EP2060346A2 - Densification tool, press comprising such tool and process for the densification of a sintered part or powder - Google Patents

Abstract

The tool (3) for the production of a sintered component such as toothed wheels with an external toothing and an internal toothing by solidifying the sintered component or the powder for the sintered component, comprises a clamping element (10) and a compression element (11), which is changeable radially related to its dimensions, with a contact surface for the sintered component and/or the powder, a guiding element arranged at and/or in the clamping element and having an external thread, which intervenes in an internal thread of the clamping element, and a spring element. The tool (3) for the production of a sintered component such as toothed wheels with an external toothing and an internal toothing by solidifying the sintered component or the powder for the sintered component, comprises a clamping element (10) and a compression element (11), which is changeable radially related to its dimensions, with a contact surface for the sintered component and/or the powder, a guiding element arranged at and/or in the clamping element and having an external thread, which intervenes in an internal thread of the clamping element, a spring element arranged between the clamping element parts and formed as a spring bellow made of elastomer, and a wedge groove is arranged in the compression element. The contact surface is formed with a surface complementary to the surface of the sintered component to be produced. The clamping element has a first oblique surface (12) and the compression element has a second oblique element complementary to the first oblique element. The oblique surfaces cooperate for widening and/or expanding or reducing the compression element. The clamping element and/or the compression element are relocatable in the axial direction, if necessary with a supporting element. The clamping element has a first clamping element part (19) and a second clamping element part (20), which are arranged one above the other in axial direction. The second clamping element part has a further oblique surface opposite to the first oblique surface. The compression element has the second oblique surface and an additional oblique surface opposite to the second oblique surface. The first oblique surface of the clamping element cooperates with the second oblique surface of the compression element and the further oblique surface of the clamping element cooperates with the additional oblique surface of the compression element. The compression element is formed as a double cone element. The first clamping element part is formed by a cone element with an outer cone and the second clamping element part is formed by a wedge plate with an inner cone. The compression element has an internal cone for intervening with the outer cone of the cone element and an external cone for intervening with the wedge plate. Slit-shaped releases are arranged in the compression element extending in the radial direction if necessary the releases have a drill and/or a recess at one of its ends in axial direction with a larger diameter than a width of the releases. The compression element has teeth with tooth tips at its contact surface for the sintered component and tooth bases arranged between the teeth. The tooth base is complementary to the teeth of the sintered component. The releases are extendingly arranged themselves from a limiting surface oppositely-lying to the teeth of the compression element in radial direction up to in an area of tooth tip circles and/or root circles of the teeth of the compression element. The releases in the area of the tooth tip circles starting from the limiting surface of the compression element extend themselves maximally only up to in the area of the root circles. The drill and/or the recess are formed at the ends of the releases in axial direction, where the releases lie close to the root circles. The releases end in the area of the root circles above the limiting surface. A depth of the releases, which extend themselves up to in the area of the tooth tip circles, is selected from an area up to an upper limit of 10% of an overall height of the compression element in axial direction. The releases are provided at its surface with an anti-adherent coating in an area-wise manner. The anti-adherent coating is formed as rubber coating, or by a lubricant e.g. polytetrafluoroethylene. An insert element e.g. a sleeve is arranged over the contact surface of the compression element for the sintered component and/or powder. A recess for the arrangement of a tool insert is arranged in the insert element and/or the compression element for the production of undercuts at the sintered component. The tooth tips are provided with a recess. The compression element is formed from lamella and/or segments that are individually arranged next to each other. Groove-shaped recesses are arranged at the lamella and/or segments in the form of a dovetails, and projections are complementarily arranged to the recesses. Recesses, in which the guiding element is insertable, have the lamella and/or segments. The clamping element is arranged between the supporting element and the compression element or the compression element is arranged between the supporting element and the clamping element in radial direction. The oblique surfaces have an inclination against a normal in axial direction, whose absolute value is selected from a region with a lower limit of 2[deg] and an upper limit of 30[deg] . The compression element has a height in the axial direction, where the height enables simultaneous insertion of the sintered components. Independent claims are included for: (1) a pressing device; and (2) a method for solidifying a powder to a sintered component in a tool.

Description

The invention relates to a tool for compacting a sintered component or a powder for the sintered component, a compacting device for compacting a sintered component or a powder for the sintered component, comprising at least one press element for applying the compacting pressure and a tool for compacting the sintered component into which the sintered component is insertable and which is arranged between an upper punch and a lower punch, a method for compacting a powder into a sintered component in a tool, after which the powder is filled into the tool and pressed into it, and a method for compacting a sintered component with a tool a pressing device, after which the sintered component is inserted into the tool and pressed in this.

The production of sintered components, in particular sintered gears - in the context of the invention is understood by a gear both a gear per se and a toothed belt or a sprocket - is now usually such that from a powder, such as a metal powder or a powder of an alloy , By pressing a so-called green compact is produced, this is optionally pre-sintered, further increased to increase the density in near-surface layers of the green compact and optionally to increase the dimensional accuracy of the sintered component of this calibration is supplied, which is also carried out under pressure , the green body is then sintered and optionally after sintering of a further calibration is supplied.

The object of the present invention is to be able to produce sintered components, in particular sintered gears or sintered components with teeth, more cost-effectively.

This object is achieved by the aforementioned tool, which has a clamping element and a radially variable with respect to its dimensions compression element with a contact surface for the sintered component or the powder, which is formed with a surface complementary to the sintered component to be produced in the system area surface wherein the tensioning element has an inclined first surface and the compression element has a complementary oblique second surface and the first and second inclined surfaces cooperate to spread or widen or narrow the compression element and wherein the tensioning element is displaceable in the axial direction, and which optionally has a support element, independently thereof by the above-mentioned pressing device, in which the tool is designed according to the invention, and by the method for compacting a powder to a sintered component or by the method for compacting a sintered component, wherein a tool is used formed according to the invention and the Kontor of the sintered component before or after the filling of the powder by spreading or widening or reduction of the compression element on the at least one first and at least one second inclined surface by moving at least a portion of the clamping element in the axial direction or Contour of the sintered component before or after the insertion of the sintered component by spreading or widening or narrowing of the compression element on the at least one first and the at least one second inclined surface by moving at least a portion of the clamping element in ax ialer direction is determined.

The advantage here is that with this tool or by this method sintered components can be produced with very high accuracy of the contour, wherein both the compaction and the calibration of the sintered powder or sintered component takes place in one operation, thereby compared to the prior art at least one operation, namely the calibration of the compacted sintered component, for example by rolling, eliminated and thus a corresponding cost reduction by shortening the workflow and savings in terms of tooling costs by reducing the necessary tools can be achieved. In so-called multiple wheels, which have a plurality of different gears on a wheel, it is possible with the tool according to the invention, even several operations, since normally each gearing must be calibrated separately to save. Thus, in particular, gears can be produced with the method which have a very high degree of concentricity. On the other hand, it is of course possible by appropriate geometry of the tool to produce so-called non-circular gears or sprockets or sintered components with more complex geometries, as is required for a variety of applications, such as in transmissions and motors. Likewise, with this tool by appropriate adaptation of the compression element and sintered components or gears produced, which have an undercut, as well as multiple wheels, in which the individual gears are separated by so-called rims. The production of the sintered components can be done without reducing the number of strokes of the pressing tool, so at already existing equipment only the tool must be replaced and no other restrictions exist in the manufacturing process. In addition, the tool is inexpensive to produce and can be purchased quickly and inexpensively replacement tools in case of a necessary replacement of a tool. Due to the structure of the tool, this is very variable with respect to various geometries of sintered components, in which only the compression element must be replaced. The tool is thus fully integrated into an existing calibration process. With the calibration of the sintered component can also be carried out a surface compression. Due to the simplicity of the tool, it is also associated with low set-up effort, so that downtime can be reduced. With the help of the tool but also a process improvement in terms of reproducibility by increasing the tool life is possible. In addition, at least approximately an isostatic pressing can thus be carried out, as a result of which the compression of the powder or of the sintered component can be made more homogeneous, and thus the characteristic port foil of the sintered component is likewise more homogeneous.

At or in the clamping element can be arranged at least one guide element which has an external thread which engages in an internal thread of the clamping element. It is thus possible in a simple and very accurate way to adjust the bias of the compression element.

The clamping element may comprise at least one first clamping element part and at least one second clamping element part, which are arranged one above the other in the axial direction, wherein the second clamping element part has a further oblique surface inclined in opposite directions to the first inclined surface and the compression element, the second inclined surface and another inclined thereto in opposite directions having inclined surface, wherein the first inclined surface of the clamping element with the second inclined surface of the compression element and the further inclined surface of the clamping element cooperate with the further inclined surface of the compression element. In particular, it is thus possible to form the compression element as a double cone element. It is possible in this way, on the one hand to further improve the accuracy of the sintered component insofar as tilting relative to a vertical of the inner surface, ie the mold surface, of the compression element can be avoided or compensated. Moreover, it is just the other way around, possible through different Delivery of the individual inclined surfaces just such a tilting of a surface of the compression element, which bears against the sintered component or sintering powder to be compacted, bring about, for example, to produce gears or sintered components, which - viewed in the axial direction - a frustoconical outer surface in the region of a toothing exhibit. Thus, the variability of the tool with respect to the sintered components to be manufactured is thus further increased. The oblique surfaces can have the same numerical value of the angle of inclination, and embodiments are possible in which the absolute values of the angles of inclination differ from one another.

At least one spring element can be arranged between the first clamping element part and the second clamping element part, that is, for example, a spring or in particular, according to an embodiment variant of the invention, a bellows, in particular made of an elastomer. It can thus be ensured, in addition to the guide element, that the two clamping element parts are at least approximately the same distance from each other over their entire circumference, even when pressurizing in the press, whereby tilting or tilting of the compression element can be better avoided and the density or the density profile in the sintered component can be made uniform.

The first clamping element part may be formed by a cone element with an outer cone and the second clamping element part by at least one wedge disk with an inner cone, wherein the compression element has an inner cone for engagement with the outer cone of the cone element and an outer cone for engagement with the wedge or disc (s) , whereby with a simple, not maintenance-intensive tool also interior deposits, eg Internal gears, can be produced.

To support the expansion of the compression element can be arranged in this at least one keyway.

In order to assist or facilitate the correct setting of the compacting element with regard to the sintered component to be produced, it is possible that slit-shaped free-ends extending in the radial direction are arranged which optionally have a bore or recess in the axial direction on at least one of their ends having a larger diameter than a width of the slot-shaped exemptions.

For the embodiment variant of the invention according to which a sintered gear wheel is produced, the compacting element can have teeth on its contact surface for the sintered component or the powder with tooth heads and tooth bases arranged therebetween, which is complementary to a toothing of the sintered component.

It is possible that the slot-shaped exemptions of one of the teeth of the compression element in the radial direction opposite boundary surface of the compression element are arranged extending into a region of the tooth tip circle and / or Fußkreises the teeth of the compression element or is it possible according to another embodiment, that the slot-shaped exemptions in the region of the tooth tip circle of the compression element in the radial direction, starting from the boundary surface of the compression element opposite the toothing of the compression element in the radial direction, extend at most only into the region of the root circle. In turn, the accuracy of the adjustment of the inner diameter or the inner dimensions of the compression element, which are of importance for the sintered component to be produced, can accordingly be made correspondingly fine or the variability of the adjustment possibilities can be increased.

For the reduction of stresses in the compression element due to the delivery via the clamping element, it is advantageous if the ends of the slot-shaped exemptions, which are closest to the root circle of the teeth of the compression element, are provided with the bore or recess in the axial direction.

Furthermore, it is possible that the slot-shaped exemptions in the region of the root circle in front of the boundary of the compression element in the radial direction opposite boundary surface of the compression element, whereby the interaction of the individual slot-shaped exemptions can be improved with each other.

In particular, it should be mentioned that a flank compression is adjustable by these slot-shaped exemptions.

A depth of the slot-shaped exemptions in the axial direction, extending radially into the Extending portion of the Zahnfußkreises, may be selected from a range up to an upper limit of 10% of an overall height of the compression element in the axial direction. It is achieved, inter alia, a better adjustability of the tip diameter of the gear to be produced or a better adjustability of the tooth geometry. These slot-shaped exemptions need not extend into the lateral lateral surface of the compression element.

At least some of the slot-shaped exemptions may have on their surface, at least in some areas, a non-stick coating, which may preferably be provided by a gumming or by a lubricant, such as e.g. a calibration oil, polytetrafluoroethylene, etc. is formed. It can be at least largely prevented that sintering powder can penetrate into the open, slot-shaped exemptions due to the pressing pressure or should this occur that the removal of this powder from the exemptions, for example with compressed air or by rinsing, e.g. with a flushing medium, can be facilitated.

Similarly, to cover this slot-shaped release, so as to avoid the penetration of sintered powder, it is possible that over the contact surface of the compression element, an insert element, e.g. a sleeve which optionally forms the toothing, is arranged. Of course, this insert element can be provided with a non-stick coating.

At least one recess for arranging a tool insert for the production of undercuts on the sintered component can be arranged in the insert element and / or the compression element. This increases the variability with regard to different geometries of sintered components which can be produced.

The tooth tips of the toothing of the compression element may be formed with a recess or depression in order to have a buffer volume available for the outflow of the material during pressing and thus to avoid tooth growth. Of course, such recesses or recesses for the same reason for the production of other sintered components, eg sintered components without a toothing, be arranged.

It is possible that the compression element is formed from individual lamellae or segments arranged side by side, which on the one hand makes it possible to construct this compression element in the manner of a kit or, on the other hand, if only a single one of these lamellae or segments is running the operation of the tool according to the invention are damaged or worn, that not the entire compression element must be replaced per se, but just just individual slats or segments.

For better positioning and holding of the lamellae or segments, groove-shaped recesses, e.g. in the form of a dovetail, and complementary elevations to be arranged, wherein these are arranged so that in the assembled state of the compression element, the elevation of a blade or a segment engages in the recess of another, adjacent blade arranged or adjacent segment, or , According to another embodiment variant, the lamellae or the segments may have recesses into which guide elements can be inserted. It is thus also simplifies the assembly of the compression element, although embodiments are possible within the scope of the invention, in which the lamellae or segments are held together by a clamp that surrounds this outside. In this case, in the slats or segments or in the clamping element, a corresponding recess for receiving this clip may be provided to allow an at least approximately full-surface concerns of the compression element on the clamping element.

Depending on whether an internal toothing or an external toothing is produced on a sintered component with the tool according to the invention, it is possible that the clamping element between the support element and the compression element or the compression element between the support element and the clamping element - viewed in the radial direction - is arranged, whereby the versatility of the use of the tool according to the invention can be further increased.

The inclined faces of the tool may have an inclination against a normal in the axial direction, which is selected from a range with a lower limit of 10 ° and an upper limit of 30 °, whereby the force required for the compression of the sintering powder or of the sintered component can be varied. It can thus be used with a shallower slope due to the shorter path, a greater force or at a greater inclination, a correspondingly lower force can be applied. It is possible in this way to vary the pressing pressure.

Due to the exact adjustability of the compression element in the tool according to the invention, it is possible to produce several parts at the same time in this tool with a correspondingly high accuracy, for which the compression element may have a corresponding height in the axial direction.

On the other hand, it is possible that in the pressing device according to the invention a plurality of tools according to the invention are arranged successively or one above the other, so as to carry out the compression stepwise and thus to further increase the density in the sintered component to be produced, it is generally possible with the tool itself almost Full density in the sintered component itself, so not only, as is known in the prior art, in the outer regions of such sintered components to produce. By arranging a plurality of tools in a pressing device according to the invention or in different stations, the approach to the full density of the sintered component can be further increased. It is thus also possible to produce or press several sintered components simultaneously via a plurality of superimposed tools.

It should be noted at this point that it is of course possible in the context of the invention to carry out the compaction so that sintered components, starting from its outer surface on which optionally the toothing is arranged or in internal teeth on the inner surface, in the direction of the each opposite surface may have a density gradient, for example, to produce sintered components having a corresponding hardness on the tooth surface and on another surface a higher elasticity.

Furthermore, it is possible that in the pressing device according to the invention, the lower punch has a wedge web, which engages in the keyway of the tool in order to automate the expansion of the compression element.

Finally, it is possible that guide elements are arranged above and / or below the tool, in particular die plates. It is thus possible a better horizontal guidance with changes in diameter of the compression element, which may optionally be dispensed with the guide elements in the clamping element.

Furthermore, the invention relates to the use of the tool for producing a sintered component with an external toothing and / or with an internal toothing.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Fig. 1

eine Pressvorrichtung in offener Stellung mit dem erfindungsgemäßen Werkzeug;

Fig. 2

eine erste Ausführungsvariante des Werkzeuges in Seitenansicht geschnitten;

Fig. 3

eine weitere Ausführungsvariante des Werkzeuges in Seitenansicht geschnitten;

Fig. 4

eine Draufsicht des Werkzeuges nach Fig. 3;

Fig. 5

ein Detail des Werkzeuges nach Fig. 3 in Seitenansicht geschnitten;

Fig. 6

die Ausbildung eines Verdichtungselementes in Doppelkonusform in Schrägansicht;

Fig. 7

eine Draufsicht auf das Verdichtungselement nach Fig. 6;

Fig. 8

eine Detail einer Ausführungsvariante eines erfindungsgemäßen Werkzeuges in Seitenansicht geschnitten;

Fig. 9

ein segmentiertes Werkzeug in Draufsicht;

Fig. 10

eine Ausführungsvariante des Werkzeuges zur Herstellung einer Innenverzahnung;

Fig. 11

eine Ausführungsvariante des Werkzeuges nach Fig. 10 zur Herstellung einer Innenverzahnung in Seitenansicht geschnitten;

Fig. 12

eine Ausführungsvariante der Erfindung zu Herstellung einer Schiebemuffe;

Fig. 13

einen Stempel zur Herstellung eines Sinterbauteils mit einer Innenfreistellung in Schrägansicht;

Fig. 14

den Stempel nach Fig. 13 in Seitenansicht geschnitten;

Fig. 15

den Stempel nach Fig. 13 in Draufsicht geschnitten;

Fig. 16

eine Ausführungsvariante des Werkzeuges zur Herstellung eines Sinterbauteils mit einer Hinterlegung von Innen in Schrägansicht;

Fig. 17

das Werkzeug nach Fig. 16 in Seitenansicht;

Fig. 18

das Werkzeug nach Fig. 16 in Draufsicht;

Fig. 19

einen Schnitt durch das Werkzeug nach Fig. 16.

Each shows in a highly schematically simplified representation:

Fig. 1

a pressing device in the open position with the tool according to the invention;

Fig. 2

a first embodiment of the tool cut in side view;

Fig. 3

a further embodiment of the tool cut in side view;

Fig. 4

a plan view of the tool after Fig. 3 ;

Fig. 5

a detail of the tool behind Fig. 3 cut in side view;

Fig. 6

the formation of a compression element in double cone shape in an oblique view;

Fig. 7

a plan view of the compression element according to Fig. 6 ;

Fig. 8

a detail of a variant of a tool according to the invention cut in side view;

Fig. 9

a segmented tool in plan view;

Fig. 10

an embodiment of the tool for producing an internal toothing;

Fig. 11

a variant of the tool according to Fig. 10 cut in side view for producing an internal toothing;

Fig. 12

an embodiment of the invention for producing a sliding sleeve;

Fig. 13

a stamp for producing a sintered component with an internal release in an oblique view;

Fig. 14

the stamp after Fig. 13 cut in side view;

Fig. 15

the stamp after Fig. 13 cut in plan view;

Fig. 16

an embodiment of the tool for producing a sintered component with a deposit from the inside in an oblique view;

Fig. 17

the tool after Fig. 16 in side view;

Fig. 18

the tool after Fig. 16 in plan view;

Fig. 19

a cut through the tool after Fig. 16 ,

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the position information selected in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to a new position analogous to the new situation. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

In Fig. 1 a press device 1 is shown, comprising a press element 2 for applying the compression pressure and a tool 3 for compressing at least the toothing of a sintered component or a sintered powder. The press element 2 comprises a lower punch receptacle 4 with a lower punch, an upper punch receptacle 5 with an upper punch, and a tool receptacle 6. The lower punch receptacle 4 and / or the upper punch receptacle 5 and / or the tool receptacle 6 are supported by columns 7, 8 and can be vertical along these be formed movable. Since such a pressing device 1 with the exception of the tool 3 is already known from the prior art, there is no need for further discussion at this point and the skilled person is referred to the relevant literature on this point.

Fig. 2 shows a first embodiment of the tool 3 cut in cross section. This tool 3 comprises a support element 9, a clamping element 10, as well as a compression element 11. The support element 9 is supported immovably by the tool holder 6. The clamping element 10 has a first inclined surface 12 which cooperates with a second inclined surfaces 13 of the compression element 11, said second inclined surface 13 having a complementary to the first inclined surface 12 inclination, so that therefore the two elements, ie the compression element 11 and the clamping element 12 along these two inclined surfaces 12, 13 are adjustable relative to each other.

Although in this embodiment, a separate support member 9 is shown, this is not necessarily required for the tool, since the support can be done for example only on the tool holder 6 or, if necessary, a separate support is not required, i. the support is provided by the tool itself.

The compression element 11 has an inner opening 14, which is provided on its surface 15 with a toothing 16. This toothing 16 is complementary to a toothing formed on a sintered component, so so that with the aid of the compression element 11, the toothing of the sintered component is compressed or generally the sintered component is compressed in itself or if a sintered powder is used and pressed, can this tooth 16 the geometry of the sintered component can be determined.

As sintering powder, for example sintered steel, powder of iron, copper, or in general It should be noted at this point that the invention is not limited to a particular material.

About the two inclined surfaces 12, 13 and the achievable axial relative displacement of the compression element 11 to the clamping element 10, a diameter 17 of the opening 14 can be adjusted, and thus the accuracy of the sintered components to be produced can be increased. With the help of the inclined surfaces 12, 13, it is also possible to compensate for a tilting of the compression element 10 against a normal in the axial direction or deliberately cause this, depending on which sintered components to be produced.

It should be mentioned at this point that as sintered components are primarily understood to mean such sintered components, which have a toothing, said toothing can be arranged both inside and outside of the sintered component, so an internal toothing or external toothing can be produced. Examples include gears, timing pulleys, sprockets, sliding sleeves, coupling bodies, sintered components with collars, i. Components which consist of a material other than the sintered component and which are held in this synchronous hub connections to drive shafts, in which case an increase in strength due to the high density is possible, with the inventive tool or according to the inventive method in the sintered component is reached, etc. There are also gears with Verzahnungsballigkeiten, ie a Breite balligkeit, producible. It is also possible with the aid of the tool according to the invention 3 sintered components with undercuts, so for example, gears with ribs or so-called one-piece multiple gears, in which this gear has a plurality of mutually different teeth to produce.

The tool 3 according to the invention is in addition to its use for the direct compression of sintered powder both of metals and metallic alloys optionally with other additives, as are customary in the production of sintered components, especially for the densification and calibration in a single step of already pressed Sintered component semi-finished products usable. If necessary, these semi-finished products can already be pre-sintered.

The Fig. 3 and 4 show that tool 3 cut in side view or in plan view, which in the pressing device 1 according to Fig. 1 is arranged. In this embodiment of the tool 3, the compression element 11 is formed as a double cone element, wherein this next to the inclined surface 13 has a further inclined surface 18 with an inclination of the first inclined surface 13 opposite inclination against a normal in the axial direction. In particular, these two inclinations may be the same amount, so have the same angle in terms of its numerical value, but it is also possible embodiments in which these angles differ from each other in terms of their amount, ie numerical value.

The associated clamping element 10 is formed in this embodiment in two parts with a first lower clamping element part 19 and a second upper clamping element part 20. The first lower clamping element part 19 has the first inclined surface 12, which is formed with respect to their inclination complementary to the inclined surface 13 of the compression element 11 and the second clamping element part 20 also has a sloping surface 21, which is complementary to the further inclined surface 18 of the compression element 11th is formed and interacts with this.

The two clamping element parts 19, 20 are in the axial direction of the tool 3 relative to each other adjustable, whereby the adjustment of the compression element 11 can be made more accurate, in particular, a tilting of the inner surface 15 of the compression element 11, which has the teeth 16, against the normal in axial direction better balanced or corrected. It can thus the concentricity of interlocking equipped with sintered components, in particular gears, further increased or - can be prepared with the inventive tool 3 on so-called non-circular gears - is also the setting of a non-circular contour with higher accuracy possible.

For better insertion of already pre-pressed sintered semi-finished products in the compression element 11, the diameter 17 of the opening 14 of the compression element 11 may be formed in a receiving area 22 at least approximately conically widening, as is apparent Fig. 3 is apparent. It should be noted, however, that this feature does not necessarily have to be present in the tool 3 according to the invention.

In the execution of the tool 3 after Fig. 3 Also, the support member 10 is formed in two parts with a lower support member part 23 and an upper support member 24, the movement with the lower support member 23, for example via screws 25, is connectable. The upper support element part 24 is formed projecting towards the lower support element part 23 in the direction of the clamping element 10 and the lower clamping element part 19 has a corresponding projection in the direction of the support element 9, so that the lower clamping element part 19 is fixed in a fixed manner between the two support element parts 23, 24 can be and thus only the upper clamping element part 20 is vertically adjustable relative to the lower clamping element part 19.

Like from the 4 and 5 it can be seen, four guide elements 26 are in the form of screws formed on the clamping element 10 in this embodiment, which have an external thread, which engage in an internal thread of the clamping element 10, in particular the lower clamping element part 19. It can on these guide elements 26, the altitude of the upper Clamping element part 20 are fixed with respect to the lower clamping element part 19 and thus the setting of the compression element 11 can be set.

It should be noted that, although in the embodiment according to the Fig. 3 to 5 four guide elements 26 are arranged, it is of course also possible to provide a different number of guide elements 26, for example, 3, 5, 6, etc.

In order to fix the relative position of the upper clamping element part 20 with respect to the lower clamping element part 19 better, it is advantageous if, as in Fig. 3 is shown between these at least one spring element 27 is formed or arranged, for example, a conventional spring or preferably a bellows, which is in particular at least partially made of an elastomer. By means of the latter variant, it is possible to set the force, which is opposed by these spring elements 27 to the delivery of the upper clamping element part 20 via the guide elements 26, at least within certain limits.

Again, in particular four spring elements 27 can be arranged here, which correspond (viewed in the circumferential direction) between the guide elements 26 Fig. 4 disposed are. Again, it is again possible to provide more or less of these spring elements 27, for example 3, 4, 5 or the like.

How out Fig. 3 dashed lines can be seen, it is possible to provide a particular circumferential keyway 28 in the lower region of the compression element 11 in order to simplify or facilitate an expansion of this compression element 11. In particular, a corresponding wedge-shaped peripheral web of the tool holder 6 of the pressing device 1 (FIG. Fig. 1 ) may be formed engaging in this keyway 28. In particular, the lower clamping surface of the opening 14 can likewise be changed or influenced via this keyway 28, in addition to the adjustment via the inclined surfaces 12, 13.

In Fig. 5 a section of the tool 3 is shown, wherein in particular the guide element 26 can be seen, which engages via an external thread in an internal thread of the lower clamping element part 19 and the upper clamping element part 20 preferably has a stop 29 to the vertical adjustability of the guide member 26 limit, wherein this stop 29 also serves to deliver the upper clamping member 20 by the horizontal displacement of the guide member 26 to the lower clamping member 19.

In the 6 and 7 the compression element 11 is shown in an oblique view and in plan view. In particular, slit-shaped free position 30 can be seen from these two figures, via which the adjustability and thus the adaptability of the diameter 17 of the opening 14 can be carried out more simply or more accurately. It is in these 6 and 7 shown a plurality of different slot-shaped exemption 30, in particular slot-shaped exemptions 30, which are formed at a distance to a tooth tip circle 31 of the compression element 11 starting in the radial direction on an opposite boundary surface 32 of the compression element 11 extending. Furthermore, these exemptions may be 30, like this Fig. 7 it can be seen that in the region of the tooth tip circle 31, at most, only up to a region of a root circle 33 can be designed to extend. In addition, it is possible that slot-shaped exemptions 30 starting at the root 33 are formed in the radial direction extending to the boundary surface 32, wherein the exemptions 30 are formed open in the direction of the opening 14 of the compression element 11.

Those exemptions 30, which are formed extending in the direction of the tooth tips of the toothing 16, extend over the entire height of the compression element 11, as is apparent from Fig. 6 is apparent.

How far out Fig. 6 It can be seen that those exemption 30, which are formed extending in the radial direction on the boundary surface 32 in the region of the root circle 33, not over the entire height of the compression element 11 and can this example in the axial direction, starting at an outer end surface 34th of the compression element 11, extend over a height or depth, which is selected from an area with an upper limit of 10% of the total height of the compression element 11 in the axial direction. This depth can therefore be between 0% and 10%.

At least some of these slot-shaped exemptions 30 may have a bore 35 at their end region in order to achieve better stress relief. These holes 35 may be formed throughout the compression element 11 or over a portion of the height of the compression element 11, starting from one or both end surfaces 34 of the compression element 11 is possible.

It should be noted at this point that the exemptions 30 also at the outer ends - viewed in the radial direction - can have holes for stress relief.

It is of course also possible to have other geometrical arrangements of these exemptions 30 than those in FIG 6 and 7 is shown to provide. For example, only exemptions 30 can be arranged in the region of the tooth heads or the tooth bottoms of the toothing 16. On the other hand, the slot-shaped exemptions 30 may have a different geometric shape, for example wedge-shaped or the like. The production of these exemptions 30 is preferably carried out by the so-called wire EDM, but can also be done via other mechanical processing methods.

• ausgebildet sein kann, (nicht dargestellt). In diesem Fall ist es möglich, sofern die Freistellungen 30 angeordnet werden, dass diese in Form von Hinterschneidungen in diesen z.B. im Kantenbereich ausgebildet sind. Eine Lamelle bzw. ein Segment kann aber auch mehr als einen Zahn, z.B. zwei, drei oder vier umfassen.

The compression element 11 may also be made of individual lamellae or individual segments, wherein, for example, a lamella or a segment can correspond approximately to the width of a tooth of the toothing 16 and wedge-shaped in the radial direction - seen in plan view

• may be formed (not shown). In this case it is possible, provided the exemptions 30 are arranged so that they are formed in the form of undercuts in these, for example, in the edge region. However, a lamella or a segment may also comprise more than one tooth, for example two, three or four.

If a sintering powder is pressed with the tool 3 according to the invention, there is the risk that powder particles will penetrate into these exemptions 30, if they are arranged, whereby the adjustment or adjustment of the compacting element 11 via these exemptions 30 is no longer possible or made more difficult , For this case it is possible within the scope of the invention that these exemptions 30 are provided with a non-stick coating, for example with a gumming or a lubricant, such as e.g. a calibration oil or polytetrafluoroethylene or a lubricating varnish. It is possible in this way that penetrated powder can be easily removed from these exemptions 30, for example with air by blowing out of the compression element 11, this blowing can optionally be automated, so automatically after each compression step or after several compression steps in the pressing device 1 Compressing element 11 is blown out, for which purpose corresponding provisions can be provided on the pressing device 1, for example a compressed air connection with corresponding nozzles, which are directed or directable to the compression element 11. Also, rinsing with another fluid, e.g. with a rinsing liquid is possible.

Also to avoid the penetration of sintered powder in these slot-shaped exemptions 30 and / or to protect the teeth 16 of the compression element 11, as can be seen from Fig. 3 it can be seen above the toothing 16 an insert element 36 may be arranged. This insert element 36 may for example have a wall thickness of 2 mm, which wall thickness can be determined by the strength of the material used for this purpose, said insert element 36 has no supporting function and thus can be made very thin or should this insert element 36 to the Adapt tooth flanks, as well as the flank movements during the adjustment of the tool 3 run with, to allow adaptation to the desired geometry of the sintered component to be produced or semi-finished semifinished product.

With the help of the keyway 28, a larger measure of the opening 14 is possible, so that larger sintered components can be inserted.

Although not shown, at least one recess or recess may be formed in the tooth heads, in order to be able to absorb material flowing out during the compression and to avoid tooth growth.

The tool 3 after the Fig. 1 to 7 is suitable for producing an external toothing on the sintered component to be produced. Since in principle but also the production of a so-called internal toothing is possible, it is of course possible in the invention that not the clamping element 10 is disposed between the support member 9 and the compression member 11, but the compression member 11 between the support member 9 and the clamping element 10th is arranged (in the radial direction).

It is also possible that a length or height of the compression element 11 or of the entire tool 3 in the axial direction is dimensioned so that a plurality of sintered components, i. Semi-finished semifinished products into the tool 3, i. the openings 14 of the compression element 11, can be inserted and simultaneously compressed and calibrated. Optionally, separating agents, for example separator sheets, cutting discs or the like, can be arranged between the individual sintered components.

For example, the absolute values of the angles of the inclined surfaces 12, 13, 18, 21 may be selected from a range having a lower limit of 2 ° and an upper limit of 30 °. It is thus possible to vary the applied force over the length of the adjustment.

In particular, in the embodiment double-cone insert, it is possible to produce over the inclined surfaces 12, 13, 18, 21 cylindrical contours with very high accuracy or is it also possible to produce sintered components which are frusto-conical, such as bevel gears.

With the tool according to the invention, not only is compression of the edge zones achieved, as is achieved, for example, in surface compacting by rolling, which is known from the prior art, but it is thus possible to achieve at least approximately full density in the sintered component, ie the proportion of pores in the sintered component becomes almost zero.

On the other hand, it is also possible to set a density gradient, starting from full density in the area of the toothing 16, to a lower density in the sintered component interior, wherein this density gradient may in particular have a flat course.

The arrangement of the spring elements 27 is particularly advantageous if for the inclined surfaces 12, 13, 18, 21 a relatively shallow angle, i. a flat inclination relative to the normal in the axial direction, for example in the range between 10 ° and 15 °, is selected, since it thus supports the clamping of the compression element 11.

It is further possible within the scope of the invention, in order to further approximate the achieved density of the sintered component to the full density, to provide a plurality of these tools 3 according to the invention in the pressing device 1 or in a plurality of pressing devices 1 arranged one behind the other, so that a stepwise compacting takes place.

With the aid of these inventive tools 3, for example, an adjustment of the flanks of the teeth of the toothing 16 and the inner, open diameter of the tool of up to 20% is possible.

During the delivery or adjustment of the compression element 11, it is possible that individual of the slot-shaped exemptions 30 at least in the region of the opening 14 of the compression element 11 is tapered. In others, it is again possible that the gap width remains unchanged due to the clamping.

It is further within the scope of the invention, the possibility that the adjusting element in the axial direction in the region of the mold surface (s) at least one exemption for the production of sintered components with a projection or at least one projection in the direction of the mold cavity for the production of sintered components with an undercut , This exemption (s) or the projection / projections extend starting from the end face 34 in the direction of the opposite end face of the compression element 11 and may extend over only a part of the height or over the entire height of the compression element 11.

In Fig. 8 is a further embodiment of the tool according to the invention 3 shown in fragmentary form. This in turn has the support element 9, for example, a support ring, the clamping element 10 with the two opposite inclined surfaces 12, 13, and thereafter - viewed in the radial direction from outside to inside - the compression element 11 in a double cone design. Pointing to the compression element 11 in the direction of a mold cavity 37, the insert element 36 is arranged in the form of a sleeve in this embodiment variant. Only to illustrate the principle, this sleeve is shown with a flat, straight surface, ie without complex geometry. Of course, it is possible to choose the surface geometry that is complementary to the component to be produced, almost arbitrary and provide corresponding shapes or generally referred to as figures, so that not only a sintered component in the form of a simple ring can be formed. This insert element 36 is dimensioned in its wall thickness, or formed from a suitably flexible material that it performs the diameter change due to the change in the relative position of the clamping element 10 to the compression element 11 with or not hindered. In Fig. 8 For this purpose, a width 38 of the adjustment range is shown.

Unlike the above embodiments are for guiding the tool 3, in particular during the diameter adjustment or pressing, in the variant according to Fig. 8 an upper and a lower guide plate 39, 40, for example in the form of die plates provided, which are arranged so that they cover the compression element 11, the clamping element 10 and at least a portion of the support element 9 in the radial direction. In this case, in addition, the lower guide plate 40 may be received by the support member 23.

It should be with this Fig. 8 also be clarified that the invention is not limited to the production of sintered components with teeth, such as gears and sliding sleeves of gears, synchronizer rings, gears of belt drives or gear drives, these are generally understood, ie, for example, helical teeth, spur gears, front teeth, bevel gears, etc ., Is limited, although it shows the particular advantages of the tool 3, but arbitrarily configured sintered components with high precision and optionally high density can be produced.

For the production of more complex surface geometries, eg undercuts on the Sintered component, tool inserts may be provided which at least partially the insert member 36, or should this not be present, penetrate the compression element 11.

Fig. 9 This consists of four segments 41 which are composed of a wedge disk with a conical course of an inner surface 42. At least two of these segments 41 have a recess 43 which, at least approximately - viewed in plan view - the half form a dovetail-shaped recess, so that in the assembled state of the segments 41, these recesses 43 of two adjacent segments 41 yield a dovetail-shaped recess in which a guide element with the recess corresponding cross-section can be arranged. Of course, all segments 41 - although not shown - have these recesses.

Another embodiment for this purpose may provide that on a segment 41, a projection and a complementary recess are formed so that when assembling the segments 41, a projection engages in the recess of the adjacent segment 41 to be arranged. Again, dovetailed versions are possible.

These embodiments can also be applied to the above-mentioned slats or segments.

Due to the segment-like or lamellar design of the compression element 11 of the adjustment can be increased, compared to a one-piece compression element eleventh

The recesses 43 need not necessarily be such that a dovetail-shaped cross-section, viewed in plan view, results, but other cross-sections may also be chosen.

Fig. 10 shows a variant of the tool 3 for the production of sintered components with an internal toothing. This tool has the, for example, annular support member 9, the compression element 11 in the form of a double cone insert and the clamping element 10th with the two inclined surfaces 12, 13, which is in operative connection with the compression element 11. Between the support member 9 and the compression member 11 of the mold cavity 37 is formed, wherein the complementary teeth 16 for producing the internal toothing is arranged on the opposite surface of the double-cone-shaped compression element 11. In this variant, therefore, the clamping element 10 is arranged centrally in the tool.

With regard to the further embodiments of this variant, e.g. the arrangement of die plates, etc., reference is made to the above statements to avoid repetition.

An advantage of this variant is that undercuts, for example for the production of coupling bodies, can be accomplished relatively easily by an opening 44 are provided in the support member 9, through which a tool insert 45 can be passed to form the undercut, for example adjustable, segmented ring elements that for the ejection of the sintered component from the tool 3 at least partially, but at least from the mold cavity 37 - correspond to double arrow 46 - can be pulled into the rest position, as in Fig. 10 is shown in dashed lines. These undercuts or recesses in the surface of the sintered component or openings through the sintered component need not be circumferentially provided over the entire sintered component, as is the case with sliding sleeves for automotive applications, but can with appropriate adaptation of the tool insert this in discrete Regions of the sintered component can be arranged.

In a variant to Fig. 10 shows Fig. 11 another possibility with the tool 3 to produce a sintered component with an internal toothing or another geometric interior figure. In this variant, the compression element 11 is also designed as a double cone element, however, its inclined surfaces extend in comparison to the embodiment according to Fig. 10 contrary to form a pointing in the direction of the clamping element 10 circumferential edge 47. The at least two-part clamping element 10 has the complementary to the inclined surfaces of the compression element 11 inclined surfaces 12, 13. By the opposite movement of the parts of the clamping element 10 according to the vertical double arrow 48, the movement of the compression element 11 corresponding to the horizontal double arrow 49 is caused, ie a radial pressing movement by axial machine movement generated, as in all embodiments of the invention.

In Fig. 12 Finally, a possible embodiment of the tool 3 for producing a sliding sleeve is shown. In this case, a wave-shaped shaping element 50 is centrally arranged, which has on its outer surface, the toothing 16 for forming the toothing of the sliding sleeve. Between the insert element 36, which bears against the compression element 11, which again has a double-cone shape, and this shaping element 50, the mold cavity 37 is formed. In the compression member 11 and the insert member 36 recesses 51, 52 are provided, in which the tool insert 45 according to double arrow 46 radially adjustable to form a circumferential groove on the outer end face of the sliding sleeve, is arranged. The shaping element 50 may be guided by the upper and / or lower guide plate 39, 40 or optionally be formed on the upper or lower guide plate 39, 40.

The further design of the tool 3 can be made in accordance with the above statements. It is further possible within the scope of the invention that, instead of a single upper or lower guide plate 39, 40, a plurality of upper and / or lower guide plates 39, 40 are provided.

A variant for execution Fig. 12 for producing a sintered component with an internal release, for example, a coupling body of a transmission is in the Fig. 13 to 15 shown in FIG. For a better overview, not the entire tool 3 is shown, but only the parts relevant for the production of the internal relief. In the sleeve-like insert member 36, which - although not shown - itself may have a corresponding surface geometry for shaping surface geometries of the sintered component, at least one, the insert member 36 penetrating, horizontally according to double arrow 54 movable punch 55 is disposed on an adjusting element 56. The adjusting element 56 is in turn adjustable in the vertical direction on a holder 57, such as a core pin arranged. To hold the insert member 36 to the sleeve holder 57, the latter with a cross-sectional widening - as in the upper part of Fig. 14 shown - and the inner recess of the insert member 36, in which the holder 57 is arranged, corresponding to be formed complementary.

The punch 54 is approximately L-shaped. The adjusting element 56 is formed as a cone bar. In the area of cooperation of the punch 55 with the adjusting element 56, a guide 58 for the punch 55 is arranged on the latter, e.g. a web with dovetailed cross-section, which engages in a corresponding groove on the back of the punch 55, or vice versa. This guide 58 is formed inclined at an acute angle to the longitudinal central axis, as well as the corresponding leg of the punch 55, so that an upward or downward movement of the adjusting element 56 is converted into a radial movement of the punch 55 and this moves out of the insert element 36 or, for demolding of the sintered component, in this einfährt. For the axial movement of the adjusting member 57 may also be arranged a corresponding guide between this and the holder 57.

Of course, a plurality of such punches 55 can also be arranged in an insert element 36 to produce a plurality of internal reliefs, possibly grouped together or all on a single adjustment element 56, in this case the holder 57 e.g. surrounded sleeve-like, can be actuated.

In the Fig. 16 to 19 a variant of the tool 3 for producing a sintered component is shown with a deposit from the inside. This tool 3 comprises the compression element 11, which is formed in this embodiment as a conical temple, and a two-part clamping element 10 with a conical element 59 and a wedge disk 60. The representation of the tool holder was omitted for reasons of clarity. Likewise, the workpiece holder is not shown, which may be formed for example by a sleeve, which can be arranged above the wedge disk 60 to form the mold cavity 37 (not shown) extending around the compression element 11.

In Fig. 19 In addition, a workpiece 61 to be produced, ie a sintered component, is indicated by dashed lines.

This tool 3 can serve, for example, for producing internal toothing on a sintered component, but depending on the surface design of the compacting element 11, other sintered components can also be produced at the abutment with the workpiece 61.

Essentially, the clamping element 10 can also be understood in this embodiment as a "double cone", although the two cones on the two components cone member 59 and wedge disk 60, which form the two above-mentioned clamping elements (19,20) are divided. The cone member 59 has in the region of the engagement in the compression element 11 an outer cone to form the inclined surface 12. The compression element 11 has, in the upper, the conical element 59 facing end region on an inner cone to form the inclined surface 13, wherein the inclined surface 13 is complementary to the inclined surface 12 of the outer cone of the cone member 59. Below this area, the compression element 11 is formed with an outer cone, the inclined surface 21 is complementary to the inclined surface 18 of the inner cone of the wedge disk 60, which is in operative communication with the compression element 11 in this area, so that the wedge disk 60 on the outer cone of the compression element 11th can be moved axially.

As in Fig. 17 indicated by dashed lines, the compression element 11, in turn, the exemptions 30, so-called. Relaxation sections for the radial relaxation, have. It is thus the radial mobility of the compression element 11 allows.

The compaction of the workpiece 61, i. the sintered component or the powder for the sintered component, takes place in such a way that the compression element 11 is spread over the cone element 59 by its axial displacement at least in the area of the workpiece 61 and presses against the retained workpiece 61. The wedge disk 60, or when multiple wedge disks 60 are used, are during this "raised", so that the radial movement of the compression element 11 is not hindered. For the demolding of the workpiece 61, the cone member 59 is brought out of engagement with the compression element 11 and reduced over an axial movement of the wedge disk (s) 60 of the diameter of the compression element 11 again, whereby this is brought out of engagement with the workpiece 61.

The compression element 11 may also consist in this variant of the tool 3 of individual slats or segments, which are held together by the wedge disk (s) 60.

If appropriate, an insert element 36, optionally with a punch 55, can also be provided in this embodiment between the sintered component to be produced and the compacting element 11.

All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

The embodiments show possible embodiments of the tool 3, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are mutually possible and this variation possibility due to the teaching of technical action representational invention in the skill of those skilled in this technical field. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of order, it should finally be pointed out that for a better understanding of the construction of the tool 3, this or its components have been shown partially unevenly and / or enlarged and / or reduced in size.

The problem underlying the independent inventive solutions can be taken from the description.

Above all, the individual in the Fig. 1 ; 2 ; 3 . 4 . 5 ; 6 . 7 ; 8th ; 9 ; 10 ; 11 ; 12 ; 13 . 14 . 15 ; 16 . 17 . 18, 19 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

REFERENCE NUMBERS

1

pressing device

2

press element

3

Tool

4

Lower punch recording

5

Punch recording

6

tool holder

7

pillar

8th

pillar

9

support element

10

clamping element

11

compression element

12

area

13

area

14

opening

15

surface

16

gearing

17

diameter

18

area

19

Clamping element part

20

Clamping element part

21

area

22

reception area

23

Supporting element part

24

Supporting element part

25

screw

26

guide element

27

spring element

28

keyway

29

guide element

30

spring element

31

Addendum circle

32

boundary surface

33

root circle

34

face

35

drilling

36

insert element

37

mold cavity

38

width

39

guide plate

40

guide plate

41

segment

42

surface

43

recess

44

breakthrough

45

tool insert

46

double arrow

47

edge

48

double arrow

49

double arrow

50

shaping element

51

recess

52

recess

53

54

double arrow

55

stamp

56

adjustment

57

ferrule holder

58

guide

59

cone element

60

wedge disk

61

workpiece

Claims (34)

A tool (3) for compacting a sintered component or a powder for the sintered component, comprising a clamping element (10) and a radially dimensionally variable compacting element (11) with a bearing surface for the sintered component or powder facing the surface the clamping element (10) has an oblique first surface (12) and the compression element (11) has a complementary oblique second surface (13) and the first and the second inclined surface (12, 13) for the spreading or expansion or reduction of the compression element (11) cooperate, and wherein the clamping element (10) and / or the compression element (11) is displaceable in the axial direction or are, and optionally with a support element (9). Tool (3) according to claim 1, characterized in that on or in the clamping element (10) at least one guide element (26) is arranged, which has an external thread which engages in an internal thread of the clamping element (10). Tool (3) according to claim 1 or 2, characterized in that the clamping element (10) has at least one first clamping element part (19) and at least one second clamping element part (20), which are arranged one above the other in the axial direction, wherein the second clamping element part (20 ) has a further inclined surface (18) opposite to the first inclined surface (12), and the compacting element (11) has the second inclined surface (13) and a further obliquely inclined surface (21) opposite thereto, wherein the first inclined surface (12) of the clamping element (10) with the second inclined surface (13) of the compression element (11) and the further inclined surface (18) of the clamping element (10) with the further inclined surface (21) of the compression element (11) cooperate. Tool (3) according to claim 3, characterized in that the compression element (11) is designed as a double cone element. Tool (3) according to claim 3 or 4, characterized in that between the first clamping element part (19) and the second clamping element part (20) at least one spring element (27) is arranged. Tool (3) according to claim 5, characterized in that the spring element (27) as a bellows, in particular made of an elastomer, is formed. Tool (3) according to claim 3, characterized in that the first clamping element part (19) by a cone element (59) with an outer cone and the second clamping element part (20) by at least one wedge disk (60) is formed with an inner cone, wherein the compression element (11) has an inner cone for engagement with the outer cone of the cone member (59) and an outer cone for engagement with the wedge disc (s) (60). Tool (3) according to one of the preceding claims, characterized in that in the compression element (11) at least one keyway (28) is arranged. Tool (3) according to one of the preceding claims, characterized in that in the compression element (11) extending in the radial direction, slot-shaped exemptions (30) are arranged, of which optionally at least one at least one of its ends a bore (35) or Having recess in the axial direction with a larger diameter than a width of the slot-shaped exemptions (30). Tool (3) according to any one of the preceding claims, characterized in that the compression element (11) has on its contact surface for the sintered component or the powder toothing (16) with tooth heads and tooth surfaces arranged therebetween, which is complementary to a toothing of the sintered component , Tool (3) according to claim 10, characterized in that the slot-shaped exemptions (30) from one of the toothing (16) of the compression element (11) in the radial direction opposite boundary surface (32) of the compression element (11) into a region of a tooth tip circle (31) and / or root circle (33) of the toothing (16) of the compression element (11) are arranged to extend. Tool (3) according to claim 10 or 11, characterized in that the slot-shaped exemptions (30) in the region of the tooth tip circle (31) of the compression element (11) in the radial direction starting from the toothing (16) of the compression element (11) in radial Direction opposite boundary surface (32) of the compression element (11) a maximum extend only in the region of the root circle (33). Tool (3) according to claim 11 or 12, characterized in that the bores (35) or recess in the axial direction at the ends of the slot-shaped exemptions (30) are formed, which the Fußkreis (33) of the toothing (16) of the compression element (11) are closest. Tool (3) according to any one of claims 11 to 13, characterized in that the slot-shaped exemptions (30) in the region of the root circle (33) in front of the toothing (16) of the compression element (11) in the radial direction opposite boundary surface (32) of Compression element (11) ends. Tool (3) according to one of claims 9 to 14, characterized in that a depth of the slot-shaped exemptions (30) in the axial direction, which extend into the region of the Zahnfußkreises is selected from a range up to an upper limit of 10th % of an overall height of the compression element (11) in the axial direction. Tool (3) according to any one of claims 9 to 15, characterized in that at least some of the slot-shaped exemptions (30) are provided on their surface at least partially with a non-stick coating. Tool (3) according to claim 16, characterized in that the non-stick coating is formed as a rubber coating, or by a lubricant, such as PTFE, is formed. Tool (3) according to one of the preceding claims, characterized in that over contact surface of the compression element (11) for the sintered component or powder an insert element (36), for example a sleeve, is arranged. Tool (3) according to claim 18, characterized in that in the insert element (36) and / or the compression element (11) at least one recess (48, 49) for arranging a tool insert (45) for the production of undercuts on the sintered component is arranged , Tool (3) according to any one of claims 10 to 19, characterized in that the tooth heads of the toothing (16) of the compression element (11) are provided with a recess. Tool (3) according to one of the preceding claims, characterized in that the compression element (11) is formed of individual lamellae or segments (41) arranged next to one another. Tool (3) according to claim 21, characterized in that on the lamellae or segments (41) groove-shaped recesses, for example in the form of a dovetail, and complementary elevations are arranged. Tool (3) according to claim 21, characterized in that the lamellae or segments (41) have recesses (43) into which guide elements can be inserted. Tool (3) according to one of the preceding claims, characterized in that the clamping element (10) between the support element (9) and the compression element (11) or the compression element (11) between the support element (9) and the clamping element (10) - viewed in the radial direction - is arranged. Tool (3) according to one of the preceding claims, characterized in that the inclined surfaces (12, 13, 18, 21) have an inclination against a normal in the axial direction whose absolute value is selected from a range with a lower limit of 2 ° and an upper limit of 30 °. Tool (3) according to any one of the preceding claims, characterized in that the compression element (11) has a height in the axial direction, which allows the simultaneous insertion of a plurality of sintered components. Pressing device (1) for compacting a sintered component or a powder for the sintered component, comprising at least one press element (2) for applying the compacting pressure and with a tool (3) for compacting the sintered component or the sintering powder into which the sintered component can be inserted or the powder can be filled is and which is arranged between an upper punch and a lower punch, characterized in that the tool (3) is designed according to one of the preceding claims. Pressing device (1) according to claim 27, characterized in that a plurality of tools (3) are arranged successively or one above the other. Pressing device (1) according to claim 27 or 28, characterized in that the lower punch has a Keilsteg which engages in a keyway (28) which is formed on a surface of the tool (3). Pressing device according to one of claims 27 to 29, characterized in that above and / or below the tool guide elements are arranged, in particular die plates. Method for compacting a powder into a sintered component in a tool (3), in particular according to one of claims 1 to 26, a pressing device (1), in particular according to one of claims 27 to 30, after which the powder is filled into the tool (3) and in this is pressed, characterized in that a tool (3) is used which comprises a clamping element (10) and a radially variable in terms of its dimensions compression member (11) having a contact surface for the powder, wherein the clamping element (10 ), the contour of the sintered component before or after the filling of the powder by spreading or widening or narrowing of the compression element (11 ) via the at least one first and the at least one second inclined surface (12, 13), by moving at least a part of the clamping element (10) and / or compression element (11) is fixed in the axial direction. Method for compacting a sintered component in a tool (3), in particular according to one of claims 1 to 26, a pressing device (1), in particular according to one of claims 27 to 30, after which the sintered component is inserted into the tool (3) and pressed therein, characterized in that a tool (3) is used which comprises a tensioning element (10) and a compression element (11) which is radially variable in dimension and has a contact surface for the sintered component, wherein the tensioning element (10) has at least one oblique first surface (12) and the compression element at least one complementary thereto have oblique second surface (13), and the contour of the sintered component before or after the insertion of the sintered component by spreading or widening or narrowing of the compression element (11) over the at least one first and the at least one second inclined surface (12, 13), by moving at least a part of the clamping element (10) and / or compression element (11) is fixed in the axial direction. Use of the tool (3) according to one of claims 1 to 26 for producing a sintered component with an outer toothing. Use of the tool (3) according to one of claims 1 to 26 for producing a sintered component with an internal toothing.

Images