EP0314936A2 - Procédé et machine pour la déformation plastique de pièces tubulaires - Google Patents

Procédé et machine pour la déformation plastique de pièces tubulaires Download PDF

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Publication number
EP0314936A2
EP0314936A2 EP88116644A EP88116644A EP0314936A2 EP 0314936 A2 EP0314936 A2 EP 0314936A2 EP 88116644 A EP88116644 A EP 88116644A EP 88116644 A EP88116644 A EP 88116644A EP 0314936 A2 EP0314936 A2 EP 0314936A2
Authority
EP
European Patent Office
Prior art keywords
tube
tool
axis
platform
machine
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.)
Granted
Application number
EP88116644A
Other languages
German (de)
English (en)
Other versions
EP0314936A3 (en
EP0314936B1 (fr
Inventor
Alessandro Ferrari
Matteo Piccoli
Giancarlo Aliprandi
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.)
BLM SpA
Original Assignee
BLM SpA
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Filing date
Publication date
Application filed by BLM SpA filed Critical BLM SpA
Publication of EP0314936A2 publication Critical patent/EP0314936A2/fr
Publication of EP0314936A3 publication Critical patent/EP0314936A3/de
Application granted granted Critical
Publication of EP0314936B1 publication Critical patent/EP0314936B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning

Definitions

  • the above invention relates to a method and a machine for the plastic deformation of tubular bodies.
  • a pipe widening machine or pipe forming machine of the type series AST 38, AST, 102, AST 130 from the applicant is already available on the market for carrying out the aforementioned deformation processes.
  • the known machines consist of a collet with which the pipe piece is clamped.
  • the known machines have a turret-like head, which is directed towards the end of the tube to be deformed.
  • the turret has a number of tools for punching out, calibrating and generally deforming the pipe end.
  • the entire turret head After clamping the pipe piece to be deformed and a controlled positioning of the turret (in such a way that the suitable tool for the deformation process is arranged exactly coaxially with respect to the longitudinal axis of the pipe to be deformed), the entire turret head performs a longitudinal stroke on the end of the clamped pipe out.
  • the desired plastic deformation is carried out by one or more machining processes, for example a tapering, widening, formation of a projecting flange, drilling, widening or conical deformation of the end piece of the tube.
  • the known machines have the essential disadvantage that different tools have to be provided for each deformation process and for each tube diameter, which tools are to be mounted on a platform of the turret head, in accordance with the machining processes to be carried out.
  • the known machine is thus very limited in terms of the deformation processes that can be carried out.
  • the known machines which are equipped with deformation tools, which are fastened on a revolver-like platform, which is displaceably mounted in the longitudinal direction, also have the disadvantage that frequently complicated deformation processes which require repeated, step-wise deformation (to carry out a gradual deformation) are not feasible. Furthermore, the known machines operate under considerable disturbing noise development. The hourly performance of the deformed workpieces is limited, the known machines represent a cost that should not be underestimated, due to the need to provide a complex hydraulic unit.
  • the object of the above invention is to propose a new method and a new machine with which it is possible to avoid the disadvantages of the prior art and to create the possibility of using a very large number of different parts, if possible using a single workpiece
  • Deformation processes also to be carried out with a complex geometric design.
  • the possibility should be created to adapt technical processing sizes quickly and easily to the various deformation processes and the characteristics of the pipe piece to be deformed, as well as to the material properties of the pipes, in order to create great flexibility with regard to the deformation processes which can be carried out.
  • the machine identified overall by 1 consists of a machine bed 2 which has a vice 3 on one side in which the tube 4, the end 4a of which is to be subjected to plastic deformation, is clamped.
  • the vice 3 is assigned a stop 5 which is designed in the manner of a flap 5 which is designed to be pivotable upwards and downwards. This component will be described in more detail below.
  • the end 4a of the tube 4 is also assigned a heating device 6 for heating the tube piece. This device will also be described in more detail below.
  • the machine frame 2 of the machine 1 has horizontal guides 7 which slidably (along the axis X) accommodate a processing unit or a processing support, which is identified overall by 8.
  • the processing unit 8 is operatively connected to a threaded spindle 9, advantageously a ball screw 9, in order to ensure maximum precision for the displacement of the processing unit 8 in the direction of the axis X.
  • the ball screw is advantageously operatively connected to a drive motor 11 with the interposition of a reduction gear 10.
  • the motor 11 is advantageously designed as a controllable motor, for example as a DC motor.
  • the processing unit 8 receives a platform 1 which can rotate about an axis marked B.
  • the rotary drive of the platform 12 is accomplished by means of a drive motor 13 which, for example, acts on the spindle 15, which is connected to the platform, via a toothed belt 14 which is arranged in the interior of the unit 8 12 is connected.
  • the motor 13, if it should be necessary, is designed as a controllable DC motor.
  • the rotating platform 12 receives a carriage 16 which is arranged to be movable in the direction of the Z axis, i.e. radial to the platform 12.
  • the radial displacement of the carriage 16 is accomplished with the aid of a drive motor 17.
  • This motor is also advantageously designed as a controllable DC motor.
  • the motors 11, 13, 17 are operatively connected to an NC control device, which is identified overall by 18. Furthermore, an encoder known per se or a similar display device is assigned to each motor. These devices are known to the person skilled in the art. For this reason, they are not shown and described in more detail.
  • the slide 16 of the platform 12 receives at least one tool 19 for the plastic deformation of the end piece 4a of the pipe piece 4.
  • this platform can also be equipped with a further tool 19 ', as is shown with broken lines.
  • the structure of the deformation tools 19, 19 ' will be described in more detail below.
  • the machine 1 can be seen in a front view in the direction of the arrow 11 according to FIG. 1, i.e. in the direction of entry of the pipe section 4 into the vice 3.
  • the machine frame is equipped with a vice, which is marked with 3 in total.
  • the vice 3 has Clamping jaws 20 for tightening the tube 4; and the clamping jaws 20 can be actuated in the horizontal direction with the aid of a hydraulic piston-cylinder unit.
  • the vice 3 has a slide-like device 22 which is provided with jaws 20 which are provided with a larger and a smaller through hole.
  • the jaws 20 are operatively connected to lifting rods 23, which can be driven by further piston-cylinder units 24, in order to enable the jaws 20 to be moved upwards or downwards (arrow g).
  • the jaws with a large bore diameter or the jaws with a small bore diameter are brought into the clamping position in alignment with the axis B of the tube piece.
  • the processing unit 8 has an arm 5, designed in the manner of a flap, which can carry out a pivoting movement from top to bottom (arrow f). If the arm 5 is arranged in a raised position, as shown in Fig. 2, it is in the rest position, the arm 5 is pivoted downwards (arrow f), it is in alignment with the axis B. This forms the body of the Armes 5 a stop 5 ', which makes it possible to position the end 4a of the pipe piece 4 exactly when entering the machine, ie the end piece 4a of the pipe 4 is always in exact location relative to the tools 19, 19 '(not shown in Fig. 2) arranged.
  • the lower part of the arm 5 has a heating device 6 which consists of openable and closable jaws which are controlled, e.g. with the help of lever rods 25 and a piston-cylinder unit 26 can be driven.
  • the heating device 6 can work electrically-inductively, or in a known manner using gas burners which, for certain deformation processes, allow the end piece 4a of the tube 4, which is arranged in the vice 3, to be heated.
  • actuating device of the processing unit 8 is shown schematically.
  • the processing unit 8 is slidably mounted on guides 7. Furthermore, the processing unit 8 is operatively connected to a drive spindle 9, advantageously a ball screw.
  • the ball screw 9 is set in rotation by a controllable motor 11, whereby a controlled and positionally controlled displacement of the processing unit 8 in the direction of the axis X is possible.
  • the drive motor 11 cooperates with a position detection device, for example an encoder (not shown), which always allows the position of the processing unit 8 and thus the position of the workpiece 19 to be machined with respect to the end 4a of the pipe piece 4 to be machined ascertain.
  • a position detection device for example an encoder (not shown)
  • the rotatable platform 12 is mounted in the body of the processing unit 8 using roller bearings 27 and, using a toothed belt 14 and a drive motor 13, the drive takes place.
  • the motor 13 is also designed as a controllable DC motor, which makes it possible to vary the speed of the platform 12 in a controlled manner.
  • the platform 12 receives a slide 16 which can be moved in the direction of the arrow Z.
  • the slide 16 has a toothed rack 29 on the side opposite the tool 19, which meshes with a pinion 30.
  • the pinion is operatively connected to a rack 31, this rack is mounted inside the extended body 32 of the platform 12.
  • the rack 31 can be moved in the direction of the X axis.
  • the ball screw 33 is operatively connected to a threaded sleeve 40 and this threaded sleeve 40 is connected to a tubular component 41, which is displaceably mounted in the rotating component 32 in the longitudinal direction.
  • a stop arm 42 prevents the threaded sleeve 40 from rotating.
  • the rack 31 acts on the pinion 30, which moves the slide 16 in a controlled manner in the direction of the Z axis.
  • the motor 17 also has a device for indicating the position, e.g. an encoder is assigned, as a result of which the exact position of the slide 16 and thus of the tool 19 in the direction of the axis Z relative to the pipe piece 4, 4a is determined.
  • motors 11, 13 and 17 are designed as controllable motors and are operatively connected to an NC unit, which is identified in FIG.
  • FIG. 4 Figures 4 and 5, two tools 19, 19 'can be seen, which can be mounted on the carriage 16.
  • the tool 19 is equipped with a machining wheel 44, this wheel is rotatably arranged using roller bearings 35 and a support shaft 36 in a tool holder 37, the tool holder 37 can be fastened to the slide 16.
  • the tool 19 with the rotatable machining wheel 44 is used in particular to carry out external deformations of the end piece 4a of the tube 4, as shown in FIG. 4.
  • the tool 19 ' is advantageously provided as a pointed pen, which is particularly suitable for carrying out Umboertelungsvorgaenge to the inside of the tube.
  • the tool 19 ' is fastened by a grub screw 38 in a cylindrical component 39, which is arranged with the help of roller bearings 45 inside a tool carrier 46, which has a similar shape to the tool carrier 37 according to FIG. 4.
  • the only difference is that the axis of rotation of the tool 19 'coincides with the axis of the tube, the end 4a of which is to be deformed.
  • the end 4a of the tube 4 is deformed with the aid of the tool 19 in such a way that the edges of the end piece 4a of the tube are bent over in such a way that they are aligned perpendicular to the longitudinal axis of the tube.
  • the tool 19 rotates around the end 4a of the tube and at the same time an assembled movement is carried out in such a way that the tool is moved from the position shown with dashed lines to the position shown with solid lines; there is a controlled movement along the axes X and Z.
  • the movement sequence is controlled via the NC unit 18.
  • the controlled movement along the axis X is carried out via the drive motor 11 and the threaded spindle 9, which moves the processing unit 8.
  • the displacement movement along the Z axis is carried out by the drive motor 17, the threaded spindle 33, the toothed rack 31 and, and the slide 16.
  • the plastic deformation of the end piece 4a of the tube 4 can also be carried out by a plurality of deformation processes which follow one after the other, as is shown by a number of dash-and-dot lines which are identified by R; i.e. the deformation can gradually be initiated in such a way that the tool 19 rotating around the tube 4 is gradually moved both in direction (Z) and in direction (X) until the tube (as for the lower half of the tube), was deformed (see Fig. 6).
  • FIGS. 8-22 show various possibilities for deformation processes to be carried out, which can be carried out with the device according to the invention.
  • the deformation process is carried out using one or at most two tools. Both the rotary movement of the tool and the axial and transverse displacement of the tool are controlled and monitored by an NC control unit.
  • This NC unit can store an unlimited number of processing sizes for different materials and different deformation processes, these processing sizes can be called up immediately for each processing process.
EP88116644A 1987-10-09 1988-10-07 Procédé et machine pour la déformation plastique de pièces tubulaires Expired - Lifetime EP0314936B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2219087 1987-10-09
IT22190/87A IT1223306B (it) 1987-10-09 1987-10-09 Procedimento e macchina per la deformazione plastica di corpi tubolari

Publications (3)

Publication Number Publication Date
EP0314936A2 true EP0314936A2 (fr) 1989-05-10
EP0314936A3 EP0314936A3 (en) 1990-07-11
EP0314936B1 EP0314936B1 (fr) 1993-06-30

Family

ID=11192821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116644A Expired - Lifetime EP0314936B1 (fr) 1987-10-09 1988-10-07 Procédé et machine pour la déformation plastique de pièces tubulaires

Country Status (4)

Country Link
EP (1) EP0314936B1 (fr)
DE (1) DE3882113D1 (fr)
ES (1) ES2043757T3 (fr)
IT (1) IT1223306B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462719A2 (fr) * 1990-06-07 1991-12-27 Mcdermott International, Inc. Machine pour former un dispositif de guidage d'une colonne montante
US6295856B1 (en) * 1998-10-30 2001-10-02 Sango Co., Ltd. Spindle mechanism of drawer
US7216521B2 (en) * 2002-08-28 2007-05-15 Kiyoshi Ogawa Composite fabrication facility of steel tube and fabrication method of steel tube

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061009A (en) * 1976-11-10 1977-12-06 Kaporovich Vladimir Georgievic Machine for spinning tubular workpieces
EP0010057A1 (fr) * 1978-10-11 1980-04-16 Heinz Blaser Procédé et machine pour le fluotournage de coudes de tuyaux sans soudure à parois mince
FR2490119A1 (fr) * 1980-06-26 1982-03-19 Kramatorsky Ind Institu Procede d'obtention, dans une ebauche tubulaire, d'une paroi en bout presentant un creux concentrique et produit tubulaire ainsi obtenu
JPS57165130A (en) * 1981-04-04 1982-10-12 Minoru Nakamura Spinning device
JPS5961529A (ja) * 1982-09-29 1984-04-07 Matsushita Electric Works Ltd スピニング加工制御装置
EP0190958A2 (fr) * 1985-01-30 1986-08-13 Motor Wheel Corporation Procédé et appareil pour préparer le bord d'ébauches de fluotournage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061009A (en) * 1976-11-10 1977-12-06 Kaporovich Vladimir Georgievic Machine for spinning tubular workpieces
EP0010057A1 (fr) * 1978-10-11 1980-04-16 Heinz Blaser Procédé et machine pour le fluotournage de coudes de tuyaux sans soudure à parois mince
FR2490119A1 (fr) * 1980-06-26 1982-03-19 Kramatorsky Ind Institu Procede d'obtention, dans une ebauche tubulaire, d'une paroi en bout presentant un creux concentrique et produit tubulaire ainsi obtenu
JPS57165130A (en) * 1981-04-04 1982-10-12 Minoru Nakamura Spinning device
JPS5961529A (ja) * 1982-09-29 1984-04-07 Matsushita Electric Works Ltd スピニング加工制御装置
EP0190958A2 (fr) * 1985-01-30 1986-08-13 Motor Wheel Corporation Procédé et appareil pour préparer le bord d'ébauches de fluotournage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 5 (M-184)[1150], 11. Januar 1983; & JP-A-57 165 130 (MINORU NAKAMURA) 12-10-1982 *
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 166 (M-314)[1603], 2. August 1984; & JP-A-59 61 529 (MATSUSHITA DENKO K.K.) 07-04-1984 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0462719A2 (fr) * 1990-06-07 1991-12-27 Mcdermott International, Inc. Machine pour former un dispositif de guidage d'une colonne montante
EP0462719A3 (fr) * 1990-06-07 1992-01-15 Mcdermott International, Inc. Machine pour former un dispositif de guidage d'une colonne montante
US6295856B1 (en) * 1998-10-30 2001-10-02 Sango Co., Ltd. Spindle mechanism of drawer
US7216521B2 (en) * 2002-08-28 2007-05-15 Kiyoshi Ogawa Composite fabrication facility of steel tube and fabrication method of steel tube

Also Published As

Publication number Publication date
EP0314936A3 (en) 1990-07-11
IT1223306B (it) 1990-09-19
ES2043757T3 (es) 1994-01-01
EP0314936B1 (fr) 1993-06-30
IT8722190A0 (it) 1987-10-09
DE3882113D1 (de) 1993-08-05

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