WO1999015303A1 - Dispositif de laminage pour la production de contraintes internes de compression dans une piece - Google Patents

Dispositif de laminage pour la production de contraintes internes de compression dans une piece 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
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
carrier
rolling device
notch
holder
Prior art date
Application number
PCT/DE1998/002821
Other languages
German (de)
English (en)
Inventor
Hans Wagner
Dieter Thiele
Claus Feige
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999015303A1 publication Critical patent/WO1999015303A1/fr

Links

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.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Machine Tool Units (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne un dispositif de laminage pour la production de contraintes internes de compression dans une rainure (5) courant le long d'une paroi (2) d'un évidement (3) de matériau d'une pièce (4). Le dispositif selon l'invention comporte un support (7) mobile au moins le long de la rainure, au moins un élément de fixation (8) disposé sur le support (7) avec décalage en direction de la rainure (5) et en hauteur et destiné à un élément de laminage (9) convexe, ainsi qu'un système de transmission de force (10) situé entre le support (7) et l'élément de laminage et servant au réglage d'une force de laminage dirigée en travers par rapport au tracé de la rainure (5).
PCT/DE1998/002821 1997-09-24 1998-09-22 Dispositif de laminage pour la production de contraintes internes de compression dans une piece WO1999015303A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997142137 DE19742137A1 (de) 1997-09-24 1997-09-24 Walzvorrichtung zum Erzeugen von Druckeigenspannungen in einem Bauteil
DE19742137.7 1997-09-24

Publications (1)

Publication Number Publication Date
WO1999015303A1 true WO1999015303A1 (fr) 1999-04-01

Family

ID=7843470

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002821 WO1999015303A1 (fr) 1997-09-24 1998-09-22 Dispositif de laminage pour la production de contraintes internes de compression dans une piece

Country Status (2)

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DE (1) DE19742137A1 (fr)
WO (1) WO1999015303A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000480A1 (de) * 2008-03-03 2009-09-10 Alstom Technology Ltd. Vorrichtung zur Nachbearbeitung von Befestigungsnuten zur Aufnahme einer Beschaufelung einer Gas- und/oder Dampfturbinenanlage
RU2457932C1 (ru) * 2011-03-02 2012-08-10 Государственное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Способ дорнования с растяжением
CN104108105A (zh) * 2014-06-20 2014-10-22 天津大学 用于连接机器人手臂和表面超声辊压设备的夹具
RU179130U1 (ru) * 2017-04-24 2018-04-27 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновская государственная сельскохозяйственная академия имени П.А. Столыпина" Инструмент для электромеханического дорнования гладких цилиндрических отверстий
RU2749790C1 (ru) * 2020-10-12 2021-06-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Инструмент для электромеханического дорнования гладких цилиндрических отверстий
RU207543U1 (ru) * 2021-07-12 2021-11-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Дорн с дуплексным инструментом

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555329A1 (fr) 2004-01-15 2005-07-20 Siemens Aktiengesellschaft Piece ayant des contraintes de compression internes, procédé et dispositif de production de contraintes de compression internes
RU209547U1 (ru) * 2021-10-25 2022-03-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Инструмент для электромеханического дорнования

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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 (ru) * 1981-04-15 1982-10-30 Предприятие П/Я Р-6930 Устройство дл обработки криволинейного профил
SU1046075A1 (ru) * 1982-06-29 1983-10-07 Московский авиационный технологический институт им.К.Э.Циолковского Устройство дл выглаживани
SU1118518A1 (ru) * 1982-06-18 1984-10-15 Производственное Объединение "Ворошиловградский Тепловозостроительный Завод Им.Октябрьской Революции" Раскатка дл обработки внутренних цилиндрических поверхностей
SU1418027A1 (ru) * 1987-01-21 1988-08-23 Предприятие П/Я Р-6930 Устройство дл выглаживани криволинейных поверхностей
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 (de) * 1995-05-08 1996-11-14 Siemens Ag Walzvorrichtung zur Erzeugung von Druckeigenspannungen in einem Bauteil sowie Verwendung der Walzvorrichtung

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DE2311476C3 (de) * 1973-03-08 1978-07-20 Wilhelm Hegenscheidt, Gmbh, 5140 Erkelenz Innenglattwalzwerkzeug
DE2521192C3 (de) * 1975-05-13 1980-11-20 Mogilevskij Avtomobilnjy Zavod Imeni S.M. Kirova, Mogilew (Sowjetunion) Werkzeug zur Fertigbearbeitung innerer Rotationsflächen
DE3601541A1 (de) * 1986-01-20 1987-07-23 Kraftwerk Union Ag Verfahren und vorrichtung zur verbesserung der oberflaechenguete von bohrungen

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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 (ru) * 1981-04-15 1982-10-30 Предприятие П/Я Р-6930 Устройство дл обработки криволинейного профил
SU1118518A1 (ru) * 1982-06-18 1984-10-15 Производственное Объединение "Ворошиловградский Тепловозостроительный Завод Им.Октябрьской Революции" Раскатка дл обработки внутренних цилиндрических поверхностей
SU1046075A1 (ru) * 1982-06-29 1983-10-07 Московский авиационный технологический институт им.К.Э.Циолковского Устройство дл выглаживани
SU1418027A1 (ru) * 1987-01-21 1988-08-23 Предприятие П/Я Р-6930 Устройство дл выглаживани криволинейных поверхностей
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 (de) * 1995-05-08 1996-11-14 Siemens Ag Walzvorrichtung zur Erzeugung von Druckeigenspannungen in einem Bauteil sowie Verwendung der Walzvorrichtung

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000480A1 (de) * 2008-03-03 2009-09-10 Alstom Technology Ltd. Vorrichtung zur Nachbearbeitung von Befestigungsnuten zur Aufnahme einer Beschaufelung einer Gas- und/oder Dampfturbinenanlage
RU2457932C1 (ru) * 2011-03-02 2012-08-10 Государственное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" Способ дорнования с растяжением
CN104108105A (zh) * 2014-06-20 2014-10-22 天津大学 用于连接机器人手臂和表面超声辊压设备的夹具
RU179130U1 (ru) * 2017-04-24 2018-04-27 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновская государственная сельскохозяйственная академия имени П.А. Столыпина" Инструмент для электромеханического дорнования гладких цилиндрических отверстий
RU2749790C1 (ru) * 2020-10-12 2021-06-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Инструмент для электромеханического дорнования гладких цилиндрических отверстий
RU207543U1 (ru) * 2021-07-12 2021-11-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" Дорн с дуплексным инструментом

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