Adjustable Orbital Welding Head for Precise Copper Pipe Joining

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Solution Overview

Problem

Orbital welding processes, particularly for copper pipes, face challenges due to high thermal conductivity leading to increased energy consumption and susceptibility to oxidation, with existing devices lacking precision and being unsuitable for handheld applications.

Innovation Solution

An orbital welding device with an adjustable welding head and locking mechanism that encloses the joining area, ensuring precise alignment and shielding, combined with a compact design for handheld use, and an electrode recirculation mechanism for controlled welding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If higher energy levels are used to weld copper pipes, then welding temperature is achieved, but energy consumption increases

Engineering Contradiction:

Improvewelding temperatureVSAvoidenergy consumption

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The welding head provides localized shielding and concentration of welding energy at the joint area, improving thermal efficiency and reducing overall energy consumption by focusing heat where needed rather than dispersing it

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent replaces manual welding operations with an automated orbital welding system that uses precise mechanical positioning and automated electrode movement, improving process efficiency and reducing energy waste through consistent, controlled welding parameters

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If copper pipes are welded with high thermal conductivity, then welding process completes quickly, but inner surface heating and oxidation increase

Engineering Contradiction:

Improvewelding speedVSAvoidoxidation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The welding head creates an enclosed environment that shields the welding area and inner pipe surface from atmospheric oxygen, preventing oxidation while allowing the welding process to proceed at high speed without compromising pipe integrity

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

Solution Approach 2:

The shielding environment is established before welding begins, and the inner pipe surface is protected in advance from oxidation, allowing the welding process to proceed without interruption or post-welding remediation

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If existing orbital welding devices are used, then welding function is provided, but precision and compactness for handheld use are insufficient

Engineering Contradiction:

Improvehandheld portabilityVSAvoidelectrode alignment precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The welding head incorporates adjustable and adaptable components that can dynamically adjust to different pipe sizes and configurations while maintaining precise electrode positioning, enabling both handheld portability and welding precision

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The welding device is divided into modular components including the welding head, positioning mechanism, and shielding structure, allowing for compact handheld design while maintaining precise electrode alignment through independent adjustment of each module

Inventive Principle:

Principle #1Segmentation

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

Reduces energy consumption and minimizes oxidation by maintaining precise electrode guidance and shielding, enabling efficient and portable welding.

Implementation Method 1

arc-based orbital welding processes, in particular tungsten inert gas (TIG) welding processes

Methodology Applied

Scientific EffectElectric arc: Electric Arc

Implementation Method 2

On the outside of the pipes, discoloration can be largely suppressed by the shielding gas used in TIG welding

Methodology Applied

Scientific EffectShielding gas protection:

Implementation Method 3

Due to copper's high thermal conductivity, the heat introduced into the material from the outside during the welding process is quickly dissipated

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4674562A1Orbital welding device with a welding head adjustable between open and closed positions

Publication Date: 2026.01.07 VIEGA TECHNOLOGY GMBH & CO KG

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Figure 2a~2b
Figure 2c~2d

AI summary

The invention relates to an orbital welding device (100, 101) with a welding head (104) having a receptacle (106) for positioning a joining area (150) of two joining partners that are at least tubular in the joining area (150), in particular a fitting (152) and a pipe end (154), wherein the welding head (104) has a first opening (166) and a second opening (168) opposite the first opening (166), between which the receptacle (106) extends, and wherein the welding head (104) is adjustable between an open position and a closed position, wherein in the open position the welding head (104) has an insertion opening (164) connecting the first and second openings (166, 168) for inserting a joining area (150) of two joining partners that are at least tubular in the joining area (150) into the receptacle (106) and wherein the insertion opening (164) is at least partially closed in the closed position.The invention further relates to a system (700) with such an orbital welding device (100, 101) and an orbital welding process.