WO2014112865A1 - Procédé de production d'un tuyau monobloc possédant une combinaison de coupes transversales carrée et circulaire - Google Patents

Procédé de production d'un tuyau monobloc possédant une combinaison de coupes transversales carrée et circulaire Download PDF

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Publication number
WO2014112865A1
WO2014112865A1 PCT/MY2014/000008 MY2014000008W WO2014112865A1 WO 2014112865 A1 WO2014112865 A1 WO 2014112865A1 MY 2014000008 W MY2014000008 W MY 2014000008W WO 2014112865 A1 WO2014112865 A1 WO 2014112865A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
square
circular cross
section
combination
Prior art date
Application number
PCT/MY2014/000008
Other languages
English (en)
Inventor
Chin Joo TAN
Azuddin BIN MAMAT
Original Assignee
Universiti Malaya
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 Universiti Malaya filed Critical Universiti Malaya
Publication of WO2014112865A1 publication Critical patent/WO2014112865A1/fr

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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/14—Joints for pipes of different diameters or cross-section

Definitions

  • the present invention generally relates to pipes but more particularly to a method of producing a unitary pipe having a combination of square and circular cross sections, hereinafter referred to as combination pipe, for brevity.
  • the known means of producing or manufacturing pipe or elongated hollow forms by extrusion process normally yield a product with uniform cross section along its entire length.
  • a practical person or maker may combine a segment of a pipe having a square cross section and another segment of a pipe having a circular cross section, and heat-weld them at their adjoining ends.
  • the aforesaid manner of joining the pipe segments could effect a weak connection considering that the welding procedure will be limited at the external or exposed surface area, thereby leaving a weak spot within the internal or hidden portion of the connection.
  • the aforesaid manner or means of producing the combination pipe may result to a poor quality product that may not be able to withstand load-bearing and dynamic applications.
  • the aforesaid means to produce the combination pipe normally requires a series of procedures consisting of cutting segments from pipes of different cross sections, holding in place the segments, heat-welding the adjoining ends of the segments, and grinding off the rough welded connection of the combination pipe, thus, making production limited and costly in terms of man-hours involved.
  • Another object of the present invention is to provide a method of producing a combination pipe that is easy to perform or practice, thereby facilitating mass production and insuring lower cost per piece or unit.
  • a time and attendance recording method comprising providing a method of producing a unitary pipe having a combination of square and circular cross sections comprising the steps of securely clamping a workpiece or a pipe having a square cross section to a workpiece grip of a lathe machine; spinning the securely clamped workpiece according to a predetermined spinning speed by operating the lathe machine; heating up a predetermined portion of the workpiece with a heating torch; extinguishing the heating torch once the required maximum temperature is reached; pressing a roller having a flat rim against the heated portion of the workpiece to gradually transform its square cross section into a circular cross section; and pressing the transformed portion with a roller having a round rim when the workpiece is at a predetermined lower temperature to produce a rounded common spot of the square cross section and the transformed circular cross section.
  • a preferred embodiment of the present invention disclosed that the spinning speed of the workpiece ranges from 400 rpm to 600 rpm.
  • the required maximum temperature ranges from 750 °C to 850 °C.
  • the predetermined lower temperature ranges from 250 °C to 350 °C.
  • Further embodiment of the present invention discloses a unitary pipe having a combination of square and circular cross sections produced according to the method in claim 1.
  • Figure 1 is a fragmentary perspective view of an assembly consisting of a clamped workpiece (10), for example a square sectioned pipe, a heating torch (12) or heating means and a pressure roller having a flat rim (13) in accordance to a preferred embodiment of the present invention
  • Figure 2 is a fragmentary perspective view of a similar assembly in Figure 1, where the workpiece (10) is transformed into a cylindrical shape.
  • Figure 3 is a fragmentary perspective view of the assembly having a pressure roller with a rounded rim (14) in accordance to another embodiment of the present invention.
  • Figure 4 is another fragmentary perspective view of the similar assembly in Figure 3, where sharp edges of the workpiece (10) is smoothen out.
  • Figure 5 is a side view of the workpiece (10) and roller with a flat rim (13) in accordance to a preferred embodiment of the present invention.
  • Figure 6 is a front view of the workpiece (10) with dotted lines showing shapes of workpiece (10) after each pass of the roller with the flat rim (13).
  • Figure 7 is a side view of the workpiece (10) and the roller with a rounded rim (14) in accordance to another preferred embodiment of the present invention.
  • Figure 8 is a front view of the workpiece (10) with dotted lines showing shapes of inner surface of the workpiece (10) after each pass of the roller with the rounded rim (14).
  • the present invention generally relates to pipes but more particularly to a method of producing a unitary pipe having a combination of square and circular cross sections, hereinafter referred to as combination pipe, for brevity.
  • the heating torch (12) can be an oxy-acetylene torch.
  • a mandrel is preferred to be inserted into hollow of the workpiece (10) to constrain the workpiece (10) so that its axis does not move during the compression process.
  • the mandrel can be removed from the workpiece (10) after the compression process.
  • the heating torch (12) is withdrawn or extinguished.
  • a roller having a flat rim (13) is pressed against the predetermined portion of the spinning workpiece (10) to gradually transform the heat- softened square-sectioned pipe into a cylindrical or circular-sectioned form.
  • a roller having a round rim (14) is pressed against the transformed portion of the spinning workpiece (10) when it is still pliable and hot at a predetermined lower temperature ranging from 250 °C to 350 °C.
  • the force acting on the workpiece (10) is intermittent.
  • the workpiece (10) axis would change due to the intermittent force.
  • the roller having a flat-surfaced rim (13) may leave circular grooves around the transformed portion of the workpiece (10)
  • the roller having a round rim (14) will polish out the grooves to define a plain surface thereat.
  • the roller with round rim (14) will cause the formation of a beveled or rounded common spot for the workpiece (10) and the transformed portion, thereby eliminating undesirable sharp edges or corners.
  • the circular sectioned portion may have a reduced diameter but thicker material thickness, thereby providing a stronger coupling function.

Abstract

L'invention concerne un procédé de production d'un tuyau monobloc possédant une combinaison de coupes transversales carrée et circulaire, comprenant les étapes consistant à serrer solidement une pièce à travailler (10) ou un tuyau possédant une coupe transversale carrée à une prise de pièce à travailler d'un tour ; faire tourner la pièce à travailler solidement serrée (10) selon une vitesse de rotation prédéterminée en commandant le tour ; chauffer une partie prédéterminée de la pièce à travailler (10) avec un chalumeau (12) ; éteindre le chalumeau (12) une fois que la température maximale requise est atteinte ; presser un rouleau possédant un rebord plat (13) contre la partie chauffée de la pièce à travailler (10) pour transformer progressivement sa coupe transversale carrée en une coupe transversale circulaire ; et presser la partie transformée avec un rouleau possédant un rebord rond (14) lorsque la pièce à travailler (10) est à une température prédéterminée plus basse pour produire un point commun arrondi de la coupe transversale carrée et de la coupe transversale circulaire transformée.
PCT/MY2014/000008 2013-01-17 2014-01-16 Procédé de production d'un tuyau monobloc possédant une combinaison de coupes transversales carrée et circulaire WO2014112865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2013700110 2013-01-17
MYPI2013700110A MY175943A (en) 2013-01-17 2013-01-17 A method of producing a unitary pipe having a combination of square and circular cross sections

Publications (1)

Publication Number Publication Date
WO2014112865A1 true WO2014112865A1 (fr) 2014-07-24

Family

ID=51209876

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2014/000008 WO2014112865A1 (fr) 2013-01-17 2014-01-16 Procédé de production d'un tuyau monobloc possédant une combinaison de coupes transversales carrée et circulaire

Country Status (2)

Country Link
MY (1) MY175943A (fr)
WO (1) WO2014112865A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016069273A1 (fr) * 2014-10-30 2016-05-06 United States Gypsum Company Adaptateur de grille d'évacuation pour mélangeur de suspension de géométrie de section transversale transitoire
WO2016077119A1 (fr) * 2014-11-13 2016-05-19 Lockheed Martin Corporation Fabrication additive de tuyaux
CN108127024A (zh) * 2017-12-22 2018-06-08 温州泳恒科技有限公司 一种小导管尖头机
US10011045B2 (en) 2014-05-19 2018-07-03 United States Gypsum Company Slurry mixer gate with enhanced flow and foaming geometry
WO2018217149A1 (fr) * 2017-05-24 2018-11-29 Valmet Ab Système et goulotte à copeaux pour la distribution de matière cellulosique broyée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050257588A1 (en) * 2004-05-21 2005-11-24 Lancaster Paul B Metal spin forming head
WO2012000490A2 (fr) * 2010-06-27 2012-01-05 Technische Universität Dortmund Procédé et dispositif de formage incrémentiel de tubes profilés, notamment de tubes profilés présentant des variations de section transversale sur leur axe longitudinal
US20120139236A1 (en) * 2010-12-02 2012-06-07 Victaulic Company Pipe Element Having Shoulder, Groove and Bead and Methods and Apparatus for Manufacture Thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050257588A1 (en) * 2004-05-21 2005-11-24 Lancaster Paul B Metal spin forming head
WO2012000490A2 (fr) * 2010-06-27 2012-01-05 Technische Universität Dortmund Procédé et dispositif de formage incrémentiel de tubes profilés, notamment de tubes profilés présentant des variations de section transversale sur leur axe longitudinal
US20120139236A1 (en) * 2010-12-02 2012-06-07 Victaulic Company Pipe Element Having Shoulder, Groove and Bead and Methods and Apparatus for Manufacture Thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10011045B2 (en) 2014-05-19 2018-07-03 United States Gypsum Company Slurry mixer gate with enhanced flow and foaming geometry
WO2016069273A1 (fr) * 2014-10-30 2016-05-06 United States Gypsum Company Adaptateur de grille d'évacuation pour mélangeur de suspension de géométrie de section transversale transitoire
US9694332B2 (en) 2014-10-30 2017-07-04 United States Gypsum Company Slurry mixer discharge gate adapter with transitioning cross-sectional geometry
WO2016077119A1 (fr) * 2014-11-13 2016-05-19 Lockheed Martin Corporation Fabrication additive de tuyaux
US10197196B2 (en) 2014-11-13 2019-02-05 Lockheed Martin Corporation Additive manufacturing of pipes
US10690270B2 (en) 2014-11-13 2020-06-23 Lockheed Martin Corporation Additive manufacturing of pipes
WO2018217149A1 (fr) * 2017-05-24 2018-11-29 Valmet Ab Système et goulotte à copeaux pour la distribution de matière cellulosique broyée
US11655588B2 (en) 2017-05-24 2023-05-23 Valmet Ab System and chip chute for feeding comminuted cellulosic material
CN108127024A (zh) * 2017-12-22 2018-06-08 温州泳恒科技有限公司 一种小导管尖头机
CN108127024B (zh) * 2017-12-22 2019-11-01 温州泳恒科技有限公司 一种小导管尖头机

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Publication number Publication date
MY175943A (en) 2020-07-16

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