US2010400A - Method of manufacturing tubes and pipes - Google Patents

Method of manufacturing tubes and pipes Download PDF

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Publication number
US2010400A
US2010400A US594127A US59412732A US2010400A US 2010400 A US2010400 A US 2010400A US 594127 A US594127 A US 594127A US 59412732 A US59412732 A US 59412732A US 2010400 A US2010400 A US 2010400A
Authority
US
United States
Prior art keywords
mandrel
blank
thickening
thickened
pipes
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 - Lifetime
Application number
US594127A
Other languages
English (en)
Inventor
Klein Ludwig
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.)
Vereinigte Stahlwerke AG
Original Assignee
Vereinigte Stahlwerke AG
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 Vereinigte Stahlwerke AG filed Critical Vereinigte Stahlwerke AG
Application granted granted Critical
Publication of US2010400A publication Critical patent/US2010400A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12292—Workpiece with longitudinal passageway or stopweld material [e.g., for tubular stock, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness

Definitions

  • 1,898,779 relates to a method of producing tubes and pipes with internally thickened ends by the pilgering process with the aid of a mandrel having an offset, the main feature being that while the thickened tube ,end is being rolled out over the oiset portion of the mandrel and during the time in which the rolls in rolling out the material over the part of the mandrel of normal thickness are still opera.- tive at the offset part of the mandrel, the material is expanded rearwards.
  • the object of the present invention is to apply this method to the manufacture of tubes and pipes of a desired length which have not only 1,. thickened ends, but have in general local inwardly extending thickenings at desired points.
  • Such pipes are used for instance as columns and generally in vall cases where a pipe having a smooth cylindrical external surface must at certain places 20 have a thickened cross-section for considerations of strength or for other reasons.
  • the invention relates moreover to tubes and pipes of a desired length which have local inwardly extending thickenings manufactured by the pilgering process with the aid of a mandrel having an offset portion, wherein said thickenings can be formed at desired and predetermined points along the inside of the tube or pipe, and independent of the length of the same such as to pro-l 30 cute tubes or pipes of a desired length with a desired number of said internal thickenings in desired spaces.
  • the invention comprises the finished tube or pipe of a desired length which is provided at its one end and at predetermined points along its inside with local inwardly extending thickenings and at its other end with an outwardly extending thickening.
  • the method according to the invention is also suitable for the manufacture of tubular rods with inwardly thickened ends when the tubes are to be made not in single but in double or multiple lengths.
  • the manufacture of tubes of a desired length with local inwardly extending thickenings at desired points is carried out according to the invention by the tubular blank being rolled down on the thicker part of a mandrel having an'oiiset end until a place which is to be thickened internally is reached, thereupon moving longitudinally and u securing the blank in place with respect to the mandrel in such a position that the material for producing the thickening encloses the offset end portion of the mandrel, and then rolling down the thickened part of the blank on said oilset portion. After this rolling down cf the thickening the work piece may be released on the mandrel for enabling the blank to be further rolled down.
  • a bridging piece is placed over the exposed portion of the part of the mandrel of normal thickness, which bears at both ends agailnst a stripping ring and an auxiliary ring respectively. After the thickening has beenl rolled the bridging piece is removed for enabling the next part of the tube of normal cross-section to be rolled down.
  • Fig. l of which Fig. la represents a section along y-y
  • the tubular blank a is provided at its forward end in accordance with the method described lin my said prior patent with an inwardly extending thickening and has been rolled down next to this thickening over a certain length to the normal tubular'cross-section.
  • the blank is held with respect to the mandrel in such a position that the material required for producing the thickening is over tion, the bridging piece d has been removed.
  • a method of manufacturing a tube or pipe having local inwardly extending thickenings at desired points consisting in rolling down a tubular blank on the thicker part of a mandrel having an offset end smaller than its other portions until a place which is to be thickened internally is reached, thereupon moving longitudinally and securing the blank in place with respect to the mandrel in such a position that the material for producing the thickening encloses the oiset end portion of the mandrel, and then rolling down.
  • the thickened part ici the blank on said offset end portion, as set forth.
  • a method of manufacturing tubes and pipes of a desired length with' local inwardly extending thickenings atA desired points consisting in rolling down a tubular blank on the thicker part of a mandrel having a smaller offset portion until a place is reached which is to be thickened internally, thereupon moving the blank or mandrel longitudinally with respect the one to the other andl securing the blank with respect to the mandrel in such a position that the material for producing the thickening encloses the smaller offset portion of the mandrel, then rolling down the thickened part of the blank onto said offset and releasing the blank with respect to the mandrel for enabling the blank to be further moved longitudinally and rolled down, as and for the purpose set forth.
  • A. method of manufacturing a tube or pipe having local inwardly extending thickenings at de'sired points consisting in rolling down a tubular blank which has been constricted near its front end on the smaller offset end portion of a mandrel so as to produce an inner end thickening of the blank, thereupon rolling out the blank on the thicker part of the mandrel until a place is reached which.
  • a tube or pipe of a desired length being provided at its one end and at predetermined LUDWG KLEIN.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
US594127A 1931-05-11 1932-02-19 Method of manufacturing tubes and pipes Expired - Lifetime US2010400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE389262X 1931-05-11

Publications (1)

Publication Number Publication Date
US2010400A true US2010400A (en) 1935-08-06

Family

ID=6371386

Family Applications (1)

Application Number Title Priority Date Filing Date
US594127A Expired - Lifetime US2010400A (en) 1931-05-11 1932-02-19 Method of manufacturing tubes and pipes

Country Status (3)

Country Link
US (1) US2010400A (en)van)
BE (1) BE385999A (en)van)
GB (1) GB389262A (en)van)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181329A (en) * 1963-10-08 1965-05-04 Lodge & Shipley Co Method of forming ribbed tubes
US4571970A (en) * 1981-09-14 1986-02-25 Kocks Technik Gmbh & Co. Rolling mill plant for the manufacture of seamless tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181329A (en) * 1963-10-08 1965-05-04 Lodge & Shipley Co Method of forming ribbed tubes
US4571970A (en) * 1981-09-14 1986-02-25 Kocks Technik Gmbh & Co. Rolling mill plant for the manufacture of seamless tubes

Also Published As

Publication number Publication date
GB389262A (en) 1933-03-16
BE385999A (en)van)

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