EP0595813B1 - Gesenkformen von metallblechmaterialien - Google Patents

Gesenkformen von metallblechmaterialien Download PDF

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Publication number
EP0595813B1
EP0595813B1 EP92905251A EP92905251A EP0595813B1 EP 0595813 B1 EP0595813 B1 EP 0595813B1 EP 92905251 A EP92905251 A EP 92905251A EP 92905251 A EP92905251 A EP 92905251A EP 0595813 B1 EP0595813 B1 EP 0595813B1
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EP
European Patent Office
Prior art keywords
cavity
die
sheet
medium
sheet metal
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
EP92905251A
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English (en)
French (fr)
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EP0595813A1 (de
EP0595813A4 (en
Inventor
Michael L. Rhoades
Lawrence J. Rhoades
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Extrude Hone LLC
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Extrude Hone LLC
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Publication date
Priority claimed from US07/734,764 external-priority patent/US5085068A/en
Application filed by Extrude Hone LLC filed Critical Extrude Hone LLC
Publication of EP0595813A1 publication Critical patent/EP0595813A1/de
Publication of EP0595813A4 publication Critical patent/EP0595813A4/en
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Publication of EP0595813B1 publication Critical patent/EP0595813B1/de
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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
    • 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
    • B21D26/031—Mould construction

Definitions

  • This invention relates to a method and apparatus for die forming sheet materials and particularly sheet metals such as aluminum, titanium, and steel by utilizing a flowable, viscous thermoplastic polymer medium to force the sheet material into a die cavity to generally assume the shape of the cavity surface.
  • This invention finds particular utility in the die forming of sheet metals into complex forms and the die forming of hard-to-work sheet metals.
  • Conventional die forming is similar to embossing except that the overall shape and configuration of the workpiece is usually significantly altered.
  • the sheet material is pressed between two mating dies which stretch the workpiece into the configuration between the two dies, which may resemble bowl or saucer-like configurations, and is a common technique for forming automobile body parts such as side panels and fenders.
  • Deep drawing is a process capable of producing rather severe degrees of deformation, whereby products such as two-piece beer and soda cans, washing machine tubs, and the like are formed cold from flat sheet steel or aluminum blanks.
  • the sheet metal blank is clamped down tight over a die, which merely consists of a hole through a heavy steel plate with rounded corners at the upper surface of the hole.
  • the punch typically having a flat bottom with rounded edges at the periphery, is driven down through the die, pushing and stretching the sheet metal through the narrow clearance between the sides of the punch and die.
  • the finished product will have a configuration substantially as defined by the punch.
  • the metal undergoes rather severe deformation during a deep drawing operation. Little or no stretching occurs directly under the flat bottom face of the punch, while the metal is always thinned significantly where it contacts the rounded lower corners of the die. Because a progressively bigger circumferential surface of the sheet metal is progressively being drawn between the punch and die as the metal is drawn, the side walls of the drawn product may tend to wrinkle or develop an eared shell. In addition to the fact that the sheet metal blank is clamped tightly over the die, wrinkling and earing can be minimized, if not avoided, by proper design of the punch and die and use of metals having the proper drawing properties. In this event, the wall thickness near the top of the drawn product is usually thicker than was the starting sheet metal blank.
  • variable wall thickness can be avoided in a modified process known as "draw and iron."
  • draw and iron the only significant difference from deep drawing is the fact that the clearance between the sides of the punch and die is narrower than the thickness of the sheet metal.
  • the sides of the product are “ironed” between the two surfaces to a uniform thickness as it is pulled through the narrow clearance.
  • the punch must of course be capable of being withdrawn from the drawn product; and accordingly, the diameter of the draw cup cannot be greater at the bottom than it is at top.
  • undercut impressions cannot be made and bottom surfaces other that flat surfaces are difficult to achieve except by way of incorporating additional deforming steps on the drawn product.
  • the addition of more processing steps merely adds to the equipment cost and time to finish the end product.
  • U.S.-A- 1,625,914 teaches die forming thin metal foils by applying air pressure to deform the sheet into conformity with a female die.
  • Hamilton, et al, U.S.-A- 3,934,441 is directed to superplastic die forming of titanium at temperatures in the range of 1450 to 1850° F; the reference employs a pressure differential which may be produced by a vacuum between the titanium sheet and the die and may be supplemented by an inert gas on the opposite face of the sheet.
  • JP-A-61-140328 discloses superplastic die forming employing granular particles of graphite, metal, or ceramic powder as a pressure transmitting medium.
  • This invention is predicated upon the development of a new and unique process for drawing or die forming sheet metals and materials, including hard-to-work sheet metals, into unusual and complex shapes which are not normally possible to produce with conventional die forming techniques.
  • the present invention provides a method of die forming metallic sheet materials as set forth in claim 1.
  • the sheet workpiece is drawn into a die which does not use a solid punch, but rather utilizes a flowing viscous thermoplastic polymer media with varying flow patterns to programmably stretch the sheet workpiece into a die utilizing differential pressures, differential flow rates, and/or differential flow sequences designed to effect optimum stretching the workpiece without fracture.
  • the operation can accordingly be utilized to greatly reduce the frictional forces on the sheet metal and optimize the surface area available for stretching and, thus, permit a greater degree of deformation and deformation control, even permitting the working of hard-to-work alloys and composites which were never before susceptible to any significant stretching operation.
  • the object of this invention is to provide a process for drawing sheet material blanks into a die cavity utilizing a flowing viscous thermoplastic polymer medium which not only reduces frictional forces acting on the sheet workpiece, but also provides the ability to control and regulate the deformation sequence of the workpiece, permitting the stretch forming of hard-to-work materials and more severe working of the more conventional sheet materials.
  • the process of this invention also permits the easy formation of more complex configurations such as reverse profiles, undercuts, reentrant corners, and more complex surface detail.
  • the process of this invention greatly reduces the tendency to tear the workpiece, and effects a more uniform stretching throughout the sheet workpiece blank. As a result, more severe deformations can be effected in a single draw including unusual shapes and undercuts, which cannot be effected by a single draw by the prior art techniques.
  • the process of this invention utilizes the force of a thermoplastic polymer medium under considerable pressure as the forming force, the process of this invention further makes it possible to subject the workpiece to high hydrostatic pressures during the deforming operation, permitting the operation to take advantage of the exceptional plasticity of the workpiece material while subjected to such high hydrostatic pressures, and attain a degree of deformation not possible at atmospheric pressure environments.
  • Figure 1 is a schematic side view of the apparatus which may be used to perform one embodiment of this invention with the die portion shown in section to illustrate the interior prior to a draw.
  • Figure 2 is a cross-section of the arrangement shown in Figure 1 taken at line II-II.
  • Figure 3 is identical to Figure 1 except that it illustrates the interior of the die section shortly after the drawing operation has been commenced.
  • Figure 4 is identical to Figure 3 except that it illustrates the interior of the die section as the drawing operation has progressed even further.
  • Figure 5 is identical to Figure 4 except that it illustrates the interior of the die section just before the drawing operation is completed.
  • a preferred apparatus for performing the inventive method consists of a die ( 10 ) having an irregular cavity (12).
  • Three narrow passageways (14a), (14b), and (14c) are provided through the bottom of die (10) extending from the bottom surface of cavity (12) through the body of die (10).
  • Withdrawal cylinders (16a), (16b), and (16c) are connected to the underside of die (10) such that the interior of cylinder (16a) communicates with passageways (14a), (14b), and (14c) such that passageways (14a), (14b), and (14c) communicate with cylinders (16a), (16b), and (16c) respectively.
  • Each cylinder (16a), (16b), and (16c) is a thermoplastic polymer extruding, positive displacement, expansible chamber. While the configuration of cavity (12) is not intended to depict any particular product, it illustrates a variety of surface configurations as are capable of being formed in a single operation and could be representative, for example, of an engine oil pan.
  • a hold-down member (20) is adapted to be clamped tight over the top of die (10) by a means (not shown) such as a clamp or a hydraulic press tightly securing the parts together. While it is generally not preferred, the hold down member (20) may also engage and clamp the edges of a sheet metal blank (22). It is preferred to leave the edges of sheet metal blank (22) unsecured to avoid the stress concentrations which result during the drawing operation.
  • Hold-down member (20) consists of a heavy metal body having a shallow cavity (24) in the underside surface which covers the same area as the upper end of cavity (12) in die (10), and accordingly mates therewith.
  • An injection cylinder (26) being another thermoplastic polymer extruding, positive displacement, expansible chamber, is secured to the top of hold-down member (20) such that the interior communicates with cavity (24) via passageway (28). Means (not shown) must be provided to activate all the cylinders individually and selectively by mechanical or hydraulic operation.
  • Passageway (28) may be of any size sufficient to pass the viscous thermoplastic polymer medium as desired without unacceptable energy loss.
  • Passageways (14a), (14b), and (14c) should be large enough to allow the viscous thermoplastic polymer medium to flow at a rate corresponding to the programmed retraction of receiving cylinders (16a), (16b), and (16c), but should be small enough to permit the die bottom surface of cavity (12) to support the formed sheet without any significant stretching of the sheet into the passageways.
  • thermoplastic polymer medium (30) is placed within cavity (12), filling the cavity to its upper surface.
  • a like thermoplastic polymer medium (32) is provided within cylinder (26), cavity (24), and passageway (28).
  • a sheet metal blank (22) is then placed over die (10) and thereafter, hold-down member (20) is clamped down onto die (10) by means (not shown), securely holding the mating surfaces in place.
  • cylinders (26) and (16a) are activated in unison so that cylinder (26) will inject thermoplastic polymer medium (32) into cavity (24) while cylinder 16a withdraws thermoplastic polymer medium (30) from cavity (12) at the same rate.
  • cylinders (16b) and (16c) are not activated so that the forces acting to stretch sheet metal blank into cavity (12) are not uniform across the top of cavity (12). That is to say, since the only active cylinder withdrawing thermoplastic polymer medium (30) from cavity (12) is on the right side of the cavity, (as viewed in the drawings) the forces acting to stretch the sheet metal blank (22) into cavity (12) are naturally acting on the right side of cavity (12).
  • the active cylinders are graphically illustrated in Figure 3 by the arrows in cylinders (16a) and (26), while zeros are shown in cylinders (16b) and (16c), indicating that they are not yet active at this point in the operation.
  • thermoplastic polymer medium of sufficient viscosity will not act in a distinctly non-Newtonian fluid.
  • the ingress or egress of the thermoplastic polymer medium into or out of a cavity as described above will not cause an increase or decrease in medium pressure uniformly throughout the chamber. Rather, the ingress or egress of the thermoplastic polymer medium from a localized point or area will cause motion of the thermoplastic polymer medium in that localized area and thus, will effect a greater change in pressure differential acting on the workpiece in the vicinity of the point of ingress or egress.
  • cylinder (16b) is activated, and will start withdrawing thermoplastic polymer medium (30) from the center portion of the cavity (12), and accordingly start stretching the sheet metal blank (22) towards the center portion of cavity (12) while the right side continues to draw and stretch.
  • cylinders (16a) and (16b) must be withdrawing thermoplastic polymer medium (30) from the cavity (12) at a combined rate equal to the rate at which cylinder (26) is extruding thermoplastic polymer medium (32) into cavity (24). This change in operation will stretch and draw the sheet metal blank (22) across the bottom of cavity (12), increasingly toward the center of the cavity.
  • thermoplastic polymer medium (32) will exert pressure in all directions and will accordingly stretch the sheet metal into undercut portions of cavity (12), as shown at the undercut location (34). If such an undercut portion is provided in the die cavity, the die will have to be made with a separable piece; e.g., piece (10a) so that such a piece can be removed to permit removal of the drawn product after it is formed.
  • thermoplastic polymer medium (30) from the left side of the cavity and accordingly, stretching the sheet metal blank (22) towards the left.
  • cylinders (16b) and (16c) must withdraw thermoplastic polymer medium (30) at the same rate at which cylinder (26) is extruding thermoplastic polymer medium (32) into cavity (24).
  • a similar result can be effected by simultaneously withdrawing the medium through all of the outlet ports, but at varying withdrawal rates.
  • the above sequence of workpiece deformation can be effected by simultaneously withdrawing medium (30) through all three outlet passageways (14a), (14b) and (14c), but at first utilizing a greater withdrawal rate through passageway (14a) and subsequently increasing the withdrawal rate through passageway (14b), and so on.
  • thermoplastic polymer medium there is no particularly critical limitation in the selection of suitable materials, provided the medium is one that has a high viscosity, sufficient to provide a significant pressure differential between the areas adjacent to the passageways (16) and elsewhere in the cavity. If the medium is too fluid there will be little control of the pressure differential within the mold cavity, with little or no ability to control the stretching of the workpiece.
  • a medium that exhibits an apparent increase in viscosity under shear has some advantage because it provides a more desirable flow distribution.
  • Polysiloxanes particularly borosiloxane polymers, are generally preferred, in that they show apparent increasing viscosity with applied shear, do not adhere to most metals, are readily cleaned from the formed surfaces, and have readily controllable viscosities which may be adjusted with the addition of plasticising amounts of polysilanes (silicone oils) or stiffening amounts of fillers, such as silica, diatomaceous earth, zeolites, and the like. Viscosity is also responsive to temperature, of course.
  • thermoplastic polymers may be employed, such as low molecular weight addition polymers, including, for example, polyolefins, i.e., polyethylene, polypropylene, polybutene, and the like, polyethers, such as polyethylene oxides, thermoplastic elastomers, including ethylene-propylene copolymers, thermoplastic polyurethanes, and the like.
  • polyolefins i.e., polyethylene, polypropylene, polybutene, and the like
  • polyethers such as polyethylene oxides
  • thermoplastic elastomers including ethylene-propylene copolymers
  • thermoplastic polyurethanes thermoplastic polyurethanes
  • the sequence of activating the cylinders (16a), (16b), and (16c) can be varied as desired to effect the sheet metal stretching where desired, and thus avoid over drawing and tearing.
  • the sheet metal blank must be stretched to a greater degree on the right side of the cavity as illustrated. Accordingly, more uniform stretching can be effected by starting the thermoplastic polymer withdrawal at the right side of the cavity (12) so that a greater span of sheet metal is available for stretching while producing this greater depth.
  • the actual number of outlet passageways necessary from the die cavity may vary considerably depending upon the nature of the cavity itself and the degree of control desired in withdrawing the viscous thermoplastic polymer medium. If the bottom of the die cavity consists of a large horizontal flat surface, it may be necessary to provide a rather large number of outlet passageways to assure that no thermoplastic polymer medium becomes entrapped between the die surface and the sheet metal to effect a distorted drawn configuration. It should be noted that the embodiment shown in Figures 1-5 utilizes only three outlet passageways (14), primarily because the bottom is narrow, as shown in Figure 2, and has considerable sloping which facilitates withdrawal of the thermoplastic polymer medium without any significant possibility of entrapping the medium within the cavity.
  • inlet cylinder (26) and passageway (28) While only one inlet cylinder (26) and passageway (28) is shown in the embodiment of Figures 1-5, it should be obvious that a plurality of inlet passageways (28) with associated cylinders (26) can be provided where necessary or desirable to better control the stretching of the sheet metal workpiece and where the design of the mold cavity warrants it. For some applications it may be desirable to provide a plurality of injection passageways with only one withdrawal passageway, or possibly even utilizing no withdrawal of medium whereby only the injected medium deforms the sheet metal. By selectively programming either one or both the inlet medium and outlet medium through the various passageways simultaneously at differential rates among the injecting and withdrawing cylinders, the sheet metal workpiece can be controllably stretched into the mold cavity in practically any sequence desired. This will provide a great degree of flexibility of results to provide a uniform or controlled nonuniform wall thickness.
  • thermoplastic polymer medium (30) sequentially from cavity (12), provided that a uniform stretching of the sheet metal can be effected without such a sequential withdrawal.
  • Placement of the cylinders with respect to die (10) and hold-down member (20), or connected parts, may also be varied provided they do not interfere with the cavities.
  • the above-discussed advantages of the inventive process will permit the deformation of the metal to a greater extent than prior art processes because the entire sheet surface area over the die cavity is subject to stretching.
  • the pressures of the two media can be elevated to the point where the workpiece is subjected to a considerable hydrostatic surface pressure sufficient to render the material susceptible to exceptional plasticity, as discussed above. In such circumstances, even the hard-to-work metals can be subjected to exceptional degrees of deformation without risk of tearing or fracture of the workpiece.
  • thermoplastic polymer medium acting on both surfaces of the sheet metal.
  • the upper media (32) can be dispensed with, allowing the atmospheric air pressure to stretch the sheet metal into cavity (12) as the thermoplastic polymer medium (30) is programmably withdrawn from cavity (12).

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Claims (7)

  1. Verfahren zum Gesenkformen Von Metallblechmaterialien, welches die folgenden Stufen umfaßt:
    A. das Vorsehen einer Matrize (10), die mit einem Hohlraum (12) und mindestens einer Ausgangsöffnung (14a, 14b, 14c) ausgestattet ist, während dieser Hohlraum (12) mit einem Mittel (30) gefüllt ist;
    B. das Vorsehen von Hilfsmitteln (16a, 16b, 16c) für das Abziehen des Mittels (30) aus dem Hohlraum (12) durch die Ausgangsöffnungen (14a, 14b, 14c);
    C. das Vorsehen von Hilfsmitteln (24) zum Befestigen eines metallischen Bleches (22), welches mit der Matrize (10) im Eingriff steht und den Hohlraum (12) einschließt;
    D. die regelbare Entnahme des Mittels (30) aus dem Hohlraum (12), wobei ein Druck auf der dem Hohlraum (12) gegenüberliegenden Fläche auf das Blech (22) aufgebracht wird, bis das Blech (22) sich der Form der Matrize (10) angepaßt hat, dadurch gekennzeichnet, daß das Mittel (30) ein viskoses thermoplastisches Polymer aufweist.
  2. Verfahren nach Anspruch 1, worin die Matrize (10) mit mehreren Ausgangsöffnungen (14a, 14b, 14c) ausgestattet ist und das Polymer (30) selektiv aus jeder der Ausgangsöffnungen abgezogen wird, um den Ausfluß aus dem Hohlraum (12) zu kontrollieren und die Formgebung des Bleches (22) zu regulieren.
  3. Verfahren nach Anspruch 1, worin der Hohlraum (12) einspringend ist.
  4. Verfahren nach Anspruch 1, worin die Entnahme des Polymers (30) und das Aufbringen von Druck auf das Blech (22) auf der dem Hohlraum (12) gegenüberliegenden Fläche so geregelt werden, daß das Blech (22) unter einem hohen hydrostatischen Druck gehalten wird.
  5. Verfahren nach Anspruch 4, worin die Matrize (10) mit mehreren Ausgangsöffnungen (14a, 14b, 14c) ausgestattet ist und das Polymer (30) selektiv aus einer jeden der Ausgangsöffnungen abgezogen wird, um den Ausfluß aus dem Hohlraum (12) zu kontrollieren und die Formgebung des Bleches (22) zu regulieren.
  6. Verfahren nach Anspruch 1, worin durch den Umgebungsdruck, auf der dem Hohlraum (12) gegenüberliegenden Fläche, ein Druck auf das Blech (22) ausgeübt wird.
  7. Verfahren nach Anspruch 1, worin, über Hilfsmitteln (26) für das Aufbringen unter Druck eines viskosen thermoplastischen Polymers, ein Druck auf das Blech ausgeübt wird.
EP92905251A 1991-07-23 1991-10-30 Gesenkformen von metallblechmaterialien Expired - Lifetime EP0595813B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US734764 1991-07-23
US07/734,764 US5085068A (en) 1991-01-16 1991-07-23 Die forming metallic sheet materials
PCT/US1991/007966 WO1993001902A1 (en) 1991-07-23 1991-10-30 Die forming metallic sheet materials

Publications (3)

Publication Number Publication Date
EP0595813A1 EP0595813A1 (de) 1994-05-11
EP0595813A4 EP0595813A4 (en) 1994-09-07
EP0595813B1 true EP0595813B1 (de) 1996-09-11

Family

ID=24952989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92905251A Expired - Lifetime EP0595813B1 (de) 1991-07-23 1991-10-30 Gesenkformen von metallblechmaterialien

Country Status (7)

Country Link
EP (1) EP0595813B1 (de)
JP (1) JP3187834B2 (de)
AT (1) ATE142545T1 (de)
DE (1) DE69122130T2 (de)
ES (1) ES2094345T3 (de)
RU (1) RU2096117C1 (de)
WO (1) WO1993001902A1 (de)

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Publication number Priority date Publication date Assignee Title
DE19513444C2 (de) * 1995-04-13 1999-12-23 Konrad Schnupp Vorrichtung zum hydromechanischen Umformen
JP2003339873A (ja) * 2002-05-23 2003-12-02 Enomoto Co Ltd カテーテル用カシメキャップおよびその製造方法
US7905128B2 (en) * 2008-07-24 2011-03-15 The Boeing Company Forming method and apparatus and an associated preform having a hydrostatic pressing medium
DE102013103432A1 (de) * 2013-04-05 2014-10-09 Hochschule Hannover Vorrichtung und Verfahren zur Formgebung eines Werkstückes
CN104588440B (zh) * 2014-12-31 2016-06-22 哈尔滨工业大学 粘性介质压力成形中非均匀压力场测试装置及其测试方法
CN104515735B (zh) * 2014-12-31 2017-02-22 哈尔滨工业大学 用于粘性介质压力成形的粘性附着力测试装置及其测试方法
RU2635990C2 (ru) * 2015-12-08 2017-11-17 Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр имени М.В. Хруничева" (ФГУП "ГКНПЦ им. М.В. Хруничева") Способ штамповки детали полусферической формы из труднодеформируемого титанового сплава вт6-с в одном штампе
KR101621239B1 (ko) * 2016-02-02 2016-05-16 박광춘 비정형 건축물용 복합곡면 패널 성형장치 및 그 성형방법
DE102016114423A1 (de) * 2016-08-04 2018-02-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur Druckumformung von Hohlprofilen
CN112935059B (zh) * 2021-02-10 2022-03-29 哈尔滨工业大学 一种钛合金u形件粘性介质室温成形方法

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US3529458A (en) * 1967-12-15 1970-09-22 Pressed Steel Fisher Ltd Method of forming sheet or plate material
US3934441A (en) * 1974-07-08 1976-01-27 Rockwell International Corporation Controlled environment superplastic forming of metals
JPS5656737A (en) * 1979-10-13 1981-05-18 Inoue Japax Res Inc Die device
US4502309A (en) * 1980-05-19 1985-03-05 Rockwell International Corporation Method of removing formed parts from a die
JPS61140328A (ja) * 1984-12-12 1986-06-27 Agency Of Ind Science & Technol 粉粒体を圧力媒体とした超塑性材の成形方法
SU1268247A1 (ru) * 1985-08-22 1986-11-07 Предприятие П/Я М-5671 Способ изготовлени листовых деталей с пр молинейными рифтами

Also Published As

Publication number Publication date
WO1993001902A1 (en) 1993-02-04
DE69122130D1 (de) 1996-10-17
DE69122130T2 (de) 1997-02-20
ATE142545T1 (de) 1996-09-15
JP3187834B2 (ja) 2001-07-16
JPH06510236A (ja) 1994-11-17
EP0595813A1 (de) 1994-05-11
RU2096117C1 (ru) 1997-11-20
ES2094345T3 (es) 1997-01-16
EP0595813A4 (en) 1994-09-07

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