Method for Producing Assemblies and Use of a Separating Means

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The invention relates to a method for producing assemblies, especially by diffusion welding, where at least two components are joined together under force. To prevent adjacent parts which should not be welded from accidentally fusing, a separating means made of fibers or graphene is placed between them. This separator does not penetrate or damage the surfaces, does not degrade surface quality, and can be easily and cleanly removed after welding, leaving no residue.

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• Mass production of metal assembly parts where multiple parts must be welded while preventing unwanted connections, such as in automotive, aerospace, or electronics manufacturing.
• Fabrication of bipolar or monopolar plates for electrolyzers or fuel cells where clean separation and high surface quality are critical.
• Manufacturing of complex layered structures (e.g., battery components, heat exchangers) where precise assembly and uncontaminated surfaces are needed.
• Any diffusion welding or high-temperature batch process where groups of assemblies are manufactured in parallel and clean separation is required between parts.
• Production of components with fine surface or structural requirements such as sealing surfaces or parts with porous or intricate internal/channel designs.

BenefitsContent extracted from patent full text and abstract with AI.

• The separating means (fibers or graphene) does not burn into, deform, or degrade the surfaces of components, thus preserving strict surface quality requirements.
• Residues or contaminants from the separator are minimized because the separating means does not fragment or remain stuck, allowing easy and residue-free removal after joining.
• The risk of contamination of open structures, cavities, or porous surfaces is drastically reduced compared to traditional separating agents.
• The process allows parallel/batch fabrication of multiple assemblies, improving throughput and manufacturing efficiency.
• The technique is compatible with demanding high-temperature, vacuum, and inert-gas welding processes, including those involving sensitive metals like titanium.
• The separator can be tailored (fiber mats, paper, woven forms, or with surface treatments) for further ease of handling and reduced adhesion, improving post-process cleaning and yield.

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Patent Abstract

The invention relates to a method for producing at least one assembly by welding, in particular by diffusion welding, and to the use of a separating means. In a method for producing at least one assembly (12) by welding, at least two components (10) are joined together by application of a force (F) acting along an axis (20). Adjacent objects (15) which are arranged along the axis (20) and which are not to be joined together are kept separate from one another using a separating means (30). The separating means (30) comprises fibers or graphene. A separating means of this kind does not penetrate into the surface, does not impair the quality of the surface, and, after the joining operation, can be removed from the surface easily and without leaving any residue.