• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU1727521A3
    申请号:SU4028577
    申请日:1986-12-02
    公开日:1992-04-15
    发明作者:Де Сме Габриель
    申请人:Юзинор Асье (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to sheet stamping.
    The purpose of the invention is to obtain stamped parts of medium depth, but with large surfaces, such as automotive parts, the central parts of which almost never have surfaces of rotation, but are complex shapes that can not be scanned.
    FIG. 1-5 show schematically sectional views of a punching device during the successive steps of forming a part; in fig. 6 and 7 are sectional views of a punching device for manufacturing complex parts.
    The method is implemented on a double acting press using a fluid with the periphery of the workpiece.
    The first phase of the punching operation consists in realizing the bending of the peripheral local edges (Fig. 2) of the sheet with the outer slider 1.
    The first phase simultaneously provides for the implementation of the curved surface of the preforming, which causes the sheet to bulge and avoids wrinkling.
    Such a buckling is limited to several moments: 1) the displaced volume of the elastomer, which determines the curved surface of the sheet; 2) the proximity of the punch, which eliminates the erratic deformation of the sheet and requires preliminary deformation; 3) peripheral clamping of the sheet blank, which is configured to limit the two-dimensional expansion of the sheet to a small value of 3-5%, and this value avoids the formation of folds.
    Fundamentally, the curvature of the surface is obtained by multidirectional bending of the sheet, which during the second forming operation and the last phase of the forming operation, which will change
    these curvilinear forms provide a high potential for reconfiguration to obtain these forms.
    In the preforming process, a bulging surface is obtained, the area of which is approximately equal to the surface area of the finished product, and during the final molding, the relief and angular zones of the central part of the preform are formed by additional influence on the fluid.
    In the first embodiment shown in FIG. 1-5, the device is shown in a pre-forming position, which has in its composition the usual constituent elements of a double-acting press and therefore only a part relating to the elements of the device is represented.
    The outer slider 1 carries on its outer part the clamp 2 of the workpiece, which interacts with the open end 3 of the container 4, on which is placed the sheet 5 for stamping.
    The container 4 contains fluid 6 of elastic material occupying its entire surface. The surface of the butt 3 for maintaining the sheet 5 is located at a level exceeding the level of the upper working surface 7 of the fluid 6.
    The outer slider 1 has an annular matrix 8, the outer diameter of which is smaller than the inner diameter of the container 4 in such a way that the bottom surface 9 of the annular matrix 8 (as viewed from the side of the sheet 5) can penetrate the container 4 in the absence of sheet 5 and reach the fluid 6 from the elastic material causing it to flow.
    The central slider 10 carries the base 11 of the central matrix.
    The outer slider 1 and the central slider 10 are actuated simultaneously and form the working cavity of the matrix with their lower surface 9 and the base 11, and the fluid 6 from the elastic
    material in the process of work plays the role of a punch ..
    Fluid 6 of an elastic material is made of an elastomer having a Shore hardness of not more than 30, which is an essential characteristic for the time of rapid return of the material (preferably less than 1 s) to its original shape. You can, for example, use a silicone-based material.
    The base 11 of the central matrix, carried by the central slider 10, is made of easily processed or molded material, such as plastic, in particular polyurethane, polyepoxide compounds, polyester, concrete, concrete with resin additives, composite materials, and it is possible to reinforce these materials with fibers, in particular fiberglass or solid wood, such as boxwood.
    The inwardly discharging means 12, which are pins or inflatable shells, enter fluid 6 and their implanted volume approximately represents the volume of increase in fluid 6 after forming.
    Fluid 6 has a channel 13 that circulates coolant or compressed air. The other channel 14 may serve to remove the finished part 15, in particular when using compressed air. For cooling the mass of the fluid 6, it is also possible to provide reinforcement with metal filaments or filling with a metal powder that improves thermal conductivity.
    FIG. 2. The stage of local bending of the periphery of the sheet 5 is shown.
    In the step shown in FIG. 2, lower the outer slider 1 carrying the annular matrix 8. It comes in contact with the sheet 5, the peripheral part of which is gradually clamped between the clamp 2 and the end 3 in order to avoid its scalding.
    During the descent process, the annular matrix 8 forms the bent edge of the sheet 5 and simultaneously compresses the fluid 6. The latter, under the influence of peripheral compression, flows into the central zone of the sheet 5 and provides preforming.
    The bulging of the central part of the sheet 5 is limited to the base 11 of the central matrix in order to avoid uncontrolled deformations due to metal anisotropy or asymmetric shape of parts. The descent of the outer slider 1 is limited so that the deformation in the central part of the sheet 5 gives the surface
    which is approximately equal to the surface of the final part.
    FIG. Figure 3 shows the stage of final molding of the part 15. The central slider 10, carrying the base 11 of the central matrix, lowers to its lower position and causes the final molding of the central part of the sheet 5, previously formed during the previous operation.
    The compressive stresses caused by the support of the base 11 of the central matrix on the top of the sheet 5, by the action of the fluid on the opposing surface of the sheet 5, are transformed into tensile stresses acting on the entire surface of the sheet 5 not compensated by the presence of the base 11 and cause this sheet 5 to move in all available volume.
    These stresses (compression, tension) thus tend to be equal to zero (up to the efficiency of the material of the fluid), thus ensuring the final execution of the part with a minimum change in thickness.
    FIG. Figure 4 shows the stage of decompression of the fluid 6 by lowering the pins 12. This operation is intended to avoid deformation of the stamping part 15 due to the expansion reaction of the fluid elastomer.
    FIG. 5 shows the step of removing the formed part 15 by simultaneously raising two sliders 1 and 10 carrying the matrix. To limit heating of the fluid 6, in particular during serial operation, provide circulation of compressed air in the channels 13. Cooling of the fluid 6 can also be performed at the previous stage of decompression. In addition, the compressed air is directed through the channels 14 to ensure the separation of the part 15.
    By option, the display:;. JOMy in FIG. 6, the outer slider 1 bears an annular matrix 8, which in its corners has a corresponding relief, for example, of a convex shape, i.e. the protrusion 16, made together with her; this protrusion 16 corresponds to an excess surface with respect to the volume of the part being formed, which is required to be realized; the active bottom surface 9 of the matrix is carefully polished to ensure the transfer of excess material during the formation; this active bottom surface 9 may also be treated to facilitate sliding of the sheet material.
    In another embodiment, the embodiment of FIG. 6, shown in FIG. 7, the outer slider 1 carries an annular matrix 8, in which a concave relief is made, i.e. cavities 17, which play the same role as the projections 16 in FIG. 6, the location of which is chosen for reasons of optimization of the stamped part 15. Thus, the cavities 17 can be located in the stamping zones, which will be eliminated when cutting the periphery of the part 15. It is also possible to place the relief 18 in the base 11 of the central die fixed to the central slider 10, if this relief 18 is located in the central zones of the part 15, which will be eliminated by cutting in the finished part or when this latter corresponds to the part of the sheet located under the outer slider 1.
    This option is intended for the manufacture of complex shapes with distinct angles in the central part of the stamping.
    The pressure required for pre-forming the sheet is very small (the maximum pressure is in the range of 10-20 bar / 1-2 MPa).
    Such a low pressure regime allows the formation of large surfaces and the creation of a new double-action tooling technique with a matrix of low-hardness Shore elastomer, which can be adapted to existing body presses.
    The proposed method can be used to form sheet material, i.e. thin plates (metal), as well as for thin plates, in particular of plastic material.
    Among the plastics that can be formed by the proposed method include: polybutylene; polyethylene, chlorinated polyethylene, polypropylene, PVC; chlorinated PVC, ABS resin (acrylonitrile, butadiene, styrene), polycarbonate, polyphenylene oxide, polysulfone, chlorotrifluoroethylene, cellulose acetate, cellulose acetate, polyacetal, phenoxy, Nylon 6, Nylon 66. Plastic materials should also be understood composite materials, possibly reinforced.
    The method can also be used for thermoforming sheet materials. In this case, the materials can be preheated to a temperature that would not destroy the material of the elastic cushion.
    权利要求:
    Claims (11)
    [1]
    1. A method of stamping sheet materials on a double-acting press using a fluid with a periphery of a sheet blank, characterized in that initially the local periphery of the blank is carried out and the central part of the blank is pre-molded by bulging the fluid to obtain a surface area approaching the finished surface products and then final molding
    0 relief and corner zones of the central part by an additional impact on the fluid,
    [2]
    2. A device for stamping sheet materials containing a hollow container
    5 with a fluid medium whose working surface is displaced inside the container, an annular matrix installed with the possibility of entering the container cavity and interacting with the fluid medium, central
    0 matrix and clamping, excluding that, in order to ensure the implementation of the method on double-acting presses having a central and outer slide, the annular matrix is equipped with at least
    5 with one bending section and fixed on the outer slide of the press together with the clamping gripping it, installed with the possibility of interaction with the open end of the container, made with the pressing surface, the central matrix is fixed on the inner slide of the press, and the container is fixedly mounted.
    [3]
    3. The device according to claim 2, that is, with the fact that the ring matrix is supplied according to
    5 at least one additional embossed work area.
    [4]
    4. The device according to claim 2, that is, that the central matrix is provided with at least one additional
    0 relief work area.
    [5]
    5. Device on PP. 2 and 4, characterized in that the fluid is made of an elastomer with a Shore hardness of less than 30.
    [6]
    5 6. The device according to PP. 2 and 4, characterized in that the central matrix is made of easily machinable material such as plastic.
    [7]
    7. The device according to claim 2, that is, with the fact that the central matrix is made of a material reinforced with solid fibers like glass fiber.
    [8]
    8. The device according to claim 2, of which it is provided with means for discharging the fluid.
    [9]
    9. The device according to claim 8, wherein the means for discharging the fluid are installed with the possibility of entering the cavity of the container and interacting with the fluid.
    [10]
    10. The device according to claim 2-9, characterized in that it is provided with cooling means arranged in a fluid.
    [11]
    11. The device according to claim 2-10, characterized in that it is provided with means for removing the finished product from the fluid.
    Fig.Z
    N
    eight
    1h
    W SHRSCHZHZH1 h
      :
    l.a
    FIG. b
    1h
    one
     :
    l.a
     7
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1727521A3|1992-04-15|Device for and method of sheet forming
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    JPS6152939A|1986-03-15|Producing method of die for compression molding
    JP2000176557A|2000-06-27|Method for deep draw forming and device therefor
    同族专利:
    公开号 | 公开日
    KR950003541B1|1995-04-14|
    BR8605934A|1987-09-15|
    HUT43515A|1987-11-30|
    JPH0255126B2|1990-11-26|
    AU7111787A|1988-10-06|
    NO166170C|1991-06-12|
    NO864816L|1987-06-05|
    IL80706D0|1987-02-27|
    EP0231677B1|1989-05-03|
    NO864816D0|1986-12-01|
    AT42698T|1989-05-15|
    US4770015A|1988-09-13|
    GR3000065T3|1990-10-31|
    CN1009623B|1990-09-19|
    PT83850A|1987-01-01|
    DK159759C|1991-08-05|
    MX161003A|1990-06-29|
    KR870005710A|1987-07-06|
    CZ888686A3|1993-11-17|
    FR2590814A1|1987-06-05|
    CZ279500B6|1995-05-17|
    DE3663116D1|1989-06-08|
    PT83850B|1990-03-08|
    DK159759B|1990-12-03|
    IE59211B1|1994-01-26|
    DK582486D0|1986-12-03|
    FR2590814B1|1988-02-26|
    AU587694B2|1989-08-24|
    ES2008857B3|1989-08-16|
    ZA868833B|1987-07-29|
    IE863174L|1987-06-04|
    DK582486A|1987-06-05|
    DD252560A5|1987-12-23|
    NO166170B|1991-03-04|
    HU210052B|1995-01-30|
    EP0231677A1|1987-08-12|
    CN86107980A|1987-07-29|
    CA1275867C|1990-11-06|
    JPS62134122A|1987-06-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2527463C1|2013-05-28|2014-08-27|Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации |Method of moulding impact-resistant transparent polymer sheets|US422883A|1890-03-04|heywood |
    US2422883A|1942-01-24|1947-06-24|Douglas Aircraft Co Inc|Method and apparatus for flanging sheet metal|
    GB603683A|1945-10-27|1948-06-21|Helliwells Ltd|An improved method and means of shaping sheet-metal under pressure|
    US2602411A|1949-08-02|1952-07-08|Michael S Schnell|Means for drawing material|
    US2749867A|1952-12-03|1956-06-12|John H Engel|Controlled pressure metal forming apparatus|
    US3380272A|1965-12-27|1968-04-30|Kaiser Aluminium Chem Corp|Apparatus for forming foil containers|
    US3552165A|1968-05-22|1971-01-05|John H Taylor|Domestic-pan-forming device|
    DE2131811A1|1971-06-23|1972-12-28|Siemens Elektrogeraete Gmbh|Device for deep drawing tubular workpieces|
    US3914969A|1973-04-18|1975-10-28|Nasa|Apparatus for forming dished ion thruster grids|
    US4145903A|1978-04-03|1979-03-27|Textron Inc.|Sheet forming method and apparatus|
    SU863075A2|1980-01-21|1981-09-15|Кишиневский завод "Сигнал"|Drawing die|
    FR2564339B1|1984-05-17|1987-12-24|Usinor|METHOD AND DEVICE FOR STAMPING SHEETS.|
    GB8421634D0|1984-08-25|1984-09-26|Alcan Int Ltd|Forming of metal articles|FR2641215A1|1988-12-30|1990-07-06|Isoform|DEVICE FOR STAMPING SHEET MATERIALS|
    FR2641216B1|1988-12-30|1994-04-01|Isoform|PROCESS AND DEVICE FOR STAMPING SHEET MATERIALS WITH DEFORMABLE PUNCHER UNDER DIVER|
    FR2641217B1|1988-12-30|1994-04-01|Isoform|METHOD AND DEVICE FOR SCRAPPING SHEET MATERIALS ON AN ELASTIC FORMING MATRIX|
    FR2670408B1|1990-12-18|1995-03-17|Isoform|
    FR2683168B1|1991-11-04|1994-03-04|Isoform|DEVICE FOR STAMPING SHEET MATERIALS, PARTICULARLY SHEET SHEET.|
    FR2691653B1|1992-05-27|1994-08-26|Isoform|Device for stamping sheet materials on a forming matrix of elastic material.|
    FR2715335B1|1994-01-21|1996-04-05|Lorraine Laminage|Device for stamping a sheet blank.|
    DE4434799A1|1994-09-29|1996-04-04|Smg Sueddeutsche Maschinenbau|Method and device for forming sheet metal|
    US5540075A|1994-10-25|1996-07-30|Owens-Corning Fiberglas Technology, Inc.|Method and apparatus for shock release of thin foil materials|
    DE19842750B4|1998-09-18|2005-06-09|Audi Ag|Method and production of deep-drawn hollow parts and drawing tool|
    DE19939504A1|1999-08-20|2001-03-08|Konrad Schnupp|Process for operating a forming press|
    US6233989B1|2000-10-13|2001-05-22|Changing Paradigms, Llc|Method and apparatus for stamping a metal sheet with an apertured design having rolled edges|
    CN101920285B|2010-06-08|2012-05-23|东莞市旗丰消声器有限公司|Process method for once drawing and forming semi-shell workpiece of oil tank|
    CN105215127B|2015-10-12|2017-04-26|天津职业技术师范大学|Soft board mold thermal forming device and method based on heterogeneous metal rubber|
    CN105414348A|2015-12-24|2016-03-23|辽宁瑟克赛斯热能科技有限公司|Flexible compression moulding mould for plate sheet of plate heat exchanger|
    CN106984684B|2016-01-20|2021-05-18|福特环球技术公司|Material punch forming method, vehicle ceiling forming method and assembly for forming material|
    CN106001234B|2016-06-08|2018-02-23|广东鸿业机械有限公司|Liquid expansion forming device and hydraulic expansion forming process|
    法律状态:
    2005-05-10| REG| Reference to a code of a succession state|Ref country code: RU Ref legal event code: MM4A Effective date: 20031203 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR8517957A|FR2590814B1|1985-12-04|1985-12-04|METHOD AND DEVICE FOR SCRAPPING LOW ELONGATION SHEETS|
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