KR20190035722A - Pressure plate unit manufacturing method, pressure plate unit, and friction clutch - Google Patents

Abstract

The present invention relates to a method for manufacturing a pressure plate unit and a pressure plate unit manufactured by the method. A method for manufacturing a pressure plate unit, comprising: providing a sheet metal blank (30); One or more rolling tools (40) are mechanically interactively connected to the sheet metal blank (30); A relative rotational movement of the rolling tool 40 relative to the sheet metal blank 30 is performed; And at the same time the rolling tool 40 is moved in a vertical direction relative to the compressive force 50 causing the rolling tool 40 to come into close contact with the sheet blank 30 while the material of the sheet blank 30 is displaced by the rolling tool 40. [ Is in close contact with the sheet blank 30 side in such a way as to flow along the direction 60 comprising at least one component of the sheet metal 30 so that an annular structure is formed on the side of the sheet blank 30 which is pressed by the rolling tool 40 Which annular structure forms the pressure plate 10 in the plane of the initial sheet metal blank extension; . Thereby, a pressure plate unit is provided which meets very different requirements, in a simple, time-saving and cost effective manner, by the method proposed here for the manufacture of pressure plate units.

Description

Pressure plate unit manufacturing method, pressure plate unit, and friction clutch

The present invention relates to a method for manufacturing a pressure plate unit and a pressure plate unit manufactured by the method. The present invention also relates to a friction clutch including a pressure plate unit according to the present invention.

In the case of all types of friction clutches, a pressure plate, which mechanically allows pressing presses to be applied to one friction pack, respectively, so that the individual members or layers of the friction pack are connected to one another in a friction- Are required. Thereby, torque can be delivered in the friction pack and in the clutch with the friction pack. In this case, a pressing force is normally applied to the pressure plate through a disc spring supported on the clutch cover. Between the disc spring and the pressure plate, in the case of some clutch configurations, a so-called cam ring, which may also be referred to as a support ring, is arranged. On the cam ring, the disc spring is seated on a substantially circular path so that the force applied by the disc spring is transmitted onto the cam ring or the support ring and from the cam ring or the support ring into or onto the pressure plate, The pressure plate can compress the friction pack. In this case, the support ring can be formed as a cam ring including the cams to cancel the rotational movement.

For a description of conventional pressure plates and cam rings or support rings, reference is made to FIGS. 1 to 4 of the accompanying drawings. 1 shows a stell pressure plate 1 forming a support ring 20 as an integral part. The support ring 20 includes gaps so that the cams of the support ring 20 are formed. The support ring 20 was fabricated through a molding process substantially corresponding to bending.

2 shows another embodiment of the pressure plate unit in which the steel pressure plate 1 and the inserted support ring 2 are shown in an exploded view. The inserted support ring 2 can be inserted into correspondingly corresponding recesses of the steel pressure plate 1 with projections to prevent relative rotational movement. In Fig. 3, a support ring 3 fixed by rivets 4 on a steel pressure plate 1 is shown. Shackles 90, also referred to as lugs, are arranged on the circumference of the steel pressure plate 1 as integral parts of the steel pressure plate 1. [ Another alternative embodiment is shown in Fig. 4, which shows a segmented steel pressure plate 5. The pressure plate is composed of individual ring segments. The supporting ring 2 to be inserted further connects all the segments which are coupled to each other. Some of the segments include shackles 90 that are provided to fix leaf springs, not shown here, using openings 91 in the shackles 90.

DE 10 2011 079 840 A1 discloses a pressure plate unit in which a unit consisting of a pressure plate and a cam ring is constituted by individual members. Wherein the cams on the support ring interact with recesses formed complementarily on the pressure plate to prevent rotational movement of the ring. However, for the realization of the pressure plate including the support ring, a certain effort must be made not only in the manufacture of the two separate members but also in the assembly of the support ring or cam ring on the pressure plate. In addition, different pressure plates and different support rings must be provided for each of the clutch structure types and sizes, so as to be able to achieve clutch parameters that are often defined under conditions of reasonable manufacturing costs.

It is an object of the present invention to provide a method for manufacturing a pressure plate unit including a pressure plate and a support ring, and a pressure plate unit itself, in which a friction clutch having a sufficient service life can be manufactured with a low manufacturing cost and consequently a suitable manufacturing cost And that they themselves can be applied in a relatively larger clutch range and the pressure plate unit.

This problem is solved by the method according to the invention for the production of the pressure plate unit according to claim 1 and the pressure plate unit according to the invention according to claim 8. Preferred embodiments of the method according to the invention for the production of pressure plate units are specified in the dependent claims 2 to 7. A preferred embodiment of the pressure plate unit according to the invention is specified in the dependent claim 9. As a supplement to the present application, a friction clutch including a pressure plate unit according to the present invention is also provided.

The features of the claims may be combined in their respective technically suitable types and manner, and the features in the drawings, including supplementary implementations of the invention, as well as the description in the following description may also be included have.

A pressure plate unit according to the present invention includes a pressure plate and a support ring. In the case of a method for manufacturing a pressure plate unit, not only a sheet metal blank is provided, but also one or more rolling tools are provided which are mechanically interacted with the sheet blank. In other words, the rolling tool is attached to the surface of the sheet blank with its rolling surface. Also, the relative rotational movement of the rolling tool relative to the sheet metal blank is also performed. This means that, in addition to the rotational movement of the rolling tool itself, the rolling tool is rotationally moved relative to the sheet metal blank, or the sheet metal blank is rotationally moved relative to the rolling tool, or both the rolling tool and the sheet metal blank are rotationally moved it means. In this case, the rolling tool comprises at least one component which advances in a direction perpendicular to the compression force which causes the rolling tool to come into contact with the surface of the sheet blank, while the material of the sheet blank is displaced by the rolling tool, Is brought into close contact with the sheet blank side in such a manner as to flow along the direction including the total flow movement due to it. As a result, an annular structure is formed on the surface of the sheet blank to be pressed by the rolling tool. The annular structure forms a compression ring. As a result, a pressure plate is formed on the plane of the initial sheet metal blank extension. This means that on the sheet metal blank, the longitudinal axis or rotation axis of the annular structure, also referred to as the compression ring, extends vertically from the sheet blank, while the material remaining in the plane of the initial sheet metal blank forms the pressure plate. Accordingly, the pressure plate and the compression ring are integral parts in the form of a pressure plate unit manufactured by so-called roller spinning or flow forming. In this case, the sheet blank to be used is preferably a cut blank, which can also be referred to as a circular blank. Preferably, the rolling tool is brought into close contact with the sheet blank at a high pressure, but at a relatively low temperature below the recrystallization temperature of the material of the sheet blank, so that a high-temperature work hardening of the pressure plate unit is performed. Accordingly, the support ring or the cam ring formed on the pressure plate in accordance with the present invention is connected to the pressure plate in a rotation-fixed manner. In this case, the described method is not limited only to the mentioned order of steps of creation of the mechanical interaction link and realization of the relative rotational movement, but the sequence may be performed in the reverse order. In this case, preferably, a plurality of rolling tools distributed on the periphery of the sheet blank are used, such as, for example, two or three rolling tools. When a rolling tool having a corresponding angular outer contour is used, the rolling tool acts on the material of the sheet blank, such as a wedge, and thus the areas of the material of the sheet blank are spaced apart from one another, Roller spinning can be carried out in such a manner that the cutting or separating process is almost combined with the rolling process.

An advantage of the method according to the invention lies in the production of a pressure plate comprising a support ring, in particular without carrying out additional bonding methods. In this case, the height and / or width of the support ring can be variably formed. By the method of the present application, pressure plate units of very different sizes can be manufactured for very different applications, and accordingly for different clutch sizes and types.

Preferably, the method according to the invention for the manufacture of a pressure plate unit is carried out in such a way that the rolling tool is attached to the rim of the sheet blank and then moved towards the rotational axis of the relative rotational movement in the radial direction. Alternatively, the rolling tool is mounted on the surface of the sheet blank and is then moved toward the rotational axis of the relative rotational movement in the radial direction. Thus, when the sheet blank is annular, the sheet blank is moved in the direction of the opposing rim, that is to say the rolling tool is moved from the outer rim in the direction of the inner rim, or vice versa from the inner rim to the direction of the outer rim . When the sheet metal blank is plate-shaped, the rolling tool is preferably attached to the outer rim and moved in the direction of the rotation axis. Accordingly, in an alternative embodiment of the present method in which the rolling tool is attached on the surface of the sheet blank and then moved toward the rotational axis of the relative rotational movement in the radial direction, the rolling tool is not attached to the rim of the sheet blank , Is attached to the surface of the sheet blank spaced from the rim, and the direction of movement extends in the direction of the rim or rotational axis. Thus, in the case of this embodiment, the rolling tool is locked into the material of the sheet blank. As a result, there is an advantage that the surface to be machined and the volume of the support ring are also variable. When the shackles, also referred to as lugs and used for securing the leaf springs, are required, the shackles can be machined in a pressure plate manufactured before or after roller spinning, or through a sheet blank or through this sheet blank.

For the purpose of forming a defined shape or contour of the support ring, a back-pressure element, preferably in the form of an arbor, is particularly suitable for restricting the flow of the sheet blank material during roller spinning, And is used for contouring the material forming the support ring on the side facing the back pressure member.

In yet another embodiment of the method, the sheet blank is formed by a punching process in which shacks or lugs are formed for mechanical engagement of the leaf springs, in such a manner that they protrude substantially from the outer limiting edge of the sheet blank on the sheet blank . The leaf springs are used for the torsional rigid connection of the pressure plate and the clutch cover and for the release of the pressure plate from the friction pack for the purpose of interrupting the torque transmission realized by the clutch. The manufactured shackles or lugs can later be bent from the plane of the sheet metal blank to prevent collision with the rolling tool. Such a bending process may optionally be carried out with a drilling process, or may be carried out through the drilling process. In an alternative embodiment, the manufactured shackles are then curved through a predominantly compressive force during roller spinning. If excess material must be present in the area of the shackles through the perforation and / or bending process, the material may be separated and removed again at a later time.

Thereby, a pressure plate unit is provided in which the sheet metal blank is preferably perforated from the raw material. In this drilling process, the sheet blanks that substantially form the pressure plate as well as the shackles for plate spring engagement present on the sheet blank are made with the intended geometry. Accordingly, in addition to the pressure plate, a simple and time-saving manufacturing of the entire pressure plate unit including the pressure plate as well as the support ring is possible with the plate spring coupling.

In an alternative embodiment of the method of the present invention, after execution of the rolling process, the shackles are produced by at least one separation process on the outer limiting edge of the pressure plate. The separating process may be a perforating process to process the pressure plate produced in the sheet blank, and the sheet blank is perforated so that the shackles remain on the periphery thereof on its peripheral region. The fact that the shackles are formed or punched after the roller spinning for the production of the support ring results in a difference in volume of the support ring in which the material of the shackles is involved in the roller spinning process and thereby appears as an unintentional dimensional deviation .

For complete assembly of the manufactured pressure plate unit, the plate springs can be fixed on the pressure plate by rivets after the execution of the rolling process. In one embodiment of the method, the leaf springs are directly riveted on the pressure plate. To this end, after the execution of the roller spinning for the production of the support ring, holes or openings are provided in the intended positions in the pressure plate. Corresponding to the positions of the force application into the pressure plate, the leaf springs must be configured to prevent unacceptable load loading of these leaf springs or of the structural members mechanically engaged with these leaf springs.

In an alternative embodiment, at least one angle element and preferably a plurality of angle members are mechanically fixed on the support ring. Then, leaf springs are connected to the angle member or the angle members. This means that in this embodiment of the method according to the invention the leaf springs are not fixed on the shackles or on the pressure plate but are fixed on the angle members mechanically connected to the support ring.

Accordingly, a method is provided in which the support ring is manufactured in a blank, in short a sheet metal blank, via a roller spinning process. In this case, preferably, a plurality of rolling tools start from the rim of the sheet blank and adhere the sheet blank material in such a manner that the material of the sheet blank starts to flow in the working area. The material displaced through rolling is restricted through the arbor in its flow process and thus is raised on the arbor so that an annular structure is formed in which its axis of rotation extends substantially perpendicular to the plane of the sheet blank . In this case, the piled up material corresponds to a continuous cam, and therefore the support ring made in accordance with the present invention may also be referred to as a cam ring.

Further, in order to solve the above-described problem, in a pressure plate unit manufactured by the method according to the present invention for a friction clutch of an automotive powertrain, the pressure plate of the pressure plate and the supporting ring are also made of steel. A pressure plate unit is provided. In this case, the pressure plate unit according to the present invention comprises: leaf springs which are fixed, for example, on rivets on the pressure plate or on the shackles disposed on the pressure plate; And / or angle members for positioning and fixing leaf springs. Pressure plate units made of this type are very cost effective parts that can be used in a number of clutch sizes and types.

In one embodiment of the pressure plate unit of the present application, the pressure plate unit has a substantially polygonal shape, preferably a triangular shape, with openings or holes, especially bores, disposed in the edge regions of the pressure plate, Can be fixed or fixed. The difference from the polygonal shape may be in particular that the edge areas are rounded. The aforementioned shackles or lugs are already formed in the form of polygons through the edge regions. Starting from the polygonal sheet metal blank, the support ring is formed by roller spinning. When the annular structure is relatively densely extended on the straight side edge portions, the rolling tools are in contact with the material of the sheet blank at all times during the roller spinning, relative rotation between the rolling tool and the sheet blank, . As a result, the volumetric difference, which is formed in some cases in the manufactured support ring and which is represented by deviations in relation to the height or width of the annular structure, is then to be invalidated, if necessary, through further processing steps such as separation processes.

A friction clutch for an automotive powertrain, comprising: a friction plate having a pressure plate unit according to the present invention for releasably connecting a load unit and an output shaft, A friction clutch is provided that includes a pack.

Further, preferably, the friction clutch according to the present invention also includes a clutch cover which rotates together. The friction clutch is configured to transmit torque from the output shaft to the load device and vice versa.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing invention is described in detail below with reference to the corresponding drawings, in which preferred embodiments are shown in the relevant technical background. The present invention is not to be limited in any way by the pure schematic drawings, but it should be noted that the embodiments shown in the drawings are not limited to the dimensions shown.

1 is a view showing a conventional steel material pressure plate unit including a curved support ring.
2 is a view showing a conventional steel material pressure plate unit including a support ring to be inserted.
3 is a view showing a conventional steel material pressure plate unit including a support ring to be riveted.
4 is a view showing a conventional steel material pressure plate unit including a segmented pressure plate.
5 is a view showing a roller spinning process according to the present invention.
6 is a view showing a pressure plate unit having a triangular shape.
7 is a view showing the sheet blank in the first embodiment.
8 is a view showing the pressure plate unit of the first embodiment manufactured according to the present invention.
Fig. 9 is a cross-sectional view of the pressure plate unit shown in Fig. 8 cut along the cutting line BB. Fig.
10 is a view showing a pressure plate unit of a second embodiment manufactured according to the present invention.
11 is a cross-sectional view of the pressure plate unit shown in Fig. 10 cut along the cutting line CC.
12 is a view showing the sheet metal blank of the third embodiment.
13 is a view showing a pressure plate unit of a third embodiment manufactured according to the present invention.
14 is a cross-sectional view of the pressure plate unit shown in Fig. 13 cut along the cutting line BB.
15 is a schematic view showing a roller spinning process.
16 is a view showing a roller spinning process in which a cutting process is simultaneously performed.
17 is a view showing a roller spinning process using a first rolling tool geometry.
18 is a view showing a roller spinning process using a second rolling tool geometry.

1 to 4 have already been discussed in the introduction section of the specification for the purpose of explanation of the prior art.

Fig. 5 shows a simplified schematic view of the process of roller spinning for manufacturing a pressure plate unit according to the present invention. Herein, FIG. 5a) shows the initial state of the sheet metal blank 30, which may also be referred to as a circular blank. 5B), it is possible to see the same sheet blank 30 in the state of roller spinning. In this case, the material 34 displaced by a rolling roll, not shown here, can be rounded or convex at its projecting end, as shown in Fig. 5b), and the cross- So that the support ring 20 is formed. Accordingly, the volume of the support ring 20, which is limited in diameter, as well as through the height 21 and width 22, corresponds to the volume of material 34 that is substantially displaced. This was accomplished through the action of the unillustrated rolling tool previously attached to the outer rim 31 of the sheet blank 30 and through the relative rotational movement between the rolling tool and the sheet blank 30. For maintaining the illustrated rectangular cross-sectional shape of the support ring 20, it is preferably provided with an abutment, also referred to as an arbor, which prevents further flow movement of the displaced material and thus ensures a neat contour of the side of the support ring 20. [ The back pressure member 70 illustrated in Fig. 5 is applied.

A specific embodiment of the pressure plate unit according to the present invention is shown in Fig. It can be seen here that the sheet blank 30, which also substantially comprises the pressure plate 10, has a substantially triangular shape formed through three longitudinal edge portions 11 connected to one another through edge regions. Openings 91 for fixing the leaf springs are disposed in the rounded corner areas 12, also referred to as shackles 90 or so-called lugs. Accordingly, during the roller spinning process for the production of the pressure plate unit shown in Fig. 6, the rotating rolling tool deforms less the material of the sheet blank 30 in the region of the longitudinal edge portions 11 than in the edge regions . Accordingly, in the individual ring segments of the support ring 20, different volumes may be formed, which may manifest themselves in particular at different heights of the segments. Dimensional deviations of this type can be eliminated through further processing, especially through separation processes.

In Fig. 7, a simple sheet blank is shown in the form of a circular ring for the production of the pressure plate unit. Figure 8 shows a sheet blank in which the support ring 20 has been produced through roller spinning at the surface 33 of the sheet metal blank.

In Fig. 9, the pressure plate unit manufactured is shown as a sectional view along the cutting line B-B in Fig. It can be seen here that the produced pressure plate 10 has a thinner thickness 35 in the region of its outer rim 31 than in the region of the inner rim 32. [ This results in a displacement of the material from its outer edge zone in order to form the support ring 20 in the displaced material 34 in the manner already described with reference to Figure 5, ). ≪ / RTI > 10 and 11 show an alternative embodiment in which a deformation of the sheet metal blank 30 likewise starts from the outer rim 31. Fig. In the case of the present embodiment, in the region of the inner rim 32, openings 91 used for mechanical connection of the leaf springs are formed.

12, 13 and 14, an alternative embodiment of the pressure plate unit according to the present invention is shown. Here, in Fig. 12, a sheet blank 30 is shown as a starting material for a roller spinning process. It is to be appreciated that the sheet blank 30 here comprises shackles 90 or lugs already disposed on its periphery with openings or bores 91 used for connection of leaf springs have. After the roller spinning process, the annular structure shown in Figs. 13 and 14 is formed, that is to say the support ring 20 is now formed on the surface 33 of the sheet blank 30.

However, as can be seen in Figure 14, in the case of this embodiment, the material of the sheet blank 30 was not roller-spinned at its outer rim 31 but the material was roller-spinned at the area of the inner rim 32 , Whereby the support ring (20) is constructed starting from the inner rim (32). An advantage of the present method embodiment is that the volume fluctuation through the roller spinning process does not occur in the regions of the support ring 20 by the shackles 90 disposed on the outer periphery.

In Fig. 15, the roller spinning process can be seen schematically. Here it is shown how the rolling tool 40 in the form of a rolling roll rotating about its rolling tool rotational axis 41 can engage the material of the sheet blank 30 at the outer edge 31 of the sheet metal blank . Through the incremental transfer of the rolling tool 40 along the illustrated transport direction 42, i. E., Radially inward relative to the axis of rotation 80 of the sheet metal blank 30, and onto the sheet blank 30 The compressive force 50 is applied to the material of the sheet blank 30, that is, the compressive force is such that the material is "flowing" so that, along the conveying direction 42 The material of the sheet blank 30 is raised at the rear of the rolling tool 40 to form the support ring 20 therein. To ensure accurate contouring of the support ring 20, the support ring is supported via a back pressure member 70 which is in the form of an arbor relative to the rolling tool. The back pressure member 70 interferes with the "flow" of the material of the sheet blank 30 along the direction of flow 60 of the material corresponding to the transport direction 42 of the rolling tool 40. Accordingly, in Fig. 15, the shape of the support ring 20 produced through roller spinning is not limited to the shape shown in Fig. 5B including the concave end region, but an end region having an angled cross- Can be seen.

16 to 18 show roller spinning processes executed by rolling tools of different geometries.

Here, FIG. 16 shows a roller spinning method in which the rolling step is combined with the cutting step. This is possible through a specific form of the rolling tool 40 which is formed at a substantially acute angle at its periphery. Inside the sheet blank 30, the already described flow of material is achieved through the indentation of the rotating rolling tool 40, which is based on an acute angle on the periphery of the rolling tool 14, A separation process is performed in the material. At this time, in the manner and manner described, the material 34 is displaced and can form the support ring 20 during further transfer of the rolling tool 40.

17 and 18, again, rolling tools 40 of different geometries are used, respectively. Here, the rolling tool illustrated in FIG. 18 has a substantially cylindrical shape, and in FIG. 17, the shape of the rolling tool 14 shown in FIG. 17 includes an angular extension of the outer surface with respect to the base surface or the cover surface, It is noted that the angle portion is formed on the outline, but this angle portion is not formed as sharp as the angle portion of the rolling tool 40 shown in Fig. By the rolling tool 14 shown in Figure 17, the material 34 of the sheet blank 30 can be displaced in a reliable manner and can be slightly raised relative to the plane of the sheet blank 30. After the tool change, the rolling tool 40 according to FIG. 18 is applied to the sheet blank 30 to form a right-angled extension of the support ring 20 to be manufactured. The method for manufacturing the substantially vertically protruding support ring 20, although illustrated in the entirety of the illustrated tool replacement, requires only one rolling tool 40 Can be implemented with a shorter overall manufacturing time and more efficiently than with the case of using only a single die.

Accordingly, a method according to the present invention provides a pressure plate unit that meets very different requirements, in a simple, time-saving and cost effective manner. In this case, the method is not limited to the specified pressure plate unit sizes or types, but pressure plate units of very different sizes for very different applications can be manufactured.

1: steel pressure plate
2: Support ring to be inserted
3: Support ring to be riveted
4: Rivet
5: Segmented steel pressure plate
10: Pressure plate
11: longitudinal edge portion
12: corner area
20: Support ring
21: Height
22: Width
30: sheet metal blank
31: Outer border
32: inner border
33: Surface of sheet metal blank
34: displaced material
35: Thickness
40: Rolling tool
41: Rolling tool rotating shaft
42: Feed direction
50: Compressive force
60: flow direction of the material
70: Back pressure member
80:
90: Shackle
91: opening

Claims (10)

A method of manufacturing a pressure plate unit for a friction clutch of an automotive powertrain, comprising a pressure plate (10) and a support ring (20)
A sheet metal blank 30 is provided;
- one or more rolling tools (40) are mechanically interactively connected to the sheet metal blank (30);
The relative rotational movement of the rolling tool 40 relative to the sheet metal blank 30 is carried out;
At the same time the rolling tool 40 is positioned so that the material of the sheet blank 30 is displaced by the rolling tool 40 so that it is perpendicular to the compressive force 50 causing the rolling tool 40 to come into close contact with the sheet blank 30 side Is in close contact with the sheet blank 30 side in such a way as to flow along the direction 60 comprising at least one component of the sheet metal 30 so that an annular structure is formed on the side of the sheet blank 30 which is pressed by the rolling tool 40 The annular structure forming the pressure plate 10 in the plane of the initial sheet metal blank extensions; A method of manufacturing a pressure plate unit. The method of claim 1, wherein the rolling tool (40) is attached to the rim (31, 32) of the sheet blank (30) and then is moved toward the rotational axis (80) of the radial relative rotational movement; Or the rolling tool 40 is attached onto the surface 33 of the sheet blank 30 and is then moved toward the rotational axis 80 of the relative rotational movement in the radial direction. A back pressure member (70) according to any one of the preceding claims, wherein a back pressure member (70), in particular in the form of an arbor, is provided for restricting flow movement of the sheet blank material and, Wherein the pressure plate is used for contouring the forming material. A sheet blank according to any one of claims 1 to 3, wherein the sheet blank (30) is arranged on the sheet blank (30) in such a manner as to protrude substantially from the outer edge (31) of the sheet blank Wherein the shackles (90) are manufactured by a punching process in which the shackles (90) are manufactured. The pressure plate according to any one of claims 1 to 3, wherein after the rolling process is performed, the shackles (90) are produced by at least one separation process on the outer rim (31) of the pressure plate (10) Gt; 6. A pressure plate unit manufacturing method according to any one of claims 1 to 5, wherein the plate springs are riveted on the pressure plate (10) after execution of the rolling process. 7. A method according to any one of claims 1 to 6, wherein at least one angle member is mechanically fixed on the support ring (20), and leaf springs are connected on the angle member. A pressure plate unit for a friction clutch of an automotive powertrain, which is manufactured by a method for manufacturing a pressure plate unit according to any one of claims 1 to 7,
Wherein the pressure plate (10) and the support ring (20) are made of a steel material. The pressure plate according to claim 8, wherein the pressure plate (10) has a substantially polygonal shape, preferably a triangular shape, and the edge regions (12) of the pressure plate (10) (91), in particular bores, are arranged in the pressure plate unit for a friction clutch of a vehicle power train. A friction clutch for a motor vehicle powertrain for removably connecting a load device and an output shaft, comprising a friction pack with at least one pressure plate unit according to the invention according to claim 8 or 9 for pressurizing a friction pack. .

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