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  • Gräbener Maschinentechnik: About us
    company group up until the 90ies Another important sector was the machine construction which was mainly focused on the forming technology Today Gräbener Maschinentechnik is the most significant company within the Graebener Group an association of companies with technological competence in the fields of electronics hydraulics milling cutting and forming technology True to the principle systematic diversification into core markets while supplying independent products the Graebener Group interlinks individual machine

    Original URL path: http://www.graebener-maschinentechnik.de/About-us.gmt-ueber-uns+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Contact
    Bosnia Herzegovina Brasil Bulgaria Canada Chile China Colombia Croatia Cuba Czech republic Denmark Dominican Republic Egypt El Salvador Estland Finland France Georgia Greece Great Britain Haiti Hungary India Indonesia Iraq Iran Ireland Iceland Israel Italy Ivory Coast Japan Kazakhstan Kenya Korea Kuwait Latvia Lebanon Liechtenstein Lithuania Luxemburg Madagascar Malaysia Morocco Macedonia Mexico New Zealand Netherlands Norway Pakistan Panama Poland Portugal Romania Russia Saudi Arabia Sweden Serbia Singapore Slovakia Spain South

    Original URL path: http://www.graebener-maschinentechnik.de/Contact.gmt-kontakt+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Imprint
    a service provider to our own content on these web sites According to 8 to 10 TMG we are not obligated to monitor third party information transmitted or stored on our web site or to investigate circumstances which indicate illegal activity Obligations to remove or block the use of information under the general laws remain unaffected A liability is only possible from the date of knowledge of a specific infringement On becoming aware of such violation we will immediately remove such content Liability for Links Our site contains links to external third parties web sites We have no influence whatsoever on the contents of these web sites and give no guarantees for their correctness The contents of such third party sites are the responsibility of the respective owners providers At the time that these third party web sites were linked to ours we found no reason whatsoever of any likely contravention of the law A permanent verification in relation to the contents however is not reasonable without concrete evidence of law violation We shall immediately delete a link upon becoming aware that it violates the law Copyrights The contents and works provided on these web sites are governed by the copyright laws of Germany Reproduction processing distribution or any form of commercialization of such material beyond the scope of the copyright law shall require the prior written consent of its respective author or creator Downloads and copies of this web site are only permitted for private non commercial use Insofar as the content on this web site has not been created by the provider the copyrights of third parties are respected Contents of such third parties shall be made recognizable accordingly We ask you to inform us immediately in the event that you recognize a violation of copyright if any

    Original URL path: http://www.graebener-maschinentechnik.de/Imprint.gmt-impressum+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Pipe Mills/Offshore
    necessary bending capacity turns into pre bending capacity and the customer no longer needs to commit himself to a predefined production program Due to the supporting yoke function it is finally possible to raise the pre bending capacity of a roll to the same level as the round bending capacity Flame cutting of the straight edges which has been customary so far no longer is necessary thus saving working time and material costs while at the same time increasing the economic efficiency If the supporting yoke is not needed it can be fully sunk in the foundation or even dismantled in a very short period of time 3 roll bending machine 3 Roll Bending Machine A 3 roll bending machine is still the most economic solution for the production of special shells for the construction of vessels and cones Each lateral roll and the upper roll can be adjusted Therefore an economic production of cones is possible without damage to the longitudinal plate edges High asymmetric forces during extreme conical bending require a high stiffness in the tilting bearing column Each machine is designed using FEA calculations The 3 roll bending machine uses a quick and modern machinery concept which mainly is applied in today s vessel apparatus and pipeline construction In addition to these fields of application such a bending machine can also be used for bending cones and straightening plates Today a manufacturing length of 12 2 m is the most common requirement for the production of line pipes For the production of pipeline pipes the Gräbener 3 roll bending machine is equipped with individually adjustable support rollers In addition to this Gräbener Maschinentechnik also offers various exchange rolls The 3 roll bending machine due to its speed and easy handling also is an economic production solution for conventional API pipes with small and medium wall thicknesses Bending Press Post Bending Press Bending Press Pipe Forming Press The Gräbener pipe forming presses are used for offshore pipes jackets and special pipes with increased yield points and large wall thickness pipe diameter ratio since these technical requirements exceed the physical limits of a traditional roll bending machine The results are pipes with higher stability which also leads to cost reductions since less material is needed The Gräbener pipe forming presses form large format plates to pipes with a diameter of 16 to 64 inches a length of up to 60 feet 18 3 metres and a wall thickness of up to 74 mm What s more all of the above pipe dimensions can be formed without having to change the tool Post Bending Press This machine is used to post bend the straight ends of the longitudinal edges of open seam pipes max 40 mm wall thickness step by step Heavier thicknesses are pre bent on the pre bending press It is no longer necessary to use roller type machines which damage the root face and crush the edges of an open seam pipe Depending on the tooling pipes

    Original URL path: http://www.graebener-maschinentechnik.de/Pipe-Mills-Offshore.gmt-rohrbau-offshore+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Milling Technology
    of various sizes usual tolerance requirements straightness and parallelism high precision of root face also available with vacuum plate clamping system 4 side plate edge milling machine type GPZ V medium or large plate lots of various sizes high tolerance requirements on straightness and parallelism high precision of root face of all four plate edges Combined two side plate edge milling machine for simultaneous processing of longitudinal and cross edges with movable clamping traverse and as an option with integrated welding unit type GTWP V large plate lots of various sizes highest tolerance requirements on straightness parallelism for processing of either 1 2 3 or 4 plate edges welding gap 0 also available as 2 side plate milling machine with movable clamping traverse longitudinal and cross machine Profile Milling Machine Profile Milling Machine In the shipbuilding industry namely for the production of large deck sections welding units for stiffening profiles to be welded onto the shipbuilding sections are required It is necessary to remove the rolling edges first so that these shipbuilding sections can be welded on utilizing modern joining techniques such as laser or laser hybrid welding For this purpose Gräbener has developed special profile milling machines The difference between these profile milling machines and the plate edge milling machines is that the work piece is moved and only the milling head rotates Profile milling machines are used in the steel industry for example for the profiling of sections slabs etc Circ Seam Milling Machine Circ Seam Milling Machine for narrow gap preparation of the welding seam Gräbener gained its experiences during the period when it ran its own pipe mill It was a major task to produce extremely long piles The importance of a clean and fast preparation of external circumferential weld seams on pipes vessels and apparatus became apparent For this reason the Gräbener longitudinal and circumferential milling machines were developed The longitudinally welded shells are used to produce apparatus reactors pipe constructions dolphins and spud piles They are internally submerged arc welded milled from the outside and then welded from the outside Circumferential milling can sometimes reduce the costs for one metre weld seam by more than 50 This is on the one hand due to a reduction of the time necessary to prepare the weld seam and on the other hand due to the reduced weld metal volume being applied as well as the reduction of the welding time The machines are equipped with a sensor system which automatically follows the ovality of the pipe thus guaranteeing a constant seam depth seam geometry Various models of Gräbener circ seam milling machines are available for three different milling depths with and without undercarriage GRF 30 GRF 45 GRF 55 Capacity 30 kW 45 kW 55 kW Milling depth up to 60 mm 100 mm 120 mm Transport shop crane fork lift truck shop crane fork lift truck shop crane fork lift truck GRF 45 V GRF 55 H Capacity 45 kW 55 kW Milling depth up

    Original URL path: http://www.graebener-maschinentechnik.de/Milling-Technology.gmt-fraestechnik+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Shipbuilding
    and profile milling machines and the joining of plates Thus Gräbener Maschinentechnik has not merely gained some reputation Graebener Maschinentechnik has revolutionized shipbuilding on the basis of a know how that derives from the production of large pipes TWP Systems In 2001 Gräbener Maschinentechnik installed a fully automated Tailor Welded Plates system at company Meyer Werft After Gräbener plate milling machines have prepared the weld seams the TWP system manufactures ship deck sections of up to 400 m² from single plates of various thicknesses using the laser hybrid welding process with a CO₂ laser This revolution had major impacts In 2007 Gräbener supplied a similar system to the Italian shipbuilding company Fincantieri in Triest The main difference The Fincantieri TWP system is equipped with a fibre laser for welding the plates In 2010 Gräbener set another milestone in shipbuilding and supplied a second TWP system to the company Meyer Werft This system is identical however improved further and is able to join deck sections with a width of up to 30 m and a length of 25 m maximum 750 m² using a disc laser Even the benchmark data of the project are inspirational The installation area for the system in the Meyer Werft workshop covers 2 300 m² the longitudinal traverses which the laser welding system moves upon have a length of 43 5 m and a weight of 73 tons For transport and assembly reasons each one of these traverses consists of three parts TWP systems are also used in pipe mills for the manufacturing of large pipes with two longitudinal weld seams With the TWP system the edges can be milled and welded using only one machine Plate Edge Milling Machines Profile Milling Machines Gräbener plate edge milling machines as well as profile milling machines are ideally

    Original URL path: http://www.graebener-maschinentechnik.de/Shipbuilding.gmt-schiffbau+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Hydroforming
    column press the upper and lower traverse are connected by means of pre tensioned tie rods On the one hand this allows for an optimized deflection compensation of the construction On the other hand the design provides the greatest possible access to the tool area of the press This allows the application of hydroforming tools which including the cylinders are larger than the actual table surface 4 column presses are our universal presses which can be used for a wide range of applications The accessibility from four sides ensures an optimum operating and handling comfort 4 column presses are standardized for closing forces of 630 800 1 000 1 200 1 500 1 700 2 000 2 500 3 500 and 5 000 tons These presses are especially suitable for the hot stamping process RoboClamp RoboClamp acc to patent EP1138410 licensed for Europe The RoboClamp is a pre tensioned C frame press which is especially suitable for the economic production of long components such as side rails or cross members roof frames and other component groups The RoboClamp provides easy access from three sides tool change and loading is carried out by robots This type of press is standardized for closing forces of 3 250 6 500 13 000 and 18 000 tons By the way for the construction of the RoboClamp as the world s most powerful hydroforming press we were honored by the ministry of economics with the award Germany at its best Frame presses Frame presses Frame presses are designed as rigid welded constructions These compact presses are especially suitable for the low pressure hydroformin and for smaller components such as exhaust parts or fittings like tees and reducers PressPro en Control and Feedback Control Technology PressPro An optimum forming process is also depending on a perfect interaction of operator and machine For this purpose the visualization system PressPro has been developed With the aid of PressPro the operator can develop optimize and execute the forming process independently The open and flexible system allows freely definable process steps for protoyping as well as for series production Pre defined sequences can be assigned to aech tool saved in the corresponding tool data base and accessed from there as well The time between the tool set up and the production of the first good part can be reduced significantly HNC 100 MAC 8 MLC H en HNC 100 MAC 8 MLC H Best in Class Controller for most sophisticated applications So far Gräbener Maschinentechnik as a specialist for the hydroforming technology has banked on the hydraulic control systems HNC 100 and MAC 8 Both controllers provide the general controlling functions for the hydroforming processes In order to avoid developing two controller systems further Gräbener Maschinentechnik in cooperation with Bosch Rexroth combined the advantages of the two systems and developed the MLC H MLC H Gräbener Maschinentechnik as renowned hydroforming specialist has developed a new generation of control and feedback control systems for all hydroforming presses on the basis of

    Original URL path: http://www.graebener-maschinentechnik.de/Hydroforming.gmt-hydroforming+M52087573ab0.0.html (2016-02-16)
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  • Gräbener Maschinentechnik: Hot Stamping
    formed within the tool of a special press which is connected to a cooling system and cooled down step by step 4 column presses 4 column presses are today s standard for the hot stamping process This type of press is equipped with four columns which connect and clamp the upper and lower beam 4 column presses are standardized for closing forces of 630 800 1 000 1 200 1

    Original URL path: http://www.graebener-maschinentechnik.de/Hot-Stamping.gmt-hot-stamping+M52087573ab0.0.html (2016-02-16)
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