Method for manufacturing a rear structure for a vehicle body

Abstract

The present disclosure relates to a method for manufacturing a rear structure (10) of a vehicle body, the method comprising: providing a mold (1) for a base part (20) of the rear structure (10), wherein the base part (20) comprises a sleeve portion (21), the sleeve portion (21) comprising a first wall (22) and a second wall (23), and wherein the first and second walls (22, 23) are arranged opposite to each other; die casting the base part (20) from metal using the mold (1), wherein a slide (4) of the mold (1) is inclined with respect to the second wall (23) such that the first wall (22) does not create a draft angle or creates a first draft angle (β), wherein the first draft angle (β) is smaller than a second draft angle (β) of the second wall (23); inserting a first end (31) of an extrusion molded part (30) of the rear structure (10) between the first and second walls (22, 23); and attaching the extrusion molded part (30) to the base part (20), wherein the extrusion molded part (30) comprises a second end (32) opposite to the first end (31), the second end (32) being for attachment to a bumper (40) of the vehicle body.

Description

Technical Field

[0001] This disclosure relates to a method for manufacturing a rear structure for a vehicle body, a rear structure for a vehicle body, and a vehicle including a vehicle body, the vehicle body including the rear structure. Summary of the Invention

[0002] The vehicle body can include several different structures that can be attached to each other. One of these structures is the rear structure, which is typically located at the rear of the vehicle. The rear structure is often used, particularly for the vehicle's trunk, where it supports the trunk floor. Luggage or other loads can be placed on the trunk floor and thus supported by the rear structure. However, the rear structure can also be attached to other components, such as shock absorbers or the typical rear suspension, batteries, and so on.

[0003] The rear structure of the vehicle body may include a cast base component and one or more extruded components attached to the base component. These extruded components may be used in the rear structure of the vehicle body for connection to rear vehicle components, such as body bumpers.

[0004] During a rear-end collision, extruded components may deform. Therefore, it is important to robustly attach these extruded components to the base components of the rear structure.

[0005] When die-casting the base component of the rear structure, a certain draft angle must always be used to allow the base component to be demolded from the mold after casting. This also applies to the sleeve portion of the rear structure, to which the extruded component is attached after the base component and sleeve portion are cast together.

[0006] Due to the draft angle, the inner wall of the sleeve portion to which the extruded part is attached is angled. This angled inner wall makes it difficult to provide a robust and stable connection with the extruded part. Specifically, as a result, the connection is unstable when using demanding joining methods to attach the extruded part to the sleeve portion.

[0007] This problem is addressed or mitigated, at least in part, by the contents of this disclosure.

[0008] According to a first aspect, a method for manufacturing a rear structure for a vehicle body is provided, the method comprising: - A mold is provided for a base component of a rear structure, wherein the base component includes a sleeve portion, the sleeve portion including a first wall and a second wall, and wherein the first wall and the second wall are arranged opposite to each other; - A base component made of metal die-casting is used, wherein the slider of the mold is inclined relative to the second wall, such that the first wall does not produce a draft angle or produces a first draft angle, wherein the first draft angle is smaller than the second draft angle of the second wall; - Insert the first end of the extruded component of the rear structure between the first wall and the second wall; and - Attaching an extruded component to a base component, wherein the extruded component includes a second end opposite to the first end, the second end being used to attach to a bumper of the vehicle body.

[0009] Therefore, the manufacturing method proposed herein enables the production of die-cast base components with sleeve portions for connection to extruded components, wherein the sleeve portion has one of two opposing walls with a draft angle smaller than or absent from the other wall. Consequently, the wall with the smaller or no draft angle does not, or at least minimally, extend at an angle from the base component and thus toward the extruded component to which it is attached. In practice, the wall with the smaller or no draft angle can extend straight or substantially straight toward the extruded component from the base component. Specifically, the required draft angle on the sleeve portion due to the die-casting process is offset toward one of the two opposing walls, resulting in a wall with no angle or a small angle. This wall on the extruded component allows for a more robust and stable connection between the extruded component and the wall within the sleeve portion, since the extruded component typically has a straight wall due to the extrusion process. Specifically, one of the straight walls of the extruded component can better fit the straight or nearly straight wall on the sleeve portion, thereby enabling a robust and stable connection of the extruded component and a defined position at the rear of the vehicle for optimal bumper positioning without any or related twisting.

[0010] In the context of die casting, a slider is a movable mold tool for a die. Besides movable mold tools, a die can include several fixed mold tools. The movable mold tool (generally referred to herein as a slider) can be used to form undercut features or complex geometries on a casting that cannot be formed with fixed mold tools. In this example, the slider is thus inserted into the die to form the sleeve portion of the base part. Typically, the slider does not tilt and retracts after casting, allowing the die-cast base part to be ejected without damage. This typically leaves draft angles on the opposing walls of the sleeve portion. However, by tilting the slider relative to (particularly toward) the second wall, the draft angle on or towards the first wall decreases, while the draft angle on or towards the second wall increases. The joining or attachment of the extruded part can be done only or primarily on the first wall, enabling a stable and robust connection to the extruded part.

[0011] In this context, the draft angle on the wall of the sleeve portion can refer to the taper or inclination applied to the wall of the sleeve portion during casting. This angle ensures that the slide can smoothly disengage from the sleeve portion after the metal material has solidified. The draft angle can be measured relative to the axis of the mold cavity formed by the mold tool, which can be perpendicular to the parting line of the mold.

[0012] Specifically, the wall can extend vertically along a vertical extension axis and horizontally along a horizontal extension axis. The opposing wall can be, in particular, a vertical wall whose vertical extension, or in other words, its height extension, is greater than its horizontal extension. The horizontal axis can coincide with the longitudinal axis of the vehicle body or vehicle. The draft angle can be an angle relative to the horizontal extension axis or the longitudinal axis of the vehicle body or vehicle. Thus, the draft angle can be located between the horizontal extension of at least the second wall (and optionally the first wall, if a draft angle exists, the draft angle of the first wall is smaller than that of the second wall) and the longitudinal axis of the vehicle body or vehicle. The draft angle on the second wall and optionally the first wall can be a slight outward slope. If the first wall has no draft angle, there is no slope, but the first wall can extend substantially straight or along the longitudinal axis of the vehicle body or vehicle. The rear structure can extend in width along the longitudinal axis of the vehicle body or vehicle. Furthermore, the rear structure can extend orthogonally to the longitudinal axis of the vehicle body or vehicle, or in other words, along the width axis of the vehicle body or vehicle. Therefore, any reference to the longitudinal axis in this document also applies to the width of the rear structure or its extensions.

[0013] Extruded parts are typically elongated components formed by an extrusion process. Specifically, extruded parts can be designed as extruded beams or profiles. For example, an extruded aluminum profile can be an extruded part. In other words, an extruded part can have a beam structure. Specifically, an extruded part can be a beam. An extruded part can have straight, parallel walls along its length. These walls can surround a space. This space can be at least partially filled with a support structure connected to the walls of the extruded part, particularly to improve the structural integrity of the extruded part, such as a cruciform support structure. Specifically, an extruded part can include a rectangular cross-section with two pairs of walls, each pair comprising two straight and parallel walls opposite each other. The dimensions of the extruded part can be set to fit into a sleeve portion of a base component. The straight walls of the extruded part can be aligned with and benefit from the corresponding walls of the sleeve portion, which are formed with no draft angle or a reduced draft angle, thereby ensuring a tight fit and consistent contact along the mating surfaces of the first wall of the sleeve portion and the corresponding contact wall of the extruded part. Therefore, the absence of draft angle or the reduction of draft angle on the sleeve portion wall facilitates the formation of a uniform interface, optimizing the alignment, structural stability, and load distribution between the extruded component and the sleeve portion under collision conditions.

[0014] The base components of the rear structure can advantageously be cast from metal, particularly as a single large casting. For large casting processes, high-pressure die casting can be used, in which molten metal (e.g., but not limited to aluminum) is pushed into a mold. This mold consists of mold tools that are pressed together and sealed before the molten metal is pushed in. After the metal is pushed in, the tools retract, the mold reopens, and the cast metal rear structure can be removed from the open mold.

[0015] According to one example, the slider can be tilted about two of the axes of the height axis, width axis, and depth axis of the base component. The sleeve portion also includes a third wall and a fourth wall arranged opposite to each other and forming the sleeve portion together with the first wall and the second wall. Specifically, the slider can be tilted about the height axis relative to or toward the second wall and about the width axis relative to or toward the fourth wall. Thus, the first wall has no draft angle or a reduced draft angle compared to the second wall along the height or vertical direction and along the width or horizontal direction, and this is also true for the entire inner surface of the first wall.

[0016] According to one example, the slider can be tilted at an angle ranging from 0.5° to 3°, particularly from 1° to 2°, relative to or toward the second wall. This covers the relevant draft angle of the created sleeve portion and the slider used advantageously. For example, the draft angle of the slider can be 1.5° on each side, or in other words, on each wall. Therefore, when the slider is tilted 1.5° relative to or toward the second wall, the draft angle originally generated on the first wall may be completely eliminated, and the draft angle on the second wall may be generated at 3° instead of 1.5°. The slider can be tilted at the same or different angles about the two axes described herein.

[0017] According to one example, the slider is tilted at an angle relative to or toward the second wall, which substantially corresponds to half of the second draft angle. Thus, no draft angle is generated on the first wall, resulting in a substantially straight first wall for improved connection to the extruded part.

[0018] According to one example, the outer wall of the first end of the extruded component can be substantially flush with the first wall. When substantially flush, the mating surfaces of the first wall and the outer wall extend together, ensuring uniform and continuous contact. Through the mating surfaces, the straight outer wall of the extruded component and the straight or substantially straight first wall of the sleeve portion are precisely aligned without gaps, offsets, or uneven transitions. This further improves the stability of the connection.

[0019] According to one example, attaching an extruded part to a base part may include fastening bolts between the extruded part and each opposing wall. Therefore, fastening can occur not only on the first wall but also on the second wall to improve attachment stability, although the draft angle is increased on the second wall.

[0020] According to one example, the bolts between the extruded component and the first wall can be tightened before the bolts between the extruded component and the second wall are tightened. This results in a flush alignment between the first wall of the sleeve portion and the outer wall of the extruded component, providing a particularly stable and robust connection between the extruded component and the base component. Conversely, the second wall can then be tightened to the extruded component after a stable connection with the first wall has been established, thus not affecting the flush and stable connection between the first and outer walls.

[0021] According to one example, the second wall can be deformed by tightening the bolts. Furthermore, the first wall can remain largely undeformed by the tightening of the bolts. This can be specifically achieved by first tightening, or in other words, the bolts on the first wall, and then tightening the bolts on the second wall.

[0022] According to one example, the bolt attachment portion of the outer surface of at least one wall can be machined flat to align with the bearing surface of the head of one of the bolts. This further improves the stability of the attachment, particularly through the flush fit between the bolt head and the flat outer surface.

[0023] According to a second aspect, a rear structure for a vehicle body is provided, the rear structure including a die-cast base member made of metal, wherein the base member includes a sleeve portion including a first wall and a second wall, wherein the first wall and the second wall are arranged opposite to each other, and wherein the first wall has no draft angle or the first draft angle of the first wall is smaller than the second draft angle of the second wall. The rear structure may further include an extruded member, wherein a first end of the extruded member is inserted between the opposing walls and attached to the base member, wherein the extruded member includes a second end opposite to the first end for attachment to a bumper of the vehicle body.

[0024] According to one example, the base component may also include a wheel cover portion for partially accommodating a wheel. The wheel cover portion may be located at opposite ends of the rear structure, wherein the sleeve portion is located between opposite ends of the rear structure. Specifically, the wheel cover portion may be located at opposite ends of the base component or the rear structure in the width direction or at an extension or axis.

[0025] According to one example, the base component and the extruded component may include aluminum. Specifically, the die-cast base component may be made of a single material, particularly a metal, such as aluminum or an aluminum alloy. Such an aluminum casting may be made entirely of aluminum, or may include aluminum (e.g., primarily composed of aluminum) and other materials, particularly metals. Additionally or alternatively, the extruded component may be extruded from aluminum or a material primarily composed of aluminum.

[0026] According to one example, the bumper can be attached to the second end of the extruded component via one or more fasteners. For example, bolts can attach the bumper (or in other words, the vehicle or body bumper) to the extruded component.

[0027] According to one example, the rear structure of the second aspect of this disclosure can be manufactured according to the method of the first aspect of this disclosure.

[0028] Alternatively or additionally, according to another aspect, a rear structure manufactured according to the method of the first aspect of this disclosure may be provided.

[0029] According to a third aspect, a vehicle is provided, which includes a body, the body including the rear structure described in any of the aspects mentioned herein.

[0030] It should be noted that the above examples can be combined with each other, regardless of which aspect is involved. Therefore, the manufacturing method can be combined with the structural features of the rear structure, and similarly, the rear structure can be combined with the features described above regarding the manufacturing method.

[0031] These and other aspects of this disclosure will become apparent from and be illustrated by the examples described below. Attached Figure Description

[0032] Examples of this disclosure will be described below with reference to the following figures.

[0033] Figure 1 A partial perspective view of the base component of the rear structure after it has been formed between the various mold tools is shown; Figure 2 It shows Figure 1 A detailed perspective view of the base components of the rear structure; Figure 3 It shows the process of die casting Figure 2 The view of the slider tilting around the height axis during the base component; Figure 4 It shows the process of die casting Figure 2 The view of the slider tilting around the width axis during the base component; Figure 5 A partial perspective view of the rear structure of the extruded component with an attachment to the base component is shown; Figure 6 A cross-sectional view is shown through the sleeve section and the extruded component; and Figure 7 It shows Figure 6 Detailed view of the cross-section through the sleeve section and the extruded part. Detailed Implementation

[0034] The accompanying drawings are merely schematic representations and are used to illustrate examples of this disclosure. Identical or equivalent elements are, in principle, provided with the same reference numerals.

[0035] Figure 1 A partial perspective view of the base component 20 of the rear structure 10 for a vehicle body is shown.

[0036] The rear structure 10 includes a base component 20, which may include, for example, two wheel arch portions located at opposite ends 11, 12 of the base component 20 or the rear structure 10. Figure 1 The diagram shows only the left wheel arch portion located at end 11, while the other end 12 (its location is indicated by reference numeral 12) is not shown in the partial view. The wheel arch portions are arranged to partially accommodate the wheel. The base portion of the base component 20 may extend a certain length between the two wheel arch portions.

[0037] The base component 20 of the rear structure 10 is manufactured by metal casting, specifically as a single large casting. Specifically, Figure 1 The process of casting the base component 20, which is part of the rear structure 10, using fixed mold tools 2 and 3, is shown. The fixed mold tools 2 and 3 are removed from the mold 1 in opposite directions.

[0038] In order to place the bumper 40 (not explicitly shown, but its location is in) Figure 5 (Middle indication) is attached to the base component 20 or the rear structure 10, the base component 20 being cast or formed to have such Figure 1 As shown and in more detail Figure 2 The sleeve portion 21 is shown in the figure.

[0039] Figure 2 It shows Figure 1 A partial perspective view of the base component 20 of the rear structure 10. A sleeve portion 21 is formed at the rear end of the base component 20 for attachment to the bumper 40. Specifically, the sleeve portion 21 serves as... Figure 5 The connector of the extruded part (or extruded part) 30 shown.

[0040] The sleeve portion 21 includes a first wall 22 and a second wall 23 arranged opposite to each other. In this example, both walls 22 and 23 are vertical walls, meaning that their vertical or planar extension is greater than their horizontal or planar extension.

[0041] Furthermore, the sleeve portion 21 includes a third wall 28 and a fourth wall 29 arranged opposite to each other and forming the sleeve portion 21 or the sleeve shape of the sleeve portion 21 together with the walls 22, 23. In this example, both walls 28, 29 are horizontal walls, meaning that their extension in the horizontal direction or plane is greater than their extension in the vertical direction or plane. Since the exterior of the walls 28, 29 can be formed by fixed die tools 2, 3 from above and / or below, there may be no draft angle on one or both of these walls 28, 29. Specifically, a draft angle can be avoided on the upper wall of the two walls 28, 29, whereby the wall can be substantially straight or similar to the first wall 22 being straight. This provides two substantially straight walls 22, 28 with straight surfaces for flush alignment of the outer walls of the extruded part 30, thereby providing a stable connection.

[0042] In addition, the sleeve portion 21 includes a rear wall 27, the extruded component 30 is inserted into the sleeve portion 21 toward the rear wall 27, and the extruded component 30 may or may not come into contact with the rear wall after attachment.

[0043] Figure 3 and Figure 4 The use of slider 4 as a movable mold tool and part of mold 1 during the casting process of base component 20 is shown. Specifically, Figure 3 and Figure 4 Details of casting the sleeve portion 21 within the mold cavity are shown. Here, the slider 4 forms a space or cavity, or generally forms the sleeve portion 21 of the base component 20. Specifically, the slider is inserted into the molten metal material within the mold cavity to form the sleeve portion 21, which, as part of the base component 20, has walls 22, 23, 28, and 29.

[0044] The slider 4 includes angled outer walls or surfaces, resulting in draft angles on walls 22 and 23. Therefore, during normal casting using the slider 4, walls 22 and 23 will be formed as draft angles, or in other words, angled surfaces. Specifically, the two walls 22 and 23 will typically be relative to or about... Figure 3 and Figure 4The depth axis x is angled. The depth of the base component 20 extends along the depth axis x. Furthermore, when the rear structure 10 is attached to or formed together with the vehicle body or vehicle (specifically, attachment is achieved through other structures of the rear structure 10 or vehicle body structures (not shown) that collectively constitute the vehicle body or vehicle), the vehicle body or vehicle can extend longitudinally along the depth axis x. Specifically, the depth axis x can coincide with the longitudinal axis of the vehicle body or vehicle. Therefore, the two walls 22, 23 will typically be inclined or angled relative to the depth axis x or the longitudinal axis of the vehicle body or vehicle, the angle corresponding to the angled wall or surface of the slider 4.

[0045] However, in the method for manufacturing the rear structure 10, the draft angle on or on the first wall 22 is reduced or completely avoided, or omitted. Specifically, after providing the mold 1 for die casting the base component 20, the slider 4 is tilted during the casting process, and / or the slider 4 is tilted and inserted into or into the mold 1 during the casting process.

[0046] Slider 4 is tilted relative to or toward the second wall 23, such as Figure 3 As can be seen, the base component 20 is inclined about the height axis z, which is perpendicular to the width axis y and the depth axis x. The base component 20 extends in height along the height axis z and in width or length along the width axis y. In this example, the tilt angle α of the slider 4 is 1.5°. Considering that the slider 4 has an outer wall or surface angled at 1.5° in this example, this results in an increased draft angle β of 3° on the second wall 23, but essentially no draft angle β or a very small draft angle β of about 0° along its height on the first wall 22.

[0047] In addition, such as Figure 4 As shown, slider 4 is also tilted at an angle α of 1.5° relative to or toward the fourth wall 29 about the width axis y, which is perpendicular to the height axis z and the depth axis x. This produces an increased draft angle β of 3° on the fourth wall 29, but there is essentially no draft angle β or a very small draft angle β of about 0° along its width on the third wall 28, so the third wall 28 extends substantially straight from the base member 20 in the plane or extends straight relative to the depth axis x.

[0048] Therefore, as Figure 5 As shown, the extruded component 30 can be inserted into the sleeve portion 21 with its first end 31 such that its straight outer wall 33 is flush with the substantially straight first wall 22 and optionally the rear wall 27. The absence of a draft angle or a reduced draft angle on the first wall 22 facilitates the formation of a uniform interface, optimizing the alignment, structural stability, and load distribution between the extruded component 30 and the sleeve portion 21 in the event of a collision.

[0049] The extruded component 30 shown herein is a rectangular extrusion beam, for example made of or comprising aluminum. Similarly, the base component 20 may be made of or comprise aluminum. Thus, in this example, the sleeve portion 21 is also formed as a rectangle, specifically having a rectangular space or cavity between walls 22, 23, 28, 29 into which the first end 31 of the extruded component 30 can be fitted. Specifically, the outer dimension of the extruded component 30, at least at the first end 31, may correspond to the inner dimension of the sleeve portion 21.

[0050] Fasteners in the form of bolts 50 and 51 (for use with) Figure 5 Bolt 50 is visible opposite bolt 51, see below. Figure 6 and Figure 7 Walls 22 and 23 are attached to the straight outer walls 33 and 34 (for the purposes of this connection). Figure 5 The straight outer wall 33 visible in the middle is opposite to the straight outer wall 34, see also Figure 6 and Figure 7 Additional bolts 52 and 53 are used to attach wall 28 to the upper wall of extruded component 30.

[0051] The corresponding holes 26 are machined into the sleeve portion 21 for inserting bolts 50, 51, 52, and 53 after the base component 20 is cast. Furthermore, the outer surface 24 of the first wall 22 is machined flat, having bolt attachment portions 25 for alignment with the support surface of the head 54 of the bolt 50. Similarly, the second wall 23 can be machined flat, having bolt attachment portions for alignment with the support surface of the head of the bolt 51.

[0052] The second end 32 of the extruded component 30, opposite to the first end 31, is attached to the bumper 40 by a plurality of fasteners 60 (e.g., additional bolts). The alignment of these fasteners with respect to the bumper 40 is important for connecting the bumper 40 relative to the base component 20 in a defined position and orientation without deformation or twisting. Figure 6 As shown, the extruded component 30 may have a support structure inside the outer walls 33, 34, which may, for example, have a cross-shaped cross-section.

[0053] In addition, such as Figure 6 and Figure 7 As shown, the second wall 23 may include a deformable section 70 or will typically deform after the fastening bolts 50, 51, while the first wall 22 may remain substantially undeformed. If the slider 4 is not tilted, both walls 22, 23 will have this deformable section 70.

[0054] Specifically, bolt 50 can be tightened before bolt 51, thereby achieving flush alignment of walls 22 and 33, wherein... Figure 7As can be seen, walls 22 and 33 are parallel to each other. On the other hand, wall 23 is pulled toward wall 34 by fastening bolt 51, and walls 23 and 34 extend non-parallel to each other. Furthermore, bolts 52 and 53 can be fastened before bolt 51, thereby also providing flush alignment between wall 28 and the wall of the extruded component 30 opposite to wall 28. Because the walls 22 and 28 of the sleeve portion 21 are flush aligned with the wall 33 of the extruded component 30, the stability of the connection and the defined position of the bumper 40 relative to the base component 20 are maintained.

[0055] As a supplement to the extruded part 30 and the sleeve part 21 shown, in addition to Figure 1 Outside the left side or section shown, on the right side of the base component 20 or the rear structure 10, the base component 20 may have another sleeve portion 21 and an extruded component 30 for connection to the same bumper 40.

[0056] Ultimately, the rear structure 10 is crucial to the rear-end collision characteristics of the vehicle. Specifically, the extruded components 30 of the rear structure 10 (which may be aluminum profiles) should be designed to deform upon impact, as they are bolted to the base component 20 and therefore easily replaceable. Thus, the extruded components 30 typically need to be attached in a robust and reliable manner. However, since the extruded components 30 are extruded, they preferably have straight walls 22, 23. The walls 22, 23 are typically manufactured with draft angles due to the die-casting of the base component 20. However, the draft angles of the walls 22, 23 result in a weaker connection and preload in the walls 22, 23 when the bolts 50, 51 are tightened and the walls 22, 23 are secured to the walls 33, 34 of the extruded components 30, which is undesirable.

[0057] To address this issue and create an efficient, reliable, and robust connection, slider 4 can be angled, specifically angled downwards and inwards in two directions at the same angle as the draft angle, such as... Figure 3 and Figure 4 As shown. This results in two of the four walls 22, 28 being parallel to the straight walls 33, 34 of the extruded part 30. This avoids costly machining, makes assembly easier due to the reliable geometry, enables a robust screw connection, and minimizes preload.

[0058] The bolts 50, 51, 52, and 53 may be tightened in the order specified herein, such that the extruded component 30 first rests on the parallel walls 22 and 28. Specifically, bolts 50, 52, and 53 may be tightened or secured first, with bolt 51 tightened only afterward. This may be important because bolts 50, 51, 52, and 53 may be subjected to dynamic loads during the vehicle's service life, and the durability of these joints may be reduced if the extruded component 30 has already deformed during assembly due to the tightening of bolts 50, 51, 52, and 53.

[0059] As used herein, the phrase “at least one” in relation to a list of one or more entities should be understood to mean at least one entity selected from any one or more entities in the entity list, but not necessarily including at least one of each and every entity specifically listed in the entity list, and does not exclude any combination of entities in the entity list. This definition also allows for the optional presence of other entities besides those specifically identified in the entity list referred to by the phrase “at least one,” whether or not these other entities are related to those specifically identified. Thus, as a non-limiting example, “at least one of A and B” (or equivalently, “at least one of A or B”, or equivalently, “at least one of A and / or B”) in one example may mean at least one (optionally including more than one) A, without B (and optionally including entities other than B); in another example, it may mean at least one (optionally including more than one) B, without A (and optionally including entities other than A); and in yet another example, it may mean at least one (optionally including more than one) A and at least one (optionally including more than one) B (and optionally including other entities). In other words, the phrases “at least one,” “one or more,” and “and / or” are open-ended expressions that function as both conjunctions and analytics in practice. For example, the expressions “at least one of A, B, and C,” “at least one of A, B, or C,” “one or more of A, B, and C,” “one or more of A, B, or C,” and “A, B, and / or C” can each mean a single A, a single B, a single C, A and B together, A and C together, B and C together, A, B, and C together, and optionally any of the above combined with at least one other entity.

[0060] By studying the accompanying drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement other variations of the disclosed examples in practice. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. Any reference numerals in the claims should not be construed as limiting the scope of the claims.

[0061] List of reference numerals 1. Mold 2, 3 Fixing mold tools 4 sliders 10 Rear Structure 11, 12 end 20 Base components 21 Sleeve section 22 First Wall 23 Second Wall 24. Outer surface 25 Bolted attachments 26 holes 27. Rear wall 28 The Third Wall 29 The Fourth Wall 30 Extruded parts 31 First end 32 Second end 33 First outer wall 34 Second outer wall 40 Bumper 50 First Bolt 51 Second Bolt 52 Third Bolt 53 Fourth Bolt 54 Head 60 Fasteners 70 Deformation segment z-axis height x Depth axis y-width axis α Inclination angle β draft angle

Claims

1. A method for manufacturing a rear structure (10) for a vehicle body, the method comprising: - A mold (1) is provided for a base component (20) for a rear structure (10), wherein the base component (20) includes a sleeve portion (21) including a first wall (22) and a second wall (23), and wherein the first wall and the second wall (22, 23) are arranged opposite to each other; - Using a mold (1) to form a metal die-cast base component (20), wherein the slider (4) of the mold (1) is inclined relative to the second wall (23) such that the first wall (22) does not produce a draft angle or produces a first draft angle (β), wherein the first draft angle (β) is smaller than the second draft angle (β) of the second wall (23); - Insert the first end (31) of the extruded component (30) of the rear structure (10) between the first wall and the second wall (22, 23); and - Attach the extruded component (30) to the base component (20), wherein the extruded component (30) includes a second end (32) opposite to the first end (31), the second end (32) being used to attach to the bumper (40) of the vehicle body.

2. The method according to claim 1, wherein, The slider (4) is tilted about two of the axes of the height axis (z), width axis (y), and depth axis (x) of the base component (20).

3. The method according to claim 1 or 2, wherein, The slider (4) is tilted at an angle (α) relative to the second wall (23) in the range of 0.5° to 3°, particularly in the range of 1° to 2°.

4. The method according to any one of the preceding claims, wherein, The slider (4) is tilted at an angle (α) relative to the second wall (23), which is substantially half of the second draft angle (β).

5. The method according to any one of the preceding claims, wherein, The outer wall (33) of the first end (31) of the extruded part (30) is substantially flush with the first wall (22).

6. The method according to any one of the preceding claims, wherein, Attaching the extruded component (30) to the base component (20) includes fastening bolts (50, 51) between the extruded component (30) and each of the opposing walls (22, 23).

7. The method according to claim 6, wherein, The bolts (50) between the extruded part (30) and the first wall (22) are tightened before the bolts (51) between the extruded part (30) and the second wall (23) are tightened.

8. The method according to claim 6 or 7, wherein, The second wall (23) deforms by tightening the bolts (50, 51), while the first wall (22) is substantially undeformed by tightening the bolts (50, 51).

9. The method according to any one of claims 6 to 8, wherein, The bolt attachment portion (25) of the outer surface (24) of at least one of the walls (22, 23) is machined flat to align with the bearing surface of the head (54) of one of the bolts (50, 51).

10. A rear structure (10) for a vehicle body, the rear structure (10) comprising: - A die-cast base component (20) made of metal, wherein the base component (20) includes a sleeve portion (21) comprising a first wall (22) and a second wall (23), wherein the first wall and the second wall (22, 23) are arranged opposite to each other, and wherein the first wall (22) has no draft angle or the first draft angle (β) of the first wall (22) is smaller than the second draft angle (β) of the second wall (23); and - An extruded component (30), wherein a first end (31) of the extruded component (30) is inserted between a first wall and a second wall (22, 23) and attached to a base component (20), wherein the extruded component (30) includes a second end (32) opposite to the first end (31) for attachment to a bumper (40) of a vehicle body.

11. The rear structure (10) according to claim 10, wherein, The base component (20) also includes a wheel cover portion for partially accommodating a wheel therein, the wheel cover portion being located at opposite ends (11, 12) of the rear structure (10), wherein the sleeve portion (21) is located between the opposite ends (11, 12) of the rear structure (10).

12. The rear structure (10) according to claim 10 or 11, wherein, The base component (20) and the extruded component (30) comprise aluminum.

13. The rear structure (10) according to any one of claims 10 to 12, wherein, The bumper (40) is attached to the second end (32) of the extruded component (30) by one or more fasteners (60).

14. The rear structure (10) according to any one of claims 10 to 13, wherein the rear structure (10) is manufactured by the method according to any one of claims 1 to 9.

15. A vehicle comprising a body, said body including a rear structure (10) according to any one of claims 10 to 14.

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