WO1980000667A1 - Procede de fabrication par repoussage d'un tuyau coude en tole, a paroi mince et sans cordon de raccord, a rayon de courbure, angle d'ouverture et diametre du tuyau determines, avec ou sans embouts cylindriques terminaux, a partir d'une ebauche tubulaire a paroi epaisse, et machine pour la mise en oeuvre du procede - Google Patents

Procede de fabrication par repoussage d'un tuyau coude en tole, a paroi mince et sans cordon de raccord, a rayon de courbure, angle d'ouverture et diametre du tuyau determines, avec ou sans embouts cylindriques terminaux, a partir d'une ebauche tubulaire a paroi epaisse, et machine pour la mise en oeuvre du procede Download PDF

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Publication number
WO1980000667A1
WO1980000667A1 PCT/CH1979/000116 CH7900116W WO8000667A1 WO 1980000667 A1 WO1980000667 A1 WO 1980000667A1 CH 7900116 W CH7900116 W CH 7900116W WO 8000667 A1 WO8000667 A1 WO 8000667A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
bend
core
sheet metal
tube
Prior art date
Application number
PCT/CH1979/000116
Other languages
German (de)
English (en)
Inventor
H Blaser
Original Assignee
H Blaser
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
Priority claimed from CH1054378A external-priority patent/CH633928A5/de
Application filed by H Blaser filed Critical H Blaser
Publication of WO1980000667A1 publication Critical patent/WO1980000667A1/fr

Links

Classifications

    • 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
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • 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
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the present invention seeks to remedy the above disadvantages by means of a method which relates to the outward pressing of thin-walled seamless and rebate-free sheet metal pipe bends of any bend radius, bend angle, pipe diameter from a short and thick-walled pipe blank, provided that the caliber and exact shape are used, with absolutely smoothness Surface of the elbow.
  • the thin-walled pipe bend can be made with or without cylindrical pipe extensions, made of iron, copper, brass, aluminum, zinc, etc.
  • the sheet metal pipe bends made from a thick-walled and short pipe blank can have a wall thickness of 0.2 - 1.5: mm and more ,
  • a short and thick-walled tube blank is placed on a tube bend core giving the desired tube bend shape and is pivoted with this in accordance with the given tube bend radius between pressure rollers of a rotating pressure roller head, which rotate around the tube blank and act on them, which rotating pressure rollers pivot the outflow pressure onto the pivoting one Effect pipe blank and roll it into a thin-walled sheet metal pipe bend with a smooth pipe surface.
  • the pressure rollers are adjusted radially towards one another in order to exert the flow pressure on the sheet metal tube bend to be formed.
  • the pipe blank can be converted into a sheet metal pipe bend with a wall thickness of approx. 0.2 to 1.5 mm and more, and of any bend radius, bend angle and pipe diameter, with an absolutely smooth pipe bend surface and precise caliber maintenance and exact shaping from a single piece any seam or fold.
  • a cylindrical pipe core is attached to the front of the bend core supporting the pipe bend as a core extension, whereupon the cylindrical outflow pressing is carried out by moving a support parallel to the axis of the pressure roller head.
  • the blanks to be machined do not rotate, but are machined with flow pressure by the radially adjustable pressure rollers of the driven pressure roller head.
  • a machine is used to carry out the process, which rotatably supports a motor-driven pressure roller head with pressure rollers that can be moved or controlled radially from and against one another in a machine frame, under which a cross slide that can be moved and displaced is located on a base plate. The latter rests on a support which can be pivoted about a vertical pivot axis as the carrier of an exchangeable tube bend core which accommodates the tube bend blank and which, while maintaining the tube bend radius, can be pivoted in an arc shape into the pressure roller head between the rotating pressure rollers.
  • FIG. 1 shows the machine in a longitudinal view
  • FIG. 2 shows a plan view
  • FIG. 3 shows a top view without the pressure roller head
  • FIG. 4 shows a pressure roller head in longitudinal section with support
  • FIG. 5 shows the pressure roller head in front view
  • FIGS. 6 and 7 show a tube blank in a view and top view
  • FIG. 8 shows the seam produced according to the present flow printing method and fold-free, smooth, one-piece thin-walled sheet metal pipe bend in view.
  • An electric motor 3 for driving a pressure groove head 4 rests on a base plate 1 of a machine frame 2.
  • the latter is rotatably mounted with a hollow shaft 5 by means of bearings 6, 7 in the machine frame 2.
  • a hollow shaft 5 In the hollow shaft 5 there is an axially displaceable but not rotatable push rod 8 which is actuated hydraulically, pneumatically etc. at 9 (cylinder with piston).
  • actuated hydraulically, pneumatically etc. at 9 cylinder with piston
  • Push rod end sits an interchangeable cylindrical
  • Tube core 10 which can be replaced by a tube core with a different dimension in diameter.
  • the push rod 8 is guided by guide bearings 11.
  • a cylinder 12 which can be pushed back and forth is pushed on, mechanically controllable at 13 or in another way.
  • This has a conical inner jacket 14 for controlling three pressure rollers 15 in a star shape that are radially adjustable in relation to one another in the pressure roller head 4.
  • the latter are guided, for example, in a spring-loaded manner in the pressure roller head 4 with a guide axis 16, so that the free ends of the axes 16 abut the inner casing 14.
  • rollers 17 can act on a flange 18 of the cylinder 12 by its displacement.
  • a cross chute 19 is guided back and forth on rods 20 of the machine frame 2 on the base plate 1, while the upper cross slide part 21 is transversely adjustable.
  • a support 23 is seated on a vertical axis 22 for receiving an exchangeable tube bend core 24.
  • the tubular and thick tube blank 25 to be machined is pushed onto it.
  • the desired radius of the pipe bend and the diameter of the pipe the
  • the pivot axis R of the support 23 can be shortened or lengthened by exchanging the corresponding support 23 and simultaneously adjusting the cross slide upper part 21, which is made possible by transverse slots 26 therein.
  • the support 23 is driven by an electric motor 27 via a gear 28 for exercising a pivoting movement in the radius R.desi tube bend core 24 with the tube blank in the direction of the pressure roller head 4 and its rotating pressure rollers 15.
  • the cross pour communicates with a controllable by a cylinder 29 of driven shaft 30 in motion connection, in turn, hydraulically or pneumatically, electrically or by H and.
  • an ejection lever 31 which can be pivoted on all sides on the cross slide 19 on its upper part, serves the end of the bend core 24 with a fork piece 32 or the like located at the free end comprises a pipe bend end of the rolled sheet metal pipe bend 33 at 36.
  • the cylindrical core extension 10 is required on the end of the pipe bend core 24, which sits on the push rod 8, which is pushed forward as an extension to the pipe bend core 24 with the push rod 8.
  • the cylindrical pipe bend extension 34 to be achieved can be the same, larger or smaller than the pipe bend diameter, as desired. It can thus also be shaped widely or narrowly into the cylindrical tube arch extensions 34.
  • the cylinder 9 with the piston comes into action in order to bring about the longitudinal displacement of the cross slide 19, the cylinder 29 being able to cooperate with the piston, or merely being displaced.
  • the sheet metal pipe bend 33 (FIG. 8) which is produced seamlessly and without seams by the machine using the machine has an absolutely smooth surface. It contains caliber and conforms to shape. As an extension of the pipe bend, it can have cylindrical pipe bend extensions 34, which can be the same as the pipe bend diameter or can be narrowed or expanded. The wall thickness measures approx. 0.2 to 1.5 mm or more depending on the purpose of the sheet metal pipe bend.

Abstract

Procede et machine pour la mise en oeuvre du procede pour la fabrication par repoussage d'un tuyau coude en tole, a paroi mince, sans cordon de soudure ni ligne de pliage, a rayon de courbure, angle d'ouverture et diametre du tuyau determines, a partir d'une ebauche tubulaire courte et a paroi epaisse. L'ebauche (25) est placee sur un noyau arque (24) correspondant au rayon de courbure voulu, entre des rouleaux presseurs (15) reciproquement reglables et disposes radialement sur une tete (4). Le noyau (24) pivote selon le rayon de l'arc voulu sans tourner sur lui-meme, pour permettre le laminage de l'ebauche (25) par rotation des rouleaux (15) autour de la piece a usiner pour former le tuyau coude (33) a la longueur voulue, avec une epaisseur de paroi comprise entre environ 0,2 et 1,5 mm.
PCT/CH1979/000116 1978-10-11 1979-09-03 Procede de fabrication par repoussage d'un tuyau coude en tole, a paroi mince et sans cordon de raccord, a rayon de courbure, angle d'ouverture et diametre du tuyau determines, avec ou sans embouts cylindriques terminaux, a partir d'une ebauche tubulaire a paroi epaisse, et machine pour la mise en oeuvre du procede WO1980000667A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1054378A CH633928A5 (de) 1977-11-03 1978-10-11 Regelbare heizvorrichtung fuer das ausdehnungsmedium in waermesteuervorrichtungen.
CH10543/78 1978-10-11

Publications (1)

Publication Number Publication Date
WO1980000667A1 true WO1980000667A1 (fr) 1980-04-17

Family

ID=4364323

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1979/000116 WO1980000667A1 (fr) 1978-10-11 1979-09-03 Procede de fabrication par repoussage d'un tuyau coude en tole, a paroi mince et sans cordon de raccord, a rayon de courbure, angle d'ouverture et diametre du tuyau determines, avec ou sans embouts cylindriques terminaux, a partir d'une ebauche tubulaire a paroi epaisse, et machine pour la mise en oeuvre du procede

Country Status (1)

Country Link
WO (1) WO1980000667A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104028607A (zh) * 2014-06-06 2014-09-10 中国航天科技集团公司长征机械厂 一种提高旋压减厚管材成品质量的加工方法
CN104607520A (zh) * 2015-01-16 2015-05-13 西北工业大学 一种用于成形波纹管的旋压机构及旋压方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137864A (en) * 1935-09-28 1938-11-22 Taylor James Hall Method of making pipe fittings
US2560822A (en) * 1945-11-08 1951-07-17 Walton S Robinson Means and method for making seamless pipe elbows
US3340713A (en) * 1965-02-11 1967-09-12 James E Webb Spin forming tubular elbows
FR1540166A (fr) * 1967-10-09 1968-09-20 Zentrale Entwicklung Konstrukt Dispositif de pressage de pièces étirées en longueur à symétrie de révolution
DE1289017B (de) * 1963-10-03 1969-02-13 Lodge And Shipley Company Zentrifugalkraftaufnahme eines waehrend des Betriebs radial einstellbaren Traegers fuer ein Drueckwerkzeug
DE2714782A1 (de) * 1977-04-02 1978-10-05 Bertrams Ag Verfahren und vorrichtung zur herstellung von rohrkruemmern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137864A (en) * 1935-09-28 1938-11-22 Taylor James Hall Method of making pipe fittings
US2560822A (en) * 1945-11-08 1951-07-17 Walton S Robinson Means and method for making seamless pipe elbows
DE1289017B (de) * 1963-10-03 1969-02-13 Lodge And Shipley Company Zentrifugalkraftaufnahme eines waehrend des Betriebs radial einstellbaren Traegers fuer ein Drueckwerkzeug
US3340713A (en) * 1965-02-11 1967-09-12 James E Webb Spin forming tubular elbows
FR1540166A (fr) * 1967-10-09 1968-09-20 Zentrale Entwicklung Konstrukt Dispositif de pressage de pièces étirées en longueur à symétrie de révolution
DE2714782A1 (de) * 1977-04-02 1978-10-05 Bertrams Ag Verfahren und vorrichtung zur herstellung von rohrkruemmern

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104028607A (zh) * 2014-06-06 2014-09-10 中国航天科技集团公司长征机械厂 一种提高旋压减厚管材成品质量的加工方法
CN104607520A (zh) * 2015-01-16 2015-05-13 西北工业大学 一种用于成形波纹管的旋压机构及旋压方法

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