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1. WO1982003191 - METHOD AND APPARATUS FOR PRODUCTION OF TUBES, AND RESULTING PRODUCT

Publication Number WO/1982/003191
Publication Date 30.09.1982
International Application No. PCT/SE1982/000064
International Filing Date 12.03.1982
IPC
B21C 1/24 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
1Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
16Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
22specially adapted for making tubular articles
24by means of mandrels
B21C 37/28 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
15Making tubes of special shape; Making the fittings
28Making tube fittings for connecting pipes, e.g. U-pieces
B21D 7/022 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
7Bending rods, profiles, or tubes
02over a stationary forming member; by use of a swinging forming member or abutment
022over a stationary forming member only
CPC
B21C 1/24
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
1Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
22specially adapted for making tubular articles
24by means of mandrels
B21C 37/28
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
37Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
06of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
15Making tubes of special shape; Making tube fittings
28Making tube fittings for connecting pipes, e.g. U-pieces
B21D 7/022
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
7Bending rods, profiles, or tubes
02over a stationary forming member; by use of a swinging forming member or abutment
022over a stationary forming member only
Applicants
  • SANTRADE LIMITED [CH]/[CH] (AllExceptUS)
  • ENKVIST, Göthe [SE]/[SE] (UsOnly)
Inventors
  • ENKVIST, Göthe
Agents
  • ÖSTLUND, Alf
Priority Data
8101609-913.03.1981SE
8105474-415.09.1981SE
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR PRODUCTION OF TUBES, AND RESULTING PRODUCT
(FR) PROCEDE ET APPAREIL DE PRODUCTION DE TUBES, ET PRODUIT OBTENU
Abstract
(EN) The invention makes the production of bent tubes possible by cold drawing of a hollow tube blank (10) in one operation for reduction of the outer diameter and the wall thickness. It is characterized in that a straight tube blank is drawn through a drawing tool comprising a drawing die (13) and a straight mandrel (12) which is short relative to the tube blank and applied centrally in the tube blank. Drawing means (15, 16) attached to the tube end draw the tube along a pre-determined curved path, suitably in surface contact with a guiding device (17) with a pre-determined curved surface. The drawing die is turned along a predetermined curved path simultaneously as the tube drawn is through the drawing die. Hereby production of tubes with a curvature adjusted to each purpose becomes possible.
(FR) L'invention permet la production de tubes courbés par étirage à froid d'une ébauche tubulaire creuse (10) en une opération pour réduire le diamètre extérieur et l'épaisseur de la paroi. Elle se caractérise en ce qu'une ébauche de tube droite est retirée à l'aide d'un outil d'étirage comprenant une matrice d'étirage (13) et un mandrin droit (12) qui est court par rapport à l'ébauche du tube et est appliqué centralement dans l'ébauche tubulaire. Des moyens d'étirage (15, 16) fixés à l'extrémité du tube étirent le tube le long d'un chemin incurvé prédéterminé, d'une manière appropriée en contact superficiel avec un dispositif de guidage (17) ayant une surface courbe prédéterminée. La matrice d'étirage est tournée le long d'un chemin incurvé prédéterminé simultanément à l'étirage du tube au travers de la matrice d'étirage. Ainsi, la production de tubes avec une courbure adaptée à chaque besoin devient possible.
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