EP0114924B1 - Vorrichtung zur hydroplastischen Verformung eines rohrförmigen Rohlings - Google Patents

Vorrichtung zur hydroplastischen Verformung eines rohrförmigen Rohlings Download PDF

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Publication number
EP0114924B1
EP0114924B1 EP83107906A EP83107906A EP0114924B1 EP 0114924 B1 EP0114924 B1 EP 0114924B1 EP 83107906 A EP83107906 A EP 83107906A EP 83107906 A EP83107906 A EP 83107906A EP 0114924 B1 EP0114924 B1 EP 0114924B1
Authority
EP
European Patent Office
Prior art keywords
blank
pressure
work tool
piston
plunger
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
EP83107906A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0114924A3 (en
EP0114924A2 (de
Inventor
Georgi Kostov Dipl.-Ing. Petkov
Todor Stojkov Dipl.-Ing. Todorov
Jordanka Pusseva Dipl.-Ing. Atanassova
Nikola Mirtschev Dipl.-Ing. Nezov
Stefan Kolev Dipl.-Ing. Deevski
Nikola Ivanov Dipl.-Ing. Radev
Botjo Pentschev Dipl.-Ing. Botev
Georgi Metev Dipl.-Ing. Metev
Ivan Christov Dipl.-Ing. Najdenov
Jakim Najdenov Dipl.-Ing. Petrov
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.)
NPSP po Hydroplastichna Obrabotka na Metalite
Original Assignee
NPSP po Hydroplastichna Obrabotka na Metalite
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 NPSP po Hydroplastichna Obrabotka na Metalite filed Critical NPSP po Hydroplastichna Obrabotka na Metalite
Publication of EP0114924A2 publication Critical patent/EP0114924A2/de
Publication of EP0114924A3 publication Critical patent/EP0114924A3/de
Application granted granted Critical
Publication of EP0114924B1 publication Critical patent/EP0114924B1/de
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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly
    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
    • 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
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • 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
    • B21D26/045—Closing or sealing means
    • 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
    • B21D26/06—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 by shock waves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure
    • Y10T29/49806—Explosively shaping

Definitions

  • the invention relates to a device for hydroplastic deformation of a tubular blank. Such devices are used in metallurgy and mechanical engineering.
  • a device for deforming a blank which consists of a work tool with a central basic bore and radial channels, which are connected to the central basic bore, whereby pressure lubrication of the machined surface and work tool is achieved.
  • the blank lies in a die with a profiled inner surface; both are mounted on a movable support.
  • the work tool is movably connected and sealed with a piston with a central channel of a vertical feed cylinder. This central channel is in turn connected to a pressure chamber formed in the vertical feed cylinder, which is connected by channels to an input system for the working medium.
  • These channels are formed in a housing attached to the vertical feed cylinder.
  • the housing is attached to a press driving the vertical feed cylinder and the working tool.
  • a disadvantage of the above-mentioned device is that a high pressure which exceeds the yield point of the material of the blank to be processed cannot be achieved.
  • the achievable high pressure is limited by the area of the pressure chamber and the possible piston loads.
  • the area of this chamber would have to be reduced, which would result in a reduction in the piston cross-section.
  • this is not possible from a technical point of view and due to the achievable material strength parameters.
  • a device for deforming materials by high pressure pulses in which a flat workpiece is hydraulically pressed into a die.
  • the pressure impulses generated thereby act evenly and simultaneously at all points on the surface to be processed.
  • This previously known device is not very suitable for the hydroplastic deformation of a tubular blank.
  • DE-A-1932430 has disclosed a device for shaping tubular workpieces, in which the workpiece is placed in a mold cavity whose limiting surface corresponds to the surface shape of the workpiece to be achieved.
  • a pressure device which serves to generate the deformation forces and which expands the tubular workpiece radially to the delimiting surface.
  • This pressure device is equipped with a device for generating a pressure surge, under the influence of which the outer surface of the workpiece and the inner surface of the mold delimiting the mold cavity come into contact with one another.
  • the blank is simultaneously subjected to pressure pulses over its entire axial length. An extraordinary pressing force is therefore required to achieve the desired degree of deformation.
  • the object of the present invention is to provide a device for the hydroplastic deformation of tubular blanks, in which the pressure pulses are controlled in the axial direction of the blank and act primarily radially on the inside of the blank.
  • a device for the hydroplastic deformation of a tubular blank with a die into which the blank is inserted, a working tool with a circumferential annular groove, which together with the blank forms a closed deformation space, a central basic bore, which with a pressure chamber is connected, and radial channels, which extend from the central bore into the annular groove, further with a feed cylinder, in which the pressure chamber is formed, which is delimited by a piston connected to the working tool, and one on the hydraulic pressure medium in the plunger acting on the pressure chamber, which is connected to a pulse transmitter.
  • the pressure pulses triggered by the plunger and the associated pulse generator in the hydraulic pressure medium in the pressure chamber are conducted via the central basic bore and the radially outgoing channels into the circumferential annular groove of the working tool.
  • the pressure pulses are only effective in the closed deformation space, which is formed by the circumferential annular groove on the work tool together with the blank.
  • the axial position in which the pressure impulses act on the blank can be controlled easily and precisely by means of variable penetration depth of the working tool into the interior of the blank. Since the pressure pulses applied have a precisely defined direction and are therefore highly concentrated, and they can also be controlled by moving the work tool in the longitudinal direction of the blank to be machined, the requirements for the use of hydraulic forging are given. As a result, the degree of hydroplastic deformation at a given, Available pressing force can be increased significantly. The effectiveness of the forming process is sustainably increased, so that the production of very high quality products is possible.
  • the radial channels in the work tool are provided with throttle elements. These throttle elements, which act as a valve, are only fully opened after the work tool has entered the blank in a coaxial manner.
  • An embodiment is particularly preferred in which the plunger and the pulse transmitter are installed in the piston of the feed cylinder.
  • the feed cylinder is attached to the movable part of a press.
  • the device shown in Fig. 1 consists of a feed cylinder 1, in which a pressure chamber 2 is formed and which is provided with a ventilation channel 3 and with a channel for the input of working medium 4.
  • a piston 5 with a throttled central bore is installed in the feed cylinder 1.
  • the radial channels 8 are connected to an annular groove 9 of the working tool 6.
  • the feed cylinder 1 is rigidly attached to the movable part of a press 11 by a bracket 10.
  • the blank 13 is inserted coaxially to the working tool 6 into a die 12 with a profiled or non-profiled inner surface.
  • the front end of the working tool 6 is inserted into the blank 13, wherein closed deformation spaces are formed by the annular groove 9 and the blank 13.
  • a plunger 14 is installed and sealed in the feed cylinder 1, through which the pressure chamber 2 is connected to a pulse generator or transmitter 15 mounted on a drive mechanism 16.
  • the pressure chamber 2 is formed in the work tool 6.
  • Pulse transmitter 15 and plunger 14 are installed in the piston 5 of the feed cylinder 1.
  • the radial channels 8 of the work tool 6 are provided with a throttle element 17.
  • the work tool for processing the outer surface is designed analogously to that intended for processing the inner surface.
  • the device shown in FIG. 1 operates as follows: the blank 13 is inserted into the die 12 and the working tool 6 is placed coaxially on the blank 13.
  • Working medium is entered into the system through the channel 4, the pressure chamber 2 is filled and the piston 5 is pushed into the end position.
  • the feed cylinder 1 is vented through the channel 3, after which the press 11 moves downward, the piston 5 with the working tool 6 being displaced downward until it is pressed and sealed.
  • the annular groove 9 is filled with working medium through the central basic bore 7 and the radial channels 8 of the working tool 6.
  • the pressing tool F sinks the work tool 6 downwards and into the blank 13, the upper end of which is plastically deformed.
  • the impulse effect of the working medium in the longitudinal direction of the machined blank 13 is controlled by the movement of the working tool 6.
  • it is possible to apply impulses to given zones of the blank in a certain unit of time are similar to hydraulic forging.
  • the device according to the embodiment shown in FIG. 2 operates as follows: the blank 13 is inserted into the die 12, and the work tool 6, the pressure chamber 2 of which is filled with working medium and vented, is placed in the die 12. A pressing force is applied to the piston 5, as a result of which the working tool 6 penetrates into the blank 13, the annular groove 9 being closed by the inner surface of the blank 13. The space created in this way is filled with working medium by the throttle valve 17. After the working tool 6 has completely penetrated into the blank 13, the throttle valve 17 is opened completely and the pulse transmitter 15 is switched on. A pre-high pressure is built up in the pressure chamber 2 by the pressing force F, and under the action of the pulse transmitter 15, additional amounts of working medium are pressed into the annular groove 9 under increased pressure and thus perform a hydroplastic deformation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP83107906A 1983-01-26 1983-08-10 Vorrichtung zur hydroplastischen Verformung eines rohrförmigen Rohlings Expired EP0114924B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG59472/83 1983-01-26
BG8359472A BG39831A1 (en) 1983-01-26 1983-01-26 Method and device for processing of blanks by hydroplastic forming

Publications (3)

Publication Number Publication Date
EP0114924A2 EP0114924A2 (de) 1984-08-08
EP0114924A3 EP0114924A3 (en) 1984-11-14
EP0114924B1 true EP0114924B1 (de) 1987-11-25

Family

ID=3911675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107906A Expired EP0114924B1 (de) 1983-01-26 1983-08-10 Vorrichtung zur hydroplastischen Verformung eines rohrförmigen Rohlings

Country Status (7)

Country Link
US (1) US4619129A (xx)
EP (1) EP0114924B1 (xx)
JP (1) JPS59137142A (xx)
BG (1) BG39831A1 (xx)
DD (1) DD246895A7 (xx)
DE (1) DE3374667D1 (xx)
SU (1) SU1417963A1 (xx)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856311A (en) * 1987-06-11 1989-08-15 Vital Force, Inc. Apparatus and method for the rapid attainment of high hydrostatic pressures and concurrent delivery to a workpiece
US4942750A (en) * 1989-01-23 1990-07-24 Vital Force, Inc. Apparatus and method for the rapid attainment of high hydrostatic pressures and concurrent delivery to a workpiece
DE4322595C2 (de) * 1993-07-07 1998-04-16 Schaefer Hydroforming Gmbh Vorrichtung zum Herstellen von Hohlkörpern nach dem Innenhochdruckumformverfahren
DE19521101A1 (de) * 1995-06-09 1996-12-12 Rexroth Mannesmann Gmbh Hydraulische Druckübersetzereinheit, insbesondere für eine nach dem Innenhochdruckumformverfahren arbeitende Presse
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US5992197A (en) * 1997-03-28 1999-11-30 The Budd Company Forming technique using discrete heating zones
DE19805172C2 (de) 1998-02-10 2001-06-07 Daimler Chrysler Ag Vorrichtung zum Innenhochdruck-Umformen eines Werkstückes
US6006568A (en) * 1998-03-20 1999-12-28 The Budd Company Multi-piece hydroforming tool
US6098437A (en) * 1998-03-20 2000-08-08 The Budd Company Hydroformed control arm
US6209372B1 (en) 1999-09-20 2001-04-03 The Budd Company Internal hydroformed reinforcements
US8746028B2 (en) * 2002-07-11 2014-06-10 Weatherford/Lamb, Inc. Tubing expansion
GB0306774D0 (en) * 2003-03-25 2003-04-30 Weatherford Lamb Hydraulically assisted tubing expansion
US7350585B2 (en) * 2001-04-06 2008-04-01 Weatherford/Lamb, Inc. Hydraulically assisted tubing expansion
GB0108934D0 (en) * 2001-04-10 2001-05-30 Weatherford Lamb Downhole Tool
DE50202209D1 (de) * 2002-01-17 2005-03-17 Alcan Tech & Man Ag Innenhochdruck-Umformvorrichtung und Verwendung derselben
GB2399839B (en) * 2003-03-25 2007-07-11 Weatherford Lamb Tubing expansion
JP6098493B2 (ja) * 2013-12-03 2017-03-22 株式会社デンソー 鍛造装置
US10279386B2 (en) * 2014-12-09 2019-05-07 Sandvik Intellectual Property Ab Method and arrangement for manufacturing of tubes by continuous hydraulic expansion
ITUA20162257A1 (it) * 2016-04-01 2017-10-01 Bertini Macch S R L Macchina per la formatura e per la sagomatura di un tubolare metallico, come un tubo
CN106734493B (zh) * 2016-12-20 2018-06-26 桂林电子科技大学 一种胀形压力脉动加载的中小型内高压成形机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652616A1 (de) * 1968-02-17 1971-04-01 Bolt Associates Inc Verfahren und Vorrichtung zur Verformung von Werkstoffen durch hohe Druckimpulse
US3797294A (en) * 1968-09-25 1974-03-19 Continental Can Co Apparatus for hydraulic electrohydraulic forming of tubular elements
JPS554519B2 (xx) * 1972-10-06 1980-01-30
DE2705140C2 (de) * 1977-02-08 1979-12-20 Thyssen Industrie Ag, 4300 Essen Mit einem Strebförderer verbundene Rückvorrichtung für ein Schreitausbaugestell

Also Published As

Publication number Publication date
DE3374667D1 (en) 1988-01-07
EP0114924A3 (en) 1984-11-14
JPS59137142A (ja) 1984-08-07
EP0114924A2 (de) 1984-08-08
US4619129A (en) 1986-10-28
BG39831A1 (en) 1986-09-15
SU1417963A1 (ru) 1988-08-23
DD246895A7 (de) 1987-06-24

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