WO2018184784A1 - Dispositif d'usinage pour usinage in situ d'alésages préconfectionnés - Google Patents

Dispositif d'usinage pour usinage in situ d'alésages préconfectionnés Download PDF

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Publication number
WO2018184784A1
WO2018184784A1 PCT/EP2018/055542 EP2018055542W WO2018184784A1 WO 2018184784 A1 WO2018184784 A1 WO 2018184784A1 EP 2018055542 W EP2018055542 W EP 2018055542W WO 2018184784 A1 WO2018184784 A1 WO 2018184784A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
tool holder
processing device
drive
axially
Prior art date
Application number
PCT/EP2018/055542
Other languages
German (de)
English (en)
Inventor
Rick Giesel
Marat Visajtaev
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 WO2018184784A1 publication Critical patent/WO2018184784A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/02—Boring bars
    • B23B29/025—Boring toolholders fixed on the boring bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03403—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing
    • B23B29/03407—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by means of screws and nuts

Definitions

  • the present invention relates to a processing device for an in-situ processing of prefabricated bores, in particular bores of two interconnected coupling flanges.
  • the coupling bores of generator and turbine clutches are to be reworked with such a mobile processing device.
  • the transition radius should be increased from the subsidence to its contact surface.
  • the problem here is that the coupling holes of the generator coupling are difficult to access from both sides clutch why conven ⁇ tional machines can not be used.
  • the purpose of processing the respective processing devices at each hole to be machined clutch must be realigned, which leads to long setup and demoszei ⁇ th.
  • the object of the invention is therefore to provide a processing device that can be used even in confined spaces and an in-situ post-processing of coupling holes with mounted clutch and only temporarily disassembled coupling pin allows.
  • a machining ⁇ processing device comprising a clamping unit having a base hollow cylindrical basic shape, which defines a longitudinal axis and in a Kupp ⁇ ment bore axially inserted, and provided on the body clamping sleeve which surrounds the body and is operable to move a clamping range of the clamping sleeve radially outward and / or widen and so fix the body in a coupling bore, a tool holder which passes axially through the base body and is rotatable about the longitudinal axis of the body and axially movable, wherein at a front axial end the tool holder clamping means for attaching a
  • Tool provided or attachable coupling means for connection of the rear axial end of the tool holder are provided with a drive unit.
  • the invention is therefore based on the consideration to clamp the Bear ⁇ processing device in the coupling bore to be machined itself.
  • the processing device comprises a clamping unit with a cylindrical base body, which can be inserted into the respective coupling bore and tightened therein simultaneously via the clamping sleeve and zen ⁇ trated.
  • the machining device further comprises two further assemblies, namely the tool holder, which axially engages through the clamping unit and carries the actuating tool in the region of its front end face, and a drive unit which is coupled or coupleable to the rear end portion of the tool holder, around the tool holder to drive in rotation.
  • the three subassemblies are not completely assembled until the processing device, when the clamping unit in the coupling to be machined. bore hole is mounted.
  • the assembly of the on ⁇ drive unit from the one side, the back of Kupp ⁇ ment hole takes place while the tool holder is inserted from the other, front side into the main body of the clamping unit. In this way the space required for the mounting space is comparatively small, so that the dung OF INVENTION ⁇ proper processing means may also be used for generator couplings which are not easily accessible from both sides clutch.
  • the base body can be integrally formed in principle, but for assembly reasons it may be expedient, the base body axially into a plurality of base elements to undertei ⁇ len, which are here inserted from two coupling sides in the Kupplungsboh- tion and connected to each other, for example plugged together or screwed. Due to the axial division of the main body, the basic body elements can be made short, so that their assembly requires little space.
  • the clamping sleeve is pushed onto the main body axially from its front end, and that on the front end of the body, a clamping nut is screwed, which is operatively connected to the clamping sleeve, that the clamping sleeve by turning the clamping nut is actuated about the longitudinal axis.
  • the actuation of the clamping sleeve takes place in a simple manner by turning the clamping nut.
  • the clamping sleeve may be provided on its inner side with conical surfaces which are formed tapering from the axial ends of the clamping sleeve to the center.
  • the conical surfaces act in this embodiment with corresponding, likewise conical outer surfaces of two
  • Clamping bushes which are pushed onto the basic body and the inside supporting the adapter sleeve, in the manner together ⁇ men in that the clamping sleeve is radially pressed apart, when the clamping bushes are compressed.
  • the corre ⁇ sponding compressive force can be applied via the clamping nut ⁇ who must then be directly or indi ⁇ rectly in contact with the front clamping bush to push the front clamping sleeve to the rear in the direction of the rear clamping sleeve, axially on a contact surface of the Base is supported or otherwise prevented from moving axially to the rear.
  • Other actuating mechanisms for a clamping sleeve are also conceivable.
  • the clamping unit in the manner of a hydraulically actuated Dehnspanndorns be ⁇ forms, as it is used in the field of clamping technology in particular for clamping tools.
  • this expediently has at its front end surface facing away from the clamping sleeve a plurality of evenly distributed along the circumference arranged recesses for the engagement of an actuating tool, said recesses may be open in particular to the outer peripheral surface of the clamping nut.
  • the tool holder can be rotatably mounted in the base body by plain bearings or by roller bearings, in particular by needle bearings, about the longitudinal axis.
  • a clamping means in the form of a clamping holder is provided or fixed.
  • the tool holder may have in its front end face a receptacle for a turning tool, wherein in the recording several threaded holes open, are screwed in which clamping screws for fixing the turning tool in the receptacle or are screwed.
  • the tool holder alswei ⁇ sen a receptacle for boring bar.
  • a drive unit with a drive in particular a pneumatic drive
  • a drive unit shaft of the drive with the tool holder via the clutch ⁇ medium is operatively connected to drive the tool holder rotating.
  • the drive extends in the longitudinal direction of the body and in particular parallel to this, wherein its drive shaft is provided at the rear end of the on ⁇ drive.
  • the drive extends parallel to the clamping unit. The distance is chosen so that the drive is positioned radially outside the coupling flanges in the assembled state, which contributes to a compact design.
  • the drive shaft of the drive with the tool holder via a transmission in particular via a toothed belt transmission, operatively connected.
  • the transmission has a driven pinion, which - in particular in a housing of the drive unit - mounted coaxially to the longitudinal axis and rotatable about this and releasably connected to the tool holder via the coupling means to drive the tool holder rotating.
  • the pinion is designed as a toothed belt pulley, which is operatively connected to a toothed belt pulley provided on the drive shaft via a toothed belt.
  • the transmission can have an intermediate shaft, which engages in the pinion and is non-rotatably held therein, but axially displaceable, and which is releasably connected to the tool holder via its coupling means.
  • the intermediate shaft can be Dodgebil ⁇ det as a splined shaft, in which case the pinion or fixed therein, in particular pressed intermediate bushing is designed as a wedge ⁇ hub shaft, in which the spline shaft axially displaceable, but rotatably engaged.
  • an adjusting mechanism is provided.
  • this has a threaded rod which coaxially extends to the longitudinal axis and on the intermediate shaft axially ⁇ fixed, but is held rotatable about the longitudinal axis.
  • the adjusting mechanism comprises a worm gear which engages the threaded rod and is manually or mechanically actuatable to axially displace the threaded rod, with guide means being provided to prevent the threaded rod from rotating about the longitudinal axis.
  • the guide means are provided to guide the threaded rod in a straight line and to secure against rotation.
  • a guide pin may be screwed to the rear end face of the threaded rod, which engages in a corresponding guide groove an axial guide ⁇ which is held in a housing of the worm wheel ⁇ transmission which is in turn fixed to the gear housing.
  • the axial displacement of the tool holder is expediently limited by stops.
  • the guide groove of the axial guide may have a length corresponding to the desired adjustment path. It is also possible to provide adjustable stops.
  • connection between the intermediate shaft and the tool ⁇ holder can be done for example via a clamping screw, which passes through the tool holder and into a threaded bore which is formed in the front end face of the intermediate shaft, is screwed.
  • the tool holder and the intermediate shaft engagement contours may be provided in the ⁇ to each other facing end sides which can be brought positively into engagement to produce a rotationally fixed Ver ⁇ bond between the components.
  • FIG. 1 shows a processing device according to the present invention
  • FIG. 1 in a perspective view
  • FIG. 5 shows a tool holder of the processing device from FIG. 1 in a perspective representation obliquely from behind
  • FIG. 6 shows the tool holder of the processing device
  • FIG. 1 in a perspective front view
  • FIG. 7 shows a drive unit of the processing device in a perspective front view
  • FIG. 10 shows a longitudinal sectional view corresponding to FIG. 9 with additionally mounted drive unit.
  • a mobile processing device 1 which serves to rework existing holes 2 in a turbine or generator clutch 3. Specifically, it is important to avoid high local stress concentrations at transition radii in the region of flat depressions of the coupling bores 2 and associated cracking on the coupling 3, by increasing the transition radii by expanding the diameter of the counterbores.
  • the processing of the coupling holes 2 should be done in-situ, which means that the coupling flanges 3a, 3b of the clutch 3 with each other remain ver ⁇ prevented and the fitting is achieved only in the region of the coupling hole 2 to be processed itself.
  • the machining device 1 comprises three modules, namely a central clamping unit 4 via which the machining ⁇ processing device can be clamped in a to be processed coupling hole 2 1, a tool holder 5, wherein the clamping unit 4 passes through axially and in the region of its front end face of a machining tool W here in the form of a turning tool, and a drive unit 6, which is coupled to the rear end portion of the tool holder 5 to the tool holder 5 to rotate.
  • a main body 7 hollow cylindrical basic shape which is a longitudinal axis X defined and inserted axially into the coupling hole to be machined. 2
  • the main body 7 is divided axially into two hollow cylindrical basic body elements 7a, 7b, which are inserted into one another and clamped together.
  • radial Ge ⁇ wind holes 8 are indicated for corresponding clamping screws.
  • the clamping unit 4 further comprises a clamping sleeve 9, which is pushed onto the front main body member 7 a from the front side and can be actuated to a
  • the clamping sleeve 9 is provided at its inner side with cone ⁇ surfaces 10 which taper from the axial ends of the clamping sleeve 9 to its center.
  • the conical surfaces 10 cooperate with corresponding, likewise conical outer surfaces 11 of two clamping bushes 12, which are pushed onto the base body 7 and support the clamping sleeve 8 on the inside, in such a way that the clamping sleeve 8 is radially apart ⁇ pressed when the clamping bushes 12 are compressed.
  • To generate a corresponding pressure force includes the clamping unit 4, a clamping nut 13 which is screwed onto the front end of the base body 7 and is in contact with the prede ⁇ Ren clamping sleeve 12, so that these under Auf ⁇ expansion of the clamping sleeve 9 to the rear, ie in the drawing to the right, in Direction of the rear clamping sleeve 11 is pressed, which is supported axially ⁇ on a bearing surface of the base body 6 from ⁇ to fix the clamping unit 4 in the coupling pin ⁇ bore.
  • the tool holder 5 has a substantially sleeve-like section with a longitudinal bore, which engages the front main body member 7 a of the main body 7 axially ⁇ .
  • the tool holder 5 is rotatably supported in the front base body 7a by needle bearings 14 about the longitudinal axis X.
  • clamping means 15 provided for attachment of the tool W.
  • the clamping means 15 are formed in the form of a clamping holder, which in its front
  • End face has a receptacle 16a for a lathe tool and a central bore 16b for a drilling tool.
  • the receptacle 16a open laterally a plurality of threaded holes 17, in which clamping screws 18 are screwed for fixing the turning tool in the receptacle 16a.
  • the receptacle is open to a radial edge region of the tool holder 5.
  • her opposite, closed ⁇ ended end opens a threaded hole 19 into which a
  • Screw 20 is screwed, which serves as a stop for positioning tion of the turning tool in the receptacle 16 a.
  • coupling means 21 are provided for connecting the tool holder 5 to the drive unit 6.
  • a clamping screw 21 is provided as a coupling means, which axially passes through the tool holder 5, that is, the longitudinal bore of the sleeve-like portion and protrudes from the rear end portion to produce a rotationally fixed connection with an intermediate shaft 22 to the drive unit ⁇ 6.
  • the drive unit 6 comprises a pneumatic drive 23, which extends parallel to the base body 7 and has a distance from the main body 7 such that the pneumatic drive 23 lies radially outside the coupling flange 3a, 3b.
  • the pneumatic drive 23 is the art ⁇ oriented so that its drive shaft 24 projecting rearward from a connecting flange 25 of the drive 23rd
  • the drive shaft 24 is operatively connected to the tool holder 5 via a gear 26, here a toothed belt transmission.
  • the gear 26 comprises a pinion in the form of a toothed belt pulley 27, which sits on the drive shaft 24 of the pneumatic drive 23, and a corresponding, also designed as a toothed belt pulley 28, which in a fixed to the housing 25 of the drive 23 gear ⁇ housing 26 a of Drive unit 6 is mounted rotatably about ball bearing 30 about the longitudinal axis X and is connected to the drive pulley 24 provided on the toothed belt pulley 27 via a toothed belt 29, which runs around the toothed belt pulleys 27, 28.
  • To the gear 26 also includes the mentioned intermediate shaft 22, which is formed as a splined shaft and engages with a wedge ⁇ formed as a hub and driven into the lower toothed belt pulley ⁇ 28 intermediate bushing 31 and axially slidably, but rotatably held.
  • the intermediate shaft 22 In its front end face, the intermediate shaft 22 has a threaded bore 32, via which it is braced axially with the tool holder 5 via the clamping screw 21.
  • the intermediate shaft 22a positively engages to produce a rotationally fixed connection between the components.
  • the adjusting mechanism comprises a threaded rod 33, which runs coaxially to the longitudinal axis X and is held axially fixed on the intermediate shaft 22.
  • the threaded rod 33 engages in the rear axial end of the intermediate shaft 22 and supported therein rotatably through ball bearings 34, so that the intermediate shaft 22 and entspre ⁇ accordingly the can rotate relative to the threaded rod 33 about the longitudinal axis X with its associated tool holder.
  • the adjusting mechanism further has a worm gear 35, which is in engagement with the threaded rod 33 and can be actuated manually or via a motor drive in order to axially adjust the threaded rod 33.
  • a handwheel 36 is provided, via which the worm gear 35 can be actuated. It can also be provided coupling options for connecting a cordless screwdriver.
  • guide means are provided which guide the threaded rod ⁇ straight and against rotation about the
  • a guide pin 37 is screwed to the rear end face of the threaded rod 33, which engages in a corresponding guide groove 38 of a Axialto ⁇ tion 39 which is held on a worm gear 40 of the worm gear 35, which in turn is fixed to the gear housing 26a.
  • the guide groove 38 also specifies the maximum adjustment path of the tool holder 5.
  • the clamping unit 4 is first in the coupling bore 2 axially from the front, ie in Figure 9 from the left, inserted and the clamping sleeve 9 is actuated by rotation of the clamping nut 13 to clamp the clamping unit 4 in the coupling bore 2 and to center (see Figure 9). Subsequently, the drive unit on ⁇ 6 is assembled by the intermediate connector is inserted from the rear of the Kupp ⁇ lung bore 2 ago in the rear foundation body member 7b 31 (see Figure 10).
  • the tool holder 5 is inserted into the main body 7 of the clamping unit 4 from the front side until it comes into contact with the intermediate shaft 22 of the drive unit 6 and the engagement contours 5a, 22a of the tool holder 5 and the intermediate shaft 22 can be engaged with each other, to make a rotationally fixed connection between the two components.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

L'invention concerne un dispositif d'usinage (1) mobile pour un usinage in situ d'alésages (2) préconfectionnés, en particulier d'alésages (2) de deux flasques d'accouplement (3a, 3b) reliés l'un à l'autre, ledit dispositif d'usinage comprenant une unité de serrage (6) comportant un corps de base (7) de forme de base cylindrique creuse, lequel définit un axe longitudinal (X) et peut être inséré axialement dans un alésage d'accouplement, l'unité de serrage comportant également un manchon de serrage (9) qui entoure le corps de base (7) et peut être actionné de manière à déplacer et/ou à élargir une zone de serrage du manchon de serrage (9) radialement vers l'extérieur et ainsi à fixer le corps de base (7) dans un alésage d'accouplement, un porte-outil (W) qui traverse axialement le corps de base (7) et est monté de manière à tourner autour de l'axe longitudinal (X) du corps de base (7) et à se déplacer axialement, des moyens de serrage (15) pour monter un outil (W) se trouvant ou pouvant être montés à une extrémité axiale avant du porte-outil (W), et des moyens d'accouplement (21) destinés à relier le porte-outil (W) à une unité d'entraînement (6) se trouvant à l'extrémité axiale arrière du porte-outil (W).
PCT/EP2018/055542 2017-04-05 2018-03-07 Dispositif d'usinage pour usinage in situ d'alésages préconfectionnés WO2018184784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017205795.5A DE102017205795A1 (de) 2017-04-05 2017-04-05 Bearbeitungseinrichtung für eine in-situ Bearbeitung von vorgefertigten Bohrungen
DE102017205795.5 2017-04-05

Publications (1)

Publication Number Publication Date
WO2018184784A1 true WO2018184784A1 (fr) 2018-10-11

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PCT/EP2018/055542 WO2018184784A1 (fr) 2017-04-05 2018-03-07 Dispositif d'usinage pour usinage in situ d'alésages préconfectionnés

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WO (1) WO2018184784A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018106427U1 (de) * 2018-11-13 2018-11-20 PF-Schweißtechnologie GmbH Schälgerät mit elektrischem Batterieantrieb

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161127A (en) * 1977-04-08 1979-07-17 Tiffin Patrick L Remotely operable portable boring tool
US4758121A (en) * 1986-08-13 1988-07-19 Westinghouse Electric Corp. Boring machine
US5030041A (en) * 1990-04-06 1991-07-09 Westinghouse Electric Corp. Compact boring system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580931A (en) * 1983-12-15 1986-04-08 The United States Of America As Represented By The Secretary Of The Navy In-situ machine for refurbishing a bore in a workpiece
ITBO20020411A1 (it) * 2002-06-27 2003-12-29 Sir Meccanica S R L Macchina alesatrice saldatrice portatile
CN101797693B (zh) * 2010-04-27 2011-09-14 西安飞机工业（集团）有限责任公司 一种同轴双向孔的镗铰装置
ITCZ20120006A1 (it) * 2012-04-10 2013-10-11 Francesco Costanzo Macchina barenatrice portatile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161127A (en) * 1977-04-08 1979-07-17 Tiffin Patrick L Remotely operable portable boring tool
US4758121A (en) * 1986-08-13 1988-07-19 Westinghouse Electric Corp. Boring machine
US5030041A (en) * 1990-04-06 1991-07-09 Westinghouse Electric Corp. Compact boring system

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