METHOD FOR PRODUCING A SLEEVE-LIKE PASSAGE

Abstract

The disclosure comprises a method for producing a sleeve-like passage for a bearing accommodation in a metallic wheel control arm of a vehicle. The method may include placing a wheel control arm end of the wheel control arm onto a pressing plate of a pressing tool; and forming a tapered wall in the wheel control arm end and a circumferential collar around the tapered wall in the wheel control arm end, wherein the forming comprises pressing the wheel control arm end against the pressing plate using a pressing punch, wherein a volume of metal of the wheel control arm end is displaced into a circumferential cavity due to the pressing of the wheel control arm end against the pressing plate,; and perforating the tapered wall to obtain the sleeve-like passage.

Claims

1. A method for producing a sleeve-like passage for a bearing accommodation in a metallic wheel control arm of a vehicle, comprising: placing a wheel control arm end of the wheel control arm onto a pressing plate of a pressing tool; and forming a tapered wail in the wheel control arm end and a circumferential collar around the tapered wall in the wheel control arm end, wherein the forming comprises pressing the wheel control arm end against the pressing plate using a pressing punch of the pressing tool, wherein a volume of metal of the wheel control arm end is displaced into a circumferential cavity around the pressing plate due to the pressing of the wheel control arm end against the pressing plate; and perforating the tapered wall to obtain the sleeve-like passage,

2. The method according to claim 1, wherein the pressing punch acts on the wheel control arm end in a direction of the pressing plate.

3. The method according to claim 1, wherein the wheel is shaped from a single-piece extruded profile.

4. The method according to claim 3, wherein the single-piece extruded profile is an aluminum extruded profile.

5. The method according to claim 1, wherein perforating the tapered wall comprises drilling or punching the tapered wall.

6. The method according to claim 1, wherein the circumferential collar forms a front side of the sleeve-like passage,

7. The method according to claim 1, wherein the circumferential cavity is delimited at least in sections by a curved delimitation wall configured to prevent a lateral displacement of the volume of metal, and the method further comprises: displacing a volume of metal beyond the circumferential cavity using the pressing punch; and pressing the volume of metal against the curved delimitation wall to obtain a curved outer wall of the sleeve-like passage.

8. The method according to claim 7, wherein the curved delimitation wall is curved at least in sections in the shape of an arc or in the shape of a circle.

9. The method according to claim 7, further comprising: displacing the volume of metal against the curved delimitation wall to increase an outer diameter of the sleeve-like passage transversely to a wheel control arm axis, wherein the wheel control arm bulges out laterally.

10. The method according to claim 1, wherein the pressing plate forms a flat support for the wheel control arm end, and wherein the tapered wall assumes the geometric shape of the flat support due to the pressing with the pressing punch.

11. The method according to claim 10, wherein the flat support comprises a flat and circular support for the wheel control arm end.

12. The method according to claim 1, wherein the wheel control arm end is cold reshaped by the pressing punch.

13. The method according to claim 1, wherein the wheel control arm comprises an additional wheel control arm end arranged parallel to the wheel control arm end, wherein the method further comprises: placing the additional wheel control arm end of the wheel control arm onto the pressing plate; and pressing the additional wheel control arm end against the pressing plate using the pressing punch, wherein a volume of metal of the additional wheel control arm end is displaced into the circumferential cavity due to the pressing of the additional wheel control arm end against the pressing plate, whereby an additional tapered wall and an additional circumferential collar around the additional tapered wall are formed in the additional wheel control arm end; and perforating the tapered wall to obtain an additional sleeve-like passage, wherein the sleeve-like passage and the additional sleeve-like passage each form a bearing sleeve.

14. The method according to claim 1, wherein the respective wheel control arm end is placed onto the pressing plate without perforation.

15. The method according to claim 1, wherein the pressing is carried out in a pressing process.

16. The method according to claim 15, wherein the perforation is carried out in a perforation process after the pressing process.

17. A pressing tool for producing a sleeve-like passage for a bearing accommodation in a metallic wheel control arm of a vehicle, comprising: a pressing plate configured for placement of the wheel control arm; a circumferential cavity around the pressing plate; a pressing punch configured to press a wheel control arm end against the pressing plate to displace a volume of metal of the wheel control arm end into the circumferential cavity to form, in the wheel control arm end, a tapered wall and a circumferential collar around the tapered wall.

18. The pressing tool according to claim 17, wherein the circumferential cavity is delimited at least in sections by a curved delimitation wall to shape a curved outer wall of the sleeve-like passage by pressing the pressing punch.

19. The pressing tool according to claim 17, further comprising: a punch configured to perforate the tapered wall.

20. The pressing tool according to claim 17, wherein the circumferential collar forms a front side of the sleeve-like passage

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Examples of the present disclosure are explained in further detail in reference to the appended drawings.

[0058] FIG. 1 represents a method according to an example;

[0059] FIG. 2 represents a pressing tool according to an example; and

[0060] FIG. 3 represents a pressing tool according to an example.

DETAILED DESCRIPTION

[0061] FIG. 1 shows a diagrammatic representation of a method 100 for producing a sleeve-like passage 101 for the bearing accommodation in a wheel control arm 103 of a vehicle, with the aid of a pressing tool 105. The wheel control arm 103 is produced from a metal, and the pressing tool 105 comprises a pressing plate 107 and a circumferential cavity 109 around the pressing plate 107. The method 100 comprises a placement 111 of a wheel control arm end 115 of the wheel control arm 103 onto the pressing plate 107, and a pressing 113 of the wheel control arm end 115 against the pressing plate 107 by means of a pressing punch 117, Due to the pressing 113 of the wheel control arm end 115 against the pressing plate 107, a volume of metal of the wheel control arm end 115 is displaced into the circumferential cavity 109, whereby, in the wheel control arm end 115, a tapered wall 119 and a circumferential collar 123 around the tapered wall 119 are formed, Moreover, the method 100 comprises a perforation 121 of the tapered wall 119 in order to obtain the sleeve-like passage 101. FIG. 1 is a cross-sectional view through the pressing tool 105 and the wheel control arm 103, wherein the wheel control arm longitudinal axis 205 forms a surface normal of the cross-sectional plane.

[0062] The circumferential cavity 109 has a triangular cross section and is designed as circular, The pressing punch 117 is also designed as circular, wherein the diameter of the pressing punch 117 is smaller than or equal to the inner diameter of the circumferential cavity 109.

[0063] The volume of metal displaced by the pressing 113 of the wheel control arm end 115 against the pressing plate 107 forms the circumferential collar 123 which protrudes on both sides of the sleeve-like passage 101 from the wheel control arm 103. An inner surface of the circumferential collar 123 forms a front side 125 of the sleeve-like passage 101, wherein the front side 125 delimits the sleeve-like passage 101. The front side 125 provides a contact area for introducing a bearing into the sleeve-like passage 101.

[0064] FIG. 2 shows a diagrammatic view of the pressing tool 105 for the production of a sleeve-like passage 101 for the bearing accommodation in a wheel control arm 103 of a vehicle. The pressing tool 105 has a pressing plate 107 onto which a wheel control arm end 115 can be placed. Moreover, the pressing tool 105 comprises a circumferential cavity 109 around the pressing plate 107, and a pressing punch 117 for the pressing 113 of the wheel control arm end 115 against the pressing plate 107, in order to displace a volume of metal of the wheel control arm end 115 into the circumferential cavity 109 and thereby form, in the wheel control arm end 115, a tapered wall 119 and a circumferential collar 123 around the tapered wall 119. A wheel control arm end 115 is placed onto the pressing plate 107. The wheel control arm 103 has a T-shaped cross section along the wheel control arm longitudinal axis 205, wherein the sleeve-like passage 101 is introduced in the long arm of the T-shape.

[0065] The circumferential cavity 109 is delimited at least in sections by a curved delimitation wall 201 in order to prevent a lateral displacement of the volume of metal, wherein the volume of metal is displaced by the pressing punch 117 beyond the circumferential cavity 109 and pressed against the curved delimitation wall 201 in order to obtain a curved outer wall 203 of the sleeve-like passage 101.

[0066] The curved delimitation wall 201 is curved at least in sections in the shape of an arc or in the shape of a circle.

[0067] The wheel control arm end 115 bulges out laterally by a displacement of the volume of metal against the curved delimitation wall 201 in order to increase an outer diameter of the sleeve-like passage 101 transversely to the wheel control arm longitudinal axis 205.

[0068] The pressing plate 107 forms a flat and circular support for the wheel control arm end 115, and, due to the pressing 113 with the pressing punch 117, the tapered wall 119 assumes the geometric shape of the flat support.

[0069] In the depicted position of the pressing tool 105, the wheel control arm 103 has already been reshaped, so that the volume of metal has been displaced and reshaped to form the circumferential collar 123.

[0070] The pressing tool 105 has an additional circumferential cavity 207 which delimits the pressing punch 117. The volume of metal is displaced into the circumferential cavity 109 and the additional circumferential cavity 207, so that both on the pressing punch side and also on the pressing plate side, in the wheel control arm end 115, a circumferential collar 123 is formed, which protrudes from the wheel control arm end 115.

[0071] The additional circumferential cavity 207 has a height that decreases continuously with increasing distance from the pressing punch 117, wherein the decrease of the height with respect to the distance from the pressing punch 117 is not linear. In particular, in a first area close to the pressing punch 117, an area with constant height of the additional circumferential cavity 207 is formed.

[0072] FIG. 3 shows a diagrammatic view of the pressing tool 105 for the production of a sleeve-like passage 101 for the bearing accommodation in a wheel control arm 103 of a vehicle. The pressing tool 105 has a pressing plate 107 onto which a wheel control arm end 115 can be placed. Moreover, the pressing tool 105 has a circumferential cavity 109 around the pressing plate 107, and a pressing punch 117 for the pressing 113 of the wheel control arm end 115 against the pressing plate 107, in order to displace a volume of metal of the wheel control arm end 115 into the circumferential cavity 109 and thereby form, in the wheel control arm end 115, a tapered wall 119 and circumferential a collar 123 around the tapered wall 119.

[0073] In the depicted position of the pressing tool 105, the wheel control arm end 115 is placed onto the pressing plate 107, and a subsequent lowering of the pressing punch 117 into the wheel control arm end 115 produces a displacement of the volume of metal, The outer wall 203 is not deformed before the pressing 113, in particular is not curved, so that the wheel control arm end 115 has a rectangular profile.

[0074] The circumferential cavity 109 and the pressing punch 117 are designed as circular, wherein the circumferential cavity 109 has an inner diameter which is at least equal to or greater than a diameter of the pressing punch 117. Thus, material of the wheel control arm end 115 is not displaced directly in the direction of the force exertion by the pressing punch 117 into the circumferential cavity 109, but is rather displaced laterally with a thickness reduction of the wheel control arm end 115.

LIST OF REFERENCE NUMBERS

[0075] 100 Method

[0076] 101 Sleeve-like passage

[0077] 103 Wheel control arm

[0078] 105 Pressing tool

[0079] 107 Pressing plate

[0080] 109 Circumferential cavity

[0081] 111 Placement

[0082] 113 Pressing

[0083] 115 Wheel control arm end

[0084] 117 Pressing punch

[0085] 119 Tapered wall

[0086] 121 Perforation

[0087] 123 Circumferential collar

[0088] 125 Front side

[0089] 201 Curved delimitation wall

[0090] 203 Outer wall

[0091] 205 Wheel control arm longitudinal axis

[0092] 207 Circumferential cavity