Rotatable component, tool and method for manufacturing a rotatable component

Abstract

The invention relates to a rotatable component, a tool and a method for manufacturing a rotatable component. The rotatable component comprises a wall (3), which has an inner rotating surface (4) or inner peripheral surface (5) passed through by a central longitudinal axis (Z4) in the longitudinal direction (L) and an outer rotating surface (6) or outer peripheral surface passed through by a central longitudinal axis (Z6) in the longitudinal direction (L) and arranged on the circumference of the inner rotating surface (4) or inner peripheral surface (5), wherein the central longitudinal axes (Z4, Z6) are offset relative to each other by a distance (D) in the radial direction (R) and / or the wall (3) has at least one wall notch (40) and / or at least one wall thickening (42), whereby the wall (3) does not have rotational symmetry.

Description

Technical Field

[0001] In particular, the invention relates to a rotatable component as well as a tool and a production method. Background Art

[0002] Rotatable components which can rotate about an axis of rotation during operation are known. Such components can be, for example, a wheel hub or a flywheel. In many mechanical systems, imbalances should be avoided because they lead to vibrations and increased wear, so they are balanced by means of counterweights. Counterweights are separate components and can, for example, be placed on the rotatable component itself to balance it.

[0003] However, systems are also known which do not allow for direct placement of counterweights. An example of this is an internal combustion engine. In the case of an odd number of cylinders, undesirable vibrations occur on the crankshaft. Therefore, torsional vibration dampers or dampers acting as rotors are usually also provided on the crankshaft or on the drive train to reduce vibrations, in particular torsional natural resonances of the crankshaft. By using torsional vibration dampers, smoother operation of the components connected to the torsional vibration dampers is achieved, whereby their service life is extended.

[0004] A torsional vibration damper is therefore an example of a component which has its own imbalance for compensating another component or system.

[0005] Such a torsional vibration damper is known from DE 10 2004 006 512 B4, which can rotate about an axis of rotation and comprises a hub. The imbalance is produced by means of an additional unbalanced hub as a counterweight, which is a separate component and has many disadvantages. Firstly, the unbalanced hub must be oriented during the manufacturing process. This results in an additional process step with associated time and expense. In addition, the unbalanced hub must be secured to prevent loss. This process also increases time and expense. Summary of the invention

[0006] It is therefore an object of the present invention to provide a rotatable body which has an inherent imbalance and which can be produced quickly and inexpensively.

[0007] According to the present invention, a rotatable component is proposed, which includes a wall having an inner rotating surface or an inner peripheral surface passed through by a central longitudinal axis in the longitudinal direction and an outer rotating surface or an outer peripheral surface passed through by the central longitudinal axis in the longitudinal direction and arranged on the circumferential side of the inner rotating surface or the inner peripheral surface, wherein these central longitudinal axes are radially offset from each other by a certain distance, and / or the wall has at least one wall notch and / or at least one wall thickening portion, whereby the wall does not have rotational symmetry.

[0008] The invention provides a component in a simple manner which, like this one, already has an imbalance. The imbalance can be used to offset the imbalance of another component or system and compensate for it, so that the system is balanced. Rotatable components offer many possibilities for producing a defined imbalance.

[0009] Firstly, by radially staggering the central longitudinal axis, the wall thickness or radial thickness of the wall can be designed to increase and decrease along the circumference. This makes it possible to provide areas with small wall thickness and areas with large wall thickness. The wall thickness change can be continuous.

[0010] Secondly, the wall thickness or radial thickness of the wall can be designed to be thinner and / or thicker in the circumferential direction partially or locally by means of the at least one wall notch and / or at least one wall thickening. It is also possible to provide regions with small wall thickness and regions with large wall thickness. The wall notch and / or the wall thickening can be point-shaped, extending parallel to one of the central longitudinal axes or in the circumferential direction. The wall thickening can be designed to be of uniform material or integral with the wall. Preferably, the wall thickening and / or the wall notch are designed as a sector of a circle in terms of cross section. This improves the shape stability caused by, for example, an improved material flow during spinning.

[0011] Thirdly, a region with a further pronounced small wall thickness and a region with a further pronounced large wall thickness can be provided by a radial offset of the central longitudinal axis in combination with at least one wall recess and / or at least one wall thickening.

[0012] The component according to the invention has the advantage that it has an imbalance in the wall as such and thus dispenses with the previously required but disadvantageous method steps of aligning and fixing a separate component that causes the imbalance. As a result, the rotatable component can be formed as a separate component quickly, inexpensively and without additional counterweights. The component according to the invention also has the advantage that it takes up less structural space than a component with a separate counterweight and the same imbalance effect, since the additional counterweight can be omitted.

[0013] The plane of revolution should be understood in a mathematical sense. A radial offset of the axes leads to parallel axes.

[0014] According to a conceivable improvement scheme of the rotatable component, it can be manufactured in one piece or by a single component or material section, such as a metal sheet. Therefore, additional processes for connecting with other components can be avoided. It is conceivable that the rotatable component can be composed of a metal sheet. Metal sheets are especially cheap compared to castings and can be formed in a variety of ways, such as by deep drawing, stamping, spinning, turning or milling. The metal sheet can also be a metal sheet preform. Therefore, the rotatable component can be a deep drawn part, a stamped part, a spinning part, a turned part, a milled part or a combination thereof. The inner rotating surface or inner peripheral surface and the outer rotating surface or outer peripheral surface can extend in parallel with respect to the longitudinal section, where it may be suitable for an overall extension in the circumferential direction.

[0015] According to a conceivable improvement of the rotatable component, the outer rotating surface or outer peripheral surface can be free of openings and / or wall cutouts and / or wall thickenings. The at least one wall cutout and / or at least one wall thickening can be formed on the inner peripheral surface of the wall. This is advantageous precisely in the application range of torsional vibration dampers. The elastomer surface surrounding the hub sleeve as a rotatable component on the outer peripheral side and resting there can then be designed with a uniform thickness in the circumferential direction. It is also advantageous that the orientation of the rotatable component relative to another component is independent of the design of the outer rotating surface or outer peripheral surface.

[0016] According to a further development of the rotatable component, the axis of rotation about which the component can rotate can coincide coaxially with the central longitudinal axis of the outer rotational surface or outer peripheral surface. The outer rotational surface or outer peripheral surface thus extends "round". If the axis of rotation coincides coaxially with the central longitudinal axis of the inner rotational surface or inner peripheral surface, the component will deflect to all sides during rotation.

[0017] According to a conceivable development of the rotatable component, the wall can be a hollow cylindrical part, a hollow conical part and / or a hollow truncated cone part. Thus, the wall can delimit a cavity on the circumferential side, which cavity is free of the unbalanced hub (Unwuchtnabe) or the counterweights usually provided there, as determined by the invention.

[0018] According to an improved solution of the rotatable component, the thickened wall portion of the wall can be arranged opposite to the thinned wall portion of the wall with respect to the central longitudinal axis of the outer rotational surface or the outer peripheral surface. In this way, an unbalance effect with doubled strength can be achieved. Not only the thinned wall portion contributes to the unbalance, but also the opposite thickened wall portion.

[0019] According to a conceivable development of the rotatable component, it can be designed in a cylindrical shape, wherein it can have at least one notch or a combination of notches in the region of its connecting flange. The notch or the combination of notches is preferably arranged in the region of the thinned wall and / or in the region of at least one wall notch, preferably on a straight line between the thinned wall and / or at least one wall notch and one of the central longitudinal axes. The notch can be an unbalanced notch and / or an orientation notch. The notch removes material from the component and thus serves to intensify the unbalanced effect.

[0020] According to a conceivable development of the rotatable component, it can be a hub preferably used for a torsional vibration damper for vibration damping. However, it can also be, for example, a flywheel ring or a pulley. This component is particularly suitable for balancing a system by means of an inherently introduced imbalance.

[0021] According to a conceivable improvement of the rotatable component, the thinning of the wall in the thinned wall region can be in the range of 5% to 15%, preferably between 9% and 11%, with respect to the non-thinned wall and the non-thickened wall. The same can additionally or alternatively apply to the thickened wall.

[0022] A torsional vibration damper for damping vibrations is conceivable, comprising a hub sleeve according to the present invention, a flywheel disc arranged on its circumference and which may have a belt running surface on its outer circumference, wherein the flywheel disc is connected to the hub sleeve by a rubber layer or an elastomer layer which can be moved, pressed or vulcanized onto the outer circumference of the hub sleeve so as to torsionally elastically bond the flywheel disc and the hub sleeve. The torsional vibration damper may be without a counterweight as a component separate from the hub sleeve.

[0023] According to the present invention, a tool for a spinning machine (Drückwalzmaschine) is also proposed, which includes at least one chuck having a circumferential surface, which is defined by a rotational surface, and the rotational surface is penetrated by a central longitudinal axis in the longitudinal direction, wherein a rotatable component can be formed integrally on the circumferential surface, wherein the chuck is penetrated by the rotational axis and is designed to be rotatable around the rotational axis, and wherein the central longitudinal axis and the rotational axis are offset by a distance in the radial direction.

[0024] The tool is used in particular for spinning metal sheets to produce spun parts with an overall imbalance. With the aid of the tool, a rotatable component can be produced in a simple manner, whose central longitudinal axes are spaced apart from one another. For rotatable components, spinning is a method that is inherently required during their production. The trick of the invention is also to introduce an unbalanced structure during spinning. This can be done in a simple manner in that the axis of rotation and the central longitudinal axis are radially offset relative to each other. As a result, an outer rotating surface or outer peripheral surface with a central longitudinal axis and an inner rotating surface or inner peripheral surface with a central longitudinal axis can be formed integrally with at least one spun body, wherein these central longitudinal axes are radially offset from one another.

[0025] The advantages already described above with respect to the component also apply similarly to the tool, to which reference is made here. With the aid of the tool according to the present invention, the component according to the present invention can be produced.

[0026] According to an improved embodiment of the tool, it can include another chuck, whose circumferential surface is defined by a rotational surface passed through by a central longitudinal axis in the longitudinal direction, wherein a rotatable component can be formed integrally at the circumferential surface, wherein the chuck is passed through by the rotational axis and is designed to be rotatable around the rotational axis, wherein two chucks are arranged adjacent to each other in the longitudinal direction and form a clamping space for the preform between them, wherein these rotational surfaces are preferably aligned with each other.

[0027] Between the two chucks, a metal sheet can protrude on the circumferential side, which can be split on the outer circumferential side, wherein the two wings resulting from the splitting are placed on the chuck circumference and form the wall. Advantageously, the two circumferential surfaces of the chucks are oriented coaxially with respect to one another, and they are preferably aligned with one another. It is conceivable that only one of the two wings is formed by means of a thinned wall and / or a thickened wall and / or at least one wall notch and / or at least one wall thickening. Preferably, the two wings are identically formed with respect to the thinned wall and / or the thickened wall and / or the at least one wall notch and / or the at least one wall thickening.

[0028] According to the present invention, another tool for a spinning machine is also proposed, which includes at least one chuck having a circumferential surface, which is penetrated by a central longitudinal axis in the longitudinal direction, wherein a rotatable component can be formed integrally on the circumferential surface, wherein the chuck is penetrated by the rotation axis and is designed to be rotatable around the rotation axis, wherein the cross-section of the circumferential surface is non-rotationally symmetrical.

[0029] The tool is also used in particular for spinning sheet metal to produce a spun part with an overall imbalance, that is, the outer surface of rotation or the outer circumference of the spun body is formed perfectly rotationally symmetrically about the axis of rotation, and the inner circumference has a cross-sectional profile that is not rotationally symmetrical and is therefore unbalanced.

[0030] The advantages already described above with respect to the component also apply analogously to the tool, to which reference is made here. With the aid of the tool according to the present invention, the component according to the present invention can be produced.

[0031] According to a conceivable improvement of the tool, the cross section can be oval or tear-shaped. Additionally or alternatively, it is conceivable that the central longitudinal axis of the chuck circumference and the axis of rotation coincide coaxially or are offset in the radial direction by a distance.

[0032] According to a conceivable improvement of the tool, the peripheral surface of the chuck can include local projections and / or recesses. These are used to form wall indentations and / or wall thickenings during spinning.

[0033] According to the present invention, a method for manufacturing a rotatable component is also provided, comprising at least the following steps:

[0034] a) provide tools according to this document,

[0035] b) placing the metal sheet or the metal sheet preform on the tool,

[0036] c) Rolling by means of at least one spinning body which is movable in radial and / or axial direction relative to the axis of rotation in order to spin the metal sheet or preform onto the circumference of at least one chuck in order to thereby obtain a rotatable component with an imbalance.

[0037] The sheet metal preform can be deep-drawn before insertion. Additionally or alternatively, the sheet metal preform can be punched with notches before insertion, preferably with at least one directional notch. Additionally or alternatively, the rotatable component can be punched with notches after rolling, preferably with at least one unbalanced notch. However, at least one unbalanced notch can also be introduced during the first punching or before rolling. With the method of the invention, a component can be formed, which itself forms a defined unbalance. The component can achieve up to 100% of its total unbalance by the design of the wall according to the invention, the total unbalance can be indicated, for example, according to the unbalance amount = [gmm]. This can be the case, for example, when there are no directional notches and / or unbalanced notches or the notches are mutually balanced. This can be the case, for example, when two identical directional notches are provided, which are opposite to each other with respect to the axis of rotation. However, it is also conceivable that a total unbalance of up to 80%, 66%, or 50% is generated by the wall design according to the invention. It is conceivable that the remaining total unbalance is generated by notches, preferably directional notches and / or unbalanced notches.

[0038] The advantages already described above with respect to the component also apply analogously to the method, to which reference is made here. With the method according to the present invention, a component according to the present invention can be produced.

[0039] According to a conceivable development of the method, the rolling can be performed manually and / or on a motor-driven spinning machine. The production of components with an overall imbalance is not limited to machine production.

[0040] According to a development of the method, it can be provided that at least one notch is introduced, preferably punched, into the metal sheet and / or the metal sheet preform and / or the rotatable component. The at least one notch can be formed in the connecting flange. The notch can be a directional notch or an unbalanced notch. The at least one notch can be introduced before or after rolling. It is also possible to introduce at least one notch before rolling and at least one notch after rolling. Alternatively, the introduction can be carried out by means of a cutting method, preferably by means of milling.

[0041] According to a further development of the method, provision can be made for the metal sheet or the sheet metal preform to be oriented on the tool by means of at least one notch and preferably by means of an orientation element of the workpiece inserted into the notch. The orientation element can be, for example, an orientation pin which can be tapered or have a conical or semicircular end for simple oriented insertion of the metal sheet or sheet metal preform.

[0042] According to a refinement of the method, the at least one notch can be arranged opposite the thickened wall portion with respect to the axis of rotation. The notch and / or notch combination can thus be used to intensify the unbalance effect so that it is not arranged uniformly around the axis of rotation. Instead, the notch and / or the notch combination is concentrated in a limited area of ​​the component.

[0043] According to a conceivable development of the method, all spinning bodies can be at the same radial distance from the axis of rotation at the same time.

[0044] The concept according to the invention can also be described as a method, which comprises at least the following steps:

[0045] a) provide a tool or spinning chuck,

[0046] b) placing the metal sheet or the metal sheet preform on the tool,

[0047] c) rolling by means of at least one spinning body which is adjustable in radial and / or axial direction relative to the axis of rotation in order to spin the metal sheet or preform onto the circumference of the at least one tool or chuck in order to thereby obtain a component with a rotationally symmetrical wall,

[0048] d) Removing at least one material portion of the wall to form a thinned wall portion and / or at least one wall indentation.

[0049] The advantage of this method is that the material of the spinning machine is protected. Since the spinning machine does not have to be equipped with a tool or a chuck in which the above-mentioned axis misalignment occurs, in particular the machine bearings can be protected. The unbalanced design is carried out in a subsequent method step of material removal. The material removal can be carried out, for example, by means of turning and / or milling. It is conceivable that the rotatable component is clamped unbalanced for turning and / or milling. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Further features, details and advantages emerge from the wording of the claims and from the following description of exemplary embodiments in conjunction with the figures, in which:

[0051] Figure 1 shows a longitudinal section of a rotatable member with a tool according to a first embodiment,

[0052] Figure 2Shown along the basis Figure 1 The cross-sectional view of line II-II,

[0053] Figure 3 shows a longitudinal section of a rotatable member with a tool according to a first embodiment,

[0054] Figure 4 Shown along the basis Figure 3 The cross-sectional view of line IV-VI,

[0055] Figure 5 A top view of the hub is shown,

[0056] Figure 6 Shows the associated tools along the basis Figure 5 A longitudinal section of line VI-VI, and

[0057] Figure 7 Shown along the basis Figure 5 A longitudinal section view along line VI-VI.

[0058] Reference numerals list

[0059] 1 Component

[0060] 2 Spinning roller parts

[0061] 3 walls

[0062] 4 Internal rotation surface

[0063] 5 Inner Surface

[0064] 6 External rotation surface

[0065] 8 Hub

[0066] 10 First Chuck

[0067] 12 Second chuck

[0068] 14 Week 1

[0069] 16 Second week

[0070] 18 First rotation surface

[0071] 20 Second rotation surface

[0072] 22 Third chuck

[0073] 26 Thickened wall

[0074] 28 Thinning the wall

[0075] 30 Clamping space

[0076] 32 Circumference

[0077] 34 Gap

[0078] 36 Spinning Roller

[0079] 38 Directional pin

[0080] 40 Wall gap

[0081] 42 Wall thickening

[0082] 44 Connection flange

[0083] 46 penetration opening

[0084] 48 Middle

[0085] 50 Main body

[0086] 52 Column

[0087] 54 Wing

[0088] 56 Directional Gap

[0089] 57 Marginal Area

[0090] 58 Imbalance Gap

[0091] 60 Mandrel

[0092] 62 Outer Area

[0093] 64 bulge

[0094] A Rotation axis

[0095] A36 Rotation axis

[0096] C18 outer diameter

[0097] C20 outer diameter

[0098] D Distance

[0099] E6 Radial distance

[0100] E18 Radial distance

[0101] E20 Radial distance

[0102] L Vertical

[0103] Q Cross section

[0104] R Radial

[0105] X Radial Thickness

[0106] Y Radial Thickness

[0107] Z4 Center longitudinal axis

[0108] Z6 Center longitudinal axis

[0109] Z18 center longitudinal axis

[0110] Z32 Center longitudinal axis DETAILED DESCRIPTION

[0111] In the drawings, identical or mutually corresponding parts are respectively marked with the same reference numerals and are therefore not described again unless it is inappropriate. The features already described are not described again to avoid repetition and they can be applied to all parts with identical or mutually corresponding reference numerals unless explicitly excluded. The disclosure contained in all specifications can be applied to the same parts with the same reference numerals or the same component names according to the meaning. The position descriptions selected in the description, such as top, bottom, lateral, etc., also relate to the figures described immediately and shown and are applied to the new positions according to the meaning when the position changes. In addition, individual features or feature combinations from the different embodiments shown and described can also represent solutions that are independent, creative or according to the invention.

[0112] Figures 1 to 4 The basic principle of the invention is schematically illustrated with reference to a rotatable member 1 . Figures 5 to 7 A hub 8 is drawn, which is the rotatable component 1 .

[0113] Figures 1 to 4 The one-piece component 1 has a wall 3, the hollow cylindrical part of which has an inner surface of revolution 4 ( Figure 1 and Figure 2 ) or inner surface 5( Figure 3 and Figure 4 ) and the outer surface of revolution 6. The two surfaces 4, 6 are therefore also cylindrical. The two surfaces 4, 6 extend parallel to each other in the longitudinal section. The outer surface of revolution 6 is arranged on the circumference of the inner surface of revolution 4 or the inner peripheral surface 5. It can also be seen that the outer surface of revolution 6 or the outer peripheral surface has no notches or no wall notches and wall thickenings.

[0114] Figure 1 and Figure 2 It is shown that the inner rotational surface 4 is penetrated by the central longitudinal axis Z4 and the outer rotational surface 6 is penetrated by the central longitudinal axis Z6. The two central longitudinal axes Z4, Z6 extend through the component 1 in the longitudinal direction L. Between the two central longitudinal axes Z4, Z6 spaced apart in the radial direction R, a distance D is formed.

[0115] The component 1 is placed on the first chuck 10 of the spinning machine tool. The chuck 10 has a circumferential surface 14, on which an inner rotating surface 4 is formed. The circumferential surface 14 is limited by a rotating surface 18, which is passed through by the central longitudinal axis Z18 in the longitudinal direction L. Therefore, the chuck 10 has a circular cross section Q. The central longitudinal axis Z4 of the inner rotating surface 4 therefore coincides with the central longitudinal axis Z18 of the rotating surface 18 of the chuck 10. The chuck 10 is rotationally symmetrical with its central longitudinal axis Z18 as the center. However, the chuck 10 can be clamped unbalanced in the spinning machine. That is, the spinning machine rotates the chuck 10 around the rotation axis A. The spinning body or the spinning roller 36 is also aligned at the rotation axis A. It can be seen that the radial misalignment of the distance D between the axis Z18 and A and the radial misalignment of the distance D between the axis Z4 and Z6 are thus formed. Therefore, during the spinning process, the thinned wall portion 28 is formed in the following section of the wall 3, and the axis is misaligned in its direction. On the opposite side with respect to the central longitudinal axis Z6, a thickened wall portion 26 is formed, the thickened dimension of which is the thinned dimension of the thinned portion 28. It can be seen that the wall thickness changes continuously along the circumferential direction U.

[0116] about Figure 3 and Figure 4 , should only describe Figure 1 and Figure 2 Instead of the first chuck 10, the component 1 is now integrally formed on a third chuck 22 of another tool for a spinning machine. The chuck 22 has an oval cross section Q, so the chuck 22 does not have a rotational surface as a peripheral surface 32. The cross section of the peripheral surface 32 is non-rotationally symmetrical or non-rotationally symmetrical. It is shown that the central longitudinal axis Z32 of the peripheral surface 32 coincides with the rotation axis A, but they can also be radially spaced apart from each other by a distance D.

[0117] Without being limited to the embodiment, the wall notch 40 formed by the third chuck 22 on the inner circumferential surface 5 by means of corresponding matching shapes (partial protrusions and partial recesses in the circumferential surface 32) is located in the thinned wall portion 28 area, and the wall thickened portion 42 is located in the thickened wall portion 26 area. The wall notch 40 and the wall thickened portion 42 are opposite to each other with respect to the central longitudinal axis Z6.

[0118] Figures 5 to 7A hub sleeve 8 is shown as a spinning roller component 2. The hub sleeve 8 can be a component of a torsional vibration damper in a known manner and make an unbalanced hub sleeve superfluous. The hub sleeve 8 is designed to be cylindrical and comprises a wall 3 and a connecting flange 44 with a main body 50, which has a central through-opening 46. The through-opening 46 is oriented coaxially with the outer rotating surface 8 and is used to place the hub sleeve 8 on an axle. For this purpose, a fixing mechanism in the form of a hole, not shown, can also be additionally provided. An intermediate portion 48 of the connecting flange 44 is formed between the main body 50 of the connecting flange 44 and the wall 3. It is located in a plane parallel to the plane in which the main body 50 is located. The intermediate portion 48 and the main body 50 are connected by a cylindrical portion 52. The wall 3 is supported radially on the inside at half its height along the longitudinal direction L by the connecting flange 44 or its intermediate portion 48. Therefore, the two wings of the wall 3 extend from the connecting flange 44 or its intermediate portion 48 in opposite directions. This causes a small lever force.

[0119] The connecting flange 44 or its middle part 48 has a continuous notch 34, which together form a notch combination. The notch 34 is designed as an orientation notch 56 and an unbalanced notch 58 and extends in the circumferential direction U through a sector having a center on the axis A and an angular dimension of 210°. The notch combination is arranged radially centered relative to the thinnest position of the thinned wall 28 and includes two orientation notches 56 with semicircular edge areas 57 and three unbalanced notches 58 with a trapezoidal profile, wherein the long sides of the trapezoid are outward in the radial direction R to enhance the unbalanced effect. The two orientation notches 56 are completely opposite in the radial direction with respect to the axis A. The unbalanced notches 58 are arranged equidistantly between the two. The shape or profile of the unbalanced notch 58 is advantageously different from the shape or profile of the unbalanced notch 58 to avoid being mistakenly arranged on one or more orientation pins 38. The orientation pin 38 has a circular cross section here, which corresponds to the semicircular edge area 57 of the orientation notch 56.

[0120] Now based on Figure 6, one of many possible ways for manufacturing a component 1 according to the invention with inherent imbalance will be described below. The metal sheet or metal sheet segment can first be deep-drawn or otherwise correspondingly formed to form a metal sheet preform with a connecting flange 44. At least the notch 46 and at least one orientation notch 56 can then be added, for example, by means of stamping. But stamping before deep drawing is also conceivable. In order to avoid re-clamping, it is meaningful to add an unbalanced notch 58 together with at least one orientation notch 56. Then, the metal sheet or the metal sheet preform is placed on the second chuck 12. The second chuck 12 has an orientation pin 38, which is not in the cross section here, but is drawn for the sake of illustration. In addition, the second chuck 12 includes a mandrel portion 60, which is inserted into the notch 46 for centering. The first chuck 10 can then be placed, which forms the matching shape of the second chuck 12. A clamping space 30 is formed between the two chucks. The outer region 62 of the sheet metal preform, which projects outwardly in the radial direction R beyond the circumferential surface 14, 16 of the chuck 10, 12 and is indicated by the dashed line, is split, thereby forming the wings 54. The circumferential surface 16 is bounded by a rotational surface 20. The wings 54 are placed or rolled onto the circumferential surface 14, 16 of the chuck 10, 12 by means of a pressure tool or a spinning roller 36. Thus, a circumferential projection 64 is rolled out at the axial height of the center section 48.

[0121] The rotation axis A is defined by the spinning machine, which coincides with the central longitudinal axis Z6 of the outer rotating surface 6. In contrast, the central longitudinal axes Z4, Z18 and Z20 coincide with each other in the radial direction R at a distance D. Therefore, the chucks 10, 12 are rotationally symmetrical around the central longitudinal axes Z18 and Z20, but their rotational symmetry axes are separated from the rotation axis A. As a result, different wall thicknesses of the wall 3 can be formed in a single manufacturing step. The rotation axis A36 of the spinning roller 36 has the same radial distance from the rotation axis A at the same time.

[0122] For example, in Figure 6 The dimensions of the invention are described in the following. The outer diameter C18 of the rotating surfaces 18 and 20 can be 107.4 mm. The radial distance E6 of the outer rotating surface 6 from the rotating axis A can be 56 mm. The radial distance E18 of the rotating surfaces 18 and 20 from the central longitudinal axes Z4, Z18, Z20 can be 53.7 mm. Therefore, there is a radial misalignment D of 0.3 mm. Figure 6 In the drawings, the dimensions are not exactly to scale.

[0123] Figure 7 In principle, Figure 5 and Figure 6The hub sleeve is a hub sleeve of the embodiment of the present invention, but only the flange is designed to face the opposite side in the longitudinal direction L. The thickest wall thickness has a radial thickness X in the region of the thickened wall section 26. In addition, the reduced wall thickness in the region of the thinned wall section 28 has a radial thickness Y. The longitudinal sections of the two wings 54 are preferably designed to be identical. Preferably, the thicknesses X and Y are radially diametrically opposite. Thus, at least for the embodiment shown:

[0124]

[0125] The invention is not limited to the above-described embodiments, but can be varied in various ways. All features and advantages from the claims, the description and the drawings, including structural details, spatial arrangements and method steps, can be important to the invention both individually and in various combinations.

[0126] All combinations of at least two of the features disclosed in the description, the claims and / or the figures fall within the scope of the invention.

[0127] In order to avoid repetition, features disclosed in terms of the device should also be considered as disclosed and claimable in terms of the method. Likewise, features disclosed in terms of the method should also be considered as disclosed and claimable in terms of the device.

Claims

1. A rotatable component, comprising a wall (3), wherein the wall (3) has an inner rotation surface (4) or an inner peripheral surface (5) and an outer rotation surface (6) or an outer peripheral surface, wherein the inner rotation surface (4) or the inner peripheral surface (5) is penetrated by a first central longitudinal axis (Z4) in the longitudinal direction (L), and the outer rotation surface (6) or the outer peripheral surface is penetrated by a second central longitudinal axis (Z6) in the longitudinal direction (L) and is arranged on the peripheral side of the inner rotation surface (4) or the inner peripheral surface (5), characterized in that: The first and second central longitudinal axes (Z4, Z6) are offset relative to each other by a distance (D) in the radial direction (R) and / or the wall (3) has at least one wall notch (40) and / or at least one wall thickening (42), whereby the wall (3) has no rotational symmetry.

2. The rotatable member according to claim 1, characterized in that The rotation axis (A) about which the rotatable element can rotate coincides coaxially with the second central longitudinal axis (Z6) of the outer rotation surface (6) or outer peripheral surface.

3. A rotatable member according to any one of the preceding claims, characterised in that The thickened wall portion (26) of the wall (3) is located opposite the thinned wall portion (28) of the wall (3) with respect to the second central longitudinal axis (Z6) of the outer rotational surface (6) or the outer peripheral surface.

4. A tool for a spinning machine, comprising at least one first chuck (10) having a first peripheral surface (14), the peripheral surface being defined by a first rotational surface (18), the rotational surface being passed through by a third central longitudinal axis (Z18) in the longitudinal direction (L), wherein: A rotatable component can be integrally formed on the first circumferential surface (14), wherein the first chuck (10) is penetrated by a rotation axis (A) and is designed to be rotatable around the rotation axis (A), and is characterized in that the third central longitudinal axis (Z18) and the rotation axis (A) are offset by a distance (D) in the radial direction (R).

5. The tool according to claim 4, characterized in that The tool comprises another second chuck (12) having a second circumferential surface (16), wherein the second circumferential surface is defined by a second rotating surface (20) passed through by a fourth central longitudinal axis (Z20) in the longitudinal direction (L), wherein a rotatable component can be integrally formed on the second circumferential surface (16), wherein the first chuck (10) is passed through by the rotating axis (A) and is designed to be rotatable around the rotating axis (A), wherein the two chucks are arranged adjacent to each other in the longitudinal direction (L) and form a clamping space (30) for the preform therebetween.

6. The tool according to claim 5, characterized in that The first rotation plane (18) and the second rotation plane (20) are aligned with each other.

7. A tool for a spinning machine, comprising at least one chuck (22) having a peripheral surface (32) which is penetrated in the longitudinal direction (L) by a fifth central longitudinal axis (Z32), wherein: A rotatable component can be integrally formed on the peripheral surface (32), wherein the chuck (22) is penetrated by the rotation axis (A) and is designed to be rotatable around the rotation axis (A), and is characterized in that the cross-section (Q) of the peripheral surface (32) is non-rotationally symmetrical.

8. A method for manufacturing a rotatable member, the method comprising at least the following steps: a. Providing a tool according to any one of claims 4 to 6, b. placing a metal sheet or a metal sheet preform onto the tool, c. Rolling with the aid of at least one spinning body which can be adjusted radially and / or axially relative to the axis of rotation (A) for spinning the metal sheet or preform onto the circumferential surface (14, 16, 32) of the at least one chuck (10, 12, 22) to thereby obtain an unbalanced rotatable component.

9. The method according to claim 8, characterized in that At least one recess (34) is introduced into the metal sheet and / or the metal sheet preform and / or the rotatable component.

10. The method according to claim 9, characterized in that The metal sheet or the sheet metal preform is oriented on the tool as a function of the at least one recess (34).

11. The method according to claim 8, characterized in that The at least one recess (34) is located opposite the thickened wall portion (26) with respect to the rotation axis (A).

12. The method according to claim 9, characterized in that At least one notch (34) is punched into the metal sheet and / or the metal sheet preform and / or the rotatable component.

13. The method according to claim 10, characterized in that The orientation of the metal sheet or the sheet metal preform on the tool is adjusted by inserting an orientation element of the tool into the recess (34).

Images