WO2003062654A1 - Procede d'usinage de manetons d'un vilebrequin - Google Patents

Procede d'usinage de manetons d'un vilebrequin Download PDF

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Publication number
WO2003062654A1
WO2003062654A1 PCT/EP2002/013347 EP0213347W WO03062654A1 WO 2003062654 A1 WO2003062654 A1 WO 2003062654A1 EP 0213347 W EP0213347 W EP 0213347W WO 03062654 A1 WO03062654 A1 WO 03062654A1
Authority
WO
WIPO (PCT)
Prior art keywords
crank pin
bearing surface
machining
crankshaft
bearing
Prior art date
Application number
PCT/EP2002/013347
Other languages
German (de)
English (en)
Inventor
Georg Hauschild
Alfred Heimann
Original Assignee
Hegenscheidt-Mfd Gmbh & 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 Hegenscheidt-Mfd Gmbh & Co. Kg filed Critical Hegenscheidt-Mfd Gmbh & Co. Kg
Publication of WO2003062654A1 publication Critical patent/WO2003062654A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F16C3/08—Crankshafts made in one piece
    • 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
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • 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

Definitions

  • the invention relates to a method for machining crank pins of a crankshaft by machining preliminary and final machining of the bearing surface for the connecting rod bearing of the crank pin.
  • the invention also relates to a crankshaft with at least one crank pin whose bearing surface for the piezo bearing is produced by machining pre-machining and finishing and is bounded on at least one side towards the adjacent crank web by a rolled-in groove.
  • a deep rolling process is used to increase the fatigue strength of the crankshaft of engines for motor vehicles.
  • Hard deep-rolling rollers with a diameter of approximately 15 mm and a radius of approximately 1.3 mm are pressed into the punctures of the bearings, main and pin bearings, and the crankshaft with a defined force, and create a compressive residual stress state via plastic deformation that the fatigue strength of the Crankshaft increased.
  • part of the available axial width of the aforementioned bearings of the crankshaft is required. Only a smaller part N of the available width B of the respective bearing is available as a support for the connecting rod or the bearing in the engine block.
  • the increase in the fatigue strength of the crankshaft is necessary in particular in that area in which the forces exerted by the connecting rod on the crank pin are transmitted to the adjacent main bearing via the cheeks of the crankshaft. This is the area between the crank pin and the crank arm in the top dead center position of the crank pin.
  • the task for the present invention results in increasing the usable width of the support for the connecting rod on the crank pin.
  • the transition between Crank pin and cheek of the crankshaft the required strength can be achieved or the fatigue strength can be increased.
  • the measures required for this should be able to be carried out with the least effort and in an economical manner.
  • the task can be solved in two ways.
  • the stroke of the crank pin is increased, the recesses are worked in and rolled concentrically to the support surface on both sides of the pre-machined support surface and, during the finishing process, the support surface is removed over a section of its circumference to approximately the depth of the recesses.
  • the object can be achieved in that, with a predetermined stroke of the crank pin, the recesses are worked in on both sides of the pre-machined support surface eccentrically to the support surface and rolled and, during the finishing, the support surface is removed over a portion of its circumference to approximately the depth of the recesses.
  • the finishing surface will be removed on a section located in the area of the top dead center of the crank pin during the finishing.
  • This area can either have its center directly at top dead center or, in contrast, be offset by a small angle on both sides of top dead center, depending on where the greatest forces are exerted by the connecting rod on the crank pin.
  • the exact position of the area depends on whether the ignition point in the vehicle engine is selected before or after the top dead center of the crank pin.
  • the ratio of the width N of the support to the width B of the bearing in crankshafts is usually
  • a crankshaft according to the invention is characterized in that the depth of the recess, which laterally delimits the support surface toward both cheeks, is less over a section of the circumference of the support surface of the crank pin than over the rest of the circumference.
  • the puncture has its shallowest depth in the area where the top dead center of the crank pin is located.
  • crankshaft can also be described in such a way that the axial width of the finished bearing surface of the crank pin is different over the circumference of the bearing surface. It also applies here that the axial width of the bearing surface of the crank pin is greatest in the area of the top dead center.
  • a crankshaft 1 consists, for example, of a plurality of main bearings 2 and a plurality of crank pins 3.
  • the crank pin 3 is each connected to a main bearing 2 via the crank arms 4 and 5.
  • the width B of the bearing of the crank pin 3 is determined by the axial distance between the two cheeks 4 and 5.
  • the available width N of the available bearing surface 8 for the connecting rod (not shown) is restricted.
  • the ratio between the support surface 8 with the width N and a theoretical surface with the width B is between the bearing width between
  • the stroke h v is increased slightly compared to a stroke h which is normally customary.
  • the stroke h is the distance that the central axis 9 of the crank pin 3 has from the axis of rotation 10 of the main bearing 2.
  • crank pin 3 receives the outer contour 11 during the pre-machining of the crankshaft. Then the recesses 6 and 7 are rolled in, the bottom of which is circumscribed by the contour 12, which is concentric with the contour 11. The crank pin 3 is then finished, usually by grinding or another suitable process Surface processing, and there is the contour 13, which, as can be clearly seen on the left side of FIG. 1, with respect to the central axis 9 of the crank pin
  • the material removal represented by the hatched area 15 is made at the crank pin 3 in the area of the top dead center 14, while on the opposite side 16 only the material removal represented by the hatched area 17 is made.
  • the material removal 15 gives the support surface 8 a usable width of N 'in the area of the top dead center 14.
  • the opposite side 16 on the other hand, only a usable width of the support surface in the size of N "is achieved by the material removal 17.
  • the dimension N" can be set approximately equal to the dimension N, since in the area 16 between the crank pin 3 and cheeks
  • the theoretically largest available bearing surface is achieved by the width B and the development R of the cylindrical peripheral surface of the crank pin 3 with the radius r.
  • the axis of rotation 10 and the central axis 9 of the crank pin 3 have a predetermined distance corresponding to the stroke h from each other.
  • the outer contour 18 is generated during the machining of the crank pin 3.
  • the punctures are in this outer contour 18 on both sides of the cheeks 4 and 5
  • the circumferential surface 8 of the crank pin 3 each has a length R. Multiplied by the bearing width B, the theoretically largest possible bearing surface R x B is obtained. The need for the recesses makes this the largest possible bearing surface R x B reduced to an area which is defined by the dimensions width N and length R, that is R x N. The corresponding area ratio between the smaller R x N and the larger area R x B is, as already stated, between 0.7 and 0.9.
  • a broadening of the bearing surface 8 in accordance with the dimension N ' is achieved in the area of the top dead center 14.
  • the area gain 23 is shown hatched. Outwardly, this area is delimited by the curved lines 24.
  • the ratio between the area enlarged by the broken lines 25 and the width N and by the curved lines 24 and the widths N 'or N " is between 0.8 and 0.95.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

L'invention concerne un procédé d'usinage de manetons (3) d'un vilebrequin (1) par enlèvement de copeaux de pré-usinage et de finition de la surface d'appui (8) du coussinet de bielle du maneton (3). Dans le cas d'une course supérieure (hv) du maneton (3), les entailles (6, 7) pratiquées des deux côtés de la surface d'appui pré-usinée sont usinées de façon concentrique par rapport à la surface d'appui, puis compressées par laminage. Lors de la finition, une partie périphérique (14) de la surface d'appui (8) est enlevée quasiment jusqu'à la profondeur des entailles (6, 7).
PCT/EP2002/013347 2002-01-24 2002-11-27 Procede d'usinage de manetons d'un vilebrequin WO2003062654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002102547 DE10202547C1 (de) 2002-01-24 2002-01-24 Verfahren zum Bearbeiten von Hubzapfen einer Kurbelwelle sowie danach hergestellte Kurbelwelle
DE10202547.9 2002-01-24

Publications (1)

Publication Number Publication Date
WO2003062654A1 true WO2003062654A1 (fr) 2003-07-31

Family

ID=7712895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/013347 WO2003062654A1 (fr) 2002-01-24 2002-11-27 Procede d'usinage de manetons d'un vilebrequin

Country Status (2)

Country Link
DE (1) DE10202547C1 (fr)
WO (1) WO2003062654A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013221763A1 (de) * 2013-10-25 2015-04-30 Bayerische Motoren Werke Aktiengesellschaft Kurbelwelle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042707B4 (de) * 2004-09-03 2006-07-06 Daimlerchrysler Ag Kurbelwelle und Verfahren zu ihrer Herstellung
DE102006037864A1 (de) * 2006-08-11 2008-02-28 Maschinenfabrik Alfing Kessler Gmbh Verfahren zum Einbringen von Übergangsradien in eine Kurbelwelle und Vorrichtung zur Durchführung des Verfahrens
DE102016201469A1 (de) * 2016-02-01 2017-08-03 Ford Global Technologies, Llc Kurbelwelle für einen Kolbenmotor und Verfahren zu deren Herstellung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939935A1 (de) * 1989-12-02 1991-06-06 Man Nutzfahrzeuge Ag Verfahren zur herstellung einer kurbelwelle
EP0800008A2 (fr) * 1996-04-02 1997-10-08 AVL List GmbH Vilebrequin pour machine à pistons
JP2002122126A (ja) * 2000-10-17 2002-04-26 Toyota Industries Corp クランクシャフト
DE10062769A1 (de) * 2000-12-15 2002-06-20 Man Nutzfahrzeuge Ag Kurbelwelle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE795973A (fr) * 1972-03-02 1973-06-18 Maschf Augsburg Nuernberg Ag Procede de fabrication d'un vilebrequin et vilebrequin obtenu par ce procede
DE2448118A1 (de) * 1974-10-09 1976-04-22 Maschf Augsburg Nuernberg Ag Verfahren zur herstellung einer kurbelwelle und danach hergestellte kurbelwelle
DE4329610C2 (de) * 1993-09-02 1996-08-29 Doerries Scharmann Gmbh Bearbeitungszentrum für Kurbelwellen
DE10040146A1 (de) * 2000-08-17 2002-03-07 Hegenscheidt Mfd Gmbh & Co Kg Werkzeug zum Festwalzen der Einstiche an Lager- oder Hubzapfen von Kurbelwellen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939935A1 (de) * 1989-12-02 1991-06-06 Man Nutzfahrzeuge Ag Verfahren zur herstellung einer kurbelwelle
EP0800008A2 (fr) * 1996-04-02 1997-10-08 AVL List GmbH Vilebrequin pour machine à pistons
JP2002122126A (ja) * 2000-10-17 2002-04-26 Toyota Industries Corp クランクシャフト
DE10062769A1 (de) * 2000-12-15 2002-06-20 Man Nutzfahrzeuge Ag Kurbelwelle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 08 5 August 2002 (2002-08-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013221763A1 (de) * 2013-10-25 2015-04-30 Bayerische Motoren Werke Aktiengesellschaft Kurbelwelle

Also Published As

Publication number Publication date
DE10202547C1 (de) 2003-07-03

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