New DIN 2304 standard and its use in practice

Groß, Andreas; Lohse, Hartwig

doi:10.1007/s35784-015-0534-4

Cited by 11 publications

(7 citation statements)

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“…The track record and success story of adhesive bonding technology are based on establishing and safeguarding reliable joining processes. The early one and a half decades of the twenty-first century highlighted that quality assurance "for correct adhesive application and documented via certification" contributes to minimising faults, saving money, generating trust, promoting the wider use of adhesives, and sustainably improving the image of adhesive bonding, which may be clouded by observations that "bonding errors are often still encountered" [11]. So, let us first and foremost grasp a clearly arranged and predominantly technical image of this promising joining technology.…”

Section: Adhesive Bonding Processesmentioning

confidence: 99%

“…Clearly, among the required surface conditions listed above an attribute like "bondable" was not indicated, possibly due to the fact that it can hardly be considered a metric, numerical or steadily continuous material feature. In contrast, "ready to bond" is considered to refer to the feedback given to a technical operator or worker within the bonding process and is accounted for by the bonding supervisor in charge [11]. Such feedback is based on comparative monitoring and evidence of compliance with the quality/requirement-relevant data obtained for a qualified benchmark system.…”

Section: Quality Assessment For Adhesive Bondingmentioning

confidence: 99%

“…Why are these topics so highly relevant at present? Fundamentally, we share expectations that in the twenty-first century, progress in joining functional or lightweight materials and components will essentially be driven by innovations based on adhesive bonding technology and by developments that will enable manufacturers to safeguard the quality and optimise production [11][12][13], integrating these three drivers into a factory-of-the-future approach for composite manufacture, e.g. in the aerospace or automotive industries [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Introduction to Recent Advances in Quality Assessment for Adhesive Bonding Technology

Noeske

Cavalcanti

Brüning

et al. 2021

Adhesive Bonding of Aircraft Composite Structures

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The first chapter highlights the relevance of both adhesive bonding technology and in-process quality assessment for mastering twenty-first-century challenges in joining functional and lightweight materials like carbon fibre reinforced polymers. The ongoing developments of the relevant technological and regulatory procedures and frameworks are hereby outlined, following trends for data-driven innovation and standardisation. Advances from monitoring process variables towards the in-depth and objective Extended Non-destructive Testing (ENDT) of material-related features are presented, based on methodological and technological innovation and insights from recent European joint research projects like Horizon 2020s ComBoNDT—“Quality assurance concepts for adhesive bonding of aircraft composite structures by advanced NDT”. Introducing ten heuristic principles for quality assessment in bonding processes, a concept is demonstrated for establishing empirically consolidated sets of quantitative material and process-specific correlations between design-relevant joint features and quality data measured during the manufacture or repair of adhesive joints using ENDT. Each correlation is obtained by systematically introducing disturbances of relevant process features identified by experts and is levelled once by linking findings from standardised mechanical tests with ENDT results obtained for joints that have intentionally been manufactured or repaired in an off-specification way. Subsequent chapters will demonstrate the suitability of the broadly applicable process.

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Section: Adhesive Bonding Processesmentioning

confidence: 99%

Section: Quality Assessment For Adhesive Bondingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Introduction to Recent Advances in Quality Assessment for Adhesive Bonding Technology

Noeske

Cavalcanti

Brüning

et al. 2021

Adhesive Bonding of Aircraft Composite Structures

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“…During planning and qualification of an adhesive bonding process in the life cycle of a reliably joined product, an important topic is estimating and evaluating the influence of production process parameters on the strength and durability of the adhesive bond [2]. A challenge is intrinsic to adhesive bonding being a special process: quality assurance and quality control for the production of bonded joints cannot start with characterising the products that result from performing the process [3]. Rather, pre-process and in-process measures need to be considered.…”

Section: Introductionmentioning

confidence: 99%

“…With respect to organizational aspects, the new German standard DIN 2304 "Adhesive bonding technology -Quality requirements for bonding processes" is a precious and relevant document [3]. Technical aspects of the approach, as outlined in the aforementioned standard, cover pre-process, in-process, and post-process quality control in the frame of an overarching quality assurance concept to verify that there are no technical shortcomings with the joining process [3]. Accordingly, there are an increasing number of new and efficient automated solutions available [1], [4][5][6] to support these requirements.…”

Section: Introductionmentioning

confidence: 99%

Extended non-destructive testing for inline quality control of cleaning and pre-treatment processes in adhesive bonding of polymer blends

et al. 2022

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This investigation aims to demonstrate relevant pitfalls of exemplary surface contaminations on polymer blends with respect to quality assurance (QA) of adhesive joints, and highlights approaches of Extended Non-Destructive Testing (ENDT) for tackling the challenges inline during manufacture or repair processes. Greasy fingerprints were intentionally applied on surfaces of different acrylonitrile butadiene styrene (ABS) substrates before joining them with a two component (2C) polyurethane (PU) adhesive. Even when a required cleaning process was omitted before performing a pre-treatment with atmospheric-pressure plasma (APP), measured initial strengths of unaged joints did not reveal significant differences, if compared to joints produced following the qualified bonding process, which comprises a wipe-off wet cleaning before the pre-treatment step. However, after accelerated ageing mimicking the application conditions for joints, resulting strengths were more than 30% lower than for joints produced with the qualified bonding process. Thus, applying post-process random inspection of as-manufactured joints based on destructive testing, and merely evaluating initial joint strengths is not sufficient for assuring the reliability of such manufactured joints. Rather, it is recommended to encompass the intended or specified use within the formulation of the quality requirements. Introducing in-process ENDT procedures, and exemplarily monitoring the substrate surfaces with an Aerosol Wetting Test (AWT), is shown to identify latent fingerprints and to ensure a rapid and documented way to validate adherend surface quality before the application of the adhesive.Article Highlights Surface quality assurance leads the way for process management decisions to safeguard relevant adherend properties before applying adhesive. Using an Aerosol Wetting Test for plastic adherends allows for identifying latent fingerprints that would impair joint strength. Extended Non-Destructive Testing facilitates embracing potential in-process contaminations when scheduling cleaning processes for adherends.

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The 5 Steps for Achieving Safe and High‐Quality Bonds (Overview)

2022

Adhesive Bonding in Five Steps

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New DIN 2304 standard and its use in practice

Cited by 11 publications

References 0 publications

Introduction to Recent Advances in Quality Assessment for Adhesive Bonding Technology

Introduction to Recent Advances in Quality Assessment for Adhesive Bonding Technology

Extended non-destructive testing for inline quality control of cleaning and pre-treatment processes in adhesive bonding of polymer blends

The 5 Steps for Achieving Safe and High‐Quality Bonds (Overview)

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