EP3415247A1 - Procédé et dispositif de façonnage - Google Patents

Procédé et dispositif de façonnage Download PDF

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Publication number
EP3415247A1
EP3415247A1 EP17175477.3A EP17175477A EP3415247A1 EP 3415247 A1 EP3415247 A1 EP 3415247A1 EP 17175477 A EP17175477 A EP 17175477A EP 3415247 A1 EP3415247 A1 EP 3415247A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
active medium
tool
forming
cavity
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.)
Withdrawn
Application number
EP17175477.3A
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German (de)
English (en)
Inventor
Roland Hennig
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.)
Aleris Aluminum Duffell BVBA
Original Assignee
Aleris Aluminum Duffell BVBA
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 Aleris Aluminum Duffell BVBA filed Critical Aleris Aluminum Duffell BVBA
Priority to EP17175477.3A priority Critical patent/EP3415247A1/fr
Publication of EP3415247A1 publication Critical patent/EP3415247A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • B21D22/20—Deep-drawing
    • B21D22/205—Hydro-mechanical deep-drawing
    • 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

Definitions

  • the invention relates to a method and a device for forming sheet metal, in particular for the hydromechanical deep drawing of a workpiece, in particular a sheet metal or foil board made of aluminum alloy.
  • the invention is therefore based on the object, a method for forming a workpiece, in particular a board, specify, which allows a particularly fast, cost-effective and thus considerably more efficient hydromechanical deformation than before.
  • the invention is further based on the object to provide a corresponding device for carrying out a faster, cost-effective and efficient forming.
  • a method for forming a workpiece in a method for forming a workpiece, the following method steps are performed: clamping the workpiece between a first tool and a second tool, preforming the workpiece in a first direction by applying pressure an active medium, and forming the workpiece between a forming die and the active medium, in particular in a second direction opposite to the first direction, wherein the active medium is pressed during forming by the movement of the forming die in a pressure accumulator.
  • the invention is also directed to a device for forming, in particular deep drawing, a workpiece, wherein the device is particularly suitable for carrying out the method according to the invention. Therefore, all embodiments mentioned in connection with the method are also applicable to the device and vice versa
  • the invention has the advantage that the active medium is passed passively during the forming of the work of the machine in a pressure accumulator, from which it is almost without pressure in some embodiments for the preforming of another workpiece during the return stroke of the machine traceable into the cavity.
  • the invention can dispense with hydraulic units in particular, which makes the method faster and less expensive.
  • neither the method nor the device according to the invention uses additional pumps or hydraulic units.
  • Another advantage is that a particularly homogeneous and very rapid preforming can take place.
  • the method according to the invention can be applied, in particular, to aluminum alloy workpieces or other materials that are less suitable than steel.
  • the invention is advantageous if the workpiece is a sheet metal or foil board of an aluminum alloy, in particular of an AA3xxx, AA5xxx or AA6xxx alloy.
  • the formed workpiece is advantageously used in the automotive or aircraft industry, it is particularly advantageous to a body component.
  • the deep-drawn workpiece advantageously has a thickness of 0.5 to 4 mm, in particular 1 to 2 mm.
  • the workpiece is homogeneously deformed or pre-stretched during the preforming, in particular at each point of the workpiece with a pre-strain of 2-10%, preferably 2-5%, particularly preferably 3-4%.
  • a pre-strain of 2-10%, preferably 2-5%, particularly preferably 3-4% is also possible to shape sinkers of poorly deformable materials, in particular aluminum alloy.
  • one of the two tools has a clamping element, also called a downholder, and a shaping forming punch.
  • the clamping element leads the shaping forming punch about an amount to be defined according to the desired pre-stretching and the formability of the workpiece. Particularly advantageously, it prefers this by up to 20%, preferably 10-20%, of the largest diameter of the workpiece or of the forming die. So if, for example, a workpiece with a diameter of 1000mm is to be deep-drawn, a lead and associated pre-stretching of 100 to 200mm is advantageous.
  • the pressure of the liquid or gaseous active medium during the preforming and / or during the forming of the workpiece by means of a controllable or controllable flow device, in particular a controllable valve controlled.
  • a controllable valve controlled it is provided to control the pressure of the active medium during the preforming by controlled discharge from the pressure accumulator.
  • a pressure-controlled valve between the cavity and the accumulator can be provided.
  • the controllable flow device can in particular be pressure-controlled or pressure-controlled.
  • a predetermined pressure profile in the cavity can be realized by the flow-through device during the preforming and / or during the forming (for example, a constant pressure or a predetermined pressure curve during the preforming or forming).
  • the active medium is a liquid, in particular an oil or an oil / water emulsion.
  • the active medium is gaseous, in particular compressed air, nitrogen or oxygen.
  • any form-adaptive medium is suitable as the active medium, for example also sand or steel balls.
  • it is advantageous to guide the active medium during the forming into an accumulator, from which it can be returned to the cavity for preforming a further workpiece.
  • hydro-mechanical forming is that even thicker aluminum sheets (for example, 1.2 and 1.5 mm) may possibly be formed without the otherwise necessary tool changes (in particular drawing gap).
  • the system accumulator, connecting lines and possibly cavity forms a closed system, which only needs to be filled for initial filling, revisions and possibly to compensate for leaks with the active medium. During normal operation of the device, no hydraulic power unit is required.
  • the liquid active medium is sealed in the cavity with a membrane in order to avoid leaks and also to allow a faster return of the active medium during the return stroke of the machine.
  • the membrane is made of a material that can be readily shaped.
  • the tool with the cavity is the second tool, which may be a lower tool in particular.
  • the first tool may in particular comprise a sheet metal retainer and a punch and is preferably an upper tool.
  • a reverse arrangement e.g. when working with gas as the active medium, possible.
  • the tool in which the cavity is formed a plurality of pistons, which are adjustable for preforming of the workpiece so that the volume of the cavity can be reduced or increased.
  • a displacement volume is created in a simple manner, with which, in particular during preforming, the cavity can be reduced and thus the active medium can be pressurized.
  • the pressure in the cavity can be selectively controlled or regulated, either by a controllable flow device (as described above) or by targeted control of the movement of the piston.
  • a controllable flow device as described above
  • 5 to 30 pistons may be provided.
  • Such a cylinder cushion is easier to seal than other embodiments.
  • existing thermoforming devices can be converted more easily by only a cylinder cushion is installed in the tool in which the cavity is formed.
  • the tool in which the cavity is formed, at least two mutually movable parts, which are adjusted for preforming (bulging) of the workpiece relative to each other.
  • a second tool of the device in particular a lower tool, is at least in two parts and, for example, has a movable outer ring and a fixed inner part.
  • the liquid active medium during the forming of the workpiece via a controllable flow device, in particular a controllable pressure valve, pressed into the pressure accumulator.
  • a controllable flow device in particular a controllable pressure valve
  • the forming die is moved relative to the curved workpiece (pressed into the previously formed “pillow"), whereby the workpiece is gradually “waling" the forming die.
  • the thereby displaced active medium is, preferably under passively controlled pressure, pressed into one or more pressure accumulator.
  • the accumulator (s) can be located directly on or in the tool. From the pressure accumulator, the active medium can flow back into the cavity (water tank) in a controlled manner with a subsequent return movement or a start-up of the first tool (hold-down device).
  • the pre-forming of the workpiece in the direction of the forming die can be accomplished particularly simply by moving a clamping element (hold-down) of the first tool (upper tool part) together with an outer part of the second tool (lower tool part) to preform the workpiece.
  • the clamping element which clamps the edge of the workpiece by clamping, is moved downwards relative to a stationary inner part of the second tool and thereby moves along the outer, annular part of the second tool.
  • the inner part of the second tool in this case includes in particular the bottom or a bottom region of the cavity, while the outer part of the second tool comprises a relative to the fixed bottom region movable edge region.
  • the preforming of the workpiece in the direction of the first tool part or the forming die is brought about by the movement of the clamping element (blank holder) of the first tool part.
  • the clamping element (hold-down) of the first tool is thereby pressed with the pressure required for the preforming against the outer element of the second workpiece. This allows the preforming particularly simple and in particular without the use of a hydraulic unit cause.
  • the liquid active medium is returned after completion of the forming of the pressure accumulator into the cavity, in particular during a return adjustment of the parts of the second tool relative to each other. In this way, the active medium is available again for a subsequent preforming process.
  • the method (with liquid or gaseous active medium) can be adapted for deep drawing of different shapes, that only the forming die and the clamping element of the first tool are exchanged, while the second tool, in which the cavity is formed, for deep drawing different geometrically more similar Forms of a component family can be used.
  • the inventive method is therefore very versatil.
  • a gaseous substance (gaseous active medium) is used as the active medium.
  • a gaseous active medium a reverse installation of the tools (punch and plate holder on the bottom of the die cushion and closed die on top) is also possible.
  • the gas for example, nitrogen or oxygen is considered.
  • the gas for example, nitrogen or oxygen is considered.
  • the gaseous active medium is introduced to preform the workpiece only passively from the slightly preloaded pressure accumulator with 30 - 50 bar in the space between the second tool and workpiece (cavity).
  • the cavity in the second tool need not be variable in volume. It can also be very small or absent, or the cavity is only defined by the space or gap between the workpiece and the second tool (ie the die) (which is rather or less small during the pre-forming and forming process). Therefore, this embodiment is particularly easy to convert.
  • Pressure intensifier can be used (for example, to increase compressed air with 10 bar to about 20-30 bar).
  • the gaseous active medium is preferably introduced during the preforming of the workpiece from the pressure accumulator into the cavity.
  • the gaseous active medium is introduced into the cavity immediately after the tools are closed during the preforming of the workpiece at high speed from a prestressed pressure accumulator which is defined according to the required homogeneous pre-stretching of the workpiece. For preforming therefore no additional pneumatic tool is required.
  • the required pressure for preforming the workpiece is provided by the active medium stored in the pressure accumulator.
  • the pressure medium is pressed under pressure into the pressure accumulator during the deformation, in some embodiments by a controllable flow-through device.
  • a sufficiently high pressure is built up in the cavity, so that no pneumatic tool is required, at most one pressure booster for pressure increase.
  • a conventional tool such as is currently used for steel blanks
  • the pressure accumulator can be converted to aluminum blanks, in particular by installing the pressure accumulator.
  • the pneumatic and homogeneous preforming operation compensates for the usually lower formability of aluminum sheets, so that components which were previously only possible with steel can now also be produced in aluminum using the same tools: e.g. as prototypes for testing and comparing with steel parts.
  • the hold-down device only needs to be moved in front of the punch to the extent that the sheet can buckle against the punch with a pre-strain (in general 2% -5%) to be defined, and the punch does not have to be sealed against the hold-down.
  • the matrix can be one-piece.
  • the active medium to a temperature of 150 ° C to 300 ° C, preferably 160 ° C to 200 ° C, heated.
  • a liquid active medium which can be heated in the pressure accumulator by means of heating coils or the like.
  • a gaseous active medium can also be heated if necessary.
  • the inventive method is particularly suitable for the production of relatively flat components, in particular, the amount of preforming 100 to 200 mm and the maximum height of the formed workpiece between 100 and 250 mm, preferably 100 to 200 mm, with a minimum width of more than 600mm to 1000mm, preferably 700-800mm.
  • This allows the workpieces be made with thermoforming devices with a corresponding maximum depth of drawing, for example, 400 to 500 mm.
  • the device comprises a first tool and a second tool for clamping the workpiece, a pressure accumulator for receiving an active medium, with which the workpiece is preformable in a first direction by pressurization, and a forming die for forming the workpiece in a second opposite to the first direction Direction, wherein the active medium during the forming by the movement of the forming die in the pressure accumulator can be introduced.
  • a cavity is provided in one of the tools in which the active medium not located in the pressure accumulator is received.
  • a liquid active medium is used, which is accommodated in a cavity of one of the tools.
  • the tool in which the cavity is formed at least two mutually movable parts, which are adjusted for preforming of the workpiece relative to each other.
  • the volume of the cavity is effectively changed and thereby the active medium pressed into the workpiece.
  • the active medium in this embodiment is almost incompressible.
  • the tool in which the cavity is formed a plurality of pistons, which are adjustable for preforming of the workpiece so that the volume of the cavity can be reduced or increased.
  • the operation is otherwise similar to the two-part embodiment.
  • Such a "cylinder pad" can be installed in one of the two tools.
  • the device can be prepared by converting a conventional thermoforming device by a pressure accumulator is provided for the active medium, and corresponding inlet openings for introducing the active medium from the pressure accumulator into the cavity.
  • a pressure accumulator is provided for the active medium, and corresponding inlet openings for introducing the active medium from the pressure accumulator into the cavity.
  • the inlet openings of vent holes be formed.
  • vent holes are already present in existing thermoforming devices and can be used simply as feed openings when retrofitting to a device according to the invention. This makes it very easy to retrofit an existing device in such a way that it can carry out the method according to the invention.
  • the vent holes are drilled something and thereby increased.
  • the device both liquid and gaseous active medium - further adaptable for deep drawing of different shapes that only the forming die and the clamping ring of the two tools are exchanged, while the tool in which the cavity is formed, for deep drawing different geometrically similar shapes is usable.
  • the device can be easily converted to produce various components.
  • a compressed air reservoir is provided, which is equipped with a booster for an increase in pressure.
  • the reboiler / intensifier may e.g. increase the pressure from 10 bar to 25 to 30 bar.
  • the pressure booster is controllable such that the pressure in the cavity can be adjusted and in particular during the preforming and / or forming an advantageous predetermined pressure profile.
  • one of the tools has a holding-down device and a forming die, wherein the tool is designed such that the holding-down device can precede the forming punch by a distance of up to 20% of the diameter of the forming punch. This ensures a sufficiently large preforming.
  • the second tool is constructed at least in two parts, that the at least two parts of the second tool are adjustable relative to each other and that by an adjustment of the parts of the second tool relative to each other, a preforming of the workpiece by means of the active medium in the direction of Umformstempels is effected.
  • the parts of the second tool each have a boundary wall of the cavity, that is, the cavity adjacent to both a first and a second part of the second tool.
  • the second tool preferably comprises an inner part and a particular annular outer part.
  • at least one boundary wall of the cavity is movable for performing the method step of preforming the workpiece.
  • the movable boundary wall is preferably formed on the outer part of the second tool, wherein the outer part can also form a clamping element for clamping the workpiece.
  • the at least two parts of the second tool are thus preferably mutually adjustable and sealed from one another such that the workpiece is preformable by the active medium in the direction of the forming die. The preforming is thus effected by the adjustment of the parts of the second tool relative to each other.
  • the cavity or active media space or the second tool has a fixed bottom area and a side wall area which can be moved in the direction of movement of the forming die.
  • the fixed floor area can in particular be coupled to a table (press table) and in particular be formed on the inner part of the at least two-part tool.
  • the movable side wall region is preferably formed on the outer part of the second tool and movable relative to the table, in particular in the vertical direction.
  • an outer part of the second tool and a clamping element of the first tool are arranged movable relative to a device base and that both the outer part of the second tool and the clamping element of the first tool can be acted upon by a pressing force.
  • the outer part of the second tool is preferably designed as a further clamping element, so that an edge region of the workpiece between the clamping element of the first tool and the clamping element of the second tool can be clamped is.
  • Both clamping elements are movable relative to a device base, for example a table.
  • the two clamping elements are each connected to a feed device, for example a plunger.
  • the workpiece and / or the device, in particular the forming die are preheated before the preforming and / or before the forming of the workpiece, in particular to the above-mentioned temperatures.
  • the device has no hydraulic unit or additional pumps for the active medium.
  • FIGS. 1 to 3 show an exemplary embodiment of a device 10 according to the invention for forming, in particular deep drawing of workpieces 2 (boards), in particular for performing an active media-based forming.
  • the device 10 comprises a first tool 20, which in the illustrated embodiment is an upper tool.
  • the apparatus 10 further includes a second tool 40, which in the illustrated embodiment is a lower tool.
  • a workpiece 2 is clamped between the first tool 20 and the second tool 40 along its edge region.
  • the first tool 20 comprises a clamping element 24 and a hold-down and the second tool 40, an outer part 44, which may also be referred to as a second clamping element.
  • An edge region of the workpiece 2 can be clamped between the hold-down 24 and the outer part 44.
  • Hold-down device 24 and outer part 44 are movable relative to one another in an axial, in particular vertical direction, in order to tension the workpiece 2. Downholder 24 and outer part 44 may also be referred to as the first and second clamping or clamping element.
  • the first tool 20 further comprises a forming die 22 which is movable in the axial direction relative to the hold-down 24.
  • the forming die 22 is arranged stationary (relative to a fixed base of the device 10) and the hold-down 24 is movable relative to the base in the axial direction.
  • the forming die 22 (drawing punch) is provided for forming the workpiece 2 with a front-side forming geometry.
  • a cavity 46 for receiving a fluid active medium is provided, against which the workpiece 2 by means of the forming die 22 is deformable.
  • the cavity 46 active media space
  • the cavity 46 is closed at its the workpiece 2 or forming die 22 facing surface with a membrane 50 and sealed in this way against the workpiece 2.
  • a fluid passage 48 (fluid line), which is preferably formed in the outer part 44 of the second tool 40, opens into the cavity 46.
  • the second tool 40 further comprises an inner part 42, which is movable relative to the outer part 44 in the axial direction and forms a bottom portion of the cavity 46.
  • the circumferential (annular) outer part 44 forms a connected to the bottom portion of the cavity 46 side wall portion.
  • Inner part 42 and outer part 44 are sealed by circumferential sealing rings 52 to each other, so that active medium can not escape even under elevated pressure.
  • the fluid passage 48 is connected via a controllable flow device 58, in particular a control or regulating valve, with a pressure accumulator 60 for receiving active medium.
  • the active medium can thus pass from the cavity 46 into the pressure accumulator 60 and vice versa.
  • the outer part 44 of the second tool 40 is moved in the axial direction relative to the inner part 42, in particular downwards, in particular relative to one Device base 12 or a table.
  • the (defined) cavity formed by the flat resting workpiece 2 decreases, so that the workpiece 2 bulges in the direction of the forming punch 22 (upwards), see Fig. 2 .
  • the outer part 44 is connected, for example by means of a plurality of plunger 54 (pull ram) with a die cushion, not shown in the figures.
  • the outer part 44 (movable ring, outer ring) with the required contact pressure (for aluminum well ⁇ 5,000 kN) pressed down, it is due to the remaining in the middle of the second tool 40 "active media pad" (Emulsion pad) a curvature of the workpiece 2 automatically.
  • This preforming of the workpiece 2 is preferably pressure-controlled, in particular with passively controlled pressure, by means of the flow-through device 58.
  • the flow-through device 58 can be arranged directly on the second tool 40. For preforming, therefore, no additional units, in particular no hydraulic unit, are required. The preforming takes place, in particular, without the introduction of active media into the active-medium space or cavity 46.
  • an inner region of the workpiece 2 is curved upwards and is preferably located approximately centrally on the forming die 22. This condition is in FIG. 2 shown.
  • the forming die 22 is moved in the direction of the cavity 46, wherein in principle a movement of the forming die 22 and / or the cavity 46 is possible.
  • the outer part 44 can be further moved relative to the inner part 42.
  • the stamp is in particular pressed into the previously formed active media pad (ie in the cavity 46), whereby the workpiece 2 (sheet) is gradually "zoomed" to the forming die 22.
  • the thereby displaced active medium is, by pressure control by means of the flow device 58, pressed into a preferably directly on the second tool 40 arranged pressure accumulator 60.
  • the pressure accumulator 60 may in this case also comprise a plurality of storage containers. From the pressure accumulator 60, the active medium with the start-up or the return movement of the blank holder 24 controlled back flow into the cavity 46 (water tank). The end of the forming step is in Fig. 3 represented, in which the workpiece 2 was formed between forming die 22 and active medium.
  • a gas in particular compressed air (for example nitrogen and / or oxygen) can also be used as the active medium, in particular in the case of a reverse installation of the tools (first tool with punch and holding down on a die cushion and second tool above).
  • a gas in particular compressed air (for example nitrogen and / or oxygen) can also be used as the active medium, in particular in the case of a reverse installation of the tools (first tool with punch and holding down on a die cushion and second tool above).
  • compressed air for example nitrogen and / or oxygen
  • a pressure accumulator 60 a commercially available compressed air cylinder, e.g. with compressed air, nitrogen or oxygen.
  • a pressure booster (not shown) is used to increase the pressure.
  • the pressure intensifier is controllable, i. the pressure of the active medium can be adjusted (controlled or regulated) via the pressure intensifier.
  • the gas line 48 from the pressure accumulator 60 to the cavity 46 has a flow-through device 58, in particular a valve, which can be at least opened and closed.
  • the flow device 58 is controllable in advantageous embodiments, so that the pressure of the active medium can be adjusted by them and regulated and controlled in the course of preforming and forming, that a certain pressure profile is achieved.
  • the punch 22 is arranged here in the lower tool 20, while the - here one-piece - upper tool 40, the die 43, an outer part 24 and the cavity 46 includes.
  • the cavity 46 is not a space in which pressure medium is already accommodated prior to the preforming, but rather the more or less large space between the die and the clamped workpiece 2.
  • a circumferential Sealing element 50 may be present for the pressure-tight sealing of the workpiece 2 with respect to the outer part 24 of the upper tool.
  • the hold down 44 is ramped up beyond the punch 22 by the distance required for the desired pre-strain (eg 2-10%) and clamps the workpiece 2 between itself and the outer portion 24 of the upper tool 40 (please refer FIG. 5 ).
  • the compressed air is introduced immediately after the closing and the construction of the pressure required for sealing in the die cushion in the upper die or cavity 46, whereby the workpiece 2 buckles down the punch, for example, until it touches the punch 22.
  • the end of this step is in FIG. 5 shown.
  • the punch 22 is moved upwards, so is pressed into the cavity 46, whereby the workpiece 2 is gradually "zoomed" to the forming die 22.
  • the end of this step is in Fig. 6 shown.
  • the die 43 has the counter-shape to the forming die 22, so that the workpiece 2 practically abuts the die 43 at the end of the forming step and the volume of the cavity 46 is very small or has been reduced to zero.
  • the thereby displaced gaseous active medium is pressed through the gas line 48 back into the pressure accumulator 60 and is available there for the next preforming step. It is thus preferred that a closed circuit is also produced with the gaseous active medium.
  • the second tool 40 (die 43) could remain at the top of the device for a whole family of components having similar dimensional ratios and different materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP17175477.3A 2017-06-12 2017-06-12 Procédé et dispositif de façonnage Withdrawn EP3415247A1 (fr)

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Cited By (7)

* Cited by examiner, † Cited by third party
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CN109834152A (zh) * 2019-03-13 2019-06-04 中南大学 一种板材电磁力反胀拉深成形方法及成形装置
CN110153263A (zh) * 2019-05-17 2019-08-23 陕西飞机工业（集团）有限公司 一种基于液压的小圆角特征铝合金薄板零件加工方法
CN110788193A (zh) * 2019-10-29 2020-02-14 威海林润新材料科技发展有限公司 一种可控介质冷冲压成形工艺方法及其模具结构
CN111589931A (zh) * 2020-06-01 2020-08-28 安徽工业大学 基于动静组合液池的板料双面控压充液拉深成形方法
CN114210823A (zh) * 2021-11-24 2022-03-22 哈尔滨工业大学 一种多位加载柔性介质复合超塑成形装置及其方法
DE102021000927A1 (de) 2021-02-22 2022-08-25 Siempelkamp Maschinen- Und Anlagenbau Gmbh Presse zum Bearbeiten eines Werkstücks
DE102021000928A1 (de) 2021-02-22 2022-08-25 Siempelkamp Maschinen- Und Anlagenbau Gmbh Presse zum Bearbeiten eines Werkstücks

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DE19624036A1 (de) * 1996-06-17 1997-12-18 Matthias Prof Dr Ing Kleiner Verfahren und Werkzeugsystem zum pneumomechanischen Tiefziehen
DE19717953A1 (de) * 1997-04-28 1998-10-29 Bayerische Motoren Werke Ag Verfahren zum hydromechanischen Stülpziehen von Metallblechen
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
DE10164662A1 (de) * 2001-12-28 2003-07-17 Klaus Siegert Vorrichtung zum hydromechanischen Tiefziehen
DE10347601A1 (de) * 2003-10-14 2005-05-19 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum hydraulischen Hochdruckumformen einer Platine

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Publication number Priority date Publication date Assignee Title
DE19624036A1 (de) * 1996-06-17 1997-12-18 Matthias Prof Dr Ing Kleiner Verfahren und Werkzeugsystem zum pneumomechanischen Tiefziehen
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CN109834152B (zh) * 2019-03-13 2020-10-27 中南大学 一种板材电磁力反胀拉深成形方法及成形装置
CN110153263A (zh) * 2019-05-17 2019-08-23 陕西飞机工业（集团）有限公司 一种基于液压的小圆角特征铝合金薄板零件加工方法
CN110788193A (zh) * 2019-10-29 2020-02-14 威海林润新材料科技发展有限公司 一种可控介质冷冲压成形工艺方法及其模具结构
CN110788193B (zh) * 2019-10-29 2021-04-13 威海林润新材料科技发展有限公司 一种可控介质冷冲压成形工艺方法及其模具结构
CN111589931A (zh) * 2020-06-01 2020-08-28 安徽工业大学 基于动静组合液池的板料双面控压充液拉深成形方法
CN111589931B (zh) * 2020-06-01 2021-07-23 安徽工业大学 基于动静组合液池的板料双面控压充液拉深成形方法
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CN114210823A (zh) * 2021-11-24 2022-03-22 哈尔滨工业大学 一种多位加载柔性介质复合超塑成形装置及其方法

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