EP2567763B1 - Forming tool with cooling channel boreholes branches within the tool elements - Google Patents

Description

The invention relates to a mold for hot forming metal sheet, in particular press hardening of sheet metal, with a plurality of adjoining, a mold surface defining tool parts, wherein the mold surface is complementary to at least a portion of a produced by hot forming sheet metal part, and wherein the tool parts have cooling channels in the form of holes that extend along the molding surface.

In the hot forming of steel sheets, sheet steel blanks are heated to austenitizing temperature in a heat treatment apparatus, then hot-laid in a mold (press tool) and formed. Still clamped in the mold, the sheet metal parts are hardened by cooling the mold. The simultaneous forming and cooling of the hot steel blanks after austenitization results in a martensitic microstructure in the end product which gives the component a yield strength and a tensile strength above 1000 MPa and 1500 MPa, respectively. The steel sheets used in this case are usually boron-alloyed steel grades, for example steel grade 22MnB5. Press-hardened sheet steel parts are characterized by a high to very high strength with a relatively low component weight.

Known molds for press hardening of steel sheets have drilled cooling channels for the circulation of cooling liquid.

In addition, molds for press hardening of steel sheets are known, the punch and die are each formed from an outer part defining the mold surface and a complementary inner part (insert), wherein at least one of the cooling surfaces of the outer part and the inner part in at least one of the mutually facing surfaces Circulation of coolant is formed, by milling and / or during the casting of the outer part or inner part (see. DE 10 2007 047 314 A1 ). The production of the complementary adjacent outer and inner parts of such molds is very expensive, in particular, the leak-free sealing of running in the region of the dividing surface between the outer and inner part of the cooling channel is difficult.

From the US 2006/0138698 A1 is a mold for press hardening of metal sheets is known, the punch and die are each composed of a plurality of disc-shaped, interconnected tool parts, wherein the adjacent surfaces of the tool parts of the punch or the die respectively transversely to the longitudinal axis of the mold or produced therein by hot forming Sheet metal components run. The disk-shaped tool parts of the punch or the die in this case each have mutually connected sections of drilled distribution or collection channels for cooling liquid, wherein in the adjacent surfaces of the tool parts cooling channels are milled, which branch off from the distribution or collection channels and contour parallel to the molding surface of the respective disc-shaped tool part. The leak-free sealing of the abutting disc-shaped tool parts should be easier and more reliable possible than with molds according to the DE 10 2007 047 314 A1 the case is. The production of the from US 2006/0138698 A1 However, known mold is very time consuming and costly due to the large number of disc-shaped tool parts. In addition, due to the cooling channel arrangement, which is characterized by a multiplicity of milled cooling channels extending transversely to the longitudinal axis of the molding tool and by a small number of cooling water connections to the distribution or collecting channels, a very irregular flow velocity in the individual milled cooling channels and thus a corresponding result uneven cooling performance over the respective molding surface.

The present invention has for its object to provide a mold (pressing tool), which offers a high and uniform cooling performance over a large mold surface and can be produced relatively cheap.

This object is achieved by a mold with the features specified in claim 1.

The mold according to the invention is made up of a plurality of abutting tool parts defining a mold surface, the mold surface being complementary to at least a portion of a sheet metal forming component to be hot worked, and wherein the tool parts have cooling channels in the form of bores extending along the mold surface. According to the invention For example, at least two of the tool parts each have at least one cooling channel branched into at least two cooling channel branches within the tool part, wherein the diverging or converging bore axes of the cooling channel branches extend along the molding surface.

The formation of the cooling channels as holes is advantageous in terms of manufacturing technology. Because the holes can be produced relatively inexpensively and are so far reliably sealed due to their radial distance from the mold surface of the tool parts. In addition, the mutually associated bore ends of the adjoining tool parts can be connected leak-free in a relatively simple manner. Due to the branching of the drilled cooling channels within the workpiece parts, it is possible on the one hand to better adapt the course of the cooling channels to the contour of the forming surface or of the sheet metal component to be produced. On the other hand, it is possible by the cooling channel arrangement according to the invention to minimize the subdivision of the molding tool into adjoining tool parts. The smaller the subdivision of the molding tool into a plurality of juxtaposed tool parts, the lower the production cost for the mold and the lower the effort required for mutual sealing of the tool parts. In particular, can be achieved by the inventive design and arrangement of the cooling channels a very high flow velocity of the cooling liquid in the cooling channels and a relatively uniform velocity distribution over the adjacent cooling channels, so that there is a correspondingly high and uniform cooling capacity based on the molding surface of the mold. It However, it is also within the scope of the invention to specifically influence the cooling capacity, in particular to adapt to a desired strength distribution for the component to be produced by locally different cooling outputs are set in the mold. Such tailored tempering ("tailored tempering") can be achieved, for example, by differently dimensioned cooling channels or cooling channel bore diameter.

The tool parts of the molding tool according to the invention may have one or more drilled cooling channels branched within the tool part. In particular, the branched cooling channel may also have multiple branches, i. have more than two cooling duct branches, wherein the cooling channel branches of the respective tool part can all end on one of the two connecting surfaces of the tool part, or can also end partly on one of the two connecting surfaces and the rest on the other of the two connecting surfaces. The drilled cooling channel branches of the respective tool part each define a passage which originates from or terminates at the associated branched cooling channel. The longitudinal central axes of the cooling channel branches provided in the respective tool part include an acute angle - or, if more than two drilled cooling channel branches, possibly several acute angles - a. The measure of the acute angle is preferably in the range of 5 ° to 45 °, particularly preferably in the range of 5 ° to 30 °.

Furthermore, the tool parts of the molding tool according to the invention can also comprise tool parts without cooling channels and tool parts with one or more non-branched cooling channels. For example, between two Tool parts, which in each case have at least one cooling channel branching into at least two cooling channel branches within the tool part, can be arranged one or more tool parts which have one or more unbranched cooling channels in the form of bores.

To achieve the highest possible cooling liquid speed or cooling capacity, it is also advantageous if according to a preferred embodiment of the molding tool according to the invention, the sum of the clear cross-sectional areas of the at least two cooling duct branches in the range of 1.0 times to 1.3 times, preferably in the range of 1.0 times to 1.2 times the clear cross-sectional area of the branching cooling channel. For example, the diameter of the branching cooling channel can be 12 mm, while two cooling channel branches branching off from the cooling channel each have a diameter of 9 mm. The sum of the clear cross-sectional areas of the two cooling channel branches is in this case about 127.2 mm ² , while the branching cooling channel has a clear cross-sectional area of about 113.1 mm ² .

With regard to a uniform cooling of the hot sheet metal component, it is also advantageous if, according to a further embodiment of the invention, the shortest radial distance of the respective cooling channel branch of the forming surface is equal to the shortest radial distance of another of the at least two cooling channel branches or of the same by not more than 20 %, preferably not more than 10%. A further preferred embodiment of the molding tool according to the invention provides in this context that the shortest distance of the respective branching cooling channel from the molding surface is equal to the shortest distance of one of the at least two cooling duct branches is or differs from it by not more than 20%, preferably not more than 10%.

According to a further preferred embodiment, it is provided that the shortest radial distance of the respective cooling channel branch and / or the branching cooling channel from the molding surface of the tool part in the range of 0.5 to 1.2 times the diameter of the respective cooling channel branch or branching Cooling channel is located.

In particular, in the production of very complex shaped sheet steel components, it is favorable for the uniform cooling of certain portions of the mold when the cooling liquid flow branches several times in the longitudinal direction of the sheet steel component. A further embodiment of the forming tool according to the invention accordingly provides that at least one of the cooling duct branches of one of the tool parts communicates with a cooling duct of the next tool part, which branches into at least two further cooling duct branches within this next tool part, wherein the bore axes of these further cooling duct branches run along the Extend molding surface.

A further advantageous embodiment of the molding tool according to the invention is characterized in that the die has at least one movable bottom part. By means of the movable bottom part of the die, a more accurate positioning of the sheet metal blank to be formed with respect to the molding surfaces of the mold at the beginning and during the forming process can be achieved.

A particularly reliable leak-free sealing on the mutually facing abutting surfaces of the adjoining tool parts can be achieved according to a preferred embodiment of the invention in that the interconnected cooling channels and / or cooling channel branches of adjacent tool parts are provided with annular recesses for receiving a seal. The seal is preferably formed from a sleeve-shaped insert, in whose lateral surface at least two axially spaced annular grooves are formed, in which rubber-elastic sealing rings are arranged. The thus executed seal allows axial and / or radial displaceability of the adjoining tool parts, without causing leakage. An axial displacement of the tool parts can occur in particular due to a temperature-induced expansion or shrinkage of one or more of the tool parts. A radial displaceability is advantageous for component deviations.

Further preferred and advantageous embodiments of the molding tool according to the invention are specified in the subclaims.

Fig. 1

eine vertikale Querschnittansicht eines Abschnitts eines Formwerkzeuges zum Warmumformen und Presshärten von Metallblechen am Beginn des Umformprozesses;

Fig. 2

das Formwerkzeug der Fig. 1, wiederum in vertikaler Querschnittansicht, kurz vor Ende des Umformprozesses;

Fig. 3

das Formwerkzeug der Fig. 1 am Ende des Umformprozesses;

Fig. 4

eine Matrize eines erfindungsgemäßen Formwerkzeuges in Draufsicht;

Fig. 5

ein mit einem erfindungsgemäßen Formwerkzeug hergestelltes Bauteil;

Fig. 6

eine Kühlkanalstruktur bzw. -anordnung in einer (nicht dargestellten) Matrize gemäß Fig. 4, wobei jedoch das Bauteil gemäß Fig. 5 durch strichpunktierte Linien angedeutet ist;

Fig. 7

ein Werkzeugteil einer Matrize eines erfindungsgemäßen Formwerkzeuges; und

Fig. 8

eine Kühlkanalanordnung in einer nicht näher dargestellten Matrize, in Querschnittansicht;

Fig. 9

einen Abschnitt zweier aneinanderliegender Werkzeugteile eines erfindungsgemäßen Formwerkzeuges mit in Verbindung stehenden Kühlkanälen, in Schnittansicht; und

Fig. 10

einen Stempel eines erfindungsgemäßen Formwerkzeuges, in Seitenansicht.

The invention will be explained in more detail with reference to a drawing illustrating several embodiments. They show schematically:

Fig. 1

a vertical cross-sectional view of a portion of a mold for hot working and press hardening of metal sheets at the beginning of the forming process;

Fig. 2

the mold of the Fig. 1 again in vertical cross-sectional view, just before the end of the forming process;

Fig. 3

the mold of the Fig. 1 at the end of the forming process;

Fig. 4

a mold of a mold according to the invention in plan view;

Fig. 5

a manufactured with a mold according to the invention component;

Fig. 6

a cooling channel structure or arrangement in a (not shown) according to the die Fig. 4 However, wherein the component according to Fig. 5 indicated by dash-dotted lines;

Fig. 7

a tool part of a die of a molding tool according to the invention; and

Fig. 8

a cooling channel arrangement in a die, not shown, in cross-sectional view;

Fig. 9

a section of two adjoining tool parts of a mold according to the invention with associated cooling channels, in sectional view; and

Fig. 10

a stamp of a molding tool according to the invention, in side view.

That in the FIGS. 1 to 3 illustrated mold is used for hot forming and press hardening of sheet metal, preferably boron-alloyed steel sheet. The molding tool (pressing tool) is constructed from a punch 1 and a die 2. The punch 1 is arranged within a machine frame 5, are mounted on the upper side holder 6 for holding the shaped sheet metal blank 7.

The die 2 has a movable bottom part 2.1, which is arranged between lateral tool parts (blocks) 2.2, 2.3 of the die. In the open position of the molding tool, the movable bottom part 2.1 protrudes with its molding surface facing the stamp 1 opposite the molding surfaces of the lateral tool parts 2.2, 2.3 of the die. The movable bottom part 2.1 serves as a counter-pressure element for the punch 1 and thus optimizes by clamping the sheet metal blank whose positional fixation during the forming process.

The tool parts (blocks) 2.2, 2.3 are releasably connected to a serving as a support base part (substructure) 2.4 of the die 2. The blocks 2.2, 2.3 and the bottom part 2.1 of the die 2 and the stamp 1 have cooling channels 8, 9, 10, is passed through the cooling liquid, for example, cold water, for rapid cooling of the previously heated in a heat treatment plant austenitizing temperature sheet steel plate 7. The board holder 6 contained in the illustrated embodiment, no cooling channels. However, it is possible that in a mold according to the invention optionally also board holder 6 are used with integrated cooling channels.

In Fig. 4 a die 2 of a molding tool according to the invention is shown in plan view, by means of which from a sheet steel plate 7, an elongate molding member 7 'can be produced. The sheet metal forming component 7 'is an in Fig. 5 illustrated B-pillar of a motor vehicle body. The cross-sectional profile of the component 7 'changes over its length. It has a trough-shaped bulge 7.1, which widens gradually from the upper connection region 7.2 to the middle longitudinal section 7.3. The flanks 7.11, 7.12 of the bulge 7.1 extend from top to bottom in sections, relatively straight. At the middle length section 7.3, the flanks 7.11, 7.12 merge into mutually opposite inclined surfaces 7.4, 7.5, which delimit a constriction 7.9 of the channel-shaped bulge 7.1. Below the constriction 7.9, the flanks 7.11, 7.12 of the bulge 7.1 extend substantially parallel to one another until they finally diverge towards the lower end 7.6 of the column. The outside of the bulge 7.1 comprises two substantially planar surface areas 7.7, 7.8, which meet in the area of the constriction 7.9 at an obtuse angle.

The flanks 7.11, 7.12 of the channel-shaped bulge 7.1 of the component 7 'were formed by the forming surfaces of the lateral tool parts (blocks) 2.2, 2.3 and the substantially planar surface areas by shaping surfaces of the movable bottom part 2.1 of the die 2. The movable bottom part 2.1 of the die is designed in two parts, wherein the one movable part 2.11 is assigned to the upper outer side region 7.7 and the other movable part 2.12 to the lower outer side region 7.8 of the bulge 7.1.

As in Fig. 4 shown, on both sides of the movable floor parts 2.11, 2.12 of the die 2 are each a plurality of juxtaposed tool parts (blocks) 2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34 arranged, with the serving as a support base part 2.4 of the die. 2 are detachably connected. The releasable connection is preferably made of screw.

The tool parts 2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34 and the movable floor parts 2.11, 2.12 have bores designed as bores cooling channels 8, 9, which extend along the mold surface (see. Fig. 1 ). In Fig. 6 is the arrangement of the cooling channels of the die 2 of Fig. 4 shown without the die, wherein for clarification of the mold surfaces of the die 2 adapted course of the drilled cooling channels 8, 9 additionally the contour of the mold component (B-pillar) 7 'according to Fig. 5 drawn in dash-dotted lines.

With 13 centering mandrels of the mold are referred to penetrate the holes of the component 7 ', which were punched out of the metal plate 7 before the hot forming or press hardening.

According to the invention, a plurality of the blocks 2.23, 2.24, 2.32, 2.33 of the mold in each case at least one drilled cooling channel 9.1, which is branched within the block 2.23, 2.24, 2.32 and 2.33 in two drilled Kühlkanalzweige 9.2, 9.3, wherein the bore axes of the cooling duct branches 9.2, 9.3 extend substantially contour parallel to the adjacent molding surface of the die. The cooling channel branches 9.2, 9.3 are connected to the cooling channel 9.1 continuously connected holes. The cooling channel 9.1 and the branching off Cooling duct branches 9.2, 9.3 form a Y-shaped or fork-shaped cooling duct arrangement within the block 2.23, 2.24, 2.32 and 2.33, respectively. The bore diameters are for example 9 mm, 12 mm and 16 mm. A bored 16 mm diameter cooling duct is then divided, for example, into two drilled ducts, each having the same diameter of 12 mm, while a 12 mm diameter bored duct 9.1 is divided into two drilled ducts 9.2, 9.3 each have a diameter of 9 mm.

The cooling fluid flowing through the cooling channel 9.1 in the direction of the cooling channel branches 9.2, 9.3, typically cooling water, is subdivided into partial streams onto the cooling channel branches 9.2, 9.3. When the direction of flow is reversed, the partial flows of the cooling fluid flowing through the cooling duct branches 9.2, 9.3 are brought together in the cooling duct 9.1.

The bore axes of the outgoing from the drilled cooling channel 9.1 or merged on the cooling channel 9.1 Kühlkanalzweige 9.2, 9.3 of the respective tool part include an acute angle α, which may for example be in the range of 5 ° to 45 ° (see. Fig. 7 ). Preferably, the angle enclosed by the bore axes of the cooling channel branches 9.2, 9.3 of the respective tool part is in the range of 5 ° to 30 °.

The number of both sides of the movable floor parts 2.11, 2.12 of the die 2 arranged tool parts (blocks) 2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34 is of the shape of the manufactured component 7 ', in particular the number of Constraints 7.9 and / or widening of the Component 7 'dependent. The bore axes of the cooling channels 9, 9.1 or cooling channel branches 9.2, 9.3 follow the contour of the female mold surface or the stamp surface. The illustrated arrangement of the cooling channels 8, 9, 9.1, 10 and cooling channel branches 9.2, 9.3 within the stamp 1 or the blocks 2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34 and movable floor parts 2.11, 2.12 of Die 2 is a rapid uniform cooling of the component 7 'and thus achieved a uniform hardening during press hardening.

This in Fig. 7 shown block-shaped tool part 2.24 has in addition to a drilled, within the tool part 2.24 in two cooling channel branches 9.2, 9.3 divided cooling channel 9.1 to another cooling channel 9, which is unbranched and extending from the one connection surface 2.241 to the opposite connection surface 2.242. In Fig. 7 It can be seen that the drilled cooling channels 9, 9.1 and cooling channel branches 9.2, 9.3 run contour-parallel to the molding surface 11 of the tool part 2.24.

Furthermore, in Fig. 8 illustrated that the drilled cooling channels 9.4, 9.5 and cooling channel branches 9.2, 9.3 of the die of the mold according to the invention, even if they have different diameters d ₁ , d ₂ and d ₃ , however, each approximately at the same distance b ₁ , b ₂ and b ₃ are arranged to form surface, the latter being represented here by the profile of the manufactured component 7 '. The holes 9.1, 9.2 with the diameter d ₁ , for example, 9 mm, are each arranged with a distance b ₁ of about 10.5 mm to Matrizenformfläche, while the holes 9.4, 9.5 with the diameter d ₂ and d ₃ of, for example 12 mm each have a distance b ₂ = b ₃ of about 12 mm to Matrizenformfläche to have. Also, the radial distance a of the bore axes of the adjacent holes 9.4 is substantially equal.

In Fig. 9 Finally, an embodiment for a sealing, permeable to the coolant flow connection of the drilled cooling channels 9, 9.1 and cooling duct branches 9.2, 9.3 shown (see. Fig. 7 ). The interconnected cooling channels 9, 9.1 or cooling duct branches 9.2, 9.3 of the juxtaposed tool parts 2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34 are provided with annular recesses 14, 15 for receiving a seal. The seal is formed from a sleeve-shaped insert 16, in whose lateral surface at least two axially spaced annular grooves 17 are formed, in which rubber-elastic sealing rings 18 are arranged. The sleeve-shaped insert 16 is for example made of plastic or metal, preferably made of steel. It has substantially the same inner diameter as the holes 16 connected by the insert 16. The length of the sleeve-shaped insert 16 is greater than the bore diameter of the connected cooling channels 9, 9.1 or cooling channel branches 9.3. The length of the insert 16 is dimensioned with respect to the recesses 14, 15 so that between the end faces of the insert 16 and the faces of the recesses 14, 15 faces at least on one side a clearance (gap) is present. The game S is for example in the range of 1 to 4 mm, preferably 1 to 2 mm. In the Fig. 9 Sealing construction shown allows for a wide range of axial displacement of the tool parts 2.23, 2.24 and the insert 16 relative to each other, without causing the seal to leak. If a radial displacement is to be enabled, the Outer diameter of the insert 16 smaller than the diameter of the recesses 14, 15 to choose.

In Fig. 10 a stamp 1 of the molding tool according to the invention is shown. It can be seen that a plurality of tool parts 1.11, 1.12, 1.13, 1.14, 1.15, 1.16 are mounted to one another on a stamp substructure 1.2. The tool parts 1.11, 1.12, 1.13, 1.14, 1.15, 1.16 of the punch 1 have according to the tool parts 2.23, 2.24 of the die 2 drilled cooling channels, which extend along the molding surface, wherein at least two of the tool parts 1.11, 1.12, 1.13, 1.14, 1.15, 1.16 in turn each have at least one within the tool part in at least two cooling channel branches 9.2, 9.3 branching cooling channel 9.1, and wherein the bore axes of the cooling channel branches 9.2, 9.3 extend along the molding surface.

The leak-free sealing of the tool parts 1.11, 1.12, 1.13, 1.14, 1.15, 1.16 of the punch 1 is as in the tool parts 2.23, 2.24 of the die 2 accordingly Fig. 9 executed.

Claims (12)

1. A forming tool for hot forming sheet metal, in particular for press-hardening sheet metal, comprising a plurality of tool elements (2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34) which rest against one another and which define a forming surface, wherein the forming surface is embodied so as to be complementary to at least one section of a formed sheet component (7'), which is to be produced by means of hot forming, and wherein the tool elements (2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34) comprise cooling ducts (9, 9.1, 9.2, 9.3) in the form of bores which extend along the forming surface, characterized in that at least two of the tool elements (2.23, 2.24) in each case comprise at least one cooling duct (9.1) which branches within the tool element (2.23, 2.24) into at least two cooling duct branches (9.2, 9.3), wherein the bore axes of the cooling duct branches (9.2, 9.3) extend along the forming surface (11).
2. The forming tool according to claim 1, characterized in that the sum of the clear cross sectional surfaces of the at least two cooling duct branches (9.2, 9.3) lies in the range of 1-time to 1.3-times, preferably in the range of 1-time to 1.2-times the clear cross sectional surface of the branching cooling duct (9.1).
3. The forming tool according to claim 1 or 2, characterized in that the shortest radial distance of the respective cooling duct branch (9.2) from the forming surface (11) equals the shortest radial distance of a further (9.3) one of the at least two cooling duct branches (9.2, 9.3) or differs therefrom by not more than 20%, preferably by not more than 10%.
4. The forming tool according to one of claims 1 to 3, characterized in that the shortest radial distance of the respective branching cooling duct (9, 9.1) from the forming surface (11,12) equals the shortest radial distance of one of the at least two cooling duct branches (9.2, 9.3) or differs therefrom by not more than 20%, preferably by not more than 10%.
5. The forming tool according to one of claims 1 to 4, characterized in that the shortest radial distance of the respective cooling duct branch (9.2, 9.3) and/or of the branching cooling duct (9.1) from the forming surface (11,12) of the tool element (2.24) lies in the range of 0.5 to 1.2-times the diameter of the respective cooling duct branch (9.2, 9.3) or of the branching cooling duct (9.1).
6. The forming tool according to one of claims 1 to 5, characterized in that at least one of the cooling duct branches of one of the tool elements (2.21, 2.22, 2.23, 2.24, 2.25, 2.31, 2.32, 2.33, 2.34) is connected to a cooling duct of the next tool element, which branches within this next tool element in at least two further cooling duct branches, wherein the bore axes of these further cooling duct branches extend along the forming surface.
7. The forming tool according to one of claims 1 to 6, characterized in that the cooling ducts (8, 9, 9.1, 10), which are connected to one another, of the tool elements (2.23, 2.24), which rest against one another, and/or the cooling duct branches (9.2, 9.3), which are connected to one another, of the tool elements (2.23, 2.24), which rest against one another, are provided with annular recesses (14, 15) for accommodating a seal (16, 18).
8. The forming tool according to claim 7, characterized in that the seal is formed from a sleeve-shaped insert (16), in the lateral surface of which at least two annular grooves (17), which are axially spaced apart from one another, are embodied, in which rubbery-elastic sealing rings (18) are arranged.
9. The forming tool according to claim 7 or 8, characterized in that the seal (16, 18) allows for an axial and/or radial displaceability of the tool elements (2.23, 2.24), which rest against one another.
10. The forming tool according to one of claims 1 to 9, characterized in that it comprises a female mold (2) which comprises at least one movable base part (2.1; 2.11, 2.12).
11. The forming tool according to claim 10, characterized in that at least two of the tool elements (2.23, 2.24, 2.32, 2.33), which in each case comprise at least one cooling duct (9.1) which branches within the tool element into at least two cooling duct branches (9.2, 9.3) are detachably connected to a base part (2.4) of the female mold (2), which serves as a support.
12. The forming tool according to claim 10 or 11, characterized in that it comprises a male mold (1), wherein at least two of the tool elements (1.11, 1.12, 1.13, 1.14, 1.15, 1.16) which in each case comprise at least one cooling duct which branches within the tool element into at least two cooling duct branches, are detachably connected to a base part (1.2) of the male mold (1) which serves as a support.

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