CN104340916A

CN104340916A - Friction lining for electromagnetically-opened spring pressure brake for elevators

Info

Publication number: CN104340916A
Application number: CN201310330141.5A
Authority: CN
Inventors: J·胡贝尔
Original assignee: Chr Mayr GmbH and Co KG
Current assignee: Chr Mayr GmbH and Co KG
Priority date: 2013-08-01
Filing date: 2013-08-01
Publication date: 2015-02-11
Anticipated expiration: 2033-08-01
Also published as: CN104340916B

Abstract

The invention relates to a friction lining for an electromagnetically-opened spring pressure brake for elevators. The friction lining is composed of two layers in a direction parallel to its axis; the layers different in hardness are connected by locking of their materials; to be specific, the friction lining comprises a low-hardness friction lining layer facing a friction lining carrier and a high-hardness friction lining layer facing a matching friction face. In order to reduce braking thermal load of the friction lining and accordingly to achieve distortion and abrasion value as small as possible with respect to matching friction faces of metal and ceramic, the friction lining is provided; the area of the low-hardness friction lining layer and/or the area of the high-hardness friction lining layer is provided with a plurality of gaps or slits; the gaps or slits extend from inside of the friction lining to its outside, are peripherally distributed and extend in the radial direction; the gaps or slits completely or partially extend through the depth of the friction lining of the two layers.

Description

For the ferrodo of the spring pressure drg opened in an electromagnetic manner of elevator

Technical field

The present invention relates to a kind of Novel friction liner for being applied in the so-called maintenance drg of elevator.

Background technology

Modern lift facility is equipped with adjustable actuating device usually, and all motion features that described actuating device realizes described equipment by means of only drive motor under normal operation comprise acceleration and braking procedure.At this, the maintenance function that existing drg is pure only bear gondola quiescence in normal operation under, and do not do work due to friction at this.Only power failure, there is uncontrolled motion or accidental movement time in emergency circumstances, described drg also must can implement the dynamic brake of elevator, wherein, must all kinergeties of control system.

In the process of technical development, in elevator, present the trend that whole system tends to (driver element comprises drg) compact design size more, and require that braking torque increases simultaneously.

In principle, high static braking torque under brake structural size diminishes situation can realize only by high operating effort and realize the high surface pressure that causes thus on the contact surface between ferrodo and pairing friction face, and this technically can by being realized by the combination of resin-based hard friction liner and metal or pottery pairing friction face.

The shortcoming applying resin-based described hard friction liner is that its elasticity and deformability are all inadequate.In the braking procedure with high work due to friction, it can cause surface temperature import and therefore cause rotor to be distorted in the brake rotors being equipped with ferrodo, and described distortion does not compensate by the inadequate elasticity of hard friction liner.In addition, the friction face that matches in most of the cases has by manufacturing the form variations caused.Distortion is additional to this form variations, and described distortion imports due to the surface temperature in braking procedure and appears at pairing friction face inside (friction face heat, dorsal part is cold) at this thermal drop produced.This form variations in pairing friction face region and distortion also can not may be compensated based on its elasticity due to hard friction liner not.

Due to the described form variations in rotor and pairing friction face region and distortion, finally cause local surface pressure too high and its result causes the temperature spikes of local, and the height wearing and tearing causing making ferrodo to reduce service life.

Therefore, for improving service life and functional key factor of particularly ferrodo in the maintenance drg of elevator be, between ferrodo and pairing friction face uniformly and the surface pressure remained unchanged that is first in operation, this avoids the local temperature peaks on ferrodo simultaneously, and the result of this local temperature peaks is the distortion caused by temperature not wishing to occur of pairing friction face and ferrodo or that is brake rotors distortion caused by temperature not wishing to occur on the whole of ferrodo carrier.

By prior art known case as the friction element for drg in rail vehicle, as it is disclosed in DE 20 2,011 001 991 U1.Describe in this case, the brake lining carrier for plate disc brake is flexibly fixed with multiple independent friction element by tensioning spring.Utilize and thisly arrange that what pursue is following target, that is, make single friction element with well-distributed surface pressure as far as possible with match friction face (being brake disc) here and contact.

The shortcoming of the prior art this described above of DE 20 2,011 001 991 U1 is, technology for realizing desired effects expends very high and described being arranged in the spring pressure drg of electromagnetism and lacks the adaptability of technology, this is because the spring pressure drg of electromagnetism must carry out work with the low-down operative strokes of friction element, because the magnetic force otherwise for making drg ventilate may be inadequate, particularly when strong pressure spring being used for realize high confining force/lock torque.

In DE 28 53 802 A1 of this application people, describe a kind of spring pressure drg that can ventilate in an electromagnetic manner, it does not have noise as far as possible in pull-up or whereabouts and when braking, and can not therefore require high structure consumes simultaneously.For this purpose, teach in this in advance open source literature and other documents, on plate-like ferrodo carrier (that is brake rotors) both sides, sulfuration has the rubber layer of at least 1 millimeters thick, it is fixed with ferrodo respectively, thus result is provided with double-deck brake lining structure, the last reason based on reducing noise more precisely.

Each layer is separately there is in DE 28 53 802 A1, i.e. each layer separately of ferrodo carrier, elastomer layer and ferrodo form, they must be connected to each other by bonding or vulcanization process, wherein, the connection particularly between elastomer layer from ferrodo is problematic technically due to its different chemical nature and is therefore expensive.During wipe contact between ferrodo and pairing friction face in surface pressure fluctuation, DE 28 53 802 A1 relative at that time prior art has proposed a kind of improvement project, but this is not the object of DE 28 53 802 A1 and this little layer thickness of about 1 millimeter due to elastomer layer is not best from the viewpoint of today.In addition, elastomer layer described in DE 28 53 802 A1 has significantly different temperature expansion coefficienies compared with organic ferrodo applied there, therefore between elastomer layer from ferrodo, causes different het expansions when temperature change and causes the thermal stress improved and the distortion caused by heat as a result.

In addition, the thermal expansion coefficient of ferrodo itself be different from most cases metal or the thermal expansion coefficient of ferrodo carrier be made up of fiber composite materials.Heat in ferrodo that is one-sided in the thermal expansion coefficient different by these and braking procedure, that keep in touch to the pairing friction face with preferably metal or pottery imports, make the ferrodo be connected with ferrodo carrier by elastomer layer that hot distortion occur or described ferrodo itself is out of shape, and also cause whole rotor and pairing friction face generation thermal deformation, it is not compensated completely by the elasticity of elastomer layer.At this, ferrodo itself and articulamentum bear high load capacity and cause local surface pressure too high.The wearing and tearing of ferrodo may be increased again thus.

A kind of individual layer annular ferrodo is described in JP5-296269 disclosed in 9 days November in 1993, its end face/friction face is provided with the radial gap extended, described gap passes on the inside or exterior periphery of annular friction liner, to realize thus: under the condition that air gap available in drg is narrow, cause available lock torque that fluctuation occurs and the Powdered abrasive particle of drg generation Fast Wearing also can be removed without any problems from drg.

Summary of the invention

Therefore, the object of the invention is to, improve a kind of ferrodo of the spring pressure drg opened in an electromagnetic manner for elevator in the following way, namely, described ferrodo is expended with lowest possible technology manufactured in process failure-free mode, still often kind of local overheating (as in service braking) is avoided as far as possible under making in case of emergency to occur work due to friction situation repeatedly, because the different heat expansion coefficient of this overheated different materials owing to being fitted to each other can cause the distortion not wishing (normally the sinusoidal shape) occurred of the brake rotors comprising brake lining carrier and brake lining and pairing friction face can be caused to be distorted due to one-sided heat importing, this particularly produces interference in the case where there, although namely the possible constructions space of drg still should be less when the lock torque carrying out controlling is very high based on the requirement of compact form mode, as being exactly this situation in the drg of ventilating in an electromagnetic manner.

Also a kind of improvement project relative to known prior art should be set in ferrodo, it to be avoided between ferrodo and pairing friction face local overheating at the same time and high still guarantees the surface pressure that well-distributed is high as far as possible when wearing and tearing, described improvement project can manufacture at low cost and can with the spring pressure drg combined action of electromagnetism under applied technically without any problems and manufactured.

The solution of this object is achieved by the Feature Combination of claim 1.

What arrange is for this reason, described ferrodo is implemented with the region of two different hardness or layer, wherein, whole ferrodo is applied in carrier member, and the side towards carrier of the ferrodo in other words layer abutted on carrier has compared with soft and therefore has the elasticity of raising, and wherein, ferrodo away from the isolated with carrier member in other words of carrier member and the layer serving as friction face (for receiving work due to friction) there is higher hardness and therefore there is the elasticity of reduction.Simultaneously, according to the present invention, ferrodo has multiple space or gap in the region of soft ferrodo layer and/or in the region of high hardness ferrodo layer, these spaces or gap extend to the overall diameter of ferrodo and distribution and radially in the circumferential from the interior diameter of ferrodo, and described space or gap extend in the degree of depth of double-deck ferrodo completely or partially.

In order to avoid hot distortion described above or distortion and in order to reduce mechanical load, what also propose according to the present invention is, one or two ferrodo layers in two ferrodo layers are provided with space or gap structure all equably, and they partly or on the whole thickness of ferrodo run through ferrodo.Thus, can observe in experimental series in practice, the problem that the adjoint distortion of the wearing and tearing of local overheating and raising and distortion occur is able to obvious minimizing to make us unforeseeable mode.

By two layers and soft ferrodo layer and high hardness ferrodo layer construct and the another kind of beneficial effect being provided with the combination of the ferrodo of suitable space or gap structure be: the stability of the friction valve realized between described ferrodo and described pairing friction face is improved.

In addition, tool is advantageous, in accordance with the thickness relationship determined between high hardness ferrodo layer and soft ferrodo layer, effectively to realize desired beneficial effect especially.At this, show in practice, soft ferrodo layer should occupy at least 50% and maximum 80% of the whole thickness of ferrodo.

In addition, for the solution of this object, verified have advantage, and described soft ferrodo has the Shore hardness that about 30 arrive about 50 Shore D levels (ShoreD), and described high hardness ferrodo has the hardness of at least about 65 Shore D levels.

According to the present invention, provide a kind of ferrodo, it comprises soft ferrodo layer and high hardness ferrodo layer, wherein, described ferrodo is manufactured by one or more compacting and/or rolling process, thus forms the sealed connection of material between two ferrodo layers.

At this, it is contemplated that following diverse ways:

-combination of the loose mixture of powders for two ferrodo layers is suppressed or roll extrusion;

-combination be made up of the precompressed blank of the first ferrodo layer and the bulky powder compound of the second ferrodo layer is suppressed or roll extrusion;

-combination be made up of the precompressed blank of each soft ferrodo layer and the precompressed blank of a high hardness ferrodo layer is suppressed or roll extrusion.

In addition, it is contemplated that in order to the material behavior such as hardness or abrasive resistance of the determination that realizes described ferrodo, between pressing operation or afterwards or between rolling process or implement suitable hardening process afterwards.

Can just produce according to space that is of the present invention, that run through at least one ferrodo layer completely or partially or gap structure in one of described compacting or rolling process or made by non-cutting or the shaping of cutting in subsequent process.

Principle of work for ferrodo according to the present invention is learnt by dependent claims and to the description of accompanying drawing mentioned below with the advantageous details of other tools of manufacture.

Accompanying drawing explanation

At this:

Fig. 1 illustrates the cutaway view of double loop elevator brake;

Fig. 2 illustrates the cross-sectional plane of the brake rotors of the elevator brake in Fig. 1;

Fig. 3 illustrates the detail view A of the amplification of the brake rotors in Fig. 2;

Fig. 4 illustrates front elevation and the birds-eye view of brake rotors, wherein the first possible gap structure clearly visible;

Fig. 5 illustrates the detail view B of the amplification of the brake rotors in Fig. 4;

Fig. 6 illustrates front elevation and the birds-eye view of brake rotors, the gap structure that wherein clearly visible the second is possible;

Fig. 7 illustrates the detail view C of the amplification of the brake rotors in Fig. 6;

Fig. 8 illustrates front elevation and the birds-eye view of brake rotors, wherein the possible structure in clearly visible space;

Fig. 9 illustrates the detail view D of the amplification of the brake rotors in Fig. 6;

Figure 10 illustrates the space diagram of the elevator brake of electromagnetism, its relative axis sidewise mismatch;

Figure 11 illustrates the cross-sectional plane of the elevator brake in Figure 10;

Figure 12 illustrates the detail view E of the amplification of the brake rotors in Figure 11.

Detailed description of the invention

Fig. 1 illustrates the complete section face of the electromagnetic spring press-brake device FDB for elevator, and rotor (1) is applied in described spring pressure drg, the with good grounds ferrodo of the present invention (R) of described rotor equipment.Shown spring pressure drg (FDB) is embodied as double loop drg.That is, in the meaning of redundancy, exist two that be fixedly connected with electric machine casing or analogue, with the spring element be arranged in inside it (3) coil supporter (2), two in described spring pressure drg (FDB) can axial motion and the armature disc (4) supported in anti-relative rotation relative to the axis (A) of spring pressure drg (FDB) and two rotors (1), wherein, described rotor by the wheel hub (5) of external engagement and axle (6) in anti-relative rotation and can be connected with axial motion.The brake action of spring pressure drg (FDB) is achieved in the following way, namely, the spring element (3) be arranged in the spring eye (2.1) of coil supporter (2) is pressed to armature disc (4), and thus by rotor (1) at the pairing friction face (7) of armature disc (4) and the pairing friction face (7) of flanged plate (8) and clamp between the pairing friction face (7) and the pairing friction face (7) of a coil supporter (2) of armature disc (4).Thus, axle (6) is kept by the wheel hub (5) be fixedly connected with it and the rotor (1) be fixedly connected with described wheel hub (5) and is blocked for rotation.

In order to open spring pressure drg (FDB), the magnet coil (2.2) of coil supporter (2) is connected with power supply, magnetic field is formed thus between coil supporter (2) and armature disc (4), the brake action acting on described rotor (1) by the power traction extremely described coil supporter (2) of two armature discs (4) against spring element (3), and is cancelled in described magnetic field therefore.Thus, axle (6) can freely rotate about axis (A) again.

The cross-sectional plane of rotor shown in Figure 2 (1), its band is with good grounds of the present invention and here with the ferrodo (R) that the form of annulus is formed, and Fig. 3 illustrates the local of rotor (1) with details A, wherein its basic structure clearly visible.Correspondingly, described rotor (1) comprises the ferrodo carrier (1.1) with the ferrodo arranged in both sides (R), and described ferrodo carrier (1.1) is such as formed by metallic material or fiber composite materials.Described ferrodo (R) comprises again soft ferrodo layer (R2) and high hardness ferrodo layer (R1) respectively.

Suppressed in a procedure by mentioned two ferrodos that layer is formed (R) and form, thus form the sealed connection of material between described soft ferrodo layer (R2) and described high hardness ferrodo layer (R1).Only adhesive portion (1.2) can be set between ferrodo (R) and ferrodo carrier (1.1).

Equally, it is contemplated that following method, being wherein applied on described ferrodo carrier (1.1) when suppressing ferrodo (R), wherein, between ferrodo (R) and ferrodo carrier (1.1), forming the sealed connection of material.

In addition, also connection between ferrodo (R) and ferrodo carrier (1.1) can be formed by curing process.

Fig. 4 illustrates according to the front elevation being configured with the rotor (1) of Novel friction liner (R) of the present invention.The wherein structure of clearly visible space (AS) or gap (S), described space (AS) or gap (S) extends to its overall diameter diametrically from the interior diameter of the ferrodo (R) of annular arrangement.Schematically illustrate 8 gaps (S) in the diagram, these gaps have the angular distance of 45 degree each other.

Be similar to the described homogeneous texture with 45 degree of spacing between gap or space, can certainly it is contemplated that equably circumferentially distribute, the structure with the spacing being different from 45 degree or the structure had unevenly in the space circumferentially distributed or gap.

In Fig. 5, the clear possible rectangular cross section that described gap (S) is shown of details B, wherein, seamed edge (K) and/or bight (E) can be provided with suitable rounding or chamfered edge.In an example shown, the degree of depth in described gap (S) out extends to soft ferrodo layer (R2) from the surface of ferrodo (R), wherein, also it is envisaged that, the degree of depth in described gap (S) only runs through described high hardness ferrodo layer (R2), or the degree of depth of described gap (S) arrives described ferrodo carrier (1.1).

According to space of the present invention (AS) or gap (S), there is multiple beneficial effect in practice: the thermal deformation of described ferrodo (R) and described rotor (1) and the temperature due to side import to be eliminated by described space or gap in conjunction with the high mechanical load caused by the different heat expansion coefficient of described soft ferrodo layer (R2), described high hardness ferrodo layer (R1) and described ferrodo carrier (1.1).In addition, avoiding ferrodo (R) and pairing friction face (7) to occur possible bonding based on local overheating.Finally, guarantee issuable lost material to discharge fast in known manner by described gap (S).

Fig. 6 illustrates another front elevation of the rotor (1) being configured with Novel friction liner (R), and wherein, the ferrodo of described rotor and annular diametrically has the polygon geometric configuration of octagon form outside.The wherein structure of clearly visible gap (S), described gap (S) extends radially to the overall diameter of described ferrodo (R) from the interior diameter of the ferrodo (R) of described rotor (1), wherein, described gap (S) stretches when having a certain adjustment angle (W) relative to radial direction.In figure 6, exemplarily illustrate that again 8 circumferentially well-distributed gap (S), these gaps have the angular distance of 45 degree each other, wherein, here also it is contemplated that be different from the uneven distribution between the uniform angular distance of 45 degree or gap (S) with different spacing.

In the figure 7, details C clearly illustrates the trapezoidal cross-section of gap (S), and wherein, here seamed edge (K) and/or bight (E) also can be provided with suitable rounding or chamfered edge.In example shown here, the degree of depth of described gap (S) only runs through high hardness ferrodo layer (R1) from the surface of ferrodo (R).Here, it is also accomplished that, described gap (S) also will be less the degree of depth or gap (S) extend to ferrodo carrier (1.1).

Described gap (S) seems also almost only to extend on soft ferrodo layer (R2), and partly or on the whole thickness of soft ferrodo layer (R2), run through described soft ferrodo layer, wherein, described high hardness ferrodo layer (R1) can not have gap (S) or only have the gap of the very little degree of depth.

Other possible shape of cross sections in described gap (S) also can form triangle, face, its circular arc shape or cross-sectional plane shaping by different way, and such as it is that of the best in manufacturing technology.

Equally, be similar to Fig. 4 and Fig. 6, it is contemplated that gap structure or space, its trend starts on the interior diameter of ferrodo (R) in the mode of tangent line.In addition, described gap structure can follow the trend of helix line, cycloid or the geometrical curve of similar (dazu verwandten) with it.

By clearly visible another front elevation being configured with rotor (1) according to novel ferrodo (R) of the present invention of Fig. 8.At this, show the structure of described space (AS), it also extends to the overall diameter of ferrodo (R) diametrically from the interior diameter of the ferrodo (R) of rotor (1), wherein, described space (AS) its walk upwards have different, diametrically from the interior diameter of ferrodo (R) towards the width that the overall diameter of ferrodo (R) increases.Equally, it is also accomplished that the width of described space (AS) is walked upwards from interior diameter diameter reduction toward the outside at it.Exemplarily illustrate that 12 circumferentially well-distributed space (AS) in fig. 8, it has the angular distance of 30 degree each other, wherein, the uneven distribution between the uniform angular distance of 30 degree or described space (AS) with different spacing can also be realized being different from here.

In fig .9, detail D is the clear rectangular cross section that described space (AS) is shown finally, wherein, here seamed edge (K) and/or bight (E) can be provided with suitable rounding or chamfered edge, and wherein, also trapezoidal or leg-of-mutton cross-sectional plane again can be considered for described space (AS), or the cross-sectional plane that those its profiles are defined by a radius, or the cross-sectional plane of those the bests in manufacturing technology.

Equally, space (AS) can be arranged with a certain adjustment angle (W), the variation between 0 to 90 degree of described adjustment angle value, or the following trend in described space (AS) can be set, it follows the trend of helix line, cycloid or geometrical curve similar with it.

Be similar to Fig. 1, Figure 10 illustrates the another kind of transparent view for the electromagnetic spring press-brake device FDB of elevator, and rotor (1) is applied in described spring pressure drg, the with good grounds ferrodo of the present invention (R) of described rotor equipment.Shown here go out spring pressure drg (FDB) be also embodied as double loop drg, wherein, in two brake circuits one is only shown, it comprises coil supporter (2) and armature disc (4), wherein, the coil supporter (2) of described spring pressure drg (FDB) and armature disc (4) are relative to axis (A) sidewise mismatch of rotor (1), and wherein, the flanged plate (8) that described coil supporter (2) is fixedly arranged with position is fixedly connected with.

Figure 11 illustrates the cross-sectional plane in Figure 10, wherein, shows the closure state of described spring pressure drg (FDB).At this, can be parallel to the armature disc (4) that moves axis (A) by the spring element (3) of the spring eye (2.1) being arranged in coil supporter (2) press to be equipped with according to ferrodo of the present invention (R) and with axle (6) be connected in anti-relative rotation and axial movable rotor (1).Therefore, described rotor (1) to be clamped between the pairing friction face (7) of armature disc (4) and the pairing friction face (7) of flanged plate (8) and jointly to fix in anti-relative rotation with described axle (6) thus.

Clearly visible by ferrodo carrier (1.1) and the structure of rotor (1) that formed according to ferrodo of the present invention (R) by the details E shown in fig. 12, wherein, described rotor (1) is clamped between armature disc (4) and flanged plate (8).Here, two layers and high hardness ferrodo layer (R1) and soft ferrodo layer (R2) is also comprised according to ferrodo of the present invention (R).

Reference numerals list

Claims

1. (annular) ferrodo, it is for the manned and spring pressure drg (FDB) opened in an electromagnetic manner that is cargo lift, and wherein, ferrodo (R) comprises the ferrodo layer of two different hardness along the direction being parallel to axis (A),

It is characterized in that,

-towards the layer of ferrodo carrier (1.1) be soft ferrodo layer (R2),

-towards pairing friction face (7) layer be high hardness ferrodo layer (R1),

-in order to alleviate the thermal load of ferrodo when braking also therefore in order to realize the wear value little as far as possible with the pairing friction face (7) of pottery relative to metal, ferrodo (R) has multiple space (AS) or gap (S) in the region of soft ferrodo layer (R2) and/or in the region of high hardness ferrodo layer (R1), described space (AS) or gap (S) extend to the overall diameter of ferrodo (R) and distribution and radially in the circumferential from the interior diameter of ferrodo (R), described space (AS) or gap (S) extend to double-deck ferrodo (R1 completely or partially, R2) in the degree of depth.

2. ferrodo according to claim 1, it is characterized in that, the degree of depth of described space (AS) or gap (S) runs through high hardness ferrodo layer (R1) completely or partially, and described space (AS) or gap (S) opens wide completely or partially towards described pairing friction face (7).

3. ferrodo according to claim 1 and 2, is characterized in that, the degree of depth of described space (AS) or gap (S) runs through soft ferrodo layer (R2) completely or partially.

4. the ferrodo according to claim 1 or 3, it is characterized in that, described space (AS) or gap (S) radially extend to overall diameter from the interior diameter of described ferrodo (R) in the inside of ferrodo (R), and make with the form of close passage.

5. according to the ferrodo one of Claims 1-4 Suo Shu, it is characterized in that, described space (AS) or gap (S) mainly extends diametrically.

6. according to the ferrodo one of Claims 1-4 Suo Shu, it is characterized in that, described space (AS) or gap (S) becomes adjustment angle (W) to extend relative to radial direction, and adjustment angle (W) is greater than 0 ° and is less than or equal to 90 °.

7. according to the ferrodo one of Claims 1-4 Suo Shu, it is characterized in that, described space (AS) or gap (S) is radially with helix line, cycloid or extend with the form of geometrical curve like helix line, cycloidal type.

8. according to the ferrodo one of aforementioned claim Suo Shu, it is characterized in that, described space (AS) or gap (S) has rectangle or trapezoidal or leg-of-mutton shape of cross section.

9. according to the ferrodo one of claim 1 to 7 Suo Shu, it is characterized in that, the cross-sectional plane in described space or gap has following profile, and this profile comprises one or more round knot section.

10. according to the ferrodo one of aforementioned claim Suo Shu, it is characterized in that, described ferrodo (R) has the polygonal shape comprising n angle.

11., according to the ferrodo one of aforementioned claim Suo Shu, is characterized in that, described soft ferrodo layer (R2) has the Shore D level hardness of 30 to about 50, and described high hardness ferrodo layer (R1) has the Shore D level hardness of at least 65.

12., according to the ferrodo one of aforementioned claim Suo Shu, is characterized in that, described soft ferrodo layer (R2) and described high hardness ferrodo layer (R1) material are connected to each other in locking manner.

13. 1 kinds, for the manufacture of the method according to the ferrodo one of aforementioned claim Suo Shu, is characterized in that, the sealed connection of the material between two ferrodo layers is produced by one or more compacting and/or rolling process.

14. methods according to claim 13, is characterized in that one of following optional scheme:

-combination of the bulky powder compound for two ferrodo layers is suppressed or roll extrusion;

-combination of the bulky powder compound of the precompressed blank and the second ferrodo layer that comprise the first ferrodo layer is suppressed or roll extrusion;

-combination of the precompressed blank of the precompressed blank and a high hardness ferrodo layer that comprise each soft ferrodo layer is suppressed or roll extrusion.