Grabener forming equipment and industrial press systems

Grabener hydroforming presses, metallic bipolar plate production lines, precision laser welding, straightening machinery, and stack assembly systems.

Grabener Hydroforming Presses

Grabener hydroforming presses are engineered for high-precision forming of metal plates with complex microstructures. Utilizing sandwich tooling enables simultaneous forming of multiple sheets per stroke, maintaining tight tolerances across intricate channel patterns.

High clamping force systems that prevent springback in formed sheets.
High-pressure seal sets, proportional valve manifolds, and transducers.
Adaptive hydraulic fluid delivery ensuring controlled sheet deformation.
In-line pressure monitoring with automatic thermal drift compensation.

Grabener Precision Cutting Machines

Grabener cutting machines are engineered for dimensional separation of coiled foil and precision perimeter trimming of formed plates. The equipment minimizes burr formation and edge strain, ensuring optimal edge alignment for downstream assembly operations.

Replaceable carbide blades, guide units, and specialized support prisms.
Optical scanner integration for cut alignment using fiducial hole markers.
Pneumatic sheet clamping units delivering uniform force across sheet areas.
Automated scrap evacuation chutes and edge trimming removal mechanisms.

Grabener Laser Welding Systems

Grabener laser welding machines provide hermetic joining of matching half-plates into unified bipolar assemblies. Precision beam delivery and high-speed scan optics enable consistent seam formation on ultra-thin stainless steel and titanium foil without burn-through.

Laser processing heads, protective windows, and collimator optical lenses.
Dedicated clamping fixtures with integrated shield gas purge channels.
High-dynamic linear motor tables with digital optical linear encoders.
In-process optical weld seam inspection and thermal monitoring units.

Grabener Straightening Machines

Grabener straightening machines calibrate plate flatness following hydroforming and laser welding sequences. Multi-roller geometries combined with micrometer-level gap adjustments relieve internal material stresses and eliminate distortion across the active area.

Precision-ground high-hardness leveling rolls with heavy-duty bearing units.
Servo adjustments for fine tuning of inter-roll roll gaps and tilt angles.
Integrated load cells monitoring continuous leveling pressure on sheets.
Protective roll coatings preventing mechanical damage to microstructures.

Grabener Stack Testing Presses

Grabener stack presses provide controlled assembly and verification of fuel cell and electrolyzer stacks. The equipment delivers uniform compressive force across the assembly, measuring stack height down to micrometer tolerances while verifying overall seal integrity.

Servo-controlled hydraulic cylinders ensuring balanced uniform compression.
Multi-point displacement sensors measuring elastomeric seal compression.
Integrated gas interface ports for mass spectrometer leak verification.
Programmable automation controllers managing multi-stage load testing cycles.

Grabener Engineering and Tooling Services

Grabener engineering services support tool design, prototype validation, and parts selection. In-house laboratory infrastructure verifies forming parameters on foils starting from 25 micrometers before customers commit to large-scale production investments.

Replaceable forming die inserts, precision matrices, and punch assemblies.
Quick-disconnect hydraulic couplings, return line filters, and sensors.
Precision guide posts and bronze bushing sets for press tooling blocks.
Maintenance overhaul packages for proportional valves and hydraulic packings.

Company heritage and precision heavy machinery engineering of Grabener

Founded in 1921 in Netphen (Siegerland region, Germany) by Theodor Graebener, the company evolved from heavy metal fabrication into a globally recognized builder of customized press systems.

Across more than a century of continuous operation, Grabener has maintained its agile medium-sized enterprise identity, combining German engineering traditions with forward-looking manufacturing innovations.

The Netphen-Werthenbach engineering and manufacturing facility designs heavy-duty custom systems for hydrogen technology, automotive, hydroforming, pipe production, shipbuilding, and offshore wind power.

Grabener machinery delivers dependable longevity under continuous mechanical stress and cyclic dynamic loading across global industrial plants.

Hydroforming technologies and bipolar plate metal forming

In the hydrogen economy sector, Grabener has pioneered manufacturing solutions for more than two decades, developing specialized equipment for fuel cell and electrolyzer metallic plates.

Hydroforming presses form intricate flow field channels on ultra-thin stainless steel and titanium foil without thinning or local necking.

The proprietary sandwich tooling technology utilized in Grabener hydroforming presses enables simultaneous forming of multiple sheets per stroke.

This approach increases manufacturing throughput, reduces specific energy consumption, and maintains repeatable micro-channel dimensional accuracy across large series production.

Automated scalable production lines from coil to finished plate

For high-volume manufacturing facilities, Grabener designs modular and scalable production lines spanning the complete process chain.

The integrated system combines foil uncoiling, precision perimeter trimming, hydroforming, cleaning, laser welding of matched half-plates, final straightening, and seal integrity testing.

The modular equipment layout allows manufacturing enterprises to expand production capacity in steps, moving from pilot-scale runs to automated high-volume series lines.

Synchronized handling modules and rapid tool exchange systems minimize changeover downtime while keeping yield rates within strict operational limits.

Precision laser welding and micro-joint seam verification

Grabener laser welding cells join thin metallic sheets into sealed bipolar assemblies along complex three-dimensional contours.

Utilizing high-speed optical scanner heads alongside solid-state fiber laser sources eliminates burn-through on delicate foils down to 25 micrometers while preserving parent alloy properties.

Dedicated shielding gas purge fixtures prevent atmospheric contamination on reactive titanium surfaces during welding. Real-time optical seam tracking monitors joint geometry throughout processing, maintaining hermetic separation between anode and cathode flow fields in every finished bipolar unit.

Precision plate leveling and residual stress relief

Following hydroforming and laser welding sequences, metallic plates experience internal thermal and mechanical stresses.

Grabener precision leveling machines calibrate overall flatness, eliminating edge waves and localized distortion through a multi-roller configuration with micrometer-level gap control.

Servo-driven gap adjustments allow fine roll leveling without distorting delicate micro-channel profiles. Achieving flat planar contact across the active area ensures uniform gasket loading in the stack, preventing localized stress concentrations and fluid leakage under high operating pressures.

Stack testing presses and prototype laboratory infrastructure

The assembly of fuel cell stacks and electrolysis modules concludes on Grabener stack testing presses. This equipment provides uniform compressive force distribution across the stack assembly, preventing membrane electrode assembly damage while achieving target gasket pre-compression levels.

At the Netphen headquarters, the Grabener production laboratory evaluates customer foil materials, refines forming parameters, and validates custom tooling. Engineering teams assist with plate design optimization, alloy selection, and maintenance spare parts selection across all machine systems.

Grabener and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Grabener and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.