Method for machining a raw component to be mounted on a finished component of a motor vehicle, raw component, electric drive, motor vehicle

Abstract

Method for machining a raw component to be mounted on a finished component of a motor vehicle, wherein the method comprises: providing the raw component, wherein the raw component has a sleeve-shaped section with an end section and a radially projecting contact section arranged on the end section for contact with the finished component, and the contact section has a side surface with a recess; rotatingly aligning the raw component by means of the recess; and machining the raw component.

Description

[0001] The present disclosure relates to a method for machining a raw component to be mounted on a finished component of a motor vehicle. The disclosure relates equally to a raw component for mounting on a finished component of a motor vehicle, an electric drive for a motor vehicle, and an electrically powered motor vehicle.

[0002] It is known in the prior art that a raw component, for example a sleeve for a stator housing, is to be mounted onto a finished component, for example the stator housing. For this purpose, the raw component and the finished component must be aligned relative to each other for assembly. In particular, a suitable orientation or rotational alignment must be achieved so that the raw component can be connected to the finished component, for example by means of bolts and / or screws.

[0003] Such a raw component can be a cast part. A raw component of this type, which can be produced using the die casting process, can have tolerances of up to tenths of a millimeter. Therefore, after initial forming, the raw component requires further machining to ensure precise assembly with the finished component. To enable machining, the raw component must be aligned. This can be achieved by machining a relatively small area of ​​the raw component's contour to create a reference surface for subsequent machining. The raw component can be probed against this reference surface for alignment.

[0004] However, machining to create the reference surface necessitates an area that is not required for the final product to be manufactured from the raw component. This requires a larger allowance in the component geometry to ensure minimum wall thicknesses and / or minimum bearing surfaces. Consequently, the raw component, and potentially the final product, requires more installation space and increases its weight. Furthermore, creating the reference surface results in increased manufacturing effort due to potentially reduced tolerances elsewhere, ultimately leading to higher production costs for the final product.

[0005] Against the background of this prior art, one objective of the present disclosure is to specify a device and a method, each of which is suitable for enriching the prior art and improving at least the aspects of the prior art mentioned above. In particular, it is the objective of the disclosure to improve the machining of the raw component and to partially prevent the aspects described above with regard to the reference surface.

[0006] The problem is solved by the features of the independent claims. The dependent claims contain further developments of the disclosure.

[0007] The problem is then solved according to one aspect of the disclosure by a method for machining a raw component to be mounted on a finished component of a motor vehicle, wherein the method comprises: providing the raw component, wherein the raw component has a sleeve-shaped section with an end section and a radially projecting contact section arranged on the end section for contact with the finished component, and the contact section has a side surface with a recess; rotatingly aligning the raw component by means of the recess; and machining the raw component.

[0008] It was recognized that it is possible to provide the raw component with the recess already present. This recess, like the reference surface in the prior art, can be used to align the raw component rotationally. Providing the recess thus avoids the need to create a reference surface. This simplifies the manufacturing of the raw component and therefore makes it more cost-effective. Since no reference surface needs to be created, the raw component contour can be essentially retained, which simplifies quality control of the final product produced from the raw component. An unnecessary allowance in the component geometry can be avoided, making the final product lighter and, due to its simpler manufacturability, more cost-effective.

[0009] Optionally, the recess defines an orientation of the raw component, and machining is performed taking this orientation into account and / or maintaining it. In this way, the recess is assigned a well-defined orientation that can be used for machining. In other words, the recess defines a reference system that is used during machining.

[0010] Optionally, the recess has two surfaces extending radially inwards from the side surface; and alignment is achieved using these surfaces. It was found that two radially inwards extending surfaces reliably enable rotational alignment, with a first surface restricting the rotational alignment in a first direction of rotation and a second surface restricting the rotational alignment in a second direction of rotation different from the first.

[0011] Optionally, the recess can be at least partially V-shaped, U-shaped, and / or rectangular. This allows for a recess in the form of a groove in the side surface, enabling reliable and effective alignment.

[0012] Optionally, alignment is achieved using a probe that scans the recess, in particular a dowel pin. The probe or dowel pin can define an alignment in the same axis of the reference system as for the mechanical machining.

[0013] Optionally, the machining process includes chip removal of the recess. This leaves the side surface and the mating section unchanged after machining. Alternatively or additionally, the finished component includes a contour that must be aligned with the mating section; and the machining of the raw component is carried out according to this contour. This allows the raw component to be manufactured into the final product, which can then be assembled with the finished component.

[0014] Optionally, the raw component is a sleeve for a stator housing of an electric vehicle drive, and the finished part is the stator housing itself. It was recognized that the sleeve and the stator housing represent an application where reliable rotational alignment is particularly advantageous.

[0015] According to one aspect of the disclosure, a raw component is provided for assembly onto a finished component of a motor vehicle, wherein the raw component has a sleeve-shaped section with an end section and a radially projecting contact section arranged on the sleeve-shaped section for contact with the finished component, and the contact section has a side surface with a recess for rotationally aligning the raw component. Optionally, the raw component has one or more of the features described as optional and / or advantageous with regard to the method in order to achieve an associated technical effect.

[0016] According to one aspect of the disclosure, an electric drive for a motor vehicle is provided, comprising a stator housing and the described shell-type component. Optionally, the electric drive and / or the shell-type component may have one or more of the features described as optional and / or advantageous with respect to the method in order to achieve a related technical effect.

[0017] According to one aspect of the disclosure, an electrically powered motor vehicle, comprising the described electric drive, is provided. Optionally, the motor vehicle, its electric drive, and / or its body shell may have one or more of the features described as optional and / or advantageous with respect to the method in order to achieve a related technical effect.

[0018] One embodiment of each is described below with reference to the figures. Fig. Figure 1 schematically shows a motor vehicle according to one aspect of the revelation; Fig. 2 schematically shows a flowchart of a procedure according to an aspect of the revelation; Fig. 3 shows components of an electric drive according to one aspect of the disclosure; Fig. Figure 4 schematically shows a cross-section of a raw component; Fig. Figure 5 schematically shows a detail of a cross-section of a raw component; Fig. Figure 6 schematically shows a detail of a cross-section of a raw component according to one aspect of the disclosure before processing according to a method according to one aspect of the disclosure; and Fig. Figure 7 schematically shows a detail of a cross-section of a raw component according to one aspect of the disclosure after processing according to a method according to one aspect of the disclosure.

[0019] Fig. Figure 1 schematically shows a motor vehicle 50 according to one aspect of the disclosure. The motor vehicle 50 is a land vehicle. The motor vehicle 50 is a passenger car.

[0020] The motor vehicle 50 has an electric drive 52 and an energy storage device 55, also referred to as a traction battery. The energy storage device 55 is configured to provide electrical energy for operating the motor vehicle 50 and / or the electric drive 52. The electric drive 52 is configured to receive the electrical energy and convert it into kinetic energy. Optionally, the electric drive 52 can be configured for regenerative braking or recuperation in order to convert kinetic energy into electrical energy.

[0021] The electric drive has a stator 54 (see Fig. 3) The stator 54 is arranged in a stator housing 53 in the assembled state. A sleeve 60a, arranged between the stator 54 and the stator housing 53 in the assembled state, serves to position the stator 54 and / or to provide cooling for the stator 54 or for the electric drive 52.

[0022] Fig. Figure 2 schematically shows a flowchart of a procedure 100 according to one aspect of the disclosure. The procedure 100 according to Fig. 2 is a method 100 for machining a raw component 60 to be mounted on a finished component 70 of a motor vehicle 50. The raw component 60 is a sleeve 60a for a stator housing 53 of an electric drive 52 of the motor vehicle 50, and the finished component 70 is the stator housing 53. Such a motor vehicle 50, such an electric drive 52, such a sleeve 60a, and such a stator housing 53 are related to Fig. 1 described. Fig. 2 is referred to Fig. 1 described.

[0023] The procedure 100 according to Fig. 2 indicates: Provision 110 of the raw component 60. The raw component 60 has a sleeve-shaped section 61 with an end section 61a (see Fig. 3) The structural component 60 has a radially projecting support section 62 arranged at the end section 61a for connection to the finished component 70 (see Fig. 3) The finished component 70 comprises a contour 71 to be brought into alignment with the plant section 62 (see Fig. 3).

[0024] The plant section 62 has a side surface 63 with a recess 64 (see Fig. 6) The recess 64 defines an orientation O of the structural component 60. The recess 64 is at least partially V-shaped, U-shaped, and / or rectangular. The recess 64 has two surfaces 65 extending radially inward from the side surface 63 (see Fig. 6).

[0025] Method 100 comprises: rotary alignment 120 of the raw component 60 based on the recess 64. The alignment 120 is carried out based on the surfaces 65. The alignment 120 is carried out by a sensing device scanning the recess 64, in particular by a dowel pin.

[0026] Procedure 100 comprises: Machining 130 of the raw component 60. Machining 130 is carried out taking into account and / or maintaining the orientation O. Machining 130 includes machining the recess 64 (see Fig. 7) The machining 120 of the raw component 60 is carried out according to the contour 71 (see Fig. 7).

[0027] The expert recognizes that the procedure 100 according to Fig. 2. The procedure can also be carried out in a different order than shown. In particular, it is possible for steps of procedure 100 to be repeated and / or carried out simultaneously.

[0028] Fig. Figure 3 shows components of an electric drive 52 according to one aspect of the disclosure. Such an electric drive 52 is related to Fig. 1 described and characteristics of the components are with reference to Fig. 1 and Fig. 2 described. Fig. 3 is referred to Fig. 1 and Fig. 2 described.

[0029] Fig. Figure 3 shows a stator housing 53, which is available as a finished component 70. The stator 54 is arranged in the stator housing 53 in the assembled state. The sleeve 60a is arranged between the stator housing 54 and the stator in the assembled state. The sleeve 60a is an end product and is manufactured according to method 100. Fig. 2 and optionally further steps to manufacture from the raw component 60.

[0030] As in Fig. As illustrated in Figure 3, the raw component 60 has a sleeve-shaped section 61 with an end section 61a. In other words, the raw component 60 defines an axis A along which the sleeve-shaped section 61 extends. The axis A thus defines a radial direction perpendicular to the axis A (not shown). The end section 61a therefore forms an end of the raw component 60, or rather of the sleeve-shaped section 61, along the axis A. The raw component 60 has a radially projecting contact section 62 arranged at the end section 61a for contact with the finished component 70. The contact section 62 thus projects radially outwards from the end section 61a.

[0031] The finished component 70 comprises a contour 71 to be brought into alignment with the plant section 62. The contour 71 includes, in particular, radially extending surfaces or sections of the finished component 70.

[0032] Fig. Figure 4 schematically shows a cross-section of a raw component 60. The raw component 60 according to Fig. 4 is a raw component in accordance with the state of the art. Fig. Figure 4 shows a cross-section through an end section 61a. The raw component 60 has the attachment section 62 and the side surface 63. For rotational alignment about the axis A, which is perpendicular to the drawing plane, or for defining an orientation O, a reference surface is incorporated into the side surface 63 (not shown).

[0033] Fig. Figure 5 schematically shows a detail of a cross-section of a raw component 60. The raw component 60 is the one relating to Fig. 4 described raw component 60. Fig. 5 is referred to Fig. 4 described. Fig. Figure 5 shows in particular the side surface 63 and the plant section 62.

[0034] Fig. Figure 6 schematically shows a detail of a cross-section of a raw component 60 according to one aspect of the disclosure before processing 130 according to a method 100 according to one aspect of the disclosure. The raw component 60 according to Fig. 6 is related to Fig. 1, Fig. 2 to Fig. The described structural component 60 and the procedure 100 are related to Fig. 2 described procedures 100. Fig. 6 is referred to Fig. 1, Fig. 2 to Fig. 3 described. Fig. Figure 6 shows in detail the plant section 62 with the side surface 63, whereby the raw component 60 is arranged according to Fig. 6 of the raw component 60 according to Fig. 4 and Fig. 5 only differs in section 62 of the plant.

[0035] The structural component 60 according to Fig. Section 6 has a radially projecting contact section 62 arranged at the end section 61a for contact with the finished component 70. The contact section 62 has a side surface 63 with a recess 64. The side surface 63 defines the radially outer contour of the contact section 62. The recess 64 is a depression in the side surface 63. The recess 64 is V-shaped. The recess 64 has two surfaces 65 extending radially inward from the side surface 63. The surfaces 65 touch at a radially innermost section of the recess 64. In another embodiment (not shown), the recess is, for example, U-shaped or rectangular, and the surfaces 65 are spaced apart from each other by a base surface. The recess 64 defines, or rather the surfaces 65 define, an orientation O of the structural component 60. The surfaces 65 or the recess 64 enable the alignment 120 of the structural component 60.The surfaces 65 and the recess 64 are designed to be scanned by a sensing device, in particular by a dowel pin.

[0036] Fig. Figure 7 schematically shows a detail of a cross-section of a raw component 60 according to one aspect of the disclosure after processing 130 according to a method 100 according to one aspect of the disclosure. The raw component 60 according to Fig. 7 is the one in relation to Fig. The structural component 60 described in sections 1 to 3 and 6, and the method 100, are related to Fig. 2 described procedures. Fig. 7 is referred to Fig. 1 to 3 and 6 described.

[0037] Fig.Figure 7 schematically illustrates the raw component 60 after machining 130. Machining 130 was performed taking into account and / or maintaining the orientation O, which was defined according to alignment 120. Machining 130 comprises machining the recess 64. In doing so, one or both of the surfaces 65 are modified. Machining 120 of the raw component 60 is carried out according to contour 71. After machining 120, the raw component 60 can be formed as a finished product that forms the sleeve 60a. Reference symbol (part of the description) 50 motor vehicles 52 electric drive 53 Stator housings 54 Stator 60 Raw component 60a sleeve 61 sleeve-shaped section 61a End section 62 Plant section 63 side surface 64 Exclusion 65 area 70 prefabricated part 71 contour 100 procedures 110 Provide 120 Align 130 Edit Axis Orientation

Claims

[1] Method (100) for machining a raw component (60) to be mounted on a finished component (70) of a motor vehicle (50), wherein the method (100) comprises: - Providing (110) the raw component (60), wherein the raw component (60) has a sleeve-shaped section (61) with an end section (61a) and a radially projecting attachment section (62) arranged on the end section (61a) for attachment to the finished component (70), and the attachment section (62) has a side surface (63) with a recess (64); - rotational alignment (120) of the raw component (60) using the recess (64); and - Processing (130) of the raw component (60). [2] Method (100) according to claim 1, wherein - the recess (64) defines an orientation (O) of the raw component (60), and - the processing (130) is carried out taking into account and / or maintaining the orientation (O). [3] Method (100) according to claim 1 or 2, wherein - the recess (64) has two surfaces (65) extending radially inwards from the side surface (63); and - the alignment (120) is carried out using the surfaces (65). [4] Method (100) according to any of the preceding claims, wherein the recess (64) is at least partially V-shaped, U-shaped and / or rectangular. [5] Method (100) according to one of the preceding claims, wherein the alignment (120) is carried out by a sensing device scanning the recess (64), in particular by a dowel pin. [6] Method (100) according to any one of the preceding claims, wherein - the machining (130) includes machining of the recess (64); and / or - the finished component (70) comprises a contour (71) to be brought into alignment with the plant section (62); and the processing (120) of the raw component (60) is carried out according to the contour (71). [7] Method (100) according to one of the preceding claims, wherein the raw component (60) is a sleeve (60a) for a stator housing (53) of an electric drive (52) of the motor vehicle (50) and the finished component (70) is the stator housing (53). [8] Raw component (60) for assembly onto a finished component (70) of a motor vehicle (50), wherein the raw component (60) has a sleeve-shaped section (61) with an end section (61a) and a radially projecting contact section (62) arranged on the sleeve-shaped section (61) for contact with the finished component (70), and the contact section (62) has a side surface (63) with a recess (64) for rotationally aligning (110) the raw component (60). [9] Electric drive (52) for a motor vehicle (50), comprising a stator housing (53) and the raw component (9) designed as a sleeve (60a) according to claim 8. [10] Electrically powered motor vehicle (50) comprising the electric drive (52) according to claim 9.

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