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EP2049285B1 - Schwenkbarer rollenkäfig für ein rollwerkzeug - Google Patents

Schwenkbarer rollenkäfig für ein rollwerkzeug Download PDF

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Publication number
EP2049285B1
EP2049285B1 EP07803917A EP07803917A EP2049285B1 EP 2049285 B1 EP2049285 B1 EP 2049285B1 EP 07803917 A EP07803917 A EP 07803917A EP 07803917 A EP07803917 A EP 07803917A EP 2049285 B1 EP2049285 B1 EP 2049285B1
Authority
EP
European Patent Office
Prior art keywords
roller
supports
housing
bore
bores
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.)
Not-in-force
Application number
EP07803917A
Other languages
English (en)
French (fr)
Other versions
EP2049285A1 (de
Inventor
Lucia Garcia Aranda
Nicolas Massue
Gilles Yvenat
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP2049285A1 publication Critical patent/EP2049285A1/de
Application granted granted Critical
Publication of EP2049285B1 publication Critical patent/EP2049285B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/182—Rolling annular grooves
    • B21H7/185—Filet rolling, e.g. of crankshafts
    • 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
    • B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution
    • B24B39/045—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution the working tool being composed of a plurality of working rolls or balls

Definitions

  • the present invention generally relates to roller burnishing machines, in particular those used for the work hardening of the crankshafts of internal combustion engines.
  • It relates more particularly to a rolling roller casing roller housing having at least two supports vis-à-vis adapted to maintain in position retaining means housing a roller.
  • It also relates to a roller burnishing machine comprising an action tool housing.
  • crankshaft is a mechanical part intended to be constantly in motion when the engine is running, which is why it is dimensioned so as to be robust but also the lightest and least bulky possible.
  • crankshaft is one of the parts of the most mechanically stressed engine.
  • crankshaft is subjected to torsion and bending forces as well as significant vibrations.
  • it must withstand many cycles of engine operation.
  • crankshafts are made in one piece by forging or molding then they undergo machining operations, including work hardening by roller burnishing, intended to modify the structure of the material that composes them to make them more resistant.
  • the burnishing operation consists in imposing a permanent deformation on the surface of the material to improve its resistance to fatigue.
  • crank pins and trunnions consists in reinforcing the connection grooves between the arms and the crankshaft bearing surfaces (called crank pins and trunnions).
  • Known rolling machines have two rollers spaced apart from each other, and generally also inclined relative to each other, which each roll in a groove of the crankshaft exerting on the latter a large mechanical force which leads the hardening of this area.
  • the document FR 2 864 460 presents for example one of these machines which comprises an action tool provided with a housing having an inner housing in which are fixed supports a roller cage adapted to maintain two rollers in a selected orientation and a determined spacing , while leaving them free to rotate to roll on the throats.
  • the burnishing tool then adapts to a particular geometry of crankshaft bearings.
  • the present invention provides a roller cage that allows the rollers to rotate to fit the orientation of the grooves of the crankshaft to be machined.
  • roller cage as defined in the introduction, wherein the two supports are each pierced with at least one bore of common axis, and the holding means comprise two rods engaged freely. in said bores and between which is interposed the roller so that it is adapted to pivot about an axis transverse to said common axis.
  • the roller being held by rods which are themselves free to rotate about the axis in which they extend, it can, in contact with a groove of the crankshaft, naturally s' tilt to adapt its inclination to the geometry of the groove so as to smooth it uniformly over its entire section.
  • compression springs each interposed between one end of one of the rods and the bottom of the bore accommodating said rod.
  • each rod has two ends each shaped to hold the roller.
  • the rods of each support can be returned to their housing to double their life using successively their two ends to maintain the roller.
  • each rod comprises a cylindrical body engaged in the bore of the corresponding support, and a head having a diameter greater than the diameter of said cylindrical body, said head bearing on one side against the roller .
  • said head bears on the other side against the mouth of the bore of the corresponding support.
  • the invention also relates to a rolling machine as defined in the introduction, wherein it is provided that said housing comprises such a roller cage, the supports of the roller cage have means for fixing the housing.
  • the supports of the roller cage each comprise a groove and the housing comprises complementary ribs adapted to engage in said grooves to center the supports relative to the housing.
  • a roller burnishing machine 1 which comprises an upper tool, commonly known as an action tool 100, and a lower tool, commonly called a reaction tool 10.
  • This roller milling machine 1 is adapted to work a crankshaft 50 arranged between these machines. two tools.
  • the crankshaft 50 comprises along its length a series of pairs of arms 51 extending orthogonally to its axis W. As shown in FIG. figure 2 the pairs of arms 51 make it possible to connect staves 52, 53 to one another.
  • These bearing surfaces comprise journals 53 which are cylindrical and which have an axis coincident with the axis W of the crankshaft 50 and crank pins 52 which are cylindrical and which have an axis parallel and offset with respect to the axis W of the crankshaft 50.
  • each bearing 52, 53 has a cylindrical surface around an axis parallel to the axis W of the crankshaft.
  • the lateral faces vis-à-vis the two arms 51 connected to a pin 53 or to a pin 52 are planar and extend orthogonally to the axis W of the crankshaft 50.
  • the annular areas of connection between the surfaces cylindrical bearing surfaces 52, 53 and the two flat surfaces of the side faces of the arms 51 form grooves 54 to work hard.
  • the reaction tool 10 of the rolling machine 1 which is not strictly speaking the object of the present invention, is intended to support the crankshaft 50 to be machined. It comprises conventionally a housing 11 of generally parallelepiped shape with four side walls, including two front walls of axis normal to the axis W, which border a rectangular bottom wall. It is open on the front face and its two end walls each have a deep notch 12, generally in the shape of a triangle, which accommodates the corresponding span 52 or 53 of the crankshaft 50.
  • said bearing 52 or 53 of the crankshaft 50 is more particularly maintained by two reaction wheels 13 carried by two axes 14 which are housed inside the housing 11 and which extend between its two end walls.
  • the reaction wheels 13 are pivotally mounted on the axes 14 by means of needle bearings 15.
  • the action tool 100 comprises a parallelepipedal housing 101 separated longitudinally into two parts 110, 120. These two parts 110, 120 each have a front wall 111, 121 which is disposed orthogonal to the axis W of the crankshaft 50 and which is lined with returns 112, 122 extending orthogonally to said front wall.
  • the two end walls 111, 121 are positioned facing each other so that their respective returns 112, 122 are in contact with one another and together form the edge of the housing 101 of the action tool 100 .
  • each portion 110, 120 of the housing 101 is interrupted over a central portion of its length so that the edge of the housing 101 has an opening 106 disposed above said bearing surface 52 or 53 of the crankshaft 50.
  • the returns 112, 122 of the two parts of the housing 101 are pierced with coaxial bores 117, 127 of axes orthogonal to the end walls 111, 121 and arranged regularly along the periphery of the housing 101.
  • the bores 127 of one of the 120 parts of the housing are further tapped. These different bores 117, 127 are adapted to receive assembly screws 103 of the two parts 110, 120 of the housing together.
  • the housing 101 is more particularly positioned relative to the crankshaft 50 so that its lower returns extend in length orthogonal to the axis W of the crankshaft, just above the latter.
  • the end walls 111, 121 of the two parts 110, 120 of the housing 101 each have a central opening 113, 123 circular in which is slid a same axis 180.
  • a needle sleeve 105 is interposed between the axis 180 and a roller wheel 140 , allowing the latter to rotate freely about the axis 180.
  • the roller wheel 140 has, at mid-height of its outer cylindrical face, a central rib 141 of rectangular section which extends over its entire periphery.
  • the lateral faces of this central rib 141 are connected to the outer cylindrical face of the roller wheel 140 by rounded leaves 142.
  • the action tool 100 further comprises two rollers 150 held on the housing 101 of the action tool 100 by means of two roller stands 160.
  • Each roller 150 has a shape of thin disc and is disposed below the opening 106, so as to be in contact, on one side, with one of the rounded leaves 142 of the roller wheel 140, and, on the other, one of the grooves 54 of the crankshaft 50.
  • the rollers can thus exert a significant burnishing force on the grooves 54 of the crankshaft 50 to work harden.
  • roller cages 160 of the tool 100 of the rolling machine 1 comprises two identical supports 170 fixed on the same part 110, 120 of the housing 101, on either side of the opening 106, and holding means 161 of the two rollers 150.
  • the supports 170 each have a parallelepipedal shape of rectangular section. They each extend according to the length of one of the lower returns 112, 122. One of their ends is supported on an end upright 107 projecting from the ends of the lower returns of the two parts 110, 120 of the housing 101. The other end is disposed at the opening 106 of the edge of the housing 101 and is pierced with a non-through cylindrical bore 171.
  • the bores 171 of the two supports 170 which are fixed to the same part of the housing 101, on either side of the opening 106, have a common axis V.
  • each support 170 comprises along its length a groove 172 made recessed on its upper lateral face.
  • each lower return 112, 122 comprises over its entire length a rib intended to cooperate with the grooves 172 of the supports 170 to very precisely position the latter on the housing 101.
  • the supports 170 are each further pierced by a through hole 173 accommodating a fixing screw whose head bears against the lower side face of the support and whose body is screwed into a corresponding threaded bore provided in the lower return of the one of the parts of the housing 101.
  • the supports 170 comprise notches 174 hollowed out in one of their lateral faces to allow the roller wheel 140 to pass through.
  • each roller 150 comprise two identical rods 161 each having a cylindrical body 162 which has a length less than the depth of the bores 171 of the supports 170 and which is freely engaged in one of these bores 171.
  • the rods 161 also have at one of their two ends a cylindrical head 163 of diameter greater than the diameter of the cylindrical bodies 162.
  • the end face of the head 163 of each rod 161 has a recessed shape complementary to the shape of a portion of the rollers 150.
  • Each roller 150 is interposed between the end faces of the heads 163 of the two rods which are engaged in the bores 171 of the supports 170 fixed to the same return 112, 122.
  • the length of the cylindrical bodies 162 being less than the depth of the bores 171
  • the heads 163 of the rods 161 bear, on one side, against the mouth of the bore 171 of one of the supports 170, and, the other, against the corresponding roller 150.
  • the length of the head 163 of each rod 161 is precisely adjusted so that the rods 161 properly hold the rollers 150, without exerting too much force, so as not to block their rotation about their axis of revolution.
  • each roller 150 can also pivot about the common axis V when the rods 161 pivot in their bores 171.
  • the inclination of the rollers 150 can thus change to adapt to the geometry of the grooves 54 of the crankshaft 50.
  • each rod may have a head of diameter equal to the diameter of its cylindrical body, and two identical ends having a shape complementary to the shape of a portion of the rollers.
  • a compression spring is interposed between the free end of the cylindrical body of each rod and the bottom wall of the corresponding bore.
  • the compression springs make it possible to hold the two rods of each roller cage in contact with the roller so that the latter can pivot about its axis of revolution which is arranged perpendicularly to the common axis.
  • each of the rods 161 and each of the supports 170 of the rolling machine 1 is made in one piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Rolling Contact Bearings (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Turning (AREA)
  • Gripping On Spindles (AREA)
  • Braking Arrangements (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Claims (10)

  1. Rollenkäfig (160) eines Gehäuses (101) eines Rollierwerkzeugs (1), der mindestens zwei einander gegenüber liegende Träger (170) aufweist, die geeignet sind, um Halteeinrichtungen (161) in Stellung zu halten, die eine Rolle (150) beherbergen, dadurch gekennzeichnet, dass in die zwei Träger (170) je mindestens eine Bohrung (171) mit gemeinsamer Achse (V) gebohrt ist, und die Halteeinrichtungen zwei Stangen (161) aufweisen, die frei in die Bohrungen (171) eingeführt sind und zwischen denen die Rolle (150) so eingefügt ist, dass sie um eine Querachse zur gemeinsamen Achse (V) schwenken kann.
  2. Rollenkäfig (160) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass er zwei Druckfedern aufweist, die je zwischen ein Ende einer der Stangen (161) und den Boden der die Stange (161) aufnehmenden Bohrung (171) eingefügt sind.
  3. Rollenkäfig (160) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede Stange (161) zwei Enden aufweist, die je angepasst sind, um die Rolle (150) zu halten.
  4. Rollenkäfig (160) nach Anspruch 1, dadurch gekennzeichnet, dass jede Stange (161) einen zylindrischen Körper (162), der in die Bohrung (171) des entsprechenden Trägers (170) eingeführt ist, und einen Kopf (163) aufweist, der einen größeren Durchmesser als der zylindrische Körper (162) hat, wobei der Kopf (163) sich auf einer Seite gegen die Rolle (150) auflegt.
  5. Rollenkäfig (160) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Kopf (163) sich auf der anderen Seite gegen die Mündung der Bohrung (171) des entsprechenden Trägers (170) auflegt.
  6. Rollenkäfig (160) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede Stange (161) ein Ende aufweist, das mit der Rolle (150) zusammenwirkt und das eine zur Form eines Teils der Rolle (150) komplementäre Form hat.
  7. Rollenkäfig (160) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Stangen (161) geeignet sind, um innerhalb der Bohrungen (171) der Träger (170) um die gemeinsame Achse (V) zu drehen.
  8. Rollenkäfig (160) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede der Stangen (161) und jeder der Träger (170) aus einem Stück hergestellt ist.
  9. Rolliermaschine (1), die ein Gehäuse (101) eines agierenden Werkzeugs (100) aufweist, dadurch gekennzeichnet, dass das Gehäuse (101) einen Rollenkäfig (160) nach einem der vorhergehenden Ansprüche aufweist, bei dem die Träger (170) Einrichtungen zur Befestigung am Gehäuse (101) aufweisen.
  10. Rolliermaschine (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Träger (170) des Rollenkäfigs (160) je eine Rille (172) aufweisen und das Gehäuse (101) komplementäre Rippen aufweist, die geeignet sind, um sich in die Rillen (172) einzufügen, um die Träger (170) bezüglich des Gehäuses (101) zu zentrieren.
EP07803917A 2006-07-31 2007-06-21 Schwenkbarer rollenkäfig für ein rollwerkzeug Not-in-force EP2049285B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0606987A FR2904249B1 (fr) 2006-07-31 2006-07-31 Cage a galet pivotante pour outil de galetage
PCT/FR2007/051492 WO2008015348A1 (fr) 2006-07-31 2007-06-21 Cage a galet pivotante pour outil de galetage

Publications (2)

Publication Number Publication Date
EP2049285A1 EP2049285A1 (de) 2009-04-22
EP2049285B1 true EP2049285B1 (de) 2009-12-16

Family

ID=37758881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803917A Not-in-force EP2049285B1 (de) 2006-07-31 2007-06-21 Schwenkbarer rollenkäfig für ein rollwerkzeug

Country Status (5)

Country Link
EP (1) EP2049285B1 (de)
AT (1) ATE451983T1 (de)
DE (1) DE602007003850D1 (de)
FR (1) FR2904249B1 (de)
WO (1) WO2008015348A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006779U1 (de) * 2013-07-27 2014-10-29 Hegenscheidt-Mfd Gmbh & Co. Kg Walzwerkzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2609787C3 (de) * 1976-03-10 1978-09-07 Wilhelm Hegenscheidt, Gmbh, 5140 Erkelenz Vorrichtung zum Walzen von Hohlkehlen
DE10040146A1 (de) * 2000-08-17 2002-03-07 Hegenscheidt Mfd Gmbh & Co Kg Werkzeug zum Festwalzen der Einstiche an Lager- oder Hubzapfen von Kurbelwellen
FR2864460B1 (fr) * 2003-12-31 2006-04-07 Renault Sas Machine de galetage, notamment pour l'ecrouissage d'un vilebrequin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006779U1 (de) * 2013-07-27 2014-10-29 Hegenscheidt-Mfd Gmbh & Co. Kg Walzwerkzeug

Also Published As

Publication number Publication date
ATE451983T1 (de) 2010-01-15
EP2049285A1 (de) 2009-04-22
DE602007003850D1 (de) 2010-01-28
FR2904249A1 (fr) 2008-02-01
WO2008015348A1 (fr) 2008-02-07
FR2904249B1 (fr) 2008-09-12

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