EP2851138B1 - Partially cooled hot forming tool - Google Patents

Description

The present invention relates to a hot forming tool for hot forming and press hardening of metallic steel components according to the features in the preamble of claim 1.

The present invention further relates to a deep drawing tool for hot forming and optional press hardening of metallic steel components according to the features in the preamble of claim 2.

From the prior art, it is known to deform sheet metal blanks, in particular from sheet steel by a forming process such that a three-dimensional sheet metal component is produced. Such sheet metal components are used in particular in the automotive industry for the production of body parts. However, sheet metal components are also used in other applications, in particular in a motor vehicle, e.g. in motor vehicle drivers or even housing components.

In the course of the demand for a lower consumption of motor vehicles, but at the same time increased rigidity of the body is required, high-strength and ultra-high-strength steel materials have been developed. These are steel alloys that are heated to temperatures above the AC3 point, are hot formed, and then cooled down so fast that a substantially martensitic structure is produced and thus high-strength or ultra-high-strength properties are set in the steel component. This process is also known as hot forming and press hardening.

The heating was usually carried out in an oven, in particular in a continuous furnace or even on a tempering, then the heated board is transferred to a thermoforming tool and formed in a warm state. Combined thermoforming and press-hardening tools now have a possibility of cooling the blank formed in the hot state and held between the upper tool and lower tool of the hot-forming tool. For this purpose, cooling channels are usually provided in the thermoforming mold, through which a corresponding cooling medium is passed, in order thus to achieve the desired cooling rate.

The tool steel used, from which the upper tool or the lower tool are usually made, is expensive to purchase due to its material properties and also difficult to machine due to its high strength.

From the DE 10 2009 058 657 A1 For this purpose, for example, a hot forming and press hardening tool is known, in which a base body is formed of light metal and is covered with a wear protection plate, so that a hot forming and press hardening tool is less expensive to produce.

From the DE 10 2010 027 554 A1 as well as the DE 10 2011 108 912 A1 Hot forming and press hardening tools are known in which at least one upper tool and / or one lower tool are formed segmented. When carrying out the press hardening process, at least one segment is moved away from the sheet-metal forming component, so that non-contact contact results in dissimilar heat dissipation.

The object of the present invention is to provide, starting from the prior art, a thermoforming and optional press-hardening tool which is inexpensive to manufacture and subject to little tool wear, and at the same time optionally provides effective cooling performance and offers the possibility of partial removal set different strength ranges in the press-hardened component sharply bordered.

The aforementioned object is achieved with a hot forming tool for hot forming and press hardening of steel components according to the features in claim 1.

The aforementioned object is achieved according to the invention alternatively with a thermoforming tool for hot forming and optional press hardening of steel components according to the features in claim 2.

Advantageous embodiments of the present invention are the subject of the dependent claims.

The hot forming tool for thermoforming and press hardening of steel components has an upper tool and a lower tool, wherein the upper tool and / or the lower tool is formed of a cooling body having basic body, wherein the main body itself in turn consists of a highly heat conductive material and on the body a wear protection board is arranged , According to the invention, the thermoforming mold is characterized in that the base body is formed from at least two segments.

The thermoforming tool is thus preferably used to produce motor vehicle components, for example A, B, C or D pillars or also transmission tunnels or also motor vehicle outer skin components such as bonnets or motor vehicle doors in the forming process. For this purpose, preferably an upper tool can be lowered onto a lower tool, wherein a mold cavity remains between the upper tool and lower tool when the hot forming tool is closed. The mold cavity then has a thickness which substantially corresponds to the sheet thickness of the sheet metal component to be formed. Particularly preferably, both the upper tool and the lower tool thus consist of a base body of hochwärmeleitfähigem material, which are coated in each case in the workpiece to be formed with a wear protection board. In the context of the invention, however, only the upper tool or only the lower tool as described above be prepared. The highly heat-conductive material is formed in particular from a light metal alloy, in particular from an aluminum alloy.

An alternative embodiment variant of the present invention is a thermoforming tool for hot forming and optional press hardening of steel components, wherein the thermoforming tool has an upper tool, a lower tool and a hold-down, characterized in that the upper tool and / or the lower tool are each formed of a base body made of a light metal alloy and a wear protection plate is arranged on the base body and that the base body is formed from at least two segments, wherein the base body has cooling channels in at least one segment and is formed from a highly thermally conductive material and then the respective wear protection plate is arranged on the segments.

This has the advantage that not only the pure press forming, but also the deep drawing with a cost-effective tool to produce is feasible. The base body may initially be formed of a material that is easy to machine, in particular, by machining, preferably a light metal alloy. On this body, a wear protection board is then provided, which is formed from a relation to the material of the body more solid material, in particular a tool steel. Preferably, the wear protection board is formed replaceable. In the context of the invention thus there is the possibility to produce a low-cost thermoforming tool, which also requires low maintenance costs in use, since when reaching a wear limit sometimes only the wear protection board must be replaced. This is preferably screwed to the base body and / or glued.

Optionally, the deep-drawing tool on a base body, which is formed segmented, in which case particularly preferably run in at least one segment cooling channels and the base body is formed of a highly heat conductive material. This results in the possibility of the thermoforming component in particular with executed after the hot forming press hardening can be produced from each different strength ranges. The different strength ranges are formed by different cooling rates and / or cooling temperatures corresponding to the respective segment. Due to the fact that the segments are physically separated from one another and thus thermally separated, it is possible to set the strength ranges in a targeted manner. Due to the high thermal conductivity of the material of the body is also recorded in conjunction with the cooling channels high heat dissipation. This also taking into account that the cooling channels are formed in particular as a straight through hole and sometimes a greater distance to the cooled workpiece between the cooling channel and the mold surface of the wear protection board is present. By the cooling channel bore in particular as a straight through holes, it is again possible to reduce the manufacturing cost of the tool, in particular the respective body, as can be dispensed with a complex branched channel system.

The properties described further apply to both the thermoforming tool and the thermoforming tool, which is why in the claims both the thermoforming tool and the thermoforming tool are referred to below as a tool. If a feature for the thermoforming tool is described below, it also applies to the thermoforming tool.

According to the invention it is now provided that the base body is formed at least two parts. The main body is thereby divided into segments, so that individual segments are particularly preferably separated from one another via a parting line. The parting line may be formed in the form of a gap, in the parting line, for example, an insulating material may be arranged or the parting line may also be formed approximately gap-free, but in particular between the individual segments, a heat conduction greatly reduced or avoided. This makes it possible to temper the two segments of the base body different from each other, so that different strength properties can be adjusted by the cooling of the component in a sharply bordered transition area. In particular, transition regions of less than 100 mm, preferably less than 80 mm, in particular less than 50 mm and most preferably less than 30 mm are set in the component.

The individual segments of the base body have cooling channels, wherein the cooling channels are produced according to the invention as through holes. This offers the advantage that first of all the base body is produced as a light metal alloy by casting or else with a machining production method. The material costs and the processing or manufacturing costs are comparatively low failing compared to a Grundköper made of tool steel, in which case the possibility of introducing the cooling channels is also inexpensive to carry out. For this purpose, machining methods, such as a drilling or milling method can be used, which can be dispensed with a complex channel system. In particular, the cooling channels from one side of the base body are designed to pass through the same to the other side as a through-bore, since sufficient heat dissipation is achieved on account of the high heat conduction properties of the main body or of the respective segment. At the same time, due to the parting line between two segments, it is ensured that each segment reaches its individual desired temperature, in particular with regard to the quenching behavior during the press hardening process. Thus, the creation of the cooling channels is particularly cost possible, which in turn turn out the total tooling costs significantly lower than in a made of conventional tool steel hot forming tool.

Cooling media used are, in particular, fluid media, that is to say cooling fluids which, in the simplest embodiment variant, can also be formed from water, since the use of light metal alloys results in a lower susceptibility to corrosion compared with steel materials. Furthermore, however, air or compressed air or other gaseous media can be used as the cooling medium. Furthermore, it is possible within the scope of the invention to set the cooling rate required individually for the area of the component by size, thus cross-sectional area of the cooling channel and / or pressure of the cooling medium and / or the flow velocity of the cooling medium through a respective segment. In particular, the adjustment of a tensile strength is alloy-dependent in regions between 1,500 and 2,000 MPa and, in contrast, regionally between 750 and 1,050 MPa possible. Thus, it is possible according to the invention in the two adjacent segments each of the upper tool and / or the lower tool from each other to set different cooling rates and thus strength properties in the component.

The wear protection plates themselves are in turn preferably formed from a high-strength or ultra-high-strength steel material. The wear protection boards are arranged in particular on the base body of the thermoforming tool that they are easily interchangeable after a certain production time, so that the dimensional stability of the components produced therewith is given, but not the entire upper tool or lower tool or the entire thermoforming tool replaced or completely must be revised.

For this purpose, the wear protection boards are particularly preferably interchangeable or releasably coupled to the main body or the segments of the base body. In particular, a Verschließschutzplatine thus bonded to the body and / or positively coupled, in particular by a rivet or screw. Further preferably, a thermal compound between the wear plate and body is arranged so that an intense heat transfer occurs by conduction and the hot-formed component can be purposefully quenched.

In a further preferred embodiment of the present invention, not only the main body are segmented, with a continuous wear protection board, but the wear protection boards are also segmented. This makes it possible on the one hand even more sharply to the transition region in the component, which is produced due to the different tempered quenching, on the other hand it is possible just in conjunction with thickness jumps of the board and thus the forming and hardening of Tayloredmaterial by the segmented wear protection boards to enter the respective thickness of the sheet metal blank, so that a corresponding mold cavity is made. Preferably, therefore, in turn, a parting line is formed between the individual wear protection board segments, the may have a gap, or is formed approximately gap-free, with an insulating material in the parting line can be used.

Particularly preferably, the wear protection plate at the edge regions of the body at least partially formed encompassing and converted in particular in the edge region, so that the main body is overlapped on the edge side by the wear protection board. This variant is to be understood both peripherally at least in sections circumferentially, but also, for example, completely circumferential edge. By embracing the edge, on the one hand, a secure positive fixing of the position of the wear protection plate on the base body, in particular in the horizontal direction, is achieved. However, it is further ensured in particular for the thermoforming tool that a lateral stripping or overlapping of the reshaped board does not lead to damage in the edge region between the wear protection plate and the base body, so that no possibly unwanted lifting the wear protection plate of the main body is caused by tilting or the like.

Furthermore, particularly preferably, a hold-down device is arranged on the deep-drawing tool on at least two opposite sides. The hold-down device can either be formed on both sides, so that it is completely arranged next to the upper tool or the lower tool and is preferably movable separately to both upper tool and lower tool. Alternatively, the hold-down can also be designed such that it is formed only on one side, for example coming from the lower tool or coming from the upper tool and then coming umzuformende board clamped on the upper tool or on the lower tool to the plant. Again, the hold-down is preferably formed separately movable both to the upper tool and the lower tool.

Figur 1a und b

einen Querschnitt und einen Längsschnitt durch ein erfindungsgemäßes Warmformwerkzeug,

Figur 2a und b

einen Querschnitt und einen Längsschnitt durch eine alternative Ausführungsvariante eines erfindungsgemäßen Warmformwerkzeuges,

Figur 3a und b

einen Querschnitt und einen Längsschnitt durch eine alternative Ausführungsvariante eines erfindungsgemäßen Warmformwerkzeuges zum Umformen von Taylored Blanks,

Figur 4a und b

eine alternative Ausführungsvariante mit segmentierten Verschleißschutzplatinen,

Figur 5a und b

eine alternative Ausführungsvariante zur Herstellung eines Taylored Blanks,

Figur 6a und b

eine alternative Ausführungsvariante mit Durchgangsöffnung in der Verschleißschutzplatine,

Figur 7a und b

eine alternative Ausführungsvariante mit passiv gekühltem Grundkörper,

Figur 8a und b

eine alternative Ausführungsvariante mit passiv gekühltem Grundkörper,

Figur 9a und b

eine alternative Ausführungsvariante mit passiv gekühltem Grundkörper,

Figur 10

eine Längsschnittansicht zu Figur 9,

Figur 11a und b

eine erste Ausgestaltungsvariante eines erfindungsgemäßen Tiefziehwerkzeuges mit einem einseitigen Niederhalter,

Figur 12a und b

eine zweite Ausgestaltungsvariante eines erfindungsgemäßen Tiefziehwerkzeuges mit beiderseitigem Niederhalter und

Figur 13a und b

eine dritte Ausgestaltungsvariante eines erfindungsgemäßen Tiefziehwerkzeuges in Quer- und Längsschnittansicht.

Further advantages, preferred features, characteristics and aspects of the present invention are the subject of the following description. Preferred embodiments are shown in the schematic figures. These are for easy understanding of the invention. Show it:

FIGS. 1a and b

a cross section and a longitudinal section through an inventive thermoforming tool,

FIGS. 2a and b

a cross section and a longitudinal section through an alternative embodiment of a thermoforming tool according to the invention,

FIG. 3a and b

a cross section and a longitudinal section through an alternative embodiment of a hot forming tool according to the invention for forming Taylored blanks,

FIGS. 4a and b

an alternative embodiment with segmented wear protection boards,

FIG. 5a and b

an alternative embodiment for producing a Taylored blanks,

FIGS. 6a and b

an alternative embodiment with through-hole in the wear protection board,

FIGS. 7a and b

an alternative embodiment variant with passively cooled base body,

FIGS. 8a and b

an alternative embodiment variant with passively cooled base body,

FIGS. 9a and b

an alternative embodiment variant with passively cooled base body,

FIG. 10

a longitudinal sectional view to FIG. 9 .

FIGS. 11a and b

a first embodiment variant of a deep-drawing tool according to the invention with a one-sided hold-down,

FIGS. 12a and b

a second embodiment variant of a deep-drawing tool according to the invention with mutual hold-down and

FIGS. 13a and b

a third embodiment variant of a thermoforming tool according to the invention in transverse and longitudinal sectional view.

In the figures, the same reference numerals are used for the same or similar components, even if a repeated description is omitted for reasons of simplicity.

FIGS. 1a and b show an inventive thermoforming tool 1 in the case of FIG. 1a in a cross-sectional view and FIG. 1b in a longitudinal section view. The thermoforming tool 1 has an upper tool 2 and a lower tool 3, wherein the upper tool 2 and the lower tool 3 are each formed from a base body 4, 5 and anti-wear plates 6, 7 arranged thereon. In the cross-sectional view according to FIG. 1a It can be seen that both in the lower tool 3 and in the upper tool 2, a cooling channel 8 is arranged, which extends close below the wear protection plate 6 through the base body 4.

In FIG. 1b Now the core of the invention can be seen. Both the lower tool 3 and upper tool 2 are each divided into three segments 9a, 9b, 9c, 10a, 10b, 10c. Between the individual segments 9a, 9b, 9c, 10a, 10b, 10c are parting lines 11, here in the form of a gap. In the joints 11 itself can also be arranged an insulating material. This avoids that a heat conduction below the segments 9a, 9b, 9c, 10a, 10b, 10c takes place. Furthermore, it can be seen that in this embodiment, the cooling channel 8 only through the respective middle segment 9b, 10b run. Thus, in this embodiment variant, the central segment 9b, 10b can be cooled both in the upper tool and in the lower tool 3, so that a corresponding homogeneous heat dissipation of an upper tool 2 and a lower tool 3 takes place only in the area of the component, which is not shown in detail. The areas adjacent thereto, which are located in the segments 9a, 9c, 10a, 10c, are not detected by the cooling in this case. The wear protection plate 6, 7 is continuous, wherein due to the parting line 11 between the segments 9a, 9b, 9c, 10a, 10b, 10c each inhibit a corresponding heat conduction becomes. It therefore arises on the component a not shown sharp-edged transition region.

FIGS. 2a and b show an alternative embodiment, in which case the coolant supply and removal are formed by the cooling channels 8 in the form of through holes 12. As a result, it is possible as an advantage essential to the invention that the through-holes 12, for example, be easily introduced into a base body blank by a machining drilling process. Alternatively, it is also possible to pour pipes in a Grundköper. The through holes 12 thus no longer run in the immediate vicinity of the wear protection plate 6, 7, which, however, at most in negligible manner makes noticeable due to the high thermal conductivity of the material of the body. The advantage of saving in the manufacturing cost of the component outweighs.

FIG. 3 shows a further alternative embodiment of the inventive thermoforming tool 1. Here, the wear protection board 6, 7 is formed both on the upper tool 2 and on the lower tool 3 with a respective thick area 13 and with a thin region 14. This makes it possible to produce an increased surface pressure on the component to be formed when the thermoforming tool 1 is closed in the thick area 13, whereby a correspondingly high heat dissipation is ensured. Air gaps between the component to be formed and the wear protection plate selectively remain in the thin region 14, so that a lower heat dissipation takes place here.

FIG. 4 shows a further alternative embodiment of the present invention. In this case, the wear protection plate 6, 7 is segmented corresponding to the underlying base body, so that individual wear protection board segments 6a, 6b, 6c, 7a, 7b, 7c are formed. Between the wear protection board segments 6a, 6b, 6c, 7a, 7b, 7c, a parting line 15 is formed which prevents heat conduction from one wear protection board segment into the other wear protection board segment. Alternatively and / or in addition to those already out FIG. 1 known cooling channels 8 heating elements 16, for example in the form of heating cartridges in 9a, 9c, 10a, 10c provided to keep targeted partial areas at a temperature. Also, an insulating layer 17 is shown between the individual segments.

The individual features described above, as well as the further described features of each figure representation can be combined with each other within the scope of the invention, without departing from the scope of the invention.

FIG. 5a and b shows a further alternative embodiment of the present invention, in which case a Taylored blank 18 is formed with a thermoforming tool 1 according to the invention. For this purpose, the upper wear protection plate 6 and the lower wear protection plate 7 according to corresponding projections 19, so that follow the contour of the Taylored blanks 18 of the resulting mold cavity with closed thermoforming mold 1 to the contour of the Taylored blank 18. Further shown in FIG FIG. 5b in that the wear protection plates 6, 7 have different thicknesses D1, D2 from one another. The thickness D1 is smaller than the thickness D2.

FIG. 6 shows the embodiment variant FIG. 4 , wherein in the wear protection plate 6, 7, openings 20 are provided, through which the formed component, for example, subsequently or in the thermoforming tool can be perforated.

In the case of the subsequent perforation, the opening causes a reduced heat dissipation, cooling rate and thus strength in this section, whereby the perforation with relatively little force, tool wear and without risk of microcracking is possible.

FIGS. 7a and b show a further alternative embodiment in which not the segments of the body are directly and actively cooled, but in each case a bottom plate 21 is connected, wherein in the bottom plate 21, a plurality of cooling channels 8 is formed. The heat is thus removed via the wear protection plates 6, 7 through the base body 4, 5 and the bottom plate 21. Due to the high thermal conductivity of the base body 4, 5, it is again possible to realize a corresponding heat dissipation.

FIGS. 8a and b Here, the individual segments 9a, 9b, 9c, 10a, 10b, 10c of upper tool 2 and lower tool 3 are each arranged on a base plate 21, wherein the segments 9a, 9b, 9c, 10a, 10b, 10c for heat dissipation in relation to the bottom plate 21 have an approximately constant or even reduced volume ratio. Thus, according to the invention, it is provided that the individual segments 9a, 9b, 9c, 10a, 10b, 10c preferably ensure the heat dissipation from the wear protection plate 6 in their main function from a material having good thermal conductivity. Furthermore, it is possible for the segments 9a, 9b, 9c, 10a, 10b, 10c to produce the contour in a particularly simple manner and then to provide a correspondingly cost-effectively produced forming tool 1 in conjunction with the wear protection plate 4. By the respective bottom plate 21 in turn the tool 1 is given the necessary rigidity for applying the forming forces. Again shown are in particular in the central segment 9b, 10b, the cooling channels 8 in the form of straight through holes 12. As an alternative, pipes can be poured into the segment 9b, 10b in the production.

FIGS. 9a and b shows a further alternative embodiment of the hot forming tool according to the invention 1. Here, in some segments 9a, 9c, 10a, 10c heating elements 16 are provided and a correspondingly solid bottom plate 21 on the upper tool 2, but also on the lower tool 3. In addition to those already shown above Embodiment variants is in the embodiment according to FIG. 9a the cooling channel 8, which is arranged in particular in the middle segment, connected to a central cooling channel 22, so that in each case a cooling medium is introduced into the bottom plate 21 via the central cooling channel 22, wherein the segment 9a, 9b, 9c of the upper tool 2 or but the lower tool 3 this refers to the cooling medium from the central cooling channel 22.

FIG. 10 shows a plan view of a bottom plate 21 with disposed thereon segments 10a, 10b, 10c of the lower tool 3. The hot area and the cold area are separated by a parting line 11. Not shown is the Wear protection plate 6. The segments can be coupled to the bottom plate 21 positively and / or non-positively and / or cohesively.

FIGS. 11a and b show a first embodiment variant of a thermoforming tool 23 according to the invention in a transverse and longitudinal sectional view. Again, in turn, the upper tool 2 and the lower tool 3 is formed with an additionally coupled to the lower tool 3 and relatively movable to this arranged hold-down 24 or blank holder. The hold-down 24 is the board, not shown, by clamping on the upper tool 2 to the plant brought. On the main body 4 of the upper tool 2 and the main body 5 of the lower tool 3, a wear protection plate 7 is arranged in each case. Furthermore, 3 cooling channels in the form of through holes 12 are formed in the upper tool 2 and the lower tool, so that the deformed component is completed even after completion of the deep-drawing process. Further shown in FIG FIG. 11b Here, it can be seen that the main body 4 of the upper tool 2 and the main body 5 of the lower tool 3 in each case three segments 9a, 9b, 9c, 10a, 10b, 10c is divided. The segments 9a, 9b, 9c, 10a, 10b, 10c themselves are separated from each other to form a parting line 11. The segments 9b and 9c of the upper tool 2 and the segments 10b and 10c of the lower tool 3 have through holes 12, the segment 9a and the segment 10a of upper tool 2 and lower tool 3 have no cooling channels.

Further shown in FIG FIGS. 12a and b an alternative embodiment variant of the thermoforming tool, in which it can be seen that according to FIG. 12a a sheet metal blank 25 to be formed is clamped between a blank holder 24 formed of an upper hold-down portion 24a and a lower hold-down portion 24b. Again, the hold-down 24 is again movable separately to both upper tool 2 and lower tool 3. Furthermore, it is shown that the wear protection plate 6 of both the upper tool 2 and the wear protection plate 7 of the lower tool 3, the base body 4, 5 is formed on opposite sides edge-wise sections in the form. In particular, based on the horizontal direction H thus an additional lateral fixation is achieved and based on the Pressenhubrichtung or

Vertical direction V no slipping of the board on the edge rearranged area of the wear plates 6, 7 allows. The wear protection boards 6, 7 thus comprise at the edge the respective base body 4, 5 on two opposite sides.

FIG. 12b shows a longitudinal sectional view, from which it is clearly seen that only the segment 9b and 10b cooling channels in the form of through holes 12, whereas the segments 9a, 9c and 10a and 10c are formed of a material different from the material of the segment 10b material. For example, the material of the segments 9a, 9c, 10a, 10c here have a lower thermal conductivity, compared to the material of the segments 9b and 10b. In this way, in particular taking into account the thermal separation due to the parting line 11 of the individual segments 9a, 9b, 9c, 10a, 10b, 10c with each other, it allows a significantly lower heat dissipation in the segments 9a, 9c, 10a, 10c. The wear protection boards 6, 7 comprise according to longitudinal section of FIG. 12b the basic body 4, 5 not. However, this would also be conceivable within the scope of the invention, so that a complete bordering is made possible.

FIGS. 13a and 13b show a third embodiment variant of a thermoforming tool according to the invention 23 in transverse and longitudinal sectional view. Again, in turn, the upper tool 2 and the lower tool 3 is formed with an additionally coupled to the lower tool 3 and relatively movable to this arranged hold-down 24 or blank holder. The hold-down 24 is the non-illustrated board clamped to the wear protection plate 6 of the upper tool 2 brought to bear. On the main body 4 of the upper tool 2 and the main body 5 of the lower tool 3, a wear protection plate 7 is arranged in each case. Furthermore, 3 cooling channels in the form of through holes 12 are formed in the upper tool 2 and the lower tool, so that the deformed component is completed even after completion of the deep-drawing process. Further shown in FIG FIG. 13b Here, it can be seen that the main body 4 of the upper tool 2 and the main body 5 of the lower tool 3 in each case three segments 9a, 9b, 9c, 10a, 10b, 10c is divided. The segments 9a, 9b, 9c, 10a, 10b, 10c themselves are in contrast to the variants of the FIGS. 11a and 11 b separated without joints. The segments 9a, 9b and 9c of the upper tool 2 and the segments 10a, 10b and 10c of the lower tool 3 have through holes 12 for cooling the deep-drawing tool 23 and thus of the (not shown) steel sheet component.

Reference numerals:

1 -

Thermoforming tool

2 -

upper tool

3 -

lower tool

4 -

Basic body to 2

5 -

Basic body to 3

6 -

Wear protection board to 4

6a -

Wear protection platinum segment

6b -

Wear protection platinum segment

6c -

Wear protection platinum segment

7 -

Wear protection board to 5

7a -

Wear protection platinum segment

7b -

Wear protection platinum segment

7c -

Wear protection platinum segment

8th -

cooling channel

9a -

Segments to 2

9b -

Segments to 2

9c -

Segments to 2

10a -

Segments to 3

10b -

Segments to 3

10c -

Segments to 3

11 -

parting line

12 -

Through Hole

13 -

thickness range

14 -

thin section

15 -

parting line

16 -

heating element

17 -

insulating

18 -

Tayloredblank

19 -

head Start

20 -

opening

21 -

baseplate

22 -

central cooling channel

23 -

Thermoforming mold

24 -

Stripper plate

24a -

upper hold-down

24b -

lower hold-down

25 -

sheet metal blank

D1 -

thickness

D2 -

thickness

H -

Horizontal direction

V -

vertical direction

Claims (13)

1. Tool for hot forming and press hardening of steel components, comprising an upper tool (2) and a lower tool (3), wherein the upper tool (2) and/or the lower tool (3) are formed from a base body (4, 5) having cooling channels (8) made from a highly thermally conductive material and a wear protection plate (6, 7) is arranged on the base body (4, 5), characterised in that the base body (4, 5) is formed from at least two segments (9a, 9b, 9c, 10a, 10b, 10c).
2. Deep drawing tool for hot forming and optional press hardening of steel components, having an upper tool (2), a lower tool (3) and a holding-down clamp (24), wherein the upper tool (2) and/or the lower tool (3) are formed from each base body (4, 5), wherein the base body (4, 5) is formed from at least two segments (9a, 9b, 9c, 10a, 10b, 10c), and wherein the base body (4, 5) has cooling channels (8) in at least one segment (9a, 9b, 9c, 10a, 10b, 10c), characterised in that the base body (4, 5) is formed from a light metal alloy, that a wear protection plate (6, 7) is arranged on the base body (4, 5), which is arranged on the segments of the base body (4, 5), and that the base body (4, 5) is formed from a highly thermally conductive material.
3. Tool according to claim 1 or 2, characterised in that the base body (4, 5) is formed from a light metal alloy, preferably from an aluminium alloy, in particular at least one segment (9a, 9b, 9c, 10a, 10b, 10c) is formed from a light metal alloy.
4. Tool according to any one of the preceding claims, characterised in that in the base body (4, 5) cooling channels (8) are formed as through bores (12) reaching through the base body (4, 5), in particular the through bore (12) is formed running linearly.
5. Tool according to any one of the preceding claims, characterised in that the segments (9a, 9b, 9c, 10a, 10b, 10c) are temperature-controllable, in particular coolable differently from each other, preferably heating elements are provided in at least one segment (9a, 9b, 9c, 10a, 10b, 10c).
6. Tool according to any one of the preceding claims, characterised in that a joint (11) of the segments (9a, 9b, 9c, 10a, 10b, 10c) is arranged orthogonal to the wear protection plate (6, 7).
7. Tool according to any one of the preceding claims, characterised in that an insulating material (17) is arranged between the segments (9a, 9b, 9c, 10a, 10b, 10c).
8. Tool according to any one of the preceding claims, characterised in that the wear protection plate (6, 7) is formed from a high-strength or ultra-high-strength steel material.
9. Tool according to any one of the preceding claims, characterised in that the wear protection plate (6, 7) is cemented and/or is positively coupled on the base body (4, 5), in particular a heat-conducting paste is arranged between wear protection plate (6, 7) and base body (4, 5).
10. Tool according to any one of the preceding claims, characterised in that the wear protection plate (6, 7) is divided into at least two wear protection plate segments (6a, 6b, 6c, 7a, 7b, 7c)), wherein between the wear protection plate segments (6a, 6b, 6c, 7a, 7b, 7c) a joint (11) is formed and/or the wear protection plate segments (6a, 6b, 6c, 7a, 7b, 7c) have a different thickness (D1, D2) from each other.
11. Tool according to any one of the preceding claims, characterised in that the wear protection plate (6, 7) overlaps the base body (4, 5) at the edge areas at least in sections and in particular is adapted in the edge area, so that the base body (4, 5) is overlapped at the edge side.
12. Tool according to any one of Claims 2 to 11, characterised in that the holding-down clamp (24) is arranged on the two opposite sides, wherein the holding-down clamp (24) is movable separately from the upper tool (2) and/or the lower tool (3) and on the wear protection plate of the lower tool (3) or the wear protection plate of the upper tool (2) comes in contact with a plate to be formed located in between them.
13. Tool according to any one of claims 2 to 11, characterised in that the holding-down clamp (24) is formed from an upper part (24a) and a lower part (24b), both of which are arranged next to the upper tool (2) and the lower tool (3) and preferably are movable separately in relation to the latter.

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