WO2000055382A1 - Procede pour produire une cage destinee a un palier a roulement et cage ainsi obtenue - Google Patents

Procede pour produire une cage destinee a un palier a roulement et cage ainsi obtenue Download PDF

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Publication number
WO2000055382A1
WO2000055382A1 PCT/EP2000/000417 EP0000417W WO0055382A1 WO 2000055382 A1 WO2000055382 A1 WO 2000055382A1 EP 0000417 W EP0000417 W EP 0000417W WO 0055382 A1 WO0055382 A1 WO 0055382A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
welding
joints
weld seam
area
Prior art date
Application number
PCT/EP2000/000417
Other languages
German (de)
English (en)
Inventor
Karl-Ludwig Grell
Original Assignee
INA Wälzlager Schaeffler oHG
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 INA Wälzlager Schaeffler oHG filed Critical INA Wälzlager Schaeffler oHG
Priority to DE10080504T priority Critical patent/DE10080504D2/de
Publication of WO2000055382A1 publication Critical patent/WO2000055382A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/02—Pressure butt welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/08—Seam welding not restricted to one of the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0006—Electron-beam welding or cutting specially adapted for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0086—Welding welding for purposes other than joining, e.g. built-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F16C33/545—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part rolled from a band
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/36—Material joints by welding

Definitions

  • the invention relates to a method for producing a cage for a rolling bearing, consisting of two side rings which are connected to one another by webs, the cage being rolled out of a flat band after punching the pockets into a cylindrical or a conical shape and at its abutments is welded.
  • the invention also relates to a cage produced by the method according to the invention.
  • connection welding creates welding poses which have to be removed in a subsequent work step, since they could otherwise damage the bearing.
  • imperfections arise during the connection welding. These are to be understood as geometrical irregularities going inwards, which can occur in different gradations.
  • the imperfections Their spectrum begins within the roughness and ends at a depth in which they have a lasting effect on the function of the component, ie in extreme cases make the component unusable.
  • Such imperfections now have a notch effect, ie they cause a disturbance in the uniform flow of force in the component due to the sudden change in the cross section or the surface contour.
  • a stress concentration develops at these notches, whereby a stress peak forms in the notch base.
  • This notch now has two effects. Firstly, the load-bearing cross-section is reduced, secondly, the stress is concentrated on the notch base. This notch effect within the weld between the two joints of the cage now has the effect that its fatigue strength is not guaranteed under high loads.
  • the object of the invention is therefore to develop a welded cage for a rolling bearing, which ensures reliable fatigue strength even under the highest loads.
  • this object is achieved according to the characterizing part of claim 1 in that the cage is subjected to an additional fusion welding in the area of the weld seam after the connection welding.
  • the material of the butt joints joined together during the joint welding is melted again briefly.
  • the weld seam is smoothed by material coming from protruding tips into existing depressions.
  • this increases the effective connection cross section in the area of the joints compared to the theoretically possible connection cross section.
  • the notch effect is reduced by this material shift, so that a uniform flow of force within the weld seam can take place, ie the voltage peaks are reduced.
  • the joints are connected by butt welding. This is done in a known manner such that the two ends of the curved cage are received with their abutments in clamping jaws made of copper and are pressed firmly against one another.
  • the heating occurs due to the electrical resistance of the cage, in particular due to the high resistance at the joints, which are combined under pressure after the welding temperature has been reached, with material liquefaction occurring at the joints.
  • the current is supplied directly via appropriate electrodes or inductively. After the welding temperature has been reached, the current is switched off and the upsetting pressure for welding is increased again.
  • the fusion welding should be carried out with or without filler material.
  • the filler materials are fed in rod or wire form and serve to fill the weld joint.
  • the filler material normally has the same composition as the base material of the cage and occasionally contains minor alloy additions to improve the flow or to achieve a particularly fine-grained weld structure.
  • the welding wires or rods are often still provided with special coatings which serve as fluxes, remove the existing oxides or other disruptive substances, improve the wettability of the workpiece surface, protect the welding points from external influences and prevent rapid cooling.
  • the fusion welding is carried out as electron beam or as laser beam welding.
  • beam welding the heat is generated by converting concentrated, high-energy radiation when it strikes or penetrates the workpiece.
  • the electron beam welding an electron beam controlled and sharply focused by electric or magnetic fields serves as a heat source and penetrates into the material due to the melting and evaporation of the metal.
  • laser beam welding the energy is generated with laser beams, ie with sharply focused light beams with a high energy density.
  • the cage produced by the method according to the invention is characterized in that a cross section welded in the area of the joints is at least 80% of a computationally possible cross section of the joints. This is an increase in the effective cross section compared to cages manufactured according to conventional welding processes, so that the strength of the cage is increased overall.
  • the joints of the cage should have a chamfer in the axial and / or radial direction. This means that the ends of the cage in the circumferential direction decrease in cross-section when merging. This ensures that the joints can be found better and easier when the cage ends are brought together and that there is a good possibility of receiving the welding material.
  • FIGS. 1 and 2 show a weld seam at the joints of a cage according to the invention
  • Figure 3 shows an axial section through a board of a cage in
  • Figure 4 is a perspective view of a chamfer
  • FIG. 7 shows a side ring or rim 1 of a cage, the ends 2 and 3 of which are connected by a weld 4 according to the prior art.
  • the weld seam 4 has a doughy or melted area 5, which is adjoined on both sides by an area 6 with a normalization structure, which is again delimited on both sides by an area 7 with a recrystallization structure.
  • the weld seam 4 is designed very irregularly, i. H. it has a welding bead 8, welding notches 9 and punch chamfers 10. A person skilled in the art knows that such an irregularly shaped weld seam 4 has a notch effect.
  • the irregularly shaped surface causes a disturbance in the flow of force in the board 1, which negatively affects the fatigue strength of the cage.
  • small notch radii mean a high number of shapes, this being defined by the ratio of maximum stress to nominal stress.
  • the shape number is a constant numerical value, regardless of the amount of stress and the material, which is primarily determined by the geometric shape, secondly by the type of stress.
  • FIGS. 5 and 6 show how a radial 11 and an axial offset 12 can occur at the ends 2 and 3 of the cage due to manufacturing inaccuracies.
  • This radial and axial offset 11, 12 affects the fatigue strength of the cage twice in a negative way.
  • the maximum possible connection cross section is reduced at the joints of the ends 2 and 3 and, on the other hand, this offset also makes the weld seam 4 irregular, ie it has a notching effect.
  • FIGS. 1 and 2 show the connection of cage ends 2 and 3 made of a steel material with the aid of a weld seam 13, which was subjected to additional fusion welding in the manner according to the invention after the actual connection welding.
  • This can be done in such a way that the connecting weld seam is taken over in an aggregate, the beads and folds of the butt weld resulting from melting and remelting giving a uniform weld ramp with milder notches.
  • FIGS. 1 and 2 with FIG. 7 shows, the imperfections have disappeared, i. H. the surface of the weld 13 is smoothed. The consequence of this is that the notch effect of the weld seam 13 is significantly reduced, so that harmful stress peaks which negatively influence the fatigue strength cannot occur.
  • FIG. 1 and 2 show the connection of cage ends 2 and 3 made of a steel material with the aid of a weld seam 13, which was subjected to additional fusion welding in the manner according to the invention after the actual connection welding.
  • the weld seam 13 is formed without the addition of filler material, while in FIG. 2 the weld seam 13 is formed with filler material. This can be seen from the fact that the weld seam in FIG. 2 is convex and that in FIG. 1 is concave.
  • FIG 3 the joint of the end 3 of board 1 is shown. If all manufacturing inaccuracies are eliminated and there is a theoretical one hundred percent welded joint, the maximum possible area a • b results in the area of the joint.
  • the hatched face 14 corresponds to the butt area according to the previous method and amounts to a maximum of 60% of the arithmetically possible area, while the butt face 15 is to be assigned to the weld seam 13 according to the invention and is composed of the hatched butt face 14 and the dotted part of the ellipse.
  • FIG. 4 shows one end of a rim 1, the abutting surface 16 of which has a chamfer 17 in the radial direction at the upper and lower ends.
  • the other bevels 17, which are also associated are formed with a triangular groove, which can advantageously accommodate the welding material to be added.

Abstract

L'invention concerne un procédé pour produire une cage destinée à un palier à roulement, comprenant deux bagues latérales (1) reliées par des éléments de liaison. Après découpage des poches, cette cage constituée d'une bande plate est cintrée de façon à présenter une forme cylindrique ou conique, puis soudée au niveau de ses joints (14, 15, 16). Ce procédé est caractérisé en ce que la cage, après le soudage d'assemblage, est soumise à un soudage supplémentaire par fusion dans la zone du cordon de soudure (4). Cette opération permet de réduire sensiblement l'effet d'entaille du cordon de soudure (13) et par conséquent d'améliorer la résistance de la cage aux efforts répétés.
PCT/EP2000/000417 1999-03-12 2000-01-20 Procede pour produire une cage destinee a un palier a roulement et cage ainsi obtenue WO2000055382A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10080504T DE10080504D2 (de) 1999-03-12 2000-01-20 Verfahren zur Herstellung eines Käfigs für ein Wälzlager und nach dem Verfahren Hergestellter Käfig

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19910928A DE19910928A1 (de) 1999-03-12 1999-03-12 Verfahren zur Herstellung eines Käfigs für ein Wälzlager und nach dem Verfahren hergestellter Käfig
DE19910928.1 1999-03-12

Publications (1)

Publication Number Publication Date
WO2000055382A1 true WO2000055382A1 (fr) 2000-09-21

Family

ID=7900647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/000417 WO2000055382A1 (fr) 1999-03-12 2000-01-20 Procede pour produire une cage destinee a un palier a roulement et cage ainsi obtenue

Country Status (2)

Country Link
DE (2) DE19910928A1 (fr)
WO (1) WO2000055382A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105003540A (zh) * 2006-03-10 2015-10-28 Ntn株式会社 衬垫

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DE102005014967A1 (de) * 2005-04-01 2006-10-05 Schaeffler Kg Geschweißter Wälzlagerring aus Wälzlagerstahl
DE102005044424A1 (de) * 2005-09-16 2007-04-05 Blanco Gmbh + Co Kg Verfahren zum Herstellen einer Schweißnaht
US20070248298A1 (en) * 2006-03-23 2007-10-25 Jtekt Corporation. Roller bearing cage, roller bearing, and method of producing roller bearing race and roller bearing outer ring
CN104094003A (zh) * 2012-02-14 2014-10-08 Skf公司 制作保持架的方法，保持架及滚动轴承
DE102013212992A1 (de) * 2013-07-03 2015-01-08 Aktiebolaget Skf Verfahren zur Herstellung eines Wälzlagerkäfigs
DE102013223957A1 (de) * 2013-11-22 2015-05-28 Siemens Aktiengesellschaft Auftragsschweißverfahren und Vorrichtung mit stangenförmigem Schweißzusatz-Werkstoff
DE102017001045A1 (de) 2017-02-02 2018-08-02 MPT Präzisionsteile GmbH Mittweida Wälzkörperführungskäfig aus zwei miteinander verbundenen Ringsegmenten mit axial angeordneten und beabstandeten Wälzkörperaufnahmen
DE102019201565A1 (de) 2019-02-07 2020-08-13 Aktiebolaget Skf Lagerkäfigsegment mit einer Stoßkante im Bereich eines zu bildenden Stegs
DE102019201553A1 (de) * 2019-02-07 2020-08-13 Aktiebolaget Skf Lagerkäfigsegment mit Ausrichtungselement
DE102019201561A1 (de) 2019-02-07 2020-08-13 Aktiebolaget Skf Lagerkäfigsegment eines Metallblechkäfigs
DE102019201560A1 (de) 2019-02-07 2020-08-13 Aktiebolaget Skf Lagerkäfigsegment mit Stoßkante zum Verschweißen
DE102019201554A1 (de) * 2019-02-07 2020-08-13 Aktiebolaget Skf Lagerkäfigsegment mit Schweißmaterialstelle
CN110039267A (zh) * 2019-05-28 2019-07-23 聊城市东昌府区嘉泰轴承保持器厂 一种风电转盘轴承耐磨材料球保持架整体式焊接工艺
CN110039268B (zh) * 2019-05-29 2020-07-14 浙江钱富万向节有限公司 冷挤高耐磨轴承外圈的加工方法
DE102021206282A1 (de) 2021-06-18 2022-12-22 Aktiebolaget Skf Käfigsegment für einen Wälzlagerkäfig
DE102021206285A1 (de) 2021-06-18 2022-12-22 Aktiebolaget Skf Käfigsegment für einen Wälzlagerkäfig

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GB1188712A (en) * 1966-04-23 1970-04-22 Sumitomo Metal Ind Improvements in or relating to Pressure-Welded Metallic Articles
DE1552099A1 (de) * 1965-03-23 1970-12-03 Torin Corp Verfahren zur Herstellung von Lagerkaefigen u.dgl.
GB1431612A (en) * 1973-06-22 1976-04-14 Schaeffler W Multirow rolling-bearing cage
US4079224A (en) * 1974-11-05 1978-03-14 Nippon Steel Corporation Method for preventing brittle fracture of steel pipe structures

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JPH07127646A (ja) * 1993-10-29 1995-05-16 Ntn Corp ころ軸受用保持器
DE19528506A1 (de) * 1995-08-03 1997-02-06 Schaeffler Waelzlager Kg Wälzlager

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE1552099A1 (de) * 1965-03-23 1970-12-03 Torin Corp Verfahren zur Herstellung von Lagerkaefigen u.dgl.
GB1188712A (en) * 1966-04-23 1970-04-22 Sumitomo Metal Ind Improvements in or relating to Pressure-Welded Metallic Articles
GB1431612A (en) * 1973-06-22 1976-04-14 Schaeffler W Multirow rolling-bearing cage
US4079224A (en) * 1974-11-05 1978-03-14 Nippon Steel Corporation Method for preventing brittle fracture of steel pipe structures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105003540A (zh) * 2006-03-10 2015-10-28 Ntn株式会社 衬垫
US9732734B2 (en) 2006-03-10 2017-08-15 Ntn Corporation Roller bearing, retainer segment, spacer and main shaft support structure of wind-power generator
US10190576B2 (en) 2006-03-10 2019-01-29 Ntn Corporation Roller bearing, retainer segment, spacer and main shaft support structure of wind-power generator

Also Published As

Publication number Publication date
DE10080504D2 (de) 2002-02-14
DE19910928A1 (de) 2000-09-14

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