- Material: 1.4301
- Wall thickness: 50 µm
- Pitch: 0.75 mm
- Channel depth: 0.25 mm
- Result: extremely accurate, high repeat accuracy and reproducibility
Metal microstructures are more sought-after than ever before. However, for forming specialists that means pushing the limits. Where conventional production processes fail, the patented Graebener® machines PowerBoxx® and PowerTower® are just beginning to leverage their strengths. Based on the core competences forming, cutting and welding we have been among the leading developers and manufacturers of production lines for the cost-effective production of metal microstructure plates for more than 15 years.
From engineering and prototyping services through small series production up to the customized production lines we support and accompany you on the path to a new and pioneering dimension of the forming technology.
Today, we are one of the pioneering companies in the fuel cell sector when it comes to the production of separator plates. Based on our long-term development in the business area "New Technologies" we provide the know-how of the entire value-added chain for the production of highly precise and powerful separator plates for LT-PEM, HT-PEM, DMFC and SOFC fuel cells as well as for the LT-PEM electrolysis. Numerous application tests, including a Range Extender project for the Fiat 500, give proof of that.
Microstructures have also become increasingly interesting for other fields of application: Above all for manufacturers of heat exchangers and developers of redox flow batteries.
Benefit from our long-term experience and our comprehensive network of partners.
We have developed the patented prototyping system PowerBoxx® and the patented series technology PowerTower® especially for the economic production of metal microstructures. Both concepts are based on an optimized hydroforming process. Various metals with a wall thickness from 50 µm are formed in a highly precise way by means of a fluid operating media at a closing force of up to 6,500 tons and a pressure of up to 4,000 bars – thanks to a special Graebener® compensation system, without any deflection of the press table.
Compared with classic forming methods such as punching or deep-drawing, our optimized hydroforming process offers many advantages technology as well as economy wise:
As special machine manufacturer and as one of the pioneers in this field we have been developing the hydroforming process since the mid-80ies. Based on this pool of experience we realize your customized solution tailored to your individual market demands.
When developing new production technologies, we benefit quite significantly from our process know-how gained in the classic business areas. As technology and system partner we can also offer you the services of our own world-class hydroforming prototyping center.
A total of four hydraulic presses with closing forces of 1,500, 2,500, 6,500 and 10,000 tons are available for test series and small series production. In addition to this, we also support you in the area of design and engineering.
|Materials||Stainless steels, titanium, copper, plated materials, precoated materials|
|Wall thickness||from 50 µm|
|Lot size||from initial sample to small series|
|Workpiece size||from 1 cm2 to 12 m2|
|Press forces||1,500 to 10,000 tons|
In case of questions regarding seal or coating concepts you can benefit from our tight-knit network of partners. As integral part of the fuel cell industry and Board Member of the VDMA (German Engineering Federation) work group fuel cells we have been in close contact with the most experienced developers and manufacturers for many years.