EP0802017B1 - Dispositif pour le rodage d'arbres, en particulier de vilebrequins - Google Patents

Dispositif pour le rodage d'arbres, en particulier de vilebrequins Download PDF

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Publication number
EP0802017B1
EP0802017B1 EP97101583A EP97101583A EP0802017B1 EP 0802017 B1 EP0802017 B1 EP 0802017B1 EP 97101583 A EP97101583 A EP 97101583A EP 97101583 A EP97101583 A EP 97101583A EP 0802017 B1 EP0802017 B1 EP 0802017B1
Authority
EP
European Patent Office
Prior art keywords
holder
machining
workpiece
collar
pressure shoe
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP97101583A
Other languages
German (de)
English (en)
Other versions
EP0802017A1 (fr
Inventor
Manfred G. Becker
Peter C. Dinardi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernst Thielenhaus GmbH and Co KG
Original Assignee
Ernst Thielenhaus GmbH and Co KG
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 Ernst Thielenhaus GmbH and Co KG filed Critical Ernst Thielenhaus GmbH and Co KG
Priority to DE29718547U priority Critical patent/DE29718547U1/de
Publication of EP0802017A1 publication Critical patent/EP0802017A1/fr
Application granted granted Critical
Publication of EP0802017B1 publication Critical patent/EP0802017B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • 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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency

Definitions

  • the Pressure shoe fixed, specified dimensions.
  • the sanding belt is wider and settles in the course of fine grinding to the side surfaces of the shoe.
  • the pressure shoe strikes oscillations at the end of the Oscillation stroke on the collar surfaces of the machined Workpiece. Only at the end of an oscillation stroke the sanding belt comes with those to be processed Collar surfaces and those adjoining the collar surfaces rounded transitions in touch.
  • the contact time is short.
  • Inadequate editing of the transitions results between flange surfaces and bearing journal.
  • On the collar surfaces and rounded transitions remain with annular grinding marks disruptive notch effects.
  • the notch effects are the cause of Voltage peaks that occur in highly stressed crankshafts can cause fatigue fracture of the machine part.
  • the invention has for its object in a Device of the type described in the introduction to specify the fine grinding on the rounded Transitions between the shaft section and collar surfaces improve.
  • the invention teaches that Pressure shoe a carrier and on both sides of the carrier has connected actuators that Always keep the sanding belt in place during fine sanding Press on the rounded transitions and collar surfaces and press the Oscillatory movements follow.
  • the invention is based on the Realization that disruptive grinding marks in the area of the The rounded transitions following the collar surfaces are only avoided can be if the sanding belt despite the Oscillating movements that the pressure shoe or that Execute workpiece, constantly in contact with the total area to be processed.
  • This consideration is using the pressure shoe Equip actuators that the oscillatory movements consequences. For further design there are various possibilities, the following are explained.
  • a first embodiment provides that the Actuators from fluid-loaded expansion chambers with variable volume, on the outside of which Sanding belt is applied. There is one at the expansion chambers Fluid supply and distribution device connected so that a during the oscillatory movements fluid exchange changing the volume of the expansion chambers can take place between the expansion chambers. As are fluids gaseous and liquid media can be used.
  • the carrier Molding which consists of a on the end face the sole attached to the wearer and molded onto the sole, there is elastically deformable legs, the legs have an expansion fold and their free leg ends forming the expansion chambers pressure-tight to the Side surfaces of the carrier are connected.
  • the molding is precise, for example, as a molded plastic part inexpensive to manufacture. Material selection and dimensioning of the Thickness of the sole allow adjustment of the Pressure properties of the pressure shoe.
  • the fluid supply and the fluid exchange takes place between the expansion chambers expedient in this version through holes in the carrier.
  • Expansion chambers Another possibility for the constructive design of the Expansion chambers consist in the use of stretchy ones Hoses arranged in side grooves of the wearer are free of gaps and tangential to the grinding belt Connect the end face of the beam.
  • the Actuators designed as cylinder / piston arrangements are, the pistons in the lateral fluid and interconnected cylinder bores of the carrier are used and with the piston shaped elements are connected, the contour of which is to be machined Transitions is adjusted.
  • the form elements can be as Ring segments to be formed on the to be machined Shaft section and the collar surface to be machined have adapted pressure surfaces.
  • the cylinder bores are parallel to the shaft axis in this version aligned.
  • the form elements are essentially the geometry of the rounded transition to be machined adjusted between the collar surface and the journal.
  • the actuators Have sliding elements on the side wedge surfaces of the Carrier against the surfaces of the workpiece to be machined are movable and adapted to the workpiece surfaces Have a contour.
  • the carrier is preferably with cylinder / piston arrangements equipped that work on the sliding elements and this move against the surfaces of the workpiece to be machined.
  • the return movement of the sliding elements, also along the assigned wedge surface, is made by a to the Tension spring connected to sliding elements.
  • the sliding elements exclusively are spring loaded. In this version they are Sliding elements of at least one supported on the carrier Spring applied, which the sliding elements on the Wedge surfaces along against the surfaces to be machined Move workpiece.
  • the device according to the invention is characterized in that that a shaft section of the workpiece, on both sides adjoining collar areas and rounded transitions between the collar surfaces and the shaft section in one operation can be honed or machined, with all Surfaces a high surface quality is achieved.
  • the figures show sections from a device for the fine grinding of bearing surfaces on shafts, especially crankshafts.
  • the basic structure of the Device include a rotary drive for that machining workpiece, at least one pressure shoe 1 Oscillation drive, the oscillating relative movements in the longitudinal direction between the workpiece 2 and the Pressure shoe 1 generated, and a sanding belt 3, the during processing on the front and side surfaces of the Pressure shoe 1 is applied.
  • the rotary drive and the Oscillation drives are in a manner known per se executable and not shown in the figures.
  • FIGS. 1a to 1d and 3a to 3d one can see that the pressure shoe 1 in one of two Flanges 4 limited annulus of the rotating Workpiece 2 is insertable and the grinding belt 3 against presses a shaft section 5 to be machined, which is arranged between the collar surfaces 4 and by rounded transitions to the collar surfaces 4 connects.
  • the 1a and 3a show the one introduced in the figures Pressure shoe 1 before the start of finishing. Between the abrasive belt 3 resting on the side surfaces and the Collar surfaces 4 there is a gap, so that the Collar surfaces 4 are not damaged by grinding marks can when the pressure shoe 1 is inserted into the annular space becomes.
  • the pressure shoe 1 has a carrier 6 and on both sides the carrier 6 connected actuators 7, the the grinding belt 3 always during fine grinding press against the rounded transitions and collar surfaces 4 and follow the oscillatory movements. From one comparative consideration of FIGS. 1a to 1d and 3a to 3d this is easily understandable. For the constructive design of the adjusting devices 7 There are several options that follow are explained in more detail.
  • Actuators 7 from fluid-loaded expansion chambers 8 with variable volume, on the outside the grinding belt 3 is applied.
  • a device 9 for the fluid supply and Fluid distribution connected to the expansion chambers 8 .
  • a the volume of the Expansion chambers 8 changing fluid exchange between the Expansion chambers 8.
  • the expansion chambers 8 from a molded part 10 placed on the carrier 6 formed, which consists of a on the end face of the carrier 6 attached sole 11 and molded onto the sole 11, there is elastically deformable legs 12.
  • the thigh 12 have an expansion fold 13, and their free Leg ends are forming the expansion chambers 8 pressure-tight on the side surfaces of the carrier 6 connected.
  • the carrier 6 contains holes 9 for one Fluid supply and fluid exchange between the Expansion chambers 8 (Fig. 1b).
  • the molded part 10 can be used as Be molded plastic part.
  • the sole dimensioning the sole thickness and choice of material are the pressure characteristics of the pressure shoe 1 adjustable and changeable.
  • the sole is usually 11 set harder than the areas of the molded part 10 that act on the rounded transitions and collar surfaces 4.
  • Out Fig. 2 shows that the placed on the carrier 6 Molding 10 is designed as a ring segment, the Radius of the ring segment on the one to be machined Shaft section 5 is adapted.
  • the expansion chambers 8 consist of stretchable Hoses 14, which are in the lateral grooves of the carrier 6 are arranged and gap-free and tangential to that End face of the carrier 6 acting on the grinding belt 3 connect.
  • a comparative look at the figures it can be seen that the volume of the tubes 14 through Fluid exchange during the oscillatory movements changed and the hoses 14 to the create machining surfaces 2 of the workpiece while doing so deform. Constant contact of the grinding belt 3 the workpiece surfaces to be machined is independent of the oscillation stroke, ensured in this way.
  • the End face of the carrier 6 and the edge subsequent hoses 14 are to the geometry of the machining shaft section 5 adapted (Fig. 4). Of the Fig. 4 also shows that the workpiece 2 during the Finishing rotates and the pressure shoe 1 in Wavelength direction performs oscillatory movements.
  • the invention consists of the actuators 7 Cylinder / piston arrangements 15/16.
  • the pistons 15 are in lateral fluidized and connected Cylinder bores 16 of the carrier 6 are used. Furthermore are connected to the piston shaped elements 17, the contour is adapted to the transitions to be processed.
  • the Cylinder bores 16 can be parallel to the shaft axis be aligned.
  • the Shaped elements from ring segments attached to the machining shaft section 5 and to machining collar surface 4 adapted pressure surfaces 18th have (see Fig. 5).
  • the cylinder bores 16 can but also angular with an orientation to the machining transitions may be arranged in the carrier 6 (see Fig. 6).
  • the actuators have 7 sliding elements 19 on the side wedge surfaces 20 of the carrier 6 against the surfaces of the workpiece to be machined 2 are movable and one on the workpiece surface have an adapted contour. So that the sliding elements 19 with sufficient pressure on the surfaces to be worked on Workpiece 2 rest, are in the in Fig. 7a, 7b shown embodiment cylinder / piston assemblies 21st provided, which are attached to the carrier 6 and on the Sliding elements 19 work. The cylinder / piston assemblies 21 move the sliding elements 19 against those to be machined Surfaces of the workpiece 2. At the sliding elements 19 is also a tension spring 22 for the return movement connected. In the variant shown in Fig. 8 the sliding elements 19 move along the Wedge surfaces 20 against the surfaces to be machined Workpiece 2 by spring force.
  • the carrier 6 and the Sliding elements 19 are through or in the radial direction several springs 23 arranged one behind the other connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (10)

  1. Dispositif pour le rodage d'arbres, en particulier de vilebrequins, comprenant
    un moyen d'entraínement en rotation pour la pièce à usiner (2),
    au moins un sabot presseur (1) qui peut être introduit dans un espace annulaire de la pièce en rotation (2) délimité par deux surfaces de collets (4),
    un moyen d'entraínement oscillatoire qui génère des mouvements relatifs oscillants dans la direction longitudinale de l'arbre entre la pièce (2) et le sabot presseur (1), et
    une bande abrasive (3) appliquée contre des surfaces frontale et latérales du sabot presseur (1),
    le sabot presseur (1) appliquant la bande abrasive (3) contre une portion d'arbre à usiner (5) qui est située entre les surfaces de collets (4) et qui est reliée aux surfaces de collets (4) par des parties de transition arrondies, caractérisé en ce que le sabot presseur (1) comporte un support (6) et, reliés au support (6) de part et d'autre de celui-ci, des dispositifs de réglage (7) qui appliquent la bande abrasive (3) en permanence contre les parties de transition arrondies et les surfaces de collets (4) durant le rodage et suivent les mouvements oscillatoires.
  2. Dispositif selon la revendication 1, caractérisé en ce que les dispositifs de réglage (7) sont constitués par des chambres expansibles (8) à volume variable qui sont alimentées par un fluide et contre le côté extérieur desquelles est appliquée la bande abrasive (3), et en ce qu'un dispositif (9) d'alimentation et de distribution de fluide est relié aux chambres expansibles (8), ce qui, lors du mouvement oscillatoire, crée entre les chambres expansibles (8) une circulation de fluide modifiant le volume des chambres expansibles (8).
  3. Dispositif selon la revendication 2, caractérisé en ce que, sur le support (6) est rapportée une pièce moulée (10) qui est constituée d'une semelle (11) fixée à la face frontale du support (6) et de branches déformables élastiquement (12) surmoulées sur la semelle (11), les branches (12) étant pourvues d'un pli d'extension (13) et leurs extrémités libres étant reliées aux faces latérales du support (6) de manière étanche à la pression en formant les chambres expansibles (8), et en ce que le support (6) est pourvu de trous (9) d'alimentation et de circulation de fluide entre les chambres expansibles (8).
  4. Dispositif selon la revendication 2, caractérisé en ce que les chambres expansibles (8) sont constituées par des gaines extensibles (14) qui sont disposées dans des rainures latérales du support (6) et rejoignent sans interstice et tangentiellement la face frontale du support (6) plaquée contre la bande abrasive (3).
  5. Dispositif selon la revendication 1, caractérisé en ce que les dispositifs de réglage (7) sont conçus sous la forme d'agencements à cylindre/piston (15, 16), les pistons (15) étant logés dans des alésages cylindriques latéraux (16) du support (6) qui sont alimentés en fluide et reliés entre eux, et des éléments moulés (17) dont le contour épouse celui des parties de transitions à usiner étant reliés aux pistons (15).
  6. Dispositif selon la revendication 5, caractérisé en ce que les éléments moulés (17) sont conçus sous la forme de segments annulaires qui comportent des surfaces de pression (18) adaptées à la portion d'arbre à usiner (5) ainsi qu'à la surface de collet à usiner (4), et en ce que les alésages cylindriques (16) sont orientés parallèlement par rapport à l'axe de l'arbre.
  7. Dispositif selon la revendication 5, caractérisé en ce que, dans le support (6), les alésages cylindriques (16) sont disposés en formant un angle et en étant orientés vers les parties de transition à usiner.
  8. Dispositif selon la revendication 1, caractérisé en ce que les dispositifs de réglage (7) comportent des éléments coulissants (19) qui peuvent se déplacer le long de surfaces latérales en coin (20) du support (6) contre les surfaces à usiner de la pièce (2) et qui présentent un contour adapté aux surfaces de la pièce.
  9. Dispositif selon la revendication 8, caractérisé en ce que le support (6) comporte des agencements à cylindre/piston (21) qui sollicitent les éléments coulissants (19) et les déplacent contre les surfaces à usiner de la pièce (2), et en ce qu'un ressort de traction (22) est relié aux éléments coulissants (19) pour les rappeler.
  10. Dispositif selon la revendication 8, caractérisé en ce que les éléments coulissants (19) sont sollicités par au moins un ressort (23) qui prend appui sur le support (6) et qui déplace les éléments coulissants (19) le long des faces en coin (20) contre les surfaces à usiner de la pièce (2).
EP97101583A 1996-04-19 1997-02-01 Dispositif pour le rodage d'arbres, en particulier de vilebrequins Expired - Lifetime EP0802017B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29718547U DE29718547U1 (de) 1996-04-19 1997-02-01 Vorrichtung für die Feinschleifbearbeitung von Wellen, insbesondere Kurbelwellen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1562996P 1996-04-19 1996-04-19
US15629 1996-04-19

Publications (2)

Publication Number Publication Date
EP0802017A1 EP0802017A1 (fr) 1997-10-22
EP0802017B1 true EP0802017B1 (fr) 1999-10-27

Family

ID=21772548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101583A Expired - Lifetime EP0802017B1 (fr) 1996-04-19 1997-02-01 Dispositif pour le rodage d'arbres, en particulier de vilebrequins

Country Status (3)

Country Link
US (1) US5730647A (fr)
EP (1) EP0802017B1 (fr)
DE (1) DE59700607D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019115323A1 (fr) 2017-12-14 2019-06-20 Thielenhaus Technologies Gmbh Sabot de pressage

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US6309287B2 (en) 1998-01-15 2001-10-30 Ford Global Technologies Cam micro-finishing tool
US6048257A (en) * 1998-10-02 2000-04-11 Kennametal Inc. Abrasive pad holder
US6113471A (en) * 1999-03-24 2000-09-05 Kuebler; David A. Chassis journal corrector system
DE10259137B4 (de) * 2002-01-05 2004-07-15 Thielenhaus Technologies Gmbh Verfahren zum Feinschleifen einer Umfangsfläche an einem Werkstück
US7008294B2 (en) * 2002-07-17 2006-03-07 Erwin Junker Maschinenfabrik Gmbh Method and device for grinding a rotating roller using an elastic steady-rest support
EP1447170B1 (fr) * 2003-02-12 2007-05-30 Nissan Motor Co., Ltd. Appareil et procédé de finition des surfaces
DE102007051047B4 (de) * 2007-10-16 2023-03-23 Nagel Maschinen- Und Werkzeugfabrik Gmbh Andrückeinrichtung für Finishband sowie Vorrichtung und Verfahren zur Finishbearbeitung von Umfangsflächen an zylindrischen Werkstückabschnitten
EP2327510B1 (fr) * 2009-11-25 2011-07-06 Supfina Grieshaber GmbH & Co. KG Dispositif de finition
CN103786083B (zh) * 2014-02-24 2016-05-11 苏州卡波尔模具科技有限公司 玻璃模具腔体抛光设备
DE102015008814A1 (de) 2015-07-10 2017-01-12 Thielenhaus Technologies Gmbh Andrückschuh mit Expansionskammer
DE102015122189A1 (de) 2015-12-18 2017-06-22 Thielenhaus Technologies Gmbh Finishwerkzeug mit lokal variierender Schnittigkeit
CN110315411B (zh) * 2019-06-19 2024-07-16 禹奕智能科技(杭州)有限公司 适用于机器人末端柔性砂带磨抛系统

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019115323A1 (fr) 2017-12-14 2019-06-20 Thielenhaus Technologies Gmbh Sabot de pressage

Also Published As

Publication number Publication date
US5730647A (en) 1998-03-24
DE59700607D1 (de) 1999-12-02
EP0802017A1 (fr) 1997-10-22

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