EP3015183B1 - Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre - Google Patents

Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre Download PDF

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Publication number
EP3015183B1
EP3015183B1 EP14198750.3A EP14198750A EP3015183B1 EP 3015183 B1 EP3015183 B1 EP 3015183B1 EP 14198750 A EP14198750 A EP 14198750A EP 3015183 B1 EP3015183 B1 EP 3015183B1
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EP
European Patent Office
Prior art keywords
stamp
frame part
forming
sheet
forming press
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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.)
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Application number
EP14198750.3A
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German (de)
English (en)
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EP3015183A1 (fr
Inventor
Peter Amborn
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Individual
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Individual
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Publication date
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Priority to EP14198750.3A priority Critical patent/EP3015183B1/fr
Priority to PCT/EP2015/072243 priority patent/WO2016071042A1/fr
Priority to US15/522,045 priority patent/US10518311B2/en
Publication of EP3015183A1 publication Critical patent/EP3015183A1/fr
Application granted granted Critical
Publication of EP3015183B1 publication Critical patent/EP3015183B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to a forming press for forming a sheet-like blank of metal with at least two mutually movable frame parts, wherein a first frame part has a die with a negative engraving, and wherein the other second frame part has a movable in a space of this frame part stamp, wherein the sheet-like blank above the stamp to form a pressure chamber with the stamp on the receiving the punch Frame part rests, wherein the pressure chamber with a pressurized medium from a pressure generator can be acted upon.
  • the invention also relates to a forming process with such a forming press.
  • Blanket blanks are understood in particular to be plates, blanks and foils.
  • a forming press for forming a sheet-like blank made of metal is known from the prior art according to DE 10 2012 106 299 A1 known.
  • a pressure-tight housing is provided in detail, wherein two frame parts are arranged in the housing, wherein the one upper frame part to the other lower frame part is zuverfahrbar.
  • the one upper frame part has a movable in a cylindrical space of the frame part stamp on which has a positive engraving, whereas on the other lower frame part a die with a correspondingly complementary negative engraving is arranged.
  • the method for forming the sheet-like blank made of metal is that the first gas-based deformation of this blank is made to then in a second step, so if the transformation has already taken place substantially, a mechanical final formation of the sheet blank at the sections of Matrize takes place, which are characterized by small radii. Because according to the teachings of the prior art, it is such that relatively large degrees of deformation can be achieved relatively easily and quickly with the gas pressure forming, but the formation of small radii at equally high degrees of deformation requires a disproportionately high pressure on the blank, which is such a one-step process when small radii need to be reshaped, making them uneconomic.
  • the forming of the sheet-like metallic blank takes place according to the prior art by generating a gas pressure by the stroke of the punch or the Frame parts to each other. Furthermore, this reference also teaches to provide higher pressures for forming by increasing the temperature. However, it is also taught to reduce the compression stroke and / or increase the final pressure the pressure chamber after sealing, but even before the start of the actual compression stroke to charge by gas pressure, which has been generated during the previous press stroke.
  • the pressurized gas may have been cached in a pressure vessel.
  • the object underlying the invention is to provide an inexpensive solution for the forming of a sheet-like blank made of metal.
  • a pressure generator a compressor, for.
  • As a compressor which is able to provide the required for the conversion of sheet-like blanks pressures of up to 60 bar and more.
  • the volume of air generated by the pressure generator as a function of the current pressure in the pressure chamber is regulated or controlled. This means that at the beginning of the deformation, the pressure can be relatively low, and only at the final formation, that is, when The blank should apply at high degrees of deformation to small radii, this is done by a corresponding increase in pressure. That is, it is possible via a control or regulation, the specification of a pressure profile, which is closely adapted to the corresponding degrees of deformation.
  • the punch can have a positive engraving that is at least partially complementary to the negative engraving of the die. This ensures that after a gas pressure forming advantageously mechanical, so ultimately by the engraving, sections with small radii can be formed relatively quickly endausge.
  • the method is insofar then formed in two stages.
  • the stamp is pressure-tight in the space of the other second frame part slidably guided.
  • a radially encircling piston seal is provided, for example at least one piston ring. This ensures that the gas pressure remains stable over a longer period, and insofar as the gas pressure can act on the blank for a long time.
  • piston rings as a puncture seal small precision errors, which can arise as a result of heating, can be compensated. It is also conceivable to store the frame parts floating, in order to compensate for precision errors during operation can.
  • the die of a first frame part and / or the punch of the other frame part in each case at least one temperature control, which is controllable or regulated.
  • the tempering device it is made possible to heat the sheet-like blank made of heat-transformable material, in particular of metal, to the forming temperature which is preferably above about 300 ° C. for hot-formable materials, in particular metal, wherein the blank may also already be preheated externally can.
  • the external preheating of the blank ensures short cycle times.
  • the heating of the sheet-like blank depending on the metal to be formed z.
  • a ferritic stainless steel up to about 1,100 ° C.
  • the stamp is sealed by at least one radially encircling piston seal, in particular at least for round punches by at least one, preferably a plurality of piston rings relative to the space in the frame part.
  • the seal opened by the piston seal and the relatively small volume pressure chamber the ability to use noble gases economically, z. B. in the transformation of magnesium alloys.
  • the tempering individually controlled and regulated to possibly nachfahren a predetermined temperature profile can, the temperature profile can be dependent on the desired degrees of deformation at the corresponding points of the sheet-like blank.
  • the die of a first frame part in the region of the support on the other second frame part has a tempering device, wherein corresponding to the other second frame part in the region of the support for the sheet-like blank also a tempering can have.
  • the bottom of the die has a tempering device. That is, by such a tempering, also in the form of a heater, there is the possibility of heating the die as a whole.
  • the stamp also advantageously has a tempering device in the form of a heater in the region of the upper side of the stamp. From this it is clear that not only the punch and the die are centrally heated, but also that the edge region of both the punch and the die, ie the areas where the two frame parts collide and finally for the fixation and sealing of the sheet-like blank ensure, are tempered, so in particular heated to accomplish just in this part by a preselectable temperature profile a tracking of the material, especially at tight radii with correspondingly high degrees of deformation.
  • the starting position of the punch in the particular cylindrical space of the other second frame part is such that the punch is located with or without engraving directly in front of the blank sheet, but without deforming it in the starting position.
  • the engraving may abut the flat blank at its highest elevation; in the case of a stamp without engraving, ie if the forming is to take place only via the corresponding air or gas pressure, this stamp with a minimum Distance or slightly adjacent is located in front of or on the sheet-like blank. This is to ensure that the pressure can form over the entire surface of the blank and the blank is not scratched or damaged.
  • the space below the punch communicates with the space formed by the engraving of the die through a compensation line. In other words, this prevents the deformation-damaging increase in the pressure on the die-facing side of the blank, in particular during the final shaping.
  • the compensation line when the compensation line is in communication with a pressure generator to generate an overpressure between the die and blank to eject the finished workpiece controlled by the pressure in the space between the die and the tool.
  • the formed workpiece In the case of the sealed space below the punch, the formed workpiece can be automatically pushed out of the die due to the punch back movement while simultaneously opening the tools.
  • an externally controllable compressed air management with all combinations can be provided.
  • the invention likewise relates to a method for forming a sheet-like blank in a forming press as it is the subject matter of the preceding statements.
  • the process is characterized by several steps, which are described in detail as follows. First, the sheet-like blank, especially in the preheated state is placed on the other second frame part. Then the frame parts are closed, so that the sheet-like blank between the Rack parts is kept sealed. Then the stamp is approached to the sheet-like blank to form the pressure chamber. In this case, however, it is ensured that the blank is not deformed by the engraving of the stamp, provided that the stamp has an engraving. Then, the heating of the sheet-like blank takes place on a specific with respect to the material of the sheet blank forming temperature.
  • the desired forming temperature can be, for example, between 300 ° and 1100 ° C for light metals as well as certain copper alloys and 700 ° to 1100 ° C for steel-like alloys as well as copper alloys and titanium alloys depending on the material to be formed.
  • the blank can already be preheated introduced into the press, which significantly reduces the cycle times. After the frame parts have been moved towards each other, and thus the pressure chamber, which is formed by the sheet-like blank on the one hand and the punch in the cylindrical space of the frame base, is sealed, the pressure space thus formed with a pressurized gas, which is selected depending on the alloy is charged.
  • the closing of the racks can be done in different ways; once, as shown in the drawings, from bottom to top, that is, the frame base is moved simultaneously including stamp up or the frame base is fixed and the frame top is to move down on the frame base.
  • the position of the die in the frame top has the advantage that the component can be removed more easily after forming.
  • the forming process can also take place in two stages insofar as in the first stage, the forming of the sheet-like blank is carried out by gas pressure, and in the second stage, the final formation of the sheet-like blank takes place mechanically by pressing the punch into the die, as in detail already to others Has been explained.
  • FIGS. 1 to 5 is on the press upper part 2 of the forming press 1, the thermally insulated frame top 6 and attached to the press base 3, the frame base 7. Both frame parts are heatable, as described elsewhere.
  • the insulation in each case shows the reference numeral 9.
  • the frame top 6 has the also designated thermally insulated die 8 with the negative engraving 10th which is arranged interchangeably in the frame top in relation to the project, corresponding to the die, the frame base has the punch, designated 12, with the positive engraving 14, which is complementary to the negative engraving 10 of the die 8. That is, the positive engraving 14 of the punch 12 corresponds to the shape of the negative engraving 10 of the die 8 for forming the workpiece 42 from the blank sheet 26.
  • the punch 12 which is displaceably mounted displaceably in the cylindrical space 16 formed by the frame base 7, shows a plurality of piston rings 18.
  • the piston rings 18 provide primarily for a seal of the punch 12 relative to the cylindrical space 16.
  • the piston rings that even at temperatures of the punch 12 of up to 1100 ° C for heating the positive engraving 14 with the aim of heating the blank 26, the punch 12 in the cylindrical space 16 is still movable; because by the piston rings 18, a different thermal expansion of the punch 12 on the one hand to the cylindrical space formed by the frame base 16 on the other hand can be compensated. That is, a "seizure" of the two components is highly unlikely even at very different temperatures and different materials. This in contrast to the prior art, which does not show such piston rings.
  • a tempering device is provided as heating in the stamp 12, which bears the reference numeral 20.
  • the heater 20 is located on the stamp base below the positive engraving 14 of the stamp.
  • a further tempering device in the form of a heater 23 is arranged in or on the frame base, specifically where the die 8 rests on the frame base 7. corresponding
  • the die 8 in this area also has a tempering device in the form of a heater 22 to at least partially heat the sheet-like blank 26, if necessary from two sides in this area, or to produce a heat profile.
  • a further tempering device in the form of the heater 25 is provided in the bottom region of the negative engraving 10 of the die 8 between the frame top 6 and the negative engraving 10.
  • the pressure chamber 24 is formed by the underside of the sheet-like blank 26, the top of the positive engraving 14 of the punch 12 and by the frame base 7th
  • the pressure chamber 24 is connected by a connecting line 28 with a pressure generator 30 in connection. That is, the pressure generator 30, for example, a compressor, ensures an increase in the gas pressure in the pressure chamber 24th
  • the punch 12 has a piston-cylinder drive 32, which serves for the displacement of the punch 12 in the cylindrical space 16 formed by the frame base 7.
  • FIGS. 2 to 5 Now the process of forming is shown. Starting from the Fig. 2 is the positive engraving 14 in the starting position directly on the underside of the sheet-like blank 26, which is to be reshaped. The two frame parts 6 and 7 are in the extended state.
  • Fig. 3 shows the state in which the two frame parts 6 and 7 are moved together, and now provide together with the blank 26 for sealing the pressure chamber 24.
  • the gas pressure in the pressure chamber 24.
  • the shaping of the sheet-like blank 26 in the negative engraving 10 of the die 8 by the gas pressure is then tracked, ie parallel to the deformation by the gas pressure of the punch 12 is tracked, the gas pressure increases due to the reduction of the gas volume, then possibly in the edge regions already by the positive engraving of the 14 Stamp 12 in conjunction with the negative engraving 10 of the die 8, the mechanical Endausformung, especially in the edge regions with a small radius to accomplish.
  • the invention also encompasses the simultaneous operation of the stamp with the shaping by the gas pressure. Before the mechanical forming process in the wake of the gas forming, it makes sense to at least partially discharge the then harmful gas pressure between the punch and the nearly formed workpiece.
  • a compensation line 36 is provided in the form of a tube between the sealed space 40 below the punch 12 and the space passing through the negative engraving 10 of the die 8 is formed.
  • the state of the Endausformung results from the illustration according to Fig. 4 , Fig. 5 shows a representation in which the blank 26 is formed to the finished workpiece 42.
  • the workpiece 42 is then ejected laterally from the forming press 1.

Claims (11)

  1. Presse de formage (1) pour former une ébauche planiforme (26) en métal avec au moins deux parties de cadre (6, 7) isolées thermiquement et mobile l'une vers l'autre, l'une première partie de cadre (6) comportant une matrice (8) avec une gravure négative (10), et l'autre seconde partie de cadre (7) comportant une étampe (12) mobile dans un espace (16) de ladite partie de cadre, l'ébauche planiforme (26) au-dessus de l'étampe (12) reposant étanchement sur la seconde partie de cadre (7) recevant l'étampe (12) en formant un espace de pression (24) avec l'étampe (12),
    caractérisé en ce
    que l'espace de pression (24) peut recevoir un gaz sous pression à partir d'un générateur de pression (30),
    la matrice de l'une première partie de cadre (6) et/ou de l'étampe (12) de l'autre seconde partie de cadre (7) comportant au moins un dispositif de régulation de température (22, 25) qui est commandable et réglable, le dispositif de régulation de température (22, 25) dans son utilisation chauffant les ébauches planiformes d'un matériau apte au formage à chaud à la température de formage au-dessus de 300 °C souhaitée pour le matériau apte au formage à chaud.
  2. Presse de formage selon la revendication 1,
    caractérisé en ce
    que l'étampe (12) comporte une gravure positive (14) complémentaire au moins partiellement correspondant à la gravure négative (10) de la matrice (8).
  3. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'étampe (12) à l'état d'utilisation de la presse de formage (1) est mobile de bas en haut dans l'espace (16) de l'autre seconde partie de cadre (7).
  4. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'étampe (12) est menée de manière coulissante et étanche à la pression dans l'espace (16) de l'autre seconde partie de cadre (7).
  5. Presse de formage selon la revendication 4,
    caractérisé en ce
    que l'étampe (12) est menée de manière coulissante dans l'espace (16) de l'autre seconde partie de cadre (7) par au moins un joint de piston circonférentiel radial, par exemple une bague de piston (18).
  6. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que pour plusieurs dispositifs de régulation de température, les dispositifs de régulation de température sont individuellement commandables ou réglables.
  7. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la matrice (8) de l'une première partie de cadre (6) dans la région du support sur l'autre seconde partie de cadre (7) comporte un dispositif de régulation de température (22), et l'autre seconde partie de cadre (7) dans la région du support pour l'ébauche planiforme (26) comportant également un dispositif de régulation de température (23).
  8. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'ébauche planiforme (26) est maintenue étanche entre les deux parties de cadre (6, 7).
  9. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la position initiale de l'étampe (12) dans l'espace cylindrique (16) de l'autre seconde partie de cadre (7) est telle que l'étampe (12) avec ou sans gravure positive (14) se trouve directement devant l'ébauche planiforme (26) mais sans la déformer.
  10. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'espace (40) en dessous de l'étampe (12) est lié par une ligne de compensation (36) avec l'espace formé par la gravure négative (10) de la matrice (8).
  11. Presse de formage selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que le volume d'air généré par le générateur de pression (30) est réglable ou commandable en fonction de la pression actuelle dans l'espace de pression.
EP14198750.3A 2014-11-03 2014-12-18 Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre Active EP3015183B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14198750.3A EP3015183B1 (fr) 2014-11-03 2014-12-18 Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre
PCT/EP2015/072243 WO2016071042A1 (fr) 2014-11-03 2015-09-28 Presse de formage et procédé de formage d'une ébauche plate en métal au moyen de deux plaques de bâti mobiles l'une vers l'autre
US15/522,045 US10518311B2 (en) 2014-11-03 2015-09-28 Forming press and method for forming a sheet-like blank composed of metal with two frame parts that are movable towards one another

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14003701 2014-11-03
EP14198750.3A EP3015183B1 (fr) 2014-11-03 2014-12-18 Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre

Publications (2)

Publication Number Publication Date
EP3015183A1 EP3015183A1 (fr) 2016-05-04
EP3015183B1 true EP3015183B1 (fr) 2019-09-04

Family

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EP14198750.3A Active EP3015183B1 (fr) 2014-11-03 2014-12-18 Presse de déformation d'une ébauche plate en métal ayant deux parties de bâti pouvant se déplacer l'une sur l'autre

Country Status (3)

Country Link
US (1) US10518311B2 (fr)
EP (1) EP3015183B1 (fr)
WO (1) WO2016071042A1 (fr)

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US20180221937A1 (en) * 2017-02-06 2018-08-09 Ross Casting And Innovation, Llc Method and Apparatus For Producing A Forged Compressor Wheel
JP7403794B2 (ja) 2019-11-07 2023-12-25 太陽工業株式会社 複動プレス金型
JP7207276B2 (ja) * 2019-11-20 2023-01-18 Ｊｆｅスチール株式会社 プレス成形金型
CN110961543B (zh) * 2019-12-20 2021-12-21 翟述基 高强钢板冲压热成型生产线综合运送料设备

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US5065607A (en) * 1989-10-30 1991-11-19 Teledyne Industries, Inc. Piston and cylinder assembly
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JP3663413B2 (ja) * 2000-03-23 2005-06-22 トヨタ車体株式会社 表面に多数の凸部を有する薄肉金属板の製造方法
DE10153600B4 (de) * 2001-11-02 2005-04-28 Forschungsges Umformtechnik Verfahren und Vorrichtung zum Tiefen mit nachfolgendem hydromechanischen Tiefziehen
US8230713B2 (en) * 2008-12-30 2012-07-31 Usamp Elevated temperature forming die apparatus
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Also Published As

Publication number Publication date
US10518311B2 (en) 2019-12-31
WO2016071042A1 (fr) 2016-05-12
US20170312802A1 (en) 2017-11-02
EP3015183A1 (fr) 2016-05-04

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