EP2498932B1 - Outil de laminage, dispositif et méthode de fabrication d'une denture bombée et roue dentée - Google Patents

Outil de laminage, dispositif et méthode de fabrication d'une denture bombée et roue dentée Download PDF

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Publication number
EP2498932B1
EP2498932B1 EP10798451.0A EP10798451A EP2498932B1 EP 2498932 B1 EP2498932 B1 EP 2498932B1 EP 10798451 A EP10798451 A EP 10798451A EP 2498932 B1 EP2498932 B1 EP 2498932B1
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EP
European Patent Office
Prior art keywords
tool
rolling
gear
toothing
region
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.)
Active
Application number
EP10798451.0A
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German (de)
English (en)
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EP2498932A2 (fr
Inventor
Horst Rössler
Jürgen BUCHINGER
Robert Spitaler
Christian Sandner
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.)
Miba Sinter Austria GmbH
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Miba Sinter Austria GmbH
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Publication date
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Publication of EP2498932A2 publication Critical patent/EP2498932A2/fr
Application granted granted Critical
Publication of EP2498932B1 publication Critical patent/EP2498932B1/fr
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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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/022—Finishing gear teeth with cylindrical outline, e.g. burnishing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49462—Gear making
    • Y10T29/49467—Gear shaping
    • Y10T29/49471—Roll forming

Definitions

  • the invention relates to a rolling tool for producing a spherical toothing on a gear by transverse rollers, in particular for at least partially compressing the teeth of the gear, with a tool body having radially outwardly projecting tool teeth for meshing engagement in the toothing of the gear to be rolled, wherein the tool teeth in the area of the tooth flanks are executed in the axial direction at least partially hollow ball.
  • a method for crowning the toothing of gears is known, according to which the axis of the workpiece with respect to the rolling tool on the one hand performs a rotational movement about the rolling axis and on the other hand a wobbling movement of the rolling axis along the path of a cone whose tip is in the rolling axis, said Circulating speed of the workpiece to the rolling axis and the speed of the additional wobbling differ.
  • the workpiece is clamped to carry out the process between two grain tips, which are eccentric with respect to the rolling axis on the shells of two cones, the top of which lies in the rolling axis.
  • the pivotally mounted rolling head can be swung out with the value of the desired crown in one or more directions from its zero position on the rolling axis. It is thus possible a radial crowning of the toothing or a longitudinal crowning, that is, axial crowning, the teeth to produce.
  • the disadvantage of this is that an additional wobbling motion is performed, whereby precision gears are difficult or impossible to produce.
  • a ratchet-shaped tool for cold rolling a crowning gear is known, with a tool carrier and a tool insert mounted thereon.
  • the latter has a toothing produced by linear grinding and arching of the tool insert, the tooth shape of which is complementary to the tooth form of the crowning toothing.
  • the preparation of the tool insert can be done in such a way that it generates on a flat, flat plate-shaped insert blank with flat major surfaces by linear grinding a toothing with straight teeth and then attached to the rack so that the desired for working with the tool , Complementary to a crowned tooth shape of the teeth results.
  • the WO 2008/116243 A1 which forms the basis for the preamble of claim 1, describes a method for machining a toothing on an outer circumference or an inner circumference of a workpiece made of pressed and sintered powder metal, with a rolling carried out at the toothing rolling with two rotatable shaping rollers, one in the toothing having the workpiece engaging toothed form, wherein the two Formwalzmann are mutually at least approximately constant center distance between their Formwalzradachsen rotatably arranged in a common support frame.
  • the WO 2008/116243 A1 describes a device for carrying out the method.
  • the JP 2008-049384 A describes a method of forming a gear with teeth having a crown.
  • a device for non-cutting machining of gears by rolling on a gear-like or rack-like tool wherein the tool relative to the workpiece performs a longitudinal feed, the direction lies in a plane which is parallel to the two rolling circles of tool and workpiece tangent through the contact point of the rolling circles extending plane, wherein the occurring smallest axial distance between the tool and the workpiece is dimensioned so that a tool and workpiece radially directed pressure component occurs, whereby a relatively small force is spent for the drive of the feed, while the radial force in is essentially absorbed by support elements for the tool and workpiece.
  • this is achieved by the rolling tool mentioned above, in which a plurality of hollow-balled areas are arranged one behind the other on the tooth flanks in the axial direction, as well as by the method in which the compaction is carried out with rolling tools according to the invention.
  • the advantage is achieved that relatively easy arbitrary waveforms can be generated by the rollers.
  • the shape of the crown can also fulfill polynomial functions in addition to the forms mentioned above. It is thus possible, for example, to perform the crowning progressively, that is to say that the curvature to the edge of the toothing, that is to say to the end faces of the toothed wheels, is increased.
  • This has the particular advantage that at low load already almost the entire gear width has contact with the mating gear. If the load is subsequently increased, the progressive shape contributes insignificantly to the increase in the contact surface, but very efficiently prevents the edge of the toothed wheel from becoming the contact surface, thus creating a so-called edge support would. Since one edge is a strong non-linearity, the avoidance of edge beams causes a favorable noise behavior of the gear.
  • the hollow-bulbous region may have at least two mutually different radii of curvature in the radial direction in order to obtain a better contact pattern of the toothed wheel. It is advantageous if a web is formed between two adjacently arranged regions. It can thus improve the directional stability when rolling gears of multiple gears.
  • At least two of the plurality of hollow-crowned regions may have a mutually different, concave curvature in the axial direction, as a result of which the width crowning of the toothing of the toothed wheel can achieve greater accuracy with respect to its geometry, since a smaller deformation dimension is made possible by processing in several individual steps.
  • the sequence of different concave curved, hollow-spherical areas is designed such that the radius of curvature of the hollow crowning increases between the individual processing steps, so that in the successive areas of material in the edge region, ie in the edge region, ie the transition between the end face and the toothing of the gear, can be spent, whereby the strength can be increased in this edge region.
  • At least two of the plurality of hollow-crowned regions may differ in diameter at least in the apex region of the concave curvature. It is thus in turn the compression process in itself better adjustable.
  • the diameter variation is formed such that the diameter of the rolling tool in the apex region of the hollow-crowned regions increases from one region to the next region, by which the densities in this region can be increased.
  • the diameter decreases from one area to the next area,
  • the design of the rolling tool with a separate compression area ensures that tool production can be simplified. In addition, the rolling time is practically not extended or insignificantly. Another advantage is that if the compacting range of the tool breaks, the more expensive rolling tool for producing the crowning can be used further. The latter is more expensive, in particular, since these tools are usually produced by grinding on CNC profile grinding machines.
  • This tool design is also suitable for producing a width crowning of the tooth flanks on helical gears by the gear to be produced is held axially immovable.
  • the two regions are separated by a third region having a smaller diameter than the two adjoining regions.
  • This intermediate area supports the "threading" during the transfer of the gear from the compaction tool in the region of the forming tool, whereby this transfer smooth and gear-saving, that is gentle for the toothing to be produced, can be done.
  • the compression region is multi-track and has a width in the axial direction, which is a multiple of the width of the gear to be compressed in the same direction. It can thus at the same time a plurality of gears, that is, the teeth of the gears are compressed, so that the degree of utilization of the area for the shaping of the Boothnballmaschine can be increased, which is particularly advantageous because this shape allows a shorter cycle time compared to the compression process.
  • Fig. 1 shows a detail of a device 1 for rolling the teeth of a gear as known from the prior art.
  • This device 1 comprises two gear-like running rolling tools 2, which are rotatably held in a respective holding device 3, in particular rolling carriage.
  • These holding devices 3 are each arranged on their own carriage spindles 4.
  • the rolling tools 2, that is, their teeth are in meshing engagement with the toothing of a toothed wheel to be produced 5.
  • the gear 5 itself is preferably formed of a sintered material by a sintering process and already has a rough contour of the toothing.
  • both the rolling tools 2 and the gear 5 rotate, for which purpose at least one of the rolling tools 2 can be driven. But it is also possible that both rolling tools 2 are driven, or there is the possibility that the second rolling tool 2 is a follower, and the drive is transmitted from the first rolling tool 2 via the gear 5 to this rolling tool 2. On the other hand, there is the possibility that gear 5 itself is driven and the two rolling tools 2 are only so-called follower.
  • Fig. 2 one of the rolling tools 2 is shown in side view.
  • This rolling tool 2 consists of a tool body 6, the radially outwardly projecting tool teeth 7 for the meshing engagement in the toothing of the gear to be rolled 5 (FIG. Fig. 1 ) having.
  • a cross section through a tool tooth 7 according to the section III - III in Fig. 2 shows, this tool tooth 7 hollow ball executed with an inwardly facing, concave curvature 8.
  • this curvature 8 is complementary to the convex curvature of the produced crown of the tooth flanks of the toothing of the gear 5 to be produced.
  • This hollow crowning preferably extends from a tooth root 9 into a tooth head 10 of the tool toothing of the rolling tool 2 (FIG. Fig. 2 ).
  • the hollow crowning that is, the curvature 8 may have very different geometrical configurations. In the simplest case, this is how in Fig. 3 shown, circular arc-shaped. But there is also the possibility that this curvature 8 is composed of different areas, for example areas with different radii of curvature. These areas with different radii of curvature can be interrupted by rectilinear areas.
  • the hollow crowning with different radii of curvature in their curvature profile in order to be able to produce toothed wheels 5 which have a better contact pattern or it is therefore also possible to be able to compensate for inaccuracies in the tooth flanks.
  • the curvature in the center region of the tooth flanks may have a greater radius of curvature than in at least one of the two edge regions of the tooth flanks, or vice versa.
  • Fig. 4 shows a section through a tool tooth 7 of a variant of a rolling tool according to the invention 2.
  • This tool tooth 7 is divided into three areas 11 to 13, whereby three tracks are formed. It is thus possible three gears 5 ( Fig. 1 ) at the same time a rolling treatment for producing a crown in the tooth flank area to edit.
  • Fig. 5 which also shows a tooth 7 in cross-section and top view of a variant of the rolling tool 2 shows that these regions 11, 12 are formed differently on the rolling tool 2.
  • the region 11 in a crown region 14 of the bend 8 may have a smaller diameter 15 than a crown region 16, which in this case has a diameter 17 which is greater than the diameter 15.
  • the compression and / or formation of the crown in the region of the tooth flanks of the toothed wheel 5 (FIG. Fig. 1 ) to suspend different, consecutive processing steps, so for example as in Fig. 5 shown to carry out a two-stage compaction, in a first compaction step, the gear 5 is cross-rolled in the region 11 and in a second compaction step with further compression in the area 12th
  • the two regions 11, 12 differ in terms of their curvature 8, that is, the radius of curvature, wherein in the region 11, the curvature 8 has a smaller radius than a curvature 18 of the region 12.
  • the two bends 8, 18 are not circular-arc-shaped as shown, but that they have other geometric characteristics, such as different radii of curvature within at least one of the bends 8, 18, etc., as described above.
  • the areas 11 to 13 may be separated from each other by webs 19.
  • Fig. 6 shows a variant of the rolling tool 2, wherein this rolling tool is designed in three parts, with a first part 20, a middle, second part 21 and a third part 22, which connects to the second part 21.
  • the part 20 is formed as a compression region 23, with the exclusive compression of the gear 5 (FIG. Fig. 1 ) in the region of the toothing, that is the tooth roots and / or tooth flanks and / or tooth heads takes place.
  • the middle region which has a smaller diameter compared to the parts 20 and 22, the transfer of the meshing gear 5 during the operation of the device 1 (FIG. Fig. 1 ), ie with rolling tools 2 running, is made easier by the compression area 23 of the part 20 on the part 22.
  • the part 22 in turn forms a region 24 of the rolling tool 2, in which ultimately the width crowning of the teeth of the toothing of the toothed wheel 5 (FIG. Fig. 1 ) will be produced.
  • this middle part 21 it is possible to dispense with this middle part 21, so that therefore the compression region 23 directly adjoins the region 24 for producing the crowning. All parts, ie the parts 20 to 22 or 20 and 22, radially outwardly projecting on the tool body 6, the tool teeth with the tool teeth. 7
  • the compression region 23 also has more than one track, so that at the same time a plurality of gears 5 (FIG. Fig. 1 ) can be subjected to a compression process of the toothing.
  • FIGS. 7 and 8 show a first embodiment of the device 1 for rolling the teeth and produce a width crowning of the gear 5.
  • the gear 5 remains unchanged with respect to its axis.
  • the rolling tools 2 are mitverschwenkt with the rolling spindles 24, as is made Fig. 8 is apparent. It can thus be achieved over the pivoting range, a different curvature of the width crowning of the toothing of the gear 5.
  • the pivoting range can be, for example, up to 12 °, in particular between 0 ° and 9 °.
  • FIGS. 9 and 10 a variant of the device 1, in which the holding devices 3 are formed in several parts and rolling carriage 26 which in the holding devices 3 according to arrows 27 from the zero position in a pivoted-in a horizontal plane position ( Fig. 10 ) are pivotable.
  • the rolling spindles 24 themselves are mitverschwenkt in this plane with respect to the axis of the gear 5, which remains unchanged.
  • a corresponding width crowning of the teeth of the toothing of the gear 5 can be achieved, wherein the extent of this width crowning over the adjustment angle of the rolling carriage 26 with respect to the zero position ( Fig. 9 ) can be adjusted.
  • the two rolling carriages 26 have convex surfaces on their rear side remote from the toothed wheel 5, which surfaces can slide on concave surfaces of the tool holder of the holding device 3 for pivoting.
  • a corresponding spindle drive or the like can of course also be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Gear Processing (AREA)

Claims (9)

  1. Outil de laminage (2) pour réaliser une denture bombée sur un pignon (5) par laminage transversal, notamment pour densifier la denture du pignon (5) au moins dans certaines zones, comprenant un corps d'outil (6) comportant des dents d'outil (7) en saillie radialement vers l'extérieur pour un engrenage dans la denture du pignon (5) à laminer, les dents d'outil (7) étant formées creuses dans la zone des flancs de dent dans la direction radiale au moins dans des parties de zone,
    caractérisé en ce que plusieurs zones bombées (11 à 13) sont disposées sur les flancs de dent dans la direction axiale les unes derrière les autres.
  2. Outil de laminage (2) selon la revendication 1, caractérisé en ce que la zone creuse comporte dans la direction axiale au moins deux rayons de courbure différents l'un de l'autre.
  3. Outil de laminage (2) selon la revendication 1 ou 2, caractérisé en ce qu'une entretoise (19) est formée entre deux zones avoisinantes (11 à 13).
  4. Outil de laminage (2) selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins deux des zones creuses (11 à 13) présentent une courbure concave (8, 18) différente l'une de l'autre dans la direction axiale.
  5. Outil de laminage (2) selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'au moins deux des zones creuses (11 à 13) présentent dans la zone de sommet (14, 16) de la courbure concave (8, 18) un diamètre différent (15, 17).
  6. Outil de laminage (2) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le corps d'outil (6) comporte dans la direction axiale une zone de densification (23) et une zone (24), séparée de la première, pour réaliser la forme bombée sur la denture du pignon (5).
  7. Outil de laminage (2) selon la revendication 6, caractérisé en ce que la zone de densification (23) et la zone (24) séparée d'elle pour la réalisation de la forme bombée sur la denture du pignon sont séparées l'une de l'autre par une troisième zone ayant un diamètre inférieur à ceux des deux zones adjacentes (23, 24).
  8. Outil de laminage (2) selon la revendication 6 ou 7, caractérisé en ce que la zone de densification (23) est formée avec plusieurs voies et présente une largeur dans la direction axiale qui est un multiple de la largeur, dans la même direction, de la denture à densifier du pignon (5).
  9. Procédé pour densifier la denture d'un pignon (5) au moins dans certaines zones, par laminage transversal avec engrènement de dents d'outil (7) d'une denture d'outil de deux outils de laminage (2), caractérisé en ce que la densification est effectuée à l'aide d'outils de laminage (2) selon l'une quelconque des revendications 1 à 8.
EP10798451.0A 2009-11-10 2010-11-09 Outil de laminage, dispositif et méthode de fabrication d'une denture bombée et roue dentée Active EP2498932B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1776/2009A AT508990B1 (de) 2009-11-10 2009-11-10 Walzwerkzeug
PCT/AT2010/000431 WO2011057311A2 (fr) 2009-11-10 2010-11-09 Outil de laminage

Publications (2)

Publication Number Publication Date
EP2498932A2 EP2498932A2 (fr) 2012-09-19
EP2498932B1 true EP2498932B1 (fr) 2015-07-15

Family

ID=43645917

Family Applications (1)

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EP10798451.0A Active EP2498932B1 (fr) 2009-11-10 2010-11-09 Outil de laminage, dispositif et méthode de fabrication d'une denture bombée et roue dentée

Country Status (7)

Country Link
US (1) US9144837B2 (fr)
EP (1) EP2498932B1 (fr)
JP (1) JP2013510001A (fr)
CN (1) CN102753282B (fr)
AT (1) AT508990B1 (fr)
CA (1) CA2783979A1 (fr)
WO (1) WO2011057311A2 (fr)

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US9610629B2 (en) 2013-07-23 2017-04-04 Nissei Co., Ltd. Rolling machine and method of rolling gear using the rolling machine
AT514778B1 (de) 2013-09-05 2016-02-15 Miba Sinter Austria Gmbh Kalibrierwerkzeug
EP3082428A4 (fr) 2013-12-09 2017-08-02 Respira Therapeutics, Inc. Formulations en poudre d'inhibiteur pde5 et procédés y associés
AT516779B1 (de) 2015-01-23 2017-04-15 Miba Sinter Austria Gmbh Verfahren zur Herstellung einer Balligkeit auf einem Sinterbauteil
CN109629222B (zh) * 2019-02-23 2024-01-23 马金兰 一种生产二节折褶苗族裙摆的设备
CN113305581B (zh) * 2021-06-09 2022-04-29 南京二机齿轮机床有限公司 一种齿轮加工自动生产线

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Also Published As

Publication number Publication date
EP2498932A2 (fr) 2012-09-19
JP2013510001A (ja) 2013-03-21
CA2783979A1 (fr) 2011-05-19
CN102753282B (zh) 2014-12-24
AT508990B1 (de) 2012-04-15
WO2011057311A8 (fr) 2012-08-16
AT508990A1 (de) 2011-05-15
CN102753282A (zh) 2012-10-24
US20120297623A1 (en) 2012-11-29
WO2011057311A2 (fr) 2011-05-19
WO2011057311A3 (fr) 2011-07-14
US9144837B2 (en) 2015-09-29

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