Method for securing a first component to a second component, component arrangement

Abstract

The invention relates to a method for securing a first component (2) to a second component (3), wherein the first component (2) is inserted into a sleeve-shaped section (4) of the second component (3) in such a way that the first component (2) is facing a first end side (7) of the section (4) with a first surface (8), in particular touching the end side (7) at least in some regions, wherein a sleeve (9) is pushed onto the sleeve-shaped section (4) in such a way that the first component (2) is facing a second end side (10) of the sleeve (9), in particular touching the second end side (10) at least in some regions, with a second surface (11) facing away from the first surface (8), wherein at least one weld point (13) and / or a weld seam (13) is produced axially spaced apart from the second end side (10) on a casing wall (12) of the sleeve (9) in order to secure the sleeve (9) to the sleeve-shaped section (4), and wherein at least one further weld point (14) and / or one weld seam (14) is produced axially between the weld point (13) and / or the weld seam (13) and the second end side (10) on the casing wall (12) in such a way that the first component (2) is clamped between the first and the second end side (7, 10) due to the axial shrinkage of the sleeve (9) when cooling the further weld point 14) and / or the further weld seam (14).

Description

[0001] R.410742

[0002] - 1 -

[0003] Description

[0004] title

[0005] Method for attaching a first component to a second component, component arrangement

[0006] The invention relates to a method for attaching a first component to a second component, and to a component arrangement comprising two components attached to each other by such a method.

[0007] State of the art

[0008] In the mass production of modern brake control systems and cameras used in driver assistance systems, both material-bonding joining processes (welding, bonding) and form-fitting joining processes (riveting, crimping) as well as force-fit joining processes (screwing, press-fitting) are used to fasten components together. To achieve a manufacturing process suitable for large-scale production, it has been necessary to define the tolerances of the corresponding components as tightly as possible. This applies to both geometric component tolerances (component dimensions, form and position tolerances) and material-related tolerances (chemical composition of the materials, surface cleanliness, etc.). The tighter the tolerances are defined, the greater the effort required to manufacture the components, and the more expensive they become.

[0009] Disclosure of the invention

[0010] The method according to the invention with the features of claim 1 is characterized in that the first component is inserted into a sleeve-shaped section of the second component such that the first component faces a first surface of a first end face of the section, R.410742

[0011] - 2 - in particular, the end face at least partially touches, such that a sleeve is pushed onto the sleeve-shaped section in such a way that the first component, with a second surface facing away from the first surface, is oriented towards a second end face of the sleeve, in particular, the second end face is at least partially touched, such that at least one spot weld and / or weld seam is produced axially spaced from the second end face on a shell wall of the sleeve in order to attach the sleeve to the sleeve-shaped section, and that at least one further spot weld and / or weld seam is produced axially between the spot weld and / or weld seam and the second end face on the shell wall in such a way that the first component is clamped between the first and the second end face by the axial shrinkage of the sleeve when the further spot weld and / or weld seam cools.This advantageously ensures that the components can be securely and easily attached to one another without special tolerance requirements, as mentioned at the outset. The components cannot be directly welded together, for example, due to incompatible materials such as non-weldable material combinations, particularly steel and aluminum, or coated components. According to the invention, a quasi-indirect weld is created as a material-bonded connection, wherein a welded overlap joint is produced by the weld point and / or the weld seam on the outer wall of the sleeve, by which the sleeve is fixed to the second component, in particular a shaft or axle, and wherein an axial force is subsequently generated by the further weld point and / or the further weld seam, so that the first component enclosed between them is clamped in the axial direction as the component to be fastened.The sleeve-shaped section encompasses the first component at least partially radially, just as the sleeve encompasses the sleeve-shaped section with the first component at least partially radially. The sleeve is bonded to the sleeve-shaped section and shrinks axially due to the additional welding, so that a force in the axial direction is exerted on the first component, clamping it between the sleeve-shaped section and the sleeve acting as a clamping sleeve. For example, the method according to the invention is used to attach a sensor element, in particular a magnetic element, of a rotor position sensor as the first component to a rotor shaft as the second component (R.410742).

[0012] - 3 - to position and fix, particularly for use in an actuator arrangement of a brake force generator. The method according to the invention has many advantages compared to the joining methods mentioned at the outset. Devices for axially aligning the components relative to each other can be advantageously omitted by the method according to the invention because the first component can always be joined flush. The energy-intensive production and processing of the adhesive required for adhesive bonds, for example, thermal curing in an oven, is also unnecessary. Likewise, installation space is advantageously optimized because, for example, no adhesive pockets are required. Corresponding tolerances of the two components are advantageously equalized.A further advantage is that components can be attached to one another regardless of their geometry, as long as the geometric requirements for the connection of the sleeve-shaped section and the sleeve resulting from the aforementioned arrangement of the components involved—i.e., the components, the section, and the sleeve—are met. In particular, it is not necessary for the components to be in direct, full-surface contact with each other. Finally, even heat-sensitive components can be advantageously attached to one another using the method according to the invention without overheating, because the heat input is relatively low.

[0013] According to a preferred embodiment of the invention, the sleeve-shaped section is formed integrally with the second component. This integral formation results in a geometrically particularly simple design of the second component. The sleeve-shaped section is formed by a corresponding recess in the second component, for example, a recess in a shaft end of the second component, which is designed as a shaft.

[0014] The sleeve-shaped section is particularly preferably connected to the second component, especially by being pushed onto the second component with a diameter step. Such a connection of the section to the component offers the advantage that the section can be manufactured flexibly, independently of the component, and easily adapted geometrically to the first component. The sleeve-shaped section is thus designed as a separate, additional sleeve in the form of an intermediate sleeve. R.410742

[0015] - 4 -

[0016] According to a preferred embodiment of the invention, at least one of the weld points and / or one of the weld seams is produced by laser welding or laser shrinking. The use of laser welding or laser shrinking advantageously ensures that the weld points and / or weld seams are produced with particular precision.

[0017] Particularly preferably, at least one of the weld points and / or one of the weld seams is produced as a through weld. The advantage of producing a through weld is that the section and the sleeve are positively connected. For example, at least, and in particular exclusively, the respective weld point or weld seam used to attach the sleeve to the sleeve-shaped section is designed as a through weld.

[0018] According to a preferred embodiment of the invention, at least one of the weld points and / or one of the weld seams is produced as a blind weld. By producing a blind weld, it is advantageously ensured that the heat input into the section not directly welded through is reduced. For example, at least, and in particular exclusively, the respective additional weld point or weld seam is designed as a through weld for axial shrinkage.

[0019] It is particularly preferred that at least one of the weld seams is produced circumferentially. The advantage of producing a circumferential weld seam is that the heat input and the overall joint are uniform. In particular, the weld seam is produced continuously around the entire circumference.

[0020] According to a preferred embodiment of the invention, at least one of the welds, particularly in the longitudinal and / or circumferential direction of the sleeve, is produced only in sections. By producing the weld only in sections, it is advantageously ensured that the heat input is reduced. In particular, a weld is produced that runs circumferentially but is interrupted at least at one point. For example, correspondingly symmetrical sections of R.410742 are distributed around the circumferential direction.

[0021] - 5 - interrupted welds are produced. In particular, a weld extending only in the circumferential direction is produced. For example, a plurality of circumferentially spaced welds, preferably arranged uniformly around the circumference of the section and each extending only in the longitudinal direction, are produced. Particularly preferably, at least one corresponding weld is produced extending both circumferentially and longitudinally, for example, in a spiral shape.

[0022] Particularly preferred is the production of a multitude of weld points and / or weld seams on the sleeve wall, especially those evenly distributed in the longitudinal and / or circumferential direction of the sleeve. The production of such a multitude of weld points and / or weld seams offers the advantage of a particularly secure connection between the section and the sleeve. The weld seams themselves run, in particular, only in the longitudinal direction, only in the circumferential direction, or in both the longitudinal and circumferential directions, for example, in a spiral pattern, as described above.

[0023] According to a preferred embodiment of the invention, the number of weld points and / or weld seams is determined depending on a predetermined clamping force acting on the first component. Determining the number in this way advantageously ensures that the clamping force is reliably achieved and that the first component is fastened without play.

[0024] The component arrangement with the features of claim 11 comprises a first component and a second component. It is characterized in that the components are attached to one another by the method according to the invention. This results in the advantages already mentioned.

[0025] Particularly preferred is / are the first component configured as a magnetic element and / or the second component as a shaft. With such a configuration, the advantages of the inventive method are particularly pronounced because the magnetic element and the shaft cannot usually be directly joined by a material bond, at least not by welding. The magnetic element is, in particular, a sensor element of a rotor position sensor, and the shaft is a rotor shaft of an electric machine. R.410742

[0026] - 6 -

[0027] According to a preferred embodiment of the invention, the sleeve-shaped section is formed integrally with the shaft at one end of the shaft. This integral construction results in a particularly simple geometric design for the shaft. The sleeve-shaped section is formed by a corresponding recess in the shaft end.

[0028] The sleeve-shaped section is particularly preferably connected to a shaft end, especially by being pushed onto the shaft end with a diameter step. Such a connection of the section to the shaft end offers the advantage that the section can be manufactured flexibly, independently of the shaft, and easily adapted geometrically to the first component, especially the magnetic element. The sleeve-shaped section is thus designed as a separate, additional sleeve in the form of an intermediate sleeve.

[0029] Further preferred features and combinations of features will become apparent from the foregoing and from the claims. The invention will now be explained in more detail with reference to the drawings. These drawings show...

[0030] Figure 1 shows an advantageous component arrangement, and

[0031] Figure 2 shows a method for attaching two components of the component arrangement to each other.

[0032] Figure 1 shows an advantageous component arrangement 1. The component arrangement 1 has a first component 2 and a second component 3. The first component 2 is shown here, for illustrative purposes only, as a magnetic element 2 and the second component 3 as a shaft 3. However, the geometry and design of components 2 and 3 are not crucial for the method to be described.

[0033] The second component 3 has a sleeve-shaped section 4. Here, the sleeve-shaped section 4 is connected to a shaft end 6 of the shaft 3 by being pushed onto the shaft end 6 with a diameter step 5. R.410742

[0034] - 7 -

[0035] The sleeve-shaped section 4 has a first cross-section adapted to the second component or the shaft end at the diameter step 5. According to a further embodiment (not shown), the sleeve-shaped section 4 is formed integrally with the shaft 3 at the shaft end 6.

[0036] The sleeve-shaped section 4 has a first end face 7. The first component 2 is inserted into the sleeve-shaped section 4 such that its first surface 8 faces the first end face 7, in this case touching the end face 7 at least partially, for example in an annular shape.

[0037] The first component 2 is accordingly oriented towards the first surface 8 and also towards the wave end 6.

[0038] The sleeve-shaped section 4 has, in a region adjacent to the diameter step 5 and assigned to the first component 2, a second cross-section adapted to the first component 2, which differs from the first cross-section and is larger in this case.

[0039] Finally, the component arrangement 1 also includes a sleeve 9 with a second end face 10, which is pushed onto the sleeve-shaped section 4 in such a way that the first component 2, with a second surface 11 facing away from the first surface 8, is oriented towards the second end face 10, in this case contacting the second end face 10 at least partially, for example in an annular shape. The first component 2 is accordingly oriented with its second surface 10 away from the shaft end 6.

[0040] On a shell wall 12 of the sleeve 9, at least one spot weld 13 and / or a weld seam 13, as well as at least one further spot weld 14 and / or a further weld seam 14, are formed. This secures the sleeve 9 to the sleeve-shaped section 4 and clamps the first component 2 between the two end faces 7, 10, and firmly attaches it to the first component 3. This is achieved by the specific formation and arrangement of the spot welds / weld seams 13, 14. R.410742

[0041] - 8 -

[0042] The following describes, with reference to Figure 2, an advantageous method for attaching the first component 2 to the second component 3, which results in the component arrangement 1 shown in Figure 1. Figure 2 illustrates the method using a flowchart. In particular, the method ensures that the first component 2 is positively locked to the second component 3.

[0043] In step S1, the process begins by providing the second component 3 and the sleeve-shaped section 4. The sleeve-shaped section 4 is then connected to the second component 3, in this case by sliding it onto the second component 3 with the diameter step 5. Alternatively, the sleeve-shaped section 4 is formed integrally with the second component 3, as described above.

[0044] In step S2, the first component 2 is provided and inserted into the sleeve-shaped section 4 such that the first component 2 faces a first end face 7 of the section 4 with its first surface 8, and in particular, at least partially touches the end face 7. At this point in the process, it is not absolutely necessary for the end face 7 and the surface 8 to actually touch, provided the distance between them is sufficiently small.

[0045] In step S3, the sleeve 9 is provided and pushed onto the sleeve-shaped section 4 such that the first component 2 with the second surface 11 faces the second end face 10 of the sleeve 9, and in particular, at least partially touches the second end face 10. For example, the sleeve 9 is pushed onto the sleeve-shaped section 4 far enough that the end faces 7, 10 and the surfaces 8, 11 touch each other. However, even at this point in the process, it is not absolutely necessary that the end face 10 and the surface 11 or the end face 7 and the surface 8 actually touch, provided the distance between them is sufficiently small.

[0046] In step S4, at least one weld point 13 and / or at least one weld seam 13 is axially spaced from the second end face 10 on R.410742

[0047] - 9 - the sheath wall 12 of the sleeve 9 is manufactured to attach the sleeve 9 to the sleeve-shaped section 4.

[0048] Finally, in step S5, at least one further weld point 14 and / or at least one further weld seam 14 is produced axially between the weld point 13 and / or the weld seam 13 and the second end face 10 on the shell wall 12 in such a way that the first component 2 is clamped between the first and the second end face 7, 10 by the axial shrinkage of the sleeve 9, which is visualized in Figure 1 by corresponding arrows 15, when the further weld point 14 and / or the further weld seam 14 cools, with the first component 2 now at the latest with its respective surfaces 8, 11 in contact with the respective end face 7, 10.

[0049] Preferably, at least one, and in particular each, of the weld points 13, 14 and / or one, and in particular each, of the weld seams 13, 14 is produced by laser welding or laser shrinking. Particularly preferably, the number of weld points 13, 14 and / or weld seams 13, 14 is determined depending on a predetermined clamping force acting on the first component 2.

[0050] In particular, at least one of the weld points 13, 14 and / or one of the weld seams 13, 14 is produced as a through weld. In the present example, weld point 13 or weld seam 13 is produced as a through weld. Alternatively or additionally, at least one of the weld points 13, 14 and / or one of the weld seams 13, 14 is produced as a blind weld. In the present example, weld point 14 or weld seam 14 is produced as a blind weld.

[0051] The geometry and arrangement of spot welds 13, 14 and / or welds 13, 14 are freely selectable. The welds 13, 14 can be produced circumferentially or, in particular in the longitudinal and / or circumferential direction of the sleeve 9, only section by section. A plurality of spot welds 13, 14 and / or welds 13, 14, in particular evenly distributed in the longitudinal and / or circumferential direction of the sleeve 9, can also be produced on the shell wall 12, in particular depending on the requirements of R.410742.

[0052] - 10 - the clamping force to be achieved, the permissible heat input and / or the available installation space.

Claims

1. R.410742 - 11 - Claims 1. Method for attaching a first component (2) to a second component (3), wherein the first component (2) is inserted into a sleeve-shaped section (4) of the second component (3) such that the first component (2) faces a first surface (8) of a first end face (7) of the section (4), in particular contacting the end face (7) at least partially, wherein a sleeve (9) is pushed onto the sleeve-shaped section (4) such that the first component (2) faces a first surface (8) of the section (4), in particular contacting the end face (7) at least partially, and wherein a sleeve (9) is pushed onto the sleeve-shaped section (4) such that the first component (2) faces a first surface (8) of the section (4) (8) facing away from the second surface (11) of a second end face (10) of the sleeve (9), in particular contacting the second end face (10) at least partially, wherein at least one spot weld (13) and / or a weld seam (13) is produced axially spaced from the second end face (10) on a shell wall (12) of the sleeve (9) in order to attach the sleeve (9) to the sleeve-shaped section (4), and wherein at least one further spot weld (14) and / or a weld seam (14) is produced axially between the spot weld (13) and / or the weld seam (13) and the second end face (10) on the shell wall (12) such that the first component (2) is formed by the axial shrinkage of the sleeve (9) is trapped when the further weld point (14) and / or the further weld seam (14) between the first and the second end face (7,10) cools down.

2. Method according to claim 1, characterized in that the sleeve-shaped section (4) is formed integrally with the second component (3). R.410742 - 12 - 3. Method according to claim 1, characterized in that the sleeve-shaped section (4) is connected to the second component (3), in particular by being pushed onto the second component (3) with a diameter step (5).

4. Method according to one of the preceding claims, characterized in that at least one of the weld points (13,14) and / or one of the weld seams (13,14) is produced by means of laser welding or laser shrinking.

5. Method according to one of the preceding claims, characterized in that at least one of the weld points (13,14) and / or one of the weld seams (13,14) is produced as a through weld.

6. Method according to one of the preceding claims, characterized in that at least one of the weld points (13,14) and / or one of the weld seams (13,14) is produced as a blind weld.

7. Method according to one of the preceding claims, characterized in that at least one of the weld seams (13, 14) is produced circumferentially.

8. Method according to one of the preceding claims, characterized in that at least one of the welds (13, 14), in particular in the longitudinal and / or circumferential direction of the sleeve (9), is produced only section by section.

9. Method according to one of the preceding claims, characterized in that a plurality of weld points (13,14) and / or weld seams (13,14) are produced on the shell wall (12), in particular arranged uniformly in the longitudinal and / or circumferential direction of the sleeve (9).

10. Method according to one of the preceding claims, characterized in that a number of the weld points (13, 14) and / or R.410742 - 13 - Weld seams (13,14) are determined as a function of a predetermined clamping force acting on the first component (2).

11. Component arrangement (1), comprising a first component (2) and a second component (3), characterized in that the components (2,3) are attached to one another by a method according to one of the preceding claims.

12. Component arrangement according to claim 11, characterized in that the first component (2) is / are designed as a magnetic element (2) and / or the second component (3) is / are designed as a shaft (3).

13. Component arrangement according to claim 12, characterized in that the sleeve-shaped section (4) is formed integrally with the shaft (3) at a shaft end (6) of the shaft (3).

14. Component arrangement according to claim 12, characterized in that the sleeve-shaped section (4) is connected to a shaft end (6) of the shaft (3), in particular by being pushed onto the shaft end (6) with a diameter step (5).

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