EP0253908B1 - Outil de brunissage - Google Patents

Outil de brunissage Download PDF

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Publication number
EP0253908B1
EP0253908B1 EP86109931A EP86109931A EP0253908B1 EP 0253908 B1 EP0253908 B1 EP 0253908B1 EP 86109931 A EP86109931 A EP 86109931A EP 86109931 A EP86109931 A EP 86109931A EP 0253908 B1 EP0253908 B1 EP 0253908B1
Authority
EP
European Patent Office
Prior art keywords
roller
burnishing
workpiece
supporting
shape
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.)
Expired - Lifetime
Application number
EP86109931A
Other languages
German (de)
English (en)
Other versions
EP0253908A1 (fr
Inventor
Garri Dr.-Ing. Berstein
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.)
Hegenscheidt MFD GmbH and Co KG
Original Assignee
Wilhelm Hegenscheidt GmbH
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 Wilhelm Hegenscheidt GmbH filed Critical Wilhelm Hegenscheidt GmbH
Priority to EP86109931A priority Critical patent/EP0253908B1/fr
Priority to DE8686109931T priority patent/DE3670786D1/de
Priority to JP61219868A priority patent/JPS6330138A/ja
Priority to US07/049,699 priority patent/US4782682A/en
Publication of EP0253908A1 publication Critical patent/EP0253908A1/fr
Application granted granted Critical
Publication of EP0253908B1 publication Critical patent/EP0253908B1/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
    • 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

Definitions

  • the invention relates to a smooth rolling tool for smooth rolling in the puncture of shaft journals, in particular crankshaft journals, by means of at least one rolling roller which can be applied to the workpiece with rolling force, with at least one supporting roller which can be applied to the workpiece and at least one further supporting roller for supporting a rolling roller, the supporting roller for the rolling roller has a shape deviating from the smooth cylindrical shape.
  • Rolling tools of the type described above and the machines suitable for operating the rolling tools are already known from DE-PS 2146994. However, tools of this type are only suitable either for rolling cylindrical pins or for rolling cylindrical pins so that after the rolling operation the cylindrical pin is slightly convex.
  • crankshaft journals in particular are designed to be slightly concave or convex, in order to influence edge pressures and thus bearing wear.
  • the deviation from the cylindrical shape is only a few gm, e.g. 8 J.l.m.
  • the respective size of the deviation from the cylindrical shape must be adhered to very precisely in the case of such journals, because it is based on extensive experience with regard to the functionality.
  • Such a deviation from the cylindrical shape of the bearing journal cannot be achieved with sufficient accuracy with a correspondingly shaped roller, as is known, for example, from DE-PS 2 146 994, FIG.
  • Pre-processing tolerances and material inhomogeneities make the rolling result uncertain.
  • the elastic deformability of the workpiece also makes it almost impossible to determine and determine the correct roll contour.
  • the invention is based on the object of proposing a rolling tool with which the pin surfaces which have already been pre-curved can be rolled with a satisfactory rolling result both with regard to the smooth rolling result and with regard to the curvature shape accuracy.
  • the smooth rolling roller is so slim that it deforms elastically over the course of the longitudinal axis under the rolling force transmitted by the supporting roller and applies it to the workpiece shape
  • the supporting roller for the rolling roller axially in the area of its two ends each has a support collar as a support surface for the roller and has in the middle part such diameter dimensions that the desired elastic deflection of the roller is possible.
  • a slim and e.g. cylindrical roller roll can be applied very well to the contour of the workpiece to be rolled.
  • each support collar has a convex curve shape. This is a favorable design with relatively small radii of curvature of the surface to be rolled.
  • each support collar is cylindrical. This simplifies the manufacture of the tools and nevertheless achieves a satisfactory service life, at least with relatively large radii of curvature of the workpiece.
  • each support collar is conical with a cone tip directed onto the other support collar and with a cone inclination sufficient for the desired elastic deflection of the roll.
  • This is also a design which is suitable both with relatively large and with relatively small radii of curvature of the cross-sectional shape of a section through the axis of rotation of the workpiece, the cone inclination here being able to be adapted accordingly.
  • the support roller for the roller is spherically shaped with a radius of curvature equal to or less than the radius of curvature of the longitudinal contour of the workpiece, when viewed along a section along the axis of rotation, when using the slim smooth-rolling roller already mentioned.
  • a deflection of the roller in the order of magnitude required here can be brought about in such a way that the roller rolls properly against the contour of the workpiece and the peripheral surface of the workpiece rolls without undue distortion of the contour of the workpiece.
  • the support roller for the rolling roller can also be formed by two truncated cones with the base facing one another, the base surfaces of which are connected to one another via a spherical or cylindrical intermediate piece and the taper inclination is sufficiently large, a bending of the rolling roller to adapt to the contour of the workpiece allow.
  • Such a shape of the support rollers is easy to manufacture and, particularly with wide journals and large radii of curvature of the cross-sectional contour of the workpiece, results in the roller roller bearing well against this contour and having a favorable force distribution.
  • a support roller that can be placed on the workpiece is concavely or convexly curved to match the contour of the workpiece with a radius of curvature that is larger in the case of concave curvature and smaller in the case of convex curvature than the corresponding radius of curvature of the workpiece.
  • a better load distribution is achieved in the area of the support roller.
  • FIGS. 1 to 6 show sections of various forms of a support roller assigned to a rolling roller together with the assigned workpiece contour, and in FIG. 7 additionally a detail of the contour of a support roller that can be placed on the workpiece.
  • a support roller 7 is half shown with its axis of rotation shown as a center line in side view.
  • the support roller 7 consists essentially of a central part 7 'which e.g. can be cylindrical, which is delimited on both ends by the support collars 20.
  • the support collars 20 are larger in diameter than the central part 7 'and therefore protrude radially.
  • the circumferential surface of the support bundles 20 is cylindrical and a cylindrical roller 6 with the longitudinal axis 21 lying parallel to the rotational axis of the support roller 7 comes into contact with the cylindrical peripheral surfaces of the bundles 20 in a rolling tool known in its construction Known rolling tool, only the roller 6 can be brought into contact with a journal-shaped workpiece 1, for example on the journal of a crankshaft.
  • the pin whose axis of rotation is again indicated as a center line, has a convex outer contour in a longitudinal section through this center line. The convex curvature of the pin is shown in a very exaggerated manner in FIG. 1.
  • the pin 1 is rolled in the groove in a known manner.
  • the support roller 7 is moved radially against the workpiece 1 with the necessary rolling force, as a result of which the roller 6 comes into contact with the workpiece 1 at the highest point of the contour thereof.
  • the smooth rolling roller 6 is now bent around the contour of the workpiece 1. Since the roller 6 is slim, only a small force is required for the necessary bending. After the bending has taken place and the surface of the roller 6 lies completely against the convex cross-sectional surface of the workpiece 1, the rolling force builds up and the rolling process can now be carried out in the usual way.
  • the workpiece 1 is thus rolled over the entire circumferential surface without fear of an inadmissible change in the convex contour of the workpiece 1.
  • FIG. 2 The construction of a tool according to FIG. 2 is very similar to that described in relation to FIG. 1 and in particular the mode of operation is the same.
  • a support roller 8 is shown with a central part 8 ', which in turn is limited on both ends by support collars 19 for the roller roll 6.
  • the peripheral surfaces of these support collars 19 are spherical, however, so that they abut the roller roll 6 with point contact. This is particularly advantageous in the case of narrow pins 1 with a relatively small radius of curvature of the cross-sectional contour, because when the roller 6, which is transmitted by the coils 19, the roller 6 is applied to the contour of the pin 1, an undesirable edge pressure in the area of Support collars 19 can be avoided.
  • the central part 8 ' is also radially far enough back so that the deflection of the roller and its abutment against the workpiece contour is not hindered by the central part 8'.
  • the respective middle part between the mentioned support collars it should be expressly pointed out that it is not necessary for the respective middle part between the mentioned support collars to be cylindrical. However, it must be shaped and dimensioned so that the roller 6 remains the necessary freedom from deflection.
  • FIG. 3 One possibility of combining the advantages of the embodiments according to FIGS. 1 and 2 is shown in FIG. 3.
  • the structure and mode of operation of a tool according to FIG. 3 is as described for FIGS. 1 and 2.
  • FIG. 3 there is again a support roller 9, the central part 9 'of which is delimited by the support collars 18.
  • the circumferential surfaces of these support collars 18 are each conical in opposite directions.
  • the transition of the end faces to the cylindrical peripheral surface can be rounded off in the case of the roller 6. This is advantageous because the length of the roller 6 can then extend over the entire length of the support roller 7 and still the point of contact between the roller 6 and Support roller 9 lies further inwards on the conical peripheral surfaces of the support collars 18.
  • the dimensions of the middle part 9 ' are in turn such that the necessary deflection of the roller 6 is not hindered.
  • the inclination of the conical circumferential surfaces of the support collars 18 is also corresponding. Due to the design described, undesired edge pressure between the roller and the support roller is avoided on the one hand, and the support roller can be produced relatively simply in its contour at the same time.
  • FIGS. 4 to 6 show exemplary embodiments which allow the construction of a concavely curved journal, for example a concavely curved crankshaft journal.
  • the tools according to the exemplary embodiments in FIGS. 4 to 6 also each have a cylindrical roller 6, which are bent over an associated support roller 10, 11 or 12 and are thus placed on the workpiece contour. As a result, the workpiece 2 is not changed in an impermissible order of magnitude in its concave cross-sectional shape.
  • the support roller 10 essentially consists of two truncated cones with the base facing each other with a common axis of rotation indicated as a center line.
  • the base surfaces of the two truncated cones are separated by an intermediate piece 14, which is provided as a cylindrical part in the exemplary embodiment according to FIG. 4.
  • the embodiment according to FIG. 5 corresponds entirely to the embodiment according to FIG. 4, however, in the support roller 11 provided according to FIG. 5, the intermediate piece 13 is cylindrical, but is rounded in the transition region to the conical surfaces of the support roller 11. In this way edge pressures can be avoided.
  • a tool according to the exemplary embodiment according to FIG. 6 is essentially constructed in the same way as the tools already described for FIGS. 4 and 5.
  • the support roller 12 used in FIG. 6 is of spherical design, however, care must be taken that the radius of curvature 15 of the support roller 12 is at most the same but better than the radius of curvature 16 of the workpiece 2.
  • the axis of rotation 17 of the workpiece 2 is again entered in FIG. 6, which lies parallel to the corresponding axes of rotation of the roller 6 and the respectively assigned support roller.
  • a support roller according to FIG. 6 makes it possible in a simple manner to compensate for possible parallelism errors between the axis of rotation 17 of the workpiece 2 and the rotation axis of the support roller 12, which is not described in more detail.
  • FIG. 7 shows an embodiment according to the structure of FIG. 1.
  • the illustration according to FIG. 1 is, however, expanded in FIG. 7 by a support roller 3 resting on the workpiece 1, which is only shown half.
  • the support roller 3 Corresponding to the convex curvature of the workpiece 1, the support roller 3 has a concave curvature with a radius of curvature 4 that is greater than the radius of curvature 5 of the workpiece 1.
  • pins e.g. Crankshaft journal
  • the desired contour is achieved with the required accuracy and, at the same time, the previous manufacturing process for pre-machining the workpiece can be retained unchanged.
  • the tool itself is simple in construction and can be manufactured inexpensively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Rolling Contact Bearings (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Claims (7)

1. Outil pour le brunissage, en plongée, de tourillons de contour extérieur convexe, au moyen d'au moins un galet de brunissage (6) qui peut s'appliquer avec une certaine force contre la pièce à brunir (1), comportant au moins un galet d'appui (3) qui peut s'appliquer contre la pièce à brunir (1) et au moins un autre galet d'appui (7, 8, 9) pour appuyer le galet de brunissage (6), outil dans lequel le galet d'appui (7, 8, 9) prévu pour le galet de brunissage (6) présente une forme qui s'écarte de la forme cylindrique lisse, dans lequel le galet de brunissage (6) est de forme si élancée qu'il se déforme élastiquement le long de l'axe longitudinal (21) sous la force transmise par le galet d'appui (7-9) et s'adapte à la forme de la pièce à brunir, et dans lequel le galet d'appui (7, 8, 9) prévu pour le galet de brunissage (6) présente, dans la zone de chacune de ses deux extrémités et dans le sens axial, un collet d'appui (18, 19, 20) comme surface d'appui pour le galet de brunissage (6) et présente, dans la partie médiane (7', 8', 9'), des dimensions en diamètre telles que la flexion transversale élastique désirée du galet de brunissage (6) est possible.
2. Outil de brunissage selon la revendication 1, caractérisé en ce que la surface d'appui de chaque collet d'appui (19) présente une forme courbe convexe.
3. Outil selon la revendication 1, caractérisé en ce que la surface d'appui de chaque collet d'appui (20) est cylindrique.
4. Outil selon la revendication 1, caractérisé en ce que la surface d'appui de chaque collet d'appui (18) est conique avec le sommet du cône dirigé vers l'autre collet d'appui et avec un angle de cône suffisant pour la flexion transversale élastique désirée du galet de brunissage (6).
5. Outil pour le brunissage, en plongée, de tourillons de contour extérieur concave, au moyen d'au moins un galet de brunissage (6) qui peut s'appliquer avec une certaine force contre la pièce à brunir (2), comportant au moins un galet d'appui (3) qui peut s'appliquer contre la pièce à brunir (2) et au moins un autre galet d'appui (12) pour appuyer le galet de brunissage (6), outil dans lequel le galet d'appui (12) prévu pour le galet de brunissage (6) présente une forme qui s'écarte de la forme cylindrique lisse, dans lequel le galet de brunissage (6) est de forme si élancée qu'il se déforme élastiquement le long de l'axe longitudinal (21) sous la force transmise par le galet d'appui (12) et s'adapte à la forme de la pièce à brunir, et dans lequel le galet d'appui (12) prévu pour le galet de brunissage (6) est de forme bombée avec un rayon de courbure (15) égal ou inférieur au rayon de courbure (16) du contour longitudinal, en coupe, de la pièce à brunir (2), vu selon une coupe longitudinale par l'axe de rotation (17).
6. Outil pour le brunissage, en plongée, de tourillons de contour extérieur concave, au moyen d'au moins un galet de brunissage (6) qui peut s'appliquer avec une certaine force contre la pièce à brunir (2), comportant au moins un galet d'appui (3) qui peut s'appliquer contre la pièce à brunir (2) et au moins un autre galet d'appui (10, 11) pour appuyer le galet de brunissage (6), outil dans lequel le galet d'appui (10, 11) prévu pour le galet de brunissage (6) présente une forme qui s'écarte de la forme cylindrique lisse, dans lequel le galet de brunissage (6) est de forme si élancée qu'il se déforme élastiquement le long de l'axe longitudinal (21) sous la force transmise par le galet d'appui (10, 11) et s'adapte à la forme de la pièce à brunir, dans lequel le galet d'appui (10, 11) prévu pour le galet de brunissage (6) est formé de deux troncs de cône qui sont dirigés l'un vers l'autre par leur base et dont les surfaces de base sont reliées l'une à l'autre par l'intermédiaire d'un élément intermédiaire bombé (13) ou cylindrique (14), et dans lequel l'angle du cône est suffisant pour autoriser une flexion élastique du galet de brunissage (6) pour son adaptation au contour de la pièce à brunir (2).
7. Outil selon l'une des revendications 1 à 6, caractérisé en ce qu'un galet d'appui (3), qui peut s'appliquer contre la pièce à brunir (1, 2), est incurvé sous une forme concave ou convexe pour s'adapter au contour de la pièce à brunir (1, 2), avec un rayon de courbure (4) qui est, dans le cas d'une courbure concave, supérieur et, dans le cas d'une courbure convexe, inférieur, au rayon de courbure correspondant (5) de la pièce à brunir (1, 2).
EP86109931A 1986-07-19 1986-07-19 Outil de brunissage Expired - Lifetime EP0253908B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP86109931A EP0253908B1 (fr) 1986-07-19 1986-07-19 Outil de brunissage
DE8686109931T DE3670786D1 (de) 1986-07-19 1986-07-19 Werkzeug zum glattwalzen.
JP61219868A JPS6330138A (ja) 1986-07-19 1986-09-19 ロール仕上げ工具
US07/049,699 US4782682A (en) 1986-07-19 1987-05-13 Rolling Mill Tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86109931A EP0253908B1 (fr) 1986-07-19 1986-07-19 Outil de brunissage

Publications (2)

Publication Number Publication Date
EP0253908A1 EP0253908A1 (fr) 1988-01-27
EP0253908B1 true EP0253908B1 (fr) 1990-05-02

Family

ID=8195280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109931A Expired - Lifetime EP0253908B1 (fr) 1986-07-19 1986-07-19 Outil de brunissage

Country Status (4)

Country Link
US (1) US4782682A (fr)
EP (1) EP0253908B1 (fr)
JP (1) JPS6330138A (fr)
DE (1) DE3670786D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008007563U1 (de) * 2008-06-05 2008-10-02 Hegenscheidt-Mfd Gmbh & Co. Kg Festwalzrollenkopf
DE202013006779U1 (de) * 2013-07-27 2014-10-29 Hegenscheidt-Mfd Gmbh & Co. Kg Walzwerkzeug

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2146994C3 (de) * 1971-09-21 1974-03-14 Wilhelm Hegenscheidt Gmbh, 5140 Erkelenz Einrichtung zum Glattwalzen von Kurbelwellenlagersitzen

Also Published As

Publication number Publication date
DE3670786D1 (de) 1990-06-07
US4782682A (en) 1988-11-08
JPS6330138A (ja) 1988-02-08
EP0253908A1 (fr) 1988-01-27
JPH0238052B2 (fr) 1990-08-28

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