EP3645262B1 - Plaque de matriçage d'un moule de presse - Google Patents

Plaque de matriçage d'un moule de presse Download PDF

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Publication number
EP3645262B1
EP3645262B1 EP18735570.6A EP18735570A EP3645262B1 EP 3645262 B1 EP3645262 B1 EP 3645262B1 EP 18735570 A EP18735570 A EP 18735570A EP 3645262 B1 EP3645262 B1 EP 3645262B1
Authority
EP
European Patent Office
Prior art keywords
plane plate
axial direction
plane
radial direction
press
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.)
Active
Application number
EP18735570.6A
Other languages
German (de)
English (en)
Other versions
EP3645262A1 (fr
Inventor
Rainer Schmitt
Hasim Tekines
Robert Maassen
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.)
GKN Powder Metallurgy Engineering GmbH
Original Assignee
GKN Sinter Metals Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GKN Sinter Metals Engineering GmbH filed Critical GKN Sinter Metals Engineering GmbH
Publication of EP3645262A1 publication Critical patent/EP3645262A1/fr
Application granted granted Critical
Publication of EP3645262B1 publication Critical patent/EP3645262B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/027—Particular press methods or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B30B15/067—Press rams with means for equalizing the pressure exerted by a plurality of press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form

Definitions

  • the invention relates to a flat plate for a press tool of a press, in particular a powder press for producing green compacts.
  • the invention further relates to the use of a flat plate in a press tool of a press for producing a green compact.
  • the press is used in particular to produce sinterable green compacts, i.e. green compacts that can be sintered after the pressing process.
  • metallic and/or ceramic powders can be pressed into green compacts in the press.
  • Known presses of this type comprise at least one die, an upper press tool comprising one or more upper punches and a lower press tool comprising one or more lower punches.
  • An inner peripheral surface of the die forms the receptacle for the powder or the green compact to be produced.
  • at least one upper punch of the upper press tool can move into the die along an axial direction via a first face of the die that is open at the top.
  • the at least one upper punch slides along the inner peripheral surface of the die and increasingly presses the powder.
  • at least one lower punch can also be provided, which moves into the die along the axial direction via a second face of the die that is open at the bottom, or moves in the die between an upper position and a lower position.
  • the powder is thus pressed into a green compact between the at least one upper punch and the at least one lower punch, wherein the inner peripheral surface of the die defines in particular a lateral contour of the green compact.
  • one or each press tool comprises a plurality of punches, wherein at least one punch is arranged opposite the at least one further Stamp can be moved along the axial direction to press the powder.
  • Each stamp (and each component of the press tool connected to this stamp to transmit the pressing force) can be assigned to a tool level.
  • a level plate also called a tool level plate
  • the level plate can be guided by at least one guide column that extends along the axial direction.
  • the at least one guide column reduces or prevents rotation of the level plate in a circumferential direction and/or tilting of the level plate about an axis running along a radial direction.
  • the various level plates of at least one upper or one lower press tool can be guided together by guide columns.
  • a punch holder can also be arranged, which transfers a pressing force transmitted by the plane plates to the at least one punch.
  • pressure plates can be provided between the punch or punch holder and the plane plate, which transfer a pressing force of the plane plate in the axial direction and in the radial direction towards the punches.
  • Punches or punch holders can be attached to the pressure plate or to the plane plate via clamping plates (alternatively), bayonet locks or bowl-shaped receptacles.
  • the individual level plates which are characterized by a guide through at least one guide column and a connection to the at least one lifting cylinder, are spaced apart from one another in the axial direction and arranged one above the other, ie they are permanently arranged at different heights (levels) along the axial direction.
  • the plane plate can be cubic, cuboid or disc-shaped.
  • the plane plate extends between a centrally arranged holder for the pressure plate, the stamp holder or the stamp along the radial direction at least as far as a cylindrical guide surface which is intended for contacting one of the guide columns.
  • a press is, for example, from the US$5,498,147 known.
  • the plane plates shown there are rectangular in cross-section and have a constant wall thickness.
  • the plane plate is perforated in some areas so that a pressure piston of the lifting cylinder or a pressure plate for connection to the stamp can be accommodated on the plane plate.
  • the cross-sectional changes are not in the area between the guide surfaces on the guide columns and the central holder for the pressure plate and are also not continuous along an extension but are only provided in one position, namely on the holder for the pressure plate, with the cross-sectional changes regularly being formed by side walls running parallel to the axial direction.
  • the structure of a known press or press tool has a large overall height in the axial direction.
  • the individual components of the relevant tool level i.e. punch, possibly associated punch holder, possibly associated pressure plate
  • the elasticity of the tool level refers in particular to the deformation of the components of the tool level in the axial direction as a result of a pressing force acting on the connection by the lifting cylinders or on the holder by the punch or punch holder.
  • the unit of elasticity is: m/N [meter/Newton].
  • demolding of the green compact to be produced can be problematic due to the different expansion of the components between different tool levels when the tool levels are relaxed (pressing force is reduced), which can lead to cracks forming in the green compact.
  • the object of the present invention is to at least partially alleviate or even solve the problems described with reference to the prior art.
  • the differences in elasticity should at least be reduced, whereby the press tools can also be manufactured or provided with a lower overall height.
  • the weight of at least the level plates should be reduced if possible. This makes assembly of the press or the level plate easier and, if necessary, faster. In particular, more compact presses with a lower overall height can also be used, so that material and costs can be saved here too.
  • a flat plate for a press tool contributes to this, in particular a powder press for producing green compacts.
  • the press is used in particular to produce sinterable green compacts, i.e. green compacts that can be sintered after the pressing process.
  • metallic and/or ceramic powders can be pressed into green compacts in the press.
  • the plane plate can be designed in one piece.
  • the plane plate according to the invention is moved along an axial direction via at least one lifting cylinder to actuate a punch of the press.
  • the plane plate has a connection for the at least one lifting cylinder, at least one at least partially cylindrical guide surface parallel to the axial direction for contacting a guide column and a centrally arranged receptacle for contacting the punch or the punch holder of the press.
  • the plane plate has at least a first cross section that runs parallel to the axial direction and along a radial direction perpendicular to the axial direction between the receptacle and the guide surface.
  • first cross section at least a first region with a wall thickness and a first center line is provided, wherein the first center line runs at least partially at a first angle of at least 10 degrees, in particular at least 20, preferably at least 45, and at most 85 degrees, preferably at most 80 degrees, to the radial direction.
  • the plane plate according to the invention is further characterized in that the plane plate has an upper side pointing in a first axial direction and a lower side pointing in a second axial direction opposite to the first axial direction, wherein the upper side and the lower side of the plane plate are in the first region of the first cross-section run parallel to the first center line and/or at a first angle of at least 10 degrees, preferably at least 20 degrees, particularly preferably at least 45 degrees, and at a first angle of at most 85 degrees, in particular at most 80 degrees, to the radial direction.
  • lifting cylinders can be used to move the plane plate, whereby the plane plate then has a connection for each lifting cylinder.
  • the at least one lifting cylinder can be arranged opposite the plane plate in such a way that the plane plate is subjected to as little torque as possible around an axis parallel to the radial direction, which could cause the plane plate to tilt around this axis.
  • two lifting cylinders are provided, for example, which are arranged offset from one another by 180 degrees along the circumferential direction.
  • the plane plate can have a plurality of (preferably four) at least partially cylindrical guide surfaces that are arranged at a distance from one another in a direction perpendicular to the axial direction.
  • the plane plate can be guided along the axial direction by the at least one guide surface through the at least one guide column that extends along the axial direction.
  • the at least one guide column reduces or prevents rotation of the plane plate in a circumferential direction and/or tilting of the plane plate about an axis running along a radial direction.
  • the plane plates of at least one upper or lower press tool can be guided by common guide columns.
  • the receptacle for contacting the punch or a punch holder of the press is arranged centrally, i.e. (approximately) in the middle of the plane plate when viewed along the axial direction.
  • a central arrangement of the receptacle is present in particular when it is positioned centrally between or at the same distance from several connections, i.e. in particular centrally with respect to the force introduction points of the lifting cylinders.
  • the receptacle can be arranged (centrally) between a plurality of lifting cylinders and a plurality of guide columns, so that the plane plate is held in place by the smallest possible force when a pressing force is applied to the plane plate. Torque is applied about an axis parallel to the radial direction, which could cause the plane plate to tilt about this axis.
  • the receptacle can be round, preferably circular.
  • the receptacle can have a longitudinal axis that runs parallel to the axial direction and/or is arranged concentrically to the receptacle.
  • the radial direction extends perpendicular to the axial direction and in particular in each case starting from the longitudinal axis.
  • the holder can have a mounting surface for contacting and/or supporting the stamp or stamp holder.
  • the stamp or stamp holder can be attached to the holder using a clamping plate, a screw connection, a bayonet lock or similar.
  • the plane plate can have a connection for the at least one lifting cylinder, a centrally arranged receptacle for contacting the punch or a punch holder of the press and at least one first, at least partially cylindrical guide surface parallel to the axial direction for contacting a first guide column and a second, at least partially cylindrical guide surface parallel to the axial direction for contacting a second guide column.
  • the first guide surface can have a first lower end and the second guide surface can have a second lower end. The first lower end and the second lower end can be arranged at different heights from one another with respect to the axial direction and thus spaced apart from one another in the axial direction.
  • the plane plate can have four (or more) at least partially cylindrical guide surfaces for contacting four guide columns (i.e. one guide column each), each guide surface having a lower end.
  • the lower ends of each (or at least two) guide surfaces can be arranged at a common height.
  • each of the two at least partially cylindrical first guide surfaces forms a first lower end and each of the two at least partially cylindrical second guide surfaces forms a second lower end.
  • the first lower end and the second lower end can be arranged at different heights from one another with respect to the axial direction.
  • the first lower end and the second lower end may be located on a bottom surface of the plane plate.
  • the guide surfaces can be arranged at different heights. This means that tilting of the plane plate about an axis perpendicular to the axial direction can be reduced or completely prevented compared to a plane plate with guide surfaces arranged exclusively at a common height.
  • the two guide surfaces with the lower ends arranged at the common height can be arranged offset from each other by 90 or 180 degrees in a circumferential direction.
  • all lower ends of the guide surfaces of one plane plate can be arranged at different heights from one another with respect to the axial direction.
  • the lower ends of the guide surfaces of a plane plate which are arranged at different heights with respect to the axial direction, are spaced apart from one another by at least 5 millimeters, in particular at least 20 millimeters, preferably at least 100 millimeters, particularly preferably at least 200 millimeters along the axial direction.
  • the first guide surface on the upper side of the plane plate has a first upper end, wherein the first lower end and the first upper end are arranged at different heights from one another with respect to the axial direction and thus spaced apart from one another in the axial direction.
  • the first lower end and the second lower end are spaced apart from each other in the axial direction by at least 50% of the distance, preferably by at least 100% of the distance, particularly preferably by at least 150% of the distance.
  • the wall thickness refers to the material thickness of the plane plate parallel to the axial direction.
  • the center line runs through the geometric centroids of the cut surfaces of the plane plate located in the first cross section.
  • the first center line can be defined by the centers of the wall thickness present at the respective radial position.
  • known plane plates In the axial direction, known plane plates have a substantially constant wall thickness.
  • the plane plates In a cross section that runs parallel to the axial direction and along a radial direction perpendicular to the axial direction between the receptacle and the guide surface, the plane plates are in particular rectangular with a substantially constant wall thickness, with an upper side of the plane plate and a lower side of the plane plate and thus also a center line of the wall thickness extending parallel to the radial direction.
  • the US$5,498,147 The plane plates shown are rectangular in cross-section and have a constant wall thickness. The plane plate is perforated in some areas so that a pressure piston of the lifting cylinder or a pressure plate for connection to the stamp can be accommodated on the plane plate.
  • the cross-sectional changes or changes in wall thickness do not occur in the area between the guide surfaces on the guide columns and the central holder for the pressure plate, but are only provided in one position, namely on the holder for the pressure plate, with the cross-sectional changes usually being formed by side walls running parallel to the axial direction.
  • this known teaching is deviated from.
  • the first region can extend in the radial direction over a first extent which is at least 10%, in particular at least 20%, preferably 30%, of a smallest distance between the central receptacle and the guide surface (or between the receptacle and a position along the radial direction at which the at least one guide surface is arranged) in the first cross section along the radial direction.
  • the first extent can be at least 5 millimeters, at least 10 millimeters or at least 20 millimeters.
  • the holder can comprise a holder surface or a functional area (hereinafter also referred to as parts of the holder) on the plane plate on which the punch or a punch holder can be arranged.
  • the smallest distance can be determined between the guide surface and a part of the holder arranged closest to the guide surface along the radial direction.
  • the plane plate can have at least one second region with a wall thickness and a second center line in at least one second cross section, which runs along the radial direction between the receptacle and the guide surface (or between the receptacle and a position along the radial direction at which the at least one guide surface is arranged) and is arranged rotated in the circumferential direction by an angular range (e.g. by at least 1 angular degree or at least 5 angular degrees) relative to the first cross section.
  • the second region extends in the radial direction over a second extent that differs from the first extent (is larger or smaller).
  • the second center line runs at a second angle of at least 10 angular degrees, in particular at least 20, preferably at least 45 to the radial direction.
  • the second center line runs at a second angle of at most 85 angular degrees, preferably at most 80 angular degrees.
  • a cross-section rotated by an angle range of 90 or 180 degrees in the circumferential direction with respect to the first cross-section can be designed to be identical to the first cross-section.
  • the second cross-section can run parallel to the axial direction and along the radial direction, i.e. rotated only in one circumferential direction compared to the first cross-section.
  • the first angle differs from the second angle by at least 10 degrees, in particular by at least 20 degrees.
  • the plane plate can have a third region in the first cross section (or also in the second cross section) which adjoins the first region in the radial direction, wherein the third region has a third center line which runs at least partially at a third angle of at least 10 degrees, in particular at least 20 degrees, and at a third angle of at most 85 degrees to the radial direction.
  • the first angle (or the second angle) and the third angle are oriented in opposite directions to the radial direction. The statements regarding the first center line apply accordingly to the third center line.
  • the upper side and/or the lower side of the plane plate can run in the third region of the first cross section parallel to the third center line and/or at a third angle of at least 10 degrees, preferably at least 20 degrees, particularly preferably at least 45 degrees, and at a third angle of at most 80 degrees, in particular at most 85 degrees, to the radial direction.
  • the first cross section can extend through the guide surface.
  • the guide surface can have a lower end (on the underside of the plane plate) which is arranged at a height (level) with respect to the axial direction.
  • a turning area of the plane plate can be arranged between the first region and the third region. This turning area can be arranged below the lower end with respect to the axial direction.
  • a press tool for a press comprising at least a first plane plate and a second plane plate.
  • At least the first plane plate can be moved along an axial direction via at least one lifting cylinder to actuate a punch of the press.
  • At least the first plane plate has a connection for the at least one lifting cylinder.
  • Each plane plate has at least one at least partially cylindrical guide surface for contacting a guide column common to the plane plates and a centrally arranged receptacle for contacting the punch or a punch holder of the press.
  • the plane plates can be arranged one above the other along an axial direction, so that the at least one guide surface of each plane plate is arranged coaxially to one another.
  • At least the first plane plate is designed like a plane plate described above.
  • the plane plates can be arranged so as to at least partially overlap one another along the axial direction and along the radial direction. In particular, they can be arranged in relation to one another such that at least parts of the two plane plates are arranged at the same height relative to the axial direction (and thus adjacent to one another along the radial direction).
  • the plane plates can be arranged in a nested manner (and thus not only spaced apart in the axial direction) so that the overall height of the press tool can be reduced. Nested here means that the plane plates can be arranged one above the other in the axial direction and at least parts of the plane plates can be arranged next to each other in the radial direction.
  • the plane plates of the press tool can each have at least two at least partially cylindrical guide surfaces for contacting two guide columns common to the plane plates.
  • the first plane plate has a first at least partially cylindrical guide surface with a first lower end and the second plane plate has a third at least partially cylindrical guide surface with a third lower end.
  • the first plane plate is arranged above the second plane plate in relation to the axial direction.
  • the plane plates are arranged in relation to one another such that the first guide surface contacts a first guide column of the common guide columns and the third guide surface contacts a (different, i.e.) second guide column of the common guide columns.
  • the first lower end is arranged below the third lower end in relation to the axial direction.
  • the guide surfaces of a plane plate can be arranged at different heights, so that the guide surfaces of different plane plates on different guide columns in the axial direction can be arranged in an order that is reversed in relation to the plane plates.
  • a plane plate as described above in a press tool, in particular in a press tool as described above, a press for producing a green compact.
  • the press can be used in particular to produce sinterable green compacts, i.e. green compacts that can be sintered after the pressing process.
  • metallic and/or ceramic powders can be pressed into green compacts in the press.
  • the plane plate is a plane plate according to claim 1.
  • the shape of the plane plate can be created using the known manufacturing processes such as turning, milling, sawing, drilling, grinding, wire cutting, sinking EDM and hard milling etc.
  • the plane plate can be produced using so-called additive processes, e.g. laser sintering (3D printing process for the production of spatial structures from powdered starting material by sintering; workpiece is produced layer by layer). This allows a free design of the plane plate, whereby the weight of the plane plate can be reduced and the rigidity or elasticity of the plane plate can be specifically adjusted.
  • the stiffness of the plane plate refers in particular to the resistance of the plane plate to deformation in the axial direction in response to a pressing force exerted by the lifting cylinder on the connection or by the punch or punch holder on the holder.
  • the unit of stiffness is: N/m [Newton/meter].
  • the stiffness can be determined, for example, as follows: Using an FEM analysis, in which the deformation, in particular the elastic deformation, of the plane plate is determined at a certain pressing force [N], which acts on the plane plate in particular in the axial direction (i.e. the displacement of the material of the plane plate in the axial direction, which can be specified in [m]). The ratio of these values (pressing force [N]/material displacement [m]) represents the stiffness of the plane plate.
  • the elasticity or the rigidity of at least two plane plates, in particular of all plane plates (as described above), preferably differs from each other by a maximum of 20% or a maximum of 10%.
  • first primarily serve (only) to distinguish between several similar objects or sizes, and in particular do not necessarily specify a dependency and/or sequence of these objects or sizes in relation to one another. If a dependency and/or sequence is required, this is explicitly stated here or it is obvious to the expert when studying the specifically described design.
  • Fig.1 shows a press tool 2 of a press 3 in a perspective view, partly in section.
  • Fig.2 shows the press tool 2 after Fig.1 in a perspective view, in section II-II according to Fig. 3.
  • Fig. 3 shows the press tool 2 after Fig.1 and 2 in a view from above along the axial direction 5.
  • Fig.4 shows a side view of the press tool in section IV-IV according to Fig.3 .
  • Fig.5 shows the press tool 2 after Fig. 1 to 4 in a side view in a further section VV according to Fig.3 .
  • the Fig. 1 to 5 are described together below.
  • the press tool 2 comprises a plurality of plane plates 1, 33, two first plane plates 1 and two second plane plates 33, i.e. four, which are arranged one above the other along the axial direction 5.
  • Each of the four plane plates 1, 33 is, as in Fig.9 shown, displaced along the axial direction 5 by two lifting cylinders, a first lifting cylinder 4 and a second lifting cylinder 47.
  • Each level plate 1, 33 therefore has two connections, a first connection 34 for the first lifting cylinder 4 and a second connection 46 for the second lifting cylinder 47.
  • each level plate 1, 33 having four cylindrical guide surfaces, namely first guide surfaces 7 on the first guide column 8 and second guide surfaces 31 on the second guide column 37 (wherein the second level plate 33 has at least one third guide surface 35 on the second guide column 37) for contacting the guide columns 8, 37 common to the level plates 1, 33.
  • each level plate 1, 33 has a centrally arranged receptacle 9 for contacting the stamp 6 (see Fig.8 ) or a punch holder (here also symbolized by the punch 6) of the press 3.
  • the plane plates 1, 33 are arranged one above the other along an axial direction 5, so that the guide surfaces 7, 31, 35 of each plane plate 1, 33 are each arranged coaxially to the corresponding guide surfaces 7, 31, 35 of the other plane plates 1, 33.
  • the plane plates 1, 33 can be arranged at least partially overlapping each other along the axial direction 5 and along the radial direction 11, so that at least parts of the various plane plates 1, 33 are arranged at the same height 29 with respect to the axial direction 5 (and thus adjacent to each other along the radial direction 11).
  • the plane plates 1, 33 can be inserted into each other nested (and thus not exclusively spaced apart from one another in the axial direction 5) so that an overall height 48 of the press tool 2 can be reduced. Nested here means that the plane plates 1, 33 can be arranged one above the other along the axial direction 5 and next to one another in the radial direction 11 at least with parts of the different plane plates 1, 33.
  • the press tool 2 here further comprises a base plate 49 and a die receiving plate 50, between which the guide columns 8, 37 extend and the plane plates 1, 33 are arranged.
  • the plane plates 1, 33 of the press tool 2 each have four cylindrical guide surfaces 7, 31, 35 for contacting four guide columns 8, 37 common to the plane plates 1, 33.
  • a first plane plate 1 has a first guide surface 7 with a first lower end 28 and the second plane plate 33 has a third guide surface 35 with a third lower end 36.
  • the first plane plate 1 can be arranged above the second plane plate 33 with respect to the axial direction 5 and the plane plates 1, 33 can be arranged in relation to one another in such a way that the first guide surface 7 contacts a first guide column 8 of the common guide columns 8, 37 and the third guide surface 35 contacts a (different, i.e.) second guide column 37 of the common guide columns 8, 37.
  • the first lower end 28 is arranged below the third lower end 36 with respect to the axial direction 5 (see Fig.4 with the Fig.3 shown section IV-IV).
  • the guide surfaces 7, 31, 35 of a plane plate 1, 33 are to be arranged at different heights 29, so that the guide surfaces 7, 31, 35 of different plane plates 1, 33 on different guide columns 8, 37 in the axial direction 5 in a direction opposite the plane plates 1, 33 can be arranged in a reversed order.
  • This makes it possible to reduce or completely prevent tilting of the plane plate 1, 33 about an axis running perpendicular to the axial direction 5 compared to a plane plate 1, 33 with guide surfaces 7, 31, 35 arranged exclusively at a common height 29, and to realize a nested arrangement of the plane plates 1, 33, so that an overall lower construction height 48 of the press tool 2 is possible.
  • a method for operating a press 3 can be implemented, wherein the press 3 comprises at least one guide column 8, 37 and at least one lifting cylinder 4, 47 as well as a press tool 2 described above.
  • the press 3 and the press tool 2 are provided.
  • at least the first plane plate 1 and the second plane plate 33 are arranged in the press 3 (i.e. between the base plate 49 and the die receiving plate 50).
  • the plane plates 1, 33 are arranged one above the other along an axial direction 5 such that the at least one cylindrical guide surface 7, 31, 35 of each plane plate 1, 33 are arranged coaxially to one another.
  • the plane plates 1, 33 are arranged at least partially overlapping each other along the axial direction 5 and along the radial direction 11, so that at least parts of the two plane plates 1, 33 are arranged at the same height 29 relative to the axial direction 5 (and thus adjacent to each other along the radial direction 11).
  • level plates 1, 33 are made in one piece.
  • the plane plate 1 is connected via at least one lifting cylinder 4, 47 along an axial direction 5 for actuating a stamp 6 of the press 3.
  • the plane plate 1 has a connection 34, 46 for the at least one lifting cylinder 4, 47, at least one cylindrical guide surface 7, 31 parallel to the axial direction 5 for contacting a guide column 8, 37 and a centrally arranged receptacle 9 for contacting the punch 6 or a punch holder of the press 3.
  • the plane plate 1 has, in at least one first cross section 10 which runs parallel to the axial direction 5 and along a radial direction 11 perpendicular to the axial direction 5 between the receptacle 9 and the guide surface 7, at least one first region 12 in which a wall thickness 13 of the plane plate 1 changes continuously.
  • the illustrated plane plate 1 is actuated by two lifting cylinders 4, 47, whereby the plane plate 1 has a connection 34, 46 for each lifting cylinder 4, 47.
  • the lifting cylinder(s) 4, 47 is/are arranged in particular relative to the plane plate 1 in such a way that the plane plate 1 is subjected to the lowest possible torque about an axis parallel to the radial direction 11.
  • the plane plate 1 has four guide surfaces 7, 31, which are arranged at a distance from one another in a direction perpendicular to the axial direction 5.
  • the plane plate 1 can be guided along the axial direction 5 by the at least one guide surface 7, 31 through the at least one guide column 8, 37, which extends along the axial direction 5.
  • the at least one guide column 8, 37 reduces or prevents rotation of the plane plate 1 in a circumferential direction 18 and/or tilting of the plane plate 1 about a rotation axis/direction running along a radial direction 11.
  • the various plane plates 1, 33 of an upper or lower press tool 2 are guided by common guide columns 8, 37.
  • the receptacle 9 for contacting the punch 6 or a punch holder of the press 3 is arranged centrally, ie in a center of the plane plate 1 when viewed along the axial direction 5 (see Fig.3 ).
  • the holder 9 is arranged between a plurality of lifting cylinders 4, 47 and a plurality of guide columns 8, 37, so that when the plane plate 1 is subjected to a pressing force, the plane plate 1 is subjected to the lowest possible torque about an axis parallel to the radial direction 11.
  • the holder 9 is circular here and has a longitudinal axis running parallel to the axial direction 5 and arranged concentrically to the holder 9.
  • the radial direction 11 extends perpendicular to the axial direction 5 and in each case starting from the longitudinal axis.
  • the holder 9 has a receiving surface for contacting and supporting the stamp 6 or stamp holder.
  • the stamp 6 or the stamp holder can be attached to the holder 9 via a clamping plate, a screw connection, a bayonet lock or similar.
  • the plane plate has at least one first region 12 in which a wall thickness 13 of the plane plate 1 changes continuously in at least one first cross section 10, which runs parallel to the axial direction 5 and along a radial direction 11 perpendicular to the axial direction 5 between the receptacle 9 and the first guide surface 7.
  • the wall thickness 13 is determined in a direction parallel to the axial direction 5.
  • This wall thickness 13 changes continuously, ie at each adjacent position along the radial direction 11 the first region 12 has a different wall thickness 13.
  • the first region 12 extends in the radial direction 11 over a first extent 14 which is at least 10% of a smallest distance 15 between the receptacle 9 and the first guide surface 7 in the first cross section 10 along the radial direction 11.
  • the holder 9 comprises a holder surface or a functional area (hereinafter also referred to as parts of the holder 9) on the plane plate 1, on which the punch 6 or a punch holder can be arranged.
  • the smallest distance 15 is determined between the first guide surface 7 and a part of the holder 9 arranged closest to the guide surface 7 along the radial direction 11.
  • the plane plate 1 has in at least a second cross section 16 (see Fig.2 and 4 ), which runs along the radial direction 11 between the receptacle 9 and the second guide surface 31 and is arranged rotated relative to the first cross section 10 by an angular range 17 of here 90 degrees in a circumferential direction 18 (see Fig.3 ), at least one second region 19 in which the wall thickness 13 of the plane plate 1 changes continuously.
  • the second region 19 extends in the radial direction 11 over a second extent 20 which differs from the first extent 14 (in terms of amount).
  • the second region 19 has a wall thickness 13 and a second center line 23, wherein the second region 19 extends in the radial direction 11 over a second extension 20 in which the second center line 23 runs at a second angle 24 to the radial direction 11; wherein the second extension 20 differs from the first extension 14.
  • the second cross section 16 also runs parallel to the axial direction 5 and along a radial direction 11 perpendicular to the axial direction 5, i.e. rotated only in a circumferential direction 18 compared to the first cross section 10.
  • the wall thickness 13 clearly varies in the first region 12 and in the second region 19.
  • the first region 12 has a first center line 21 in the first cross section 10, wherein the first center line 21 runs at a first angle 22 to the radial direction 11.
  • the first center line 21 (and also the second center line 23) is formed by the centers of the wall thickness 13 present at the respective radial position.
  • the plane plate 1 has in the first cross section 10 (and in the second cross section 16) a third region 25 which adjoins the first region 12 (or the second region 19) in the radial direction 11, wherein the third region 25 has a third center line 26, wherein the third center line 26 runs at a third angle 27 to the radial direction 11, wherein the first angle 22 (or the second angle 24) and the third angle 27 are oriented in opposite directions to the radial direction 11.
  • the plane plate 1 has an upper side 39 pointing in a first axial direction 38 and a second axial side pointing in a direction opposite to the first axial direction 38.
  • the top side 39 and the bottom side 41 of the plane plate 1 run in the first region 12 of the first cross section 10 at a first angle 22 and in the third region 25 at a third angle 27 to the radial direction 11.
  • the first cross section 10 extends through the first guide surface 7 and the first guide surface 7 has a first lower end 28 (on the underside 41 of the plane plate 1) which is arranged at a height 29 with respect to the axial direction 5.
  • a turning region 30 of the plane plate 1 is arranged in the first cross section 10 (and in the second cross section 16) between the first region 12 (or the second region 19) and the third region 25.
  • the turning region 30 arranged in the first cross section 10 between the first region 12 and the third region 25 is arranged below the first lower end 28 with respect to the axial direction 5.
  • the plane plate 1 has at least two cylindrical guide surfaces 7, 31 for contacting a guide column 8, 37, respectively, wherein a cylindrical first guide surface 7 has a first lower end 28 and a cylindrical second guide surface 31 has a second lower end 32, wherein the first lower end 28 and the second lower end 32 are arranged at different heights 29 from one another with respect to the axial direction 5.
  • the lower ends i.e. the first lower end 28 and the second lower end 32, are arranged on a bottom side 41 of the plane plate 1.
  • the lower ends 28, 32 of two cylindrical guide surfaces 7, 31 of a plane plate 1 are arranged at a common height 29 (see Fig.2 ).
  • the lower ends 28, 32 arranged at a height 29 are offset from one another by 180 degrees in a circumferential direction 18.
  • the plane plate 1 has at least two cylindrical guide surfaces 7, 31 for contacting a guide column 8, 37, wherein a first cylindrical guide surface 7 has a first lower end 28 and a first upper end 43 and a second cylindrical guide surface 31 has a second lower end 32 and a second upper end 45, wherein the first lower end 28 is arranged at a different height 29 relative to the axial direction 5 below the second lower end 32 and wherein the first upper end 43 is arranged at a different height 29 relative to the axial direction 5 below the second upper end 45 (see Fig.4 ).
  • connection 34 on the upper side 39 has an upper connection surface 44.
  • the first upper end 43 and the upper connection surface 44 are arranged at different heights 29 from each other with respect to the axial direction 5 and thus spaced apart from each other in the axial direction 5 (see Fig.4 ).
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 at a height 29 which is different from the axial direction 5 (see Fig.4 ).
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second lower end 32 at a height 29 which is different from the axial direction 5 (see Fig.4 ).
  • the (first) plane plate 1 in at least a first cross section 10, which is parallel to the axial direction 5 and along a direction perpendicular to the axial direction 5 radial direction 11 between the first connection 34 and the receptacle 9 (and between the second connection 46 and the receptacle 9), has at least a first region 12 with a wall thickness 13, wherein the wall thickness 13 has a minimum 42 in the first region 12 and at a distance from the receptacle 9 and from the first connection 34 (or from the second connection 46).
  • the plane plate 1 is contacted via two lifting cylinders 4, 47 and can be moved along an axial direction 5 to actuate a punch 6 of the press 3.
  • the plane plate 1 has a first connection 34 for a first lifting cylinder 4 and a second connection 46 for a second lifting cylinder 47.
  • the connections 34, 46 are arranged at a common height 29 with respect to the axial direction 5.
  • the minimum 42 is designed as an opening which connects an upper side 39 pointing in a first axial direction 38 and a lower side 41 of the plane plate 1 pointing in a second axial direction 40 opposite to the first axial direction 38.
  • the wall thickness 13 changes continuously in the first region 12 at least between the receptacle 9 and the minimum 42.
  • At least the first region 12 has a first center line 21 in the first cross section 10, wherein the first center line 21 runs at a first angle 22 to the radial direction 11.
  • the first plane plate 1 has an upper side 39 pointing in a first axial direction 38 and a lower side 41 pointing in a second axial direction 40 opposite to the first axial direction 38, wherein the at least one Guide surface 7, 31 has an upper end 43 on the upper side 39; the connection 34 has an upper connection surface 44 on the upper side 39.
  • the upper end 43 and the upper connection surface 44 are arranged at different heights 29 from each other with respect to the axial direction 5 and thus spaced apart from each other in the axial direction 5 (see Fig.4 ).
  • the Fig.6 shows a plane plate 1 of the press tool 2 after Fig. 1 to 5 in a perspective view.
  • the Fig.7 shows the first level plate 1 after Fig.6 in another perspective view.
  • the Fig.8 shows the first level plate 1 after Fig. 6 and 7 in a side view in section VIII-VIII according to Fig.9 .
  • the Fig.9 shows the first level plate 1 after Fig. 6 to 8 in a top view along the axial direction 5.
  • the Fig. 6 to 9 are described together below. Please refer to the comments on Fig. 1 to 5 reference is made.
  • the illustrated level plate 1 is actuated by two lifting cylinders 4, 47, whereby the first level plate 1 has a connection 34, 46 for each lifting cylinder 4, 47.
  • the lifting cylinders 4, 47 are arranged opposite the first level plate 1 in such a way that the first level plate 1 is subjected to the lowest possible torque about an axis parallel to the radial direction 11.
  • the first plane plate 1 has four guide surfaces 7, 31, which are arranged at a distance from one another in a direction perpendicular to the axial direction 5. Via the one guide surface 7, 31, the first plane plate 1 can be guided along the axial direction 5 by the at least one guide column 8, 37, which extends along the axial direction 5. Via the at least one guide column 8, 37, a rotation of the first plane plate 1 in a circumferential direction 18 and/or a tilting of the plane plate 1 by an angle along an axis/direction running in a radial direction 11 is reduced or prevented.
  • the receptacle 9 for contacting the punch 6 or a punch holder of the press 3 is arranged centrally, ie in a center of the first plane plate 1 when viewed along the axial direction 5 (see Fig.9 ).
  • the holder 9 is therefore arranged between a plurality of lifting cylinders 4, 47 and a plurality of guide columns 8, 37, so that when the first level plate 1 is subjected to a pressing force (along the axial direction 5), the first level plate 1 is subjected to the lowest possible torque about an axis parallel to the radial direction 11.
  • the holder 9 is circular here and has a longitudinal axis running parallel to the axial direction 5 and arranged concentrically to the holder 9.
  • the radial direction 11 extends perpendicular to the axial direction 5 and in each case starting from the longitudinal axis.
  • the holder 9 has a support surface for contacting and supporting the stamp 6 or the stamp holder.
  • the stamp 6 or the stamp holder can be attached to the holder 9 via a clamping plate, a screw connection, a bayonet lock or similar (see Fig.7 ).
  • the first plane plate 1 has at least four cylindrical guide surfaces 7, 31 for contacting a guide column 8, 37 in each case, wherein a cylindrical first guide surface 7 has a first lower end 28 and a cylindrical second guide surface 31 has a second lower end 32, wherein the first lower end 28 and the second lower end 32 are arranged at different heights 29 from one another with respect to the axial direction 5.
  • the lower ends 28, 32 are arranged on a bottom side 41 of the first plane plate 1.
  • the lower ends 28, 32 of two cylindrical guide surfaces 7, 31 of a first plane plate 1 are arranged at a common height 29.
  • the two cylindrical guide surfaces 7, 31 with the lower ends 28, 32 arranged at the common height 29 are arranged offset from one another by 180 angular degrees in a circumferential direction 18.
  • the first plane plate 1 has at least two cylindrical guide surfaces 7, 31 for contacting a guide column 8, 37 in each case, wherein a first cylindrical guide surface 7 has a first lower end 28 and a first upper end 43 and a second cylindrical guide surface 31 has a second lower end 32 and a second upper end 45, wherein the first lower end 28 is arranged at a different height 29 relative to the axial direction 5 below the second lower end 32 and wherein the first upper end 43 is arranged at a different height 29 relative to the axial direction 5 below the second upper end 45.
  • the first guide surface 7 has a first upper end 43 on the upper side 39 of the plane plate 1, wherein the first lower end 28 and the first upper end 43 are arranged at different heights 29 from one another with respect to the axial direction 5 and are thus spaced apart from one another in the axial direction 5.
  • the first lower end 28 and the second lower end 32 are spaced apart from one another in the axial direction 5 by approximately 250% of the distance.
  • connection 34 on the upper side 39 has an upper connection surface 44.
  • the first upper end 43 and the upper connection surface 44 are arranged at different heights 29 from one another with respect to the axial direction 5 and are thus spaced apart from one another in the axial direction 5.
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 at a height 29 that is different from the axial direction 5.
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second lower end 32 at a height 29 that is different from the axial direction 5.
  • Fig.10 shows a known press tool 2 in a side view in section.
  • the press tool 2 is an adapter lower part 53 of an adapter 51 of a press 3 (see Fig. 11 and 12 )
  • the press tool 2 comprises four level plates 1, which are arranged one above the other along the axial direction 5.
  • Each of the four level plates 1 is displaced along the axial direction 5 by two lifting cylinders 4.
  • Each level plate 1 therefore has two connections 34.
  • four guide columns 8 are provided, with each level plate 1 having four cylindrical guide surfaces 7 on the guide column 8 for contacting the guide columns 8 common to the level plates 1.
  • each level plate 1 has a centrally arranged receptacle 9 for contacting the punch 6 (cf.
  • the plane plates 1 are arranged one above the other along an axial direction 5, so that the guide surfaces 7 of each plane plate 1 are each arranged coaxially to the corresponding guide surfaces 7 of the other plane plates 1.
  • the press tool 2 here further comprises a base plate 49 and a die receiving plate 50, between which the guide columns 8 extend and the plane plates 1 are arranged.
  • the individual plane plates 1 are spaced apart from one another in the axial direction 5 and arranged one above the other, i.e. they are permanently arranged at different heights 29 (levels) along the axial direction 5.
  • the plane plate 1 extends between the centrally arranged receptacle 9 for the punch holder or the punch 6 along the radial direction 1 at least as far as a cylindrical guide surface 7, which is provided for contacting one of the guide columns 8.
  • the plane plates 1 are rectangular in shape in the cross-section shown and have a constant wall thickness 13.
  • the receptacle 9 is cylindrical here and extends from the plane plate 1 along the axial direction 5.
  • the receptacles 9 of the lower plane plates 1 are each longer than the receptacle 1 of the adjacent plane plate 1.
  • the change in cross-section is not in the area between the guide surfaces 7 on the guide columns 8 and the central receptacle 9 and also does not run continuously along an extension but is only provided at one specific position, namely on the receptacle 9.
  • the change in cross-section is formed in each case by side walls running parallel to the axial direction 5.
  • Fig. 11 shows a known adapter 51 for a press 3 in a side view in section.
  • the adapter 51 comprises an adapter upper part 52 and an adapter lower part 53 (similar to the adapter lower part 53 according to Fig.10 ) with level plates 1, base plate 49 and die holder plate 50. Please refer to the explanations for Fig.10 reference is made.
  • Fig. 12 shows a known press frame 54 for receiving an adapter 51, e.g. the adapter 51 according to Fig. 11
  • the adapter 51 is supported on the press frame 54.
  • Press frame 54 and adapter 51 with the above-mentioned components form a press 3.
  • the press frame 54 has two couplings 55 for receiving the adapter 51.
  • the structure of the known press 3 or the press tool 2 (i.e. at least the adapter lower part 53) according to the Fig. 10 to 12 has a large overall height 48 in the axial direction 5.
  • the individual components of the relevant tool level i.e. punch 6, possibly associated punch holder, mount 9) extend along the axial direction 5 to different distances, so that different elasticities are present for each tool level.
  • demolding the green compact to be produced can be problematic due to the different expansion of the components between different tool levels when the tool levels are relaxed (pressing force is reduced), which can cause cracks to form in the green compact.
  • Fig. 13 shows a further embodiment of a press tool 2 of a press 3 in a perspective view, partly in section.
  • Fig. 14 shows the press tool 2 after Fig. 13 in a view from above along the axial direction 5.
  • Fig. 14 shows courses of the section lines XV-XV and XVI-XVI are shown.
  • Fig. 15 shows a side view of the press tool 2 after Fig. 13 and 14 in section XV-XV according to Fig. 14 .
  • Fig. 16 shows the press tool 2 after Fig. 13 to 15 in a side view in another section XVI-XVI according to Fig. 14 .
  • the Fig. 13 to 16 are described together below. Please refer to the explanations on the Fig. 1 to 5 reference is made.
  • the press tool 2 here has eight (8) guide columns 8, 37, namely four (4) first guide columns 8 and four (4) second guide columns 37.
  • the guide columns 8, 37 each extend from the base plate 49 to the die receiving plate 50.
  • each level plate 1, 33 has two (2) lifting cylinders 4, 47.
  • Each lifting cylinder 4, 47 extends through the base plate 49 along the axial direction 5 to a connection 34, 46 on the level plate 1, 33. It can be seen that the connections 34, 46 of the lifting cylinders 4, 47 on a level plate are each arranged at the same height 29.
  • the plane plates 1, 33 of the press tool 2 each have eight cylindrical guide surfaces 7, 31, 35 for contacting eight guide columns 8, 37 common to the plane plates 1, 33.
  • a first plane plate 1 has a first guide surface 7 with a first lower end 28 and the second plane plate 33 has a third guide surface 35 with a third lower end 36.
  • the first plane plate 1 can be arranged above the second plane plate 33 with respect to the axial direction 5 and the plane plates 1, 33 can be arranged in relation to one another in such a way that the first guide surface 7 contacts a first guide column 8 of the common guide columns 8, 37 and the third guide surface 35 contacts a (different, i.e.) second guide column 37 of the common guide columns 8, 37.
  • the first lower end 28 is arranged below the third lower end 36 with respect to the axial direction 5 (see Fig. 15 and 16 ).
  • Fig. 17 shows a plane plate 1 of the press tool 2 after Fig. 13 to 16 in a perspective view.
  • Fig. 18 shows the level plate 1 after Fig. 17 in a view from above along the axial direction 5.
  • Fig. 19 shows the level plate 1 after Figs. 17 and 18 in a side view.
  • Fig. 20 shows the level plate 1 after Fig. 17 to 19 in a side view in section XX-XX according to Fig. 18.
  • Fig. 21 shows the level plate 1 after Fig. 17 to 20 in a side view in section XXI-XXI according to Fig. 18 .
  • the Fig. 17 to 21 are described together below. Please refer to the explanations on the Fig. 13 to 16 and 6 to 9 are referred to.
  • the illustrated level plate 1 is actuated via two lifting cylinders 4, 47, whereby the first level plate 1 has a connection 34, 46 for each lifting cylinder 4, 47.
  • the plane plate 1 has eight cylindrical guide surfaces 7, 31, each guide surface 7, 31 contacting a guide column 8, 37, a cylindrical first guide surface 7 having a first lower end 28 and a cylindrical second guide surface 31 having a second lower end 32 (see Fig. 21 ), wherein the first lower end 28 and the second lower end 32 are arranged at different heights 29 with respect to the axial direction 5.
  • the lower ends 28, 32 are arranged on an underside 41 of the plane plate 1.
  • all four (4) first lower ends 28 of the first guide surfaces 7 are each arranged at a common height.
  • all four (4) second lower ends 32 of the second guide surfaces are each arranged at a common height.
  • the first cylindrical guide surfaces 7 with the first lower ends 28 arranged at the common height 29 are arranged offset from one another by 90 angular degrees in a circumferential direction 18 (the second guide surfaces 31 likewise; and offset from the first guide surfaces 7 by 45 angular degrees in a circumferential direction 18).
  • the first plane plate 1 has eight cylindrical guide surfaces 7, 31, with first guide surfaces 7 contacting first guide columns 8 and second guide surfaces 31 contacting second guide columns 37.
  • First cylindrical guide surfaces 7 each have a first lower end 28 and a first upper end 43, with second cylindrical guide surfaces 31 each having a second lower end 32 and a second upper end 45.
  • the first lower end 28 is arranged at a different height 29 relative to the axial direction 5 below the second lower end 32.
  • the first upper end 43 is arranged at a different height 29 relative to the axial direction 5 below the second upper end 45.
  • the first connection 34 and the second connection 46 have an upper connection surface 44 on the upper side 39.
  • the first upper end 43 and the upper connection surface 44 are arranged at different heights 29 from one another with respect to the axial direction 5 and are thus spaced apart from one another in the axial direction 5.
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 at a height 29 that is different from the axial direction 5.
  • the upper connection surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second lower end 32 at a height 29 that is different from the axial direction 5.
  • the plane plate 1 has in at least a first cross section 10 (e.g. shown in Fig. 20 ), which runs parallel to the axial direction 5 and along a radial direction 11 perpendicular to the axial direction 5 between the receptacle 9 and the first guide surface 7, at least one first region 12, in which a wall thickness 13 of the plane plate 1 changes continuously.
  • the wall thickness 13 is determined in a direction parallel to the axial direction 5.
  • This wall thickness 13 changes continuously, i.e. at each adjacent position along the radial direction 11, the first region 12 has a different wall thickness 13.
  • the first region 12 has a first center line 21 in the first cross section 10, wherein the first center line 21 runs at a first angle 22 to the radial direction 11.
  • the first center line 21 is formed by the centers of the wall thickness 13 present at the respective radial position.

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  • Manufacturing & Machinery (AREA)
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  • Press Drives And Press Lines (AREA)

Claims (9)

  1. Plaque plane (1) pour un outil de presse (2) d'une presse (3) ; la plaque plane (1) étant apte à être déplacée par au moins un vérin de levage (4) le long d'une direction axiale (5) pour l'actionnement d'un poinçon (6) de la presse (3) ; la plaque plane (1) présentant un moyen de liaison (34) pour ledit au moins un vérin de levage (4), au moins une surface de guidage (7, 31) au moins partiellement cylindrique, parallèle à la direction axiale (5), destinée à être mise au contact d'une colonne de guidage (8, 37) et un logement (9) agencé de manière centrale, destiné à être mis en contact du poinçon (6) ou d'un porte-poinçon de la presse (3) ; la plaque plane (1) présentant, dans au moins une première section transversale (10) qui s'étend parallèlement à la direction axiale (5) et le long d'une direction radiale (11) perpendiculaire à la direction axiale (5) entre le logement (9) et la surface de guidage (7, 31), au moins une première zone (12) ayant une épaisseur de paroi (13) et une première ligne médiane (21), la première ligne médiane (21) s'étendant au moins en partie selon un premier angle (22) d'au moins 10 degrés et d'au plus de 85 degrés par rapport à la direction radiale (11),
    caractérisé en ce que la plaque plane (1) présente une face supérieure (39) orientée dans une première direction axiale (38) et une face inférieure (41) orientée dans une deuxième direction axiale (40) opposée à la première direction axiale (38), la face supérieure (39) et la face inférieure (41) de la plaque plane (1) s'étendant dans la première zone (12) de la première section transversale (10) parallèlement à la première ligne centrale (21) et/ou selon un premier angle (22) d'au moins 10 degrés angulaires et selon un premier angle (22) d'au plus 85 degrés par rapport à la direction radiale.
  2. Plaque plane (1) selon la revendication 1, dans laquelle la première zone (12) s'étend dans la direction radiale (11) sur une première étendue (14) qui est au moins 10 % d'une distance minimale (15) entre le logement (9) et la surface de guidage (7) dans la première section transversale (10) le long de la direction radiale (11).
  3. Plaque plane (1) selon la revendication 2, dans laquelle la plaque plane (1) est agencée dans au moins une deuxième section transversale (16) qui s'étend le long de la direction radiale (11) entre le logement (9) et la surface de guidage (7, 31) et qui est tournée par rapport à la première section transversale (10) d'une zone angulaire (17) dans une direction circonférentielle (18), présente au moins une deuxième zone (19) ayant une épaisseur de paroi (13) et une deuxième ligne médiane (23), la deuxième zone (19) s'étendant dans la direction radiale (11) sur une deuxième extension (20), dans laquelle une deuxième ligne médiane (23) s'étend selon un deuxième angle (24) d'au moins 10 degrés par rapport à la direction radiale (11) ; la deuxième extension (20) étant différente de la première extension (14).
  4. Plaque plane (1) selon l'une des revendications précédentes, dans laquelle la plaque plane (1) présente, dans la première section transversale (10), une troisième zone (25) se raccordant à la première zone (12) dans la direction radiale (11), la troisième zone (25) présentant une troisième ligne médiane (26), la troisième ligne médiane (26) s'étendant selon un troisième angle (27) d'au moins 10 degrés par rapport à la direction radiale (11), le premier angle (22) et le troisième angle (27) étant orientés en sens inverse par rapport à la direction radiale (11).
  5. Plaque plane (1) selon la revendication 4, dans laquelle la première section transversale (10) s'étend à travers ladite au moins une surface de guidage (7, 31) et la surface de guidage (7, 31) présente une extrémité inférieure (28) qui est agencée à un niveau (29) opposé à la direction axiale (5), une zone de retournement (30) de la plaque plane (1) étant agencée dans la première section transversale (10) entre la première zone (12) et la troisième zone (25), cette zone de retournement (30) étant agencée au-dessous de l'extrémité inférieure (28) par rapport à la direction axiale (5).
  6. Plaque plane (1) selon l'une des revendications précédentes, la plaque plane (1) présentant au moins deux surfaces de guidage cylindriques (7, 31) destinées à être chacune mises au contact d'une colonne de guidage (8, 37), une première surface de guidage cylindrique (7) présentant une première extrémité inférieure (28) et une deuxième surface de guidage cylindrique (31) présentant une deuxième extrémité inférieure (32), la première extrémité inférieure (28) et la deuxième extrémité inférieure (32) étant agencées à des hauteurs (29) différentes l'une de l'autre par rapport à la direction axiale (5).
  7. Outil de presse (2) pour une presse (3), comprenant au moins une première plaque plane (1) et une deuxième plaque plane (33), au moins la première plaque plane (1) étant apte à être déplacée par au moins un vérin de levage (4) le long d'une direction axiale (5) pour l'actionnement d'un poinçon (6) de la presse (3) ; au moins la première plaque plane (1) présentant un moyen de liaison (34) pour ledit au moins un vérin de levage (4), chaque plaque plane (1, 33) présentant au moins une surface de guidage cylindrique (7, 31) respective destinée à être mise au contact d'une colonne de guidage (8, 37) commune aux plaques planes (1) et respectivement un logement (9) aménagé de manière centrale pour la mise en contact du poinçon (6) ou d'un porte-poinçon de la presse (3) ; les plaques planes (1, 33) sont aptes à être agencées les unes au-dessus des autres le long d'une direction axiale (5), de sorte que les au moins une surface de guidage (7, 31) de chaque plaque plane (1, 33) sont agencées de manière coaxiale les unes par rapport aux autres ; au moins la première plaque plane (1) étant une plaque plane (1) selon l'une des revendications précédentes ; les plaques planes (1, 33) sont aptes à être agencées le long de la direction axiale (5) et le long de la direction radiale (11) en se chevauchant au moins partiellement.
  8. Outil de presse (2) selon la revendication 7, dans lequel les plaques planes (1, 33) présentent chacune au moins deux surfaces de guidage cylindriques (7, 31) destinées à être mises au contact de deux colonnes de guidage (8, 37) communes aux plaques planes (1, 33) ; la première plaque plane (1) présente une première surface de guidage (7) avec une première extrémité inférieure (28) et la deuxième plaque plane (33) présente une troisième surface de guidage (35) avec une troisième extrémité inférieure (36), la première plaque plane (1) étant apte à être agencée au-dessus de la deuxième plaque plane (33) par rapport à la direction axiale (5) et les plaques planes (1, 33) étant aptes à être agencées l'une par rapport à l'autre de telle sorte que la première surface de guidage (7) entre en contact avec une première colonne de guidage (8) des colonnes de guidage communes (8, 37) et que la troisième surface de guidage (35) entre en contact avec une deuxième colonne de guidage (37) des colonnes de guidage communes (8, 37) ; la première extrémité inférieure (28) est alors agencée en dessous de la troisième extrémité inférieure (36) par rapport à la direction axiale (5).
  9. Utilisation d'une plaque plane (1) dans un outil de presse (2) d'une presse (3) pour la fabrication d'un produit vert ; la plaque plane (1) est apte à être déplacée par au moins un vérin de levage (4) le long d'une direction axiale (5) pour l'actionnement d'un poinçon (6) de la presse (3) ; la plaque plane (1) présente un moyen de liaison (34) pour ledit au moins un vérin de levage (4), au moins une surface de guidage (7, 31) au moins partiellement cylindrique parallèle à la direction axiale (5) destinée à être mise au contact d'une colonne de guidage (8, 37) et un logement (9) agencé de manière centrale destinée à être mis au contact du poinçon (6) ou du support de poinçon de la presse (3) ; la plaque plane (1) présentant, dans au moins une première section transversale (10) qui s'étend parallèlement à la direction axiale (5) et le long d'une direction radiale (11) perpendiculaire à la direction axiale (5) entre le logement (9) et la surface de guidage (7, 31), au moins une première zone (12) ayant une épaisseur de paroi (13) et une première ligne médiane (21), la première ligne médiane (21) s'étendant au moins partiellement selon un premier angle (22) d'au moins 10 degrés et au plus de 80 degrés par rapport à la direction radiale (11) ; caractérisée en ce que la plaque plane (1) présente une face supérieure (39) orientée dans une première direction axiale (38) et une face inférieure (41) orientée dans une deuxième direction axiale (40) opposée à la première direction axiale (38), la face supérieure (39) et la face inférieure (41) de la plaque plane (1) s'étendant dans la première zone (12) de la première section transversale (10) parallèlement à la première ligne médiane (21) et/ou selon un premier angle (22) d'au moins 10 degrés et selon un premier angle (22) d'au plus 85 degrés par rapport à la direction radiale.
EP18735570.6A 2017-06-29 2018-06-29 Plaque de matriçage d'un moule de presse Active EP3645262B1 (fr)

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DE102017114457.9A DE102017114457B4 (de) 2017-06-29 2017-06-29 Ebenenplatte eines Pressenwerkzeugs
PCT/EP2018/067688 WO2019002599A1 (fr) 2017-06-29 2018-06-29 Plaque de matriçage d'un moule de presse

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EP3645262B1 true EP3645262B1 (fr) 2024-04-10

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JP (1) JP7142039B2 (fr)
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DE102014003726A1 (de) * 2014-03-18 2015-09-24 Gkn Sinter Metals Engineering Gmbh Presse zum Herstellen maßhaltiger Grünlinge und Verfahren zum Herstellen

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JPH07115233B2 (ja) 1990-08-10 1995-12-13 株式会社ヨシツカ精機 粉末成形プレス
JPH05140609A (ja) 1991-02-08 1993-06-08 Keita Hirai 段付品汎用成型プレス
JPH0818158B2 (ja) * 1993-06-29 1996-02-28 株式会社ヨシツカ精機 粉末成形プレス
US6165400A (en) * 1996-05-09 2000-12-26 Stackpole Limited Compacted-powder opposed twin-helical gears and method
CN1147395C (zh) * 2001-02-28 2004-04-28 朱锦忠 粉末成型液压机
DE10254656B4 (de) * 2002-11-22 2005-10-13 Dorst Technologies Gmbh & Co. Kg Presseneinrichtung zum Herstellen maßhaltiger Presslinge mit zentraler Stempelabstützung
CN1218801C (zh) * 2003-07-15 2005-09-14 华南理工大学 多层模板粉末压制成形模架
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US20200206813A1 (en) 2020-07-02
DE102017114457B4 (de) 2019-08-08
DE102017114457A1 (de) 2019-01-03
JP2020525294A (ja) 2020-08-27
CN110997296A (zh) 2020-04-10
EP3645262A1 (fr) 2020-05-06
JP7142039B2 (ja) 2022-09-26
WO2019002599A1 (fr) 2019-01-03
US11465203B2 (en) 2022-10-11
CN110997296B (zh) 2023-06-16

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