• 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 (18) from a pre-punched hollow block (1) with forging tools (2) drivable radially to a forging axis, with a collet (16) movable on a guide bed (5) in the direction of the forging axis ) for the hollow block (1) having clamping head (3) and with a on the side facing away from the forging tools (2) side of the clamping head (3) described, independently of this along the guide bed (5) movable mandrel carriage (4), whose mandrel rod (12) provided with a forging mandrel (13) passes through the clamping head (3) coaxially with the forging axis. In order to provide advantageous design conditions, it is proposed that the mandrel carriage (4) has an axial actuating drive (10) for the mandrel rod (12) and tensile strength with the clamping head (3) can be coupled.
    公开号:AT514894A1
    申请号:T50617/2013
    申请日:2013-09-25
    公开日:2015-04-15
    发明作者:
    申请人:Gfm Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for forging a hollow body from a pre-hollow block with radially driven to a forging axis forging tools, with a movable on a guide bed in the direction of the forging axis, collets for the hollow block having chuck and with a remote from the forging tools side arranged the clamping head, independently of this along the guide bed movable mandrel carriage, provided with a forging mandrel mandrel passes through the clamping head coaxial with the forging axis.
    For forging long, tubular hollow body of a pre-hollow block, it is known (EP 2 218 526 B1) to detect the hollow block in the region of an end face by the collets of a clamping head having a through hole coaxial with the collets, so that the forging mandrel for the following Forging of the hollow block between forge tools can be acted upon radially by forging tools using a mandrel through the through hole of the clamping head can be inserted into the hollow block. This is ensured by the fact that the clamping head and the mandrel carriage receiving the mandrel rod are movable independently of one another along a common guide bed. Since the forging mandrel is performed within the through-hole through the chuck, the opposite of the forging mandrel offset in diameter, connected to a rotary drive in the mandrel carriage mandrel requires a separate bearing piece in order to perform centrally in the through hole. This known forging is suitable for comparatively long, tubular workpieces, but not for the forging of pre-hollow blocks of difficult to transform materials, because when forging such Werkstü bridge considerable forces between the chuck and the mandrel carriage occur that would have to be removed via the guide bed.
    In order to shorten the length of forging, in which the perforated hollow block is clamped axially between a chuck and an anvil, it is also known (DE 195 23 280 C2) to store the mandrel in the chuck and provided with an axial actuator so the mandrel can be displaced axially in particular for the forging of hollow bodies with a remote inner diameter relative to the clamping head. Apart from the fact that the axial clamping of the pre-punched hollow block between a chuck and an anvil requires additional design effort, there are also significant restrictions on the field of use of such forging.
    The forging of a pre-punched hollow block over a forging mandrel is used for economic considerations, especially for tubular workpieces to be produced in relatively small lots. This generally means that the forging device should be easily convertible in order to adapt to the different workpiece specifications can. In this context, there is the requirement to design a device for forging hollow bodies in such a way that simple retooling can be ensured without restricting the field of application, for example to forging comparatively long tubular hollow bodies or forging hollow bodies from a material which is difficult to deform To have to buy.
    Starting from a device of the type described, the invention solves the problem set by the fact that the mandrel carriage has an axial actuator for the mandrel and tensile strength with the clamping head can be coupled.
    As a result of these measures, the device can be used in a known manner for forging comparatively long tubular workpieces, which requires a mandrel carriage which can be moved independently of the clamping head. Compared with known forging devices of this type results from the axial actuator for the mandrel bar in the mandrel carriage the additional advantage that the forging mandrel can be axially displaced even when locked against the guide bed mandrel carriage. The high-tensile coupling between the chuck and the mandrel carriage is an advantageous prerequisite for the forging of hollow bodies made of a material difficult to deform because the forces occurring between the chuck and the mandrel carriage can be removed directly via the clutch and do not burden the guide bed. The axial movement of the forging mandrel with respect to the chucking head required for such a high-tensile coupling of the chuck head and mandrel carriage is ensured by the axial adjusting drive for the mandrel bar associated with the mandrel carriage. The axial feed of the hollow body to be forged compared to the forging tools is achieved in a conventional manner via a drive of the clamping head.
    In order to meet different forging requirements, the forging mandrel is also to rotate about its axis, wherein the running during the idle stroke of the forging tools rotational steps in the sense of workpiece rotation on the collets or opposite can be performed. For this purpose, the mandrel carriage need only have a corresponding rotary drive for the mandrel, which is driven accordingly.
    The temperature load of the forging mandrel can be limited by suitable cooling measures. The additional axial actuator for the mandrel bar also opens the possibility to move the forging mandrel axially relative to the forging tools, so that the heat input during forging-related pressing of the workpiece can be distributed to the forging mandrel over a greater length range of the forge mandrel. The same applies if the forging mandrel is moved in opposite directions to the forging tools. In order to be able to comply with advantageous working conditions in this regard, a control device for controlling the axial adjusting drive and / or the rotary drive for the mandrel rod can be provided as a function of the temperature of the forging mandrel. If the forging mandrel has a minimum length corresponding to the travel range of the axial positioning drive, the result is a length which is favorable for an advantageous axial temperature distribution for the forging mandrel.
    In the drawing, the subject invention is shown, for example. It show the
    1 to 4 an inventive device for forging a hollow body in different working positions in a simplified, purely schematic longitudinal section,
    5 shows the position of the device for exchanging a mandrel bar,
    Fig. 6 the chuck and the mandrel carriage in the coupling position in a larger scale and the
    FIGS. 7 and 8 show two different working positions for the clamping head coupled to the mandrel carriage.
    The illustrated apparatus for forging a hollow body from a pre-punched hollow block 1 has forging tools 2 which can be driven radially to a forging axis, to which a clamping head 3 and in mandrel slides 4 are arranged upstream. The clamping head 3 and the mandrel carriage 4 are mounted displaceably on a common guide bed 5 and can be moved independently of each other via travel drives 6 and 7 along the common guide bed 5. The travel drives 6, 7 may include, for example, in a rack 8 engaging drive pinion.
    The mandrel carriage 4 is provided with a mandrel bar receptacle 9, which can be displaced axially by means of an actuator 10. As actuator 10 actuating cylinder 11 are indicated. To not only axially displace the mandrel 12 with the forging mandrel 13 with respect to the mandrel carriage 4, but also to be able to rotate in rotation steps around the mandrel axis, the correspondingly rotatably mounted mandrel rod receptacle 9 is connected to a rotary drive 14.
    The chuck 3 is penetrated by the mandrel 12 in a guide opening 15, wherein the forging mandrel 13 projects axially beyond the chuck 3 and extends coaxially to the collets 16 of the chuck 3, with the help of which the hollow block to be forged 1 is clamped forging. The pre-hollow block can be made closed in the region of one end. However, he is to stretch in the area of his open end.
    As can be seen from FIG. 1, the clamping head 3 and the mandrel carriage 4 are moved against the forging tools 2 for clamping the loading position coaxial with the forging axis, the forging mandrel 13 being inserted into the opening of the hollow block 1 and the collets 16 detect the hollow block, as shown in FIG. 2 can be seen. The hollow block 1 clamped in this way can now be moved into a forging position according to FIG. 3, in which the forging mandrel 13 is advanced through the hollow block 1 with the aid of the mandrel carriage 4 between the forging tools 2, as shown in FIG. In this displacement position, the mandrel carriage 4 is locked to the guide bed 5 via a locking device 17. The hollow block 1 can thus be subjected via the chuck 3 for forging over the forging mandrel 13 a corresponding feed, wherein the axial feed via the drive 6, a rotary feed over the correspondingly driven collets 16 can be superimposed. During the forging process, the axial actuating drive 10 for the mandrel bar 12 can be actuated via a control device, so that the forging mandrel 13 is displaced in the axial direction with respect to the forging tools 2. This axial displacement of the forging mandrel 13 can be used to forge a hollow body set down with respect to its inner diameter when the forging mandrel 13 has correspondingly offset diameter ranges. The displacement of the forging mandrel 13 relative to the forging tools 2 can also be used advantageously to reduce the thermal load of the forging mandrel 13, because the range of the transferred during the forging load through the forging tools 2 amount of heat are distributed over the mandrel length by the axial displacement of the forging mandrel 13 can. Advantageous design conditions arise in this context when the mandrel length corresponds at least to the travel of the axial actuator 10.
    4, the end of the forging process is shown. The forged from the pre-hollow block 1 hollow body 18 is released in the usual of the collets 16 of the clamping head 3 to pull it from the opposite end between the forging tools 2 forging the hollow body end. It can be seen that the forging mandrel 13 has been correspondingly displaced via the axial adjusting drive 10 of the mandrel carriage 4 with respect to its starting position according to FIG. 3.
    In Fig. 5, the position of the device is shown for mandrel change. The forging mandrel 13 with the mandrel 12 is pulled from the side of the collets 16 forth from the mandrel rod holder 9 of the mandrel carriage 4 through the guide opening 15 of the chuck 3, for this purpose together with the mandrel carriage 4 to the end facing away from the forging tools 2 Guide bed 5 is relocated. The shared in this way forging mandrel 13 can thus be changed together with the mandrel 12 and a new forging mandrel 12 are introduced with a mandrel in the reverse direction through the guide opening 15 of the clamping head 3 in the mandrel rod holder 9 of the mandrel carriage 4.
    As can be seen from FIG. 6, the clamping head 3 and the mandrel carriage 4 can be locked in a tension-proof manner with each other via a coupling device 19. The locking can be done by bolts 20 which engage releasably in radial locking recesses 21, so that the clamping head 3 is mechanically connected to the mandrel carriage 4 to form a unit which receives axial forces between the collets 16 and the forging mandrel 13 without loading the guide bed 5. In the coupling position shown in FIG. 6 hollow body can be forged, in which high forming forces are required. 7 and 8 show, for example, the forging of a hollow body of a hard-to-form, pre-punched hollow block 1, wherein the assembly formed from the clamping head 3 and the mandrel carriage 4 is advanced against the forging tools 2 via the drive 6 of the clamping head 3. The forging mandrel 13 therefore requires a length corresponding to the length of the hollow block 1 if the forging mandrel is not displaced beyond the setting drive in opposition to the forging advance of the hollow block. In the case of short hollow blocks 1, under some circumstances it may be advantageous to additionally displace the forging mandrel 13 in the feed direction of the clamping head 3, which, however, requires an extension of the forging mandrel 13. FIG. 8 shows the position in which the clamping head 3 has to release the hollow block 1 in order to be able to forge the end of the hollow block 1.
    权利要求:
    Claims (4)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. 1. Apparatus for forging a hollow body (18) from a pre-punched hollow block (1) with forging tools (2) drivable radially to a forging axis, with one on a guide bed (5) in Direction of the forging axis movable, collets (16) for the hollow block (1) having clamping head (3) and arranged on the side facing away from the forging tools (2) side of the clamping head (3), independently of this along the guide bed (5) movable Mandrel carriage (4) whose mandrel rod (12) provided with a forging mandrel (13) penetrates the clamping head (3) coaxially with the forging axis, characterized in that the mandrel carriage (4) has an axial actuating drive (10) for the mandrel rod (12) and tensile strength with the clamping head (3) can be coupled.
    [2]
    2. Apparatus according to claim 1, characterized in that the mandrel carriage (4) has a rotary drive (14) for the mandrel rod (12).
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that a control device for controlling the axial actuating drive (10) and / or the rotary drive (14) for the mandrel rod (12) in dependence on the temperature of the forging mandrel (13) is provided.
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the forging mandrel (13) has a minimum length corresponding to the travel of the axial actuating drive (10). Linz, on 25 September 2013 GFM - GmbH by: / DI Helmut Hübscher / (electronically signed)
    类似技术:
    公开号 | 公开日 | 专利标题
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    DE862139C|1953-01-08|Rolling mill for rolling seamless tubes from hollow blocks
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    同族专利:
    公开号 | 公开日
    EP2853319A1|2015-04-01|
    AT514894B1|2016-04-15|
    US9862012B2|2018-01-09|
    EP2853319B1|2017-02-22|
    US20150082846A1|2015-03-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102010014583A1|2010-04-09|2011-10-13|Felss Gmbh|Establishment of a rotary swaging machine with a workpiece holder and a mandrel bar holder|
    DE553623C|1930-05-21|1933-11-06|Leopold Tschulenk|Pilgrim tube rolling mill|
    AT305734B|1971-05-06|1973-03-12|Gfm Gesselschaft Fuer Fertigun|Forging machine for internal profiling of tubular workpieces|
    AT322329B|1973-12-04|1975-05-12|Gfm Fertigungstechnik|FORGING MACHINES FOR PRODUCING IN PARTICULAR SCRAP BARRELS|
    DE2636636B2|1976-08-13|1978-07-13|Fritz Werner Industrie-Ausruestungen Gmbh, 6222 Geisenheim|Process and rotary swaging machine for internal profiling of tubular workpieces with one-sided cross-section expansion of the internal profile|
    DE4041668A1|1990-12-22|1992-07-02|Walter E Spaeth|Hollow metal profile bending - has mandrel to fill the hollow interior on entry to the bending rollers|
    DE19523280C2|1995-06-27|2002-12-05|Gfm Gmbh Steyr|Forging machine for internal profiling of tubular workpieces|
    AT501152B8|2003-12-30|2007-02-15|Gfm Beteiligungs & Man Gmbh|METHOD AND DEVICE FOR PRODUCING A CYLINDRICAL HOLLOW BODY FROM A BOARD|
    DE102009052482A1|2009-02-11|2010-08-19|Sms Meer Gmbh|Method and device for producing tubular workpieces from a pre-punched hollow block|
    RO127383A2|2010-09-03|2012-05-30|Mb Telecom Ltd S.R.L.|Method and system for manufacturing hollow and profiled bodies|CN107008841A|2017-06-05|2017-08-04|威海多晶钨钼科技有限公司|A kind of manufacture device of the T-shaped parts of molybdenum and its alloy|
    CN111715831A|2020-06-05|2020-09-29|成都先进金属材料产业技术研究院有限公司|Core rod die-sticking-free device and method in core rod-containing rotary forging process|
    法律状态:
    2020-08-15| MM01| Lapse because of not paying annual fees|Effective date: 20190925 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50617/2013A|AT514894B1|2013-09-25|2013-09-25|Apparatus for forging a hollow body from a pre-punched hollow block|ATA50617/2013A| AT514894B1|2013-09-25|2013-09-25|Apparatus for forging a hollow body from a pre-punched hollow block|
    EP14183028.1A| EP2853319B1|2013-09-25|2014-09-01|Device for forging a hollow body from a pre-perforated hollow block|
    US14/494,736| US9862012B2|2013-09-25|2014-09-24|Apparatus for forging a hollow body from a pre-perforated hollow block|
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