EP3487643B1 - Dispositif de préparation d'une extrémité de tube pour l'étirage - Google Patents

Dispositif de préparation d'une extrémité de tube pour l'étirage Download PDF

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Publication number
EP3487643B1
EP3487643B1 EP17751274.6A EP17751274A EP3487643B1 EP 3487643 B1 EP3487643 B1 EP 3487643B1 EP 17751274 A EP17751274 A EP 17751274A EP 3487643 B1 EP3487643 B1 EP 3487643B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
indentation
tube
tube end
pipe
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.)
Active
Application number
EP17751274.6A
Other languages
German (de)
English (en)
Other versions
EP3487643A1 (fr
Inventor
Hardy HARDY JUNGEN
Thomas Winterfeldt
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3487643A1 publication Critical patent/EP3487643A1/fr
Application granted granted Critical
Publication of EP3487643B1 publication Critical patent/EP3487643B1/fr
Active legal-status Critical Current
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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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal 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
    • B21C1/22—Metal 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 specially adapted for making tubular articles
    • B21C1/24—Metal 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 specially adapted for making tubular articles by means of mandrels
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal 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
    • B21C1/32—Feeding or discharging the material or mandrels
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same
    • 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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube

Definitions

  • the invention relates to a device for preparing a pipe end for slide drawing according to the preamble of claim 1 and a method for preparing a pipe end for slide drawing.
  • one end of the tube must be prepared appropriately for connection with drawing pliers.
  • this mandrel In the case of slide drawing with a sliding mandrel, this mandrel must also be introduced in a localized manner in the starting area of the pipe. As a rule, such preparatory measures are largely carried out manually and with little or no degree of automation.
  • US 1,982,544A describes a device for expanding a pipe by means of a drawn mandrel, which is designed as a head on a rod or as a mandrel rod. A floating mandrel is not described.
  • AT 291 161 B which forms the basis for the preamble of claim 1, describes a device for the automated preparation of a tube end for drawing with a flying mandrel in the shape of an olive. The mandrel is inserted directly into the previously unexpanded pipe end.
  • EP 0 189 293 A2 describes certain further developments of mandrels for drawing tubes in connection with a lubricant supply.
  • the use of a device according to the invention relates preferably, but not necessarily, to pipes made of a relatively soft metal such as copper. Similar to the use of a sliding mandrel in the tube, the slide drawing subsequent to the preparation forms the tube while reducing the wall thickness but maintaining or forming a defined inner diameter.
  • the object of the invention is to provide a device for preparing a pipe end for sliding drawing, which allows easy and reliable positioning of the sliding mandrel in the pipe end.
  • the floating mandrel Due to the automated expansion using the expanding mandrel, the floating mandrel can then be easily and safely inserted into the pipe end.
  • the device comprises a feed member for inserting the floating mandrel into the pipe end and a pressing member for applying at least one indentation to hold the floating mandrel.
  • the pipe end is first automatically widened by means of the conical expanding mandrel before the feed member presses the floating mandrel into the inserts the end of the pipe.
  • An expanding mandrel can easily be a mandrel tapering at a suitable angle.
  • An automated process within the meaning of the invention is preferably understood to mean that no manual interventions are made at the pipe end between the steps of the automated process.
  • a pressing member is preferably understood to mean a pair of tongs or a plurality of tongs, by means of which a local forming force is exerted to form radially directed indentations.
  • the indentations narrow the tube cross section locally, so that they limit a free movement of the sliding mandrel, in particular until the start of a drawing process.
  • the forces occurring by means of drawing tongs and a drawing die are then so great that the floating mandrel is pressed over a respective indentation.
  • the detachable holder for holding the tube end in a centered manner can be designed in different ways within the meaning of the invention.
  • a first possibility can be a device that is separate from the pressing member.
  • Such a holder can in particular be arranged at a distance from the pressing member.
  • the bracket and the pressing member can preferably be movable relative to each other. Particularly preferably, the pressing member can be moved towards the held pipe end, or the pipe end received in the holder can be fed to the pressing member.
  • the holder can be designed as an integral unit with the pressing member.
  • at least one pressing pin of the pressing member can be designed as one of several supports for holding the pipe end.
  • the pressing pin can be present as an element that can be moved separately relative to the rest of the holder. This makes it possible to initially obtain a deformation-free mounting of the pipe end, in order to then introduce one (or more) indentations by actuating the at least one press pin.
  • the pressing pin can also be provided as a fixed projection in the area of a correspondingly strong holder, which can be closed, for example, in the manner of pliers. In such a solution, the steps of holding and indenting are performed simultaneously.
  • the expanding mandrel has an injector for introducing drawing oil into the tube. This combines the flaring and lubricating required prior to insertion of the sliding mandrel.
  • the injector can in particular be designed as a separately movable line in a central bore of the expanding mandrel.
  • the pressing member can separately indent a first indentation positioned in front of the mandrel and a second indentation positioned behind the mandrel.
  • the tube can be held in a form-fitting manner in a longitudinal direction of the tube by means of the first indentation when the expanding mandrel expands the tube end. This effectively absorbs the high axial forces during expansion. The sliding mandrel can then be inserted without any problems, since the second indentation has not yet existed.
  • the pressing member has at least two pressing pins spaced apart from one another in the longitudinal direction of the pipe, which can be pressed against the end of the pipe independently of one another.
  • a pressing member that can be moved relative to the pipe can also be provided, so that the first and the second indentation can be introduced by means of the same pressing pin.
  • the device comprises a pointing press, by means of which the pipe end is pointed after the floating mandrel has been introduced for drawing tongs.
  • a pointing press by means of which the pipe end is pointed after the floating mandrel has been introduced for drawing tongs.
  • the sharpening is also automated, so that no manual manipulations have to be carried out on the pipe, from the centered holding of the pipe to the expansion and introduction of the floating mandrel to the pointing of the pipe end.
  • the device according to the invention also advantageously allows the pipe end to have a non-rectangular, in particular undefined, cut edge, with the expanding mandrel engaging in the pipe end without correcting the cut edge.
  • Pipes can, for example, have angles of cutting edges of more than 30° with respect to a longitudinal pipe axis and can nevertheless be prepared reliably and automatically with the device according to the invention.
  • the object of the invention is also achieved by a method for preparing a pipe end for slide drawing, according to claim 5.
  • all steps of a method according to the invention are automated and carried out together without manual interaction. At most, provision can be made for the pipe end to be fed manually to the holder for the first time. Depending on the degree of automation of the overall system for tube drawing, this transfer can also be automated.
  • the method also includes the step: e. Making a second indentation by means of the pressing member with the floating mandrel trapped between the two indentations.
  • the mandrel is positively and particularly securely fixed in both directions in the pipe end.
  • the method is particularly preferably carried out using a device according to the invention.
  • the device shown comprises a frame 1 on which a plurality of movably movable elements are accommodated.
  • a detachable holder 2 for receiving a pipe 3 is arranged on the frame 1 .
  • a clamp 2a acts on the circumference of the pipe 3 with little damage.
  • the tube 3 is preferably made of a soft metal, for example copper. It has one end with a cutting edge that is largely undefined in terms of angle and orientation.
  • the major part of the tube 3 is received in a drum (not shown), by means of which it is brought to a drawing station after the preparation of a tube end 4 .
  • the device according to the invention can also be designed to be movable overall and be moved to a respective pipe for preparation.
  • the pressing member 5 After receiving the tube end 4 in the holder 2, a pressing member 5 runs over the tube end 4.
  • the pressing member 5 comprises two spaced apart arranged pressing pin 6, 7, each of which can be controlled by means of a separate hydraulic cylinder 6a, 7a.
  • the pressing pins 6, 7 are each arranged as opposing or counteracting pairs of pins.
  • Alternative arrangements, each with only a single pressing pin 6, 7 and a corresponding abutment, are also possible.
  • the pressing member 5 is arranged on a pivot arm 8 which is held on the frame 1 and can be pivoted about an axis 8b towards or away from the pipe end 4 by means of an actuator 8a.
  • a holding member 9 with a clamping holder 9a for the pipe end 4 is also arranged on the swivel arm 8.
  • An expanding mandrel 10 is accommodated in a mandrel holder 11 that can be moved on the frame.
  • the mandrel holder 11 can be automatically moved along the frame 1 in order to bring the expanding mandrel 10 to the level of the pipe end 4 (see Fig 2 ).
  • the expanding mandrel 10 can then be advanced automatically in the longitudinal direction of the pipe, in the present case horizontally.
  • the expanding mandrel enters the pipe end 4 and expands it (see 3 ).
  • the pipe end 4 can, as in 3 and 4 indicated, have a sloping cutting edge 4a with an undefined angle, with the flat taper of the expanding mandrel 10 nevertheless ensuring adequate guidance and expansion.
  • a first indentation 4b is made in the pipe 3 by means of the first press pin 6 before the expanding mandrel is advanced.
  • the pressing pin 6 initially remains in the sunken position in the indentation 4b, so that a positive fit is achieved in the longitudinal direction of the pipe (see position of the pressing pins 6, 7 in Fig 2 ).
  • the forces of the expanding mandrel 10 acting in the longitudinal direction of the pipe are thus predominantly introduced into the frame 1 by the first pressing pin 6 or the pressing member 5 via the swivel arm 8 .
  • a Slipping or wandering of the pipe 3 during the expansion is effectively prevented.
  • a denting of the pipe end 4 by the second press pin 7 does not take place at this time.
  • the expanding mandrel also has a central channel 11, which serves as an injector for feeding drawing oil into the interior of the tube 3 in its end region.
  • the drawing oil is expediently injected during the expansion so that the friction of the expansion mandrel can also be reduced.
  • drawing oil is used to slide a floating mandrel 12, which is introduced into the pipe end 4 after the expansion.
  • the floating mandrel 12 is detachably mounted on a lance-shaped feeding member 13 .
  • the feed member 13 is accommodated parallel to the expanding mandrel on a carrier 14 which can be moved relative to the frame 1 .
  • the carrier 14 accommodates both the mandrel holder 11 of the expanding mandrel 10 and the feed member 13 of the floating mandrel 12 .
  • the expanding mandrel 10 is withdrawn again and the carrier 14 moves into a position in which the floating mandrel 12 is level with the now expanded pipe end 4 .
  • the mandrel 12 is now inserted into the tube end 4 with the feed member 13 (see FIG figure 5 ).
  • the mandrel 12 ultimately comes to rest in front of the first indentation 4b.
  • a second indentation 4c is introduced into the tube 3 by means of the second pressing pins 7, so that the floating mandrel 12 is trapped between the first indentation 4a positioned in front of the mandrel 12 and the second indentation 4b positioned behind the mandrel (see Fig 6 ).
  • the feed member 13 is now disengaged from the mandrel 12 and withdrawn.
  • a pointing press 15 which is also movably held on the frame 1, then moves into position and presses the end of the tube 3 into a reduced diameter. This process is also referred to as sharpening the pipe end 4 .
  • the pipe end 4 prepared in this way can be gripped in the pointed area with drawing tongs (not shown) and pulled through a drawing die.
  • the floating mandrel is carried along in a known manner.
  • the holder 2 and the pressing member 5 are formed as separate and spaced apart units.
  • the holder and the pressing member can also be formed as an integral unit. je
  • the pressing member can have one or more separately actuatable pressing pins, similar to the example described.
  • at least one of the pressing pins can be designed as a fixed projection in the holder, so that closing the holder also causes the pipe end to dent. To this extent, the steps of holding the pipe end and making an indentation are not carried out automatically one after the other, but automatically and simultaneously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (6)

  1. Dispositif destiné à la préparation d'une extrémité de tube (4) à des fins d'étirage avec un mandrin flottant (12), qui comprend :
    un support amovible (2) destiné au maintien centré de l'extrémité de tube (4) ;
    un organe de presse (5) destiné à l'application d'au moins une dépression (4b, 4c) pour le maintien du mandrin flottant (12) ;
    le mandrin flottant (12) de même qu'un organe d'acheminement (13) destiné à l'introduction du mandrin flottant (12) dans l'extrémité de tube (4) ;
    caractérisé
    en ce que le dispositif présente un mandrin conique d'expansion (10) au moyen duquel l'extrémité de tube (4) est élargie d'une manière automatisée et le mandrin d'expansion (10) présente un dispositif d'injection (10a) destiné à introduire un lubrifiant d'étirage dans le tube (3).
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif est réalisé dans le but de maintenir le tube (3) au moyen de la première dépression (4b) par complémentarité de forme dans une direction longitudinale du tube, au cours de l'élargissement de l'extrémité de tube (4) au moyen du mandrin d'expansion (10).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'organe de presse (5) présente au moins deux tourillons de presse (6, 7) qui sont espacés l'un de l'autre dans la direction longitudinale du tube, qui peuvent être comprimés contre l'extrémité de tube (4) d'une manière respectivement indépendante, afin d'introduire une première dépression (4b) disposée avant le mandrin (12) et une deuxième dépression (4c) derrière le mandrin (12) d'une manière respectivement indépendante.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif comprend une presse d'appointage (15) au moyen de laquelle l'extrémité de tube (4) est soumise à un appointage après l'introduction du mandrin flottant (12), pour une pince à étirer.
  5. Procédé destiné à la préparation d'une extrémité de tube (4) à des fins d'étirage au moyen d'un dispositif en conformité avec l'une quelconque des revendications précédentes ; dans lequel la totalité des étapes du procédé sont mises en oeuvre de manière automatisée et de manière conjointe en l'absence d'une interaction manuelle, qui comprend les étapes :
    a. le maintien centré de l'extrémité de tube (4) dans un support (2) ;
    b. l'introduction d'au moins une première dépression (4b) au moyen d'un organe de presse (5, 6) ;
    c. l'élargissement de l'extrémité de tube (4) au moyen d'un mandrin conique d'expansion (10) ; dans lequel l'extrémité de tube (4) est maintenue dans une direction longitudinale du tube par l'intermédiaire de l'organe de presse (5, 6) et de la première dépression (4b) ;
    d. l'introduction d'un lubrifiant d'étirage dans le tube (3) par l'intermédiaire d'un dispositif d'injection (10a) du mandrin d'expansion (10) ; et
    e. l'incorporation d'un mandrin flottant (12) dans l'extrémité de tube (4) jusque devant la première dépression (4b).
  6. Procédé selon la revendication 5, caractérisé par l'étape dans laquelle :
    on introduit une deuxième dépression (4c) au moyen de l'organe de presse (5, 7) ; dans lequel le mandrin flottant (12) est saisi entre les deux dépressions (4b, 4c).
EP17751274.6A 2016-07-22 2017-07-21 Dispositif de préparation d'une extrémité de tube pour l'étirage Active EP3487643B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102016213480 2016-07-22
DE102017202723.1A DE102017202723B4 (de) 2016-07-22 2017-02-21 Vorrichtung zur Vorbereitung eines Rohrendes zum Gleitziehen
US15/437,495 US10639690B2 (en) 2016-07-22 2017-02-21 Preparing a tube end for rod drawing
PCT/EP2017/068471 WO2018015533A1 (fr) 2016-07-22 2017-07-21 Dispositif pour préparer à l'étirage une extrémité de tube

Publications (2)

Publication Number Publication Date
EP3487643A1 EP3487643A1 (fr) 2019-05-29
EP3487643B1 true EP3487643B1 (fr) 2023-02-22

Family

ID=60889953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17751274.6A Active EP3487643B1 (fr) 2016-07-22 2017-07-21 Dispositif de préparation d'une extrémité de tube pour l'étirage

Country Status (5)

Country Link
US (1) US10639690B2 (fr)
EP (1) EP3487643B1 (fr)
JP (1) JP6726353B2 (fr)
DE (1) DE102017202723B4 (fr)
WO (1) WO2018015533A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10423638B2 (en) * 2017-04-27 2019-09-24 Google Llc Cloud inference system
CN116532495B (zh) * 2023-05-25 2023-11-07 松阳县永欣机械制造有限公司 一种管胚防顶撞控制装置及冷轧管机

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Publication number Priority date Publication date Assignee Title
US198254A (en) 1877-12-18 Improvement in combined cotton cultivator and planter
US114116A (en) * 1871-04-25 Improvement in double-trees
US1791887A (en) * 1929-06-01 1931-02-10 Nat Tube Co Apparatus for expanding pipe ends
US1982544A (en) * 1931-08-22 1934-11-27 Tubus A G Method and apparatus for elongating metal articles
US2016795A (en) * 1935-05-17 1935-10-08 William L Belknap Device for flaring pipe
US2728373A (en) * 1951-08-04 1955-12-27 Reisholz Stahl & Roehrenwerk Process for expanding preheated tubular bodies
LU57123A1 (fr) 1967-11-09 1969-01-27
US3572080A (en) * 1968-10-03 1971-03-23 George A Mitchell Co Production of pointed workpieces
DE2758137C2 (de) 1977-12-27 1983-12-08 Hunger, Walter, 8700 Würzburg Einziehmaschine zur Ausformung von Rohrangeln
US4779441A (en) * 1983-04-15 1988-10-25 Pringle William L Tube having a flared end
GB8501572D0 (en) * 1985-01-22 1985-02-20 Sansome D H Plug drawing of tubes
DE3805838C2 (de) * 1987-11-24 1997-03-13 Km Europa Metal Ag Verfahren und Vorrichtung zum Ziehen von nahtlosen Metallrohren
US4843860A (en) * 1988-06-06 1989-07-04 Carrier Corporation Two stage impact beller
DE19756293A1 (de) 1997-12-10 1999-06-17 Mannesmann Ag Vorrichtung zum Kalibrieren von Rohrenden
JP5280971B2 (ja) * 2009-08-18 2013-09-04 昭和電工株式会社 金属管の引抜装置および引抜方法
JP6124044B2 (ja) * 2011-07-20 2017-05-10 京進工業株式会社 熱交換器挿通管の掴持体の製造方法
US9555464B2 (en) * 2012-06-21 2017-01-31 Carrier Corporation Tension expansion clamping tool block

Also Published As

Publication number Publication date
WO2018015533A1 (fr) 2018-01-25
JP6726353B2 (ja) 2020-07-22
JP2019523138A (ja) 2019-08-22
DE102017202723B4 (de) 2024-05-08
DE102017202723A1 (de) 2018-01-25
US10639690B2 (en) 2020-05-05
EP3487643A1 (fr) 2019-05-29
US20180021826A1 (en) 2018-01-25

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