KR20070119900A - An element attachable by riveting to a sheet metal part and also a component assembly and a method for the production of the component assembly - Google Patents

Abstract

A member and a component assembly coupled to a sheet metal part by riveting and a method for manufacturing the same are provided to maintain a coupling force of the sheet metal part in a predetermined reference range. A member coupled to a sheet metal part comprises a shaft(14) and a head(16). The head has a ring recess(20) at a side facing the sheet metal part. The ring recess has a radial inner side connected to a cylinder section(21) of the head to be posed in a ring type contact surface(24,24') and a radial outer side connected to the ring type contact surface through a conical wall(23). The cylinder section is connected with the shaft and a tube type rivet section(22). A local recess(32) is formed on the wall and/or a ring type base surface(26) selectively existing on the ring recess.

Description

ELEMENT ATTACHABLE BY RIVETING TO A SHEET METAL PART AND ALSO A COMPONENT ASSEMBLY AND A METHOD FOR THE PRODUCTION OF THE COMPONENT ASSEMBLY}

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the member which concerns on this invention with a centering function, A is a perspective view which shows the lower side of a head part, B is a partial longitudinal cross-sectional view, C is a bottom view of a head part.

2 is a view showing the fastening of the member according to the present invention, where A is a partial cross-sectional view showing a state before the member passes through the central opening of the conical ridge, and B is a part showing the component assembly through which the member has passed through the central opening. It is a cross section.

3 is a view similar to FIG. 1 but showing a modified embodiment of the invention in the form of a centering member with a fastening function.

FIG. 4 is a view similar to FIG. 2 but with a partial cross sectional view showing that the bolt member of FIG. 3 is fastened to the sheet metal part.

FIG. 5 is a view showing a screw-on state in which a component is fastened to the component assembly shown in FIG. 4.

The present invention relates to a member which can be fastened to a sheet metal part by riveting, in particular a centering bolt type member having a shaft portion and a head portion, wherein the head portion has at least a substantially annular ring recess on the side facing the sheet metal component. The ring recess merges radially inward with the cylinder section of the head portion, the cylinder section merges with the shaft portion and with a tubular rivet section surrounding the shaft portion in the region of the head portion, the ring recess Is disposed within an annular contact surface arranged radially outwardly thereof and merges with the annular contact surface radially outward through at least an approximately conical wall. The invention also relates to a component assembly comprising a sheet metal part to which the member is fastened, and a method for fastening the member to the sheet metal part.

Such members, component assemblies, and methods of manufacturing the same are known from FIGS. 8 and 9 of EP-A-0 539 793. In a known method, the sheet metal part has a conical ridge in the fastening area, the shaft portion of the bolt is provided with an annular rivet section which is provided with a screw and which is inserted through the central opening of the conical ridge on the raised side, the riveting process Wherein the upper region of the conical ridge is pressed flat and the rivet bead lies below the sheet metal part, i.e., toward the sheet metal part away from the head of the bolt member, and the ring recess presses the conical ridge flat. It still exists after one.

In the illustrated embodiment, there are a plurality of noses providing resistance to rotation, the noses being evenly distributed in the circumferential direction and present in the transition region to the annular rivet section of the ring recess of the head portion. It has a triangular shape in side view and the nose provides resistance to rotation extending radially only over a portion of the width of the ring recess.

However, this type of bolt member was not actually used. One reason is that these noses, on the one hand, provide resistance to rotation to prevent the sheet metal part from deforming into the desired shape, and on the other hand, the annular rivet sections are reinforced to bead the entire bead section. This is because it makes it difficult to form. In addition, this type of design can result in unwanted deformation of the sheet metal. In this type of member, a die button serves to form the rivet beads and to reform the sheet metal parts against the rivet beads, the rivet beads pressing the sheet metal parts. Thus, the formed rivet beads urge the sheet metal part against the nose providing resistance to rotation and the nose providing the resistance against rotation to the sheet metal material. This has been found to be practically inconvenient, making it difficult to form rivet beads, with the sheet metal caught in a nose providing resistance to rotation, the rivet section being deformed and only half of the sheet metal being pressed radially.

BACKGROUND OF THE INVENTION In a technique in which a member fastened to a sheet metal part by riveting serves as a centering member, a series of applications are known. In this regard, the member has a partial section of the shaft that is fastened to the member riveted to the sheet metal part and fits relatively tightly within the hole of a further component to be accurately positioned relative to the sheet metal part. In this regard, the centering member may have a simple centering function so that it may be possible to screw additional components to the sheet metal part by another member, or the centering member may be provided with a spiral at the same time to attach the additional component to the sheet metal part. Do it. Thus, the member has a fastening function as well as a centering function.

Such centering members, or centering and fastening members, are described, for example, in Profil Verbindungstechnik GmbH & Co. It is implemented in the form of the so-called SBF bolts by KG. In the SBF bolt member, the end of the head portion away from the shaft portion is adapted to rivet the sheet metal part.

It has been found that such a centering member, which optionally has a fastening function, substantially itself needs to be relatively reshaped to be fastened with the sheet metal part in the region of the head part of the member. As a result, for members with a shaft diameter of 12 mm or more, relatively large reforming forces are required for riveting the sheet metal parts. This is especially a problem when the sheet metal parts are quite thick, where centering members with large shaft diameters are often used.

Similar problems arise with other fastener members that may be used for centering purposes.

As another member, the centering member described in WO 02/077468 can be used. It is a functional member, wherein the head portion has an annular contact surface, the tubular rivet section is spaced apart from the head portion on the side of the contact surface of the head portion, and the tubular guide section is concentric with the tubular rivet section radially inside the tubular rivet section. An annular gap is provided between the guide section and the rivet section, the guide section protruding beyond the free end of the rivet section.

The free end of the wall of the tubular rivet section is rounded both radially outwardly and radially inwardly in the plane of the axial cross section, for example in a semicircular or arrowhead-like shape, which is advantageous for the formation of rivet beads . The guide section is formed as a piercing section and has an annular cutting edge at the end away from the contact surface to allow the member to be inserted into the sheet metal part by itself. The member is first formed as a nut member having a self-piercing function. However, in such a member, no ring recess is provided on the annular contact surface, and a nose providing resistance to rotation has a radially extending ridge or rib shape and is formed on the annular contact surface. do.

The object of the present invention is to have a simple centering function as well as a centering and fastening function, and even when the shaft diameter is 12 mm or more, the force required for fastening to the sheet metal part is kept within an acceptable limit, and unwanted deformation of the sheet metal part It is to provide a member of the above-described type, in which there is no risk, and excellent resistance to rotation can be realized with only one member for sheet metal parts having various thicknesses.

In order to achieve the above object, a member of the above-described type is provided with at least one local recess, preferably a ring recess in which a plurality of locally recessed uniformly distributed conical walls and / or optionally exist. It characterized in that the provided on the annular base surface.

By providing a resistance to rotation in the form of a local recess or a plurality of evenly distributed recesses in the conical wall of the ring recess and / or the tubular base surface of the ring recess, in particular in thick sheet metal, It is possible to avoid the situation in which the feature of providing resistance to rotation exhibits resistance so as to preferentially overcome the formation of the sheet metal part or the reforming of the rivet section upon fastening of the member to the sheet metal part. In addition, this recess, which provides resistance to rotation, can prevent unwanted deformation of the sheet metal part, which is particularly important for the centering member. In addition, this recess, which provides resistance to rotation, ensures proper rotation and ensures that the rivet bead is fully received in the ring recess existing below the sheet metal part, i.e., on the sheet metal part away from the head of the member. Without interfering with the formation, there is a flat fastening surface on the underside of the sheet metal part. This allows the guide section of the member to act as a centering action to be provided directly to the lower end of the sheet metal part, ie the free end face of the rivet bead present in the shaft portion of the member, thus making it ideal for the component disposed throughout the guide section of the member. Ensure centering or positioning is guaranteed.

In addition, the member according to the invention can be used in one embodiment where the difference in sheet metal thickness is relatively wide. For example, in sheet metal with a thickness range of 0.6 to 3.5 mm, a rivet bead located in a ring recess below the sheet metal part protrudes beyond the lower part of the sheet metal part so that the cover does not cause problems when additional components are fastened. Only two different members are needed to do this. For example, a sheet metal thickness of 0.6 to 1.5 mm may be covered in a first embodiment with short rivet sections, and a sheet metal thickness of 1.5 to 3.5 mm may be covered in a second embodiment with long rivet sections. In particular, it is possible to use one member with a rather short rivet section for sheet metal thickness in the range of 1.25 to 3.0 mm, which is a very frequent range for the centering bolt. The present invention is not limited to a member having a shaft having a diameter of 12 mm, and a wide range of shaft diameters can be used, for example, without limitation in the range of 4 to 38 mm.

The member according to the invention also makes it possible to carry out the so-called clamping hole riveting process according to EP 0 539 793 B1, which has the advantage that a desired fastening can be achieved between the sheet metal part and the member. That is, the conical ridges are flattened (partially) to reduce the size of the central opening of the sheet metal part during the execution of the riveting process so that the rim area of the opening is the sheet metal of the member in the area above the rivet section or in the area of the rivet section. While in contact with the rivet section is bent radially outward through the riveting process and optionally radially extended by the riveting process.

However, it is not essential to use a clamping hole riveting process, and while the rivet section forms a bead, the conical ridges will cause the sheet metal material to collapse between itself and the head of the member. It can be combined with the shape of the ring recess at the bottom of the head, the sheet metal material is pressed against the radially inner side in addition to flowing toward the local recess, the above object can be achieved.

Even if the fastener member simply has a centering function, resistance to rotation is provided in the form of a local recess so that it can be simply ensured that the fastening method of the member to the sheet metal part is reliably performed in the required process. It is desirable to have a feature to. That is, after the fastening of the member of the sheet metal part, and through proper support of the sheet metal part, torque is applied to the member to twist or loosen the member with respect to the sheet metal part. The level of torque generated is a measure of how firmly the member is fastened to the sheet metal part and can be used to maintain or confirm quality.

In a member having a fastening function, the fastening function can be achieved when the nut is fastened to the shaft portion of the member embodied as the bolt member or when the screw is inserted into the hollow shaft part of the member formed as the nut member. In other words, a feature is provided that provides resistance to rotation in any case so that the required resistance to rotation can be achieved. When the member is formed as a nut member, a helix may be provided in the fastening section provided on the head portion, the hollow shaft portion, and / or the head portion away from the shaft portion. If a helix is provided in the fastening section, the outer diameter of the fastening section is preferably smaller than the outer diameter of the head portion of the member, whereby an annular pressure contact surface is provided to press the member against the sheet metal part, thereby reducing the effect of the fastener section. The riveting process can be realized without deformation. If the member is implemented as a nut member, self penetration may be achieved.

Preferred embodiments of the absence of the invention relate to claims 1 to 11.

In the component assembly according to the invention, the sheet metal part has an annular ridge in the ring recess area received in the ring recess, the material of the sheet metal part is placed in the local recess, and the sheet metal part is remote from the ring recess. At the side, there is a ring recess in which a rivet section bent towards the rivet bead is arranged, wherein the side of the rivet bead away from the head portion at least substantially does not protrude beyond the side of the sheet metal part in the region around the rivet bead and slightly against the rivet bead. It is preferable to retreat.

Preferred embodiments of such component assemblies relate to claims 13 and 14.

Finally, the method of the present invention for fastening a member to a sheet metal part for the formation of a component assembly comprises at least a hole for forming a ridge that has a conical shape that is at least substantially consistent with the shape of the ring recess or preferably steeper than the conical wall. The member is inserted into a preformed sheet metal part preformed in the region of the die, the sheet metal around the rivet section having a central recess or central bore receiving the shaft portion and an annular ridge surrounding the central recess or central bore. Each local recess is formed by a button and the rivet section is placed or pressed against the ring recess formed below the sheet metal part during the formation of the rivet beads.

In this embodiment, the annular ridge of the die button is formed at a free end having at least substantially a ring edge that merges with a rounded surface disposed radially outwardly, whereby the rivet section is reformed into rivet beads. do. In this regard, the diameter of the ring edge is smaller than the diameter of the tubular rivet section of the ring tip region of the free end of the rivet section so that the ring edge can deform the rivet beads radially outward during the riveting process.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 and 2 show the member 12 fastened to the sheet metal part 10 by riveting. The member 12 has the form of a centering member having a shaft portion 14 and a head portion 16, wherein the head portion is at least approximately annular ring recess 20 on the side portion 18 away from the sheet metal part 10. The recess is merged radially inwardly into the cylinder section 21 of the head portion 16, the cylinder section being merged with the shaft portion 14 and the area of the head portion 16, ie the head portion ( Just below 16 it merges with a tubular rivet section 22 surrounding the shaft portion 14. The ring recess 20 is arranged in an annular contact surface 24 arranged radially outwardly thereof, or radially outward of a contact surface 24 'consisting of a circular ring segment, at least approximately conical wall 23. Through and merge with the contact surface 24 or 24 'radially outward. The conical wall 23 preferably has an angle of about 33 ° with respect to the horizontal plane, which angle may be selected in the range of 20 ° to 45 °, but is not limited thereto.

On the radially inner side of the conical wall, the ring recess 20 has a curved annular base face 26 in which at least half of the cross section is merged with the radially outer face 28 of the cylinder section 21. In this embodiment, the base surface 26, which is curved in half in the radial section, includes a flat portion 28 that is substantially perpendicular to the central longitudinal axis 30 of the member 12. As shown in FIG. However, the flat base surface may be omitted or the radial width of the flat portion 28 may be expanded to merge with the cylinder section 21 over the conical wall 23 and / or the rivet section 22 directly or with a relatively small radius. You may. The base surface can also be realized differently, ie by a relatively sharp transition to the cylinder section 21 above the rivet section 22 of the conical wall (wherein the term “above” is the depicted direction of the member 12). , Not a geometric definition).

At least one local recess 32, preferably a plurality of uniformly distributed local recesses 32, is conical wall 23 of ring recess 20 and / or optionally ring recess 20. Provided on the base surface 26.

Each local recess 32 has an elongated round shape and transitions from the sidewall of each local recess to the surface of the ring recess 20 past the sharp edge. However, these transitions may also be rounded.

Each local recess 32 is arranged in an essentially radial plane and in this embodiment is made to extend into an annular contact surface such that the annular contact surface 24 is divided into circular ring segments 24 ′, FIG. 1B. Points 24 ', 32', and 24 'to the left of. Thus, "annular contact surface" should also be understood to cover a contact surface consisting of circular ring segments interrupted by local recesses. However, it is also possible to shorten the local recess so that it does not reach the contact surface 24 so that no division occurs.

More specifically, similarly to the division of the local recess, in this embodiment, the annular contact surface 24 also divides the base surface 26 of the ring recess 23. If the base surface 26 is annular, it should be understood to include a base surface interrupted by one local recess or a plurality of local recesses.

In this embodiment, six uniformly distributed local recesses are provided. However, one to twelve recesses may be provided, and more may be provided if these local recesses are made smaller or narrower and have a smaller depth.

As shown in FIG. 1B, the free end 34 of the wall of the tubular rivet section is viewed radially in plan view (as shown on the right side of FIG. 1B), both radially outer and radially inner, for example. It is rounded in a semicircular or arrowhead-like shape so that the ring tip at the lower end of the rivet section projects precisely at the position indicated by reference numeral 34.

1 and 2, the shaft portion 14 is formed of a solid or tubular centering portion. The member may be formed as the centering and fastening member according to FIGS. 3 and 4 instead of being simply a centering member.

In the description of the embodiments of FIGS. 3 and 4, components having the same shape and / or function as the embodiments of FIGS. 1 and 2 are given the same reference signs and unless otherwise noted, the same features and functions as described above. It should be understood that it applies. Conversely, unless otherwise noted, the descriptions of FIGS. 3 and 4 also apply to the embodiment of FIGS. 1 and 2. For simplicity, repeated descriptions will be omitted. 3 and 4, the shaft portion 14 is provided with a spiral 14 '.

The spiral 14 'has a thread run-out 14 "near the free end region of the tubular rivet section, and the spiral run-out merges with a cylinder section having a diameter equal to or greater than the outer diameter of the spiral. The cylinder section 40, which forms the actual centering section, is revealed first essentially when the member 12 is fastened to the sheet metal part 10, as shown in Fig. 4B. In an embodiment, the bent portion of the rivet section, ie the entire shaft portion 14 below the rivet bead 42 forms the centering section 40, or only the portion just below the rivet bead 42 forms the centering section and the rest. The portion may form a step, ie the diameter may be reduced for pre-centering.

Various modifications are possible to the member according to FIGS. 1 and 3. For example, the head part may have a functional part on the opposite side of the shaft part, for example in the form of an outer screw, an inner screw, an additional shaft part with a clip mounting part, or a guide part. As yet another alternative, the shaft portion 14 can be made longer and can serve as a guide for a pin or guide or can be provided with an internal thread.

Hereinafter, with reference to FIG. 2, the method of fastening the member 12 of FIG. 1 to a sheet metal part is demonstrated. The description of the fastening of the member 12 according to FIG. 3 applies equally to the sheet metal member 10 according to FIG. 4, and the same reference numerals are used. Thus, the description of the method according to FIG. 2 is not repeated with respect to FIG. 4.

As shown in FIG. 2A (4A), the member 12 has a hole preformed and an area of the hole 50 preformed with the ridge 52 to at least substantially correspond to the shape of the ring recess 23. Is inserted into the sheet metal part. In the present embodiment, the ridge 52 of the sheet metal part has the upper portion 53 flat and the hole 50 penetrating, so that the side wall 55 of the hole extends parallel to the longitudinal axis 30. However, it is not necessary to form the flat in advance, and the conical ridge 52 without the flat portion 53 can be formed directly. The stamping of the holes 50 can be combined with the pressing process for the formation of the holes 50 so that the holes 50 can extend conically and open upwards in FIG. 2A. As yet another alternative, the ridges may have a conical shape with a greater inclination than the conical wall 24 of the ring recess 23.

The fastening of the member to the sheet metal part is carried out in a manner known per se by the die button of the press or the C-shaped steel. In this configuration, pressing is applied, for example, to the head portion of the member, while the sheet metal part is supported on the die button. By means of a die button (not shown) having a central section or central bore receiving the shaft portion and an annular ridge surrounding the central section or the central bore, the sheet metal around the rivet section 22 is directed to the local recess 32. Is formed. The rivet section 22 lies in a ring recess 54 formed below the sheet metal part 10 during the formation of the rivet beads 42.

For this purpose, the annular ridge of the die button is preferably formed at the free end, and the ring edge is merged with a rounded surface disposed radially outward thereof. The diameter of the ring edge is chosen to be somewhat smaller than the diameter of the ring apex at the free end of the rivet section 22 so that the rivet section 22 is radially formed by the ring edge and the rounded surface during the riveting process. It is deformed outward to form rivet beads 42. In this combination, the sheet metal material is collapsed by the force exerted between the head of the member and the die button, and the sheet metal material flows into the local recess 32 so that rivet beads are formed by the radially outer region of the die button. A ridge is formed in the sheet metal material so as to form an interlock by the teeth between the 12 and the sheet metal part 10. Through the bead formation of the rivet section, the sheet metal material is further clamped in the radial groove 56 formed between the ring recess 20 and the rivet bead 42, thereby aligning the member 12 in the axial direction of the sheet metal part 10. Fix it. The sheet metal material is more firmly pressed against the shaft portion 14 of the member by the collapsing force (and the expansion of the rivet section occurring at the same time) in the region above the rivet bead 42, which generates a high friction force in the hole, The position of is firm and the resistance to rotation is increased. In addition, the sheet metal material is pressed, so that there is no risk of fatigue cracking even during dynamic operation. This effect can be further enhanced when the conical ridges of the sheet metal are pressed partially flat, ie when clamping or riveting processes are used in accordance with EP-A-0 539 793 described above.

Thus, as a result of the method, the component assembly comprises a sheet metal part 10 and a member 12 fastened to the sheet metal part 10, the sheet metal part 10 forming a form fitting in the region of the ring recess 20. It has an annular ridge 52 'that is received in a form fitting manner, and the material of the sheet metal part is disposed in each local recess 32. In addition, the ring recess 60 is present at the side 58 away from the ring recess 22 of the sheet metal part 10, and the rivet section is deformed to form the rivet bead 42 to form the ring recess 60. ). The side of the rivet bead 42 away from the head 16 protrudes at least substantially beyond the side 58 of the sheet metal part in the region around the rivet bead and slightly, eg 0.02 mm, relative to the rivet bead. It is preferable to retreat.

FIG. 5 shows the component assembly of FIG. 4B with additional component 70. Component 70 has a hole 72.

The inner diameter of the hole 72 is at least substantially equal to the outer diameter of the shaft portion 14, ie the centering section 40, in the region of the rivet bead 42, and the component is centered by the region of the shaft portion.

The component 70 is held with respect to the sheet metal part 10 by the fastener member 74 fastened to the shaft portion 14 of the member. That is, the outer screw 14 'is formed on the shaft portion, and is held by screwing the nut 74 to the outer screw 14', optionally via the washer 76. Alternatively, the shaft portion may be formed as a tubular portion with an inner screw (not shown), and the component 70 is fixed by a screw screwed to the inner screw.

It is to be understood that the member according to the invention does not need to satisfy the centering function, but can have a simple tightening function and therefore does not need to be a centering member or a centering bolt.

In all embodiments, all materials may be materials of members capable of obtaining class 8 or higher strength in accordance with ISO standards, in terms of cold deformation, for example 35B2 alloys. The fastening members thus formed are also suitable for all commercial steel materials for drawing quality sheet metal parts and for aluminum or aluminum alloys. As the aluminum alloy, one having a higher strength with respect to the fastening member may be used, for example AlMg5. The absence of higher strength magnesium alloys such as AM50 may also be considered.

According to the present invention, it can have a simple centering function as well as a centering and fastening function, and even if the shaft diameter is 12 mm or more, the force required for fastening to the sheet metal part is kept within an acceptable limit, and the There is no risk, and a member is provided for which sheet metal parts of various thicknesses can be realized with excellent resistance to rotation with only one member.

Claims (16)

In a member 12 which can be fastened to the sheet metal part 10 by riveting, in particular a member in the form of a centering bolt having a shaft portion 14 and a head portion 16, The head portion 16 has at least a substantially annular ring recess 20 on the side portion 18 facing the sheet metal part 10, the ring recess 20 radially inwardly extending the head. Through the wall 23, which is merged with the cylinder section 21 of the part 16 and located in its annular contact surface 24 or 24 ′ located radially outward, and radially outward at least approximately conical. Merged with an annular contact surface, the cylinder section 21 merges with the shaft portion 14 and with the tubular rivet section 22 surrounding the shaft portion 14 in the region of the head portion 16. , The conical wall 23 of the ring recess and / or optionally the annular base surface 26 of the ring recess is at least one local recess 32, preferably a plurality of local recesses which are uniformly distributed. (32) is provided. The method of claim 1, Member, characterized in that the radially inner region of the tubular rivet section (22) of the shaft portion (14) forms a centering section (21) or belongs to the centering section of the shaft portion (14). The method according to claim 1 or 2, The ring recess 20 is radially inward of the conical wall 23, which is at least substantially perpendicular to the longitudinal direction of the member or whose cross section is merged with the radially outer surface of the cylinder section 21. A member having an annular base surface (6, 28) that is curved. The method according to any one of claims 1 to 3, The local recess (32) has an elongated and rounded shape, wherein the transition from the sidewall of the recess (32) to the surface of the ring recess (20) is in the form of a sharp edge or a round. The method according to any one of claims 1 to 4, And wherein said local recess is disposed at least substantially in a radial plane. The method according to any one of claims 1 to 5, The tubular rivet section 22 is radially spaced apart from the shaft portion 14 or the centering section 40 in a radial direction, or radially inward of the tubular rivet section 22 with the centering section 40. A member characterized by being in contact. The method according to any one of claims 1 to 6, The free end (34) of the wall of the tubular rivet section (22) is rounded both radially outwardly and inwardly when viewed in an axial cross section, and has a semicircular shape or a shape similar to an arrowhead. The method according to any one of claims 1 to 7, And the shaft portion (14) is formed as a solid or tubular centering portion. The method according to any one of claims 1 to 8, And the shaft portion (14) has a spiral (14 '). The method of claim 9, The spiral 14 ′ has a thread run-out 14 ″ near the free end region of the tubular rivet section, wherein the spiral run out is equal to or greater than the outer diameter of the spiral 14 ′. Member, characterized in that it is merged with a cylinder section (40) having a large diameter. The method according to any one of claims 1 to 10, The head part 16 has a function part on the opposite side of the shaft part 14, the function part being in the form of, for example, an additional shaft part with an outer screw, an inner screw, a clip mounting part, or a guide part or a centering part. The member characterized by the above-mentioned. A component assembly comprising a sheet metal part 10 and a member according to any one of claims 1 to 11 fastened to the sheet metal part 10. The sheet metal part 10 has an annular ridge 52 accommodated in the ring recess 20 in the ring recess 20 region, The material of the sheet metal part is disposed in the local recess 32, The sheet metal part 10 has a ring recess 60 on the side 20 away from the ring recess 20 in which a rivet section 22 bent towards the rivet bead 42 is arranged, the head The side of the rivet bead 42 away from the part 16 does not protrude at least substantially beyond the side 58 of the sheet metal part in the region around the rivet bead 42 and is slightly retracted with respect to the rivet bead. Component assembly, characterized in that. The method of claim 12, The component 70 has a hole 72 disposed over the shaft portion 14 of the member 12, in contact with the sheet metal part 10, The inner diameter of the hole 72 is at least substantially equal to the outer diameter of the shaft portion of the region of the centering section 40, ie the rivet bead 42, wherein the component is centered by the region of the shaft portion. Component assembly, characterized in that. The method of claim 13, The component 70 is held to the sheet metal part 10 by a fastener member 74 fastened to the shaft portion 14 of the member, the holding being for example an outer thread 14 'on the shaft portion. And by screwing a nut to the outer screw (14 '), or by forming the shaft portion as a tubular part with an inner screw and screwing a screw to the inner screw. A method of fastening a member according to any one of claims 1 to 11 to a sheet metal part (10) to form a component assembly according to any one of claims 12-14. Pre-drilled, preferably preformed, preferably in the area of the hole to form a ridge 52 at least substantially coincident with the shape of the ring recess 20 or preferably having a conical shape steeper than the conical wall 23. Insert the member into the sheet metal part 10, The sheet metal around the rivet section 22 is routed to the local recess 32 by a die button having a central recess or central bore receiving the shaft portion and an annular ridge surrounding the central recess or the central bore. And the rivet section 22 lies on the side of the ring recess 20 formed in the lower surface of the sheet metal part or is pressed into the ring recess 20 during the formation of the rivet bead 42. Characterized in that the method. The method of claim 15, The free end of the annular ridge of the die button has at least substantially a ring edge that merges with a rounded surface disposed radially outward of the ring edge so that the rivet section 22 is formed of rivet beads 42. Characterized in that the method.

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