• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for forging a hollow body (3) with forging axes arranged symmetrically about a forging axis, drivable in the sense of radial working forges (2) and with a swiveling mandrel (4) provided on a rotatably mounted mandrel bar (5). In order to enable advantageous forging conditions, it is proposed that a rotary drive (10) acts on the mandrel rod (5) and that the rotary drive (10) via a control device (11) depending on the rotational position of the forging mandrel (4) with respect to the respective one working stroke exporting forging tools (2) is controllable.
    公开号:AT511745A1
    申请号:T1172/2011
    申请日:2011-08-12
    公开日:2013-02-15
    发明作者:
    申请人:Gfm Gmbh；
    IPC主号:
    专利说明:

    • t · · M 4U * · * «f • *« «· · I * ·« «
    (38063) II
    The invention relates to a device for forging a hollow body with centrally symmetrically arranged around a forging axis, drivable in the sense of radial strokes forging tools and provided with a rotatably mounted mandrel on a forging mandrel.
    The forging of hollow bodies, in particular of tubes, has the advantage over the known rolling methods for producing such hollow bodies, inter alia, that different outer shapes of the hollow body can be produced due to the comparatively simple replacement of the forging tools and the generally possible possibility of tool adjustment. A disadvantage, however, is that the cooperating with the forging tools forged mandrel, in particular when it is held against rotation, is exposed to a non-uniform load over the circumference, which can lead to local overloads and thus to a shortening of life. To avoid such overloads has already been proposed to freely rotatably support the mandrel, but it has been shown in practice that this measure uneven wear and depending on a reduction in the service life of the forging mandrel is not avoided. In addition, difficulties arise to supply a lubricant or means for descaling or treating the inner surfaces of a hollow body in the immediate forging area on the forging mandrel, without accepting due to the action of the forging tools marks the inner surface of the hollow body through the outlet openings of the manifolds of the forging mandrel for such means in purchasing have to.
    In order to prevent the tendency for an eccentric displacement of the pipe inner cross-section with respect to the outer contour of the pipe during rolling of tubes, it is known (EP 2 067 542 A1) to rotationally drive the piercer mandrel against the rolling direction of the rolling stock and preferably the piercing mandrel with respect to the driven mandrel To offset the eccentric dome rod in order to achieve a tumbling motion in the area of the piercer, but this excludes the use of such measures in forging machines.
    The invention is therefore based on the object, a device of the type described for the forging of a hollow body in such a way that the service life of the forging mandrel can be increased. In addition, the possibility should be created to supply means for lubricating and / or for treating the inner surface of the hollow body in the immediate forging area, without endangering a uniform formation of the inner surface of the hollow body.
    The invention solves the problem set by the fact that the forging mandrel forms over its circumference distributed molding surfaces for the cavity of the hollow body and that the control device drives the rotary drive for the mandrel bar in response to the rotational position of the mold surfaces relative to each one working stroke exporting forging tools.
    The proposed measure makes it possible in a simple manner to turn the forging mandrel in each case so opposite to a forging exporting forging tools that form certain peripheral sections of the forging mandrel the respective molding surfaces for the cavity of the hollow body to be forged. By a predetermined rotation of the forging mandrel can thus be made a distribution of the loads occurring over the circumference of the forging mandrel either to achieve a substantially uniform mandrel load or to avoid that higher-loaded peripheral areas or peripheral areas that should not be exposed to higher load in the Loading area of the forging tools. 3:
    With the help of the control device for the respective rotational position of the forging mandrel opposite to a power stroke exporting forging tools can also be ensured in a simple manner that means for lubrication and / or treatment of the inner surface of the hollow body to be forged are fed directly in the forging area, because the forge is on his Formed circumferentially distributed molding surfaces for the cavity of the hollow body, so that the control device can control the rotary drive for the mandrel bar depending on the rotational position of these mold surfaces with respect to each working stroke exporting forging tools with the effect that provided for between the molding surfaces of the forging mandrel outlet openings of distribution lines for the means for lubricating and / or treating the inner surface of the hollow body are not rotated within the range of action of the forging tools used in each case. This avoids the danger that, under the influence of the forging forces, the outlet openings of the distributor lines leave markings on the inner surface of the hollow body, although via these outlet openings of the distributor lines the supplied means reach the forging area directly, because the hollow body to be forged is rotated about its axis , Particularly advantageous conditions arise in this context when the outlet openings of the distribution lines open into longitudinal grooves which divide the forging mandrel into the individual forming surfaces forming mandrel segments. In this case, over the entire axial length of the forging engagement, the supply of each used agent can be ensured in an advantageous manner.
    In the drawing, the subject invention is shown, for example. Show it
    1 shows a device according to the invention for forging a hollow body in a schematic, partially torn side view,
    Fig. 2 shows this device fragmentary in the forging tools in a longitudinal section in a larger scale and Fig. 3 is a section along the line III-III of Fig. 2 on a larger scale. * «
    * «• · · · · I * • f
    • ·
    As is apparent in particular from FIG. 1, the forging device according to the illustrated embodiment, a not shown in detail frame 1 with centrally symmetrical about a forging axis arranged forging tools 2, which are driven in a conventional manner via radial adjusting drives and radial strokes for forming the outside of the hollow body 3 to be forged. The inner shape of the hollow body 3 is predetermined by a forging mandrel 4, which is supported by a mandrel rod 5. For the advancement of the hollow body 3 serve the frame 1 with the forging tools 2 upstream and downstream clamping heads 6, which are mounted in carriage 7 and can be moved by means of these carriages 7 along a guide bed 8. While the hollow body 3 to be forged has to be conveyed through the frame 1 in the direction of advance by means of the clamping heads which are generally used successively, the forging mandrel 4 must be axially fixed relative to the forging tools 2 at least for certain deformation steps. This means that the mandrel rod 5 passes through the associated clamping head 7 and is to be stored on the side facing away from the frame 1 side of the carriage 7, for example, also on a carriage 9 which is movable on the guide bed 8 to the forging mandrel 4 optionally opposite To position the forging tools 2 or to pull out of the range of forging tools 2 for its handling.
    In contrast to conventional forging devices of this type, the dome rod 5 is provided with a rotary drive 10, which is driven via a control device 11 in dependence on the rotational position of the forging mandrel 4 with respect to each one working stroke exporting forging tools 2. This means, for example, in the event that the forging mandrel 4 according to FIGS. 2 and 3 is provided with distributor lines 12 for means for lubricating and / or treating the inner surfaces of the hollow body 3, that the preferably opening in longitudinal grooves 13 of the forging mandrel 4 outlet openings of the distribution lines 12 are always outside of the inner shape of the hollow body 3 determining molding surfaces 14 of the forging mandrel 4 and therefore leave no conditional on the inner surface of the hollow body 3 due to the influence of Schmiedewerk- 5 * * witness 2 surface marks. By providing longitudinal grooves 13 of the forging mandrel 4 is subdivided into mandrel segments, each forming a molding surface, but this is not mandatory. Thus, for example, the rotary drive 10 could also be used to suspend certain peripheral portions of the forging mandrel more or less the burden of the forging tools 2, to avoid local overloads of the forging mandrel 4 or to ensure uniform wear of the forging mandrel 4, if necessary. In addition, the rotary drive 10 can also be used to make the connection of the forging mandrel 4 with the mandrel rod 5 or for releasing this connection, if this connection is made via a mutual rotational adjustment between the mandrel 5 and the forging mandrel 4, as in a screw 15 according to the Fig. 2 or a bayonet lock is the case.
    权利要求:
    Claims (4)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. 1. A device for forging a hollow body (3) with centrally symmetrically arranged about a forging axis, drivable in the sense of radial strokes forging tools (2) and with a rotatably mounted on a mandrel bar (5) provided forging dome (4), characterized in that on the mandrel rod (5) a rotary drive (10) engages and that the rotary drive (10) via a control device (11) in dependence on the rotational position of the forging mandrel (4) relative to the each one working stroke exporting forging tools (2) is controlled.
    [2]
    2. Apparatus according to claim 1, characterized in that the forging mandrel (4) over its circumference distributed molding surfaces (14) for the cavity of the hollow body (3) and that the control device (11) the rotary drive (10) for the mandrel rod (5 ) in response to the rotational position of the mold surfaces (14) relative to the respective one working stroke exporting forging tools (2) controls.
    [3]
    3. Apparatus according to claim 2, characterized in that between the molding surfaces (14) of the forging mandrel (4) outlet openings of manifolds (12) are provided for means for lubricating and / or treating the inner surface of the hollow body (3).
    [4]
    4. Apparatus according to claim 3, characterized in that the outlet openings of the distributor lines (12) in longitudinal grooves (13) open, which divide the forging mandrel (4) in the individual forming surfaces (14) forming mandrel segments. Linz, on August 11, 2011 GFM-GmbH by: <
    类似技术:
    公开号 | 公开日 | 专利标题
    EP2552614B1|2017-07-12|Process for manufacturing wheel axles, in particular for railway carriages
    DE1175192B|1964-08-06|Method and device for ironing strangfoermigem good, z. B. Band
    AT511745B1|2014-09-15|DEVICE FOR FORGING A HOLLOW BODY
    AT511748B1|2014-04-15|DEVICE FOR FORGING A HOLLOW BODY
    DE2940473A1|1981-01-15|METHOD AND DEVICE FOR PRODUCING METAL PROFILES
    DE102013219310A1|2015-03-26|Process for hot forging a seamless hollow body made of material that is difficult to form, in particular of steel
    DE102014212732B4|2022-02-24|Process and upsetting device for the production of offset workpieces such as shafts or rods
    DE212008000083U1|2010-08-12|Büchsenaufweitvorrichtung
    EP1132161B1|2005-05-04|Process for continuous casting slabs, especially thin slabs
    DE2157086A1|1972-06-15|Method and apparatus for manufacturing metal pipes by extruding a hollow blank
    WO2008003305A1|2008-01-10|Method for the production of a rotationally symmetrical part, and part produced according to said method
    DE102013100302B4|2017-02-02|Method for forging, in particular stretch forging, of metallic workpieces
    AT517326B1|2018-11-15|Method for producing a metallic tube, method for operating a seamless tube system, bumper and seamless tube system
    DE102011105244A1|2012-08-09|Use of a heat upsetting method, use of a forming tool, method of producing a forging preform and forming apparatus or heat upsetting apparatus
    DE965901C|1957-06-27|Process for the manufacture of rolls for block rolling mills with increased gripping ability
    DE3935190C2|1991-10-17|
    DE102018112391A1|2019-07-25|Method of rolling a hollow block on a plug mill, plug mill, use of a plug mill and plug line
    DE2812778C2|1983-03-17|Plant for the production of seamless tubes
    DE102007005778A1|2007-09-13|Continuous casting plant and method for operating a continuous casting plant
    DE102010046808A1|2012-03-29|Method and device for producing a guide segment for spherical roller bearings or the like
    DE695327C|1940-08-22|Process for the hot rolling of metals, especially stainless steels
    DE1758560B2|1975-10-02|Continuous process for the production of a fine-grained starting material for fine aluminum wires according to the casting and rolling process
    AT248365B|1966-07-25|Method and device for the production of cold-formed reinforcing steel strands for concrete construction from rolled steel
    AT215933B|1961-06-26|Fixed rolled or stopper rods subject to tensile stress and processes for the production of hollow blanks and seamless tubes with the help of such rods
    DE465229C|1928-09-11|Method for stretching out solid or hollow-walled bodies
    同族专利:
    公开号 | 公开日
    DE102012107375A1|2013-02-14|
    DE102012107375B4|2021-02-25|
    AT511745B1|2014-09-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH339466A|1955-02-26|1959-06-30|Fertigungstechnik Und Maschine|Process for producing ring-shaped or cup-shaped workpieces and forging machine for performing the process|
    WO2009146715A1|2008-06-02|2009-12-10|Aft Advanced Forging Technologies Gmbh|Bush widening apparatus and process for forging a bush blank|
    DE102007032804B3|2007-07-10|2008-09-04|V&M Deutschland Gmbh|Forging mandrel for hot-forging of tubular work-pieces made of metal has a mandrel body made from heat-resistant material and a mandrel rod|
    EP2067542B1|2007-12-07|2012-03-07|SMS Meer GmbH|Method and rolling mill to produce wireless steel pipes|
    DE102009052482A1|2009-02-11|2010-08-19|Sms Meer Gmbh|Method and device for producing tubular workpieces from a pre-punched hollow block|DE102013219310A1|2013-09-25|2015-03-26|Gfm Gmbh|Process for hot forging a seamless hollow body made of material that is difficult to form, in particular of steel|
    CN106964660B|2017-05-04|2018-09-18|太原科技大学|A kind of long core bar device subtracting wall for metal pipe material cold-drawn|
    CN112139418B|2020-09-08|2021-12-10|西安交通大学|Four-hammer progressive radial forging device and process for inner gear ring rigid wheel of harmonic reducer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1172/2011A|AT511745B1|2011-08-12|2011-08-12|DEVICE FOR FORGING A HOLLOW BODY|ATA1172/2011A| AT511745B1|2011-08-12|2011-08-12|DEVICE FOR FORGING A HOLLOW BODY|
    DE102012107375.9A| DE102012107375B4|2011-08-12|2012-08-10|Device for forging a hollow body|
    [返回顶部]