
The patent replaces conventional mechanical fastening methods (drilling and tapping) with friction welding technology. The friction welding system uses rotational friction to generate heat and join the fixture directly to the substrate, eliminating the need for separate drilling and tapping operations. This substitution of mechanical processes with a thermal-mechanical welding process significantly reduces installation time and improves productivity.
2Strength
If conventional welding applications using exposed flame, arc or electrical discharge are used, then fixtures can be joined to substrates, but ignition hazards are created in areas with combustible gases
Solution Approach 1:
The patent converts the potentially harmful effect of friction (which generates heat) into a beneficial welding process. By using controlled rotational friction between the fixture and substrate, the system generates localized heat to create a strong weld joint without requiring exposed flame, arc, or electrical discharge. This eliminates ignition hazards in combustible environments while maintaining weld joint strength.
3Strength
If conventional welding processes are used to join fixtures to substrates, then fixtures can be welded, but heat generated may lead to loss of structural integrity in the bond or adjacent material and may compromise coatings and liners
Solution Approach 1:
The patent applies local quality by concentrating the heating action precisely at the interface between the fixture and substrate during friction welding. The rotational friction generates heat only where the two surfaces contact, creating a localized thermal zone. This localized heating achieves strong weld bonds without subjecting adjacent materials and coatings to excessive heat, preserving their structural integrity and protective properties.
4Ease of operation
If conventional welding tools and methods are used by tradesmen with ordinary skill levels, then welding operations can be performed, but results are frequently inconsistent and unsatisfactory
Solution Approach 1:
The patent incorporates feedback mechanisms through automated control systems that monitor and adjust welding parameters in real-time. The system controls rotational speed, axial force, and welding duration to ensure consistent results regardless of operator skill level. This automation and feedback control eliminate the variability associated with manual operation, making the process reliable and accessible to tradesmen with ordinary skill levels.
5Productivity
If portable friction welding systems are used to address challenges and provide efficient welding, then high quality welds can be achieved, but excessive reliance on highly specialized skilled labor is required
Solution Approach 1:
The patent implements self-service through automated control systems that manage the friction welding process without requiring specialized operator intervention. The system automatically controls rotational speed, axial force application, welding duration, and cooling phases. This automation enables unskilled or semi-skilled workers to operate the equipment effectively, reducing dependency on highly specialized skilled labor while maintaining high welding quality and efficiency.
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
Facilitates safe, efficient, and high-quality welding operations in diverse environments, reducing the need for specialized skills and minimizing material damage, while allowing for flexible deployment in field applications, including remote and underwater settings.
Implementation Method 1
Friction induces very localized heating from rotating a fixture held against a substrate to which it is being joined
Implementation Method 2
rotation stops and forging force holds the fixture against the substrate until the localized plasticized material solidifies
Implementation Method 3
the localized plasticized material solidifies and the weld is complete
Data Source
AI summary
An automated electric portable friction welding system is disclosed for friction welding a fixture onto a substrate, the welding system having a linear actuator received to produce a defined stroke within a tool housing and a rotary motor engaged to said linear actuator to slide therewith. A control module controls welding operations as a function of encoded instructions and the sensor data from the linear actuator and the rotary motor, whereby the control module affords both active control of the linear actuator and rotary motor, individually to performance parameter instructions, and in coordination through phases of the weld process in response to linear actuator operation sensors and motor operation sensors. Another feature of some embodiments of the present invention is a portable friction welding network and a method for supporting portable friction welding on the cloud.