   DIE HERMLE MPA TECHNOLOGIE
   Entdecken Sie, wie Hermles thermisches Spritzverfahren für Metallpulver
   neue Dimensionen der generativen Fertigung eröffnet. (mehr)
   Maschinenfabrik Berthold Hermle AG
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   Aktuelles

  Demo-Kugelbahn Stahl/Kupfer 520x520x170mm, 270kg

   

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    PRESSEBERICHT "Werkzeugbau Volkswagen setzt auf MPA-Technlogie" (Hermle
    Kundenzeitschrift INSIGHTS 1/2016)

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    PRESSEBERICHT "Mit technischen Innovationen Akzente setzen"  (x-technik
    Additive Fertigung 1/Juni 2015)

   weiter

    Die MPA Technologie in der Anwendung bei der Julius Blum GmbH

   Generatives Fertigen mit der MPA-Technologie im Praxiseinsatz – wie sich
   die „Technologie- und Produkt-Innovatoren“ Julius Blum GmbH...

   weiter
   ><1 / 1

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   Generativ fertigen in neuen Dimensionen! Lernen Sie die Hermle
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   HERMLE MPA TECHNOLOGY
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  Demo part steel/copper 520x520x170mm, 270kg

   

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   Additive manufacturing in new dimenstions! Get to know Hermle's MPA
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   Visit us at a trade fair or attend one of our public presentations. (more)

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     • Technology

                                        

  MPA – A metal powder application technique 

   Additive manufacturing using MPA technology
   For more than 10 years now we investigate in the development of new
   additive manufacturing techniques and processes. The MPA technology
   developed by Hermle Maschinenbau GmbH is a versatile tool for generative
   creation of large-volume components offering a widespread field of
   applications. It is especially in the field of injection moulding and die
   casting tools where the MPA technology can play to its strength. One of
   its prominent features is the possibility to complement precast blanks
   with additively applied components. The results are hybrid-manufactured
   components entering new dimensions in additive manufacturing with weights
   up to several hundred kilos and dimensions larger than 500mm in diameter.
   MPA = Metal-Powder-Application
   Hermle MPA technology stands for a thermal spray process where metal
   powder particles are compacted layer by layer to massive solids. To do so,
   the powder particles are accelerated to very high speed by means of a
   carrier gas and then deposited on the substrate via a laval nozzle.
   Material build-up rates exceeding 200 cm³ per hour and a powder jet
   diameter of several millimeters predestine our MPA technology for additive
   application of comparatively large volumes on rather large component
   surfaces.

  Additive manufacturing and milling combined 

   Additive manufacturing and milling combined
   The MPA material application unit is integrated into a Hermle 5-axis
   machining center of type C-40. The combination of MPA material application
   and milling in just one machine results in a hybrid additive manufacturing
   process. The machine's workspace allows for part dimensions exceeding
   500mm in diameter.
    
   Layer-based alternating material growth
   MPA technology is generally designed to grow material on geometrically
   accessible planes of a component. If additional materials are to be
   integrated or embedded, the materials are applied in layers as far as the
   relevant contours of the other material components are accessible for
   machining. The contour accuracy of the components depends on the milling
   method and can be adapted to individual requirements. Now we start the
   application of the respective other material onto the prepared component
   contours and subsequently mill it into shape. With this alternating
   scheme, massive components made of two or more materials can be created.
   Filling material for channels and cavities
   A special filling material allows for the creation of inner hollow areas,
   channels and undercut contours. This material is water soluble and flushed
   out at the end of the manufacturing process to expose the inner geometry.
   Subsequent heat treatment optimizes the component's microstructure and
   ensures the component has the desired hardness.
    

  Manufacturing process scheme 

   Manufacturing process explained on a demonstration marble run
   The part shown in the upper left image was created for demonstrational
   purposes. It contains a 3.4m long channel (18x18mm) serving as a marble
   run as well as an embedded copper component which, by milled out openings,
   shows Hermle's company logo.
   Part dimensions: 520 x 520 x 140 mm, total weight approx. 270kg, of which
   about 40kg where applied with MPA technology.
    
   The image sequence illustrates the main steps of the manufacturing
   process:

    1. Milling of the marble run channel into the prepared blank.
    2. Filling of the channel with a water-soluble filling material.
    3. Application of a layer of 1.2344 hot-working steel. Milling of the
       copper component contours.
    4. Application of pure copper onto the pre-milled surface and subsequent
       milling of the copper part's shape.
    5. Application of a second layer of 1.2344 steel. Milling of the copper
       inlay openings and dissolving of the remaining filling material in the
       channel.

  Material layer growth 

   Layer build-up with MPA technology
   Powder particles from the nozzle as well as the substrate surface undergo
   heavy plastic deformation on particle impact. In particular the impacting
   surface grains are getting highly stretched by local pressures exceeding
   10 GPa and temperatures up to 1000°C. Within this process, a binding
   contact surface is created between powder particle and the subtrate. The
   subsequent plasticity of colliding particles during kinetic spraying leads
   to an isothermal heating of the whole component.

  Materials 

   Base material: metal powders
   Metal powders are the base material for additive manufacturing with Hermle
   MPA technology. The physical properties of the applied metal layers and
   the transitions between materials must meet the high mechanical and
   thermal requirements defined by the operational environment of the
   manufactured component. Precise adjustment of the process parameters is
   therefore essential for each metal powder used. The properties of the
   resulting material microstructure are determined in extensive test series.
   In addition to tension and compression tests, information about particle
   and layer adhesion, porosity and material inclusions is derived from the
   examination of grindings in an optical microscope.
   Currently available materials for MPA technology:

     • hot-working steels  1.2344,  1.2367,  1.2083
     • cold-working steel  1.2333,  1.2379
     • stainless steels  1.4404,  1.4313
     • invar  1.3912
     • pure iron, pure copper, bronze…

  MPA Studio – A CAM solution for MPA technology 

   MPA Studio
   For the MPA manufacturing process we designed and developed our own
   CAD/CAM software named MPA Studio. It is used to create programs
   integrating both the additive material application and the milling paths
   into one process. The software allows the customization of the component
   geometry and the layer-by-layer analysis required for the additive
   manufacturing. The ability to simulate the complete process as well as
   quality assurance functions for checking the finished component make the
   software a flexible and versatile tool for the use of MPA technology.

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     • Applications

                                        

  Conformal cooling 

   One application focus of the Hermle MPA technology is in the field of tool
   and mould making. Here, additive manufacturing allows for countinuous and
   uniform cooling of surfaces which can hardly be achieved with conventional
   production techniques, if it is not impossible. Experience with customer
   parts has shown a large potential to reduce injection moulding cycle times
   with additively created parts with conformal cooling. In comparison with
   tools with tools without effective cooling, time savings of more than 45%
   could be achieved. With very low porosity in the sprayed material, even
   surfaces with glossy finish can be offered for some materials, e.g. 1.2344
   hot work tools steel.

   The picture series shows the main steps in the production of the above
   shown injection mould. Starting with a blank with predefine cooling
   channel, the channel volume is filled with a water-soluble material using
   MPA material application. In a milling step, surplus filling material is
   removed and the surface contour for the covering steel layer gets defined.
   Afterwards layers of steel are sprayed on the surface to close the
   channel. Now the filling material can be removed from the cooling channel
   and the whole part undergoes a heat treatment, before it gets its
   finishing.

  Additive buildup on semifinished parts 

   These three tool inserts each contain a cooling channel following the
   surface contours.For their production, we used massive blanks in which the
   cooling channels were milled in. In comparison to layer-by-layer buildup
   of the whole parts, using blanks is way more time- and cost-efficient.
   The additive manufacturing part is reduced to two steps: Filing the
   channels with a water-soluble material and subsequent application of the
   respective covering layer of steel (blue marks in the picture).

   For the material layer application we use the five axes simultaneous
   dynamics of the machine to achieve a homogeneous growth on the curved
   surfaces of the parts. For the two parts shown on the right, layer buildup
   was carried out radially while the respective blank was rotating on the
   machine's C-axis.

  Heat conduction with copper elements 

   With MPA technology, different materials can be combined in one part. One
   application of interest is to embed copper elements as heat conductors in
   steel components. For the parts shown here, copper was integrated at
   locations where cooling via a channel is not possible because of geometric
   limitations. Often these copper elements transport the thermal energy from
   hot spots to the cooling channel located further inside the part.

   Similar to the production sequence for cooling channels, predefined
   geometries are filled with copper using the MPA process to achieve a
   thermal coupling between copper and steel substrate. After milling the
   surface, layers of steel are applied to cover the copper.

  Integrated heating elements 

   Applications with a contrary purpose to confocal cooling are components
   with integrated heating elements. In the manufacturing process, notches
   are milled in the blank where the isolated heating filaments are forced
   in. The part is then covered with a layer of steel using MPA material
   application. The direct connection of the heating element to the sprayed
   material provides an outstanding thermal coupling, outperforming normal
   pressing contacts by far. For local temperature control, additional
   thermal elements can be integrated as well.

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     • Company

                                        

    Hermle Maschinenbau GmbH (HMG) - D-Ottobrunn

   Hermle Maschinenbau GmbH is a subsidiary company of Berthold Hermle
   Machinenbau AG located in Ottobrunn near München. For more than 10 years
   now we investigate in the development of new technologies and processes in
   the field of additive manufacturing. In particular the Hermle MPA
   technology for generative manufacturing by application of metal powder was
   developed here and is now ready for use.

   In addition to research and development, production capacities for
   applications of the MPA technology were set up in recent years which allow
   us to offer additively manufactured individual components to our
   customers.

    Maschinenfabrik Berthold Hermle AG - D-Gosheim

   Maschinenfabrik Berthold Hermle AG is one of the worlds leading
   manufacturers of milling machines and machining centers. Owing to their
   high quality and precision, Hermle machine tools are used in highly
   demanding sectors such as medical technology, the optical industry, energy
   technology, the aircraft, automotive and motor sport industries and their
   subcontractors.

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     • Contact

              Would you like to learn more about MPA technology? 

   Would you like to manufacture a component using Hermle MPA technology? Or
   do you have any questions regarding the benefits and limitations of this
   technology?

   We will gladly take the time to sit down with you and discuss exact
   components and their specific demands.

   We look forward to hearing from you and will get back to you as quickly as
   possible. Also feel free to call us:

  Contact form 

   Hermle Maschinenbau GmbH
   Daimlerstrasse 6
   D-85521 Ottobrunn

   Phone    +49 (0) 89 6735950-335
   Mail        sales.hmg@hermle.de

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     • Trade fairs

          Get in touch with Hermle MPA technology at the trade fair. 

   Get informed about Hermle MPA Technology. Talk to our team about your
   interests in additive manufacturing.

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     • Download

                                        

   Download
   Info leaflet about Hermle MPA technology (german, V09/2016)
   PDF: 2.11 MByte
   Download
   Info leaflet about Hermle MPA technology (english, V09/2016)
   PDF: 2.10 MByte
   Download
   INSIGHTS 1/2016 - Hermle customer magazine with a report on MPA technology
   applications at Volkswagen
   PDF: 3.68 MByte

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   News

  Demo part steel/copper 520x520x170mm, 270kg

   

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   Additive manufacturing in new dimenstions! Get to know Hermle's MPA
   Technology. (more)

   

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   Explore the widespread applications of MPA technology in our gallery!
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     • Imprint

                               Legal information!
                               Hermle AG Imprint 

   Provider identification
   Hermle Maschinenbau GmbH (HMG)
   Industriestraße 8-12
   D-78559 Gosheim

   Post-Adress
   Hermle Maschinenbau GmbH (HMG)
   Daimlerstraße 6
   D-85521 Ottobrunn
   Telefon: +49 (0) 89 6735950-0
   E-Mail: sales.hmg@hermle.de
   Internet: www.hermle-generativ-fertigen.de

   Management board with power of representation: Franz-Xaver Bernhard,
   Rudolf Derntl
   Registration Court: Reg. Gericht Stuttgart
   Registry Number: HRB 460 876
   Turnover tax identification number according to § 27 a Turnover Tax
   Law: DE205811607
   Responsible according to § 6 MDStV: Rudolf Derntl

   Disclaimer
   Each page of this Internet domain was carefully prepared at the date of
   change stated. They only serve for general information and do not
   constitute advice in concrete cases. HMG declines any responsibility for
   the up-to-datedness, correctness, completeness and/or quality of this
   website.

   HMG declines any liability for damage resulting directly or indirectly
   from the use of this web site or from the download of data from this web
   site.

   Our web site contains links to other web site providers. HMG declines any
   warranty or liability for their function and any contents that may be
   illegal or for any other infringements of the law.

   Copyright ©
   Hermle Maschinenbau GmbH (HMG), Gosheim, Germany. All rights reserved. All
   contents, such as texts, pictures, graphics, sound, video and animation
   files and their arrangements are subject to copyright law and other laws
   for the protection of intellectual property.

   Reproduction or distribution of the pages or their contents is only
   authorized by prior written consent from the HMG or only in connection
   with the references and dates stated. Without this written authorization,
   the contents of this web page must not be copied, distributed, modified or
   made accessible to third parties for commercial purposes.

   Some of the contents of the pages of this Internet domain are from third
   parties who do not allow further reproduction and distribution. Where
   mention is made of references or found sites, the pages do neither
   represent the legal view nor the opinion of the HMG.

   The intellectual property is protected by various laws, such as patent
   law, trademark law and copyright law of the HMG.

   Data protection, data security
   For the processing of inquiries or communications, we ask you to provide
   your personal data. The data submitted is handled and used with the proper
   care and only for processing your request.

   We register data exclusively to the extent necessary and in accordance
   with German data protection and data security laws. No data is passed on
   to third parties or marketed in any other way.

   The mail function in this web site is run via unprotected Internet data
   structures. HMG can therefore not give any guarantee as to reliability and
   completeness of the data transmissions. Prior to using the mail function,
   please check which type of information is suitable for Internet-based
   transmission.

   Automatically collected information
   When our web site is accessed, we register general information, such as
   browser, number of visits, duration of visit, pages called up. This
   information is used internally for statistical purposes.

   Web site management
   HMG runs and manages the web site in Germany according to German law.

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