Tailored blank and side-panel reinforcement

Abstract

The invention relates to a tailored blank (H, H') for producing a press-hardened side-panel reinforcement (10, 10'), as well as to a press-hardened side-panel reinforcement (10, 10').

Description

[0001] Tailor-made semi-finished product and sidewall reinforcement

[0002] The invention relates to a tailor-made semi-finished product for the production of a hot-press hardened sidewall reinforcement and a hot-press hardened outer sidewall reinforcement.

[0003] Passive vehicle safety is a crucial requirement for vehicles. It is significantly influenced by the structural behavior of the body in the event of a crash. Depending on the load case, the requirements for structural components vary significantly from place to place. When designing appropriate solutions, the goal of lightweight construction and thus the lowest possible use of materials must always be considered.

[0004] Furthermore, torsional rigidity is an important factor for the driving safety and comfort of a motor vehicle. It describes the resistance of a body to deformation caused by external influences such as road surface irregularities, cornering, or even accidents.

[0005] Torsional rigidity depends on the materials used, their thickness, and the body's construction. Car bodies with conventional construction generally achieve high torsional rigidity. With conventional construction, areas are created in the body's nodes that act like bulkheads and contribute significantly to the body's torsional rigidity.

[0006] Tailor-made semi-finished products are well-known in the art and are referred to in the technical world as "tailored blanks" or "tailored welded blanks" for sheet metal. They have the advantage that they can be further processed into components, particularly vehicle components, that, unlike monolithic materials, exhibit properties that can be individually and tailored to specific needs. For example, at least two identical materials with different thicknesses, as well as dissimilar materials, can be joined together.

[0007] An integrated alternative to conventional body construction is the use of (complete) side panels. A highly effective solution is the application of tailored blank technology. After manufacturing a tailored blank, only one component needs to be handled, combining the functions of several components. This combination of components leads to different requirements in the individual areas of a tailored blank. Areas with different strength, ductility, surface finish, and material thickness are required.

[0008] Sidewalls for motor vehicles, especially cars, today comprise at least one sidewall reinforcement, whereby an inner and an outer sidewall reinforcement may be used, and an outer skin that seals the sidewall reinforcement(s) to the outside. The outer sidewall reinforcement may be provided from a generic semi-finished product for hot pressing, see, for example, WO 2022 / 064331 A1. Here, additional patches are applied locally to the semi-finished product to optimize the strength and thickness distribution and / or to reinforce weld seams. Comparable approaches are disclosed in publications CN 113 664 470 A and CN 115 071 845 A.

[0009] Based on this, it is the object of the present invention to provide a tailor-made semi-finished product with which a hot-press hardened sidewall reinforcement can be produced with improved torsional rigidity and / or crash performance compared to the prior art.

[0010] The stated object for a generic semi-finished product for producing a hot-press-hardened sidewall reinforcement is achieved in that the tailor-made semi-finished product comprises several blanks with different steel compositions, different surface coatings and / or different thicknesses, which are materially bonded to one another, wherein the blanks in the hot-press-hardened state result in a sidewall reinforcement with an A-pillar, a B-pillar, optionally a C-pillar, a roof rack and a sill, optionally a front longitudinal member, wherein at least one first blank is made of a steel material which, in the hot-press-hardened state, has a tensile strength of greater than 1700 to 2200 MPa, wherein at least one second blank is made of a steel material which, in the hot-press-hardened state, has a tensile strength of greater than 1400 to a maximum of 1700 MPa,wherein a reinforcement plate is provided in at least one section, wherein one reinforcement plate is connected in the section of the transition between the B-pillar and the sill. Due to the integrated design, open nodes are formed in the sidewall reinforcement at the node points, which have low torsional stiffness. The open nodes are found primarily in the section of the transition between the B-pillar and the sill, in the section of the transition between the B-pillar and the roof rack, in the section of the transition between the A-pillar and the sill, in a simple version and in an extended version additionally in the section of the transition between the C-pillar and the sill, and in the section of the transition between the C-pillar and the roof rack. Further "open" nodes can be defined in the roof rack section in the area of ​​the connection to the upper cowl and in the A-pillar section in the area of ​​the connection to the lower cowl.both in the simple and the extended version.,

[0011] The inventors have found that by deliberately doubling the material with at least one reinforcement plate connected to the semi-finished product in at least one node area, the torsional stiffness in this or these areas can be increased and, in particular, the crash performance can also be improved.

[0012] To specifically increase the torsional rigidity of the open nodes, reinforcement plates are inserted in the corresponding sections. The reinforcement plate(s) are joined or bonded using a thermal joining process before the customized semi-finished product is hot-press hardened. The deformation of the bonded reinforcement plate(s) by hot-press hardening thus occurs directly and in one step with the semi-finished product.

[0013] The reinforcement plates must be arranged according to the torsional stiffness and, in particular, crash load cases, which can vary from body to body. Nevertheless, these are generally located in the aforementioned transition sections and, optionally, also in the connection area.

[0014] The reinforcement plates consist of a steel material, in particular a manganese steel material or preferably a manganese-boron steel material, preferably have a thickness between 0.8 and 2.5 mm, and preferably have a tensile strength in the hot-press-hardened state of between 400 and 2200 MPa, in particular between 700 and 2200 MPa, preferably between 900 and 2200 MPa, preferably between 1400 and 2200 MPa. The open node in the transition section between the B-pillar and the sill is particularly susceptible to torsional stiffness and thus also to crash loads, so that a reinforcement plate must be connected in this section.

[0015] If, for example, two sidewall reinforcements are used, either only the inner sidewall reinforcement or only the outer sidewall reinforcement or both sidewall reinforcements can be designed according to the invention.

[0016] The torsional rigidity can be improved and / or optimized if, for example, an additional reinforcement plate is attached in the section of the transition between the B-pillar and the roof rack.

[0017] To improve torsional rigidity, an additional reinforcement plate can be connected in the section of the transition between the A-pillar and the sill in addition to or alternatively to the transition between the B-pillar and the roof rack.

[0018] In addition to or as an alternative to the transition between the B-pillar and roof rack and / or the transition between the A-pillar and sill, a reinforcement plate can also be attached in the section of the roof rack in the area of ​​the connection to the upper cowl.

[0019] In addition to or alternatively to the transition between the B-pillar and roof rack and / or the transition between the A-pillar and sill and / or in the section of the roof rack in the area of ​​the connection to the upper cowl, a reinforcement plate can also be connected in the section of the A-pillar in the area of ​​the connection to the lower cowl.

[0020] In addition to a simple design in the form of a door ring, the reinforcement described so far can also be used in an extended design in the form of a double door ring, so that in an extended design, in order to improve the torsional rigidity, an additional reinforcement plate can be additionally or alternatively connected in the section of the transition between the C-pillar and the sill.

[0021] Torsional rigidity can be improved and / or optimized if, for example, an additional reinforcement plate is connected in the transition section between the C-pillar and roof rack, in addition to or as an alternative to the transition between the C-pillar and sill. The selection and combination of different steel compositions, different surface coatings, and / or different thicknesses, as well as high tensile strengths and elongations at break, can be combined in a semi-finished product, offering significant potential for weight reduction of the hot-press-hardened sidewall reinforcement, thus providing a suitable, tailor-made semi-finished product.

[0022] The first blank in the semi-finished product consists of a steel material that, in the hot-press-hardened state, has a tensile strength of greater than 1700 to 2200 MPa, which is preferably used for the roof rack and a section of the A-pillar. This allows for improved stabilization of the passenger compartment not only in the vehicle's longitudinal direction, but also in the vertical direction. Especially with the heavy weight of battery-powered (electric) vehicles, stabilization in the vertical direction represents a significant advantage, particularly beneficial in load cases such as vehicle rollover and roof collapse.

[0023] A-, B- and C-pillars are vertical support structures on a vehicle, which, among other things, stabilize the passenger cell. The upper section of the A-pillar merges into the roof rack towards the rear of the vehicle, and the roof rack is connected further towards the rear of the vehicle to the upper section of the B-pillar and, optionally or in the case of extended versions, to the upper section of the C-pillar. Opposite the roof rack is the sill in the floor area of ​​the vehicle. This extends from the front to the rear wheel house and, starting from the lower section of the A-pillar, is connected further towards the rear of the vehicle to the lower section of the B-pillar and, optionally or in the case of extended versions, to the lower section of the C-pillar.“Connected” can also be understood as “integral (or one-piece) design”, which applies to a semi-finished product according to the invention for producing a hot-press hardened sidewall reinforcement.

[0024] A material connection between the individual blanks is achieved by welding, so that the blanks are preferably butt-jointed. The welding method is known to those skilled in the art, see, for example, CN 112 593 153 A, EP 3 815 837 A1, and WO 2013 / 013676 A1. The semi-finished product comprises at least one second blank made of a steel material, which, in the hot-press-hardened state, has a tensile strength of greater than 1400 to a maximum of 1700 MPa.

[0025] The semi-finished product may comprise at least a third blank made of a steel material which, in the hot-press hardened state, has a tensile strength of greater than 900 to a maximum of 1400 MPa.

[0026] The semi-finished product may comprise at least a fourth blank made of a steel material which, in the hot-press hardened state, has a tensile strength of at least 400 to a maximum of 900 MPa.

[0027] The blanks used with the listed tensile strengths in the hot-press hardened state depend essentially on the carbon content of the respective steel composition, so that the increase in tensile strength in the hot-press hardened state is essentially accompanied by an increase in the carbon content in the steel material.

[0028] Manganese steel materials or manganese-boron steel materials are preferred.

[0029] A further first plate can be arranged in the semi-finished product, preferably in such a way that at least a partial section of the B-pillar results. The partial section in which the further first plate is arranged covers at least 70% of the extension of the B-pillar. Preferably, the further first plate is arranged between the plates forming the roof rack and sills. Preferably, the weld seam for connecting the plates forming the roof rack and the B-pillar is located below the plate forming the roof rack, and the weld seam for connecting the plates forming the sills and the B-pillar is located above the plate forming the sill. The course of the weld seams can essentially be horizontal.

[0030] A further first plate can be arranged in the semi-finished product, for example in such a way that at least a partial section of the sill results.

[0031] The first blanks can thus be made of an identical or similar steel material, but are designed such that they have a tensile strength of greater than 1700 to 2200 MPa in the hot-press hardened state. They preferably differ at least in their thickness. The thickness of the first blank can be between 0.8 and 2.5 mm, in particular between 0.9 and 2.2 mm, preferably between 1.0 and 2.0 mm.

[0032] In the semi-finished product, the second plate can be arranged in such a way that at least a partial section of the A-pillar results. The second plate can thus integrally form the front part of the sill. In particular, the weld seam connecting the plates forming the A-pillar and the sill is located on the side facing away from the front wheel house and preferably runs essentially vertically. Alternatively, the plate forming the sill can also extend completely between the front and rear wheel house. This would result in the second plate forming only a partial section of the A-pillar. In this case, the weld seam runs essentially horizontally.

[0033] The second blanks may be made of an identical or similar steel material, but are designed such that they have a tensile strength of greater than 1400 to 1700 MPa in the hot-press hardened state. They preferably differ at least in their thickness. The thickness of the second blank may be between 0.8 and 2.5 mm, in particular between 0.9 and 2.2 mm, preferably between 1.0 and 2.0 mm.

[0034] Terms such as "vertical" and "horizontal" essentially refer to the installed position in / on the vehicle, ensuring a clear and unambiguous assignment. The term "essentially" also allows for a minimal deviation of the weld seam between 0 and + / - 10° from the vertical or horizontal.

[0035] In the semi-finished product, a third plate can be arranged in such a way that, for example, the front longitudinal member results.

[0036] The third blanks may be made of an identical or similar steel material, but are designed such that they have a tensile strength of greater than 900 to 1400 MPa in the hot-press hardened state. They preferably differ at least in their thickness. The thickness of the third blank may be between 0.8 and 2.5 mm, in particular between 0.9 and 2.2 mm, preferably between 1.0 and 2.0 mm.

[0037] In the semi-finished product, for example in an extended version, a fourth plate can be arranged, preferably in such a way that at least a partial section of the C-pillar results. The partial section in which the fourth plate is arranged covers at least 70% of the extension of the C-pillar. The fourth plate is preferably arranged between the plates forming the roof rack and sills. The weld seam for connecting the plates forming the roof rack and the C-pillar is preferably located below the plate forming the roof rack and the weld seam for connecting the plates forming the sills and the C-pillar is above the plate forming the sill. The course of the weld seams can essentially be horizontal.

[0038] The fourth blanks may be made of an identical or similar steel material, but are designed such that they have a tensile strength of greater than 400 to 900 MPa in the hot-press hardened state. They preferably differ at least in their thickness. The thickness of the fourth blank may be between 0.8 and 2.5 mm, in particular between 0.9 and 2.2 mm, preferably between 1.0 and 2.0 mm.

[0039] At least one of the circuit boards can be coated with an aluminum-based coating. Alternatively, at least one of the circuit boards can be coated with a zinc-based coating. Further alternatively, at least one of the circuit boards can be uncoated.

[0040] A sidewall reinforcement is hot-press hardened from the tailor-made semi-finished product according to the invention. The method for producing hot-press hardened body components, especially from tailor-made semi-finished products, is familiar to those skilled in the art.

[0041] The invention further relates to a hot-press-hardened side wall reinforcement with an A-pillar, a B-pillar, optionally a C-pillar, a roof rack and a sill, and optionally a front longitudinal member, wherein the side wall reinforcement is hot-press-hardened from a tailor-made semi-finished product, wherein sections of the side wall reinforcement are formed with different steel compositions, different surface coatings and / or different thicknesses, wherein an additional reinforcing sheet is connected in at least one section of the side wall reinforcement, wherein a reinforcing sheet is connected in the section of the transition between the B-pillar and the sill.

[0042] Additionally, a reinforcement plate can be attached in the transition section between the B-pillar and the roof rack. Additionally or alternatively, a reinforcement plate can be attached in the roof rack section in the area where it connects to the upper cowl.

[0043] Additionally or alternatively, a reinforcement plate can be attached in the section of the A-pillar in the area of ​​the connection to the lower cowl.

[0044] Additionally or alternatively, a reinforcement plate can be connected in the section of the transition between the A-pillar and the sill.

[0045] Additionally or alternatively, a reinforcement plate can be connected in the section of the transition between the C-pillar and the sill.

[0046] Additionally or alternatively, a reinforcement plate can be attached in the transition section between the C-pillar and the roof rack.

[0047] The roof support and a section of the A-pillar can be made of a steel material with a tensile strength in the hot-press hardened state of greater than 1700 to 2200 MPa.

[0048] A section of the B-pillar may be made of a steel material with a tensile strength in the hot-press hardened state of greater than 1700 to 2200 MPa.

[0049] A section of the sill can be made of a steel material with a tensile strength in the hot-press hardened state of greater than 1700 to 2200 MPa.

[0050] A section of the A-pillar may be made of a steel material with a tensile strength in the hot-press hardened state of greater than 1400 to 1700 MPa.

[0051] A section of the C-pillar may be made of a steel material with a tensile strength in the hot-press hardened state of greater than 400 to 900 MPa.

[0052] The front longitudinal member can be made of a steel material with a tensile strength in the hot-press-hardened state of greater than 900 to 1400 MPa. The hot-press-hardened sidewall reinforcement (if two sidewall reinforcements are used, the inner and / or outer sidewall reinforcements can be designed accordingly) is used in a vehicle with a hybrid drive or, preferably, an electric drive.

[0053] With the hot-press hardened sidewall reinforcement according to the invention, improved torsional rigidity and / or crash performance is possible.

[0054] The invention will be explained in more detail below with reference to a drawing illustrating exemplary embodiments. Identical parts are provided with the same reference numerals.

[0055] Figure 1: a first tailor-made semi-finished product according to the invention for the production of a hot-press hardened side wall reinforcement and a hot-press hardened side wall reinforcement made therefrom in a front view in a simple design and

[0056] Figure 2: a second side wall reinforcement made from a tailor-made semi-finished product according to the invention, hot press hardened, in front view in an extended version.

[0057] Figure 1 shows a tailor-made semi-finished product (H) for producing a hot-press-hardened sidewall reinforcement (10) comprising a plurality of blanks (1, 2, 3) with different steel compositions, different surface coatings and / or different thicknesses, which are integrally joined together by butt-welding. The weld seams between the individual blanks (1, 2, 3) are marked with (S). All blanks (1, 2, 3) can preferably be coated with an aluminum-based coating. Alternatively, it would also be conceivable for them to be coated with a zinc-based coating or for them to be partially uncoated. Even when using an aluminum-based coating, the composition and / or thickness of the coatings can vary.

[0058] The at least one first blank (1) is made of a steel material which, in the hot-press hardened state, has a tensile strength of greater than 1700 to 2200 MPa. Preferably, the first blanks (1) consist of manganese-boron steel materials, preferably of grade 38MnB5. The at least one second blank (2) is made of a steel material which, in the hot-press hardened state, has a tensile strength of greater than 1400 to a maximum of 1700 MPa. Preferably, the second blank (2) is made of a manganese-boron steel material, preferably of grade 22MnB5. The at least one third blank (3) is made of a steel material which, in the hot-press hardened state, has a tensile strength of greater than 900 to a maximum of 1400 MPa. Preferably, the third plate (3) consists of a manganese-boron steel material, preferably of grade 8MnB7 or 12MnB6.

[0059] Using conventional hot press hardening, a sidewall reinforcement (10) with an A-pillar (11), a B-pillar (12), a roof rack (14), and a sill (15), optionally a front longitudinal member (16), is manufactured from the tailor-made semi-finished product (H) with the differently arranged blanks (1, 2, 3). It is essential that a reinforcement plate (A) is attached in the transition section between the B-pillar (12) and the sill (15).

[0060] A first blank (1) is arranged in the semi-finished product (H) in such a way that the roof rack (14) and a partial section of the A-pillar (11) result. The thickness of the first blank (1), from which the roof rack (14) and the partial section of the A-pillar (14) are produced after hot press hardening, is, for example, 1.5 mm. Thus, thicknesses between 1.3 and 1.7 mm would preferably be provided for this first blank (1).

[0061] Furthermore, a partial section of the B-pillar (12) is formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1700 to 2200 MPa, which in turn can be provided by a further first plate (1) with a thickness of, for example, 1.1 mm. Thus, thicknesses between 0.9 and 1.3 mm would preferably be provided for this further first plate (1).

[0062] Furthermore, a partial section of the sill (15) is formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1700 to 2200 MPa, which in turn can be provided by a further first blank (1) with a thickness of, for example, 1.0 mm. Thus, thicknesses between 0.8 and 1.2 mm would preferably be provided for this further first blank (1).

[0063] Furthermore, a partial section of the A-pillar (11) is formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1400 to 1700 MPa, which can be provided by a second plate (2) with a thickness of, for example, 1.8 mm. Thus, thicknesses between 1.6 and 2.0 mm would preferably be provided for this second plate (2).

[0064] Furthermore, a front longitudinal member (16) can optionally be formed from a steel material with a tensile strength in the hot-press hardened state of greater than 900 to 1400 MPa, which can be provided by a third plate (3) with a thickness of, for example, 1.3 mm. Thus, thicknesses between 1.1 and 1.5 mm would preferably be provided for this third plate (3).

[0065] The hot-press-hardened side wall reinforcement (10) in a simple embodiment of a door ring in Figure 1 is designed for use in a vehicle (not shown) with a hybrid drive or with an electric drive, which can provide improved torsional rigidity and / or crash performance by providing a reinforcement plate (A) in the section of the transition between the B-pillar (12) and the sill (15).

[0066] To optimize the torsional rigidity, additional reinforcement plates (B, C, D, E) can be provided in at least one of the following sections. For example, a reinforcement plate (B) can be connected in the section of the transition between the B-pillar (12) and the roof rack (14). Additionally or alternatively, a reinforcement plate (C) can be connected in the section of the roof rack (14) in the area of ​​the connection to the upper cowl. Furthermore, additionally or alternatively, a reinforcement plate (D) can be connected in the section of the A-pillar (11) in the area of ​​the connection to the lower cowl. Additionally or alternatively, a reinforcement plate (E) can also be connected in the section of the transition between the A-pillar (11) and the sill (15).

[0067] Figure 2 shows a hot-press-hardened sidewall reinforcement (10') of an extended design in the form of a double door ring, which has been hot-press-hardened from a semi-finished product (H') that is tailor-made compared to Figure 1. With the difference that at least one fourth blank (4) made of a steel material can be provided, which, in the hot-press-hardened state, has a tensile strength of at least 400 to a maximum of 900 MPa. The fourth blank (4) is preferably made of a manganese steel material, preferably of grade 6Mn3 or 6Mn6.

[0068] The at least one fourth plate (4) can, for example, be provided with a thickness of 1.1 mm, resulting in a partial section of the C-pillar (13) made of a steel material with a tensile strength in the hot-press hardened state of greater than 400 to 900 MPa. Thus, thicknesses between 0.9 and 1.3 mm would preferably be provided for this fourth plate (4).

[0069] To optimize torsional rigidity, additional reinforcement plates (B, C, D, E, F, G) can be provided in at least one of the following sections. In addition to the sections already mentioned in Figure 1, a reinforcement plate (F) can be additionally or alternatively connected in the transition section between the C-pillar (13) and the sill (15) and / or a reinforcement plate (G) can be connected in the transition section between the C-pillar (13) and the roof rack (14).

[0070] The reinforcing sheets (A, B, C, D, E, F, G) consist of a steel material, in particular of a manganese steel material or preferably of a manganese-boron steel material, preferably have a thickness between 0.8 and 2.5 mm and preferably have a tensile strength between 400 and 2200 MPa in the hot-press hardened state.

[0071] It would also be conceivable that at least one of the blanks (1, 2, 3, 4) could be flexibly rolled, whereby the manufacture and processing of flexible rolled flat products is also familiar to the person skilled in the art.

[0072] If, for example, two sidewall reinforcements are used, either only the inner sidewall reinforcement or only the outer sidewall reinforcement or both sidewall reinforcements can be designed according to the invention.

Claims

Patent claims 1. Tailor-made semi-finished product (H, H') for producing a hot-press-hardened sidewall reinforcement (10, 10') comprising a plurality of blanks (1, 2, 3, 4) with different steel compositions, different surface coatings and / or different thicknesses, which are materially bonded to one another, wherein the blanks (1, 2, 3, 4) in the hot-press-hardened state form a sidewall reinforcement (10, 10') with an A-pillar (11), a B-pillar (12), optionally a C-pillar (13), a roof rack (14) and a sill (15), optionally a front longitudinal member (16), wherein at least one first blank (1) is made of a steel material, which in the hot-press-hardened state has a tensile strength of greater than 1700 to 2200 MPa, wherein at least one second blank (2) is made of a steel material, which in the hot-press-hardened state has a tensile strength from greater than 1400 to a maximum of 1700 MPa,wherein a reinforcing plate (A, B, C, D, E, F, G) is provided in at least one section of the semi-finished product (H), characterized in that a reinforcing plate (A) is connected in the section of the transition between the B-pillar (12) and the sill (15).

2. Semi-finished product according to claim 1, wherein a reinforcing sheet (B) is connected in the section of the transition between the B-pillar (12) and the roof support (14).

3. Semi-finished product according to one of the preceding claims, wherein a reinforcing sheet (C) is connected in the section of the roof support (14) in the region of the connection to the upper cowl.

4. Semi-finished product according to one of the preceding claims, wherein a reinforcing plate (D) is connected in the section of the A-pillar (11) in the region of the connection to the lower cowl.

5. Semi-finished product according to one of the preceding claims, wherein a reinforcing plate (E) is connected in the section of the transition between the A-pillar (11) and the sill (15).

6. Semi-finished product according to one of the preceding claims, wherein a reinforcing plate (F) is connected in the section of the transition between the C-pillar (13) and the sill (15).

7. Semi-finished product according to one of the preceding claims, wherein a reinforcing sheet (G) is connected in the section of the transition between the C-pillar (13) and the roof rack (14).

8. Semi-finished product according to one of the preceding claims, wherein the one first plate (1) is arranged in the semi-finished product (H, H') in such a way as to result in the roof support (14) and a partial section of the A-pillar (11).

9. Semi-finished product according to one of the preceding claims, wherein at least one third plate (3) is provided from a steel material which, in the hot-press hardened state, has a tensile strength of greater than 900 to a maximum of 1400 MPa, wherein optionally a third plate (3) is arranged in the semi-finished product (H, H') in such a way as to result in the front longitudinal member (16).

10. Semi-finished product according to one of the preceding claims, wherein at least one fourth plate (4) is provided from a steel material which, in the hot-press hardened state, has a tensile strength of at least 400 to a maximum of 900 MPa, wherein optionally a fourth blank (3) is arranged in the semi-finished product (H') in such a way that at least a partial section of the C-pillar (13) results.

11. Semi-finished product according to one of the preceding claims, wherein a further first plate (1) is arranged in the semi-finished product (H, H') in such a way that at least a partial section of the egg column (12) results.

12. Semi-finished product according to one of the preceding claims, wherein a further first plate (1) is arranged in the semi-finished product (H, H') in such a way that at least a partial section of the sill (15) results.

13. Semi-finished product according to one of the preceding claims, wherein a second plate (1) is arranged in the semi-finished product (H, H') in such a way that at least a partial section of the A-pillar (11) results.

14. Hot-press hardened side wall reinforcement (10, 10') with an A-pillar (11), an egg-pillar (12), optionally a C-pillar (13), a roof rack (14) and a sill (15), and optionally a front longitudinal member (16), wherein the side wall reinforcement (10, 10') is hot-press hardened from a tailor-made semi-finished product (H, H'), wherein Sections of the side wall reinforcement (10, 10') are formed with different steel compositions, different surface coatings and / or different thicknesses, wherein in at least one section of the side wall reinforcement (10, 10') an additional reinforcing plate (A, B, C, D, E, F, G) is connected, in particular produced by a semi-finished product (H, H') according to one of the preceding claims, characterized in that a reinforcing plate (A) is connected in the section of the transition between the B-pillar (12) and the sill (15), wherein optionally a reinforcing plate (B) can be connected in the section of the transition between the B-pillar (12) and the roof rack (14), wherein optionally a reinforcing plate (C) can be connected in the section of the roof rack (14) in the region of the connection to the upper cowl, wherein optionally a reinforcing plate (D) can be connected in the section of the A-pillar (11) in the region of the connection to the lower cowl,wherein optionally a reinforcement plate (E) can be connected in the section of the transition between the A-pillar (11) and the sill (15), wherein optionally a reinforcement plate (F) can be connected in the section of the transition between the C-pillar (13) and the sill (15), wherein optionally a reinforcement plate (G) can be connected in the section of the transition between the C-pillar (13) and the roof rack (14).

15. Hot-press-hardened side wall reinforcement according to claim 14, wherein the roof support (14) and a partial section of the A-pillar (11) are formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1700 to 2200 MPa, wherein optionally a partial section of the B-pillar (12) can be formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1700 to 2200 MPa, wherein optionally a partial section of the sill (15) can be formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1700 to 2200 MPa, wherein optionally a partial section of the A-pillar (11) can be formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 1400 to 1700 MPa, wherein optionally a partial section of the C-pillar (13) can be formed from a steel material with a tensile strength in the hot-press-hardened state of greater than 400 to 900 MPa,wherein optionally the front longitudinal member (16) can be formed from a steel material with a tensile strength in the hot-press hardened state of greater than 900 to 1400 MPa, wherein optionally a section (17) of the lower B-pillar (12) and an adjacent region of the sill (15) can be formed with a tensile strength in the hot-press hardened state of greater than 900 to 1400 MPa., 16. Hot press hardened sidewall reinforcement according to claim 14 or 15 for use in a hybrid or electric vehicle.

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