Joining arrangement and method for producing a joining arrangement

Abstract

The invention relates to a joining arrangement (1) with a hardened hollow embossing (10) which has a hollow body (12) open at one end and a setting head (14) closing the hollow body (12) at an opposite other end, and a base body (30) made of a softer material into which the hardened hollow embossing (10) is pressed, displacing the softer material of the base body (30), wherein the hollow body (12) of the hardened hollow embossing (10) forms a receiving space (19) which receives the displaced softer material of the base body (30), and a method for producing such a joining arrangement (1).

Description

[0001] The invention relates to a joining arrangement. The present invention also relates to a method for manufacturing such a joining arrangement.

[0002] It is known from the prior art to attach components to an aluminum hydraulic power unit using screws or press-fit elements, such as press-fit bolts. This usually requires blind holes or interfaces, which are created in the hydraulic power unit through machining, a costly and / or time-consuming process.

[0003] The additional effort required in terms of machining capabilities and measurement processes, as well as the lack of flexibility in final assembly and the high demands on positioning accuracy, can be seen as disadvantages. Disclosure of the invention

[0004] The joining arrangement with the features of independent claim 1 has the advantage that fastening points for functional elements, such as threaded supports, clip points, weld points, etc., and / or electrical contact points, such as ground points, which can be used for fastening and / or electrically contacting components and / or parts, can be formed on a base body made of soft material without costly and / or time-consuming machining operations. This allows components, parts, and / or flanges to be joined universally and flexibly to a soft base body, which is, for example, made of aluminum.

[0005] In embodiments of the joining arrangement, conventional welding techniques, such as resistance spot welding or laser welding, can be used to connect steel parts to an aluminum base body of a hydraulic unit.

[0006] Embodiments of the present invention provide a joining arrangement with a hardened hollow stamping die, which has a hollow body open at one end and a setting head closing the hollow body at the opposite end, and a base body made of a softer material, into which the hardened hollow stamping die is pressed, displacing the softer material of the base body. The hollow body of the hardened hollow stamping die forms a receiving space that receives the displaced softer material of the base body.

[0007] Furthermore, a method for manufacturing such a joining arrangement is proposed. This method comprises a hardened hollow embossing die, which has a hollow body open at one end and a setting head closing the hollow body at the opposite end, and a base body made of a softer material. The hardened hollow embossing die is positioned on the base body and pressed into it by applying an insertion force, displacing the softer material of the base body, until the setting head rests on the base body or on a component to be attached to the base body. The hollow body of the hardened hollow embossing die forms a receiving space that accommodates the displaced softer material of the base body.

[0008] The hollow stamping die is designed and cured to exhibit high resistance to deformation during pressing. The absorption of the displaced, softer material within the hollow body's receiving space results in less deformation at adjacent interfaces.

[0009] The measures and further developments listed in the dependent claims enable advantageous improvements to the joining arrangement specified in independent claim 1 and to the method for producing such a joining arrangement specified in independent claim 11.

[0010] A particular advantage is that at least one annular groove can be incorporated into the outer surface of the hollow body, which is filled by displaced material from the base body, thus creating a positive fit between the hollow embossed part and the base body. This results in high load-bearing capacity and a high degree of resistance to loosening, even under temperature stress.

[0011] In an advantageous embodiment of the joining arrangement, the end of the hollow body facing the setting head can be designed as an embossing ring, which is at least partially pressed into the base body. A first annular groove can be incorporated into the hollow body directly after the embossing ring, extending towards the open end of the hollow body. This allows the material of the base body displaced by the embossing ring to directly fill the first annular groove.

[0012] In a further advantageous embodiment of the joining arrangement, the hollow body can preferably be designed as a stepped cylinder with at least two different outer diameters. The embossing ring can have the largest outer diameter of the stepped cylindrical hollow body.

[0013] In a further advantageous embodiment of the joining arrangement, a component to be attached to the base body can be positioned between the setting head and the base body. In this configuration, the hollow body of the hardened hollow stamping insert extends through a mounting opening of the component to be attached, and the setting head covers the mounting opening of the component to be attached. In this embodiment, the stamping ring of the hollow stamping insert is only partially pressed into the softer base body, and the portion of the stamping ring protruding from the base body extends through the mounting opening of the component to be attached.

[0014] In an alternative embodiment of the joining arrangement, the setting head can form a weld point at which a component to be attached can be welded to the setting head by means of a resistance welding point or a laser welding point and thus be attached to the base body.

[0015] In a further alternative embodiment of the joining arrangement, the setting head can have an extension that can form a fastening point and / or a contact point for a component to be fastened and / or for an electrical component. For example, the extension can be designed as a threaded carrier or as a ball. Such a threaded carrier can, for example, be designed as a bolt connected to the setting head, onto which an external thread is applied or into which a threaded bore with an internal thread is machined.

[0016] In an advantageous embodiment of the method, the pressing force can be applied continuously or in pulses. Conventional presses can preferably be used for this purpose.

[0017] In a further advantageous embodiment of the method, heat can be generated at a contact point between the hardened hollow stamping and the base body. The generated heat facilitates the insertion of the hollow stamping and improves the flow behavior of the displaced material from the base body. Due to the resistive heating of the contact area, the material flow is essentially upwards, as surrounding material areas remain cold and solid. This allows the displaced material to shrink onto the hollow body of the hollow stamping after cooling. The heat at the contact point can be generated, for example, as frictional heat by rotating the hardened hollow stamping during insertion. Alternatively, the heat at the contact point can be generated by introducing an electric current or by ultrasound.

[0018] Exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description. In the drawings, identical reference numerals denote components or elements that perform the same or analogous functions. Brief description of the drawings Fig. Figure 1 shows a schematic sectional view of essential components for a joining arrangement according to the invention. Fig. Figure 2 shows a schematic sectional view of a joining arrangement according to the invention with the components made of Fig. 1. Fig. Figure 3 shows a schematic sectional view of a first embodiment of a joining arrangement according to the invention. Fig. Figure 4 shows a schematic sectional view of a second embodiment of a joining arrangement according to the invention. Fig. Figure 5 shows a schematic sectional view of a third embodiment of a joining arrangement according to the invention. Fig. Figure 6 shows a schematic sectional view of a fourth embodiment of a joining arrangement according to the invention. Fig. Figure 7 shows a schematic sectional view of a fifth embodiment of a joining arrangement according to the invention. Fig. Figure 8 shows a schematic sectional view of a sixth embodiment of a joining arrangement according to the invention. Fig. Figure 9 shows a schematic flowchart of an embodiment of a method according to the invention for producing a joining arrangement. Embodiments of the invention

[0019] As from Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. As can be seen in Figure 8, the illustrated embodiments of a joining arrangement 1 according to the invention each comprise a hardened hollow stamping die 10, which has a hollow body 12 open at one end and a setting head 14 closing the hollow body 12 at an opposite end, and a base body 30 made of a softer material, into which the hardened hollow stamping die 10 is pressed, displacing the softer material of the base body 30. The hollow body 12 of the hardened hollow stamping die 10 forms a receiving space 19, which receives the displaced softer material of the base body 30.

[0020] In the illustrated embodiments, the base body 30 is designed as an aluminum base body 30A for a hydraulic unit of a vehicle braking system. The hollow stamping 10 is made of hardened steel in the illustrated embodiments and therefore exhibits high resistance to deformation during pressing.

[0021] As from Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. As can be seen further in Figure 8, in the illustrated embodiments of the hollow stamping die 10, at least one annular groove 18 is provided in the outer surface of the hollow body 12, which is filled by displaced material of the base body 30, so that a positive fit is formed between the hollow stamping die 10 and the base body 30. Furthermore, the end of the hollow body 12 facing the setting head 14 is designed as a stamping ring 16, which is at least partially pressed into the base body 30. In the illustrated embodiments of the hollow stamping die 10, the single annular groove 18 is provided in the hollow body 12 directly after the stamping ring 16, in the direction of the open end of the hollow body 12. The hollow body 12 of the illustrated embodiments of the hollow stamping die 10 is designed as a stepped cylinder with two different outer diameters. In this case, the embossing ring 16 has the largest outer diameter of the stepped cylindrical hollow body 12.An unspecified insertion ramp is formed at the open end of the hollow body 12.

[0022] As from Fig. As can be seen further in Figure 9, the illustrated embodiment of a method 100 according to the invention for producing such a joining arrangement 1 comprises a step S100 in which a hardened hollow stamping die 10 and a base body 30 made of a softer material, here aluminum, are provided. As already explained above, the hollow stamping die 10 has a hollow body 12 open at one end and a setting head 14 closing the hollow body 12 at the opposite end. In a step S110, the hardened hollow stamping die 10 is positioned on the base body 30. The completed positioning of the hollow stamping die 10 on the base body 30 is described in Fig. Figure 1 illustrates this process. In step S120, the hollow stamping die 10 is pressed into the base body 30 by applying an insertion force F, displacing the softer material of the base body 30, until the setting head 14 rests on the base body 30 or on a component 3 to be attached to the base body 30. In this process, the hollow body 12 of the hardened hollow stamping die 10 forms a receiving space 19, which receives the displaced softer material of the base body 30. Fig. 2 is the corresponding material flow MF of the softer material of the base body 30 during the pressing process into the ring groove 16 and the receiving space 19, schematically represented by arrows.

[0023] The pressing force F is applied continuously or in pulses by a conventional press (not shown). To improve material flow, heat is generated at a contact point between the hardened hollow stamping 10 and the base body 30. In the illustrated embodiment of method 100, the heat is generated as frictional heat by rotating the hardened hollow stamping 10 at the contact point. In alternative embodiments (not shown), the heat at the contact point is generated by introducing an electric current or by ultrasound.

[0024] As from Fig. As can be seen further in Figure 3, in the illustrated first embodiment of the joining arrangement 1A, a component 3 to be attached to the base body 30 is arranged between the setting head 14 of the first embodiment of the hollow stamping 10A and the base body 30. The stamping ring 16 of the hollow body 12 of the hardened hollow stamping 10A extends through a mounting opening 5 of the component 3 to be attached. Therefore, the stamping ring 16 is not completely pressed into the base body 30, and the setting head 14 of the hollow stamping 10A rests on the component 3 to be attached and covers the mounting opening 5 of the component 3 to be attached.

[0025] As from Fig. 4, Fig. 5 to Fig. As can be seen further in Figure 6, in the illustrated embodiments of the joining arrangement 1B, 1C, 1D, the setting head 14 of the corresponding second embodiment of the hollow stamping 10B forms a weld point 14A. In the illustrated embodiments of the joining arrangement 1B, 1C, 1D, the setting head 14 of the hollow stamping 10B rests on the base body 30, so that the stamping ring 16 of the hollow body 12 of the hardened hollow stamping 10B is completely pressed into the base body 30.

[0026] At the in Fig. In the third embodiment of the joining arrangement 1C shown in Figure 5, a component 3 to be fastened is welded to the setting head 14 of the hollow stamping 10B, designed as weld point 14A, by means of a resistance weld spot WSP and thus attached to the base body 30. The resistance weld spot WSP is produced by means of a resistance welding device, of which a welding electrode 7 is shown schematically.

[0027] At the in Fig. In the fourth embodiment of the joining arrangement 1D shown in Figure 6, a component 3 to be fastened is welded to the setting head 14 of the hollow stamping die 10B, designed as welding point 14A, by means of a laser welding spot LSP and thus attached to the base body 30. The laser welding spot LSP is generated by means of a laser beam 9 emitted by a laser welding device (not shown in detail).

[0028] In the Fig. 7 and Fig. In the 8 illustrated embodiments of the joining arrangement 1E, 1F, the setting head 14 of the embodiments of the hollow embossing die 10C, 10D each has an extension 20 which forms a fastening point BP and / or a contact point KP for a component 3 to be fastened and / or for an electrical component.

[0029] At the in Fig. In the fifth embodiment of the joining arrangement 1E shown in Figure 7, the extension 20 on the third embodiment of the hollow stamping 10C shown is designed as a threaded carrier 20A. Here, the threaded carrier 20A is designed as a bolt connected to the setting head 14, onto which an external thread is applied. In an alternative embodiment of the hollow stamping 10 (not shown), a threaded bore with an internal thread is provided in the bolt connected to the setting head 14.

[0030] At the in Fig. In the sixth embodiment of the joining arrangement 1F shown in Figure 8, the extension 20 on the fourth embodiment of the hollow embossing die 10D shown is designed as a sphere 20B. Here, the sphere 20B is connected to the setting head 14 via a bridge.

[0031] Of course, other suitable embodiments of the fastening point BP and / or the contact point KP for a component 3 to be fastened and / or for an electrical component are also possible.

Claims

[1] Joining arrangement (1) with a hardened hollow embossing (10) which has a hollow body (12) open at one end and a setting head (14) closing the hollow body (12) at an opposite other end, and a base body (30) made of a softer material into which the hardened hollow embossing (10) is pressed, displacing the softer material of the base body (30), wherein the hollow body (12) of the hardened hollow embossing (10) forms a receiving space (19) which receives the displaced softer material of the base body (30). [2] Joining arrangement (1) according to claim 1, characterized by , that at least one annular groove (18) is provided in the outer surface of the hollow body (12), which is filled by displaced material of the base body (30), so that a positive fit is formed between the hollow embossed part (10) and the base body (30). [3] Joining arrangement (1) according to claim 1 or 2, characterized by, that the end of the hollow body (12) facing the setting head (14) is designed as an embossing ring (16) which is at least partially pressed into the base body (30). [4] Joining arrangement (1) according to claim 3, characterized by , that a first annular groove (18) is introduced into the hollow body (12) in the direction of the open end of the hollow body (12) directly after the embossing ring (16). [5] Joining arrangement (1) according to any one of claims 1 to 4, characterized by , that the hollow body (12) is designed as a stepped cylinder with at least two different outer diameters. [6] Joining arrangement (1) according to claim 5, characterized by , that the embossing ring (16) has the largest outer diameter of the stepped cylindrical hollow body (12). [7] Joining arrangement (1) according to any one of claims 1 to 6, characterized by, that a component (3) to be attached to the base body (30) is arranged between the setting head (14) and the base body (30), wherein the hollow body (12) of the hardened hollow stamping (10) extends through a fastening opening (5) of the component (3) to be attached and the setting head (14) covers the fastening opening (5) of the component (3) to be attached. [8] Joining arrangement (1) according to any one of claims 1 to 6, characterized by , that the setting head (14) forms a weld point (14A) at which a component (5) to be attached is welded to the setting head (14) by means of a resistance welding point (WSP) or by means of a laser welding point (LSP) and is thus attached to the base body (30). [9] Joining arrangement (1) according to any one of claims 1 to 6, characterized by, that the setting head (14) has an extension (20) which forms a fixing point (BP) and / or a contact point (KP) for a component (3) to be fixed and / or for an electrical component. [10] Joining arrangement (1) according to claim 9, characterized by that the extension (20) is designed as a threaded carrier (20A) or as a ball (20B). [11] Method (100) for manufacturing a joining arrangement (1) according to any one of claims 1 to 10, wherein a hardened hollow embossing die (10) comprising a hollow body (12) open at one end and a setting head (14) closing the hollow body (12) at an opposite other end, and a base body (30) made of a softer material are provided (S100), wherein the hardened hollow embossing die (10) is positioned on the base body (30) (S110) and pressed into the base body (30) by applying an insertion force (F) while displacing the softer material of the base body (30) (S120), until the setting head (14) rests on the base body (30) or on a component (3) to be attached to the base body (30), wherein the hollow body (12) of the hardened hollow embossing die (10) has a receiving space (19) forms which receives the displaced softer material of the base body (30). [12] Method (100) according to claim 11, characterized bythat the pressing force (F) is applied continuously or in pulses. [13] Method (100) according to claim 11 or 12, characterized by , that heat is generated at a contact point between the hardened hollow stamping (10) and the base body (30). [14] Method (100) according to claim 13, characterized by , that the heat is generated as frictional heat by rotation of the hardened hollow stamping (10) or by introducing an electric current or by ultrasound.

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