EP2580010A1

EP2580010A1 - Compacting device

Info

Publication number: EP2580010A1
Application number: EP11740804.7A
Authority: EP
Inventors: Christian Dumanski; Robert Spitaler
Original assignee: Miba Sinter Austria GmbH
Current assignee: Miba Sinter Austria GmbH
Priority date: 2010-06-10
Filing date: 2011-06-09
Publication date: 2013-04-17
Anticipated expiration: 2031-06-09
Also published as: US20130129558A1; US9101980B2; BR112012031447A2; AT509588A4; WO2011153574A1; CN103079731B; CN103079731A; AT509588B1; EP2580010B1

Abstract

The invention relates to a tool for compacting the surface of a powder-metallurgically produced component (2), comprising a female die (1) and a male die (20), a clearance (5) which extends from a first female die opening (6) to a second female die opening (8) being arranged in the female die (1) and having a wall surface (10) for bearing against the component (2), and the male die (20) having a male die length (23) and a male die surface (21), wherein an inside diameter (12) of the clearance (5) in the female die (1) becomes smaller from the first female die opening (6) in the direction of the second female die opening (8) or an outside diameter (22) of the male die (20) becomes greater over the male die length (23), and wherein a compacting element (17) is arranged on the wall surface (10) of the female die (1) or on the male die surface (21). The compacting element (17) is formed with a thread-like profile.

Description

compacting tool

The invention relates to a tool for compacting the surface of a powder metallurgically produced component, with a die and a punch, wherein in the die a

Recess is arranged, which extends from a first die opening to a second die opening, and having a wall surface for abutment of the component, and the punch has a punch length and a punch surface, wherein a

Inner diameter of the recess of the die from the first die opening to the second die opening is smaller or an outer diameter of the punch over the punch length is larger, and wherein on the wall surface of the die or on the

Stamping surface is arranged a compacting element, a method for compacting the surface of a powder metallurgy produced component, comprising a tool having a die and a punch, wherein the component is moved through the die or the punch through a recess of the component and is compacted on the surface , As well as a powder metallurgical, manufactured component having a component body having at least one compressed side surface or at least one recess with at least one compressed wall surface. Sintered parts, ie workpieces made of pressed and sintered metal powder, have been around for a long time

Longer an alternative to cast or from the fully machined workpieces. However, due to the manufacturing process, in each case more or less pronounced porosity of the sintered parts has a negative effect on the flexural strength and the wear resistance, which limits, for example, the use of powder-metallurgically produced gears in high-load gearboxes.

In order to reduce the adverse effects of the porosity of sintered parts, it is known to effect surface densification on sintered blanks by re-pressing. A method using a die tool for this purpose is known from US Pat. No. 6,168,754 B1. In this method, a sintered blank, that is a pressed powder metal and then sintered part is compacted on its outer surface by this is pressed by a multi-stage die tool. The die tool comprises a plurality of die plates spaced apart from each other and axially spaced with die openings substantially correspond to the shape of the sintered blank, but the inner diameter decreases gradually and is smaller than the outer diameter of the sintered blank. In this

By pushing from the largest to the smallest die opening, the outer periphery of the sintered part is plastically and elastically deformed, whereby the surface is compacted and the sintered part receives its final dimension. The distances between the die plates allow the sintered part to expand by expanding a portion of the elastic deformations after each die plate. As a result of this sequence of die plates and intermediate spaces, the sintered part undergoes intermediate relief after each die plate, as a result of which a compressive residual stress remaining after deformation in the sintered part is built up in stages.

These compressive residual stresses increase the flexural strength in zones subjected to tensile stress and at the same time improve the wear resistance of the thus compacted surface.

However, a disadvantage of the method or die tool described in the US-Bl is that the die tool due to the between the die plates

running gaps has a lower stability and wear resistance, whereby the forming forces that can be borne by the die tool are clearly limited and the achievable surface compaction is still insufficient for certain applications. To avoid this disadvantage is from the originating from the Applicant WO

A method for surface compacting a sintered part is known in which a sintered part in a die tool along an axis in a pressing direction through a plurality of die sections from a first die section to a first die section

Matrizenöffnung is moved into a last die portion, wherein a wall surface of each die portion forms at least one pressing surface against which one of a

Outer surface of the sintered part formed contact surface is pressed, and one, in a cross-section with respect to the axis, defined by the pressing surface inner contour corresponds at least approximately to an outer contour defined by the contact surface. During the movement of the sintered part takes place from the first die opening in the last

Matrizenabschnitt the surface compression by continuously merging

Die sections and monotonically decreasing, measured between cooperating pressing surfaces inner diameter of the die sections. Far, this WO-A2 describes a tool for carrying out this method. The present invention is based on the object to provide an improved way to compact the surface of a powder metallurgy produced component.

This object is achieved independently by the aforementioned tool, the aforementioned method for compacting the surface of a powder metallurgy hergesteilen component and by the component itself, wherein the compression element of the tool is formed with a thread-like course, in the method, the compression of the surface in a tool according to the invention is carried out, wherein the component is moved with a linear movement along an axis through the die or the punch with a linear movement through the recess in the component to the thread-like arranged compression element (s) of the tool, and the component itself characterized Side surface or a wall surface with a

Has surface topography in waveform. The advantage here is that through the thread-like Ausformuhg of

Compression element relatively small compression levels can be achieved, whereby a material-friendly deformation is achieved, which is further supported by the impact of the component on the oblique Umformkante the compression element. Nevertheless, the tool itself is still relatively simple. In particular, the die can consist of a single part, as well as the stamp. By the thread-like

Compression element but also allows a relaxation of the compacted component areas outside the compression zones, whereby a burr formation on the component due to the compression can be significantly reduced. However, the burr formation can also be reduced by the force component acting in the circumferential direction of the component.

Surprisingly, it was found that after the process or with the

Tool-compacted components also show a reduction in noise in the application of the components, presumably due to the special surface topography created during and through compaction. Another advantage lies in the fact that in the free spaces between the compression areas, ie in the relaxation zones, used forming oil can deposit, causing the tearing of the

Lubricating film can be better prevented during the deformation. It can thus reduce the stress on the tool and the oil consumption. As a result, the movement also has a longer service life. Preferably, a plurality of helical are distributed over the respective surfaces

Compression elements are arranged. It is thus not only a better or higher compression of the component achieved, but can thus be achieved in particular that a multi-point support is provided for the component in the tool so that tilting of the component during compression can be better avoided. In particular, it is advantageous if the plurality of compression elements are each offset by an equal angle value to each other, whereby these effects are enhanced.

To further improve the compression, it can be provided that the one or more thread-like compression element (s) has or have a thread pitch that varies over the length of the or the compression element (s). It is thus achieved that areas are created over the length of the compression section of the tool, which have a different compression effect on the component surface, ie areas with greater compression effect and areas the larger

Relaxation effect on the component can be formed.

The one or more compression element (s) may have a chamfer or a rounding, in order to avoid at least a high degree of wear on the tool at least as far as possible, or on the other hand, a "gentler" transition of the component of the

To allow compression areas in the relaxation areas and vice versa, without that by a Schafkantige step inadvertent material removal takes place on the component or that break the edges at the transitions of the tool.

The inner diameter of the recess in the die can decrease linearly or the outside diameter of the punch increases linearly in the pressing direction. It is thus simplifies the production of the tool. In addition, it may also be possible

Due to production fluctuating raw diameters of sintered components are better compensated. In order to better adapt the tool to different sintered alloys, it has been shown in practice that sintered components, depending on the composition, also allow different degrees of deformation in one compacting step, or it is better for the successive compacting steps in the tool to be different Forming degrees is carried out - to allow the inner diameter of the

Remove recess in the die progressively or degressively, or increase the outer diameter of the punch in the pressing direction progressively or degressively.

The end portion of the recess in the die or the punch may be cylindrical, which end portion may also be free of compression elements in order to achieve the straightening of the component.

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

In each case in a schematically simplified representation: FIG. 1 a die in a side view, cutaway top view; Fig. 2, the die of Figure 1 in plan view. 3 shows a stamp in side view;

4 shows different profile cross sections of compression elements;

5 shows a detail of a variant of the die cut in side view;

FIG. 6 shows a section of a further variant of the die in side view; FIG.

7 is a diagram of the surface roughness of a compacted with the inventive tool sintered component.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are given the same reference numerals or the same component designations, the disclosures contained throughout the description being applied mutatis mutandis to the same. che parts with the same reference numerals or the same component names can be transferred. 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 may represent separate solutions according to the invention.

1 and 2 show a longitudinal section through and a plan view of a die 1 for a tool for surface compaction of a component 2 by moving it along an axis 3 through the die 1. This comprises a Matrizengrundkörper 4, which has a recess 5, the extends from a first die opening 6 on a first die surface 7 to a second die opening 8 opposite the first die opening along the axis 3 on a second die surface 9 continuously through the die body 4 and whose cross section is adapted to the cross section of the component 2 to be compacted , The recess 5 has a wall surface 10 for abutment of a component surface 11 of the component 2. Furthermore, the recess has an inner diameter 12 which, beginning at the first die opening 6, becomes smaller in the direction of the second die opening 8, as a result of which the recess 5 tapers along at least part of a pressing length 13 of the die 1 along the axis 3.

The component 2 consists of pressed and then sintered metal powder, so it is made by powder metallurgy, the methods and materials for producing such a sintered blank from the prior art are well known and therefore not explained in detail.

The component 2 is designed disc-shaped in the illustrated embodiment and has on the component surface 11 a diameter 14, which corresponds to the surface densification of a raw diameter 15 and after the surface compression to a smaller end diameter 16.

On the wall surface 10 and projecting over this at least one compression element 17 is arranged. The compression element 17 has a thread-like shape, thus extending from the region of the first die opening 6 to the region of the second die opening 8 in the form of a helical or spiral, therefore, can also be referred to as Umformspirale. It is thus generated with the compression element 17, an oblique Umformkante to compaction. Due to the gradient of the compression element 17, that is to say the forming spiral, a "traveling forming point" or "a traveling forming edge" results along the component circumference.

By "from the area" and "to the area" is meant that it is possible within the scope of the invention that the compression element 17 need not necessarily be arranged beginning at the first die opening 6, but that an inlet region in the die 1 at the may be formed first die opening in which no compression element 17 is arranged to facilitate the insertion of the component 2 into the die. On the other hand, an end portion 18 of the recess 5 of the die 1 may also be free of the compression element 17 or compression elements 17. For example, this end portion may have an inner cross section that corresponds to the outer contour of the finished compacted component 2, that is, for example, have a cylindrical cross-section, so as to allow the same in a final step of the compression of the surface of the component 2. Of course, however, there is the possibility that the compression element 17 extends on the wall surface 10 starting from the first die surface 7 to the second die surface 9.

The compression element 17 preferably extends continuously without interruption in the recess 5, but it is possible that this compression element 17 is divided into individual, slightly spaced compression member sections. As can be seen in Fig. 2 in dashed and dash-dotted lines, there is

Under the invention, the possibility that a plurality of compression element 12 are arranged on the wall surface 10, so for example two, preferably three (as shown), or four, five, six, etc. The compression elements 17 are preferably in the form of a multi-thread, ie For example, three-thread, arranged, the resulting "compaction passages" are in particular offset by a respective same angular value to each other, resulting by dividing 360 ° by the number of thread-like compression elements 17, so for example by 120 ⁰ in the arrangement of three Compression elements 17. Preferably, the or the compression element (s) 17 are worked out of the wall surface 10 of the recess 5, that is integrally formed with the die 1.

The surface compression of the component 2 takes place by being introduced into the recess 5 through the first die opening 6 and subsequently moved as far as and through the second die opening 8, the component surface 11 of the component 2 being pressed against the compacting element or elements. 17 of the die 1 is pressed. Alternatively, the direction of movement of the component 2 can also be reversed so that therefore the component 2 is not removed from the die 1 via the second die opening 8 but the first die opening 6.

The pressing effect is achieved in that the inner diameter 12, which is defined by the clear width between opposite or cooperating portions of the wall surface 10 of the recess 5, wherein the or the compression element (s) 17 is seen as part of the wall surface 10 and The term inner diameter 12 is not to be understood as limited to circular cross sections, but also as a clear width between interacting press surface parts, which need not necessarily go through the axis 3 of the die 1. Thus, other than circular cross sections of the component 2 can be compressed. Similarly, the diameter 14 on the component 2 is not limited to radial directions. In the region of the introduction of the component 2 into the recess, however, the recess 5 preferably has an inner diameter 14 which is at least not smaller than the raw diameter 15 of the component in order to simplify the insertion of the component 2. The movement of the sintered part 2 in the die tool 1 preferably takes place in a straight line along the axis 3 in a pressing direction 19 from the first die opening 6 to the second die opening 8, followed by the removal of the component 2 from the die 1, via the second die opening 8 or after Direction of movement reversal against the pressing direction 19 through the first die opening 6, for which purpose an ejector element can be arranged in the second die opening.

The rectilinear movement in the direction of the axis 3 can also be superimposed by a rotational movement, whereby the component 2 in the die 1 performs a screwing movement. Through this Movement shape can be compressed with the die 1 and components 2 on its surface, the component surface 11 also includes screw surfaces. In this case, the movement of the component 2 takes place about a screw axis which coincides or is parallel to the axis 3, for example if the screw surface to be compacted on the component surface 11 is not arranged on the entire circumference of the component 2 and this is not rotationally symmetrical Basic body has. In the case of superposition of the rectilinear motion, however, attention must be paid to the pitch of the screwing movement, which must be different from the pitch of the thread-like compression element 17 in order to achieve surface compression, ie to prevent the component 2 in the compression passage of the compacting element 17 slides off.

The direction of movement of the component 2 in the die 1 can, as well as the speed of movement for optimizing the surface compression, have an arbitrary course, and e.g. Also include a reversal of movement, stoppage of movement, very slow but also very fast movements. It is possible that the compression is carried out with at least two relative reversals of movement of the component 2 to the die 1, so the component 2 is moved, for example, down through the die 1, in the die 1, the component again a short distance against the original direction of movement is moved back and then moved within the die 1 after a new reversal of motion back in the original direction through the die 1.

Of course, this process can be repeated several times or the die 1 can be moved instead of and / or in addition to the component 2. Due to the pressure acting between the compression element 17 and the component surface 11, compressive stresses are generated. By the movement of the component 2, the component surface 11 additionally experiences a sliding friction stress in the axial direction with rectilinear motion or in the axial and tangential direction with one screwing. These stresses acting on the component surface 1 1 in the component 2 cause both an elastic and a plastic deformation of the component 2, wherein the plastic portion causes the permanent surface compression. In this surface compaction, the powder metal particles joined together by pressing and subsequent sintering on so-called bridges are strongly pressed against each other and plastically deformed. The existing between the powder metal particles after sintering pore-like cavities are thereby reduced in volume and increases the material density in this area. The statements regarding the movement sequence also apply to the stamp.

The effect of surface compaction is greatest due to the additional sliding frictional stresses directly on the component surface 11 and decreases in the direction of the interior of the component 2. By means of the method, it is typically possible to compact edge layers of components 2 having a thickness of a few hundredths of a millimeter up to several tenths of a millimeter and above. After this surface compaction remain in the component 2 in its boundary layers compressive stresses that cause a beneficial increase in flexural strength and an increase in wear resistance.

Since the component 2 repeatedly strikes regions of the recess 5 along its path through the die in the pressing direction 19 after slipping over the compacting element or elements 17, which due to the "threads" of the or the compacting element (FIG. e) 17 have larger inner diameter 12 - compared to the or the Verdicht- tion element (s) 17 - the component 2 is after a partial compression also allows partial relaxation, wherein the material of the component 2 springs back, so it is a component The compacting element 17 is limited to a small surface area or a point deformation, as a result of which the thread-like compaction element 17 also restricts the necessary forming forces , As a result of the "displacement" of the compacting element (s) 17, at least one region is always in the "compression" or "decompression" step at the diameter 14 of the component 2 during the entire compaction process In the core of the component 2, ie in the basic structure of the component 2, a sharp, ie erratic, transition between the at least approximately full-density surface area and the basic structure can be formed Relative movement between the component 2 and the die 1 can be effected by movement of the component 2 and / or by movement of the die 1, wherein the component 2 and the die 1 can each be connected to a suitable drive or a fixed frame or the component 2 with help - ii - a punch or an upper punch and a lower punch is moved through the die 1, as is known per se.

As already mentioned, there is the possibility that the compression element 17 is not designed to extend over the entire inner circumference of the recess 5, but that a predeterminable portion of the wall surface 10 of the recess 5 in the direction of the axis 3 is free of compression elements 17. It is thus possible to produce components 2, after the movement of the component 2 during compression preferably takes place in the direction of the axis, which are surface-compacted only in a partial region. But it is also possible to produce components 2, which have a different degree of surface compression in different areas by the compression element 17 is formed over a portion of the pressing length 13 of the die 1 extending continuously over the circumference of the recess 5 or at least one further thread-like compression element 17 is arranged only in a partial region of the circumference of the recess 5 over the pressing length 13. In addition, there is the possibility that 17 have a different overall length at several compression elements.

A compacting member 17 may have a pitch selected from a range of 0.5 mm to 150 mm, more preferably selected from a range of 5 mm to 100 mm, or selected from a range of 20 mm to 50 mm. In this case, it is also possible that, in the arrangement of a plurality of compression elements 17, at least two have a different pitch angle to one another over at least a partial area of the entire length of a compression element 17. In addition, a compression element 17 can be formed over its entire length with at least two different pitch angles, ie, for example, the pitch angle in the area of the first die opening 6 can be greater than in the area of the second die opening 8, so that in other words the "threads" or Compressing passages closer together over the length of the compression element 17. Such a design of a compression element 17 can also be used in the arrangement of several compression elements 17.

The compression element (s) 17 may be in the form of a "left-hand thread" or a "right-hand thread". Fig. 3 shows a punch 20 for compressing the surface of a recess in a component 2 (not shown), for example a gear. For this purpose, the punch 20 on an outer punch surface 21 on this protruding at least one of the above-described thread-like compression elements 17, with respect to the comments on the or the compression element (s) 17 to avoid repetition of the above statements to refer.

In order to allow a stepwise densification of the surface, an outer diameter 22 over a punch length 23, i. a length of the mandrel which dips into the recess of the component during the execution of the compression, is greater, as can be seen from FIG. An end portion 24 of this mandrel can be carried out again without compression elements 17 in order to achieve the straightening of the surface-compressed component 2. For this purpose, this end section preferably has a cross-section which corresponds to the cross-section of the finished compacted component 2, that is to say has a cylindrical shape, for example.

Both in the die 1 and the punch 20, there is the possibility that one end portion in terms of its clearance and the outer diameter 22 is larger or smaller than the corresponding dimension in the finished component 2, by the proportion of elastic (return ) suspension of the component 2 after the compression step. It is thus on the die 1 and the punch 20 allows a support function during the (return) springs.

Within the scope of the invention, it is also possible for the die 1 according to the invention to be used in combination with the stamp 20 according to the invention for the surface compression of a component 2 in order to compact both the inner component surface and the outer component surface 11 To reach work step.

The compression element (s) 17 may or may have different profile cross sections 25 to 33, for example a pointed profile, such as a pointed profile cross section 25, a rounded profile cross section 26, as shown by way of example in FIG conically over-turned profile cross-section 27, a saw profile, such as a pole side flat profile section 28 or equatorseitig flat profile section 29, a flat profile, such as a conically flattened profile section 30 or a rounded profile section 31, one, in particular from these profile sections 25 to 31, combinable Neten profile cross section 32 or a round profile cross section 33. The or the Verdichtungseiementie) 17 may or may also be provided with the chamfer.

Furthermore, a flank 34 facing the component 2 when it is moved against the compacting element 17 can enclose a different angle with the wall surface 10 than an edge 35 facing away from the component in the direction of movement. For example, the facing flank 34 can be made steeper than the flank 34 facing flank 35, in order to simplify the "driving over" of the compression element 17 with the component 2 and thus to allow a tool sparing compaction.

However, it can also be provided that the profile cross-section of the compression element 17 changes over its entire length, e.g. in the area of the first die opening 6 steeper, i. With a slight angle of inclination of the flanks 33, 34 inclined profile cross sections are formed against the wall surface 10, ie in areas with even less surface compression of the component 2, and in the region of the second die opening 8 flatter profile cross sections, i. with a larger inclination angle of the flanks 33, 34 inclined to the wall surface 10.

A transition region 36 between the wall surface 10 of the recess 5 of the die 1 and the punch surface 21 of the punch 20 and the compression belt or belts 17 can be rounded, as can be seen in FIGS. 5 and 6, the cutouts from embodiments of the die 1 in cross section.

In the simplest case, the cross section of the recess 5 tapers conically from the first die opening 6 in the direction of the second die opening 8. However, it is also possible that, as can be seen from FIGS. 5 and 6, the wall surface 10 of the recess 5 the die 1 are formed between the protrusions formed by a compression element 17 with a convex or concave curvature, wherein also mixed forms with convexly curved portions and concave curved portions in a recess 5 are possible. In addition, besides the conical taper, it is also possible for the inner diameter 12 (FIG. 2) of the recess to decrease progressively or degressively or with a combination thereof. Of course, the remarks in this paragraph also apply to the punch 20, ie the punch surface 21. As already mentioned above, the use of the die 1 and / or the stamp 20 for surface compacting produces a component 1 whose outer component surface 11 and / or inner surface of a recess at least partially exhibits a wave shape. 7 shows an example of a course of the roughness depth on a completely compressed component 2 (FIG. 1). The surface roughness in μπι and on the abscissa are the component height (in the pressing direction 19, as shown in Fig.l) plotted in μπι on the ordinate.

The embodiments show possible embodiments of the die 1, the punch 20 and the component 2, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual embodiments are possible with each other and this Variability due to the teaching of technical action by objective invention in the skill of those working in this technical field is the expert. For the sake of order, it should finally be pointed out that in order to better understand the structure of the die 1, the punch 20 and the component 2, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size.

REFERENCE NUMBERS

1 die

2 component

3 axis

4 Matrizengrundkörper

5 recess

6 die opening

7 die surface

8 die opening

9 die surface

10 wall surface

11 component surface

12 inner diameter

13 press length

14 diameter

15 raw diameter

16 final diameter

17 compaction element

18 end section

19 pressing direction

20 stamps

21 stamp surface

22 outer diameter

23 stamp length

24 end section

25 profile cross section

26 profile cross section

27 profile cross-section

28 profile cross section

29 profile cross section

30 profile cross section

31 profile cross section

32 profile cross section

33 profile cross section

34 flank

35 flank

36 transition area

Claims

Patent claims

1. A tool for compacting the surface of a powder-metallurgically produced component (2), with a die (1) and a punch (20), wherein in the die (1) a recess (5) is arranged extending from a first die opening (5). 6) to a second die opening (8), and having a wall surface (10) for abutment of the component (2), and the punch (20) has a punch length (23) and a punch surface (21), wherein an inner diameter (12) of the recess (5) of the die (1) from the first die opening (6) in the direction of the second die opening (8) is smaller or an outer diameter (22) of the punch (20) over the punch length (23) is greater , and wherein on the wall surface (10) of the die (1) or on the stamp surface (21) a compression element (17) is arranged, characterized in that the compression element (17) is formed with a thread-like course.

2. Tool according to claim 1, characterized in that a plurality of thread-like compression elements (17) are arranged.

3. Tool according to claim 2, characterized in that the plurality of compression elements (17) are each offset by an equal angle value to each other.

4. Tool according to one of claims 1 to 3, characterized in that the or the thread-like (s) compaction element (s) (17) has or have a thread pitch extending over the length of the or the compression element (s) (17) changed.

5. Tool according to one of claims 1 to 4, characterized in that the or the compression element (s) (17) has or have a chamfer or a rounding.

6. Tool according to one of claims 1 to 5, characterized in that the

Inner diameter (12) of the recess (5) decreases linearly in the die (1) or the outer ßendurchmesser (22) of the punch (20) in the pressing direction (19) increases linearly.

7. Tool according to one of claims 1 to 6, characterized in that the

Inner diameter (12) of the recess (5) in the die (1) progressive or degressive off takes or the outer diameter (22) of the punch (20) in the pressing direction (19) increases progressively or degressively.

8. Tool according to one of claims 1 to 7, characterized in that an end portion (18 or 24) of the recess (5) in the die (1) or the punch (20) is cylindrical.

9. A method for compacting the surface of a powder metallurgy produced component (2), comprising a tool having a die (1) and a punch (20), wherein the component (2) by the die (1) or the punch (20 ) is moved through a recess of the component (2), and thereby the component (2) is superficially compacted, characterized in that the compaction of the surface is carried out in a tool according to one of claims 1 to 8, wherein the component (2) with a linear movement along an axis (3) through the die (1) or the punch (20) with a linear movement through the recess in the component (2) to the thread-like arranged compression element (s) (17) of the tool moves past becomes.

10. Powder metallurgical, in particular using a tool according to one of claims 1 to 8, manufactured component (2) having a component body having at least one compacted surface or at least one recess with at least one compressed wall surface, characterized in that the surface or the Wall surface has a surface topography in waveform.