EP2915609B1 - Method and device for manufacturing a cup-shaped sheet metal piece with inner and outer teeth by means of a forming head - Google Patents

Description

The invention relates to a method and an apparatus for producing an internally and externally toothed cup-shaped sheet metal part according to the preamble of claim 1 and of claim 7 and is based on a prior art, as he WO 2009/124534 A2 and the EP 2 460 599 B1 has become known.

The invention essentially uses a generic device and a generic method, as shown in the two aforementioned publications. For this reason, because of the basic functions of the present invention and the device structure, reference may be made to the disclosure of the two aforementioned publications. Disadvantage of the method and the device according to the WO 2009/124534 A2 is that the movable forming head, are arranged in the circular spaced-apart circumferentially distributed cassettes for receiving profile rollers, a relatively large space requirement. The core of this document is that the forming head rests from the outside on the sheet metal part to be formed and that consequently also the cassettes in which the profile rollers are arranged to create from the outside to be formed sheet metal part and deform this directed radially inward. It is mounted as an alternating internal and external teeth on the sheet metal part, but the deformation is done by the outside of the sheet metal part by attaching profile rollers.

Such a device and such a method have proven themselves on a large scale. The disadvantage, however, is that sheet metal parts which have an outwardly directed flange, can not be provided with a toothing. After the known tool with the vertically movable forming head attaches from the outside to the sheet metal part, an outwardly directed flange on the sheet metal part would not make a transformation possible.

Another disadvantage of the known device is that the forming head requires a lot of space. For this reason, an external roller receptacle must be arranged on the cassettes, which receives the pressure of the profile rollers on the cassettes, which is directed radially outward. Such a pressure receiving part or such a receiving ring is relatively difficult to manufacture and must be made relatively stable, and requires appropriate slot.

Another disadvantage is that the known device is limited to profile rolls as Umformkörper.

The invention is therefore the object of developing a method and apparatus for producing an internally and externally toothed cup-shaped sheet metal part so that with less space and lower production costs of the forming and sheet metal parts can be transformed with an outwardly directed flange.

To achieve the object, a method according to the features of claim 1 is provided. A device according to the invention for carrying out the method is described in claim 7.

In the given technical teaching, there is the significant advantage that now instead of a deformation pressure and a deformation direction from outside to inside, the invention proposes to make a similar deformation directed from the inside to the outside on the sheet metal part. This means that the forming head enters from above into the upper open receptacle of the sheet metal part and the sheet metal part directed from the inside out radially outwards with the alternating inner and outer teeth on the circumference.

If the forming head according to the invention works with profile rollers, it will be referred to below as a roller head. However, this designation is also retained if, instead of the profile rolls, other forming bodies are used, e.g. the alternative pressure and Ziehumformwerkzeugkörper mentioned below.

The term "profile roll" used in the description of the invention is therefore not intended to be limiting. It can be used all Umformkörper or drawing or pressure body, such. Plungers that work in the manner of a spinning tool or achslose rollers, balls, cylinders, pins and the like.

Especially with the use of axially recorded in the respective cassette balls (mini roll roller body), there is the advantage that even more, such balls (mini roll rollers) can be accommodated in a cassette. You can be arranged axially aligned in the forming direction one above the other or axially offset from one another in the cassette in the forming direction.

However, they can also be stored lying side by side in the same plane or next to each other in different levels in a cassette achless.

With the given technical teaching, there is now the significant advantage that the forming head must be at least as large in its outer circumference as the inner circumference of the sheet metal part to be formed. This results in the need to produce a relatively small building forming head, which in turn has the advantage that the actual power of the cassettes can now be provided in the center of the forming and there a stop bushing can be arranged with a relatively small circumference, covering the entire , inward forming pressure acting on the cassettes adopts.

Instead of a arranged on the outer circumference stop ring, as in the WO 2009/12 45 34 A2 , which must accommodate the outward forming pressure of the cassettes with a large diameter, instead of in the present invention, a stop sleeve located in the center of the forming head is provided, which can be made much simpler, cheaper and more space-saving for this reason.

The invention therefore provides, in principle, for a forming head to extend into a clamped, cup-shaped sheet-metal part, and because of the forming bodies, preferably profile rolls, rolling along the wall of the sheet-metal part along the inner circumference, alternating internal and external toothing occurs because the sheet metal part is surrounded on its outer periphery by an associated, provided with a complementary toothing die.

The annular die thus acts with its teeth as a support body for mounting the teeth in the sheet metal part. While the Umformkörper work directed from the inside out, puts on the outside of the sheet metal part, the die with its complementary teeth.

The invention is not limited to a forming head on which the cassettes are arranged with outwardly directed forming bodies (preferably profile rollers) and which moves into the interior of the sheet metal part to be formed.

In a further development of the invention, it is provided that a combination of the deformation after WO 2009/12 45 34 A2 and the present invention is proposed as a novel roll or forming head.

Such a combined roller or forming head consists of a ring of external cassettes, the forming bodies (preferably profile rollers) are directed radially inwardly on the outer periphery of the sheet metal part to be formed, and further comprising a combined further roll or forming head according to the present invention, which is equipped with a number of uniformly distributed on the circumference arranged cassettes whose forming bodies (preferably profile rollers) act from the inside to the outside.

With the invention, it is therefore possible for the first time to transform sheet metal parts having a stop or parts which protrude beyond the inner circumference of the sheet metal part with a rolling or forming head acting from the inside outwards.

In the prior art, it was always necessary for sheet metal parts in which a collar or lugs of enlarged diameter was formed, subsequently form the collar on the sheet metal part, after the alternating internal and external teeth was attached.

This is no longer necessary according to the present invention, because the collar can be formed on the undeformed, cup-shaped sheet metal part, and with this outwardly directed collar can then be transformed into an internally and externally toothed cup-shaped sheet metal part non-deformed sheet metal part.

Thus, the quality of the component is significantly improved, because a subsequent attachment of a collar by a separate forming process can be omitted. In such a previous forming process, the accuracy of the subsequent gearing can be affected.

In a further development of the present invention, it is also provided that a wiper which is movable separately from the forming head (preferably roller head) is arranged on the upper tool of the device. This scraper ensures the ejection of the sheet metal part after the forming process.

In the following description of the drawing a non-adjustable set of forming bodies (roller set) is described, which is characterized in that the forming bodies (profile rollers) receiving cassettes abut straight cylindrical guide surfaces on the inner stop sleeve and therefore not radially during the deformation process are adjustable.

The invention is not limited to cassettes, which are arranged only in one plane on the forming head (roller head), a combination of several superposed cassettes is possible to perform the transformations of the invention.

Such combinations of multiple cassette rings are used to provide different processing steps, such as e.g. a post-processing of the applied teeth with another set of profile rollers to realize.

In an alternative embodiment to the aforementioned embodiment, a radial adjustment of the forming body (profile rollers) takes place in the direction of the workpiece to be formed in such a way that, for example, on the tool-side stop sleeve supporting back plates of all sitting on the ring cassettes with a thickness X1 by respectively a back plate are exchanged with a different thickness X2 and thus the cassettes overall more radially outwardly protrude as compared with thinner back plates, which ensure that the cassettes with a smaller amount radially from the forming head (roller head) stand out.

Accordingly, the depth of the deformation of the toothing can be adjusted by replacing the respective back plate on the respective cassette.

In a third embodiment of the invention, it is provided that the back plates of the cassettes not on cylindrical and parallel to Moving direction of the forming head (roller head) aligned guide surfaces bear against the tool-side stop bushing, but that the guide surfaces are aligned at a conical angle in the direction of the working direction of the forming head (roller head).

In this embodiment, it is possible to make a radial adjustment of the cassettes during the downward stroke by the cassettes are moved on their conically tapered back plates on the conically tapered guide surfaces of the stop sleeve with a suitable, axially displaceable driven pressure ring and thus a steady or also gradual adjustment of the radial deformation depth of the cassette is given during the forming process.

In a third embodiment, it may also be provided that the cassettes are not aligned in the radial direction exactly from the inside to the outside and therefore also work the profile rollers on a radius beam, but that they are installed by a deviating from the radius beam angular position in the cassette or Cassette sits in a different angle beam on the stop sleeve, as for example in the DE 10 2010 053 547 A1 is described.

The invention thus provides a device and a method in which it is provided in a development that the profile rollers or forming bodies do not work on a radius beam, but offset to the radius beam in an angular position.

A movable adjustment with a pressure ring, wherein there is a steady change in the roll depth of the profile rollers or the penetration depth of the Umformkörper is indeed in the WO 2009/12 45 34 A2 in the local FIG. 5 described, however, this drive principle is not implementable to an acting from the inside out roller or forming head.

This is where the invention, which transmits such adjustment to a roller or forming head, in which the cassettes from radially inward to radially outward acting on the sheet metal part resting against the outer circumference.

The invention thus also claims the combination of a known roller head according to the WO 2009/12 45 34 A2 with a roll or forming head, as he said on the basis of FIGS. 1 to 9 of the present invention will be described later.

With a further embodiment of the invention, it is provided to provide a double-walled, cup-shaped sheet metal part both on the inner and on the outer wall optionally with a different or the same toothing.

For this purpose, in a first processing step, a die or another ring-shaped holder is inserted between the inner and the outer wall of the sheet metal part, wherein the die has a complementary in comparison to the rolled-up of the profile rollers teeth complementary teeth.

Such toothing of the die can optionally act only on the radially outer periphery of the sheet metal part or act only on the radially inner periphery of the sheet metal part or on both peripheries of the sheet metal part with different or the same tooth shapes.

With such an embodiment, it is therefore possible for the first time to produce a double-walled sheet-metal part whose inner toothing deviates from the outer toothing.

In the following, the invention will be explained in more detail with reference to drawings illustrating several execution paths. Here are the drawings and their description further preferred features and advantages of the invention.

• Figur 1: Schnitt durch eine Umformvorrichtung im geöffneten Zustand
• Figur 2: Schnitt durch die Umformvorrichtung nach Figur 1 in der Kontaktstellung
• Figur 3: Schnitt durch die Umformvorrichtung nach Figuren 1 und 2 in der geschlossenen Stellung
• Figur 4: eine vergrößerte Darstellung des Rollenkopfes im Schnitt
• Figur 5: einen Schnitt durch eine Kassette
• Figur 6: ein Einbaubeispiel für eine Kassette nach Figur 5
• Figur 7: perspektivische Darstellung des Rollenkopfes mit teilweise dargestellten Kassetten
• Figur 8: perspektivische Darstellung einer Kassette mit einer eingebauten Profilrolle
• Figur 9: die Kassette nach Figur 8, wobei die Verschlussplatte entfernt wurde
• Figur 10a: eine perspektivische Darstellung eines doppelt-verzahnten Werkstücks
• Figur 10b: ein Schnitt durch das Werkstück nach Figur 10a
• Figur 10c: eine perspektivische Unteransicht des Werkstücks nach Fig. 10 a
• Figur 11: Schnittdarstellung der Herstellung eines einwandigen und doppelt-verzahnten Werkstücks
• Figur 12: Schnittdarstellung der Herstellung eines doppelwandigen und doppelt verzahnten Werkstücks
• Figur 13. Schnittdarstellung einer alternativen Umformvorrichtung mit einem zweistufigen Umformwerkzeug

Show it:

• FIG. 1 : Section through a forming device in the open state
• FIG. 2 : Cut through the forming device after FIG. 1 in the contact position
• FIG. 3 : Cut through the forming device after FIGS. 1 and 2 in the closed position
• FIG. 4 : an enlarged view of the roller head in section
• FIG. 5 : a section through a cassette
• FIG. 6 : an installation example for a cassette after FIG. 5
• FIG. 7 : perspective view of the roller head with partially shown cassettes
• FIG. 8 : Perspective view of a cassette with a built-in profile roller
• FIG. 9 : the cassette after FIG. 8 with the closure plate removed
• FIG. 10a : A perspective view of a double-toothed workpiece
• FIG. 10b : a section through the workpiece after FIG. 10a
• FIG. 10c a perspective bottom view of the workpiece after Fig. 10 a
• FIG. 11 : Sectional view of the production of a single-walled and double-toothed workpiece
• FIG. 12 : Sectional view of the production of a double-walled and double-toothed workpiece
• FIG. 13 , Sectional view of an alternative forming device with a two-stage forming tool

The forming device according to the FIGS. 1 to 3 consists essentially of an upper tool 1 and a lower tool 2 arranged thereunder.

On the upper tool 1, a number of downwardly directed guide columns 3 are present, which dip when lowering the upper tool 1 in the direction of arrow 27 against the lower tool 2 in the guide receptacles 4.

In this way, the upper tool 1 is centered to the lower tool 2.

On the lower tool 2, a recess 44 is arranged in a clamping plate, in which further retaining plates a counter-holder piston 7 movable is arranged. The drive of the counter-holder piston is not shown in detail. This dips through an annular space 24, which is arranged centrally in the interior of a ring holder 10.

On the ring holder 10, a die 5 with an associated, inwardly facing toothing 6 is arranged. On the die 5, the still undeformed sheet metal part 9 sits on, with an inner centering on the mold plate 8 takes place. There is a gap between the outer periphery of the die plate 8 and the inner periphery of the die 5 provided with the toothing 6.

In the exemplary embodiment shown, the sheet-metal part 9 has a flange 43 which is equipped with a larger circumference and directed outwards. An attachment of a toothing by a forming head (roller head 23), as described in the prior art, would therefore not be possible.

For this reason, the invention provides that a forming head 23 is provided with from inside to outside reshaping bodies (profile rollers 22).

To FIG. 1 the forming head 23 consists of a rotationally symmetric holder 11 which is fixed in the upper tool 1 and which is penetrated by a stripping tool. The stripping tool consists of a scraper 14, which is provided with a lower annular plate 13.

In the holder 11 are in two superposed working positions 36, 37 (see FIG. 4 ) arranged two sets of forming bodies in the training as profile rollers 22 which are rotatably and axially held in associated cassettes 17, 18.

There are two superimposed stop bushes 21, which are connected together by a central fastening screw 19, so that this fastening screw 19, the entire package with the stop sleeves 21 and in two working positions 36, 37 above and in the mutual spaced apart cartridges 17, 18 holds together.

The lower ring of cassettes 18 is held and guided by a lower dividing plate 20, while the upper ring of cassettes 17 is held and guided by an upper dividing plate 35.

In the in FIG. 1 shown functional position, the open position of the upper tool compared to the lower tool 2 is shown.

In FIG. 2 are the same parts with the same reference numbers as in FIG. 1 Mistake. It is the so-called contact position recognizable. The contact position is characterized in that now the forming head (roller head 23) touches the top of the sheet metal part 9 and the profile rollers 22 of the lower ring of cassettes 18 now begin to immerse in the inner periphery of the sheet metal part 9.

On the FIG. 2 the next step is done FIG. 3 , where it can be seen that both the profile rollers 22 of the upper cassettes 17 and the profile rollers 22 of the lower cassettes 18 are now fully immersed through the sheet metal part 9 and the profile rollers 22 of the lower cassettes 18 have already emerged from the sheet metal part 9 to be reshaped , This means that the roller head 23 is now immersed in the central annulus 24 of the ring holder 10.

In this step, the scraper 14 would now sit with its ring plate 13 on the formed and provided with the inner and outer teeth sheet metal part 9, this hold back while the upper tool 1 moves back up.

The removal of the thus formed sheet metal part then takes place according to FIG. 1 by the counter-piston 7, which upwards in the opposite direction to Arrow direction 27 moves and the sheet metal part 9 moves upwards, wherein FIG. 1 already moved out of the die 5 position shows.

FIG. 4 shows an enlarged view of the structure of the roller head, wherein still in conjunction with FIG. 1 It should be noted that the roller head 23 ansitzt the holder 11 and the holder is in turn received in a holding plate 12 (see FIG. 1 ). In the region of the holding plate 12 with an overlying base plate 47 a central recess is provided, in which a cross member 15 is arranged, which is driven by a pressure pin 16 and which drives the wiper 14 with its annular plate 13 slidably.

In FIG. 4 Therefore, only the holder 11 is shown, while the remaining parts above the holder based on the FIG. 1 have been described.

There are two different working positions 36, 37 are present, which occupy a mutual distance 38 from each other, wherein on each working position 36, 37 a ring of evenly distributed around the circumference arranged cassettes 17, 18 is provided.

The number of cassettes 17, 18, which are distributed uniformly on the respective circumference of the working position 36 and 37, depends on the fineness and the pitch of the desired toothing in the sheet metal part 9.

In any case, it is important that each ring of cassettes 17, 18 is formed by an inner stop bushing 21, against which the respective rear plates of the cassettes 17, 18 rest against the inner and outward-directed circumference thereof. In this way, the forming pressure, which acts from the profile rollers 22 on the cassettes 17, 18, transmitted via the cassette housing on the back plate and from there to the outer periphery of the respective stop sleeve 21.

For this reason, the stop bushes 21 can be installed to save space and take on the entire forming load, resulting in the small-sized circumference of the roller head 23.

The entire package of the lower partition plate 20, the intermediate stop sleeve 21, the upper partition plate 35 and the upper stop sleeve 21 is held together by the central fastening screw 19.

In FIG. 5 a first embodiment of a cassette 17, 18 for the roller head 23 is shown. The cassette is still based on the FIGS. 8 and 9 shown in perspective.

It consists essentially of a back plate 25, which is provided in the illustrated embodiment with a constant thickness 45, which extends over the entire height of the cassette 17, 18.

The back plate 25 is screwed by means of fastening screws 28 with the housing 29 of the cassette.

The front side of the cassette is formed by a closure plate 34, in which a front recess is present, through which the profile of the axle roller 22 rotatably mounted in the interior of the cassette rotatably mounted.

Accordingly, in the interior of the cassette 17, 18, a bearing surface 30 is present, which surrounds the outer periphery of the profile roller 22 and receives positively. It can be provided not shown in detail lubrication or other bearings.

Likewise, it may be provided that the profile roller 22 is not axially held in the bearing surface of the recess in the interior of the cassette 17, 18 is, but that in this area the profile roller 22 is rotatably mounted with an axis in the cassette. It is at least in the two directions of arrow 32 rotatably in the receptacle, and thus on the bearing surface 30, stored.

In a third embodiment of the invention, it may be provided that instead of a profiled profile roller (an example of a profile is in FIGS. 8 and 9 shown), a non-profiled profile roller is provided. In a third embodiment, it can be provided that, instead of the profile roller, an axially mounted ball or a rolling element (for example, a cylindrical rolling element) is provided, which rolls in a form-fitting manner in the bearing surface 30.

The inclusion in the cassette with the bearing surface 30 is in any case chosen so that when removing the closure plate 34 by loosening the mounting screws 28, the profile roller 22 can be removed and can be replaced.

The axis of rotation 31 is therefore only schematically indicated, because it is a roller bearing axially mounted roller 22.

However, as shown above, the profile roller 22 can also be rotatably received in the cassette 17, 18 with a stub axle in the axis of rotation 31.

In the FIG. 5 is shown that a stepwise adjustment of the forming depth can be effected in that the back plate 25 is provided interchangeable and is replaced, for example, against a back plate 25 of greater thickness. In this case, as the thickness 45 of the back plate is increased, the forming depth of the profile roller 22 in the sheet metal part 9 is also increased.

In another embodiment according to FIG. 5 , which is shown with dashed lines, it may also be provided that the back plate 25 with its guide surface 26 is not parallel to the direction of movement in the direction of arrow 27th but that this guide surface 26a is tapered in the direction of the direction of operation 27 of the cassette. This is symbolized by the guide surface 26a. In this case, a constant change in the forming depth of the profile roller 22 during the working stroke in the direction of arrow 27 would take place during the movement of the cassette with the conically tapered guide surface 26a.

The FIG. 6 shows a cartridge after installation example FIG. 5 as with its guide surface 26 or 26a on a rectified guide surface 46 (see FIG. 7 ) is present.

The guide surface 46 is in this case formed on the outer circumference of the respective stop sleeve 21.

The FIG. 7 shows such an installation example, where it can be seen that the rotationally symmetrical stop sleeve 21 is provided on the outer circumference with a plurality of stepped guide surfaces 46, on each of which the associated guide surfaces 26 in the region of the back plates 25 of the cassettes 17, 18 are arranged.

For securing the position guide projections 42 are integrally formed on the bottom sides of the respective cassette, which are aligned in the radial direction and which are guided in associated radial grooves 40 of the partition plate 20 slidably.

In this way, the cassettes 17, 18 are easily replaceable on the one hand on the bottom surface of the partition plate 20 and on the other hand held with its inner circumference on the outer circumference of the stop sleeve 21.

The FIGS. 8 and 9 show in perspective the structure of a respective cassette 17 or 18. For the same parts according to FIG. 5 the same reference numerals are used.

In FIG. 9 is compared to FIG. 8 for the sake of illustration, the shutter plate 34 is removed. The profile rollers 22 are provided with any desired profile edges 33.

The type of profile edges depends on the type of desired teeth.

In FIG. 11 the combination example of a novel double roller head 23, 23a is shown, which consists essentially of a roller head 23 according to the preceding drawings and also from a roller head 23a, as in principle in the WO 2009/12 45 34 A2 is described.

However, the combination of two roller heads 23, 23a, one of which works from the inside to the outside in the roller head 23 and the other conversion set from the outside to the inside in the roller head 23a, is not yet known from the prior art.

With this novel profile combination roller head 23, 23a, it is now possible for the first time to provide a first toothing 51 on the outer circumference of a sheet metal part 9 and a second toothing 50 on the inner circumference of the same sheet metal part.

It is not necessary for the solution that the two roller heads 23, 23 a work on the same plane; They can also successively as a follow-up tool, for example, first transform the sheet metal part 9 directed from the inside out and in the second forming step then the already transformed from inside to outside sheet metal part later transformed from outside to inside.

In a further embodiment, using the combination of the two roller heads 23, 23a, it is possible for the first time a double-walled pot-shaped sheet metal part 9 at both coaxial circumferences 48, 49 to be provided with a toothing 50, 51.

Such a double-walled sheet metal part 9 is in the Figures 10 ac to see, wherein the outer periphery 48 has a toothing 51 and the inner periphery 49 has a toothing 49. The toothing 51 was applied by the roller head 23 a and the teeth 49 of the roller head 23.

This will, as in FIG. 12 illustrated, introduced in a processing step, a die 5a or other annular holder formed between the inner 49 and the outer periphery 48 of the sheet metal part 9, wherein the radially inwardly directed profile rollers 23a attach a first toothing 51 on the outer periphery 48 of the sheet metal part 9 and the female part 5a resting against the inner circumference of the outer periphery 48 has a complementary toothing 52a. The roller head 23a acts with the profile rollers 22a on the outer periphery 48th

In an analogous manner, the profile rollers 22 directed radially from the inside outward produce a toothing 50 on the inner circumference 49 of the inner ring of the sheet metal part 9, a toothing 50. Here, too, the associated die 5a has a toothing 52 complementary to the toothing 50.

The die 5a can also be a uniform annular part, which has the complementary toothing 52a on the outer circumference and the complementary toothing 52 on the inner circumference. In this embodiment, the teeth 50, 51 are produced on the double-walled workpiece 9 in a single operation.

In Figure 15 shows an alternative embodiment to FIG. 1 characterized in that the roll forming tool is preceded by a deep drawing tool.

The thermoforming tool after FIG. 13 consists essentially of the partition plate 20, on the lower side of a shaping edge 54 is formed. To reshape the in FIG. 13 shown sheet metal part 9-1, the sub-plate 20 is first lowered into the inner cross-section of the sheet metal part 9-1, whereby the forming edge 54 forms a reshaping of the inner collar 53 of the approximately pot-shaped sheet metal part 9-1 and this collar 53 initially formed cylindrical. The dividing plate 20 with its shaped edge 54 corresponds in function to a deep-drawing tool. Only after pressure forming with the deep-drawing tool, the roll-forming tool follows with its profile rollers 22, which then provide the teeth on the inner and / or on the outer circumference of the sheet metal part 9-1.

This embodiment, in which a deep-drawing tool with a leading edge 54 initially immersed in the inner periphery of the sheet metal part 9-1, can be used for all previously described embodiments.

drawing Legend

1

upper tool

2

lower tool

3

guide column

4

guide seat

5

Template 5a

6

Toothing (from 5)

7

Counter-holder piston

8th

mold plate

9

sheet metal part

9-1

sheet metal part

10

ring holder

11

holder

12

Retaining plate

13

Ring plate (scraper 14)

14

scraper

15

traverse

16

pushpin

17

cassette

18

cassette

19

fixing screw

20

partition plate

21

stop bush

22

Forming body or profile roll

22a

Forming body or profile roll

23

Forming head or roller head

23a

Forming head or roller head

24

annulus

25

backplate

26

Guide surface 26a (from 17, 18)

27

arrow

28

screw

29

casing

30

storage area

31

axis of rotation

32

arrow

33

profile edge

34

closing plate

35

partition plate

36

working position

37

working position

38

distance

39

Longitudinal bore (for 19)

40

radial groove

41

edition

42

leadership approach

43

Flange (from 9)

44

platen

45

Thickness (from 25)

46

Guide surface (from 21)

47

Base plate (from 1)

48

Outer perimeter

49

Inner circumference

50

Internal gearing

51

External toothing

52

complementary toothing

52a

(from 5a)

53

Collar (inside of 9)

54

Shaped edge (at 20)

Claims (15)

1. Method for producing an internally and/or externally toothed pot-shaped sheet-metal part (9) with teeth running towards the central axis of the pot, wherein an untoothed pot-shaped sheet-metal part (9) is located in a die (5, 5a) and then a profile is rolled onto the pot-shaped sheet-metal part (9) by shaping elements (22) bearing on the sheet-metal part (9, 9-1) by means of a relative movement between the sheet-metal part (9) and the associated shaping elements (22) and thus alternating internal and external teeth are formed on the sheet-metal part (9), characterised in that the shaping elements (22) oriented radially from the inside to the outside deform the sheet-metal part (9) in that the shaping elements (22) roll along the internal circumference of the sheet-metal part (9).
2. Method according to claim 1, characterised in that arranged on the upper tool (1) of the device (1, 2) there is an ejector (14) which is able to move separately to a shaping head (23, 23a) and ejects the sheet-metal part (9) after completion of the shaping operation and holds the sheet-metal part (9) through a ring-shaped plate when the upper tool (1) is raised.
3. Method according to claim 1 or 2, characterised in that the shaping elements (22, 22a) are adjustable and lockable in cassette-shaped mounting receptacles by displacement radially away from teeth (6) of the die (5).
4. Method according to claim 1 or 2, characterised in that the shaping elements (22, 22a) are adjustable radially during the shaping operation.
5. Method according to one of claims 1 to 4, characterised in that a further shaping head (23a) with cassettes (18) acts on the sheet-metal part (9) from the outside to the inside, the shaping elements (22a) of which are oriented radially inwards on the external circumference of the sheet-metal part (9) to be shaped.
6. Method according to claim 5, characterised in that to produce a double-walled pot-shaped sheet-metal part (9, 9-1) a ring-shaped die (5a) is introduced between an outer circumference (48) and an inner circumference (49) of the double-walled sheet-metal part (9) in order to roll teeth (51) onto the outer circumference (48) and teeth (50) onto the inner circumference (49) of the sheet-metal part (9, 9-1) using the combination of the two shaping heads (23, 23a).
7. Device for producing an internally and/or externally toothed pot-shaped sheet-metal part (9) with teeth running towards the central axis of the pot, which comprises:

   a die (5) for location of an untoothed pot-shaped sheet-metal part (9), shaping elements (22) bearing on the sheet-metal part (9) to roll a profile onto the pot-shaped sheet-metal part (9) by means of a relative movement between the sheet-metal part (9) and the associated shaping elements (22) and to form alternating internal and external teeth on the sheet-metal part (9), characterised in that the shaping elements (22) are embodied and arranged in such a way that they roll along the internal circumference of the sheet-metal part (9) and oriented radially from the inside to the outside deform the sheet-metal part (9).
8. Device according to claim 7, characterised in that a thrust ring or another thrust element is provided to form conical teeth (50, 51) tapering in the longitudinal direction and to exert a pressure oriented in the axial direction on cassettes (17) during the downward stroke, wherein the cassettes (17) have conically bevelled back plates (25) which move on equally conically bevelled guide faces (26) of a stop bush (21) oriented radially inwards, through which a radial shaping depth of the cassettes (17) can be adjusted continuously and/or in steps.
9. Device according to one of claims 7 to 8, characterised in that a first ring (17) of cassettes (17) is arranged on the shaping head (23, 23a), and at least one further ring of cassettes (18) is arranged above the first ring (17) on the shaping head (23, 23a).
10. Device according to one of claims 7 to 9, characterised in that the back plates (25) of the cassettes (17) are interchangeable and depending on thickness (45) allow radial adjustment of the profile roller (22) in the radial direction on the sheet-metal part (9).
11. Device according to one of claims 7 to 10, characterised in that the back plates (25) of the cassettes (17) bear on cylindrical guide faces (26) arranged on the stop bush (21) and aligned parallel to the direction of movement of the shaping head (23).
12. Device according to one of claims 7 to 11, characterised in that the shaping elements (22) are embodied in the form of profile rollers mounted without axles or in the form of thrust elements or in the form of balls or in the form of pins, rollers or other rotatable elements, and at least one shaping element is mounted in a cassette (17, 18) in each case.
13. Device according to one of claims 7 to 11, characterised in that the shaping elements are mounted on axles in the cassette (17, 18).
14. Device according to one of claims 7 to 13, characterised in that a first set of shaping elements (22) is provided which oriented radially from the inside to the outside deforms the sheet-metal part (9) on the internal circumference, in that the shaping elements (22) roll along the internal circumference of the sheet-metal part (9), and in that a second set of shaping elements (22a) is provided which oriented radially from the outside to the inside deforms the sheet-metal part (9) on the external circumference.
15. Device according to one of claims 7 to 14, characterised in that the rolling shaping tool with its shaping elements is associated with a deep-drawing tool (20, 54) which runs ahead in the shaping operation.

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