EP3645259A1

EP3645259A1 - Plane plate of a pressing tool

Info

Publication number: EP3645259A1
Application number: EP18735308.1A
Authority: EP
Inventors: Rainer Schmitt; Hasim Tekines; Robert Maassen
Original assignee: GKN Sinter Metals Engineering GmbH
Current assignee: GKN Powder Metallurgy Engineering GmbH
Priority date: 2017-06-29
Filing date: 2018-06-29
Publication date: 2020-05-06
Anticipated expiration: 2038-06-29
Also published as: US20210354415A1; EP3645259B1; WO2019002593A1; US11479007B2; JP7074783B2; DE102017114455B3; CN110997297B; JP2020525296A; ES2969891T3; CN110997297A

Abstract

The invention relates to a plane plate (1) for a pressing tool (2) of a press (3), wherein: the plane plate (1) can be moved by means of at least one lifting cylinder (4) along an axial direction (5) in order to actuate a punch (6) of the press (3); the 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) opposing the first axial direction (38), a connection (34) for the at least one lifting cylinder (4), a centrally located receiving portion (9) for contacting the punch (6) or a punch holder of the press (3), and at least one first guide surface (7), which is parallel to the axial direction (5) and at least part of which is cylindrical, for contacting a first guide column (8), and a second guide surface (31), which is parallel to the axial direction (5) and at least part of which is cylindrical, for contacting a second guide column (37); on the lower side (41) of the plane plate (1), the first guide surface (7) has a first lower end (28) and the second guide surface (31) has a second lower end (32); and the first lower end (28) and the second lower end (32) are arranged at heights (29) which differ from one another with respect to the axial direction (5) and thus are spaced apart from one another in the axial direction (5).

Description

Plane plate of a press tool

The invention relates to a plane plate for a press tool of a press, in particular a powder press for the production of green compacts. The invention further relates to a use of a plane plate in a press tool of a press for producing a green compact. In particular, sinterable green compacts are produced by the press, ie green compacts which can be sintered after the pressing process. In particular, metallic and / or ceramic powders can be pressed into green compacts in the press.

Known presses of this type include at least one die, one or more top dies comprising an upper press tool, and a lower press tool comprising one or more dies. An inner peripheral surface of the die forms the receptacle for the powder or the green product to be produced. In particular, at least one upper punch of the upper press tool can travel into the die along an axial direction via an upwardly open first end face of the die. The at least one upper punch slides along the inner peripheral surface of the die and increasingly compresses the powder. In particular, at least one lower punch can additionally be provided, which moves into the die via a downwardly open second end face of the die along the axial direction, or moves in the die between an upper position and a lower position. Between the at least one upper punch and the at least one lower punch so the powder is pressed into a green compact, wherein the inner peripheral surface of the die defines in particular a lateral contour of the green body.

In particular, one or each press tool comprises a plurality of punches, wherein at least one punch opposite to the at least one further Stamp along the axial direction for pressing the powder is movable. Each stamp (and each associated with this stamp for transmitting the pressing force component of the press tool) can be assigned to a tool level. To process each (movable) punch is regularly a plane plate (also called tool edge plate) is provided, which is actuated by at least one lifting cylinder and / or moved by the lifting cylinder along the axial direction. The plane plate may be guided by at least one guide pillar extending along the axial direction. Via the at least one guide column, a rotation of the plane plate in a circumferential direction and / or a tilting of the plane plate about an axis extending along a radial direction is reduced or prevented. The various plane plates of at least one upper or one lower pressing tool can be guided together by guide columns.

Between the plane plate and the at least one stamp, which contacts the powder in the die, a punch holder can additionally be arranged which transmits a pressing force transmitted by the plane plates to the at least one stamp. Further, printing plates may be provided between the stamp holder and the plane plate, which transmit a pressing force of the plane plate in the axial direction and in the radial direction toward the punches. Stamps or punch holders can be fastened to the pressure plate or to the plane plate via clamping plates (alternatively), bayonet caps or cup-shaped receptacles.

In known press tools or presses, the individual plane plates, which are characterized by a guide by at least one guide column and a connection to the at least one lifting cylinder, spaced apart in the axial direction and arranged one above the other, ie they are permanently at different heights (levels) arranged along the axial direction. A Plane plate can be cubic, cuboid or disc-shaped. The plane plate extends between a centrally disposed receptacle for the pressure plate, the punch holder or the punch along the radial direction at least as far as a cylindrical guide surface which is provided for contacting one of the guide columns.

A press is z. B. from 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 broken in some areas, so that a pressure piston of the lifting cylinder or a pressure plate for connection to the stamp on the plane plate can be added. However, the cross-sectional changes are not in the area between the guide surfaces on the guide columns and the central receptacle for the printing plate and not continuously along an extension before but are provided only at one position, namely on the receptacle for the printing plate, the cross-sectional changes regularly be formed by parallel to the axial direction extending side walls.

The structure of a known press or a press tool has a large height in the axial direction. Here, starting from the die for each tool level, the individual components of the respective tool level (ie punch, possibly associated punch holder, possibly associated pressure plate) extend along the axial direction to different extents so that different elasticities are present for each tool level. The elasticity of the tool level denotes in particular the deformation of the components of the tool level in the axial direction as a result of a pressing force acting on the receptacle by the lifting cylinders on the connection or by the punch or punch holder. The unit of elasticity is: m / N [meter / Newton]. As a result of the different elasticities, demolding of the green compact to be produced by the different expansion of the components between different tool levels during the relaxation of the tool levels (pressing force is reduced) can be problematical, with cracks occurring in the green compact.

On this basis, it is an object of the present invention, at least partially alleviate or even solve the problems described with reference to the prior art. In particular, the differences in the elasticities should at least be reduced, wherein the press tools can also be produced or made available with a smaller overall height. Furthermore, if possible, the weight of at least the plane plates should be reduced. Thus, the installation of the press or the plane plate can be simplified and, if necessary, carried out faster. In particular, more compact presses can be used with a lower height, so that material and cost can be saved here.

To solve this problem, a plane plate according to the features of patent claim 1 and a use of a plane plate according to claim 13 is proposed. Advantageous developments are the subject of the dependent claims. The features listed individually in the claims can be combined in a technologically meaningful manner and can be supplemented by explanatory facts from the description and / or details of the figures, with further embodiments of the invention are shown.

This contributes to a plane plate for a press tool a press, in particular a powder press for the production of green compacts. With the press in particular sinterable green compacts are produced, ie green compacts, which after the Pressing process can be sintered. In particular, metallic and / or ceramic powders can be pressed into green compacts in the press.

In particular, the plane plate can be made in one piece.

The plane plate can be moved over at least one lifting cylinder along an axial direction for actuating a punch of the press. The planar plate has an upper side pointing in a first axial direction and a lower axial side facing in a first axial direction, 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 parallel to the axial direction first at least partially cylindrical guide surface for contacting a first guide column and a parallel to the axial direction second at least partially cylindrical guide surface for contacting a second guide column. At the bottom of the plane plate, the first guide surface has a first lower end and the second guide surface has a second lower end. The first lower end and the second lower end are arranged at different heights from one another in relation to the axial direction and thus spaced apart in the axial direction from one another.

Several lifting cylinders can be used to move the plane plate, with the plane plate then each having a connection for each lifting cylinder. The at least one lifting cylinder can be arranged opposite to the plane plate such that the plane plate is acted upon by a torque which is as low as possible about an axis parallel to the radial direction, which could cause tilting of the plane plate about this axis. In particular, so z. B. two lifting cylinders, which are arranged offset by 180 degrees along the circumferential direction to each other. The plane plate may include a plurality of (preferably four) at least partially cylindrical guide surfaces spaced apart in a direction perpendicular to the axial direction. Via the at least one guide surface, the plane plate can be guided along the axial direction through the at least one guide column, which extends along the axial direction. Via the at least one guide column, a rotation of the plane plate in a circumferential direction and / or a tilting of the plane plate about an axis extending along a radial direction is reduced or prevented. The plane plates of at least one upper or lower press tool can be guided by common guide columns.

The receptacle for contacting the stamp or a stamp holder of the press is arranged in particular centrally, d. H. (about) at a center 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 a plurality of connections, that is to say in particular centrally with respect to the force introduction points of the lifting cylinders. The receptacle can be (centrally) arranged between a plurality of lifting cylinders and a plurality of guide columns, so that the plane plate upon application of the plane plate with a pressing force by the lowest possible torque about an axis parallel to the radial direction, tilting the plane plate around could cause this axis is acted upon.

The receptacle can be round, preferably circular. The receptacle may have a longitudinal axis extending parallel to the axial direction and / or arranged concentrically for receiving. The radial direction extends perpendicular to the axial direction and in particular each starting from the longitudinal axis. The receptacle can have a receiving surface for contacting and / or for supporting the stamp or stamp holder. The punch or the punch holder can be attached to the receptacle via a clamping plate, a screw connection, a bayonet catch or the like.

The plane plate may have four (or more) at least partially cylindrical guide surfaces for contacting four guide columns (ie in each case one guide column), each guide surface having a lower end. The lower ends of each (or at least) two Führungsfiächen can be arranged at a common height.

In particular, each two Führungsfiächen are provided, the lower ends are arranged at a common height. In particular, each of the two at least partially cylindrical first Führungsfiächen thus forms a first lower end and each of the two at least partially cylindrical second Führungsfiächen from a second lower end. The first lower end and the second lower end may be disposed at different heights from each other with respect to the axial direction.

The first lower end and the second lower end may be disposed on an underside of the plane plate.

The Führungsfiächen can be arranged at different heights. In this way, tilting of the plane plate about an axis extending perpendicular to the axial direction relative to a plane plate with guiding surfaces arranged exclusively on a common height can be reduced or completely prevented. The two guide surfaces with the lower ends arranged at the common height can be arranged offset in a circumferential direction by 90 or by 180 angular degrees from each other. Preferably, all lower ends of the guide surfaces of a plane plate can be arranged on different heights from one another with respect to the axial direction.

In particular, the lower ends of a planar plate, which are arranged at different heights with respect to the axial direction, are spaced apart 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. In particular, 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 distances from each other in the axial direction and thus in the axial direction at a distance from each other. The first lower end and the second lower end are spaced apart in the axial direction by at least 50% of the distance, preferably by at least 100% of the distance, more preferably by at least 150% of the distance.

The plane plate may extend in at least a first cross-section which is parallel to the axial direction and along the radial direction between the receptacle and the guide surface (or between the receptacle and a position along the radial direction on which the at least one guide surface is arranged), have at least a first region with a wall thickness and a first center line (the wall thickness). The first area extends in the radia- len direction over a first extension, in which the first center line at a first angle of at least 10 degrees, in particular at least 20, preferably at least 45 runs to the radial direction. In particular, the first center line extends at a first angle of at most 85 degrees, preferably at most 80 degrees.

The wall thickness refers to the material thickness of the plane plate parallel to the axial direction. The center line passes through the geometric centroids of the lying in the first cross-sectional areas of the plane plate. The first centerline may be defined by the centers of the wall thickness present at the respective radial position.

In the axial direction, known plane plates have a substantially constant wall thickness. In a cross-section, which runs parallel to the axial direction and along a direction perpendicular to the axial direction radial direction between the receptacle and the guide surface, the plane plates are in particular rectangular designed with a substantially constant wall thickness, with a top of the plane plate and a bottom of the plane plate and thus also extend a center line of the wall thickness parallel to the radial direction. The plane plates shown in US Pat. No. 5,498,147 have a rectangular cross section and have a constant wall thickness. The plane plate is broken in some areas, so that a pressure piston of the lifting cylinder or a pressure plate for connection to the stamp on the plane plate can be added. However, the cross-sectional changes or changes in the wall thickness are not in the area between the Führungsfiächen on the guide columns and the central receptacle for the pressure plate but are provided only at one position, namely on the receptacle for the pressure plate, the cross-sectional changes regularly by parallel to Axial direction extending side walls are formed. In the present case, deviations from this known teaching will now be made.

The first region may extend in the radial direction over a first extent that 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 on which the at least one guide surface is arranged) in the first cross section along the radial direction. The first extension may be at least 5 millimeters, at least 10 millimeters or at least 20 millimeters.

The receptacle can comprise a receiving area or a functional area (also referred to below as parts of the receptacle) on the plane plate on which the stamp or a stamp holder can be arranged. The smallest distance can be determined between the guide surface and a, the guide surface along the radial direction closest to the part of the recording.

The plane plate may be in at least a second cross-section which extends 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 with respect to the first cross section an angular range (for example, by at least one angular degree or at least 5 angular degrees) is arranged rotated in the circumferential direction, have at least a second region having a wall thickness and a second center line. In this case, the second region extends in the radial direction over a second extension, which differs from the first extension (larger or smaller). In the second cross section, the second center line extends at a second angle of at least 10 degrees of angle, in particular at least 20, preferably at least 45 to the radial direction. In particular, the second center line extends at a second angle of at most 85 degrees, preferably at most 80 degrees. Optionally, only a cross-section arranged to be rotated through an angle range of 90 or 180 degrees in the circumferential direction with respect to the first cross section may be identical to the first cross section.

The second cross section may extend parallel to the axial direction and along the radial direction, that is to say rotated in one circumferential direction with respect to the first cross section.

In particular, the first angle differs from the second angle by at least 10 degrees of angle, in particular by at least 20 degrees of angle.

The planar plate may have a third region adjoining the first region in the radial direction in the first cross-section (or also in the second cross-section), the third region having a third centerline that is at least partially at a third angle of at least 10 Angular degree, in particular at least 20 angular 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 opposite to the radial direction in opposite directions. The remarks on the first midline apply accordingly to the third midline.

The plane plate may have an upper side pointing in a first axial direction and a lower side facing in a first axial direction opposite second axial direction. The top and / or bottom of the plane plate may be parallel to the first in the first region of the first cross section Center line and / or at a first angle of at least 10 degrees, preferably at least 20 degrees, more preferably at least 45 degrees, and at a first angle of at most 80 degrees, in particular at most 85 degrees to the radial direction.

The top and / or bottom of the plane plate may be parallel to the third centerline and / or at a third angle of at least 10 degrees, preferably at least 20 degrees, more preferably at least 45 degrees, and at a third angle of at most 80 angular degrees, in particular at most 85 degrees of angle to the radial direction.

The first cross section may extend through the guide surface. The guide surface may have a lower end (at the bottom of the plane plate) which is located at a height (level) from the axial direction. In the first cross section, a turning region of the plane plate may be arranged between the first region and the third region. This turning region can be arranged opposite to the axial direction below the lower end.

It is further proposed a press tool for a press, at least comprising a first plane plate and a second plane plate. At least the first plane plate is movable over at least one lifting cylinder along an axial direction for actuating 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 in each case at least one at least partially cylindrical guide surface for contacting a common guide plate for the plane plates and in each case one centrally arranged receptacle for contacting the stamp or a stamp holder of the press. The plane plates are long one axial direction can be arranged one above the other, so that the respective at least one guide surface of each plane plate are arranged coaxially to each other. At least the first plane plate may be implemented like a plane plate described above. The plane plates are at least partially overlapping each other along the axial direction and along the radial direction. In particular, therefore, they can be arranged relative 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 nested (and thus not only spaced apart in the axial direction) so that an overall height of the press tool can be reduced. Nested here means that the plane plates can be arranged next to one another along the axial direction and in the radial direction at least with parts of the plane plates.

The plane plates of the press tool can each have at least two at least partially cylindrical Führungsfiächen for contacting two common for the planar plates guide columns. The first plane plate has a first at least partially cylindrical Führungsfiäche with a first lower end and the second plane plate a third at least partially cylindrical Führungsfiäche with a third lower end. The first plane plate is disposed opposite to the axial direction above the second plane plate. The plane plates are arranged relative 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 (other, ie) second guide column of the common guide columns. The first lower end is disposed opposite to the axial direction below the third lower end.

As stated above for the plane plate, the guide surfaces of a plane plate can be arranged at different heights, so that the guiding surfaces of different plane plates at different guide columns in the axial direction in a relation to the plane plates reversed order can be arranged. In this way, tilting of the plane plate about an axis perpendicular to the axial direction relative to a plane plate with guide surfaces arranged exclusively on a common height can be reduced or completely prevented and a nested arrangement of the plane plates can be realized so that an overall smaller overall height of the press tool is made possible , The statements on the plane plate apply equally to the press tool and vice versa.

It is further proposed to use a plane plate, in particular a plane plate described above, in a press tool, in particular in a press tool described above, a press for producing a green compact. In particular, sinterable green compacts can be produced with the press, ie green compacts which can be sintered after the pressing process. In particular, metallic and / or ceramic powders can be pressed into green compacts in the press.

The plane plate is movable over at least one lifting cylinder along an axial direction for actuating a punch of the press. The planar plate has an upper side pointing in a first axial direction and a lower side facing in a first axial direction, 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 parallel to the axial direction first at least partially cylindrical guide surface for contacting a first guide column and a parallel to the axial direction second at least partially cylindrical Guide surface for contacting a second guide column. At the bottom of the plane plate, the first guide surface has a first lower end and the second guide surface has a second lower end. The first lower end and the second lower end are arranged at different heights from one another in relation to the axial direction and thus spaced apart in the axial direction.

The statements on the plane plate and / or the press tool apply equally to the proposed use and vice versa.

In particular, a method for actuating a press can be realized with the plane plate and / or the press tool, wherein the press comprises at least one guide column and at least one lifting cylinder and a press tool (described above). The method comprises at least the following steps:

a) providing the press and the press tool;

b) arranging the first plane plate and the second plane plate in the press; wherein the plane plates are arranged one above the other along an axial direction so that the respective at least one at least partially cylindrical guiding surface of each plane plate is arranged coaxially with one another;

wherein the plane plates are arranged overlapping each other along the axial direction so that at least parts of the two plane plates are disposed at a same height from the axial direction (and thus adjacent to each other along the radial direction).

The shape of the plane plate can be produced with the known production methods such as turning, milling, sawing, drilling and grinding, wire cutting, die sinking and hard milling etc. The plane plate can be defined by so-called additive ve method, z. As laser sintering (3D printing process, for the production of spatial structures of powdery starting material by sintering, workpiece is produced in layers) are produced. As a result, a free design of the plane plate is possible, wherein the weight of the plane plate is reduced and a rigidity or elasticity of the plane plate can be adjusted specifically.

In particular, the rigidity of the plane plate designates the resistance of the plane plate to deformation in the axial direction in relation to a pressing force acting on the receptacle by the lifting cylinders on the connection or by the punch or punch holder. The unit of stiffness is: N / m [Newton / meter].

The stiffness can be determined, for example, as follows: Via 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 in particular in the axial direction on the plane plate (ie the displacement of the material of the plane plate in the direction of the axial direction, which can be given in [m]). The ratio of these quantities (pressing force [N] / material displacement [m]) represents the rigidity of the plane plate.

The lower the rigidity of the plane plate, the greater the elastic deformation (the elasticity) of the plane plate. Different stiffnesses of the different plane plates can lead to crack formation during the production of green compacts (especially during removal from the mold or during release of the pressing force) and thus to destruction of the green body.

The elasticity or rigidity of at least two plane plates, in particular of all plane plates (as described above), preferably deviates from one another by a maximum of 20% or by a maximum of 10%. It should be noted that the number words used here ("first", "second",...) Primarily serve (only) to distinguish a plurality of identical objects or variables, that is to say, in particular, they do not require any dependence and / or order of these objects or variables on one another pretend. If a dependency and / or order are required, this is explicitly stated here or it obviously results for the person skilled in the art when studying the concretely described embodiment. The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. The same reference numerals designate the same objects, so that explanations of other figures can be used if necessary. Show it:

Fig. 1: a press tool of a press in a perspective view, partially in section;

Fig. 2: the press tool of Figure 1 in a perspective view, in section.

Fig. 3: the press tool according to Figures 1 and 2 in a view from above along the axial direction. a side view of the press tool in section IV-IV of FIG. 3; the press tool of Figure 1 to 4 in a side view in a further section VV of FIG. 3. a plane plate of the press tool of Figure 1 to 5 in a perspective view. the plane plate of Figure 6 in a further perspective view. the plane plate of Figure 6 and 7 in a side view in section VIII-VIII of FIG. 9. the plane plate of Figure 6 to 8 in a view from above along the axial direction. a known press tool in a side view in section; a known adapter for a press in a side view in section; a known press frame for an adapter; a further embodiment of a press tool of a press in a perspective view, partially in section; the press tool of Figure 13 in a view from above along the axial direction.

FIG. 15: a side view of the press tool according to FIGS. 13 and 14 in FIG

Section XV-XV of FIG. 14;

FIG. 16 shows the press tool according to FIGS. 13 to 15 in a side view in a further section XVI-XVI according to FIG. 14; 17 shows a plane plate of the press tool according to FIGS. 13 to 16 in a perspective view;

FIG. 18 shows the plane plate according to FIG. 17 in a view from above along the axial direction; FIG.

FIG. 19 shows the plane plate according to FIGS. 17 and 18 in a side view; the plane plate of FIG. 17 to 19 in a side view in section

XX- XX of FIG. 18; and the plane plate of Fig. 17 to 20 in a side view in section

XXI- XXI of FIG. 18.

1 shows a press tool 2 of a press 3 in a perspective view, partly in section. FIG. 2 shows the press tool 2 according to FIG. 1 in a perspective view, in section II-II according to FIG. 3. FIG. 3 shows the press tool 2 according to FIGS. 1 and 2 in a view from above along the axial direction 5. In Fig. 3, the curves of the section lines II-II, IV-IV and VV are shown. 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 according to FIGS. 1 to 4 in a side view in a further section VV according to FIG. 3. FIGS. 1 to 5 will be described jointly below. The press tool 2 comprises a plurality of plane plates 1, 33, two first plane plates 1 and two second plane plates 33, ie four, which are arranged one above the other along the axial direction 5. As shown in FIG. 9, each of the four plane plates 1, 33 is displaced along the axial direction 5 by two lift cylinders, a first lift cylinder 4, and a second lift cylinder 47. Each plane plate 1, 33 thus has two connections, a first connection 34 for the first lifting cylinder 4 and a second connection 46 for the second lifting cylinder 47. Further, four guide columns, two first guide columns 8 and two second guide columns 37 are provided, each plane plate 1, 33 each having four cylindrical Führungsfiächen, namely first guide surfaces 7 on the first guide column 8 and second Führungsfiächen 31 on the second guide column 37 (wherein the second plane plate 33 has at least a third guide surface 35 on the second guide column 37) for contacting the common for the plane plates 1, 33 guide columns 8, 37 has. In addition, each plane plate 1, 33 has in each case a centrally arranged receptacle 9 for contacting the stamp 6 (see FIG. 8) or a stamp holder (also symbolized here by the stamp 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 arranged coaxially with the corresponding guide surfaces 7, 31, 35 of the other plane plates 1, 33. The plane plates 1, 33 are 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 at an equal height 29 with respect to the axial direction 5 (and thus along the radial direction 11 adjacent to each other) are arranged. The plane plates 1, 33 can be connected the nested (and thus not spaced apart in the axial direction 5) are arranged so that a height 48 of the press tool 2 can be reduced. Nested means here that the plane plates 1, 33 can be arranged next to one another along the axial direction 5 and in the radial direction 11 at least in parallel with parts of the different plane plates 1, 33.

The press tool 2 here further comprises a base plate 49 and a Matriensaufhahmeplatte 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 plates 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 relative to one another such that the first guide surface 7 has a first guide column 8 of the common guide columns 8, 37 and the third guide surface 35 (another, ie) second guide column 37 of the common guide columns 8, 37 contacted. In this case, the first lower end 28 is arranged opposite to the axial direction 5 below the third lower end 36 (see FIG. 4 with the sectional profile IV-IV shown in FIG. 3).

As stated above for the plane plate 1, 33, the guide surfaces 7, 31, 35 of a plane plate 1, 33 to be arranged at different heights 29, so that the guide surfaces 7, 31, 35 of different plane plates 1, 33 at different guide columns 8, 37 in the axial direction 5 in a relation to the plane plates 1, 33 reversed order can be arranged. In order to For example, tilting of the plane plate 1, 33 about an axis perpendicular to the axial direction 5 with respect to a plane plate 1, 33 with guide surfaces 7, 31, 35 arranged exclusively on a common height 29 can be reduced or completely prevented and a nested arrangement of the plane plates 1, 33 are realized, so that an overall lower overall height 48 of the press tool 2 is made possible.

With the plane plate 1, 33 and the press tool 2, a method for actuating a press 3 can be realized, the press 3 comprising at least one guide column 8, 37 and at least one lifting cylinder 4, 47 and a press tool 2 described above. According to step a) of the method, the press 3 and the press tool 2 are provided. According to step b) of the method, at least the first plane plate 1 and the second plane plate 33 are arranged in the press 3 (ie, between the base plate 49 and the die receiving plate 50). In this case, the plane plates 1, 33 along an axial direction 5 are arranged one above the other, that the respective at least one cylindrical guide surface 7, 31, 35 of each plane plate 1, 33 are arranged coaxially to each other. The plane plates 1, 33 are 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 at an equal height 29 with respect to the axial direction 5 (and thus along the radial direction 11 adjacent to each other) are arranged.

Visible, the plane plates 1, 33 are made in one piece.

In the following, reference is made to the respectively second lowest of the illustrated plane plates of FIGS. 1 to 5. The plane plate 1 is movable over at least one lifting cylinder 4, 47 along an axial direction 5 for actuating a punch 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 parallel to the axial direction 5 cylindrical Führungsfiäche 7, 31 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 extends parallel to the axial direction 5 and along a direction perpendicular to the axial direction 5 radial direction 11 between the receptacle 9 and the Führungsfiäche 7, at least a first region 12, in which a Wall thickness 13 of the plane plate 1 changes continuously. The plane plate 1 shown is actuated by two lifting cylinders 4, 47, the plane plate 1 each having a connection 34, 46 for each lifting cylinder 4, 47. The or the lifting cylinder 4, 47 is / are arranged in particular so with respect to the plane plate 1, that the plane plate 1 is acted upon by a minimum torque to the radial direction 11 parallel axis.

The plane plate 1 has four Führungsfiächen 7, 31, which are arranged in a direction perpendicular to the axial direction 5 spaced from each other. Via the at least one guide surface 7, 31, the plane plate 1 can be guided along the axial direction 5 through the at least one guide column 8, 37, which extends along the axial direction 5. A rotation of the plane plate 1 in a circumferential direction 18 and / or a tilting of the plane plate 1 about a rotational axis / direction running along a radial direction 11 is reduced or prevented via the at least one guide column 8, 37. The various plane plates 1, 33 of an upper or lower press tool 2 (here only lower press tools 2 are shown) 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 receptacle 9 is arranged between a plurality of lifting cylinders 4, 47 and a plurality of guide columns 8, 37, so that the plane plate 1 is acted upon by a pressing force by the lowest possible torque about an axis parallel to the radial direction 11 when the plane plate 1 is acted upon becomes.

The receptacle 9 is here circular and has a parallel to the axial direction 5 extending, for receiving 9 concentrically arranged longitudinal axis. The radial direction 11 extends perpendicular to the axial direction 5 and in each case proceeding from the longitudinal axis.

The receptacle 9 has a receiving surface for contacting and supporting the stamp 6 or punch holder. The punch 6 or the punch holder can be attached to the receptacle 9 via a clamping plate, a screw connection, a bayonet catch or the like.

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 plane plate has at least one first region 12 in which a Wall thickness 13 of the plane plate 1 changes continuously. In this case, the wall thickness 13 is determined in a direction parallel to the axial direction 5.

This wall thickness 13 changes continuously, ie at each position adjacent to one another along the radial direction 11, the first area 12 has a respective other wall thickness 13. The first region 12 extends in the radial direction 11 over a first extension 14, which amounts to 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 receptacle 9 comprises a receiving surface or a functional region (also referred to below as parts of the receptacle 9) on the plane plate 1, on which the plunger 6 or a stamp holder can be arranged. The smallest distance 15 is determined between the first guide surface 7 and a part of the receptacle 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 FIGS. 2 and 4), which runs along the radial direction 11 between the receptacle 9 and the second guide surface 31 and with respect to the first cross section 10 by an angular range 17 of 90 degrees in here a circumferential direction 18 is arranged rotated (see FIG. 3), at least a second region 19, in which the wall thickness 13 of the plane plate 1 changes continuously. In this case, the second region 19 extends in the radial direction 11 over a second extension 20, which differs from the first extension 14 (in terms of absolute value).

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 extends at a second angle 24 to the radial direction 11; wherein the second extension 20 is different from the first extension 14. It can be seen from FIGS. 4 and 5 that exclusively a cross-section arranged to be rotated by an angular range 17 of 180 degrees in the circumferential direction 18 relative to the first cross-section 10 is identical to the first cross-section 10.

Also, the second cross section 16 is parallel to the axial direction 5 and along a direction perpendicular to the axial direction 5 radial direction 11, that is rotated relative to the first cross section 10 only in a circumferential direction 18.

As can be seen, the wall thickness 13 varies in the first area 12 and in the second area 19.

The first region 12 has a first center line 21 in the first cross section 10, wherein the first center line 21 extends 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 center points 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 adjoining the first region 12 (or the second region 19) in the radial direction 11, the third region 25 a third center line 26, wherein the third center line 26 extends 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 opposite to the radial direction 11 in opposite directions.

The planar plate 1 has an upper side 39 pointing in a first axial direction 38 and a second axial one opposite to the first axial direction 38 Direction 40 facing bottom 41. The upper side 39 and the lower side 41 of the planar 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. 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, a turning region 30 of the plane plate 1 is arranged. The turning region 30 arranged in the first cross section 10 between the first region 12 and the third region 25 is arranged opposite to the axial direction 5 below the first lower end 28.

Furthermore, the plane plate 1 has at least two cylindrical guide surfaces 7,

31 for contacting each of a guide column 8, 37, 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 facing each other the axial direction 5 different heights 29 are arranged.

The lower ends, that is, the first lower end 28 and the second lower end 32 are arranged on an underside 41 of the plane plate 1. The lower ends 28,

32 of in each case two cylindrical guide surfaces 7, 31 of a plane plate 1 (namely, those of the respective first guide surface 7 or of the respective second guide surface 31) are arranged on a common height 29 (see Fig. 2). The two cylindrical guide surfaces 7, 31 with which on the ge The common height 29 arranged lower ends 28, 32 are arranged in a circumferential direction 18 offset by 180 degrees to each other.

The plane plate 1 has at least two cylindrical guide surfaces 7, 31 for contacting each of 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 32nd and a second upper end 45, wherein the first lower end 28 is disposed opposite the axial direction 5 below the second lower end 32 at a different height 29 and wherein the first upper end 43 opposite the axial direction 5 below the second upper End 45 is disposed at a different height 29 (see Fig. 4).

The connection 34 on the upper side 39 has an upper connection surface 44. The first upper end 43 and the upper attachment surface 44 are arranged at different heights 29 from each other relative to the axial direction 5 and thus spaced apart in the axial direction 5 (see FIG. 4).

The upper attachment surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 in a height 29 different from the axial direction 5 (see FIG. 4).

The upper attachment surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second lower end 32 in a height 29 different from the axial direction 5 (see FIG. 4).

In Fig. 5 is shown with respect to the uppermost of the plane plates 1, 33 that the (first) plane plate 1 in at least a first cross-section 10, which are parallel to the axial direction 5 and along a direction perpendicular to the axial direction 5

de - the radial direction 11 between the first connection 34 and the receptacle 9 (and between the second connection 46 and the receptacle 9) extends, at least a first region 12 having a wall thickness 13, wherein the wall thickness 13 in the first region 12 and spaced from the receptacle 9 and from the first connection 34 (or from the second connection 46) has a minimum 42.

The plane plate 1 is contacted via two lifting cylinders 4, 47 and is movable along an axial direction 5 for actuating 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 on a height 29 which is common with respect to the axial direction 5.

Here, the minimum 42 is formed as an opening which connects an upper side 39 pointing in a first axial direction 38 and an underside 41 of the plane plate 1 facing 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 in the first cross section 10 a first center line 21, wherein the first center line 21 extends 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 facing in a second axial direction 40 opposite to the first axial direction 38, wherein the at least one Guide surface 7, 31 at the top 39 has an upper end 43; wherein the connection 34 on the upper side 39 has an upper connection surface 44. The upper end 43 and the upper attachment surface 44 are arranged at different heights 29 from each other relative to the axial direction 5 and thus spaced apart in the axial direction 5 (see FIG. 4).

FIG. 6 shows a plane plate 1 of the press tool 2 according to FIGS. 1 to 5 in a perspective view. FIG. 7 shows the first plane plate 1 according to FIG. 6 in a further perspective view. FIG. 8 shows the first plane plate 1 according to FIGS. 6 and 7 in a side view in section VIII-VIII according to FIG. 9. FIG. 9 shows the first plane plate 1 according to FIGS. 6 to 8 in a view from above along the axial direction 5. Figs. 6 to 9 will be described together below. Reference is made to the comments on FIGS. 1 to 5.

The plane plate 1 shown is actuated by two lifting cylinders 4, 47, the first plane plate 1 each having a connection 34, 46 for each lifting cylinder 4, 47. The lifting cylinders 4, 47 are arranged opposite the first plane plate 1 in such a way that the first plane plate 1 is acted upon by an axis which is parallel to the radial direction 11 by a torque which is as low as possible.

The first plane plate 1 has four guide surfaces 7, 31, which are arranged in a direction perpendicular to the axial direction 5 spaced from each other. Via the one guide surfaces 7, 31, the first plane plate 1 along the axial direction 5 by the at least one guide column 8, 37 are guided, 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 about one along a radial direction 11 extending axis / direction reduces or prevents.

The receptacle 9 for contacting the punch 6 or a punch holder of the press 3 is arranged centrally, d. H. in a center of the first plane plate 1 when viewed along the axial direction 5 (see Fig. 9). The receptacle 9 is thus arranged between a plurality of lifting cylinders 4, 47 and a plurality of guide columns 8, 37, so that the first plane plate 1 with a pressing force (along the axial direction 5) by applying as little as possible to the first plane plate 1 Torque is applied to an axis parallel to the radial direction 11 axis.

The receptacle 9 has a receiving surface for contacting and supporting the stamp 6 or punch holder. The punch 6 or the punch holder can be attached to the receptacle 9 via a clamping plate, a screw connection, a bayonet catch or the like (see FIG. 7).

Further, the first plane plate 1 at least four cylindrical guide surfaces 7, 31 for contacting each of a guide column 8, 37, wherein a cylindrical first guide surface 7, 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 on each other from the axial direction 5 different heights 29. The lower ends 28, 32 are arranged on an underside 41 of the first plane plate 1. The lower ends 28, 32 of each two cylindrical guide surfaces 7, 31 of a first plane plate 1 are arranged on a common height 29. The two cylindrical guide surfaces 7, 31 with the arranged on the common height 29 lower ends 28, 32 are arranged in a circumferential direction 18 offset by 180 degrees to each other.

The first plane plate 1 has at least two cylindrical guide surfaces 7, 31 for contacting each of 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 disposed opposite to the axial direction 5 below the second lower end 32 at a different height 29 and wherein the first upper end 43 relative to the axial direction 5 below the second upper end 45 is disposed at a different height 29.

The first guide surface 7 has on the upper side 39 of the plane plate 1, a first upper end 43, wherein the first lower end 28 and the first upper end 43 on opposite to the axial direction 5 different heights 29 and thus in the axial direction 5 in a Distance apart from each other. The first lower end 28 and the second lower end 32 are spaced apart in the axial direction 5 by approximately 250% of the distance.

The connection 34 on the upper side 39 has an upper connection surface 44. The first upper end 43 and the upper attachment surface 44 are arranged at different heights 29 from each other relative to the axial direction 5 and thus spaced apart in the axial direction 5. The upper attachment surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 in a height 29 different from the axial direction 5.

The upper attachment surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second lower end 32 in a height 29 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 base 53 of an adapter 51 of a press 3 (see FIGS. 11 and 12). The press tool 2 comprises four plane plates 1, which are arranged one above the other along the axial direction 5. Each of the four plane plates 1 is displaced by two lifting cylinders 4 along the axial direction 5. Each plane plate 1 thus has two connections 34. Furthermore, four guide columns 8 are provided, each plane plate 1 each having four cylindrical guide surfaces 7 on the guide column 8 for contacting the common guide plates 8 for the plane plates 1. Furthermore, each plane plate 1 has in each case a centrally arranged receptacle 9 for contacting the stamp 6 (cf., FIG. 8) or a stamp holder (also symbolized here by the stamp 6) of the press 3. 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 with 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. In the known press tool 2, the individual plane plates 1 are spaced from one another in the axial direction 5 and arranged one above the other, ie 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 up to a cylindrical guide surface 7, which is provided for contacting one of the guide columns 8.

The plane plates 1 are rectangular in cross section and have a constant wall thickness 13. The receptacle 9 is cylindrical in this case and extends from the plane plate 1 along the axial direction 5. The receptacles 9 of the lower plane plates 1 are each made longer than the receptacle 1 of the adjacently arranged plane plate 1. The change in cross section is not in the range 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 provided only at a respective specific position, namely on the receptacle 9. The change in cross section is formed in each case by parallel to the axial direction 5 extending side walls.

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 plane plates 1, base plate 49 and die receiving plate 50. Reference is made to the statements relating to FIG.

Fig. 12 shows a known press frame 54 for receiving an adapter 51, z. B. the adapter 51 of FIG. 11. The adapter 51 is supported on the press frame 54 from. 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 and the press tool 2 (ie at least the adapter base 53) according to FIGS. 10 to 12 has a large overall height 48 in the axial direction 5. In this case, starting from the die receiving plate 50 for each tool plane, which also includes the respective plane plate 1, the individual components of the relevant tool plane (ie punch 6, possibly associated punch holder, receptacle 9) extend along the axial direction 5 differently far, so that different elasticities are present for each tool level. As a result of the different elasticities, demolding of the green compact to be produced by the different expansion of the components between different tool levels during the relaxation of the tool levels (pressing force is reduced) can be problematical, with cracks occurring 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 according to FIG. 13 in a view from above along the axial direction 5. In FIG. 14, the curves of the section lines XV-XV and XVI-XVI are shown. 15 shows a side view of the press tool 2 according to FIGS. 13 and 14 in section XV-XV according to FIG. 14. FIG. 16 shows the press tool 2 according to FIGS. 13 to 15 in a side view in a further section XVI-XVI according to FIG 14. Figures 13 to 16 will be described together below. Reference is made to the comments on Figs. 1 to 5. In contrast to the press tool 2 or the press 3 according to FIGS. 1 to 5, the press tool 2 here eight (8) guide columns 8, 37, namely four (4) first guide columns 8 and four (4) second guide columns 37th Die Führungssäulen 8, 37 each extend from the base plate 49 to the die receiving plate 50.

Next, each plane plate 1, 33 each have 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 plane plate 1, 33. Visible, the connections 34, 46 of the lifting cylinder 4, 47 on a plane plate each on one same height 29 arranged.

The plane plates 1, 33 of the press tool 2 each have eight cylindrical guide surfaces 7, 31, 35 for contacting eight for the plane plates 1, 33 common guide columns 8, 37. 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 relative to one another such that the first guide surface 7, a first guide column 8 of the common guide columns 8, 37 and the third guide surface 35 a (Others, ie) second guide column 37 of the common guide columns 8, 37 contacted. In this case, the first lower end 28 is arranged below the third lower end 36 relative to the axial direction 5 (see FIGS. 15 and 16).

FIG. 17 shows a plane plate 1 of the press tool 2 according to FIGS. 13 to 16 in a perspective view. FIG. 18 shows the plane plate 1 according to FIG. 17 in a view from above along the axial direction 5. FIG. 19 shows the planes plate 1 of FIG. 17 and 18 in a side view. 20 shows the plane plate 1 according to FIGS. 17 to 19 in a side view in section XX-XX according to FIG. 18. FIG. 21 shows the plane plate 1 according to FIGS. 17 to 20 in a side view in section XXI-XXI according to FIG. 18. FIGS. 17 to 21 will be described below together. Reference is made to the comments on Figs. 13 to 16 and 6 to 9.

The plane plate 1 shown is actuated by two lifting cylinders 4, 47, the first plane plate 1 each having a connection 34, 46 for each lifting cylinder 4, 47.

Furthermore, the plane plate 1 has eight cylindrical guide surfaces 7, 31, each guide surface 7, 31 contacting a guide column 8, 37, 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 (see FIG. 21), wherein the first lower end 28 and the second lower end 32 are arranged on mutually different heights 29 from the axial direction 5. The lower ends 28, 32 are arranged on an underside 41 of the plane plate 1. Here, all four (4) first lower ends 28 of the first guide surfaces 7 are each arranged at a common height. Further, all four (4) second lower ends 32 of the second Führungsfiächen are each arranged at a common height. The first cylindrical guide surfaces 7 with the first lower ends 28 arranged on the common height 29 are arranged offset by 90 degrees in a circumferential direction 18 (the second guide faces 31 likewise) and in a circumferential direction 18 offset by 45 degrees from the first Guide surfaces 7). The first plane plate 1 has eight cylindrical guide surfaces 7, 31, wherein first guide surfaces 7 contact first guide columns 8 and second guide surfaces 31 contact second guide columns 37. First cylindrical guide surfaces 7 each have a first lower end 28 and a first upper end 43, wherein second cylindrical guide surfaces 31 each have a second lower end 32 and a second upper end 45. The first lower end 28 is disposed opposite the axial direction 5 below the second lower end 32 at a different height 29. The first upper end 43 is arranged opposite the axial direction 5 below the second upper end 45 at a different height 29.

The first connection 34 and the second connection 46 have 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 relative to the axial direction 5 and thus spaced apart in the axial direction 5.

The upper attachment surface 44 is arranged along the axial direction 5 between the first upper end 43 and the second upper end 45 in a height 29 different from the axial direction 5.

The plane plate 1 has in at least a first cross section 10 (eg, shown in Fig. 20), which extends parallel to the axial direction 5 and along a direction perpendicular to the axial direction 5 radial direction 11 between the receptacle 9 and the first guide surface 7 , at least a first region 12, in which a wall thickness 13 of the plane plate 1 changes continuously. In this case, the wall thickness 13 is determined in a direction parallel to the axial direction 5.

This wall thickness 13 changes continuously, d. H. At each position adjacent to each other along the radial direction 11, the first region 12 has a respective other 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 extends at a first angle 22 to the radial direction 11. The first center line 21 is formed by the center points of the wall thickness 13 present at the respective radial position.

LIST OF REFERENCE NUMBERS

1 first plane plate

2 press tool

3 press

4 (first) lifting cylinder

5 axial direction

6 stamps

7 (first) leadership

8 guide pillar

9 recording

10 first cross section

11 radial direction

12 first area

13 wall thickness

14 first extension

15 distance

16 second cross section

17 angular range

18 circumferential direction

19 second area

20 second extension

21 first center line

22 first angle

23 second center line

24 second angle

25 third area

26 third center line

27 third angle 28 (first) lower end

29 height

30 turning range

31 second guide surface

32 second lower end

33 second level plate

34 (first) connection

35 third guide surface

36 third lower end

37 second guide column

38 first axial direction

39 top

40 second axial direction

41 bottom

42 minimum

43 (first) upper end

44 upper connection surface

45 second upper end

46 second connection

47 second lifting cylinder

48 height

49 base plate

50 female retainer plate

51 adapters

52 adapter top

53 adapter base

54 press frame

55 clutch

Claims

claims

Plane plate (1) for a press tool (2) of a press (3); wherein the plane plate (1) via at least one lifting cylinder (4) along an axial direction (5) for actuating a punch (6) of the press (3) is movable; wherein the plane plate (1) has an upper side (39) facing in a first axial direction (38) and a lower side (41) pointing in a second axial direction (40) opposite the first axial direction (38), a connection (34) for the at least one lifting cylinder (4), a centrally arranged receptacle (9) for contacting the punch (6) or a punch holder of the press (3) and at least one first at least partially cylindrical Führungsfiäche (7) for contacting parallel to the axial direction (5) a first guide column (8) and a second at least partially cylindrical Führungsfiäche (31) parallel to the axial direction (5) for contacting a second guide column (37); wherein on the underside (41) of the planar plate (1) the first guide surface (7) has a first lower end (28) and the second Führungsfiäche (31) has a second lower end (32), wherein the first lower end (28) and the second lower end (32) are disposed at different heights (29) from each other with respect to the axial direction (5) and spaced therefrom in the axial direction (5).

A planar plate (1) according to claim 1, wherein at the top (39) of the plane plate (1) the first guide surface (7) has a first upper end (43), the first lower end (28) and the first upper end (43 ) are spaced apart from each other with respect to the axial direction (5) at different heights (29) and thus at a distance from each other in the axial direction (5); the first lower end (28) and the second lower end (32) in the axial direction (5) are spaced apart by at least 50% of the distance.

Plane plate (1) according to one of the preceding claims, wherein the plane plate (1) has four at least partially cylindrical Führungsfiächen (7, 31) for contacting four guide columns (8, 37); each guide surface (7, 31) having a lower end (28, 32); wherein the lower ends (28, 32) of two Führungsfiächen (7, 31) are arranged at a common height (29).

Plane plate (1) according to claim 3, wherein the two Führungsfiächen (7, 31) with the arranged on the common height (29) lower ends (28, 32) in a circumferential direction (18) by 90 or 180 degrees offset from each other ,

Plane plate (1) according to claim 1 or 2, wherein all lower ends (28, 32) of Führungsfiächen (7, 31) of a plane plate (1) on mutually different from the axial direction (5) heights (29) are arranged.

Level plate (1) according to one of the preceding claims, wherein the plane plate (1) in at least a first cross section (10) parallel to the axial direction (5) and along a direction perpendicular to the axial direction (5) radial direction (11) between the receptacle (9) and one of the Führungsfiächen (7, 31) extends, at least a first region (12) having a wall thickness (13) and a first center line (21); wherein the first region (12) extends in the radial direction (11) over a first extent (14) in which the first centerline (21) extends at a first angle (22) of at least 10 degrees of arc to the radial direction (11) , Level plate (1) according to claim 6, wherein the first extension (14) at least 10% of a smallest distance (15) between the receptacle

(9) and the guide surface (7, 31) in the first cross-section (10) along the radial direction (11).

Level plate (1) according to one of the preceding claims 6 and 7, wherein the plane plate (1) in at least a second cross section (16) along a radial direction (11) between the receptacle (9) and one of the guide surfaces (7, 31 ) and disposed opposite the first cross section (10) rotated by an angular range (17) in a circumferential direction (18), at least a second region (19) having 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 centerline (23) extends at a second angle (24) of at least 10 degrees of arc to the radial direction (11); wherein the second extension (20) differs from the first extension (14).

Plane plate (1) according to one of the preceding claims 6 to 8, wherein the plane plate (1) in the first cross section (10), in the radial direction (11) to the first region (12) adjoining the third region (25) wherein the third region (25) has a third centerline

(26), wherein the third centerline (26) is at a third angle

(27) of at least 10 degrees of angle to the radial direction (11), wherein the first angle (22) and the third angle (27) relative to the radial direction (11) are oriented in opposite directions.

Level plate (1) according to claim 9, wherein the first cross section

(10) extends through one of the guide surfaces (7, 31) and the guide (7, 31) has a lower end (28, 32) which is arranged opposite to the axial direction (5) at a height (29), wherein in the first cross section (10) between the first region (12) and third region (25) a turning region (30) of the plane plate (1) is arranged, said turning region (30) relative to the axial direction (5) below this lower end (28, 32) is arranged.

A press tool (2) for a press (3), comprising at least a first plane plate (1) and a second plane plate (33), wherein at least the first plane plate (1) via at least one lifting cylinder (4) along an axial direction (5) Actuation of a punch (6) of the press (3) is movable; wherein at least the first plane plate (1) has a connection (34) for the at least one lifting cylinder (4), each plane plate (1, 33) each having at least one at least partially cylindrical guide surface (7, 31) for contacting one for the Level plates (1) common guide column (8, 37) and in each case a centrally arranged receptacle (9) for contacting the punch (6) or a punch holder of the press (3); wherein the plane plates (1, 33) can be arranged one above the other along an axial direction (5), so that the respective at least one guide surface (7, 31) of each plane plate (1, 33) are arranged coaxially with one another; wherein at least the first plane plate (1) is a plane plate (1) according to one of the preceding claims; wherein the plane plates (1, 33) along the axial direction (5) and along the radial direction (11) are at least partially overlapping arranged.

Press tool (2) according to claim 11, wherein the plane plates (1, 33) each have at least two at least partially cylindrical guide surfaces (7, 31) for contacting two for the plane plates (1, 33) common guide columns (8, 37); being the first plane plate (1) a first guide surface (7) having a first lower end (28) and the second plane plate (33) has a third guide surface (35) with a third lower end (36), wherein the first plane plate (1) relative to the axial Direction (5) can be arranged above the second plane plate (33) and the plane plates (1, 33) can be arranged relative to one another such that the first guide surface (7) has a first guide column (8) of the common guide columns (8, 37 ) and the third guide surface (35) contacts a second guide column (37) of the common guide columns (8, 37); wherein the first lower end (28) with respect to the axial direction (5) below the third lower end (36) is arranged.

Use of a plane plate (1) in a press tool (2) of a press (3) for producing a green compact; wherein the plane plate (1) via at least one lifting cylinder (4) along an axial direction (5) for actuating a punch (6) of the press (3) is movable; wherein the plane plate (1) has an upper side (39) facing in a first axial direction (38) and a lower side (41) pointing in a second axial direction (40) opposite the first axial direction (38), a connection (34) for the at least one lifting cylinder (4), a centrally arranged receptacle (9) for contacting the punch (6) or a punch holder of a press (3) and at least one to the axial direction (5) parallel first first at least partially cylindrical guide surface (7) for contacting a first guide pillar (8) and a second at least partially cylindrical guide surface (31) parallel to the axial direction (5) for contacting a second guide pillar (37); wherein on the underside (41) of the planar plate (1), the first guide surface (7) has a first lower end (28) and the second guide surface (31) has a second lower end (32), the first lower end (28) and the second lower end (32) being at different heights (29) from each other in relation to the axial direction (5) and thus spaced apart in the axial direction (5).