Integrated Welding and Wire Preheating Power Control
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Solution Overview
Problem
Existing welding systems lack efficient control over welding and preheating power, particularly in handheld welding applications where operators may struggle to achieve optimal deposition and productivity due to limitations in travel speed and joint configurations.
Innovation Solution
The development of a welding system that allows intuitive and synergistic control of welding and preheating parameters, enabling operators to adapt settings on-the-fly through an interface on the welding torch or accessory, and automatically calculates companion weld schedules to enhance deposition and reduce hydrogen in the weld wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional welding systems are used without integrated preheating control, then the system complexity is low, but the deposition rate and productivity are limited due to operator travel speed constraints
Solution Approach 1:
The patent combines the preheating power source and welding power source into a single integrated system. The preheating circuit and welding circuit share common components including the power source, control circuitry, and output cables. This merging allows the system to provide both preheating and welding functions without requiring separate independent systems, thereby increasing productivity through coordinated control while limiting the growth of system complexity.
Solution Approach 2:
The power source is designed to perform multiple functions: it can output preheating power to heat the welding wire, output welding power to sustain the arc, and control both functions through a unified control system. The system can operate in different modes (preheating only, welding only, or combined) based on operational requirements, providing multi-functionality that enhances deposition rate without proportionally increasing complexity.
2Productivity
If welding operators manually control travel speed and parameters in handheld welding, then the system is easy to operate, but the deposition rate and productivity are reduced due to travel speed limitations
Solution Approach 1:
The control circuitry receives feedback signals from various sensors including wire feed speed sensors, voltage sensors, and current sensors. Based on this feedback, the system automatically adjusts preheating power and welding power to maintain optimal deposition conditions. This feedback mechanism enables higher deposition rates by coordinating multiple parameters automatically, while the system remains relatively easy to operate through features like automatic parameter calculation and preset welding procedures.
Solution Approach 2:
The system performs preliminary preheating of the welding wire before the welding arc is established. The preheating circuit activates first to heat the wire to an optimal temperature, then transitions to or combines with the welding circuit. This preliminary action prepares the wire for more efficient melting and deposition during welding, increasing productivity without significantly complicating the overall operation through automated sequencing.
3Productivity
If preheating power is added to the welding system, then the deposition rate increases, but the energy consumption increases
Solution Approach 1:
The preheating and welding power sources are merged into a single system that shares the primary power input and power conversion components. The control circuitry intelligently distributes the total power demand between preheating and welding functions based on operational needs. This merging reduces redundant energy conversion losses and allows for more efficient overall energy utilization compared to separate independent systems, thereby limiting the increase in energy consumption while still achieving higher deposition rates.
Solution Approach 2:
The preheating function operates periodically or in conjunction with the welding cycle rather than continuously at full power. The control system modulates preheating power levels based on the welding state, providing preheating when needed and reducing or eliminating it when the welding arc provides sufficient heat. This periodic or conditional operation increases deposition rate during critical phases while limiting overall energy consumption through intelligent power management.
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
This system significantly enhances weld operator efficiency, allowing for higher deposition rates and improved productivity by enabling precise control of welding and preheating parameters, even in challenging handheld welding scenarios.
Implementation Method 1
The preheating wire feeder is configured to receive input welding-type power from the power source, convert a first portion of the input power to output welding-type power, and convert a second portion of the input power to preheating power
Implementation Method 2
Electrical power is applied to the welding wire and a circuit is completed through the workpiece to sustain a welding arc that melts the electrode wire and the workpiece to form the desired weld
Implementation Method 3
convert a second portion of the input power to preheating power output to a preheating circuit
Data Source
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AI summary
An example welding system includes: power conversion circuitry configured to: output welding-type power to a weld circuit; and output preheating power to a preheater; and control circuitry configured to: receive an input selecting one of a plurality of weld schedules, each of the plurality of weld schedules specifying a combination of a welding-type output power and a preheating output power; and control the power conversion circuitry to output the welding-type power and the preheating power based on the selected one of the plurality of weld schedules.