Rotary Welding Unit Layout for Fast Weld Spacing Changeover

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Solution Overview

Problem

Existing rotary welding devices require manual intervention and time-consuming operations to changeover between different product formats by varying the weld spacing, which involves adjusting the radial position of welding units and re-tensioning the continuous web, leading to inefficiencies in producing standard and non-standard formats.

Innovation Solution

A rotary welding device with movable welding units and supporting elements that adjust radially to change the weld spacing automatically, allowing the continuous web to be tensioned and supported along a variable polygonal perimeter, enabling format changeovers without operator intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If manual adjustment of welding units radial position is used to change weld spacing, then adaptability to different product formats is improved, but loss of time and productivity deteriorate due to time-consuming manual reconfiguration

Engineering Contradiction:

Improveadaptability to different product formatsVSAvoidtime for format changeover

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The welding units are mounted on a load-bearing structure that can radially move as a group, allowing dynamic adjustment of the working circumference. This enables the system to adapt to different weld spacing requirements by changing the radial position of the entire assembly, rather than manually repositioning individual welding units.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The supporting elements are designed to automatically tension the continuous web when the load-bearing structure moves radially. The elements engage with the web and maintain proper tension through their mechanical design, eliminating the need for manual web re-tensioning during format changes.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If manual reconfiguration of welding units is performed to vary weld spacing, then adaptability to different formats is improved, but productivity deteriorates due to repeated web cutting and rewinding operations

Engineering Contradiction:

Improveability to make standard and non-standard formatsVSAvoidproduction efficiency during format changeover

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The welding units and supporting elements are combined into an integrated load-bearing structure that moves as a single unit. This merging allows simultaneous adjustment of welding position and web tensioning, eliminating the separate manual operations previously required and maintaining continuous production during format changes.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system uses dynamic radial movement of the load-bearing structure to adjust the working circumference for different formats. This dynamic adjustment mechanism allows the device to smoothly transition between different weld spacing configurations without stopping production or performing manual reconfiguration tasks.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If fixed radial position of welding units is used, then device complexity is reduced, but adaptability to different weld spacing requirements deteriorates

Engineering Contradiction:

Improvestructural simplicity of welding deviceVSAvoidability to vary weld spacing

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The load-bearing structure incorporating welding units and supporting elements is designed to move radially as a group. This dynamic capability allows the device to adapt to different weld spacing requirements by adjusting the working circumference, while maintaining relative structural simplicity through the integrated design.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The load-bearing structure serves multiple functions: it supports the welding units, tensions the continuous web through integrated supporting elements, and enables radial movement to adjust the working circumference. This multi-functionality reduces the need for separate adjustment mechanisms, maintaining device simplicity while enhancing adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11510824B2Rotary welding device and related method

Publication Date: 2022.11.29 GDM

AI summary

A rotary device for welding a continuous web comprises a rotary unit rotating about a respective axis and welding units for welding the web mounted, angularly spaced, on the rotary unit. A movement device varies a radial position of the welding units. First and second supporting elements supporting the web are disposed, respectively, upstream and downstream of respective ones of the welding units, to keep the web tensioned when the respective welding unit is at an operating position. The first and second supporting elements are supported by a load-bearing structure connected to the welding units in such a way that a radial movement of the welding units corresponds to a movement of the first and second supporting elements towards and away from the axis.