Component composite

Abstract

Component assembly with a sheet metal part (1) and a joining partner (5), with which the sheet metal part (1) is in a snap connection (S), in which at least one sheet metal part snap element (7) is latched in a joining partner recess (13), wherein the sheet metal part snap element is a sheet metal tab (7), the sheet metal tab foot section (23) of which merges into a sheet metal part base body (19) of the sheet metal part (1), wherein in a locking position of the sheet metal tab (7) a latching contour (11) of the sheet metal tab (7) engages positively in the joining partner recess (13), and wherein, in order to reduce an elastic restoring force (F) during a joining process, the sheet metal tab (7) has a material cross-section reduction on the sheet metal tab foot section (23), by means of which the sheet metal tab foot section (23) acts as a deflection shoulder, with which a Deflection of the sheet metal tab (7) can be achieved with low joining forces, characterized in thatthat the material cross-section reduction at the sheet metal tab base section (23) is implemented by at least one material cutout (41) open at the edge, and that the material cutout (41) open at the edge is formed in a tab transverse direction (Q) on one or both sides in a respective longitudinal edge (26) of the sheet metal tab (7), so that the sheet metal tab base section (23) is a sheet metal web with a reduced cross-section compared to the rest of the sheet metal tab (7), or that the material cross-section reduction at the sheet metal tab base section (23) is implemented by at least one circumferentially closed material recess (43) in the sheet metal tab (7).

Description

[0001] The invention relates to a component assembly comprising a sheet metal part and a joining partner according to the preamble of claim 1 or claim 4, as well as a sheet metal part snap-in element according to claim 10.

[0002] When manufacturing a vehicle body, body sheet metal parts can be joined together in a form-fitting and material-fitting manner using a snap connection in combination with, for example, an adhesive connection, as is shown, for example, in DE 10 2013 000 629 A1.

[0003] DE 10 2013 000 629 A1 discloses a component assembly in which a sheet metal snap-in element formed on a first sheet metal part can be latched into a joining partner recess. The sheet metal snap-in element is implemented as a sheet metal tab, the base section of which merges into a sheet metal part base body. The sheet metal part and the joining partner are joined together in one joining direction. During the joining process, the joining partner presses the sheet metal snap-in element into an unlocked position, building up an elastic restoring force. Upon reaching a joining position, the sheet metal snap-in element snaps into a locked position, dissipating the restoring force. In this locked position, a locking contour of the sheet metal snap-in element positively engages the joining partner recess.

[0004] When designing such a snap connection, the following requirements must be met: Firstly, the sheet metal snap element must exhibit sufficient elastic compliance. This ensures that the restoring forces (joining forces) occurring during the joining process are sufficiently low to enable a simple joining process in terms of production. Secondly, the snap element must provide sufficiently high connection rigidity in the assembled state to counteract the detachment of the sheet metal part from the joining partner in the opposite direction to the joining direction, until component failure of the sheet metal snap element occurs. In this case, the sheet metal snap element buckles in its central region, which is prone to buckling. Therefore, two different types of loading (i.e., elastic compliance during joining on the one hand, and buckling stability on the other) must be taken into account when designing the sheet metal snap element.

[0005] DE 295 00 072 U1 discloses a connecting element for the preferably permanent connection of sheet metal. DE 10 2015 221 937 A1 discloses a locking element of a contact with a nose-shaped projection. US 2016 / 0 016 522 A1 discloses a generic, continuously adjustable closure clip.

[0006] The object of the invention is to provide a component assembly comprising a sheet metal part and a joining partner, in which the usability of the sheet metal part snap element during the joining process and / or with regard to connection stiffness is improved compared to the prior art.

[0007] The object is achieved by the features of claim 1, claim 4 or claim 10. Preferred developments of the invention are disclosed in the subclaims.

[0008] Claim 1 relates to a first aspect of the invention, which specifically simplifies a joining process by reducing the elastic restoring force during the joining process. The first aspect of the invention is based on the fact that, in known metallic snap elements, the area moment of inertia is consistently constant over their entire length, resulting in an unfavorable ratio of joining and release forces. Against this background, according to claim 1, the sheet metal tab has a reduced material cross-section at the base section, by means of which the base section acts as a deflection shoulder. With the aid of the reduced-cross-section sheet metal tab base section, deflection of the sheet metal tab can be achieved during the joining process with low joining forces.

[0009] The first aspect of the invention above offers the advantage that the release force of the snap elements remains constant, since the buckling stiffness (or the area moment of inertia in the center of the spring element) remains unchanged. At the same time, the joining force is reduced, since the area moment of inertia (correlating with the material cross-section) in the root (i.e., in the base section of the sheet metal tab) is reduced. This broadens the applicability of the snap elements to include stiffer joining partners.

[0010] With regard to the first aspect of the invention, the following should be noted: When snap elements are released, the following two failure mechanisms generally arise: First, the entire snap element can elastically spring inward, particularly at the root. In this case, the snap element can be released non-destructively simply by applying force against the original joining direction. This occurs when an angle of the locking flank of the snap element leading against the joining direction is greater than 15-25° (depending on various parameters such as the length of the spring element). Second, the spring element can buckle approximately in the middle. In this case, the snap element cannot be released non-destructively simply by applying force against the original joining direction.This occurs when the aforementioned locking flank angle is less than 15-25°; this means that a so-called self-locking effect occurs, which prevents the locking flank from sliding off the joining partner. The first aspect of the invention is particularly important with regard to the second failure mechanism, namely for snap elements that cannot be released non-destructively simply by applying force against the original joining direction.

[0011] According to the invention, the material cross-section reduction at the base section of the sheet metal tab is achieved in two ways: First, lateral material incisions are made in the sheet metal tab. Alternatively, second, a material recess (i.e., a hole) is created. The hole diameter should be approximately 20-30% of the width of the snap element. In any case, the material cross-section reduction (incision or recess) must be made directly at the root.

[0012] Further features of the invention are highlighted in detail below: The sheet metal tab can protrude from the sheet metal part base body in a tab longitudinal direction. The sheet metal tab can have a substantially constant material cross-section in the tab longitudinal direction, with the exception of the sheet metal tab base section, whose material cross-section is reduced in comparison. The ratio of the reduced material cross-section at the sheet metal tab base section to the remaining sheet metal tab material cross-section can preferably be in a range of 0.7 to 0.8.

[0013] According to the invention, the material cross-section reduction at the base section of the sheet metal tab is achieved by at least one material cutout open at the edge. The material cutout is formed on one or both sides of the respective longitudinal edge of the sheet metal tab in a cross-section direction. Thus, the base section of the sheet metal tab is a sheet metal web with a reduced cross-section compared to the rest of the sheet metal tab.

[0014] Alternatively, the material cross-section reduction at the sheet metal tab base section is formed according to the invention by at least one circumferentially closed material recess, in particular a bore, in the sheet metal tab. The material recess can be positioned approximately centrally in the sheet metal tab base section, viewed in the tab's transverse direction, so that the longitudinal edges of the sheet metal tab run consistently over the entire length of the sheet metal tab.

[0015] Claim 4 relates to a second aspect of the invention, which can be implemented alternatively or additionally to the first aspect of the invention on the sheet metal part snap-in element. According to claim 4, the sheet metal tab has at least one stiffness-enhancing reinforcing bead to increase the connection rigidity defined above, which is positioned in a sheet metal tab central region between the sheet metal tab base section and the locking contour.

[0016] As a result, the sheet metal part snap-in element has an increased connection strength compared to the state of the art, while maintaining essentially the same elastic compliance during the joining process (i.e., with sufficiently low joining forces).

[0017] The second aspect of the invention is based on the fact that a conventional sheet metal snap-in element is designed as a sheet metal tab with a locking lug. It has been shown that while such a conventional sheet metal tab exhibits sufficiently high elastic compliance during joining (i.e., low joining forces or restoring forces), it provides only a low connection stiffness that can counteract the detachment of the sheet metal part from the joining partner in the opposite direction of the joining. Therefore, under such a load, component failure of the sheet metal tab occurs prematurely, with the sheet metal tab buckling in its central region.

[0018] The second aspect of the invention advantageously increases the joint strength while maintaining a constant restoring force compared to the prior art. This potentially broadens the application spectrum of the snap elements according to the invention to include crash-relevant structures. Only a few snap elements are needed to ensure the required minimum strength of a sheet metal part to be joined, potentially saving time and money in the production of the sheet metal part to be joined.

[0019] As can be seen from the above, in the second aspect of the invention, the spring element of the snap element is stiffened with one or more beads using suitable forming processes. The beads are applied in such a way that the root (i.e., the base section of the sheet metal tab) of the snap element is not stiffened. By stiffening the spring element, its buckling is counteracted, which increases the strength of the snap element.

[0020] Since the root (i.e. the base section of the sheet metal tab) is not stiffened by the bead and thus its stiffness is kept at a low level, the joining force also remains constantly low.

[0021] By applying the second aspect of the invention, the joining force of the snap element can be kept constant - compared to the prior art - while at the same time increasing its strength.

[0022] The process used to manufacture the snap-in element according to the invention can be divided into the following steps: First, a U-shaped sheet metal cutout is cut out of the base sheet of the joining part. This exposes a web into which the rear locking element and the bead are later inserted. This web subsequently forms the snap-in element.

[0023] The rear locking element and the bead are then formed. Care must be taken to ensure that the rear locking element and the bead are each formed in opposite directions to prevent the bead from hindering the joining process of the snap element. This is because, by definition, the joining partner slides along the spring element in order to elastically deform it. It is also important to leave a "deflection shoulder" between the bead and the root of the web unchanged, i.e., not to reshape this shoulder. Otherwise, the introduction of the bead would not only increase the strength but also the joining force of the subsequent snap element. However, the joining force should be kept as low as possible. The bead is positioned centrally between the rear locking element (i.e., the locking contour) and the root (i.e., the base section of the sheet metal tab), as this area is most prone to buckling.

[0024] The at least one stiffening bead can, for example, be formed as a bulge in the sheet metal tab. An even better stiffening effect is achieved if the sheet metal tab has two narrow, elongated beads that are oriented parallel to the forming direction of the web and arranged next to each other. More than two beads can also be formed in this case.

[0025] The provision of two stiffening beads results in very high degrees of deformation. These high degrees of deformation are naturally accompanied by a high degree of work hardening of the material, which additionally counteracts buckling and thus increases the strength of the snap-in element. In this variant, the beads are also unilaterally shaped and oriented opposite to the direction of formation of the rear locking elements (i.e., the locking contour). In this solution, a deflection step between the root and the bulge is also left unchanged.

[0026] The beads can be introduced into the web, for example, by stretch forming. In addition to changing the geometry, stretching the material also results in high strain hardening, which also counteracts potential buckling and thus further increases the strength of the snap elements.

[0027] Further features of the invention are highlighted in detail below: In a technical implementation, the sheet metal tab base section can preferably be completely bead-free and flat. The sheet metal tab base section can extend over a spring length from the sheet metal part base body.

[0028] In a specific embodiment, the stiffening bead can protrude from the center region of the sheet metal tab by a bead height, while the locking contour can protrude from the center region of the sheet metal tab by a locking height. The stiffening bead and the locking contour can preferably protrude in opposite directions on both sides of the sheet metal tab to prevent the stiffening bead from interfering with the joining process of the snap-in element.

[0029] In a preferred embodiment, the sheet metal tab center section can have a flat sheet metal base that merges flush with the sheet metal tab foot section and into which the stiffening bead is formed. If a total of two stiffening beads are provided, these can be spaced apart from each other by a sheet metal center web.

[0030] The sheet metal tab base section can be formed onto the sheet metal part base body, forming a substantially straight spring axis. Furthermore, the locking contour of the sheet metal tab can have a locking flank facing the spring axis and a locking flank facing away from the spring axis. The two locking flanks can be angled relative to each other and converge at a locking contour apex. In the undeformed state, the locking contour apex can protrude from the substantially flat sheet metal tab base section by the locking height.

[0031] In a specific embodiment, to form the sheet metal part snap-in element, the sheet metal part base body can have a window-like, rectangular recess in which the sheet metal tab is positioned. A U-shaped sheet metal cutout is formed between the sheet metal tab and the window-like, rectangular recess, which acts as a free passage for movement. At one edge of the sheet metal recess, a sheet metal web forming the sheet metal tab base section can protrude inward into the recess. The sheet metal web merges into the sheet metal tab center region, in which the stiffening bead is formed. The sheet metal tab base section or the sheet metal web is bounded on both sides by the U-shaped sheet metal cutout.

[0032] An embodiment of the invention is described below with reference to the attached figures.

[0033] They show: Fig. 1 shows a schematic sectional view of a body structure in a rear area of a two-track vehicle, in which a spare wheel well sheet metal part is connected to lateral body longitudinal members; Fig. 2 a detailed view from the Fig. 1, which illustrates a snap connection between the two joining partners; Fig. 3 is a view illustrating a joining process; Fig. 4 a sheet metal snap-on element in the undeformed state and in a standalone position; Fig. 5a to 5c show a second embodiment of the invention; Fig. 6 and Fig. 7 a third and fourth embodiment of the invention, in each of which the sheet metal tab foot section has a material cross-section reduction; and Fig. 8 a fifth embodiment in a view corresponding to the Fig. 4.

[0034] In the Fig. 1 shows a vehicle body structure in a rear section, in which a sheet metal part designed as a spare wheel well sheet metal part 1 has lateral longitudinal flanges 3, which are connected to lateral joining partners 5 designed as body longitudinal members via a mechanical snap connection S described later and a material-locking adhesive connection K. The snap connection S is in the Fig. 1 or Fig. 2 is realized via a sheet metal part snap-on element, which is designed as a sheet metal tab 7. The sheet metal tab 7 is elastically and flexibly formed on the respective longitudinal flange 3 of the sheet metal part 1, forming a spring axis FA ( Fig. 4) at the transition from the sheet metal tab 7 into a sheet metal part base body 19 ( Fig. 4 to 7) of the sheet metal part 1. Each of the two lateral longitudinal flanges 3 of the spare wheel well sheet metal part 1 has a plurality of such sheet metal tabs 7, which are arranged one behind the other in the longitudinal flanges 3 in the vehicle longitudinal direction x.

[0035] In the in the Fig. 1, a slight adhesive gap remains between the longitudinal flange 3 and the joining partner 5, in which an adhesive layer 9 firmly bonds the two facing contact surfaces of the joining partners, i.e. the sheet metal part 1 and the joining partner 5. In the Fig. 1 or Fig. In the joining position shown in Figure 2, a locking contour 11 of the sheet metal tab 7 engages positively in a corresponding joining partner recess 13 designed as a longitudinal member recess.

[0036] In the Fig. 3 shows a joining process in which the sheet metal part 1 is placed in a joining direction I onto the two lateral joining partners 5. During the joining process, the locking contour 11 of the sheet metal tab 7 is pressed into an unlocked position by the respective joining partner 5, building up an elastic restoring force (i.e., a transverse force directed perpendicular to the joining direction I) F. Upon reaching the joining position (i.e., immediately before reaching the joining position), the elastically deformed sheet metal tab 7 snaps back into its locked position, dissipating the restoring force F, in which the locking contour 11 of the sheet metal tab 7 engages positively in the longitudinal member recess 13. The mechanical snap connection S thus created results in reliable positional securing of the sheet metal part 1 on the two joining partners 5.

[0037] As mentioned above, the sheet metal tab 7 is elastically resiliently molded onto the sheet metal part base body 19, forming a spring axis FA. On the one hand, the sheet metal tab 7 must have a (preferably sufficiently low) elastic resilience so that the joining forces or restoring forces F resulting during the joining process are sufficiently low. On the other hand, the sheet metal tab 7 must also provide a sufficiently high connection rigidity that reliably counteracts a detachment of the sheet metal part 1 from the joining partner 5 opposite to the joining direction I.

[0038] In order to provide such increased connection stiffness compared to the prior art, the sheet metal tab 7 according to the invention has the component geometry described below: The sheet metal tab 7 is designed with a stiffness-increasing stiffening bead 21 which is arranged in a sheet metal tab central region 30 ( Fig. 4) is positioned between the sheet metal tab foot section 23 and the locking contour 11.

[0039] The sheet metal tab foot section 23 extends in the Fig. 4 over a spring length I F from the sheet metal part base body 19 and, in contrast to the sheet metal tab center area 30, is completely bead-free and flat. Fig. 4, the sheet metal tab central region 30 has a flat sheet metal base 33 which merges flush into the sheet metal tab foot section 23 and in which the stiffening bead 21 is formed.

[0040] As from the Fig. 3, the stiffening bead 21 projects beyond a bead height h S in the transverse direction from the sheet metal tab center region 30. The locking contour 11 projects in the opposite direction with respect to the sheet metal tab center region 30 over a locking height h R away.

[0041] In the Fig. 4, the sheet metal part base body 19 is formed with a window-like, rectangular recess 24, within which the sheet metal tab 7 is positioned. Between the respective longitudinal edges 26 and a front edge 28 of the sheet metal tab 7 and the window-like, rectangular recess 24, a U-shaped sheet metal cutout 22 ( Fig. 4, Fig. 6 or Fig. 7) which forms a clearance for the sheet metal tab 7. At a lower recess edge 31 ( Fig. 4) A sheet metal web forming the sheet metal tab base section 23 is formed integrally into the window-like, rectangular recess 24. This web, made of the same material and integrally, merges into the sheet metal tab center region 30, in which the stiffening bead 21 is formed. The sheet metal tab base section 23, like the sheet metal tab center region 30 and the locking contour 11, is bounded on both sides by the sheet metal cutout 22.

[0042] The locking contour 11 points in the Fig. 2 or Fig. 3 a locking flank 25 facing the spring axis FA and one facing the spring axis FA ( Fig. 4) facing away from the locking flank 27. These are inclined to each other and converge at a locking contour apex edge 29. The locking contour apex edge 29 protrudes in the undeformed state ( Fig. 4) to the locking height h R from the flat sheet metal tab base section 23. The locking contour apex edge 29 also runs axially parallel to the spring axis FA.

[0043] In the Fig. Figures 5a to 5c show a second embodiment whose structure and functionality are largely identical to the embodiment shown in the previous figures. In contrast to the previous figures, Fig. 5a to 5c, a total of two stiffening beads 21 are formed in the sheet metal tab center region 30. The two stiffening beads 21 are arranged side by side, viewed across the sheet metal tab width, with the two stiffening beads 21 being spaced apart from each other by a sheet metal center web 35.

[0044] Below are the Fig. 6 or Fig. 7 further embodiments are shown. The basic structure and the functioning of the sheet metal tabs 7 shown therein are essentially the same as those of the Fig. 1 to 5. Therefore, reference is made to the previous description.

[0045] In contrast to the Fig. 1 to 5 concern the Fig. 6 and Fig. 7 does not increase the connection stiffness of the sheet metal tab 7, but rather a sheet metal tab geometry by means of which the joining process can be simplified. Such a simplified joining process is described in the Fig. 6 and Fig. 7 is achieved by the sheet metal tab base section 23 having a reduced material cross-section. With the aid of the reduced material cross-section, the sheet metal tab base section 23 acts as a deflection shoulder, with which deflection of the sheet metal tab 7 can be achieved with low joining forces (i.e., with low elastic restoring forces F).

[0046] The Fig. The sheet metal tab 7 shown in Figure 6a has a rectangular basic shape and protrudes from the sheet metal part base body 19 in a tab longitudinal direction L. The sheet metal tab 7 has, viewed in the tab longitudinal direction L, a substantially constant material cross-section, with the exception of the sheet metal tab foot section 23, whose material cross-section is reduced in comparison.

[0047] In the Fig. 6a, the material cross-section reduction is realized by two material incisions 41 open at the edges. The two material incisions 41 open at the edges are components of the U-shaped sheet metal cutout 22 and, viewed in a tab transverse direction Q, are aligned with each other on both sides in the respective longitudinal edge 26 of the sheet metal tab 7, which is designed in particular as a lateral longitudinal edge. In this way, the sheet metal tab base section 23 forms a sheet metal web with a reduced cross-section compared to the rest of the sheet metal tab 7. The ratio of the reduced material cross-section at the sheet metal tab base section 23 to the remaining sheet metal tab material cross-section is preferably in a range of 0.7 to 0.8.

[0048] Alternatively to Fig. 6a is in the Fig. 7a shows the reduction in the material cross-section by means of a material recess 43 formed as a bore in the sheet metal tab 7. The bore is positioned approximately centrally in the sheet metal tab foot section 23, viewed in the tab transverse direction Q, so that the longitudinal edges 26 extend constantly over the entire length of the sheet metal tab.

[0049] In the Fig. 8 is a view corresponding to the Fig. 4. Accordingly, the Fig. 8 shown sheet metal tab 7 as well as a stiffening bead 21 (corresponding to the Fig. 4) as well as a material cross-section reduction in the form of lateral and edge-open material cuts 41 (according to the Fig.6a). In this way, the combination ensures that both the connection stiffness of the sheet metal tab 7 is increased and the deflection of the sheet metal tab 7 during the joining process is achieved with lower joining forces (i.e., with low elastic restoring forces F).

Claims

[1] Component assembly with a sheet metal part (1) and a joining partner (5), with which the sheet metal part (1) is in a snap connection (S), in which at least one sheet metal part snap element (7) is locked in a joining partner recess (13), wherein the sheet metal part snap element is a sheet metal tab (7) whose sheet metal tab foot section (23) merges into a sheet metal part base body (19) of the sheet metal part (1), wherein in a locking position of the sheet metal tab (7), a locking contour (11) of the sheet metal tab (7) engages positively in the joining partner recess (13), and wherein, in order to reduce an elastic restoring force (F) during a joining process, the sheet metal tab (7) has a material cross-section reduction on the sheet metal tab foot section (23), by means of which the sheet metal tab foot section (23) acts as a deflection shoulder, with which a deflection of the sheet metal tab (7) can be achieved with low joining forces, characterized bythat the material cross-section reduction on the sheet metal tab foot section (23) is implemented by at least one material incision (41) which is open on the edge, and that the material incision (41) which is open on the edge is formed in a tab transverse direction (Q) on one or both sides in a respective longitudinal edge (26) of the sheet metal tab (7), so that the sheet metal tab foot section (23) is a sheet metal web with a reduced cross-section compared to the rest of the sheet metal tab (7), or that the material cross-section reduction on the sheet metal tab foot section (23) is implemented by at least one circumferentially closed material recess (43) in the sheet metal tab (7). [2] Component assembly according to claim 1, characterized bythat the sheet metal tab (7) protrudes from the sheet metal part base body (19) in a tab longitudinal direction (L), and that the sheet metal tab (7) has a constant material cross-section in the tab longitudinal direction (L), with the exception of the sheet metal tab foot section (23), the material cross-section of which is reduced in comparison, and / or that a ratio of the reduced material cross-section at the sheet metal tab foot section (23) to the remaining sheet metal tab material cross-section is in a range from 0.7 to 0.

8. [3] Component assembly according to one of claims 1 or 2, characterized by that the circumferentially closed material recess (43) is a bore, and that the material recess (43) is positioned centrally in the sheet metal tab foot section (23) when viewed in the tab transverse direction (Q), so that the respective longitudinal edges (26) run constantly over an entire sheet metal tab length. [4] Component assembly with a sheet metal part (1) and a joining partner (5) with which the sheet metal part (1) is in a snap connection (S), in which at least one sheet metal part snap element (7) is locked in a joining partner recess (13), wherein the sheet metal part snap element is a sheet metal tab (7) whose sheet metal tab foot section (23) merges into a sheet metal part base body (19) of the sheet metal part (1), wherein in a locking position of the sheet metal tab (7) a locking contour (11) of the sheet metal tab (7) engages positively in the joining partner recess (13), and wherein the sheet metal tab (7) provides a connection stiffness which counteracts a detachment of the sheet metal part (1) from the joining partner (5) opposite to the joining direction (I), namely until a component failure of the sheet metal tab (7) occurs, characterized byin that, in order to increase the connection rigidity, the sheet metal part (1) has at least one rigidity-increasing stiffening bead (21) which is positioned in a sheet metal tab central region (30) between the sheet metal tab foot section (23) and the locking contour (11). [5] Component assembly according to one of the preceding claims, characterized by that the sheet metal tab foot section (23) is completely bead-free and / or flat, and / or that the sheet metal tab foot section (23) extends over a spring length (I F ) extends from the sheet metal part base body (19). [6] Component assembly according to one of claims 4 or 5, characterized by that a stiffening bead (21) projects over a bead height (hs) in the transverse direction from a sheet metal tab central region (30), and that the locking contour (11) is provided with a locking height (h R), and that the stiffening bead (21) and the locking contour (11) protrude in opposite directions on both sides of the sheet metal tab (7), and / or that the sheet metal tab central region (30) has a flat sheet metal base (33) which merges flush into the sheet metal tab foot section (23) and in which the stiffening bead (21) is formed. [7] Component assembly according to one of claims 4 to 6, characterized by that a total of two stiffening beads (21) are formed in a sheet metal tab central region (30), and that the two stiffening beads (21) are arranged next to one another over a sheet metal tab width, and that the two stiffening beads (21) are spaced from one another via a sheet metal central web (35). [8] Component assembly according to one of the preceding claims, characterized bythat the sheet metal tab foot section (23) is formed on the sheet metal part base body (19) to form a straight spring axis (FA), and / or that to form the sheet metal part snap element, the sheet metal part base body (19) has a window-like, rectangular recess (24) in which the sheet metal tab (7) is positioned, and that a U-shaped sheet metal cutout (22) is formed between the sheet metal tab (7) and the window-like, rectangular recess (24). [9] Component assembly according to claim 8, characterized bythat at a recess edge (31) of the window-like, rectangular recess (24), a sheet metal web forming the sheet metal tab foot section (23) projects inwards into the window-like, rectangular recess (24), and the sheet metal web merges into a sheet metal tab central region (30) in which a stiffening bead (21) is formed, and / or that the sheet metal tab foot section (23) or the sheet metal web, viewed in a tab transverse direction (Q), is delimited on both sides by the sheet metal cutout (22). [10] Sheet metal part snap-on element for a sheet metal part (1) which can be installed in a component assembly according to one of the preceding claims.

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