Flex appeal

read more

Flex appeal

Krüger Erodiertechnik crowns its equipment for the machining of large workpieces with the FA50-S Advance V – no less than the world’s biggest wire-cut EDM machine.

Would you risk modifying your high-tech wire erosion machine with a flex in order to create a longer Z-axis and an enlarged tank? Probably not. And it is precisely this that makes the Krüger Erodiertechnik GmbH & Co. KG success story unique. The jobshop from Biedenkopf has not only modified one of its now many Mitsubishi Electric machines, but has grown in boldness from machine to machine. The company has thus managed to achieve impressive cutting heights of 980 mm in this unconventional way. And because even these dimensions didn’t always satisfy its own needs and, more importantly, those of its customers, the company recently became the first European company to install the world’s biggest wire erosion machine – namely, the FA50-S Advance V from Mitsubishi Electric.

Against the background of its own (success) story, the investment of Krüger Erodiertechnik GmbH & Co. KG in the FA50-S Advance V from Mitsubishi Electric is a logical consequence, as the chronology leading up to its “European first” illustrates. Because, for a good 14 years now, Krüger Erodier­technik GmbH & Co. KG in Biedenkopf has been successful as a jobber for a huge array of sectors, ranging from mechanical engineering, plant engineering, the automotive industry and tool- and mouldmaking through to projects in the aerospace industry and for the flourishing sector of energy technology. Having committed itself exclusively to wire and start hole erosion in the early years of its existence, the company gradually extended its process chain, initially to include die-sink erosion and then milling.

„We looked for ways and means of improving on the standard … and we were suddenly able to offer our customers a spectrum of services that were unavailable elsewhere, or only on less attractive terms.“

„We looked for ways and means of improving on the standard … and we were suddenly able to offer our customers a spectrum of services that were unavailable elsewhere, or only on less attractive terms.“

Components measuring 2000 x 1600 x 600 millimetres can be machined on the FA50-S Advance V.

Components measuring 2000 x 1600 x 600 millimetres can be machined on the FA50-S Advance V.

„Both in terms of its operating characteristics and accessibility as well as its precision, cutting speed and reliability, I was aware of nothing better.“

All-inclusive customer orientation

This was later followed by the consistent introduction of high-speed milling and (as a complementary service) investment in mobile laser welding. In view of the all-inclusive customer orientation of the Krüger corporate strategy, it goes without saying that it has achieved mastery not only of manufacture, but also of CAD, CAM and CAQ together with 3D coordinate measuring technology with equal perfection. No less comprehensive than the technology and process chain is the company’s range of services and materials. Krüger Erodiertechnik has an excellent command of all facets of its trade and some evidently quantifiably better than the competition. This applies particularly to the machining options in the field of wire-cut EDM on the installed machines from Mitsubishi Electric. Although these machines are items of standard equipment, they have been gradually adapted with supreme mechanical engineering finesse to its own needs and those of its clients. For instance, the maximum cutting height of about 620 mm of a series machine has been raised to 750 mm and, with an FA 30-V modified on the premises, Krüger now achieves up to 980 mm – on workpieces measuring up to 1,920 x 1,450 and weighing up to 3,000 kg.

However, the fact that high-tech from Mitsubishi Electric has been the key to the company’s success in wire erosion since the founding of the company has nothing to do with its “set-up friendliness”, as Friedhelm Krüger explains looking back: “I knew the machines from Mitsubishi Electric from my earlier
years working for other employers, and also became acquainted with other makes. Both in terms of its operating characteristics and accessibility as well as its precision, cutting speed and reliability, I was aware of nothing better. So it was only natural that I didn’t want to take any risks when setting up my own business and trusted in proven and familiar equipment.”

The world’s biggest erosion machine on the way to its proud owner.

The world’s biggest erosion machine on the way to its proud owner.

Mitsubishi Electric, a leading innovator

And there has evidently been no reason for questioning the decision taken when the company was founded, as Friedhelm Krüger confirms:  “Of course, I wanted to keep myself abreast of de­velopments and looked at alternatives when it came to investing in new machinery. However, anyone who wants to replace an established supplier has to be clearly and quantifiably better. And no competitor has so far filled the bill.” He doesn’t hold back with praise either: “The earlier machines and today’s technology are worlds apart – this applies as much to the user-friendly control as to the efficient generator systems. This is where Mitsubishi Electric is in my view one of the undisputed innovative leaders in the field of wire erosion. On top of this, there’s the machine’s high degree of reliability over all the years, an all-important feature for a service provider, and excellent support from Ratingen in all matters concerning technology and service.”

Mr Krüger taking charge of the unloading of his new FA50-S Advance V.

Mr Krüger taking charge of the unloading of his new FA50-S Advance V.

Improving on the standard

But what about the penchant for unusual cutting heights in wire erosion? Friedhelm Krüger supplies the answer: “We simply hate having to turn down a job merely because we don’t have the necessary working range. So we looked for ways and means of improving on the standard instead of having to invest straight off in more expensive, larger machines. And so we boldly risked a modification on a smaller machine and discovered that it is possible to increase the cutting heights on Mitsubishi Electric machines – if it’s done properly – without compromising on performance. Consequently, we were suddenly able to offer our customers a spectrum of services that were una­vailable elsewhere, or only on less at­trac­tive terms.” But only if it’s done properly! Because the modifi­cations were anything but trivial, as Friedhelm Krüger stresses. Extra height mustn’t be achieved at the expense of precision. “Today, we cut components 700 mm high on a tuned FA 30-V from Mitsubishi Electric with a parallelism of ±0.02 mm,” says the company founder quoting a both impressive and representative example. Although such results were not achievable with mechan­ical engineering skill alone, Krüger continues. All the cutting parameters also have to be adapted to the new task, as the stan­dard values are not much use when work­ing on a larger scale. And it is not without good reason that he emphasizes (and probably to discourage po­ten­­tial imitators): “Knowing how to use a flex is not enough!”

Despite the performance spectrum of his “tuned height-extended cutter”, Fried­helm Krüger wouldn’t be Friedhelm Krüger if he had been content with the status quo. Because however flexible his machines may have become in terms of cutting height, there were other basic parameters like the maximum clamping weight that he was unable to manipulate. And in terms of workpiece dimensions, i.e. clamping area, he could have done with the odd extra centimetre from time to time.

The world’s biggest erosion machine

And because that’s the case, he recently installed a huge FA50-S Advance V from the Mitsubishi Electric Power Master series and now calls nothing less than the world’s biggest erosion machine his own. The FA50-S now enables him to effortlessly machine workpieces measuring up to 2,000 x 1,600 x 600 mm and up to a weight of 4,000 kg.

As far as the accustomed outstanding performance and operating comfort are concerned, nothing has changed. The only novelty for the operator is that the table is so large that it is accessed from a platform. No individual modifi­cations have yet been made to the machine, nor does Friedhelm Krüger intend to make any changes to cutting height at present. But he doesn’t want to entirely exclude it …

Mr Krüger (right) and Mr Neuendorf from Mitsubishi Electric (left) in front of the world’s biggest erosion machine.

Mr Krüger (right) and Mr Neuendorf from Mitsubishi Electric (left) in front of the world’s biggest erosion machine.

 

 

 

Companies in Profile

Name and place of business: 
Krüger Erodiertechnik GmbH & Co. KG, Biedenkopf, Germany
Founding year:
1996

Number of employees: 12

Managing director:
Friedrich Wilhelm Krüger

Core business:
Jobshop in the field of wire erosion, die-sink erosion and HSC milling.

Customer contact:

Krüger Erodiertechnik GmbH & Co. KG
Zur Wolfskaute 8-10
35216 Biedenkopf
Germany

Tel:        +49 (0) 64 61 / 92 63-0
Fax:       +49 (0) 64 61 / 92 63-25

info@erodieren.de

www.erodieren.de

Professionals show profile: Friedrich Wilhelm Krüger

Interview

How would you describe in a sentence what your company does?

We’re a jobshop in the fields of wire erosion, die-sink erosion and HSC milling and are at home in the world of everything from the minute to the monumental in prototype and series production.

How did you earn your first money?

Washing cars in my youth.

What motivates you?

Positive thinking.

What’s different about how you do things now, compared to five years ago?

Did I do anything wrong five years ago?

Where do you see your company in five years?

I think we shall continue to specialize. In which area depends to a large extent on our customers. As a result of our close cooperation with our customers, their aims are also ours.

What was your biggest business success?

Having ideas and putting them into practice.

What’s your favourite way to relax?

With friends.

What attributes do you value most in other people?

Honesty and reliability.

What was the best advice that anyone ever gave you?

To set up my own business.

How would you briefly describe your occupation to someone with no technical knowledge?

We cut pretty well any metal with a 0.3 mm wire without coming into contact with the material.

Friedrich Wilhelm Krüger


Krüger Erodiertechnik GmbH & Co. KG

Friedrich Wilhelm Krüger has been operating successfully as an EDM jobber for a good 14 years.

Friedrich Wilhelm Krüger has been operating successfully as an EDM jobber for a good 14 years.

Send us a Question

Fields marked with a * are mandatory.

Contact Us

Mitsubishi Electric Europe B.V.
German Branch
Mitsubishi-Electric-Platz 1
D - 40882 Ratingen

Sales
Tel.: +49 (0)2102 / 486 - 6120
edm.sales@meg.mee.com

Service
Tel.: +49 (0)2102 / 486 - 7600
edm.hotline@meg.mee.com

Applications
Tel.: +49 (0)2102 / 486 - 7700
edm.applikation@meg.mee.com

Spareparts
Tel.: +49 (0)2102 / 486 - 7500
edm.parts@meg.mee.com