US3667265A - Method for the fabrication of stiffening corrugations in thin-walled, hard sheets, especially of circumferential crease - Google Patents

Method for the fabrication of stiffening corrugations in thin-walled, hard sheets, especially of circumferential crease Download PDF

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Publication number
US3667265A
US3667265A US16229A US3667265DA US3667265A US 3667265 A US3667265 A US 3667265A US 16229 A US16229 A US 16229A US 3667265D A US3667265D A US 3667265DA US 3667265 A US3667265 A US 3667265A
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US
United States
Prior art keywords
roller
pressing
groove
rollers
thin
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Expired - Lifetime
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US16229A
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English (en)
Inventor
Gernot Zippe
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Gesellschaft fur Kernverfahrenstechnik mbH
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Kernverfahrenstechnik Gmbh
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    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly

Definitions

  • the method includes pressing a roof-shaped groove into the hard material within its limits of plastic deformation and then superimposing on the roller an oscillatory motion at right an- 1 gles to the groove for broadening the groove at right angles to its direction of extension.
  • the invention relates to a method for the production of beads in thin-walled hard sheet, especially of circumferential creases in rotors of centrifuges, by means of rollers and counter rollers as the forming tools accomodating between them the material to be worked.
  • centrifugal rotors of this type are made mostly of very high-strength material of low ductility, the familiar methods of impressing creases of this kind, e.g., hydraulic forming, raise certain difficulties because the material hardens too quickly and must be softened again, which requires expensive intermediate steps.
  • the present invention serves the purpose of creating a method for the production of creases or beads which permits the fabrication of these elastic intermediates at relatively simple expense and with accurately defined properties even in very hard, thin-walled materials. This is based on the familiar method of pressure rolling by means of rollers and counter rollers between which the material is passed.
  • the solution of the problem to which the invention is directed includes pressing a roof-shaped groove into the material within its limits of plastic deformation, which groove then is broadened at right angles to its direction of extension. For broadening, an oscillatory motion is superimposed on the rotary motion of the roller, at right angles to the groove. For forming out, it is useful to have the first roller followed by a second roller of the same effective forming height, but with a greater width.
  • the method according to the invention makes it possible to produce the desired creases wholly or partly in hardened material, in which case care must be taken not to exceed the residual plastic yield point when impressing the roof-shaped groove. Although this may require a larger number of steps and roller shapes in some cases compared with the forming of unhardened material, it makes for a considerable increase in strength as a result of cold working, which is desirable especially for centrifuge rotors.
  • FIGS. 1a, 1b, 1c, and 1d are schematic representations of the steps of the process with different pairs of rollers in each case.
  • FIG. 2 is a schematic representation of a multi-press rolling device for the production of circumferential creases in tubes.
  • Rollers 1 and 2 of FIG. 1a are pivoted around their axes 3, 4
  • Counter roller 2 has a depression 8 which is broader than its counterpart rim 9 of roller 1.
  • Roller l is movable perpendicular to its axis of rotation 3 so that it is possible initially to press a roof-shaped circumferential groove 10 into the tube 7 by means of the rim 9. In this step, the rim 9 acts roughly on the middle of the depression 8.
  • roller 1 is moved back and forth under pressure parallel to its axis of rotation 3. This oscillatory motion is indicated by the two arrows on either side of roller 1 in the right half of FIG. 1a.
  • FIGS. 1c and 1 d show the further steps of the process
  • the press rolling device according to FIG. 2 consists essentially of a rotary drive mechanism 20, 21, 22 for rotating the pressing rollers 23, 24. Rollers 23 and 24 are supported and braced by means of hollow shaft 21 and set bolt 22 which, in turn, are coupled with a rotary drive 20. In addition, the hollow shaft and set bolt are supported by track supporting rollers 27 at their free ends.
  • the pressing rollers 23, 24 can be moved perpendicular and also parallel to their axis by a pressing device (not shown) so that circumferential creases 29 are produced in the tube 28 to be worked.
  • the supporting and bracing device 21, 22 permits easy exchange of the rollers for the individual process steps. In order to save sets of rollers, it is possible to build the rollers out of several single disks which, depending upon the number of disks, permit e.g., a variation of the effective widths of the counter roller depression and pressing roller rim.
  • the invention is not limited to the example described. Thus, it can be employed under the same principle e.g., to press beads along tube surface lines or into plane sheet.
  • Method of production of beads in thin-walled hard sheet especially of circumferential creases in rotors of centrifuges, by means of a roller and a counter roller as the pressing tools which accomodate between them the material to be worked, comprising the steps of pressing a roof-shaped groove into the material within its limits of plastic deformation and then superimposing on the roller an oscillatory motion at right angles to the groove for broadening said groove at right angles to its direction of extension.
  • Method as claimed in claim 1 further comprising, after broadening, following the roller with a second roller the pressing rim of which is broader than that of the first roller for forming out the groove.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Centrifugal Separators (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
US16229A 1969-03-03 1970-03-03 Method for the fabrication of stiffening corrugations in thin-walled, hard sheets, especially of circumferential crease Expired - Lifetime US3667265A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT207369A AT285290B (de) 1969-03-03 1969-03-03 Verfahren und Vorrichtung zum Herstellen von Sicken in dünnwandigen, harten Blechen

Publications (1)

Publication Number Publication Date
US3667265A true US3667265A (en) 1972-06-06

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ID=3527190

Family Applications (1)

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US16229A Expired - Lifetime US3667265A (en) 1969-03-03 1970-03-03 Method for the fabrication of stiffening corrugations in thin-walled, hard sheets, especially of circumferential crease

Country Status (7)

Country Link
US (1) US3667265A (de)
AT (1) AT285290B (de)
CH (1) CH500782A (de)
DE (1) DE1965843A1 (de)
FR (1) FR2037151A1 (de)
GB (1) GB1299471A (de)
NL (1) NL7003008A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589177A (en) * 1982-02-25 1986-05-20 Teksid S.P.A. Method of manufacturing, without welding, light alloy rims for motor vehicles
US6217811B1 (en) * 1996-03-23 2001-04-17 Dr. Mirtsch Gmbh Process and apparatus for vault-structuring of thin material sheets
US6221299B1 (en) * 1996-04-18 2001-04-24 Frank Mirtsch Structuring process that stiffens and protects the surface of thin material webs
US6751995B1 (en) * 2002-08-09 2004-06-22 Steven W. Sabasta Roll bending die
US20070204754A1 (en) * 2006-03-06 2007-09-06 The Procter & Gamble Company Compliant embosser assembly
US20070214973A1 (en) * 2006-03-20 2007-09-20 Hook Jeremy F Compliant embosser assembly
US20080203239A1 (en) * 2007-02-22 2008-08-28 Mack Deichman Arcuate saddle with partial ribs and methods of manufacture
US20100139080A1 (en) * 2008-12-05 2010-06-10 Baum Jr Ted Metal Simulated Log Siding Panel With Hew Lines And Method Of Making And Using Same
CN102989852A (zh) * 2012-12-14 2013-03-27 淄博永华滤清器制造有限公司 自动辊筋机
CN110087789A (zh) * 2016-12-15 2019-08-02 中压管道技术有限公司 用于在金属管道的端部部段中产生环绕的槽的设备和方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2731965A1 (de) * 1977-07-15 1979-02-01 Peter Loeser Verfahren zum verformen, insbesondere heissverformen von rohrfoermigen werkstuecken und vorrichtung zur durchfuehrung des verfahrens
DE102010008514B4 (de) * 2010-02-18 2013-01-03 Jovan Lazar Vorrichtung zur Montage von Abdeckungen an Kaminen oder Abzügen
DE102015005875A1 (de) * 2015-05-11 2016-11-17 Max Simmel Produktions GmbH Verfahren zum Rollieren von tiefliegenden Profilen in langen Hohlkörpern mit kleinem Durchmesser
CN111822568A (zh) * 2020-06-01 2020-10-27 成都焊科机器人有限公司 一种油箱内隔板12条筋同时成型的冲筋装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844469A (en) * 1928-07-18 1932-02-09 Fulton Sylphon Co Method of making tubular metallic bellows
FR867034A (fr) * 1940-05-24 1941-09-23 Procédé et machine de transformation de tôles planes en tôles ondulées

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844469A (en) * 1928-07-18 1932-02-09 Fulton Sylphon Co Method of making tubular metallic bellows
FR867034A (fr) * 1940-05-24 1941-09-23 Procédé et machine de transformation de tôles planes en tôles ondulées

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589177A (en) * 1982-02-25 1986-05-20 Teksid S.P.A. Method of manufacturing, without welding, light alloy rims for motor vehicles
US6217811B1 (en) * 1996-03-23 2001-04-17 Dr. Mirtsch Gmbh Process and apparatus for vault-structuring of thin material sheets
US6221299B1 (en) * 1996-04-18 2001-04-24 Frank Mirtsch Structuring process that stiffens and protects the surface of thin material webs
US6751995B1 (en) * 2002-08-09 2004-06-22 Steven W. Sabasta Roll bending die
US20070204754A1 (en) * 2006-03-06 2007-09-06 The Procter & Gamble Company Compliant embosser assembly
US8616125B2 (en) * 2006-03-20 2013-12-31 The Procter & Gamble Company Compliant embosser assembly
US20070214973A1 (en) * 2006-03-20 2007-09-20 Hook Jeremy F Compliant embosser assembly
US20080203239A1 (en) * 2007-02-22 2008-08-28 Mack Deichman Arcuate saddle with partial ribs and methods of manufacture
US7677505B2 (en) 2007-02-22 2010-03-16 Mack Deichman Arcuate saddle with partial ribs
US20100140420A1 (en) * 2007-02-22 2010-06-10 Mack Deichman Arcuate saddle with partial ribs and methods of manufacture
US8038105B2 (en) 2007-02-22 2011-10-18 Buckaroos, Inc. Arcuate saddle with partial ribs and methods of manufacture
US20100139080A1 (en) * 2008-12-05 2010-06-10 Baum Jr Ted Metal Simulated Log Siding Panel With Hew Lines And Method Of Making And Using Same
US9283604B2 (en) * 2008-12-05 2016-03-15 Ted Baum, Jr. Metal simulated log siding panel with hew lines and method of making and using same
CN102989852A (zh) * 2012-12-14 2013-03-27 淄博永华滤清器制造有限公司 自动辊筋机
CN110087789A (zh) * 2016-12-15 2019-08-02 中压管道技术有限公司 用于在金属管道的端部部段中产生环绕的槽的设备和方法
US11975374B2 (en) 2016-12-15 2024-05-07 Mv Pipe Technologies Gmbh Apparatus and method for producing a peripheral groove in an end portion of a metal tube

Also Published As

Publication number Publication date
CH500782A (de) 1970-12-31
AT285290B (de) 1970-10-27
NL7003008A (de) 1970-09-07
FR2037151A1 (fr) 1970-12-31
DE1965843A1 (de) 1970-09-10
GB1299471A (en) 1972-12-13

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