EP1005930B1 - Verfahren und Vorrichtung zum hydraulischen Umformen von Werkstücken - Google Patents

Verfahren und Vorrichtung zum hydraulischen Umformen von Werkstücken Download PDF

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Publication number
EP1005930B1
EP1005930B1 EP99123764A EP99123764A EP1005930B1 EP 1005930 B1 EP1005930 B1 EP 1005930B1 EP 99123764 A EP99123764 A EP 99123764A EP 99123764 A EP99123764 A EP 99123764A EP 1005930 B1 EP1005930 B1 EP 1005930B1
Authority
EP
European Patent Office
Prior art keywords
pressure
mould
workpiece
spacer ring
casing
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 - Lifetime
Application number
EP99123764A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1005930A1 (de
Inventor
Lonka Bürgel
Frank Schieck
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.)
KUKA Systems GmbH
Original Assignee
KUKA Werkzeugbau Schwarzenberg 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 KUKA Werkzeugbau Schwarzenberg GmbH filed Critical KUKA Werkzeugbau Schwarzenberg GmbH
Publication of EP1005930A1 publication Critical patent/EP1005930A1/de
Application granted granted Critical
Publication of EP1005930B1 publication Critical patent/EP1005930B1/de
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
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/025—Means for controlling the clamping or opening of the moulds
    • 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
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/029—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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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

Definitions

  • the invention relates at least to a method for forming a workpiece under high pressure liquid after Preamble of claim 1 and a device for forming at least one workpiece under high pressure liquid by means of a forming tool according to the preamble of claim 3.
  • DE 44 17 460 A1 shows a method for producing Sheet metal parts by loading sheet metal semi-finished products with a print medium.
  • the additional material requirement the deformation is not caused by weakening the material in this area but by flowing from another Area, i.e. plastic stretching of the material in the frame area were made.
  • the deformed workpiece in the outermost area still to be clamped so that the material requirement in the forming area just by reflow and not by moving material areas.
  • this requires a weakening of the material over the Afterflow area.
  • US 2 728 317 shows a device for hydraulic Forming with a pressure housing surrounding the mold.
  • the invention has for its object, while avoiding of the above-mentioned disadvantages a device for forming creating workpieces such as sheet metal blanks in particular, by means of which an optimal forming of a workpiece is possible.
  • the stated object is achieved using a method of the type mentioned at the beginning by the characteristic of Claim 1 solved.
  • the solution according to the invention ensures that initially when pressurized on one side of a workpiece (or between two workpieces) the required Flow of the workpieces is ensured on the other hand in the final shaping (calibration) the workpieces on the edge exposed and no longer have to be held, ' so that the complete workpiece shape the calibration process can be subjected. Because consciously to a maximum high-pressure tightness in the clamping area of the tools is waived, the tightness is replaced by a pressure-tight encapsulation of the tool, in particular by one that is separate from the forming tool and completely encloses it Pressure housing reached.
  • the Closing force of the tool is adjustable.
  • the closing force the forming tool can be set in this way become; that they are slightly below the opening force of the for final forming or calibration of the respective workpieces required calibration pressure. So that a controlled
  • the invention provides in further refinements before that drive device for moving tool parts and housing parts are separate facilities and that a small vertical play with the tool closed, including also spacer rings and plates as well Workpieces within the pressure housing is given and that the drive device (pressing device) for the housing a greater closing force has, as the drive device for the tool, so that the workpieces in the edge area through Tool can be clamped with a closing force that acts below the closing force with which the housing parts be kept closed.
  • both workpieces initially with an intermediate layer of a spacer clamped at the edge are.
  • the device provides that a part (lower part) of the Pressure housing on the inside a circumferential recess has and that another part (upper part) of the pressure housing a projection engaging in the recess has limited strength. This creates a high pressure seal created.
  • the lead is under on him liquid high pressure acting within the pressure housing radially outwards against the wall or shoulder the recess on the other part of the pressure housing, which means that the internal pressure increases Tightness is increased.
  • a low pressure seal can be provided. This is done by facing a seal between each other End faces of the parts of the pressure housing reached.
  • a low pressure seal can come in different Be trained. Either such that the seal is a seal made of solid, elastic material or that the seal is a fillable with pressure medium Hose seal is.
  • a further preferred embodiment of the invention provides before that between the upper and lower part of the forming tool a spacer ring is arranged so that a workpiece between part of the tool and the spacer ring can be clamped and possibly another workpiece between the spacer ring and the other part of the tool can be clamped is.
  • a spacer ring that the workpieces are also clamped in their tools
  • Edge areas mechanically in a desired manner can be deformed and, if two at the same time Workpieces are not deformed in their edge areas are deformed in the same or complementary manner have to.
  • the top and bottom of the spacer ring at least sometimes not parallel to each other and / or is not even.
  • the Spacer ring has a filling inlet. This will achieved that not between immediately one another lying sheet metal blanks an inlet for the hydraulic fluid in the space between the sheet metal blanks must be provided, the sheet metal blanks in this Inlet area in a shape not corresponding to its final shape but due to the need for admission Are shaped. With an inlet immediately between the edges of sheet metal blanks - as is the case with the Technology is the case - arise here, too Leakage problems. These disadvantages are compounded by the essentially radially or laterally through the spacer ring guided entry avoided.
  • the inlet can either with the interior of the pressure housing surrounding the forming tool communicate directly or else it can be provided that the filling inlet of the spacer ring with a filling passage of the pressure housing when closed Pressure housing and tool are aligned, in particular through a tight connection between the inlet of the Spacer ring and passage of the pressure housing Is marked.
  • the connection between Passage in the pressure housing and inlet in the spacer ring The socket is preferably fixed to the Spacer ring connected or integrally formed on this and engages with her the passage of the housing End, which is preferably formed as a circumferential collar is in an annular groove of the housing by two semicircular ring grooves in the upper and lower part of the Interfaces of the two parts can be formed.
  • a further preferred embodiment of the invention provides an extending, closable emptying outlet in front (through the wall of the pressure housing). Furthermore can the tool with spacer plates in between Pressure housing can be arranged.
  • the inventive device 1 for hydraulic Forming sheet metal blanks using High pressure has a pressure housing 2 consisting of a lower housing part 3 and an upper housing part 4 on. Between lower and upper housing parts 3 and 4 is a low pressure seal 6 made of one circumferentially closed sealing ring or a Sealing hose arranged which is suitable in two Trained grooves 7,7a of the lower and lower tool Upper part 3.4 is inserted. When training the Low-pressure seal 6 can be used as a sealing hose pressurized fluid inside.
  • a high pressure seal is formed, because when the high pressure is applied to the inside of the Housing 2 facing wall portion 9a of the projection 9 this against the inner paragraph 8 limiting Vertical wall of the lower housing part 3 is pressed tightly.
  • the upper housing part 4 has bushings 11 for Push pin on (Figure 1) or quick fill inlets for the pressure housing. Furthermore, it points a hydraulic fluid inlet 13 ( Figures 2.5) and one or more pressure relief outlets 12 ( Figure 1).
  • the former is by two corresponding ones semicircular grooves in each other closed end faces of housing lower and Upper part 3.4 created and forms when closed Housing a tubular passage.
  • the inside of the pressure housing 2 can through this also against extremely high pressure be reliably sealed.
  • the actual molding tool 21 for Forming sheet metal blanks 22,23 being in the Figure 1 by the compared to the sheet metal blank 22nd increased thickness of the sheet metal blank 23 and the Paragraphs in the marginal areas indicated is that the sheet metal blank 23 is a multilayer or sandwich sheet is concerned, the individual layers are at least partially welded can.
  • the tool 21 consists of a lower tool part 24 with a die formation 24a and one Tool upper part 26 with a die formation 26a, the form of the matrix in each case the shape of the device according to the invention High pressure forming sheet metal blanks determine.
  • the upper part of the housing spacer elements such as the spacer element 29 in the form of flat metal cuboids be arranged.
  • spacers can also be used on the bottom of the lower housing part 3 lie between this and the tool part 24.
  • the upper tool part 26 is via pressure bolts 31, through the openings 11 of the upper housing part 4 protrude through with a first press device (not shown) connected.
  • the upper part of the tool 4 is with a second press device (also not shown) connected, the higher one Can apply pressure than that the tool 21st press acting.
  • the Spacer ring 27 with a filling passage 32 as Filling ring formed ( Figure 5).
  • the inlet 32 in Spacer ring 27 is aligned with the passage 13 in Housing 2 and is with this via a socket 33rd connected so that the cavity between the sheets 24.26 directly with the hydraulic pressure filling device (not shown) is connected and not across the side gap 34 between Tool 21 and housing 2 - to flow the Sheet metal blanks 22, 23 in the edge clamping area to enable - this according to the invention not be clamped so much that a pressure-tight Closure of the interior of the tool outer, the space 34, can be effected a controlled in the illustrated embodiment Pressure difference between the high pressure interior, limited by sheet metal blanks to be deformed and spacer ring and the intermediate space 34, are shown, the pressure outlet 12th checked for example by means of a valve becomes.
  • passage can also 13 and inlet 32 only in the intermediate space 34 lead.
  • the device have or do not have an outlet 12 locked during operation of the device his.
  • the sheet metal blanks are formed according to the invention in the following way:
  • the housing 2 of the invention Device 1 in an open State as it can be seen in Figures 3 and 6 is.
  • the lower sheet metal blank 22 inserted.
  • the spacer ring 27 which is at a vertical distance from the Lower tool part 24 is located and is against Tool 24 driven.
  • the upper sheet metal blank 23 inserted.
  • the tool 21 is then closed by the tool upper part 26 is moved down. This is done if necessary - in the embodiment shown not level and not perpendicular to the closing direction End faces of tools and spacer ring - A mechanical free forming of the sheet metal blanks according to the contours of the tool parts and the spacer ring.
  • the tool 21 is filled, more precisely the space between sheet metal blanks 22,23 and spacer ring 27 with the working medium (Pressure fluid). Even the tubular low pressure seal is pressurized, so that it fulfills its function.
  • the working medium Pressure fluid
  • the hold-down force acts on the drawing flanges the sheet metal blanks 22.23 regardless of the Closing force of the housing 2 and is less than this.
  • the pressure builds up in the forming area the sheet metal blanks 22, 23 after the overcoming the yield point begins the forming process and as long as the sheet metal blanks 22, 23 still have none Have contact with the drawing dies 24a, 26a there is even stress distribution in the sheet on.
  • the material flow may also be separated adjustable between both sheet metal cuts, in which he controlled via hold-down forces can be, on the other hand pull beads and / or Barrier edges, possibly also locally, may be provided can, depending on the geometry of the sheet metal part are trainable.
  • the gap is filled in a controlled manner 34 being initially - with the pressure build-up in Inside of the tool - also a separate filling of the gap 34 possible in the initial stage is. Since, as I said, the hold-down force of the Tool 21 is always less than the sealing force of the housing 2, can also be used to a small extent Working medium over the contact surfaces of the sheet metal blanks 22,23 get into the space 34, what by the lubricating effect of the hydraulic fluid the flow of the material of the sheet metal blanks favored.
  • the hold-down force is in the end area of the pressure build-up of the tool 21 no longer via the plunger 31 of the press device acting on it causes: With the increased pressure build-up and if the sheet metal blanks on the die formations 24, 26, the tool parts 24, 26 due to the high internal pressure against the housing parts 3, 4 pressed so that the final or calibration pressure the maximum locking force of the device corresponds to which of the housing 1 on the in shown execution area on the spacer plate 29 is transferred to the tool 21.
  • the tool parts 24, 26, albeit minimally, apart from each other, so that they in the sheet metal blanks 22, 23 not in their edge regions hold on more. But at this point, it is Post-flow process completed.
  • another Extension level of the device can be adjusted by appropriate Dimensioning of housing, spacer plates and Tool parts or by a vertical length compensation the lifting of the tool parts is reduced if the forming process requires it.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP99123764A 1998-12-03 1999-11-30 Verfahren und Vorrichtung zum hydraulischen Umformen von Werkstücken Expired - Lifetime EP1005930B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19855753A DE19855753A1 (de) 1998-12-03 1998-12-03 Verfahren und Vorrichtung zum hydraulischen Umformen von Werkstücken
DE19855753 1998-12-03

Publications (2)

Publication Number Publication Date
EP1005930A1 EP1005930A1 (de) 2000-06-07
EP1005930B1 true EP1005930B1 (de) 2003-10-01

Family

ID=7889822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123764A Expired - Lifetime EP1005930B1 (de) 1998-12-03 1999-11-30 Verfahren und Vorrichtung zum hydraulischen Umformen von Werkstücken

Country Status (7)

Country Link
US (1) US6354124B1 (da)
EP (1) EP1005930B1 (da)
AT (1) ATE250993T1 (da)
DE (2) DE19855753A1 (da)
DK (1) DK1005930T3 (da)
ES (1) ES2207105T3 (da)
PT (1) PT1005930E (da)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7744122B2 (en) * 1995-12-12 2010-06-29 Automotive Technologies International, Inc. Driver side aspirated airbags
DE10028804A1 (de) * 2000-06-15 2001-12-20 Schuler Smg Gmbh & Co Kg Verfahren zum hydromechanischen Umformen von Blechen und Vorrichtung zur Durchführung des Verfahrens
DE10152114A1 (de) * 2001-10-23 2003-04-30 Dorst Masch & Anlagen Pressenanordnung, insbesondere zum Pressen von keramischen Presslingen
US6694790B2 (en) * 2002-04-17 2004-02-24 General Motors Corporation Mid plate process and equipment for the superplastic forming of parts from plural sheets
RU2467819C1 (ru) * 2011-03-30 2012-11-27 Открытое акционерное общество "Завод Старт" Гидроштамп для изготовления фланжированных днищ
CN105149410B (zh) * 2015-09-10 2018-03-27 鼎艺科技股份有限公司 金属板材的高压成型系统
CN109570379B (zh) * 2018-12-27 2024-05-14 广东永强奥林宝国际消防汽车有限公司 一种罐体封头冲压模具及罐体封头的冲压工艺
CN110238260A (zh) * 2019-05-17 2019-09-17 长沙理工大学 一种金属薄板多级筒体拉深成型装置及工艺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728317A (en) * 1951-10-23 1955-12-27 Walton S Clevenger Apparatus for hydraulic die forming
DE1279616B (de) * 1963-03-07 1968-10-10 Siemens Elektrogeraete Gmbh Vorrichtung zum hydraulischen Tiefziehen
JPS59232629A (ja) * 1983-06-17 1984-12-27 Toyota Motor Corp 液圧成形方法およびその装置
JPH03230822A (ja) * 1990-02-02 1991-10-14 Mitsubishi Heavy Ind Ltd 超塑性成形方法
JPH0515931A (ja) * 1991-02-19 1993-01-26 Honda Motor Co Ltd 金属成形体の成形方法及びその金属成形体
JPH0550153A (ja) * 1991-08-26 1993-03-02 Honda Motor Co Ltd 金属板の成形装置
US5277045A (en) * 1992-05-08 1994-01-11 Rockwell International Corp. Superplastic forming of metals at temperatures greater than 1000 degree C
DE4417460B4 (de) * 1994-05-19 2006-08-24 Kleiner, Matthias, Priv.-Doz. Dr.-Ing. Verfahren und Vorrichtung zur Herstellung von Blechformteilen durch Streck- oder Tiefziehen aus Platinen
DE4434799A1 (de) * 1994-09-29 1996-04-04 Smg Sueddeutsche Maschinenbau Verfahren und Vorrichtung zum Umformen von Metallblech
US6052887A (en) * 1996-09-16 2000-04-25 Tower Automotive Apparatus and method for joining sheet metal layers
DE19732413B4 (de) * 1997-07-28 2005-03-24 Forschungsgesellschaft Umformtechnik Mbh Verfahren und Vorrichtung zum kombinierten Hydro-Umformen von Metallblech

Also Published As

Publication number Publication date
PT1005930E (pt) 2004-02-27
DE59907183D1 (de) 2003-11-06
US6354124B1 (en) 2002-03-12
DK1005930T3 (da) 2004-02-09
EP1005930A1 (de) 2000-06-07
ATE250993T1 (de) 2003-10-15
ES2207105T3 (es) 2004-05-16
DE19855753A1 (de) 2000-06-08

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