WO2005077564A1 - Procede et machine pour la fabrication de rouleaux - Google Patents

Procede et machine pour la fabrication de rouleaux Download PDF

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Publication number
WO2005077564A1
WO2005077564A1 PCT/SE2005/000174 SE2005000174W WO2005077564A1 WO 2005077564 A1 WO2005077564 A1 WO 2005077564A1 SE 2005000174 W SE2005000174 W SE 2005000174W WO 2005077564 A1 WO2005077564 A1 WO 2005077564A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolls
rolling gap
parting
machine
roller
Prior art date
Application number
PCT/SE2005/000174
Other languages
English (en)
Inventor
Henning Wittmeyer
Original Assignee
Aktiebolaget Skf
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 Aktiebolaget Skf filed Critical Aktiebolaget Skf
Publication of WO2005077564A1 publication Critical patent/WO2005077564A1/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
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/14—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies
    • B21H1/16—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies for bearings

Definitions

  • the present invention relates to a method for manufacture of rollers, and particularly rollers for use in roller bearings, and also to a machine for such manufacture.
  • rollers for roller bearings and the like are commonly effected by cutting blanks from bar material, and subsequently pressing the blanks thus severed from the bar. This production method gives high material allowances, which must then be removed by grinding operations. Additional operations like tumbling to remove burrs are necessary in some cases.
  • rollers for spherical roller bearings For production of rollers for spherical roller bearings, toroidal roller bearings and cylindrical roller bearings there are at present used several different methods depending of type and size of bearing roller. All these earlier methods are associated with high costs and low flexibility. '
  • the material allowance after pressing varies, in dependency of the method used.
  • several types of rollers are turned directly from a ground bar. This is a type of process, which is both expensive and comparatively slow.
  • Other types of rollers are made from wire in a press that combines the parting off and pressing operations.
  • the blanks hereby will get poor weight tolerances, which generates burr on the torus, when the blank is in the upper weight tolerance. If the burr can be removed and the tolerance of the pressed roller can be improved, this will affect the cost in the overall manufacturing chain. Some rough grinding operations may either be eliminated or reduced.
  • the purpose of the present invention is to propose a method for manu acture of rollers, particularly for roller bearings, with the aim to improve the production rate, to reduce the need for finishing treatment and to achieve a less expensive manufacture and this is obtained in accordance with the method defined in the accompanying claim 1.
  • the invention also refers to a machine intended for performing the method of claim 1, and this machine is defined by the features incorporated in the accompanying claim 6.
  • the invention will be further described with reference to the accompanying drawings, schematically illustrating the method and the machine according to the invention.
  • Fig. 1 illustrates in a schematic side view the manufacture of symmetrical, crowned rollers from wire material in accordance with the claimed method, and with a claimed machine
  • Fig. 2 is a schematic side view of a part- of a machine for manufacture of symmetrical, crowned rollers from wire material or bar material in accordance with the claimed method
  • Fig. 2a - 2e is an end view of the manufacturing principle illustrated in Fig. 2,
  • Fig. 3 is a schematic side view showing manufacture of symmetrical, crowned rollers from bar material, in accordance with the invention
  • Fig. 4 shows in larger scale the roll gap of the device according to Fig. 3, and
  • Figs. 4a - 4e show end views of different supporting means at the device illustrated in Fig. 4.
  • Fig. 1 is schematically illustrated a first embodiment of a machine for manufacture of bearing rollers, which machine incorporates a wire reel 1, from which a wire, of a suitable bearing steel is pulled out by means of pulling rolls 3.
  • the wire material can be straightened and stretched to a substantially straight material strand 2 by being pulled through a drawing die 4.
  • the wire is advanced in axial direction A between at least two profiled rolls 5, 6, which are arranged aligned with each other to form a rolling gap there between.
  • the material strand 2 is also subjected to a pulling force P, acting to stretch the material strand in axial direction during the rolling operation.
  • Each one of the rolls 5, 6 has a substantially helical profile pattern 7, which pattern must have a progressive increase in profile depth, and also an changed profile pitch, as the rollers during the rolling operation are both changing their diameter and their length. • Thus the roller profile will change to keep the roller volume constant. At least one, and preferably all of these profiled rolls 5, 6 is driven to rotate about its geometrical axis. However, the wire 2 is kept immobile, so it can not rotate as a result of its contact with the rotating rolls 5, 6.
  • the material of the wire 2 will be re-shaped to obtain a shape in form of a continuous wire formed as a continuous series of interconnected roller-shaped bodies 8, having a shape which, is dependent of the shape of the profile pattern 7 in the rolls 5, 6, and which continuous series of bodies by an appropriate severing tool, illustrated at 9, are separated to individual roller blanks 10.
  • this severing tool has been illustrated as a cutting wheel, it is possible to use any other severing method.
  • Fig. 2 illustrates a portion around the roll gap of the machine according to Fig. 1, or of a slightly modified machine, which can work with material strands 2 either in the form of a wire or a bar.
  • the end views according to Figs. 2a - 2e show different solutions for supporting the material strand 2.
  • the material strand 2 is not rotating. This is of course necessary when he material is in form of wire stored in a reel, but it can be advantageous also when the material is in form of a bar.
  • Fig. 2a illustrates how the roll gap is formed by three rolls 5, 6, 6' which thereby also will support the material strand 2. As illustrated the material strand 2, either wire or bar, is non- rotating, whereas the rolls 5, 6, 6' are rotating.
  • Fig. 2b is shown another embodiment, where two rolls 5, 6 are arranged around the material strand 2, which is kept from rotating.
  • a yoke-formed support 11 which is brought to rotate together with the rolls 5, 6 about the material strand 2.
  • Fig. 2c illustrates another solution, where the non-rotating material strand 2 positioned between the rolls 5, 6 is supported by a small support roller 12.
  • the support roller 12 is rotating together with the rolls 5, 6 about the material strand 2.
  • Fig. 2d shows a further embodiment where the non-rotating material strand 2 is supported by two small support rollers 12, 13 positioned substantially opposite to. each other, the support rollers 12, 13 are preferably positioned to have contact with the material strand at positions offset about 90° from the contact positions between forming rolls 5, 6 and the material strand 2.
  • the cluster of rolls 5, 6 and support rollers 12, 13 are arranged to rotate together around the material strand 2.
  • Fig. 2e shows still another embodiment, where the non-rotating material strand 2 is supported between two opposed yoke-formed supports 11, 14. Also in this case the supports 11, 14 and the forming rolls 5, 6 are arranged to rotate together around the still- standing material strand 2.
  • Fig. 3 illustrates a machine and a method for manufacture of rollers in accordance with the invention, where the material strand 2 used as initial material is a bar, which is preferably a drawn or ground bar of a suitable bearing steel.
  • This bar 2 is pulled in axial direction A by a pair of pulling rolls 3, and is advanced between at least two profiled rolls 5, 6, which are arranged aligned with each other to form a rolling gap there between. After passage through the rolling gap the bar might be subjected to a pulling force P, which can be used to stretch the bar material in axial direction during the rolling operation.
  • Each one of the rolls 5, 6 has a substantially helical profile pattern 7, where the profile depth and also the pitch increases from the input end, and towards the output end from the roll gap.
  • At least one, and preferably all these profiled rolls 5, 6 are driven to rotate about the geometrical axis.
  • the bar 2 can preferably be prevented from rotating together with the rolls 5, 6, but it is also possible to allow the bar material 2 to rotate as a reaction of the contact with the rotating rolls.
  • the material of the bar 1 will be re-shaped to obtain a shape in form of a bar having a continuous series of interconnected roller-shaped bodies 8, having a shape which is dependent of the shape of the profile pattern 7 in the rolls 5, 6, and which bodies are cut off by means of an appropriate severing tool, illustrated at 9. Although this severing tool has been illustrated as a cutting wheel, it is possible to use any other severing method.
  • a very important advantage gained with the continuous rolling operation described above, is of course the high production rate, which can be achieved in dependency of the feed rate and the rotational speed of the at least one roll 5, 6, 6'.
  • a high rolling speed is achieved, it is necessary to use a method for separating the rolled rollers from the material strand 2, which allows a sufficiently high parting rate.
  • the parting rate obtained with a cutting wheel as intimated in the drawing figures, should reduce the possible overall production rate, to a level, which is insufficient for giving an acceptable production from economic view.
  • the cutting of the rollers is made at a substantially higher rate, which possibly can be achieved with multiple cutting tools, or preferably as an adiabatic separation method, by which the separation rate can be adjusted to speeds matching the rolling rate, which can be obtained according to the method.
  • rollers produced with the method according to the invention can preferably be used for spherical roller bearings, for toroidal roller bearings and also for cylindrical roller bearings, and the profile pattern 7 of the rolls 5, 6, 6' is of course profiled in different ways for the different rollers to be produced.
  • the rolls 5, 6, 6' must have a progressive increase in profile depth, and also an increased profile pitch, as the rollers during the rolling operation ' are both increasing their diameter and their length.
  • the parting tool is preferably an equipment, operating at a very high parting rate, e.g. -working according to an adiabatic parting method, well known in the art.
  • a mechanism positioned after the rolling gap might be arranged to subject the material strand to an axial pulling force P, which is particularly important when the initial material is a wire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)

Abstract

L'invention concerne un procédé et un appareil pour la fabrication de rouleaux, et en particulier les rouleaux de roulements à rouleaux, selon la combinaison suivante : avancée de brin de matériau (2) dans un intervalle de roulement suivant la direction axiale entre au moins deux cylindres rotatifs alignés (5, 6, 6'), au moins l'un d'eux étant entraîné en rotation, ce qui permet de former le brin de matériau (2) en une série consécutive d'ébauches de rouleaux (8) par passage dans l'intervalle, lequel est défini par un profil sensiblement hélicoïdal (7) sur chacun des rouleaux (5, 6, 6'), avec séparation des ébauches individuelles (10) à partir de la série continue d'ébauches (8), après le passage dans l'intervalle, aux fins de transition vers une finition ultérieure de chaque ébauche.
PCT/SE2005/000174 2004-02-12 2005-02-10 Procede et machine pour la fabrication de rouleaux WO2005077564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400307-5 2004-02-12
SE0400307A SE0400307L (sv) 2004-02-12 2004-02-12 Metod och maskin för tillverkning av rullar

Publications (1)

Publication Number Publication Date
WO2005077564A1 true WO2005077564A1 (fr) 2005-08-25

Family

ID=31885299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/000174 WO2005077564A1 (fr) 2004-02-12 2005-02-10 Procede et machine pour la fabrication de rouleaux

Country Status (2)

Country Link
SE (1) SE0400307L (fr)
WO (1) WO2005077564A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109013987A (zh) * 2018-07-09 2018-12-18 浙江天马轴承集团有限公司 一种轴承滚子冷辗成型机
CN109013986A (zh) * 2018-07-09 2018-12-18 浙江天马轴承集团有限公司 轴承滚子冷辗成型机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU378276A1 (ru) * 1970-04-27 1973-04-18 Инструмент для поперечной прокатки тел вращения
GB1393523A (en) * 1971-02-18 1975-05-07 Glacier Metal Co Ltd Method for forming a ball and socket joint
US4084303A (en) * 1976-01-07 1978-04-18 Helipebs Limited Forming roll for rolling cylindrical bodies from cylindrical rod stock, and a method of making the same
SU1256839A1 (ru) * 1984-07-30 1986-09-15 Белорусский Ордена Трудового Красного Знамени Политехнический Институт Способ получени цилиндрических заготовок и устройство дл его осуществлени
RU2048230C1 (ru) * 1993-04-08 1995-11-20 Малое арендное предприятие "Гефест" Способ изготовления тел качения

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU378276A1 (ru) * 1970-04-27 1973-04-18 Инструмент для поперечной прокатки тел вращения
GB1393523A (en) * 1971-02-18 1975-05-07 Glacier Metal Co Ltd Method for forming a ball and socket joint
US4084303A (en) * 1976-01-07 1978-04-18 Helipebs Limited Forming roll for rolling cylindrical bodies from cylindrical rod stock, and a method of making the same
SU1256839A1 (ru) * 1984-07-30 1986-09-15 Белорусский Ордена Трудового Красного Знамени Политехнический Институт Способ получени цилиндрических заготовок и устройство дл его осуществлени
RU2048230C1 (ru) * 1993-04-08 1995-11-20 Малое арендное предприятие "Гефест" Способ изготовления тел качения

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197403, Derwent World Patents Index; Class M21, AN 1974-05157V, XP002986137 *
DATABASE WPI Week 198718, Derwent World Patents Index; Class M21, AN 1987-127796, XP002986136 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109013987A (zh) * 2018-07-09 2018-12-18 浙江天马轴承集团有限公司 一种轴承滚子冷辗成型机
CN109013986A (zh) * 2018-07-09 2018-12-18 浙江天马轴承集团有限公司 轴承滚子冷辗成型机

Also Published As

Publication number Publication date
SE0400307L (sv) 2005-08-13
SE0400307D0 (sv) 2004-02-12

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