EP1181132B1 - Degrossissage et finissage a la meule d'un vilebrequin a l'aide d'un seul dispositif de fixation - Google Patents

Degrossissage et finissage a la meule d'un vilebrequin a l'aide d'un seul dispositif de fixation Download PDF

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Publication number
EP1181132B1
EP1181132B1 EP00927018A EP00927018A EP1181132B1 EP 1181132 B1 EP1181132 B1 EP 1181132B1 EP 00927018 A EP00927018 A EP 00927018A EP 00927018 A EP00927018 A EP 00927018A EP 1181132 B1 EP1181132 B1 EP 1181132B1
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EP
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Prior art keywords
grinding
crankshaft
bearings
sec
finish
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Expired - Lifetime
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EP00927018A
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German (de)
English (en)
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EP1181132A1 (fr
Inventor
Erwin Junker
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Erwin Junker Maschinenfabrik GmbH
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Erwin Junker Maschinenfabrik GmbH
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    • 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 present invention relates to a method for grinding a centric clamped crankshaft.
  • crankshafts takes place in known methods in several Stages on different machines in several operations on special equipped grinding machines. Another method as well as a corresponding device are known from DE 43 27 807 A. There will be one Crankshaft with axial tension between receiving tips of a Clamped workpiece spindle and tailstock of a grinding machine. In this All bearings, stroke bearings, flanges, pins and end faces are clamped Finished crankshaft. At least two are used correspondingly contoured grinding wheels.
  • crankshaft in several processing stages manufactured on several grinding machines or in one set is finished.
  • the object of the invention is to provide a method for grinding To develop crankshafts, with which dimensional, shape and Machining tolerances of the crankshaft are improved and the Processing time is reduced.
  • This task comes with a method for grinding a centric clamped crankshaft with the features of claim 1.
  • the inventive method for grinding a centric clamped Crankshaft provides that their stroke bearings and main bearings in one setting be ground so that initially sanded at least the main bearing and then the stroke bearings finished and then the main bearings finished become.
  • crankshaft for several processing stages in one Clamping from pre-grinding to subsequent finish grinding Leave finished measure.
  • this saves time, the otherwise for retooling the machine or for loading and unloading the Crankshaft would be needed.
  • it succeeds through the claimed procedure of grinding that during grinding of the Warehouse liberated stresses in the material are compensated so far that After processing, a delay of the crankshaft is eliminated.
  • crankshafts first undergo soft machining such as turning, drilling and milling are subjected to, and then cured by heat treatment are in the crankshafts tensions that are released during grinding.
  • This free Expected stresses cause the workpiece to drag during grinding deforms or warps
  • the inventive order of processing steps the roughing and finishing of initially at least the main bearing and then the finish grinding of the rod bearings and then the finish grinding of the main bearings achieved One Controlled Influencing the Freeing of More Workpiece-Inherent Tensions.
  • the distortion of the crankshaft occurring during pre-grinding of the main bearings is lifted by the finish grinding so far that the required lower Tolerances of the dimensional accuracy of the main bearings can be achieved.
  • a further development provides that in addition to the main bearings and the lift bearings be pre-ground.
  • the pre-grinding of the stroke bearing takes place after pre-grinding the main bearings. Because bearings of different Crankshafts usually have different shapes, such as with lateral radii or punctures, it succeeds by pre-grinding the Crankshaft, as shown above, from the released voltages in the Crankshaft resulting distortion on the finished product to avoid. When vorwie Finished grinding while the plan pages can be mitgeschliffen without after finish grinding the desired tolerance values are exceeded.
  • crankshaft grinding machine As a particularly preferred application of the method and the crankshaft grinding machine has become the manufacture of crankshafts made of tempered steel proved. In a previous heat treatment, this one especially high risk that due to during the grinding process released stresses in the workpiece, the crankshaft warps. By the claimed approach is this distortion in finish grinding again eliminated.
  • An embodiment of the method provides that the pre-grinding and the Finish grinding with a single grinding wheel. Another procedure provides that the pre-grinding and finish grinding with one each Grinding wheel takes place. It allows the use of a grinding wheel for pre-grinding and a grinding wheel for finish grinding, different Grinding wheel specifications and dimensions for each to be able to exploit different processing. Another embodiment of the method provides that the main bearing and the lift bearings with one Grinding wheel pre-sanded and finished. Lift bearings like main bearing can have different machining tolerances. By a corresponding assignment of a grinding wheel to a type to be processed From bearings of the crankshaft it is possible to have an appropriate vote of used to make grinding wheel specification.
  • CBN grinding wheel with a Cutting speed between 40 m / sec and 140 m / sec, preferably between 80 m / sec to 120 m / sec and with galvanic CBN disks between 80 m / sec and 200 m / sec, preferably between 100 m / sec to 140 m / sec.
  • corundum grinding wheels in a range of preferably 35 m / sec to 100 m / sec, in particular 45 m / sec to 70 m / sec deploy. These values may vary slightly upwards as well as downwards, For example, depending on the dimensions of the crankshaft and the on these geometries to be machined, on the exact composition of the Grinding wheel, of the required surface quality etc.
  • crankshafts are in one piece with high Accuracy requirements produced by the above method, as they For example, for car and truck engines with a length of over 300 Millimeters are needed.
  • the above method is also suitable for the manufacture of crankshafts for example small engines, the one Length of 100 millimeters and more.
  • crankshafts made of cast iron or high-alloy steel achievable. This is especially true at a length of at least 100 millimeters, in particular at least 300 Millimeter of the crankshaft due to the achieved tolerance grades detectable.
  • Fig. 1 shows an illustration of a clamped crankshaft 1. This is in a chuck 2 clamped, which on a workpiece spindle 3 of a not shown workpiece flange is flanged. Downtown of the chuck 2 is a first tip 4, on which the crankshaft. 1 is centered. Radial entrainment of the crankshaft 1 takes place by Clamping jaws 5 of the chuck 2, which on an outer circumference of a Tighten flange 6 of crankshaft 1. Another shaft end of the crankshaft 1 is supported by a second tip 7 of a tailstock 9. The second tip 7 of the tailstock 9 is placed on an axially displaceable sleeve 8.
  • Tailstock 9 can also, as shown here, but not with a second tip 7 with another chuck as on the workpiece headstock be equipped.
  • the jaws of this chuck then clamp on one Spigot end 21 of the crankshaft 1.
  • the crankshaft 1 can under slight pressure, be depressurized or clamped under axial tension.
  • a drive of Crankshaft 1 takes place according to the embodiment shown in Fig. 1 in the way that the crankshaft 1 about a main bearing 11 centrically revolving through the Workpiece spindle 3 is driven with the chuck 2.
  • the drive is as CNC axis executed, cf. Arrow C1.
  • the tailstock 9 instead of only with a second tip 7 with a driven Tailstock quill (CNC axis C2) be equipped.
  • the grinding spindle 30 is shown with a grinding wheel 31.
  • the grinding spindle 30 is from a grinding spindle housing, not shown taken in the direction of the axis X by means of a CNC axis movable is.
  • the workpiece headstock with the chuck 2 and the tailstock 9 are mounted on a grinding table, not shown, in the direction of a Z-axis is movable.
  • the crankshaft 1 is clamped in such a way that their Central axis 13 exactly with the center axes of the workpiece spindle 3 and the Tailstock quill 8 is aligned.
  • a support of the crankshaft 1 takes place for example, by means of a steady rest 10, which is constructed on the grinding table.
  • the bezel 10 can in the axial direction of a predetermined main bearing 11th be set.
  • the grinding of the crankshaft 1 is different Variants of grinding spindle assemblies executable so that different Crankshaft grinding machine construction variants are possible. Some variants will be apparent from the following Fig. 6 to 8.
  • the grinding wheel 31 engages the crankshaft 1.
  • high-alloyed steel for example, with a corresponding proportion of Chromium, molybdenum and vanadium or a corresponding casting quality, For example, GGG 60/70/80, there is a risk that due to the processing a delay occurs on the crankshaft 1 over its length. There are Deviations of up to 0.4 mm have been measured. Accordingly, it is have not been possible with high quality materials used in machining are extremely susceptible to delay, the required high quality terms to comply with predetermined tolerances.
  • the fact that now at least the Main bearing before and then ground the rod bearings and the main bearings are, when working through the released voltages are so eliminable that eliminates the distortion occurring in the subsequent operation is and, for example, even runout tolerances of 0.01 mm and less the main lagem can be met.
  • the concentricity tolerance is included measured between the first and last main bearings. Provided Only two main bearings are present, the concentricity tolerance determined by measuring between the two peaks. Compliance with a maximum concentricity tolerance is therefore particularly important because of the Storage in the engine there are only small tolerances allowed. Tolerances on However, lift bearings may be larger in terms of lift height fail because these in the engine only the top dead center and the determine bottom dead center.
  • crankshaft when selecting the material of the crankshaft is further noted that among other things, as well as from the hardening process of the crankshaft depends on whether the roughing and finishing of the lift bearings in a single Work step done. It should be noted that, especially in casting lower voltages and resulting distortion occur.
  • Fig. 2 shows a main bearing 11 with lateral grooves according to a section Y from Fig. 1. It is shown with reference to the main bearing 11 of the crankshaft 1, such as with the procedure or the crankshaft grinding machine so far already known contours can be achieved. The lateral punctures stir from the cutting pre-processing ago. A Rohhdies the crankshaft 1 is replaced by a dotted line 203 shown.
  • pre-grinding with a grinding wheel 104, which has an abrasive coating 205 is on a Vonn beau 202 pre-sanded.
  • the pre-dimension 202 is larger in diameter than the one to be achieved Finished size. This is drawn with a contour 201 for the main bearing 11.
  • the two planets 206 of the main bearing 11 of the crankshaft 1 are at this application example not mitgeschliffen.
  • Fig. 3 shows a stroke bearing 12 with lateral radii and ground flanks according to section W of Fig. 1.
  • the stroke bearing 12 has lateral radii, the as well as a low plan shoulder be pre-ground.
  • the radius is no longer mitgeschliffen completely, because he is not in the bearing shell of the motor housing with built-crankshaft 1 is applied.
  • the bearings shown in FIGS. 2 and 3 can also be reversed for the same Lifting bearing or main bearing are executed.
  • Fig. 4 shows a cross section of a bearing point of the crankshaft 1. This is preferably a stroke bearing, the bearing complete with the lateral Radien and the associated Planfact is sanded.
  • Fig. 5 shows a further cross section of a bearing.
  • a dot-dash Centerline represents a generatrix of a cylinder dar. To few Shifted micrometer, the bearing surface has a spherical shape, indicated by the dashed line. The solid line shows a opposite shape of the bearing surface. This points in their maximum Distance to the center line of the generatrix also only a few microns on. Such a convex or concave shape is via a corresponding Execution of the used according to the above method Grinding wheel can be produced.
  • Fig. 6 shows a simplified plan view of a first crankshaft grinding machine 43.
  • a workpiece headstock 40 and the tailstock 9 mounted on a machine bed.
  • a grinding headstock 42 serves to receive a grinding spindle 30, which receives a grinding wheel.
  • the wheelhead 42 is on a Guide, which is movable in the direction of the x-axis arranged.
  • the CNC axis directions X and Z are arranged at right angles to each other.
  • the illustrated machining center allows a once clamped Crankshaft 1 according to the method described above and is finished, without a re-tightening is necessary. This succeeds compliance with even low tolerance fields.
  • Fig. 7 shows a wheel spindle 36, the a first grinding spindle I and a second Grinding spindle II has. These are accommodated in a wheelhead housing and can thereby be pivoted in a horizontal direction. To the this allows either the first grinding spindle I or the second Grinding spindle II is used. On the other hand, this also allows a first Spindle 32 with respect to a second spindle 34 may be designed differently can. For example, they are therefore different speed ranges structurally specifiable. Furthermore, the wheelhead 36 allows that different grinding wheels can be used. For example, can a first grinding wheel 33 to be a corundum, while a second Grinding wheel 35 is a CBN disc.
  • the construction of the Wheelhead 36 that different diameter of grinding wheels be used on a wheel spindle. With appropriate spatial Division of the construction allows the wheel spindle 36 also that a Grinding wheel is engaged on the crankshaft, while the other Grinding wheel is free.
  • the wheelhead 36 is horizontal pivotable.
  • the grinding wheels can also provide materials with respect to their materials differentiate between achieving quality. So the one can be a roughing disc, while the other is a sizing disk.
  • Fig. 8 shows a second crankshaft grinding machine 44.
  • Each wheelhead has independent CNC X axes and Z.
  • This means the respective grinding wheel of a wheelhead can be independent of the other at a different depository of the Crankshaft according to a CNC program can be used. Even with a grinding machine of this type is the invention Procedure to perform well.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

Procédé de meulage d'un vilebrequin (1) fixé de manière centré, meuleuse (43) à vilebrequins destinée à la mise en oeuvre dudit procédé, ainsi que vilebrequin (1) en acier ou fonte fortement alliés. Selon ledit procédé, les paliers de levée (12) et les paliers principaux (11) du vilebrequin (1) sont meulés à l'aide d'un seul dispositif de fixation de manière telle que les paliers principaux (11) au moins sont d'abord dégrossis, puis les paliers de levée (12) et ensuite les paliers principaux (11) sont finis. Ladite meuleuse constitue un centre d'usinage à l'aide duquel le dégrossissage et le finissage ne nécessitent qu'une seule étape de fixation.

Claims (11)

  1. Procédé pour le meulage d'un vilebrequin (1) immobilisé en son milieu, dont les paliers de levage (12) et les paliers principaux (11) sont meulés en étant maintenus par un seul dispositif de fixation de telle manière que, tout d'abord, au moins les paliers principaux (11) sont dégrossis et les paliers de levage (12) finis, puis les paliers principaux (11) sont finis.
  2. Procédé selon la revendication 1, selon lequel les paliers de levage (12) sont aussi dégrossis.
  3. Procédé selon la revendication 2, selon lequel les paliers de levage (12) sont dégrossis après que les paliers principaux (11) ont été dégrossis.
  4. Procédé selon l'une des revendications 1 à 3, selon lequel le dégrossissage et le finissage sont réalisés à l'aide d'une seule meule (31 ; 204).
  5. Procédé selon l'une des revendications 1 à 3, selon lequel le dégrossissage et le finissage sont chacun réalisés par une meule (31 ; 204).
  6. Procédé selon l'une des revendications 1 à 3, selon lequel au moins les paliers principaux (11) et les paliers de levage (12) sont chaque fois dégrossis et finis par une meule (31 ; 204).
  7. Procédé selon la revendication 4, 5 ou 6, selon lequel le meulage est réalisé par une meule au corindon.
  8. Procédé selon la revendication 4, 5 ou 6, selon lequel le meulage est réalisé par une meule au nitrure de bore cristallin.
  9. Procédé selon la revendication 7, selon lequel la vitesse de coupe de la meule au corindon est comprise entre 35 m/s et 100 m/s, de préférence entre 45 m/s et 100 m/s, et notamment entre 45 m/s et 70 m/s.
  10. Procédé selon la revendication 8, selon lequel la vitesse de coupe des meules céramiques au nitrure de bore cristallin est comprise entre 40 m/s et 140 m/s, notamment entre 80 m/s et 120 m/s, et celles des meules galvanisées au nitrure de bore cristallin entre 80 m/s et 200 m/s, notamment entre 100 m/s et 140 m/s.
  11. Procédé selon l'une des revendications 1 à 10, selon lequel lors du dégrossissage des paliers principaux (11), au moins un palier principal (11) est meulé en tant que siège de lunette (10).
EP00927018A 1999-04-30 2000-04-20 Degrossissage et finissage a la meule d'un vilebrequin a l'aide d'un seul dispositif de fixation Expired - Lifetime EP1181132B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19919893 1999-04-30
DE19919893A DE19919893A1 (de) 1999-04-30 1999-04-30 Vor- und Fertigschleifen einer Kurbelwelle in einer Aufspannung
PCT/EP2000/003633 WO2000066323A1 (fr) 1999-04-30 2000-04-20 Degrossissage et finissage a la meule d'un vilebrequin a l'aide d'un seul dispositif de fixation

Publications (2)

Publication Number Publication Date
EP1181132A1 EP1181132A1 (fr) 2002-02-27
EP1181132B1 true EP1181132B1 (fr) 2003-06-11

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EP00927018A Expired - Lifetime EP1181132B1 (fr) 1999-04-30 2000-04-20 Degrossissage et finissage a la meule d'un vilebrequin a l'aide d'un seul dispositif de fixation

Country Status (10)

Country Link
US (1) US6878043B1 (fr)
EP (1) EP1181132B1 (fr)
JP (1) JP2002542955A (fr)
CN (1) CN1157276C (fr)
AU (1) AU4554600A (fr)
CZ (1) CZ302536B6 (fr)
DE (2) DE19919893A1 (fr)
ES (1) ES2198307T3 (fr)
RU (1) RU2240218C2 (fr)
WO (1) WO2000066323A1 (fr)

Cited By (4)

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WO2009095299A1 (fr) * 2008-02-01 2009-08-06 Erwin Junker Maschinenfabrik Gmbh Procédé pour rectifier les paliers principaux et les paliers mobiles d’un vilebrequin par rectification cylindrique extérieure, et dispositif pour la mise en œuvre du procédé
DE102009051737B3 (de) * 2009-11-03 2010-10-07 Erwin Junker Maschinenfabrik Gmbh Verfahren zum Schleifen der Haupt- und Hublager einer Kurbelwelle durch Aussenrundschleifen und Schleifmaschine zum Durchführen des Verfahrens
DE102014211937B3 (de) * 2014-06-23 2015-10-22 Nagel Maschinen- Und Werkzeugfabrik Gmbh Verfahren und Vorrichtung zur Finish-Bearbeitung von Umfangsflächen rotationssymmetrischer Werkstückabschnitte
DE102014211938A1 (de) 2014-06-23 2015-12-24 Nagel Maschinen- Und Werkzeugfabrik Gmbh Finish-Werkzeug

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DE10144644B4 (de) 2001-09-11 2006-07-13 Bsh Holice A.S. Verfahren und Vorrichtung zum Schleifen von zentrischen Lagerstellen von Kurbelwellen
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DE10302685A1 (de) * 2003-01-15 2004-08-05 Muhr Und Bender Kg Vorrichtung und Verfahren zum Schleifen von Nockenwellen
DE10308292B4 (de) * 2003-02-26 2007-08-09 Erwin Junker Maschinenfabrik Gmbh Verfahren zum Rundschleifen bei der Herstellung von Werkzeugen aus Hartmetall und Rundschleifmaschine zum Schleifen von zylindrischen Ausgangskörpern bei der Herstellung von Werkzeugen aus Hartmetall
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CN100591477C (zh) * 2006-12-22 2010-02-24 潘旭华 一种曲轴磨削加工方法
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JP5125406B2 (ja) * 2007-10-24 2013-01-23 株式会社ジェイテクト 旋回装置およびそれを備えた円筒研削盤
JP5167920B2 (ja) * 2008-04-11 2013-03-21 株式会社ジェイテクト 研削盤及び研削方法
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DE102009021803B4 (de) * 2009-05-18 2012-07-12 Emag Holding Gmbh Verfahren und Vorrichtung zur Bearbeitung von Kurbelwellen
DE102009024209B4 (de) 2009-06-08 2012-12-06 Erwin Junker Maschinenfabrik Gmbh Verfahren und vorrichtung zum mehrlagenschleifen von werkstücken
DE102010008694A1 (de) * 2009-07-21 2011-02-10 Ferroll Gmbh Vorrichtung zum Walzen eines exzentrischen Rotationsbauteils, Walzmaschine und Verfahren sowie exzentrisches Rotationsbauteil
DE102009038817B4 (de) * 2009-08-25 2013-06-06 Emag Holding Gmbh Verfahren und Schleifmaschine zum Schleifen von zylindrischen und gekrümmten Konturen
JP5505099B2 (ja) * 2010-06-04 2014-05-28 株式会社ジェイテクト 複合研削盤による研削方法
DE102011076809B4 (de) * 2011-05-17 2014-06-26 Erwin Junker Maschinenfabrik Gmbh Verfahren zur komplettbearbeitung zumindest von unbearbeiteten zapfen und planschultern geschmiedeter oder gegossener rohlinge einer kurbelwelle sowie zur durchführung des verfahrens vorgesehene fertigungslinie
DE102011110117B4 (de) 2011-08-15 2015-01-08 Emag Holding Gmbh Verfahren und Schleifmaschine zum Schleifen exzentrischer Werkstücke
DE102011089654B4 (de) * 2011-12-22 2015-01-29 Erwin Junker Maschinenfabrik Gmbh Verfahren zur drehbearbeitung von planschultern an den wangen einer kurbelwelle, verwendung des verfahrens zur komplettbearbeitung von kurbelwellenrohlingen sowie kurbelwellen-drehmaschine zur drehbearbeitung der planschultern
CN102773800B (zh) * 2012-08-15 2014-11-12 潘旭华 一种提高曲轴连杆颈随动磨削的圆度精度的方法
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EP2769806B1 (fr) * 2013-02-21 2014-12-17 Supfina Grieshaber GmbH & Co. KG Dispositif et système de finition de surface d'une pièce à usiner en forme de vilebrequin ou d'arbre à came
CN103273407A (zh) * 2013-05-13 2013-09-04 东华大学 一种碗型cbn砂轮端面磨削组件
CN103317400B (zh) * 2013-06-28 2015-07-15 侯马市东鑫机械铸造有限公司 发动机曲轴自动研磨抛光机
US9321140B2 (en) 2013-08-01 2016-04-26 Ford Global Technologies, Llc System for machine grinding a crankshaft
JP2015044249A (ja) * 2013-08-27 2015-03-12 コマツＮｔｃ株式会社 バランス測定機能付ターニング＆ブローチングマシン
CN103707145B (zh) * 2013-12-31 2015-12-16 重庆歇马机械曲轴有限公司 曲轴的主轴颈打磨用机床
DE102014204807B4 (de) * 2014-03-14 2016-12-15 Erwin Junker Grinding Technology A.S. Verfahren und Vorrichtung zum Schleifen von Großkurbelwellen
CN105415175A (zh) * 2014-09-04 2016-03-23 青岛淄柴博洋柴油机股份有限公司 曲轴磨床随动中心架
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US9969053B2 (en) * 2015-05-13 2018-05-15 GM Global Technology Operations LLC Grinder adaptor assembly
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DE102016204273B4 (de) * 2016-03-15 2023-11-30 Erwin Junker Maschinenfabrik Gmbh Verfahren zur schleif-komplettbearbeitung von wellenförmigen werkstücken mit zylindrischen und profilierten abschnitten
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EP3157708B1 (fr) 2014-06-23 2019-02-27 Nagel Maschinen- und Werkzeugfabrik GmbH Procédé et dispositif servant à effectuer des finitions sur les surfaces périphériques de parties de pièces à usiner symétriques en rotation

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JP2002542955A (ja) 2002-12-17
US6878043B1 (en) 2005-04-12
RU2240218C2 (ru) 2004-11-20
ES2198307T3 (es) 2004-02-01
CN1360534A (zh) 2002-07-24
DE19919893A1 (de) 2000-11-09
CN1157276C (zh) 2004-07-14
CZ302536B6 (cs) 2011-07-07
DE50002544D1 (de) 2003-07-17
CZ20013878A3 (cs) 2002-08-14
EP1181132A1 (fr) 2002-02-27
AU4554600A (en) 2000-11-17

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