EP0802017A1 - 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
EP0802017A1
EP0802017A1 EP97101583A EP97101583A EP0802017A1 EP 0802017 A1 EP0802017 A1 EP 0802017A1 EP 97101583 A EP97101583 A EP 97101583A EP 97101583 A EP97101583 A EP 97101583A EP 0802017 A1 EP0802017 A1 EP 0802017A1
Authority
EP
European Patent Office
Prior art keywords
carrier
machined
workpiece
pressure
expansion chambers
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.)
Granted
Application number
EP97101583A
Other languages
German (de)
English (en)
Other versions
EP0802017B1 (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 has fixed, predetermined dimensions.
  • the sanding belt is wider and lies against the side surfaces of the shoe in the course of fine sanding.
  • the pressure shoe strikes the flange surfaces of the workpiece to be machined at the end of the oscillation stroke. Only at the end of an oscillation stroke does the grinding belt come into contact with the flange surfaces to be machined and the rounded transitions adjoining the flange surfaces.
  • the contact time is short. The result is inadequate machining of the transitions between the collar surfaces and the bearing journal. Ring-shaped grinding marks with annoying notch effects remain on the collar surfaces and rounded transitions. The notch effects are the cause of voltage peaks that can cause the machine part to fatigue when the crankshafts are subjected to high loads.
  • the invention is based on the object of specifying measures in a device of the type described at the outset in order to improve the fine grinding on the rounded transitions between the shaft section and the flange surfaces.
  • the invention teaches that the pressure shoe has a carrier and actuators connected on both sides to the carrier, which the grinding belt always during the fine grinding to the Press on rounded transitions and collar surfaces and follow the oscillating movements.
  • the invention is based on the knowledge that disruptive grinding marks in the region of the rounded transitions adjoining the collar surfaces can only be avoided if the grinding belt remains in contact with the entire surface to be machined despite the oscillating movements which the pressure shoe or the workpiece carry out.
  • the technical implementation of this consideration is to equip the pressure shoe with adjusting devices that follow the oscillation movements. There are various possibilities for the further structural design, which are explained below.
  • a first embodiment provides that the actuating devices consist of fluid-loaded expansion chambers with a variable volume, on the outside of which the abrasive belt rests.
  • a device for the fluid supply and fluid distribution is connected to the expansion chambers, so that during the oscillatory movements a fluid exchange between the expansion chambers can change the volume of the expansion chambers. Gaseous and liquid media can be used as fluids.
  • the invention teaches that a molded part is placed on the carrier, which consists of a sole fastened to the end face of the carrier and molded to the sole, elastically deformable legs, the legs having an expansion fold and their free leg ends to form the Expansion chambers are connected pressure-tight to the side surfaces of the carrier.
  • the molding can be manufactured precisely and inexpensively, for example, as a molded plastic part.
  • the choice of material and dimensioning of the thickness of the sole enable the pressure properties of the pressure shoe to be adjusted.
  • the fluid supply and the fluid exchange between the expansion chambers are expediently carried out through bores in the carrier.
  • expansion chambers Another possibility for the constructive design of the expansion chambers consists in the use of expandable hoses, which are arranged in lateral grooves of the carrier and connect without gaps and tangentially to the end face of the carrier acting on the grinding belt.
  • a further embodiment of the invention provides that the actuating devices are designed as cylinder / piston arrangements, the pistons being inserted into lateral fluid-loaded and interconnected cylinder bores of the carrier, and shaped elements being connected to the pistons, the contour of which is adapted to the transitions to be machined .
  • the shaped elements can be designed as ring segments which have pressure surfaces which are matched to the shaft section to be machined and the collar surface to be machined.
  • the cylinder bores are aligned parallel to the shaft axis.
  • the shaped elements are essentially adapted to the geometry of the rounded transition to be machined between the collar surface and the bearing journal.
  • the actuating devices have sliding elements which can be moved on the lateral wedge surfaces of the carrier against the surfaces of the workpiece to be machined and which have a contour adapted to the workpiece surfaces.
  • the carrier is preferably equipped with cylinder / piston arrangements which work on the sliding elements and move them against the surfaces of the workpiece to be machined.
  • the return movement of the sliding elements, likewise along the associated wedge surface, is carried out by a tension spring connected to the sliding elements.
  • the sliding elements are only spring-loaded. In this embodiment, the sliding elements are acted upon by at least one spring supported on the carrier, which move the sliding elements along the wedge surfaces against the surfaces of the workpiece to be machined.
  • the device according to the invention is characterized in that a shaft section of the workpiece, collar surfaces adjoining on both sides and rounded transitions between the collar surfaces and the shaft section can be honed or finely machined in a single operation, a high surface quality being achieved on all surfaces.
  • the figures show sections of a device for the fine grinding of bearing surfaces on shafts, in particular crankshafts.
  • the basic structure of the device includes a rotary drive for the workpiece to be machined, at least one pressure shoe 1, an oscillation drive that generates oscillating relative movements in the longitudinal direction between the workpiece 2 and the pressure shoe 1, as well as an abrasive belt 3 that is applied to the forehead and Side surfaces of the pressure shoe 1 abuts.
  • the rotary drive and the oscillation drive can be carried out in a manner known per se and are not shown in the figures.
  • Fig. 1a to 1d and 3a to 3d it can be seen that the pressure shoe 1 can be inserted into an annular space of the rotating workpiece 2 delimited by two collar surfaces 4 and the abrasive belt 3 presses against a shaft section 5 to be machined, which between the Collar surfaces 4 is arranged and connects to the collar surfaces 4 by rounded transitions.
  • 1a and 3a show the pressure shoe 1 introduced in the figures before the start of the fine machining. There is a gap between the abrasive belt 3 resting on the side surfaces and the flange surfaces 4, so that the flange surfaces 4 cannot be damaged by grinding marks when the pressure shoe 1 is inserted into the annular space.
  • the pressure shoe 1 has a carrier 6 and actuators 7 connected to the carrier 6 on both sides, which always press the grinding belt 3 against the rounded transitions and collar surfaces 4 during fine grinding and follow the oscillatory movements. This can be easily understood from a comparative view of FIGS. 1a to 1d and 3a to 3d. There are various options for the structural design of the actuating devices 7, which are explained in more detail below.
  • the adjusting devices 7 consist of fluid-loaded expansion chambers 8 with variable volumes, on the outside of which the abrasive belt 3 rests.
  • a device 9 for the fluid supply and fluid distribution is connected to the expansion chambers 8. This results in a fluid exchange between the expansion chambers 8 that changes the volume of the expansion chambers 8 during the oscillatory movements.
  • the expansion chambers 8 are formed by a molded part 10 placed on the carrier 6, which consists of a molded part on the end face of the support 6 attached sole 11 and formed on the sole 11, elastically deformable legs 12.
  • the legs 12 have an expansion fold 13, and their free leg ends are connected to the side surfaces of the carrier 6 in a pressure-tight manner, forming the expansion chambers 8.
  • the carrier 6 contains bores 9 for a fluid supply and a fluid exchange between the Expansion chambers 8 (Fig. 1b).
  • the molded part 10 can be designed as a plastic molded part.
  • the pressure properties of the pressure shoe 1 can be set and changed by the design of the sole 11, the dimensioning of the sole thickness and the choice of material.
  • the sole 11 is usually set harder than the regions of the molded part 10 which act on the rounded transitions and collar surfaces 4. From Fig. 2 it is clear that the molded part 10 placed on the carrier 6 is designed as a ring segment, the radius of the ring segment being adapted to the shaft section 5 to be machined.
  • the expansion chambers 8 consist of expandable hoses 14 which are arranged in lateral grooves of the carrier 6 and connect without gaps and tangentially to the end face of the carrier 6 which acts on the grinding belt 3.
  • a comparative examination of the figures shows that the volume of the tubes 14 changes due to fluid exchange during the oscillatory movements and the tubes 14 attach to the surfaces 2 of the workpiece to be machined and thereby deform. This ensures constant contact of the grinding belt 3 on the workpiece surfaces to be machined, regardless of the oscillation stroke.
  • the end face of the carrier 6 and the hoses 14 adjoining the edge are adapted to the geometry of the shaft section 5 to be machined (FIG. 4). 4 also shows that the workpiece 2 during the Finishing rotates and the pressure shoe 1 performs oscillating movements in the longitudinal direction of the shaft.
  • the actuating devices 7 consist of cylinder / piston arrangements 15/16.
  • the pistons 15 are inserted in lateral fluid-loaded and interconnected cylinder bores 16 of the carrier 6.
  • molded elements 17 are connected to the pistons, the contours of which are adapted to the transitions to be machined.
  • the cylinder bores 16 can be aligned parallel to the shaft axis.
  • the shaped elements consist of ring segments which have pressure surfaces 18 adapted to the shaft section 5 to be machined and to the collar surface 4 to be machined (cf. FIG. 5).
  • the cylinder bores 16 can, however, also be arranged angularly with an orientation towards the transitions to be machined in the carrier 6 (cf. FIG. 6).
  • the adjusting devices 7 have sliding elements 19 which can be moved on lateral wedge surfaces 20 of the carrier 6 against the surfaces of the workpiece 2 to be machined and which have a contour adapted to the workpiece surface. So that the sliding elements 19 rest with sufficient pressure on the surfaces of the workpiece 2 to be machined, cylinder / piston arrangements 21 are provided in the embodiment shown in FIGS. 7a, 7b, which are fastened to the carrier 6 and onto which Sliding elements 19 work. The cylinder / piston assemblies 21 move the sliding elements 19 against the surfaces of the workpiece 2 to be machined. A tension spring 22 for the return movement is also connected to the sliding elements 19. In the variant shown in FIG.
  • the sliding elements 19 are moved along the wedge surfaces 20 against the surfaces of the workpiece 2 to be machined by spring force.
  • the carrier 6 and the sliding elements 19 are connected to one another by one or a plurality of springs 23 arranged one behind the other in the radial direction.

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)
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 true EP0802017A1 (fr) 1997-10-22
EP0802017B1 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259137A1 (de) * 2002-01-05 2003-10-02 Thielenhaus Ernst Gmbh & Co Kg Verfahren zum Feinschleifen einer Umfangsfläche an einem Werkstück
EP1447170A1 (fr) * 2003-02-12 2004-08-18 Nissan Motor Co., Ltd. Appareil et procédé de finition des surfaces
DE102015008814A1 (de) 2015-07-10 2017-01-12 Thielenhaus Technologies Gmbh Andrückschuh mit Expansionskammer
EP3181293A1 (fr) 2015-12-18 2017-06-21 Thielenhaus Technologies GmbH Outil de finition à capacité de coupe variable localement
WO2019115323A1 (fr) * 2017-12-14 2019-06-20 Thielenhaus Technologies Gmbh Sabot de pressage

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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
ATE515371T1 (de) * 2009-11-25 2011-07-15 Supfina Grieshaber Gmbh & Co Finishvorrichtung
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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883804A (en) * 1955-11-14 1959-04-28 Curtiss Wright Corp Belt abrading machines
EP0219301A2 (fr) * 1985-10-08 1987-04-22 Industrial Metal Products Corporation Méthode et dispositif de superfinition
GB2269553A (en) * 1992-08-14 1994-02-16 Phillips J D Corp Crankpin grinder

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484353A (en) * 1922-10-05 1924-02-19 Ira R Kidwell Honing device for bores of internal-combustion engines
US1560507A (en) * 1923-11-05 1925-11-03 Albert F Froussard Grinder
DE3242095C2 (de) * 1982-11-13 1986-02-20 Ernst Thielenhaus KG, 5600 Wuppertal Schleifmaschine für das Feinschleifen einer Kurbelwelle
US4796387A (en) * 1987-11-19 1989-01-10 Johnson James N Micro-abrasive finishing device
US4945683A (en) * 1989-07-10 1990-08-07 J. D. Phillips Corporation Abrasive belt grinding machine
US4991361A (en) * 1989-11-16 1991-02-12 Minnesota Mining And Manufacturing Company Cylinder hone
US5311704A (en) * 1992-05-20 1994-05-17 Barton Ii Kenneth A Method and apparatus for correcting diametrical taper on a workpiece
US5210978A (en) * 1992-05-26 1993-05-18 J. D. Phillips Corporation Nose piece retainer for abrasive belt backing shoe
JPH06155271A (ja) * 1992-11-16 1994-06-03 Fuji Photo Film Co Ltd 磁気ディスクのバーニッシュ方法および装置
US5529529A (en) * 1994-08-30 1996-06-25 Industrial Metal Products, Corporation Cylinder liner microfinishing apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883804A (en) * 1955-11-14 1959-04-28 Curtiss Wright Corp Belt abrading machines
EP0219301A2 (fr) * 1985-10-08 1987-04-22 Industrial Metal Products Corporation Méthode et dispositif de superfinition
GB2269553A (en) * 1992-08-14 1994-02-16 Phillips J D Corp Crankpin grinder

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259137A1 (de) * 2002-01-05 2003-10-02 Thielenhaus Ernst Gmbh & Co Kg Verfahren zum Feinschleifen einer Umfangsfläche an einem Werkstück
DE10259137B4 (de) * 2002-01-05 2004-07-15 Thielenhaus Technologies Gmbh Verfahren zum Feinschleifen einer Umfangsfläche an einem Werkstück
EP1447170A1 (fr) * 2003-02-12 2004-08-18 Nissan Motor Co., Ltd. Appareil et procédé de finition des surfaces
US7794306B2 (en) 2003-02-12 2010-09-14 Nissan Motor Co., Ltd. Surface finishing apparatus and related method
DE102015008814A1 (de) 2015-07-10 2017-01-12 Thielenhaus Technologies Gmbh Andrückschuh mit Expansionskammer
US10589396B2 (en) 2015-07-10 2020-03-17 Thielenhaus Technologies Gmbh Pressure shoe with expansion chamber
EP3181293A1 (fr) 2015-12-18 2017-06-21 Thielenhaus Technologies GmbH Outil de finition à capacité de coupe variable localement
DE102015122189A1 (de) 2015-12-18 2017-06-22 Thielenhaus Technologies Gmbh Finishwerkzeug mit lokal variierender Schnittigkeit
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
EP0802017B1 (fr) 1999-10-27

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