EP0083577B1 - Dispositif de serrage d'extrémités de tubes dans une presse hydraulique à refouler les extrémités de tubes - Google Patents

Dispositif de serrage d'extrémités de tubes dans une presse hydraulique à refouler les extrémités de tubes Download PDF

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Publication number
EP0083577B1
EP0083577B1 EP83730001A EP83730001A EP0083577B1 EP 0083577 B1 EP0083577 B1 EP 0083577B1 EP 83730001 A EP83730001 A EP 83730001A EP 83730001 A EP83730001 A EP 83730001A EP 0083577 B1 EP0083577 B1 EP 0083577B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder unit
elbow
pipe end
holding device
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.)
Expired
Application number
EP83730001A
Other languages
German (de)
English (en)
Other versions
EP0083577A1 (fr
Inventor
Herbert Jansen
Richard Gerretz
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT83730001T priority Critical patent/ATE12899T1/de
Publication of EP0083577A1 publication Critical patent/EP0083577A1/fr
Application granted granted Critical
Publication of EP0083577B1 publication Critical patent/EP0083577B1/fr
Expired legal-status Critical Current

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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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/039—Means for controlling the clamping or opening of the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses

Definitions

  • the invention relates to a holding device for the pipe end pieces in a hydraulic pipe end press, which has a C-shaped frame in which the pipe end is held between the upper and lower die half, the lower die half being received in the press table and the upper die half in the crosshead and the crosshead can be moved against the press table with the aid of at least one piston-cylinder unit which applies the holding force (see DE-OS 27 31 055).
  • the upsetting of the tube ends is generally carried out using a tube end upsetting press of the type described above, the upsetting of the tube inserted and held in the die halves being carried out with the aid of an upsetting device provided on the rear side of the C-frame.
  • This consists of a hydraulic cylinder acting in the longitudinal direction of the tube, the force required for the upsetting process is applied via a stepped mandrel to the end face of the tube end piece in its axial direction.
  • the closing of the holding device necessary for holding the pipe end can be divided into two movement processes, one of which serves to move the die halves apart far enough for lateral insertion of the pipe and the other movement serves to actually hold the pipe end in an exciting manner.
  • both movement processes are carried out by a piston-cylinder unit which is large in accordance with the necessary holding force and which must have a stroke which is adapted to the opening travel of the die halves.
  • a device for handling pipes or the like is known from US Pat. No. 2,871,734, in which piston-cylinder units serve to stretch toggle levers which are intended to exert a clamping effect on the pipe in the extended position. Hydraulic bracing of the tube does not take place here, because in the extended position of the toggle lever the tube can only be clamped if the toggle levers are supported against abutments, the latter abutment having to be adjusted if different tube tolerances are to be tensioned.
  • the invention has for its object to provide a holding device of the type mentioned, which allows a reduction in cycle time for loading and unloading the holding device with less construction and cost reduction.
  • a holding device which is characterized by a toggle lever transmitting the holding force in its extended position, one end of which is articulated to the piston of the piston-cylinder unit and the other end of which is articulated to the crosshead and the knee joint is connected to another power drive for kinking and stretching the knee lever.
  • the movement processes described at the outset are divided into two device components, namely a toggle lever for rapid mechanical movement of the crosshead with the upper die half and the exciting holding of the pipe end with the aid of the conventional piston-cylinder unit.
  • This enables the use of short-stroke, high-performance pressure cylinders for the application of the clamping force and weak and therefore less expensive power drives for the tension-free travel of the crosshead with the upper die half.
  • a favorable embodiment of the solution according to the invention is characterized in that for two toggle levers arranged symmetrically next to one another a common power drive is provided for the synchronous bending and stretching of both toggle levers.
  • the power drive for kinking and stretching the knee lever (s) is a piston-cylinder unit.
  • This piston-cylinder unit can be dimensioned weak, since it only has to overcome the displacement force of the crosshead, essentially its own weight.
  • a favorable embodiment of the device according to the invention provides that the piston-cylinder unit is arranged between the two piston-cylinder units which apply the holding force with the same direction of action and the piston force is connected via one each with the knee joint of each toggle lever this and on the other hand with the piston rod of the piston-cylinder unit connected pull and push rods is branched.
  • This Proposed mechanical elements are largely used, which require little maintenance with high operational reliability and are not only inexpensive, but also robust.
  • the use of two short-stroke clamping-piston-cylinder units in connection with the piston-cylinder unit arranged in between for the adjustment of the articulated lever allows a compact, space-saving construction with favorable introduction of the forces. It is even conceivable and advantageous to apply different hydraulic pressures to the tensioning piston-cylinder units in order, for. B. compress the actual compression shell area more firmly by higher pressure.
  • the toggle lever or arms are preferably secured in their extended position against buckling. This can be done, for example, in that the articulation points of the toggle lever are placed in such a way that when the holding force is applied, the toggle lever is overstretched against a stop, so that there can be no unintentional buckling of the toggle lever.
  • the C-press frame 1 is designed in a known manner. Inside the opening of the C-frame the press table 2 is mounted below and the crosshead 3 above. The lower die half 5 is connected to the press table 2, the upper die half 4 is attached to the crosshead 3. The crosshead 3 is vertically displaceable in guides, not shown, so that in the closed position of the die halves (FIG. 2) the halves complement each other to form a stepped bore.
  • a pair of hydraulic tensioning cylinders 6 and 7 are fastened to the C-shaped frame 1, each cylinder being fastened to the frame 1 by means of a crossmember 8 (FIG. 3).
  • the two upper levers 9 and 10 of the toggle lever are articulated on the piston rods 11 and 12 of the piston-cylinder units 6 and 7, and the lower levers 13 and 14 of the toggle lever are articulated on the crosshead, the articulation points of the toggle levers 9, 13 and 10, 14 are denoted by 15 and 16.
  • the piston-cylinder unit 17 with the piston rod 18 is vertically mounted in the middle, which serves to drive the toggle levers.
  • the knee joints 15 and 16 of the toggle levers are connected to one another via push-pull rods 19, 20, the free ends of the push-push rods 19, 20 being fastened to a common joint 21, on which the piston rod 18 of the piston-cylinder unit 17 is also located is articulated.
  • the compression mandrel 22 (the drive means of which are not shown) is axially aligned with the split die.
  • Fig. 1 the open position of the tube end press is shown.
  • the piston-cylinder unit 17 is acted upon by hydraulic fluid in such a way that the piston rod 18 in its extended position spreads the push-pull rods 19, 20 beyond the articulation point 21 and thus causes the toggle levers 9, 13 and 10, 14 to buckle.
  • the crosshead 3 is pulled upwards in the guides (not shown) and the tube to be compressed can be inserted into the lower die 5 of the press table 2.
  • the piston becomes. with the piston rod 18 moved upwards, the articulation point 21 between the piston rod 18 and the pull and push rods 19, 20 also moving upward and the pull and push rods 19, 20 articulated on the knee joint points 15 and 16 stretching the toggle levers 9 , 13 and 10, 14 effect.
  • the crosshead 3 with the upper die half 4 is briefly moved downward and brought into a position in which the upper die half 4 lies almost against the pipe end to be compressed.
  • the pivot points 15 and 16 are held at a distance X (Fig. 2) in such a way that the knee joint points 15 and 16 beyond the connecting line of the upper and lower pivot points of the levers 10 and 14 or 9 and 13 of the respective Lie toggle lever and the applied holding force causes the toggle lever to be placed against the stop described above.
  • the stretched toggle lever By introducing hydraulic fluid through the inlet openings 24 and 25 of the piston-cylinder units 6 and 7, the stretched toggle lever covers the remaining way until the upper die half 4 is placed against the pipe end and by further loading of the piston-cylinder units 6 and 7 stretched the pipe. If necessary, the piston rod 18 or the entire piston-cylinder unit 17 can be readjusted in accordance with the path required for the clamping.
  • the compression mandrel 22 is moved in the direction of arrow 26 by means (not shown) in order to upset the pipe end clamped between the upper and lower die halves 4 and 5.
  • the crosshead 3 is returned to its open position in the reverse order.
  • the compression mandrel 22 is returned to its starting position, the pressure acting on the piston-cylinder unit 6 and 7 is removed and the annular surfaces on the piston rod side of the piston-cylinder unit are pressurized via the openings 26 and 27, respectively.
  • the pistons 11 and 12 move into their upper end position and the clamping force on the pipe end is released.
  • the piston rod 18 is guided downwards with the articulation point 21, as a result of which the push-pull rods 19 and 20 spread and cause the toggle levers 9, 13 and 10, 14 to buckle. This briefly raises the crosshead 3 with the upper die half 4 and the tube end press is open for removal and reloading.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Jigs For Machine Tools (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Claims (5)

1. Dispositif de serrage pour les parties d'extrémités de tubes dans une presse à extrémités de tubes hydraulique, qui présente un cadre en forme de C (1), dans lequel l'extrémité du tube est maintenue entre les demi-matrices supérieure et inférieure (4, 5), la demi-matrice inférieure (5) étant reçue dans la table de presse et la demi-matrice supérieure (4) dans la traverse et la traverse étant déplaçable par rapport à la table de presse à l'aide d'au moins une unité à cylindre et piston (6, 7) fournissant la force de serrage, caractérisé par un levier coudé (9, 13, 10, 14) transmettant, en position tendue, la force de serrage, dont l'une des extrémités (9, 10) est liée de façon articulée au piston (11, 12) de l'unité à cylindre et piston (6, 7) et l'autre extrémité (13,14) est articulée de la même façon sur la traverse et dont la genouillère (15, 16) se trouve en liaison avec un autre entraînement mécanique (17) pour plier et tendre ledit levier (9, 13, 20, 14).
2. Dispositif de serrage selon la revendication 1, caractérisé en ce que, pour deux genouillères (9, 13, 10, 14) agencées symétriquement à côté l'une de l'autre, il est prévu un entraînement mécanique (17) commun pour replier et tendre les deux genouillères de façon synchrone.
3. Dispositif selon les revendications 1 et 2, caractérisé en ce que l'entraînement mécanique (17) pour replier et tendre la ou les genouillères (9, 13, 10, 14) est une unité à cylindre et piston.
4. Dispositif de serrage selon la revendication 2, caractérisé en ce que l'unité à cylindre et piston (17) est agencée entre les deux unités à cylindre et piston (6, 7) procurant la force de serrage avec le même sens d'action et que la force du piston est divisée par l'intermédiaire, à chaque fois, d'une tige de traction et de compression (19, 20) se trouvant reliée avec la genouillère (15, 16) du levier articulé (9,13,10,14), d'une part avec celui- ci et d'autre part avec la tige de piston (18) de l'unité à cylindre et piston (17).
5. Dispositif de serrage selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il est prévu une sécurité pour le ou les leviers articulés (9, 13, 10, 14) en position étirée contre le pliage.
EP83730001A 1982-01-06 1983-01-04 Dispositif de serrage d'extrémités de tubes dans une presse hydraulique à refouler les extrémités de tubes Expired EP0083577B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83730001T ATE12899T1 (de) 1982-01-06 1983-01-04 Haltevorrichtung fuer die rohrendstuecke in einer hydraulischen rohrendenpresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3200361A DE3200361C2 (de) 1982-01-06 1982-01-06 Haltevorrichtung für die Rohrendstücke in einer hydraulischen Rohrendenpresse
DE3200361 1982-01-06

Publications (2)

Publication Number Publication Date
EP0083577A1 EP0083577A1 (fr) 1983-07-13
EP0083577B1 true EP0083577B1 (fr) 1985-04-24

Family

ID=6152760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730001A Expired EP0083577B1 (fr) 1982-01-06 1983-01-04 Dispositif de serrage d'extrémités de tubes dans une presse hydraulique à refouler les extrémités de tubes

Country Status (4)

Country Link
EP (1) EP0083577B1 (fr)
JP (1) JPS58119426A (fr)
AT (1) ATE12899T1 (fr)
DE (1) DE3200361C2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2800651B1 (fr) * 1999-11-04 2002-01-25 Financ Robolix Machine a former des extremites de tubes, et dispositif de formage comportant deux desdites machines a former
CA2350731C (fr) 2000-06-16 2004-12-07 Toyota Jidosha Kabushiki Kaisha Appareil et methode de verrouillage de moules
JP4706889B2 (ja) * 2000-11-01 2011-06-22 東洋製罐株式会社 缶胴成形装置
CN100484746C (zh) * 2006-12-26 2009-05-06 西安重型机械研究所 非开挖钻杆加厚液压机
CN102896211A (zh) * 2011-12-30 2013-01-30 中山市奥美森工业技术有限公司 一种圆管夹具
CN102989818B (zh) * 2011-12-31 2015-11-18 奥美森智能装备股份有限公司 一种椭圆管机的夹紧装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871734A (en) * 1956-02-29 1959-02-03 Western Electric Co Apparatus for heading tubular members
DE2731055A1 (de) * 1976-07-16 1978-01-26 Mannesmann Ag Hydraulische rohrendenstauchpresse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037604A (en) * 1933-06-30 1936-04-14 Thompson Prod Inc Electrical metal gathering machine
DE844241C (de) * 1950-05-31 1952-07-17 Eumuco Ag Fuer Maschb Nachgiebige Spannvorrichtung fuer Stangen, Rohre u. dgl.
DE835246C (de) * 1950-06-30 1952-03-31 Rheinische Roehrenwerke A G Selbsttaetige Einspannvorrichtung an Stauchpressen fuer die Bearbeitung der Enden langgestreckter Koerper, beispielsweise der Enden von Rohren
US3078906A (en) * 1960-05-27 1963-02-26 Western Electric Co Machine for flanging tubular members
DE1240370B (de) * 1962-08-22 1967-05-11 David Etchells Machinery Ltd Horizontale Schmiede- bzw. Stauchmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871734A (en) * 1956-02-29 1959-02-03 Western Electric Co Apparatus for heading tubular members
DE2731055A1 (de) * 1976-07-16 1978-01-26 Mannesmann Ag Hydraulische rohrendenstauchpresse

Also Published As

Publication number Publication date
DE3200361A1 (de) 1983-07-14
JPS58119426A (ja) 1983-07-15
DE3200361C2 (de) 1984-08-30
ATE12899T1 (de) 1985-05-15
EP0083577A1 (fr) 1983-07-13

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