GB1568676A - Process for making a metal annular blank - Google Patents

Process for making a metal annular blank Download PDF

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Publication number
GB1568676A
GB1568676A GB1498279A GB1498279A GB1568676A GB 1568676 A GB1568676 A GB 1568676A GB 1498279 A GB1498279 A GB 1498279A GB 1498279 A GB1498279 A GB 1498279A GB 1568676 A GB1568676 A GB 1568676A
Authority
GB
United Kingdom
Prior art keywords
sheet metal
rollers
metal
annular blank
making
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
Application number
GB1498279A
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.)
Aerojet Rocketdyne Holdings Inc
Original Assignee
General Tire and Rubber Co
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 General Tire and Rubber Co filed Critical General Tire and Rubber Co
Publication of GB1568676A publication Critical patent/GB1568676A/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00Application of procedures in order to alter the diameter of tube ends
    • B21D41/02Enlarging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00Flanging or other edge treatment, e.g. of tubes
    • B21D19/08Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/02Making hollow objects characterised by the structure of the objects
    • B21D51/10Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

PATENT SPECIFICATION
( 11) 1 568 676 ( 21) Applicatioh No 14982/79 ( 22) Filed 7 Oct 1976 ( 19) ( 62) Divided Out of No 1 568 675 t 31) Convention Application Nos 622 269 ( 32) Filed 14 Oct 1975 691 720 1 June 1976 in ( 33) United States of America (US)I ( 44) Complete Specification published 4 June 1980 ( 51 i) INT CL " B 21 D 53/16 ( 52) Index at acceptance B 3 A 122 J 85 ( 54) PROCESS FOR MAKING A METAL ANNULAR BLANK ( 71) We, THE GENERAL TIRE & R UnBE Rt COMPANY, a corporation organized and existing under the laws of the State of Ohio, of One General Street, Akron, Ohio, United States of America, do hereby deelare this invention for which we pray that a patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the fol-
lowing statement:-
This invention relates to a process for making a metal annular blank having a desired surface finish, and to blanks made by the process.
IS Suspension systems, particularly those suspension systems found in automotive applications make substantial use of devices commonly known as bushings.
Generally, these bushings consist of at least two more or less concentric annular mfnembers, usually of metal, separated by a rubber element of specific design which element is under compression Such devices are sometimes called outer and inner metals or "outers" and "inners" and are more fully described in, for example, U S Patent Nos 3,893,7 '75; 3,495,859; and 3,199,186.
In certain bushings it is desirable or necessary that the surface of the outer or inner which contacts the rubber element be so configured or finished as to grip the rubber element so as to eliminate or reduce slippage therebetween One prior art procedure for preventing relative movement between the metal sleeves and the elastomerlc insert is disclosed in Sievers patent 893,775 and involves sandblasting the surfaces of the metal sleeves and thereafter formning a phosphate coating thereon It O is desirable that improved means be provided for forming a rough gripping surface on the metal sleeves of the bushing It is desirable that better control over the precise form of the surface texture be provided and that this be accomplished inexpensively Other prior art related to this feature are U S patents 1,94 O,302 to Huumphre; 1,959,256 to Zerk: 2,725,692 to Andreae; 2,819,105 to Belinke; 3 368,852 to Hlerbenar; and 3,504,513 to Black.
Our patent application No 41,771/76 (Serial No 1,568,675) of which this application is a divisional describes and claims processes and apparatus for die forming annular metal blanks, e g blanks made ac 55 cording to the present invention.
According to the present invention, there is provided a process for making a metal annular blank which comprises moving flat sheet metal between a pair of parallel rollers 60 which are maintained in spaced relation to one another and roll against the sheet metal and are shaped to deform both surfaces of the sheet metal into a desired surface texture, skelping the sheet metal, and connect 65 ing opposite edges thereof to form a tubu lar sheet metal member.
Embodiments of the invention will now be described by way of example with reference to the accompanying drawings, in 70 which: Figure 1 is a schematic perspective view of a surface preparation procedure embodying the present invention; Figures 2 and 3 are perspective views of 75 an annular blank and a shaped annular member having a surface treatment provided according to the present invention; Figure 4 is a fragmentary perspective view of an annular member having an em 80 bossed grid configuration provided by a process embodying the invention on its surface; Figure 5 is an enlarged fragmentary cross section of the sheet metal 205 after 85 it has passed through the rollers 2 { 1 of Figure 1; Figure 6 is an enlarged fragmentary 'crosssection of the rollers 201 of Figure 1, showing the surface configuration thereof; and 90 Figure 7 is a schematic side elevation of a tube mill having a surface texturing device for applying surface texturing according to the present invention combined therewith 95 Referring to Figure 1, there is illustrated a coil 200 of sheet metal which is drawn through rollers 201 by suitable drive means (not shown) The rollers 201 and the drive means may be a part of a conventional 100 1,568,676 reduction mill, the usual function of which is to reduce the thickness of sheet material down to precise thickness The rollers 201 may be a part of a tube mill which forms sheet into tube The rollers 201 have longitudinal grooves 202 and projections 203 (see Fig 6) in their external surfaces, which are forced into the sheet metal 205 as the rollers rotate and the sheet metal moves through the rollers producing longitudinal projections 208 and grooves 206 respectively (see Fig 5) in the sheet metal 205 These longitudinal projections and grooves remain in the sheet metal as it is formed and welded into the tubular configuration 207 by a longitudinal butted joint 210.
Annular blanks such as the blank 211 of Figure 2 are obtained from the tubular member 207 The blank 211 can be shaped into the formed annular member 212 of Fig.
3 by for example the procedure described in application No 41,771/76 (Serial No.
1,568,675) Prior to curling the flat sheet 205 into the tubular configuration 207, it may be necessary to trim the edges of the sheet metal so that the tube has the proper diameter On the other hand, even in a reduction mill the reduction in thickness of the sheet metal normally results in a lengthening rather than a widening thereof.
The rollers 201 in one specific embodiment of the invention are designed as an attachment or addition to operate on the sheet metal before it moves into an existing tube mill In designing new tube mills or reduction mills, the rollers 201 can be incorporated into the design of the mill so that the rollers have a double function of reduction to a precise thickness as well as surface texturing.
Figure 5 shows in detail the cross-sectional configuration of the sheet metal after it has passed between the rollers 201 This is one typical texturing which the invention can provide, and the depth, width and configuration of the grooves may vary to provide the result desired; however, in one specific embodiment the grooves 206 are 0060 inches in width and between 0002 and 0005 inches in depth and the projections are of the same width Figure 6 shows in cross-section the die configuration used to produce the surface configuration of Figure 5 This die configuration is constant in cross-section circumferentially It should be understood that the rolls 201 are fixed in a spaced relationship which is the thickness desired for the sheet metal 205.
If the sheet metal from the coil 200 is thicker than the spacing, a substantial force must be exerted on the sheet metal by the rolls 201 which might be, for example, of the order of 50 Tons and can be calculated given the various parameters of the metal.
Thus the structure which holds the rolls in a spaced relationship should be capable of resisting this force.
In some designs of bushings, it is desirable or necessary that there is resistance to 70 slippage between the inner and outer metal sleeves and the elastomeric insert in both the rotary and axial directions, in which case the surface configuration of Figure 4 is desirable The sheet metal 215 has sur 75 faces raised in the form of grids 216, one on each side, including a series of square recesses 217 which are produced by rollers identical to 201 except that their external configuration is not constant in cross-sec 80 tion circumferentially but instead includes a series of projections of mating configuration to the recesses in the surface of the sheet metal 215 Thus Figure 6 is also an appropriate cross-sectional representation 85 for the regions of the rollers which produce the configuration of Figure 4.
Figure 7 shows in more detail a tube mill having means for performing the present invention incorporated therein A stan 90 dard uncoiler 225, which might be, for example, a Single Coil Cradle manufactured by McKay Division of Wean Industries of Youngstown, Ohio, uncoils the sheet metal and feeds it into a standard strip splicer 95 226 and collector unit which might be, for example, an MPM strip joining shear welder made by the same company and including an accumulator 227 The rollers 201 of Figure 1 are represented in Figure 7 by 100 rollers 230 and 231 The roller 230 is driven and rotatable, and its axis is fixed.
The roller 231 is vertically adjustable by the hydraulic motor 228, but its axis can be fixed in a desired spaced relationship to 105 the roller 230 by the frame 229 The surfaces of the rollers 230 and 231 have the appropriate configuration to produce the texturing desired 206 or 216 or any other desired texturing such as, for example, an 110 nular lines, diagonal cross hatch or diamond design patterns, longitudinal parallel waved lines, and/or a simulated phosphated surface The structure 228-231 will not be described in greater detail because it is a 115 standard cold reduction mill except for the particular surface of the rollers 230 and 231 An example of such a cold reduction mill is a Fenn Rolling Mill manufactured and sold by Fenn Manufacturing Company 120 of Newington, Connecticut.
The large loop 235 of sheet metal is used to control the relative speed of the driven roll 230 and the tube mill 236 Two electric eyes, not shown, are located one 125 above and one below the loop 235 and function to slow down or speed up the roll 230 The tube mill 236 is, for example, a 400 series McKay Tube Mill with cut off also manufactured by McKay Division of 130 z 1,568,676 Wean Industries The function of the tube mill and welder is to gradually skelp the sheet metal until the opposite edges thereof meet whereupon they are welded together.
While the invention has been illustrated and described in detail in the drawings and foregoing description, the same are to be considered as illustrative and not restrictive in character.

Claims (4)

WHAT WE CLAIM IS:-
1 A process for making a metal annular blank which comprises moving flat sheet metal between a pair of parallel rollers which are maintained in spaced relation to one another and roll against the sheet metal and are shaped to deform both surfaces of the sheet metal into a desired surface texture, skelping the sheet metal and connecting opposite edges thereof to form a tubular sheet metal member.
2 A process according to claim 1, wherein said rollers have a constant crosssection circumferentially and are configured to produce grooves in said sheet metal.
3 A process according to claim 1, wherein said rollers are configured to produce a plurality of recesses separated by a raised grid pattern in said sheet metal.
4 A process for making a metal annular blank substantially as any herein described with reference to the accompanying drawings.
A metal annular blank produced by a process according to any one of the preceding claims.
MEWBURN ELLIS & CO, Chartered Patent Agents, 70-72 Chancery Lane, London WC 2 A l AD.
Agents for the Applicants.
Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon), Ltd -1980.
Published at The Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
3 '
GB1498279A 1975-10-14 1976-10-07 Process for making a metal annular blank Expired GB1568676A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62226975A 1975-10-14 1975-10-14
US69172076A 1976-06-01 1976-06-01

Publications (1)

Publication Number Publication Date
GB1568676A true GB1568676A (en) 1980-06-04

Family

ID=27089168

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1498279A Expired GB1568676A (en) 1975-10-14 1976-10-07 Process for making a metal annular blank
GB4177176A Expired GB1568675A (en) 1975-10-14 1976-10-07 Method and apparatus for making metal annular members

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4177176A Expired GB1568675A (en) 1975-10-14 1976-10-07 Method and apparatus for making metal annular members

Country Status (10)

Country Link
JP (1) JPS5249969A (en)
AU (1) AU508952B2 (en)
BR (1) BR7606866A (en)
CA (1) CA1059839A (en)
DE (1) DE2646502C2 (en)
ES (2) ES450061A1 (en)
FR (1) FR2327831A1 (en)
GB (2) GB1568676A (en)
MX (1) MX144067A (en)
SE (2) SE416895B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627750A (en) * 1979-08-02 1981-03-18 Agency Of Ind Science & Technol Machining method by swaging and cutting
JPS63156693U (en) * 1987-03-31 1988-10-14
JP3027581B1 (en) * 1999-06-21 2000-04-04 株式会社三五 Pipe material expansion processing method and pipe material expansion processing device
FR2870196B1 (en) * 2004-05-17 2006-08-04 Auto Chassis Internat Snc Snc METHOD AND DEVICE FOR MANUFACTURING A CRADLE OF A VEHICLE COMPRISING AT LEAST ONE EVASIVE BUSH FOR RECEIVING A CORRESPONDING FILTERING PLATE, CRADLE AND VEHICLE
DE102007048039A1 (en) * 2007-10-05 2009-04-09 Saint-Gobain Performance Plastics Pampus Gmbh Flange tool for producing axial flange on bush i.e. slide bearing bush, has socket forming axial flange and partially surrounding shoulder of plunger, where shoulder is axially movable in socket and is coupled with socket by force spring
JP6528165B2 (en) * 2015-07-31 2019-06-12 トヨタ紡織株式会社 Vehicle seat frame and method of manufacturing the same
DE102017117400A1 (en) * 2017-08-01 2019-02-07 Liebherr-Aerospace Lindenberg Gmbh Device for installing and / or forming bushings

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE390392C (en) * 1924-02-18 Henry Heinzelman Timken Process and device for the production of tapered rings for roller and ball bearings
DE608041C (en) * 1932-06-03 1935-01-18 Polte Fa Device for pulling in or calibrating hollow bodies, in particular gun shells
US3263477A (en) * 1965-04-28 1966-08-02 Wallace Expanding Machines Apparatus for forming metallic ring members
US3368852A (en) * 1965-10-24 1968-02-13 Trw Inc Pin-type bushing assembly
JPS525311B2 (en) * 1973-01-19 1977-02-12
DE2406460A1 (en) * 1974-02-11 1975-08-14 Glyco Metall Werke BUSHING, IN PARTICULAR SLIDING BEARINGS OR HOUSING BUSHING WITH A SHAPED, NARROW COLLAR WITH ANY COLLAR THICKNESS, AS WELL AS THE PROCESS AND DEVICE FOR THEIR PRODUCTION

Also Published As

Publication number Publication date
GB1568675A (en) 1980-06-04
FR2327831A1 (en) 1977-05-13
FR2327831B1 (en) 1979-04-06
ES461038A1 (en) 1979-06-01
DE2646502C2 (en) 1983-08-11
MX144067A (en) 1981-08-26
BR7606866A (en) 1977-08-30
SE7906902L (en) 1979-08-17
AU508952B2 (en) 1980-04-17
SE416895B (en) 1981-02-16
ES450061A1 (en) 1977-11-16
SE7611447L (en) 1977-04-15
DE2646502A1 (en) 1977-04-21
JPS626888B2 (en) 1987-02-14
AU1736276A (en) 1978-03-09
JPS5249969A (en) 1977-04-21
CA1059839A (en) 1979-08-07

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee