US1041176A - Method of bending pipes. - Google Patents

Method of bending pipes. Download PDF

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Publication number
US1041176A
US1041176A US68819612A US1912688196A US1041176A US 1041176 A US1041176 A US 1041176A US 68819612 A US68819612 A US 68819612A US 1912688196 A US1912688196 A US 1912688196A US 1041176 A US1041176 A US 1041176A
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United States
Prior art keywords
tube
bar
bending
melting point
bending pipes
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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
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US68819612A
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Moritz Schitzkowsky
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Individual
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Priority to US68819612A priority Critical patent/US1041176A/en
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Classifications

    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material

Definitions

  • the process is as follows: At the point where the tube is to be bent, there is introduced a copper bar previously softened, or other metal suitable for the purpose, of a cross-section corresponding to the tube, and of the length corresponding to that of the proposed bend.
  • the tube is then heated at the bending point by an acetylene or gas flame or by means of coke, to a dark red heat and then bent in a suitable way, for instance by a device with a templet and two rolls. After the bending operation, the bond is heated to white heat, whereby the metal bar inclosed therein is melted and collected.
  • the medium is introduced into the tube while in a cold state and in the form of a solid bar having a diameter equal to the innerdiameter of the tube and that the melting point of this bar is above the temperature of the red incandescence point of the iron or steel tube but below the welding and melting temperatures of the said materials.
  • a copper bar previously softened fulfils these requirements.
  • This bar also fulfils the further obvious requirement, namely, that it shall present sufficient resistance against pressure so as not to be distorted or compressed in the act of bending the tube while the tube is heated to red incandescence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

MORITZ SCHITZKOWSKY. 0F DUSSELDORF, GERMANY.
METHOD OF BENDING PIPES.
No Drawing.
Specification of Letters Patent.
Patented Oct. 15, 1912.
Application filed April 3, 1912. Serial No. 688,196.
To all whom it may concern:
Be it known that I, Monrrz SOHITZKOWSKY, working manager, a citizen of the German Empire, residing at Dusseldorf, Germany, have invented certain new and useful Improvements in or Relating to Methods of Bending Pipes, of which the following is a specification.
The process is as follows: At the point where the tube is to be bent, there is introduced a copper bar previously softened, or other metal suitable for the purpose, of a cross-section corresponding to the tube, and of the length corresponding to that of the proposed bend. The tube is then heated at the bending point by an acetylene or gas flame or by means of coke, to a dark red heat and then bent in a suitable way, for instance by a device with a templet and two rolls. After the bending operation, the bond is heated to white heat, whereby the metal bar inclosed therein is melted and collected.
By means of this process, the cross-section of the pipe or tube is not reduced at the bend.
It will be observed that it is an essential feature of my process that the medium is introduced into the tube while in a cold state and in the form of a solid bar having a diameter equal to the innerdiameter of the tube and that the melting point of this bar is above the temperature of the red incandescence point of the iron or steel tube but below the welding and melting temperatures of the said materials. A copper bar previously softened fulfils these requirements. This bar also fulfils the further obvious requirement, namely, that it shall present sufficient resistance against pressure so as not to be distorted or compressed in the act of bending the tube while the tube is heated to red incandescence.
Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. The process herein described of bending a metal tube consisting in inserting a bar of metal in the tube, said bar having a cross section corresponding to the interior of the tube and a length corresponding approximately to that of the proposed bend and further having a melting point above that 'of the bending temperature of the tube but below the melting point of the tube, then heating the tube and the core bar to bending temperature and bending the tube and core and finally heating the tube and the bar to the melting point of the bar to thereby melt out the bar.
2. The process herein described of bending a metal tube consisting in inserting a bar of metal in the tube, said bar having a cross section corresponding to the interior of the tube and a length corresponding approximately to that of the proposed bend and further having a melting point above that of the bending temperature of the tube but below the melting point of the tube, then heating the tube and the core bar to bending temperature and bending the tube and core and finally heating the tube and the bar to the melting point of the bar to thereby melt out the bar, said bar consisting of softened copper.
In testimony whereof I hereunto affix my signature in presence of two witnesses.
MORITZ SGHITZKOWSKY.
Witnesses E. FALIRG,
M. BAERENS.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.
US68819612A 1912-04-03 1912-04-03 Method of bending pipes. Expired - Lifetime US1041176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US68819612A US1041176A (en) 1912-04-03 1912-04-03 Method of bending pipes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68819612A US1041176A (en) 1912-04-03 1912-04-03 Method of bending pipes.

Publications (1)

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US1041176A true US1041176A (en) 1912-10-15

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Family Applications (1)

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US68819612A Expired - Lifetime US1041176A (en) 1912-04-03 1912-04-03 Method of bending pipes.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451442A (en) * 1946-03-21 1948-10-12 Budd Co Method of spot welding hollow sections
US2961758A (en) * 1952-01-16 1960-11-29 Owens Corning Fiberglass Corp Method of making a metal element
US20060101890A1 (en) * 2004-11-15 2006-05-18 Min-Ju Chung Method for twisting a hollow metal tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451442A (en) * 1946-03-21 1948-10-12 Budd Co Method of spot welding hollow sections
US2961758A (en) * 1952-01-16 1960-11-29 Owens Corning Fiberglass Corp Method of making a metal element
US20060101890A1 (en) * 2004-11-15 2006-05-18 Min-Ju Chung Method for twisting a hollow metal tube

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