GB2156449A - Forming a flange to provide a channel or groove - Google Patents

Forming a flange to provide a channel or groove Download PDF

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Publication number
GB2156449A
GB2156449A GB08507493A GB8507493A GB2156449A GB 2156449 A GB2156449 A GB 2156449A GB 08507493 A GB08507493 A GB 08507493A GB 8507493 A GB8507493 A GB 8507493A GB 2156449 A GB2156449 A GB 2156449A
Authority
GB
United Kingdom
Prior art keywords
flange
annular
groove
rest
channel
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.)
Granted
Application number
GB08507493A
Other versions
GB2156449B (en
GB8507493D0 (en
Inventor
Armin Olschewski
Bernhard Bauer
Elisabeth Zirk
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.)
SKF GmbH
Original Assignee
SKF 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 SKF GmbH filed Critical SKF GmbH
Publication of GB8507493D0 publication Critical patent/GB8507493D0/en
Publication of GB2156449A publication Critical patent/GB2156449A/en
Application granted granted Critical
Publication of GB2156449B publication Critical patent/GB2156449B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Forging (AREA)

Abstract

To provide a piece of sheet metal with a flange a part 14 including a free edge 13 of a flat portion 12 is offset perpendicular to the rest of the flat portion. The flat portion 12 is then subject to a bending operation forming the flange and providing a groove 17. <IMAGE>

Description

SPECIFICATION Forming a flange to provide a channel or groove This invention concerns forming a flange on a piece of sheet metal such as an inturned flange of a cylindrical sleeve, which flange forms part of a channel or groove.
Patent specification Dex 255994 discloses a needle roller bearing having an outer ring in the form of a cylindrical sleeve of sheet metal.
At one end, the sleeve extends radially inwardly, then axially towards the other end, and then radially outwardly towards the main cylindrical body of the sleeve. This latter part which extends radially outwardly, forms an abutment surface for the ends of the rollers.
This shaped end of the sleeve forms an annu lar groove in the interior of the main cylindri cal body of the sleeve. A groove such as this may be used to accomodate a seal or an element for securing or guiding. Also the groove can be provided on the outside of the main cylindrical body of the sleeve. The effect of the bending operations to provide this shaped end is that all the edges or corners are rounded. To provide sharp edged corners on this shaped end is difficult if not impossible.
However, as exemplified in the known design, many applications require an abutment surface having the greatest possible radial extent and yet within a closely defined space.
This means that as far as possible the entire radial surface of the inner flange is required to be available as an abutment surface without interfering or unusable rounded edges. When the inside surface of the inner flange is intended to be used as a securing surface it should extend only radially and only a short distance. To provide such a surface with a bending operation can be difficult if not impossible.
The subject of this invention is a method of forming a flange to provide a channel or groove, which method allows the formation of sharp edges or corners.
The invention provides a method of forming a flange to provide a channel or groove comprising providing a piece of sheet metal having a portion which is flat and includes a free edge, subjecting a part of this portion which part includes the free edge to an operation off setting that part in a direction perpendicular to the rest of the portion so forming a step with surfaces extending parallel to and spaced perpendicular from the flat surfaces of the rest of the portion, then subjecting the portion to a bending operation so that the said surfaces of the step are now spaced from and extend perpendicular to the flat sufaces of the rest of the portion, a channel or groove thus arising between the offset part and the rest of the flat portion.
The offsetting stage can be carried out using for example a stamping tool to provide relatively sharp edges between the step surfaces, the flat surfaces of the rest of the portion and those surfaces joining them.
The bending stage can be a conventional or known flanging operation to turn the step surfaces through 90 .
Preferably the piece of metal is a cylindrical sleeve and the portion is an annular radially extending flange at one end of the sleeve, the part is the annular periphery of the flange which includes the free circular edge of the flange and is subject to the first operation axially offsetting the periphery towards the other end of this sleeve and forming an annular step, and the annular flange is subject to the bending operation so that the said surfaces of the annular step became cylindrical surfaces.
The invention also includes a piece of sheet metal having a flange providing part of a channel or groove when formed by a method according to the invention.
An embodiment of the invention will now be described by way of example and with reference to the accompanying drawings, in which: Figure 1 is part of a longitudinal section through a cylindrical sheet metal sleeve having an annular radially inwardly extending flange at one end; Figure 2 is the same sleeve after an offsetting operation; and Figure 3 is the sleeve after a bending operation; Fig. 1 shows a sheet metal sleeve 10 having a main cylindrical body 11 and at one end an annular radially inwardly extending flat flange 12 with a free edge 13 in the form of a cylindrical surface. An annular peripheral part 14 of the flange 12 including the free edge 13, is subject to an operation which offsets this part 14 in an axial direction, perpendicular to the rest of the flange 12, towards the other end of the sleeve 20.The amount of offset is equal to approximately half of the thickness of the sheet metal, so that the part 14 is still securely connected to the rest of the flange 12. This offseting operation forms an annular step of the part 14 as shown in Fig. 2 with surfaces 15 and 16 of the step extending parallel to and being spaced perpendicular from the flat surfaces of th rest of the flange 12. The flat surfaces 15 and 16 of the annular step 14 and the flat surfaces of the rest of the flange 12 form sharp edges with the surfaces joining them.
In the next stage, the flange 12 is subject to a bending operation about a circular line spaced radially outwardly of this annular step 14 and spaced axially from the rest of the flange 12 towards the other end of the sleeve 10. The result of this operation is shown in Fig. 3 in which the annular step 14 is now a radially outwardly extending annular flange with the surfaces 15 and 16 now spaced from and extending perpendicular to the flat surfaces of the rest of the flange 12. The cylindrical free edge surface 13 is now a flat radially extending surface facing the other end of the sleeve 10 and bounded by sharp circular edges, and the surfaces 15 and 16 are now cylindrical surfaces disposed one inside the other. The annular flange 14 forms with the rest of the flange 12 an annular groove 17 having a base 18 and side walls 19 and 20. Because of the need to maintain a secure connection between the annular part 14 and the rest of the flange 12, the side wall 19 extends radially outwardly only a short distance. However, the offsetting operation provides a sharp transition between the side wall 19 and the base 18.

Claims (6)

1. A method of forming a flange to provide a channel or groove comprising providing a piece of sheet metal having a portion which is flat and includes a free edge, subjecting a part of this portion which part includes the free edge to an operation offsetting that part in a direction perpendicular to the rest of the portion so forming a step with surfaces extending parallel to and spaced perpendicular from the flat surfaces of the rest of the portion, then subjecting the portion to a bending operation so that the said surfaces of the step are now spaced from and extend perpendicular to the flat surfaces of the rest of the portion, a channel or groove thus arising between the offset part and the rest of the flat portion.
2. A method as claimed in claim 1, wherein the piece of metal is a cylindrical sleeve and the portion is an annular radially extending flange at one of the sleeve, the part is the annular periphery of the flange which includes the free circular edge of the flange and is subject to the first operation axially offsetting the periphery towards the other end of the sleeve and forming an annular step, and the annular flange is subject to the bending operation so that the said surfaces of the annular step become cylindrical surfaces.
3. A method of forming a flange to provide a channel or groove substantially as herein described with reference to and as shown in the accompanying drawings.
4. A piece of sheet metal having a flange providing part of a channel or groove when formed by a method as claimed in any preceding claims.
5. A method of producing a radially extending annular groove in the peripheral region of an annular disc, flange or the like by flanging over a radial edge zone, characterised in that firstly an annular edge portion of the radial edge zone is axially offset relative to the rest of the flange and, subsequently, the edge zone is flanged over into a substantially cylindrical shape.
6. A method according to claim 5, characterised in that the edge portion is offset along a circular shearing line by a relatively small amount in relation to the material thickness.
GB08507493A 1984-03-27 1985-03-22 Forming a flange to provide a channel or groove Expired GB2156449B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843411223 DE3411223A1 (en) 1984-03-27 1984-03-27 METHOD FOR PRODUCING A RINGNUT

Publications (3)

Publication Number Publication Date
GB8507493D0 GB8507493D0 (en) 1985-05-01
GB2156449A true GB2156449A (en) 1985-10-09
GB2156449B GB2156449B (en) 1987-08-19

Family

ID=6231738

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08507493A Expired GB2156449B (en) 1984-03-27 1985-03-22 Forming a flange to provide a channel or groove

Country Status (4)

Country Link
DE (1) DE3411223A1 (en)
FR (1) FR2561955A1 (en)
GB (1) GB2156449B (en)
IT (1) IT1184159B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075157A1 (en) * 2011-05-03 2012-11-08 Schaeffler Technologies AG & Co. KG Bearing ring for a radial roller bearing, in particular for a cylindrical roller or needle roller bearing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR956787A (en) * 1950-02-07
GB1026324A (en) * 1962-09-25 1966-04-20 Torrington Co Prestressed roller bearing
DE1255994B (en) * 1963-01-25 1967-12-07 Schaeffler Ohg Industriewerk Rolling bearings for cylindrical rolling elements
US3601458A (en) * 1969-11-03 1971-08-24 Srf Ind Inc Drawn crowned bearing shell
DE2017988A1 (en) * 1970-04-15 1971-10-28 Schaeffler Ohg Industriewerk Method for forming an approximately axially outward-facing collar at the end of a run-up rim of a non-cutting thin-walled outer race for roller bearings
DE2651845C2 (en) * 1976-11-13 1983-09-15 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Method for producing a radially open groove with a rectangular cross-section at the end of the inner or outer jacket surface of a tubular component

Also Published As

Publication number Publication date
DE3411223C2 (en) 1992-06-25
FR2561955A1 (en) 1985-10-04
GB2156449B (en) 1987-08-19
IT1184159B (en) 1987-10-22
GB8507493D0 (en) 1985-05-01
IT8519913A0 (en) 1985-03-14
DE3411223A1 (en) 1985-10-10

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PCNP Patent ceased through non-payment of renewal fee