WO1999015303A1 - Rolling device for generating pressured internal stress in a component - Google Patents

Rolling device for generating pressured internal stress in a component Download PDF

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Publication number
WO1999015303A1
WO1999015303A1 PCT/DE1998/002821 DE9802821W WO9915303A1 WO 1999015303 A1 WO1999015303 A1 WO 1999015303A1 DE 9802821 W DE9802821 W DE 9802821W WO 9915303 A1 WO9915303 A1 WO 9915303A1
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WO
WIPO (PCT)
Prior art keywords
rolling
carrier
rolling device
notch
holder
Prior art date
Application number
PCT/DE1998/002821
Other languages
German (de)
French (fr)
Inventor
Hans Wagner
Dieter Thiele
Claus Feige
Original Assignee
Siemens Aktiengesellschaft
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Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999015303A1 publication Critical patent/WO1999015303A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
    • B23P9/02—Treating or finishing by applying pressure, e.g. knurling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor

Definitions

  • Rolling device for generating residual compressive stresses in a component
  • the invention relates to a rolling device for generating residual compressive stresses in a notch running along a wall of a material recess in a component, in particular in a turbine runner.
  • the rolling device has a positioning element which is elongated and displaceable along a longitudinal axis, a spherical rolling element arranged along a transverse axis and a force transmission system.
  • the transverse axis runs essentially orthogonally to the longitudinal axis, and the force distribution system can be used to transmit a force directed away from the longitudinal axis in the direction of the transverse axis to the rolling element.
  • m notches which are essentially orthogonal to a main direction of expansion of the material recess, can generate residual compressive stresses that run largely parallel to the main direction of expansion of the material recess. This is particularly advantageous for material recesses for receiving turbine blades in a turbine runner, since the main direction of expansion of the material recess coincides with the load direction as a result of the centrifugal forces that occur.
  • Such a rolling device is described in DE 195 16 834 AI.
  • This rolling device preferably has a rolling element with a hydraulically mounted ball, which can be pressed at high pressure onto the surface of the notch via a hydraulic system with a high-pressure pump.
  • the rolling device can be designed as an almost universal tool with a positioning part and a single rolling element, as a result of which a rough adjustment takes place via the positioning part and a fine adjustment within the material recess via the rolling element.
  • the rolling device can be used for a time-efficient deep rolling for a large number of material recesses of the same geometry with several rolling ten be executed, which are opposite and in different positions along a longitudinal axis of the rolling device s nd.
  • the rolling elements can be interchangeable, so that both a deep rolling and a smooth rolling of the corresponding notch is possible with a rolling device.
  • This known rolling device has been preserved, but is in need of improvement for use in the fir tread grooves of a turbine runner for anchoring turbine blades with an axially curved course, for which the known rolling device requires special control devices and with which the generation of an inherent pressure stress on the Edges of the component are not readily possible
  • DE 40 15 205 Cl is a tool for pressing a groove with a circular groove base in cross section ???? described.
  • a groove is present, for example, in the base parts of rotor blades, these base parts having a fir tree-like structure in which increased stress peaks occur in the base of the groove. For deep rolling the grooves, this shows
  • Tool balls that are guided close to each other in m guideways, effectively forming a ball chain. Rolling along under pressure creates rolling tracks through the balls in the groove base.
  • the tool is used exclusively for deep-rolling a groove with a groove base that is circular in cross-section, since in the described tool it must be ensured that the balls arranged in the guide track roll off.
  • DE 36 01 541 AI and DE 23 11 476 AI each describe a tool for machining cylindrical workpiece bores.
  • DE 25 21 192 specifies a tool for finishing by deforming the inner rotating surfaces in workpieces.
  • the tool is arranged along a geometrical axis of a linearly displaceable to the machined surface and contains a housing, which represents a rotating body, at least on its lateral surface an annular groove for accommodating deforming elements, each of which represents a rotating body, is formed.
  • the tool of the housing has jacket surfaces which are conical with a cone angle which corresponds to the cone angle of the ???? Surface of a workpiece is approximately the same.
  • three ring grooves are machined perpendicular to its axis to accommodate the deforming elements.
  • the invention is therefore based on the problem of improving the rolling device of the type mentioned at the outset in such a way that compressive residual stresses along a wall of a notch running in a material recess of a component, including the edge region at the beginning and at the end of the notch, can be generated quickly and easily.
  • a rolling device of the type mentioned at the outset it is proposed in a rolling device of the type mentioned at the outset, according to the invention, to arrange at least one holder for a spherical rolling element on a support which is movable at least along the notch, the holder being tiltable as a two-armed lever on the support about an axis running parallel to the notch is arranged, and to provide a force transmission system between the carrier and the rolling element for setting a rolling force directed transversely to the course of the notch.
  • the rolling device can be designed with great inherent rigidity, so that high, adjustable by means of the force transmission system, transverse to the course of the Let the notch produce directed rolling forces. These lead to residual compressive stresses along a loading axis of the component in a notch running approximately perpendicular to the loading axis, which can have a curvature lying in a cross section parallel to the loading axis.
  • the notch is then rolled down over a plurality of tracks aligned along the loading axis, each track only grasping part of the notch.
  • the rolling device is particularly suitable for deep-rolling holders in profile grooves and other holding grooves for turbine blades and similar components.
  • a plurality of holders can preferably be arranged as two-armed levers on the carrier such that they can be tilted on an axis running parallel to the notch, the force transmission system in the carrier engaging in each case at one end of a lever and a spherical rolling element being arranged at the other end of the lever.
  • a relatively small spring system or a hydraulic system can be used to set a high rolling force, which can be different for each rolling element.
  • a power transmission other than lever can be selected depending on the requirement.
  • the lever ratio can also be changed, for example by moving the axis to rotate the holder.
  • the carrier can be rotatable about an axis perpendicular to the course of the notch, be fastened to a machine spindle and have support and guide rollers which can be placed on the carrier on the walls of the profile grooves.
  • the carrier can either be rotatable with respect to the machine spindle, or it can be non-rotatably fastened in a tool holder of the machine spindle while the machine spindle is freely rotatable during the rolling process.
  • the support and guide rollers essentially serve to guide the rolling device when it is inserted into a material recess, while the stitch spindle absorbs the rolling force.
  • they can be arranged on the carrier in an adjustable manner by means of an eccentric bearing.
  • a two-armed lever allows the pressing force m of the notch to be applied in such a way that directed compressive residual stresses are generated along the wall and in particular along the edge area at the beginning and at the end.
  • the rolling element is below the next plane to be consolidated, for example in the case of a revolving upward movement of the rolling device.
  • the lever allows the pressing force to be exerted on the plane in accordance with the contour to be driven over. This allows the application of a force not only perpendicular to the axis of the lever but also at an angle to it.
  • the rolling device according to the invention is particularly suitable for generating residual compressive stresses in a pine profile groove of a wheel disk of a turbine rotor for anchoring a turbine blade if three levers on the carrier are arranged offset in the direction of the groove and at the height of the notches in the groove, the preload of the spring system of each lever is adjustable by means of an adjusting screw and the support and guide rollers are arranged on the inlet-side area of the carrier so as to be essentially free of play against opposite walls of the groove.
  • a hydraulic system can also be used.
  • FIG. 1 is a partial side view of a wheel disc of a turbine runner with fir profile grooves for receiving turbine blades
  • FIG. 2 is a partial plan view of a wheel disc with curved fir profile grooves
  • FIG. 3 shows a side view of a rolling device according to the invention
  • FIG. 4 shows a front view of the rolling device according to FIG. 3,
  • FIG. 5 is a plan view of the rolling device according to FIG.
  • FIG. 6 shows a development of the rolling device according to FIG. 5.
  • a wheel disk 4 of a turbine rotor which is only partially shown, and which is the component that is to be provided with residual compressive stresses with a rolling device 1 according to the invention, has material recesses 3 in its circumference in the form of pine profile grooves, which run in the axial direction. These fir profile grooves 3 have essentially parallel walls 2, with opposite notches
  • Figure 2 shows a plan view of the wheel disc 4 of Figure 2.
  • the deep rolling of metallic components that have notches for holding components, such as. B. Holding grooves for anchoring turbine blades in a turbine rotor, which are subject to operational centrifugal loads that act along a load axis perpendicular to the notches, is carried out with the aim of durability, in particular the durability under vibration crack corrosion attacks increase.
  • the surface deformation is partly elastic and partly plastic. On the one hand, it leads to an increase in the hardness of the processed material on its surface and layers close to the surface, and on the other hand to the development of residual compressive stresses on and under the surface. These residual compressive stresses may be suitable for preventing crack growth from the surface into the material.
  • the rolling device 1 is non-rotatably attached to a tool holder (not shown in detail) of a machine spindle 6 and has a carrier 7 for three holders 8 in the form of two-armed levers for crowned rolling elements 9.
  • Each of these holders 8 can be tilted about a tilt axis 11 which essentially m in the direction of the material recess 3, ie. H. of the fir profile groove.
  • Each end of the holder 8 lying in the carrier 7 is acted upon by a force transmission system 10 m in the form of a spring system, the force determining the rolling force of which can be set separately for each holder 8 by means of adjusting screws 15.
  • the power transmission system 10 can alternatively also be designed as a hydraulic system, which ensures a particularly precise power transmission.
  • FIG. 4 shows a front view of the rolling device 1 according to FIG. 3.
  • a bracket 16 is attached, with two supports 14 for a pair of support and guide rollers 13 are rotatably and lockably mounted.
  • the console 16 can be a pedestal.
  • the support and guide rollers 13 are mounted eccentrically on the carriers 14, so that the distance between the support and guide rollers 13 can be changed by rotating the carrier 14 and can be adapted to the distance between the walls 2 of a fir profile groove 3, so that the support and Guide rollers 13 rest against these walls 2 essentially without play.
  • the carriers 14 have, for example, an eccentric end bore for the support and guide roller axis.
  • Figure 5 shows how the rolling device 1 according to the invention on the workpiece, i. H.
  • a wheel disk 4 of a turbine rotor is positioned and aligned with respect to a fir-groove 3.
  • the contact pressure of the roller elements 9 against the notches 5 required to generate residual compressive stresses is set separately for each roller element 9 via the preloads of each individual spring system 10 by means of the adjusting screws 15.
  • the machine spindle 6 is unlocked and, guided by the support and guide rollers 13, can rotate freely about its axis 12 and thus follow the course of the fir profile groove 3.
  • the axis 12 can be defined by a clamping pin which specifies the axis of rotation.
  • the torque generated by the outer holder 8 or rolling element 9 about the axis 12 is compensated for by the support and guide rollers 13. These generate an opposite torque, which is used for guidance along the course of the fir tree profile 3.
  • the rolling device 1 is guided line by line through a fir profile groove 3 or a recess in another component until the individual rolling elements 9 emerge from the wheel disk via the edges of the fir profile groove 3 and also roll these edges down.
  • the line-by-line feed takes place via the feed of the mesh spindle 6, on which the rolling device 1 is held.
  • the movement of the rolling device 1 with respect to the component 4, in this case the wheel disc of a turbine rotor, can be controlled by means of an NC control.
  • Figure 6 shows a development of the rolling device according to Figure 5.
  • a bracket 16 is applied, in which two supports 14 for a pair of support and
  • Guide rollers 13 are rotatably and lockably mounted.
  • the console 16 is designed as a bearing block, in which the support and guide rollers 13 are mounted eccentrically. Characterized in that at each end of the carrier 7 there is the possibility of receiving or introducing a torque about the axis 12 of the carrier 7, the rolling device can not only change the direction of travel without problems. Rather, this enables multiple guiding, particularly in the case of round notches, which further increases the accuracy.
  • the rolling device according to the invention can be designed for rapid deep rolling of a large number of material recesses in the same geometry with several rolling elements.
  • the rolling elements can be exchangeable, so that both deep rolling and smooth rolling of the corresponding notches are possible with a single rolling device.

Abstract

The invention relates to a rolling device for generating pressured internal stress in a chamfer (5) running along the wall (2) of a material recess (3) in a component (4), comprising at least one carrier (7) which can move along said chamfer, at least one fixing device (8) for a crowned rolling member (9) arranged upon the carrier (7) and staggered in the direction of the chamfer (5) and in relation to height, in addition to a power transmission system (10) located between the carrier (7) and the rolling member in order to adjust the rolling force directed across the path of the chamfer (5).

Description

Beschreibungdescription
Walzvorrichtung zum Erzeugen von Druckeigenspannungen in einem BauteilRolling device for generating residual compressive stresses in a component
Die Erfindung betrifft eine Walzvorrichtung zum Erzeugen von Druckeigenspannungen in einer entlang einer Wandung einer Ma- terialausnehmung eines Bauteils, insbesondere eines Turbinen- laufers verlaufenden Kerbe. Die Walzvorrichtung hat ein ent- lang einer Langsachse gestrecktes und verschiebliches Posi- tiomerungsteil, ein entlang einer Querachse angeordnetes, balliges Walzelement und ein Kraftubertragungssystem. Die Querachse verlauft im wesentlichen orthogonal zur Langsachse, und mit dem Krafterteilungssystem ist eine von der Langsachse weg gerichtete Kraft in Richtung der Querachse auf das Walzelement übertragbar. Hierdurch können m Kerben, welche im wesentlichen orthogonal zu einer Hauptausdehnungsrichtung der Mateπalausnehmung verlaufen, Druckeigenspannungen erzeugt werden, die weitgehend parallel zur Hauptausdehnungsrichtung der Materialausnehmung verlaufen. Dies ist insbesondere für Mateπalausnehmungen zur Aufnahme von Turbmenschaufein m einem Turbinenlaufer gunstig, da die Hauptausdehnungsrichtung der Materialausnehmung mit der Belastungsrichtung infolge der auftretenden betrieblichen Fliehkräfte zusammenfallt.The invention relates to a rolling device for generating residual compressive stresses in a notch running along a wall of a material recess in a component, in particular in a turbine runner. The rolling device has a positioning element which is elongated and displaceable along a longitudinal axis, a spherical rolling element arranged along a transverse axis and a force transmission system. The transverse axis runs essentially orthogonally to the longitudinal axis, and the force distribution system can be used to transmit a force directed away from the longitudinal axis in the direction of the transverse axis to the rolling element. In this way, m notches, which are essentially orthogonal to a main direction of expansion of the material recess, can generate residual compressive stresses that run largely parallel to the main direction of expansion of the material recess. This is particularly advantageous for material recesses for receiving turbine blades in a turbine runner, since the main direction of expansion of the material recess coincides with the load direction as a result of the centrifugal forces that occur.
Eine derartige Walzvorrichtung ist in der DE 195 16 834 AI beschrieben. Diese Walzvorrichtung hat vorzugsweise ein Walzelement mit einer hydraulisch gelagerten Kugel, die über ein Hydrauliksystem mit einer Hochdruckpumpe an die Oberflache der Kerbe mit hohem Druck anpreßbar ist. Die Walzvorrichtung kann als nahezu universales Werkzeug mit einem Positionie- rungsteil und einem einzigen Walzelement ausgebildet sein, wodurch über das Positionierungsteil eine Grobjustierung und über das Walzelement eine Feinjustierung innerhalb der Mate- rialausnehmung erfolgt. Die Walzvorrichtung kann für ein zeiteffizientes Festwalzen für eine große Anzahl von Mate- rialausnehmungen gleicher Geometrie mit mehreren Walzeiemen- ten ausgeführt sein, die einander gegenüberliegend und in verschiedenen Positionen entlang einer Langsachse der Walzvorrichtung angeordnet s nd. Die Walzelemente können auswechselbar sein, so daß mit einer Walzvorrichtung sowohl ein Festwalzen als auch ein Glattwalzen der entsprechenden Kerbe möglich ist. Diese bekannte Walzvorrichtung hat sich bewahrt, ist jedoch verbesserungswurdig für den Einsatz in den Tannen- profilnuten eines Turbinenlaufers zur Verankerung von Turbi- nenschaufeln mit m axialer Richtung gebogenem Verlauf, für die die bekannte Walzvorrichtung besonderer Steuerungsvorrichtungen bedarf und mit der das Erzeugen einer Druckeigenspannung an den Kanten des Bauteils nicht ohne weiteres mög¬Such a rolling device is described in DE 195 16 834 AI. This rolling device preferably has a rolling element with a hydraulically mounted ball, which can be pressed at high pressure onto the surface of the notch via a hydraulic system with a high-pressure pump. The rolling device can be designed as an almost universal tool with a positioning part and a single rolling element, as a result of which a rough adjustment takes place via the positioning part and a fine adjustment within the material recess via the rolling element. The rolling device can be used for a time-efficient deep rolling for a large number of material recesses of the same geometry with several rolling ten be executed, which are opposite and in different positions along a longitudinal axis of the rolling device s nd. The rolling elements can be interchangeable, so that both a deep rolling and a smooth rolling of the corresponding notch is possible with a rolling device. This known rolling device has been preserved, but is in need of improvement for use in the fir tread grooves of a turbine runner for anchoring turbine blades with an axially curved course, for which the known rolling device requires special control devices and with which the generation of an inherent pressure stress on the Edges of the component are not readily possible
In der DE 40 15 205 Cl ist ein Werkzeug zum Festpressen einer Nut mit im Querschnitt kreisförmigen Nutgrund ???? beschrieben. Eine solche Nut liegt beispielsweise m den Fußteilen von Rotorschaufeln vor, wobei diese Fußteile eine tannenbaumartige Struktur aufweisen, in der Nutgrund erhöhte Span- nungsspitzen auftreten. Zum Festwalzen der Nuten weist dasDE 40 15 205 Cl is a tool for pressing a groove with a circular groove base in cross section ???? described. Such a groove is present, for example, in the base parts of rotor blades, these base parts having a fir tree-like structure in which increased stress peaks occur in the base of the groove. For deep rolling the grooves, this shows
Werkzeug Kugeln auf, die m Fuhrungsbahnen dicht aneinander- liegend, quasi eine Kugelkette bilden, gefuhrt sind. Durch ein Entlangwalzen unter Druck werden durch die Kugeln in dem Nutgrund Walzbahnen erzeugt. Das Werkzeug dient hierbei aus- schließlich dem Festwalzen einer Nut mit im Querschnitt kreisförmigen Nutgrund, da bei dem beschriebenen Werkzeug ein Abrollen der in der Fuhrungsbahn angeordneten Kugeln gewährleistet sein muß.Tool balls that are guided close to each other in m guideways, effectively forming a ball chain. Rolling along under pressure creates rolling tracks through the balls in the groove base. The tool is used exclusively for deep-rolling a groove with a groove base that is circular in cross-section, since in the described tool it must be ensured that the balls arranged in the guide track roll off.
In der DE 36 01 541 AI sowie der DE 23 11 476 AI ist jeweils ein Werkzeug zur Bearbeitung zylindrischer Werkstuckbohrungen beschrieben. Der DE 25 21 192 ist ein Werkzeug zur Fertigbearbeitung durch Platzverformung von inneren Rotationsflächen in Werkstucken angegeben. Das Werkzeug ist längs einer geome- tπschen Achse einer zur bearbeiteten Oberflache linear verschiebbar angeordnet und enthalt ein Gehäuse, das einen Rotationskörper darstellt, auf dessen Mantelflache mindestens eine Ringnut zur Unterbringung von verformenden Elementen, von denen jedes einen Rotationskörper darstellt, ausgeoildet ist. Zur Bearbeitung von Kegelflachen weist das Werkzeug des Gehäuses Mantelflachen auf, die kegelig mit einem Kegelwinkel ausgebildet sind, welcher dem Kegelwinkel der zu bearbeitenden ???? Oberflache eines Werkstuckes etwa gleich ist. Auf der Mantelflache des Gehäuses sind senkrecht zu dessen Achse drei Ringnuten zur Unterbringung der verformenden Elemente eingearbeitet .DE 36 01 541 AI and DE 23 11 476 AI each describe a tool for machining cylindrical workpiece bores. DE 25 21 192 specifies a tool for finishing by deforming the inner rotating surfaces in workpieces. The tool is arranged along a geometrical axis of a linearly displaceable to the machined surface and contains a housing, which represents a rotating body, at least on its lateral surface an annular groove for accommodating deforming elements, each of which represents a rotating body, is formed. For machining cone surfaces, the tool of the housing has jacket surfaces which are conical with a cone angle which corresponds to the cone angle of the ???? Surface of a workpiece is approximately the same. On the surface of the casing, three ring grooves are machined perpendicular to its axis to accommodate the deforming elements.
Der Erfindung liegt folglich das Problem zugrunde, die Walzvorrichtung der eingangs erwähnten Art so zu verbessern, daß sich damit Druckeigenspannungen entlang einer Wandung einer in einer Materialausnehmung eines Bauteils verlaufenden Kerbe, einschließlich des Kantenbereichs am Anfang und am Ende der Kerbe schnell und einfach erzeugen lassen.The invention is therefore based on the problem of improving the rolling device of the type mentioned at the outset in such a way that compressive residual stresses along a wall of a notch running in a material recess of a component, including the edge region at the beginning and at the end of the notch, can be generated quickly and easily.
Ausgehend von dieser Problemstellung wird bei einer Walzvorrichtung der eingangs erwähnten Art vorgeschlagen, erfin- dungsgemaß an einem wenigstens entlang der Kerbe beweglichen Trager wenigstens einen Halter für ein balliges Walzelement anzuordnen, wobei der Halter als zweiarmiger Hebel am Trager um eine parallel zur Kerbe verlaufenden Achse kippbar angeordnet ist, und ein Kraftubertragungssystem zwischen dem Tra- ger und dem Walzelement zum Einstellen einer quer zum Verlauf der Kerbe gerichteten Walzkraft vorzusehen.Based on this problem, it is proposed in a rolling device of the type mentioned at the outset, according to the invention, to arrange at least one holder for a spherical rolling element on a support which is movable at least along the notch, the holder being tiltable as a two-armed lever on the support about an axis running parallel to the notch is arranged, and to provide a force transmission system between the carrier and the rolling element for setting a rolling force directed transversely to the course of the notch.
Bevorzugt ist, zwei in Richtung der Kerbe sowie in der Hohe versetzte Halter für je ein balliges Walzelement anzuordnen. Dadurch gelingt es, bei zwei uberemandergeordneten Kerben in einem Arbeitsgang die gewünschte Preßkraft jeweils gleichzeitig in jeder Kerbe aufbringen zu können.It is preferred to arrange two holders, each offset in the direction of the notch and in the height, for one spherical rolling element. This makes it possible to apply the desired pressing force simultaneously in each notch to two superimposed notches in one operation.
Durch die gegeneinander versetzte Anordnung der Halter für die Walzelemente laßt sich die Walzvorrichtung mit großer Ei- gensteifigkeit ausbilden, so daß sich hohe, mittels des Kraftubertragungssystems einstellbare, quer zum Verlauf der Kerbe gerichtete Walzkräfte erzeugen lassen. Diese führen zu Druckeigenspannungen entlang einer Belastungsachse des Bauteils in einer etwa senkrecht zu der Belastungsachse verlaufenden Kerbe, die eine in einem zur Belastungsachse paralle- len Querschnitt liegende Krümmung aufweisen kann. Die Kerbe wird dabei über mehrere, entlang der Belastungsachse ausgerichtete Bahnen festgewalzt, wobei jede Bahn die Kerbe nur zu einem Teil erfaßt. Die Walzvorrichtung eignet sich insbesondere zum Festwalzen von Halterungen in Profilnuten und ande- ren Haltenuten für Turbinenschaufeln und ähnlichen Bauteilen.Due to the staggered arrangement of the holders for the rolling elements, the rolling device can be designed with great inherent rigidity, so that high, adjustable by means of the force transmission system, transverse to the course of the Let the notch produce directed rolling forces. These lead to residual compressive stresses along a loading axis of the component in a notch running approximately perpendicular to the loading axis, which can have a curvature lying in a cross section parallel to the loading axis. The notch is then rolled down over a plurality of tracks aligned along the loading axis, each track only grasping part of the notch. The rolling device is particularly suitable for deep-rolling holders in profile grooves and other holding grooves for turbine blades and similar components.
Bevorzugterweise können mehrere Halter als zweiarmige Hebel am Träger auf einer parallel zur Kerbe verlaufenden Achse kippbar angeordnet sein, wobei das Kraftübertragungssystem im Träger jeweils an einem Ende eines Hebels angreift und ein balliges Walzelement jeweils am anderen Ende des Hebels angeordnet ist. Durch Wahl der Hebelübersetzung läßt sich mit einem verhältnismäßig kleinen Federsystem oder einem Hydrauliksystem eine hohe Walzkraft einstellen, die für jedes Walzele- ment unterschiedlich sein kann. Bei Verwendung eines Hydrauliksystems kann eine andere Kraftübertragung als über Hebel je nach Anforderung gewählt werden. Entsprechend einer Weiterbildung kann die Hebelübersetzung auch geändert werden, beispielsweise über eine Verlagerung der Achse zur Drehung des Halters.A plurality of holders can preferably be arranged as two-armed levers on the carrier such that they can be tilted on an axis running parallel to the notch, the force transmission system in the carrier engaging in each case at one end of a lever and a spherical rolling element being arranged at the other end of the lever. By selecting the lever ratio, a relatively small spring system or a hydraulic system can be used to set a high rolling force, which can be different for each rolling element. When using a hydraulic system, a power transmission other than lever can be selected depending on the requirement. According to a further development, the lever ratio can also be changed, for example by moving the axis to rotate the holder.
Um die Walzvorrichtung durch gekrümmte Tannenprofilnuten in einer Radscheibe eines Turbinenläufers führen zu können, kann der Träger um eine zum Verlauf der Kerbe senkrechten Achse drehbar sein, an einer Maschinenspindel befestigt sein und am Träger an die Wände der Profilnuten anlegbare Stütz- und Führungsrollen aufweisen. Dabei kann der Träger entweder mit Bezug auf die Maschinenspindel drehbar sein, oder er kann in einer Werkzeughalterung der Maschinenspindel undrehbar befe- stigt sein, während die Maschinenspindel beim Walzvorgang frei drehbar ist. Die Stutz- und Fuhrungsrollen dienen im wesentlichen zum Fuhren der Walzvorrichtung beim Einfuhren m eine Materialausnehmung, wahrend die Masch enspindel die Walzkraft aufnimmt. Um αie Stutz- und Fuhrungsrollen im wesentlichen spielfrei durch die Materialausnehmung zu fuhren, können sie mittels einer exzentrischen Lagerung einstellbar am Trager angeordnet sein.In order to be able to guide the rolling device through curved pine profile grooves in a wheel disk of a turbine rotor, the carrier can be rotatable about an axis perpendicular to the course of the notch, be fastened to a machine spindle and have support and guide rollers which can be placed on the carrier on the walls of the profile grooves. The carrier can either be rotatable with respect to the machine spindle, or it can be non-rotatably fastened in a tool holder of the machine spindle while the machine spindle is freely rotatable during the rolling process. The support and guide rollers essentially serve to guide the rolling device when it is inserted into a material recess, while the stitch spindle absorbs the rolling force. In order to guide the support and guide rollers through the material recess essentially without play, they can be arranged on the carrier in an adjustable manner by means of an eccentric bearing.
Die Verwendung eines zweiarmigen Hebels gestattet es, die Preßkraft m der Kerbe so aufzubringen, daß gerichtete Druck- eigenspannungen entlang der Wandung und insbesondere entlang des Kantenbereiches am Anfang und am Ende erzeugt werden. Beim Verfahren steht das Walzelement beispielsweise bei einer umlaufenden nach oben gerichteten Hochfahrbewegung der Walz- Vorrichtung unterhalb der nächsten zu verfestigenden Ebene. Wahrend des Hochfahrens gestattet der Hebel die Ausübung der Preßkraft gerichtet auf die Ebene entsprechend der dabei zu überfahrenden Kontur. Dieses erlaubt das Aufbringen einer Kraft nicht nur senkrecht zur Achse des Hebels sondern auch im Winkel dazu.The use of a two-armed lever allows the pressing force m of the notch to be applied in such a way that directed compressive residual stresses are generated along the wall and in particular along the edge area at the beginning and at the end. In the case of the method, the rolling element is below the next plane to be consolidated, for example in the case of a revolving upward movement of the rolling device. During the start-up, the lever allows the pressing force to be exerted on the plane in accordance with the contour to be driven over. This allows the application of a force not only perpendicular to the axis of the lever but also at an angle to it.
Die erfmdungsgemaße Walzvorrichtung ist besonders geeignet zum Erzeugen von Druckeigenspannungen m einer Tannenprofll- nut einer Radscheibe eines Turb enlaufers zur Verankerung einer Turbmenschaufel, wenn drei Hebel am Trager m Richtung der Nut sowie in Hohe der Kerben in der Nut versetzt angeordnet sind, die Vorspannung des Federsystems eines jeden Hebels mittels einer Einstellschraube einstellbar ist und die Stutz- und Fuhrungsrollen am einlaufseitigen Bereich des Tragers zur im wesentlichen spielfreien Anlage an gegenüberliegende Wände der Nut einstellbar angeordnet sind. Anstelle oder in Ergänzung zu einem Federsystem kann auch em Hydrauliksystem eingesetzt werden.The rolling device according to the invention is particularly suitable for generating residual compressive stresses in a pine profile groove of a wheel disk of a turbine rotor for anchoring a turbine blade if three levers on the carrier are arranged offset in the direction of the groove and at the height of the notches in the groove, the preload of the spring system of each lever is adjustable by means of an adjusting screw and the support and guide rollers are arranged on the inlet-side area of the carrier so as to be essentially free of play against opposite walls of the groove. Instead of or in addition to a spring system, a hydraulic system can also be used.
Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausfuhrungsbeispiels des näheren erläutert. In der Zeichnung zeigen: Fig. 1 eine seitliche Teilansicht einer Radscheibe eines Turbinenläufers mit Tannenprofilnuten zur Aufnahme von Turbinenschaufeln,The invention is explained below with reference to an exemplary embodiment shown in the drawing. The drawing shows: 1 is a partial side view of a wheel disc of a turbine runner with fir profile grooves for receiving turbine blades,
Fig. 2 eine teilweise Draufsicht auf eine Radscheibe mit gebogenen Tannenprofilnuten,2 is a partial plan view of a wheel disc with curved fir profile grooves,
Fig. 3 eine Seitenansicht einer erfindungsgemäßen Walzvor- richtung,3 shows a side view of a rolling device according to the invention,
Fig. 4 eine Vorderansicht der Walzvorrichtung gemäß Fig. 3,4 shows a front view of the rolling device according to FIG. 3,
Fig. 5 eine Draufsicht auf die Walzvorrichtung gemäß Fig.5 is a plan view of the rolling device according to FIG.
4 und4 and
Fig. 6 eine Weiterbildung der Walzvorrichtung gemäß Fig. 5.6 shows a development of the rolling device according to FIG. 5.
In Figur 1 weist eine nur teilweise dargestellte Radscheibe 4 eines Turbinenläufers, die das Bauteil ist, das mit einer erfindungsgemäßen Walzvorrichtung 1 mit Druckeigenspannungen versehen werden soll, auf ihrem Umfang Materialausnehmungen 3 in Form von Tannenprofilnuten auf, die in Achsrichtung gebogen verlaufen. Diese Tannenprofilnuten 3 weisen im wesentlichen parallele Wände 2 auf, die mit gegenüberliegenden KerbenIn FIG. 1, a wheel disk 4 of a turbine rotor, which is only partially shown, and which is the component that is to be provided with residual compressive stresses with a rolling device 1 according to the invention, has material recesses 3 in its circumference in the form of pine profile grooves, which run in the axial direction. These fir profile grooves 3 have essentially parallel walls 2, with opposite notches
5 versehen sind.5 are provided.
Figur 2 zeigt eine Draufsicht auf die Radscheibe 4 aus Figur 2. Das Festwalzen von metallischen Bauteilen, die Kerben zur Halterung von Bauelementen aufweisen, wie z. B. Haltenuten zur Verankerung von Turbinenschaufeln in einem Turbinenläufer, die betrieblichen Fliehkraftbelastungen unterliegen, die entlang einer zu den Kerben senkrechten Belastungsachse wirken, erfolgt mit dem Ziel, die Dauerhaltbarkeit, insbesondere die Haltbarkeit unter Schwingungsriß-Korrosionsangriffen zu erhohen. Beim Festwalzen ist die Oberflachendeformation zum Teil elastisch und zum Teil plastisch. Sie fuhrt einerseits zur Steigerung der Harte des bearbeiteten Werkstoffes an seiner Oberflache sowie oberflachennahen Schichten und ande- rerseits zur Ausbildung von Druckeigenspannungen an und unter der Oberflache. Diese Druckeigenspannungen sind unter Umstanden geeignet, Rißwachstum von der Oberflache in den Werkstoff hinein zu unterbinden. Druckeigenspannungen kommen daher in Frage, um Schwingungsriß-Korrosionsangriffen entgegen zu tre- ten. Die Vermeidung von Gefahrdung von Schwmgungsriß-Korro- sion ist ein wichtiger Aspekt bei der Herstellung von rotati- onsbelasteten Komponenten von Gas- oder Dampfturbinen, wie Turbmenschaufein. In der bereits erwähnten deutschen Offen- legungsschrift 195 16 834.8 derselben Anmelderm sind ver- schiedene Walzvorrichtungen und die durch das mittels derFigure 2 shows a plan view of the wheel disc 4 of Figure 2. The deep rolling of metallic components that have notches for holding components, such as. B. Holding grooves for anchoring turbine blades in a turbine rotor, which are subject to operational centrifugal loads that act along a load axis perpendicular to the notches, is carried out with the aim of durability, in particular the durability under vibration crack corrosion attacks increase. When deep rolling, the surface deformation is partly elastic and partly plastic. On the one hand, it leads to an increase in the hardness of the processed material on its surface and layers close to the surface, and on the other hand to the development of residual compressive stresses on and under the surface. These residual compressive stresses may be suitable for preventing crack growth from the surface into the material. Residual pressure stresses can therefore be used to counteract vibration crack corrosion attacks. Avoiding the risk of vibration crack corrosion is an important aspect in the manufacture of rotationally stressed components of gas or steam turbines, such as turbine showers. In the aforementioned German laid-open publication 195 16 834.8 of the same applicant, there are various rolling devices and those by means of the
Walzvorrichtung erzielten Effekte im einzelnen dokumentiert und beschrieben.The effects achieved by the rolling device are documented and described in detail.
In Figur 3 ist die erfmdungsgemaße Walzvorrichtung 1 an ei- ner im einzelnen nicht dargestellten Werkzeughalterung einer Maschmenspmdel 6 undrehbar befestigt und weist einen Trager 7 für drei Halter 8 in Form von zweiarmigen Hebeln für ballige Walzelemente 9 auf. Jeder dieser Halter 8 ist um eine Kippachse 11 kippbar, die im wesentlichen m Richtung der Ma- terialausnehmung 3, d. h. der Tannenprofilnut verlaufen. Jedes im Trager 7 liegende Ende der Halter 8 ist von einem Kraftubertragungssystem 10 m Form eines Federsystems beaufschlagt, dessen die Walzkraft bestimmende Kraft mittels Einstellschrauben 15 für jeden Halter 8 getrennt einstellbar ist. Das Kraftubertragungssystem 10 kann alternativ auch als ein Hydrauliksystem ausgeführt sein, wodurch eine besonders genaue Kraftübertragung gewährleistet ist.In FIG. 3, the rolling device 1 according to the invention is non-rotatably attached to a tool holder (not shown in detail) of a machine spindle 6 and has a carrier 7 for three holders 8 in the form of two-armed levers for crowned rolling elements 9. Each of these holders 8 can be tilted about a tilt axis 11 which essentially m in the direction of the material recess 3, ie. H. of the fir profile groove. Each end of the holder 8 lying in the carrier 7 is acted upon by a force transmission system 10 m in the form of a spring system, the force determining the rolling force of which can be set separately for each holder 8 by means of adjusting screws 15. The power transmission system 10 can alternatively also be designed as a hydraulic system, which ensures a particularly precise power transmission.
Figur 4 zeigt eine Vorderansicht der Walzvorrichtung 1 gemäß Figur 3. An einem Ende des Tragers 7, das jeweils das ein- laufseitige Ende beim Einlauf in eine Tannenprofilnut 3 ist, ist e ne Konsole 16 aufgebracht, m üer zwei Trager 14 für ein Paar Stütz- und Führungsrollen 13 drehbar und feststellbar gelagert sind. Die Konsole 16 kann ein Lagerbock sein. Die Stütz- und Führungsrollen 13 sind an den Trägern 14 exzentrisch gelagert, so daß sich der Abstand der Stütz- und Führungsrollen 13 durch Drehen der Träger 14 verändern und an den Abstand der Wände 2 einer Tannenprofilnut 3 anpassen läßt, so daß die Stütz- und Führungsrollen 13 im wesentlichen spielfrei an diesen Wänden 2 anliegen. Die Träger 14 weisen dazu beispielsweise eine exzentrische Stirnbohrung für die Stütz- und Führungsrollenachse auf.FIG. 4 shows a front view of the rolling device 1 according to FIG. 3. At one end of the carrier 7, which is the end on the inlet side when entering a fir-groove 3, a bracket 16 is attached, with two supports 14 for a pair of support and guide rollers 13 are rotatably and lockably mounted. The console 16 can be a pedestal. The support and guide rollers 13 are mounted eccentrically on the carriers 14, so that the distance between the support and guide rollers 13 can be changed by rotating the carrier 14 and can be adapted to the distance between the walls 2 of a fir profile groove 3, so that the support and Guide rollers 13 rest against these walls 2 essentially without play. For this purpose, the carriers 14 have, for example, an eccentric end bore for the support and guide roller axis.
Figur 5 zeigt, wie die erfindungsgemäße Walzvorrichtung 1 am Werkstück, d. h. beispielsweise einer Radscheibe 4 eines Turbinenläufers mit Bezug auf eine Tannenprofilnut 3 positio- niert und ausgerichtet ist. Der zum Erzeugen von Druckeigenspannungen benötigte Anpreßdruck der Walzelemente 9 an die Kerben 5 wird über die Vorspannungen jedes einzelnen Federsystems 10 mittels der Einstellschrauben 15 für jedes Walzelement 9 gesondert eingestellt.Figure 5 shows how the rolling device 1 according to the invention on the workpiece, i. H. For example, a wheel disk 4 of a turbine rotor is positioned and aligned with respect to a fir-groove 3. The contact pressure of the roller elements 9 against the notches 5 required to generate residual compressive stresses is set separately for each roller element 9 via the preloads of each individual spring system 10 by means of the adjusting screws 15.
Bereits beim Einlaufen in die Tannenprofilnut 3 wird auf diese Weise eine Druckeigenspannung an den Kanten der Tannenprofilnut 3 erzeugt.Already when entering the fir profile groove 3, a residual compressive stress is generated on the edges of the fir profile groove 3.
Während des Walzvorgangs ist die Maschinenspindel 6 freigeschaltet und kann sich, durch die Stütz- und Führungsrollen 13 geführt, frei um ihre Achse 12 drehen und damit dem Verlauf der Tannenprofilnut 3 folgen. Die Achse 12 kann über einen Einspannzapfen, der die Drehachse vorgibt, definiert sein. Beim Einlauf in die Tannenprofilnut 3 wird das durch den außen liegenden Halter 8 bzw. Walzelement 9 erzeugte Drehmoment um die Achse 12 durch die Stütz- und Führungsrollen 13 ausgeglichen. Diese erzeugen ein entgegengesetztes Drehmoment, das zur Führung entlang des Verlaufes des Tannen- baumprofiles 3 dient. Die Walzvorrichtung 1 wird zeilenweise durch eine Tannenpro- filnut 3 oder eine Ausnehmung eines anderen Bauteils gefuhrt, bis die einzelnen Walzelemente 9 über die Kanten der Tannen- profilnut 3 aus der Radscheibe austreten und dabei auch diese Kanten festwalzen.During the rolling process, the machine spindle 6 is unlocked and, guided by the support and guide rollers 13, can rotate freely about its axis 12 and thus follow the course of the fir profile groove 3. The axis 12 can be defined by a clamping pin which specifies the axis of rotation. When entering the fir profile groove 3, the torque generated by the outer holder 8 or rolling element 9 about the axis 12 is compensated for by the support and guide rollers 13. These generate an opposite torque, which is used for guidance along the course of the fir tree profile 3. The rolling device 1 is guided line by line through a fir profile groove 3 or a recess in another component until the individual rolling elements 9 emerge from the wheel disk via the edges of the fir profile groove 3 and also roll these edges down.
Die zeilenweise Zustellung erfolgt über den Vorschub der Ma- schmenspindel 6, an der die Walzvorrichtung 1 gehalten ist. Die Steuerung der Bewegung der Walzvorrichtung 1 mit Bezug auf das Bauteil 4, m diesem Fall die Radscheibe eines Turbi- nenlaufers, kann mittels einer NC-Steuerung erfolgen.The line-by-line feed takes place via the feed of the mesh spindle 6, on which the rolling device 1 is held. The movement of the rolling device 1 with respect to the component 4, in this case the wheel disc of a turbine rotor, can be controlled by means of an NC control.
Figur 6 zeigt eine Weiterbildung der Walzvorrichtung gemäß Figur 5. An beiden Enden des Tragers 7 ist eine Konsole 16 aufgebracht, in der zwei Trager 14 für em Paar Stutz- undFigure 6 shows a development of the rolling device according to Figure 5. At both ends of the support 7, a bracket 16 is applied, in which two supports 14 for a pair of support and
Fuhrungsrollen 13 drehbar und feststellbar gelagert sind. Die Konsole 16 ist als Lagerbock ausgebildet, in dem die Stutz- und Fuhrungsrollen 13 exentrisch gelagert sind. Dadurch, daß an jedem Ende des Tragers 7 die Möglichkeit zur Aufnahme bzw. Einleitung eines Drehmomentes um die Achse 12 des Tragers 7 gegeben ist, kann die Walzvorrichtung nicht nur die Verfahrrichtung ohne Probleme andern. Vielmehr ermöglicht dieses insbesondere bei runden Kerben eine mehrfache Fuhrung, was die Genauigkeit nochmals erhöht.Guide rollers 13 are rotatably and lockably mounted. The console 16 is designed as a bearing block, in which the support and guide rollers 13 are mounted eccentrically. Characterized in that at each end of the carrier 7 there is the possibility of receiving or introducing a torque about the axis 12 of the carrier 7, the rolling device can not only change the direction of travel without problems. Rather, this enables multiple guiding, particularly in the case of round notches, which further increases the accuracy.
Die erfmdungsgemaße Walzvorrichtung laßt sich für em rasches Festwalzen einer großen Anzahl von Materialausnehmungen in gleicher Geometrie mit mehreren Walzelemente ausfuhren. Die Walzelemente können auswechselbar sein, so daß mit einer einzigen Walzvorrichtung sowohl em Festwalzen als auch em Glattwalzen der entsprechenden Kerben möglich ist. The rolling device according to the invention can be designed for rapid deep rolling of a large number of material recesses in the same geometry with several rolling elements. The rolling elements can be exchangeable, so that both deep rolling and smooth rolling of the corresponding notches are possible with a single rolling device.

Claims

Patentansprüche claims
1. Walzvorrichtung (1) zum Erzeugen von Druckeigenspannungen in einer entlang einer Wandung (2) einer Materialausnehmung (3) eines Bauteils (4) verlaufenden Kerbe (5) mit einem wenigstens entlang der Kerbe (5) beweglichen Trager (7), wenigstens einem Halter (8) für ein balliges Walzelement (9), wobei der Halter (8) als zweiarmiger Hebel am Trager (7) um eine parallel zur Kerbe (5) verlaufende Kippachse (11) kipp- bar angeordnet ist, und einem Kraftubertragungssystem (10) zwischen dem Trager (7) und dem Walzelement (9) zum Einstellen einer quer zum Verlauf der Kerbe (5) gerichteten Walzkraft .1. Rolling device (1) for generating residual compressive stresses in a notch (5) which runs along a wall (2) of a material recess (3) of a component (4) and has a carrier (7), at least one, which is movable at least along the notch (5) Holder (8) for a spherical roller element (9), the holder (8) being arranged as a two-armed lever on the support (7) so as to be tiltable about a tilt axis (11) running parallel to the notch (5), and a force transmission system (10 ) between the carrier (7) and the rolling element (9) for setting a rolling force directed transversely to the course of the notch (5).
2. Walzvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß zwei am Trager (7) angeordnete, in Richtung der Kerbe (5) sowie in der Hohe versetzte Halter (8) für je ein balliges Walzelement (9) vorhanden sind.2. Rolling device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that two on the carrier (7) arranged in the direction of the notch (5) and in the height offset holder (8) for a spherical rolling element (9) are available.
3. Walzvorrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, daß das Kraftubertragungssystem (10) im Trager (7) an einem Ende des Halters (8) angreift und ein balliges Walzelement (9) am an- deren Ende des Halters (8) angeordnet ist.3. Rolling device according to claim 1 or 2, characterized in that the force transmission system (10) engages in the carrier (7) at one end of the holder (8) and a spherical rolling element (9) is arranged at the other end of the holder (8) .
4. Walzvorrichtung nach Anspruch 1, 2 oder 3, d a d u r c h g e k e n n z e i c h n e t, daß das Kraftubertragungssystem (10) ein für das Walzelement (9) em- stellbares Federsystem aufweist, insbesondere für jeweils ein Walzelement ein Federsystem.4. Rolling device according to claim 1, 2 or 3, so that the force transmission system (10) has a spring system which can be set for the rolling element (9), in particular a spring system for each rolling element.
5. Walzvorrichtung nach Anspruch 1, 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , daß das Kraftubertragungssystem (10) ein für das Walzelement (9) einstellbares Hydrauliksystem aufweist, welches insbesondere für jeweils em Walzelement (9) gesondert einstellbar ist. 5. Rolling device according to claim 1, 2 or 3, characterized in that the force transmission system (10) has an adjustable for the rolling element (9) hydraulic system, which is particularly adjustable for each em rolling element (9) separately.
6. Walzvorrichtung nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t, daß eine Hebelübersetzung des zweiarmigen Hebels änderbar ist, insbesondere über eine Lageänderung der Kippachse (11) .6. Rolling device according to one of claims 1 to 5, d a d u r c h g e k e n n z e i c h n e t that a lever ratio of the two-armed lever can be changed, in particular via a change in position of the tilt axis (11).
7. Walzvorrichtung nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, daß der Träger (7) um eine zum Verlauf der Kerbe (5) senkrechte Achse (12) drehbar ist, an einer Maschinenspindel (6) befestigt ist und am Träger (7) an die Wände (2) der Kerbe (5) anlegbare Stütz- und Führungsrollen (13) angeordnet sind.7. Rolling device according to one of claims 1 to 6, characterized in that the carrier (7) is rotatable about an axis (12) perpendicular to the course of the notch (5), is fastened to a machine spindle (6) and on the carrier (7) support and guide rollers (13) which can be placed on the walls (2) of the notch (5) are arranged.
8. Walzvorrichtung nach Anspruch 7, d a d u r c h g e k e n n z e i c h n e t, daß der Träger (7) an der Maschinenspindel (6) in einer Werkzeughalterung undrehbar befestigt und die Maschinenspindel (6) während des Walzvorganges frei drehbar ist.8. Rolling device according to claim 7, so that the carrier (7) is non-rotatably fastened to the machine spindle (6) in a tool holder and the machine spindle (6) is freely rotatable during the rolling process.
9. Walzvorrichtung nach Anspruch 7 oder 8, d a d u r c h g e k e n n z e i c h n e t, daß die Stütz- und Führungsrollen (13) mittels einer exzentrischen Lagerung (14) einstellbar am Träger (7) angeordnet sind.9. Rolling device according to claim 7 or 8, so that the support and guide rollers (13) are arranged on the carrier (7) in an adjustable manner by means of an eccentric bearing (14).
10. Walzvorrichtung zum Erzeugen von Druckeigenspannungen in einer Tannenprofilnut (3) einer Radscheibe (4) eines Turbinenläufers zur Verankerung einer Turbinenschaufel nach einem der vorhergehenden Ansprüchen, d a d u r c h g e k e n n z e i c h n e t, daß drei Hal- ter (8) am Träger (7) in Richtung der Nut (3) sowie in der Höhe der Kerben (5) in der Nut (3) versetzt angeordnet sind, die Vorspannung des Federsystems (10) eines jeden Halters (8) mittels einer Einstellschraube (15) einstellbar ist und die Stütz- und Führungsrollen (13) am einlaufseitigen Bereich des Trägers (7) zur im wesentlichen spielfreien Anlage an gegenüberliegende Wände (2) der Nut (3) einstellbar angeordnet sind. 10. Rolling device for generating residual compressive stresses in a fir profile groove (3) of a wheel disk (4) of a turbine rotor for anchoring a turbine blade according to one of the preceding claims, characterized in that three holders (8) on the carrier (7) in the direction of the groove ( 3) and in the height of the notches (5) in the groove (3), the preload of the spring system (10) of each holder (8) can be adjusted by means of an adjusting screw (15) and the support and guide rollers (13 ) on the inlet side area of the support (7) for essentially play-free contact with opposite walls (2) of the groove (3) are adjustable.
PCT/DE1998/002821 1997-09-24 1998-09-22 Rolling device for generating pressured internal stress in a component WO1999015303A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997142137 DE19742137A1 (en) 1997-09-24 1997-09-24 Rolling device for turbine rotor component
DE19742137.7 1997-09-24

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Publication number Priority date Publication date Assignee Title
EP1555329A1 (en) 2004-01-15 2005-07-20 Siemens Aktiengesellschaft Workpiece with internal compressive stresses, method and apparatus for producing internal compressive stresses
RU209547U1 (en) * 2021-10-25 2022-03-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" TOOL FOR ELECTROMECHANICAL BURNING

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049526A (en) * 1979-05-16 1980-12-31 Inst Mech Precyz <A device for forming transition surfaces at the edges of holes in cylinders
SU969502A1 (en) * 1981-04-15 1982-10-30 Предприятие П/Я Р-6930 Device for machining curvilinear profile
SU1046075A1 (en) * 1982-06-29 1983-10-07 Московский авиационный технологический институт им.К.Э.Циолковского Arrangement for burnishing
SU1118518A1 (en) * 1982-06-18 1984-10-15 Производственное Объединение "Ворошиловградский Тепловозостроительный Завод Им.Октябрьской Революции" Fuller for machining internal cylindrical surfaces
SU1418027A1 (en) * 1987-01-21 1988-08-23 Предприятие П/Я Р-6930 Arrangement for burnishing curvilinear surfaces
DE4015205C1 (en) * 1990-05-11 1991-08-22 Mtu Muenchen Gmbh Method of reinforcing gas turbine rotor - has balls forced against base surface of slot in rotor to compress it
DE19516834A1 (en) * 1995-05-08 1996-11-14 Siemens Ag Internal stress rolling device for interior surface of work piece

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2311476C3 (en) * 1973-03-08 1978-07-20 Wilhelm Hegenscheidt, Gmbh, 5140 Erkelenz Internal roller burnishing tool
DE2521192C3 (en) * 1975-05-13 1980-11-20 Mogilevskij Avtomobilnjy Zavod Imeni S.M. Kirova, Mogilew (Sowjetunion) Tool for finishing inner surfaces of revolution
DE3601541A1 (en) * 1986-01-20 1987-07-23 Kraftwerk Union Ag Method and device for improving the surface quality of bores

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049526A (en) * 1979-05-16 1980-12-31 Inst Mech Precyz <A device for forming transition surfaces at the edges of holes in cylinders
SU969502A1 (en) * 1981-04-15 1982-10-30 Предприятие П/Я Р-6930 Device for machining curvilinear profile
SU1118518A1 (en) * 1982-06-18 1984-10-15 Производственное Объединение "Ворошиловградский Тепловозостроительный Завод Им.Октябрьской Революции" Fuller for machining internal cylindrical surfaces
SU1046075A1 (en) * 1982-06-29 1983-10-07 Московский авиационный технологический институт им.К.Э.Циолковского Arrangement for burnishing
SU1418027A1 (en) * 1987-01-21 1988-08-23 Предприятие П/Я Р-6930 Arrangement for burnishing curvilinear surfaces
DE4015205C1 (en) * 1990-05-11 1991-08-22 Mtu Muenchen Gmbh Method of reinforcing gas turbine rotor - has balls forced against base surface of slot in rotor to compress it
DE19516834A1 (en) * 1995-05-08 1996-11-14 Siemens Ag Internal stress rolling device for interior surface of work piece

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 8336, Derwent World Patents Index; Class P61, AN 83-757009, XP002092001 *
DATABASE WPI Section PQ Week 8425, Derwent World Patents Index; Class P61, AN 84-157202, XP002092000 *
DATABASE WPI Section PQ Week 8516, Derwent World Patents Index; Class P61, AN 85-097956, XP002092002 *
DATABASE WPI Section PQ Week 8909, Derwent World Patents Index; Class P61, AN 89-067426, XP002091999 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000480A1 (en) * 2008-03-03 2009-09-10 Alstom Technology Ltd. Device for post-processing of fastening grooves for receiving a blading of a gas and / or steam turbine plant
RU2457932C1 (en) * 2011-03-02 2012-08-10 Государственное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Method of mandrelling with expansion
CN104108105A (en) * 2014-06-20 2014-10-22 天津大学 Clamp for connecting robot arm with surface ultrasonic rolling equipment
RU179130U1 (en) * 2017-04-24 2018-04-27 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновская государственная сельскохозяйственная академия имени П.А. Столыпина" TOOL FOR ELECTROMECHANICAL TURNING OF SMOOTH CYLINDRICAL HOLES
RU2749790C1 (en) * 2020-10-12 2021-06-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Electromechanical drilling tool for smooth cylindrical holes
RU207543U1 (en) * 2021-07-12 2021-11-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DORN WITH DUPLEX INSTRUMENT

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