DE10033889A1 - Deep-drawing tool used for deep drawing moldings comprises a female mold having a drawing die with a drawing die opening, a male mold having a drawing punch, and a device producing a local change in the geometry of the drawing die opening - Google Patents

Abstract

Deep-drawing tool (20), especially a composite tool, used for deep drawing moldings (21), e.g. sheet blanks, comprises a female mold (22) having a first and optionally at least one further drawing die (23) with a drawing die opening (24), and a male mold (26) having a first and optionally a further drawing punch (27, 28) assigned to the first or at least a further drawing die and passing at least through the drawing die opening of the assigned drawing die in the drawing direction (29). A device (30) allowing a local change in the geometry of the drawing die opening is provided. Preferred Features: The device allows local deformation, preferably local, radial compression and/or extension of the drawing die to produce a local change in the geometry of the drawing die opening.

Description

The invention relates to a deep-drawing tool, in particular a complete composite tool for deep-drawing molded parts, like sheet metal blanks, with a die, the first one and optionally at least one further, one each Drawing ring opening comprising drawing ring and with a Patrix, the first and possibly another Drawing stamp includes the first or at least one egg is assigned to another drawing ring and at least through the drawing ring opening of the assigned drawing ring in Direction of pull can pass through.

Deep drawing of molded parts, especially sheet metal cut, using deep-drawing tools, which a matri Zen-side pull ring with one pull ring opening and one have a stamp on the male side, which is under Verfor the molded part passes through the drawing ring opening, has been known for many decades and is procedural and on the tool side to a highly developed technology for Production of hollow bodies matured.  

In many cases, the material for the molded parts is ge rolled sheet metal is used, which can be produced efficiently and in itself for deep drawing and the products it produces Moldings is particularly suitable. As a result of However, the sheet metal parts have a more or rolling process less pronounced material anisotropy, which leads to drawing errors marked with "tip formation". Usually four can be offset by 90 degrees to each other sets arranged lobes, in the form of ripples Frontal edges of the hollow parts occur in most Materials are arranged at 45 degrees to the rolling direction. Such tip formation is undesirable because abge these corners in a separate processing step must be separated in order to form smooth-edged hollow bodies reach.

To avoid the formation of lobes are a number of works tools and / or procedural measures proposed been created. These include such measures, at de NEN on the sheet holder during the deep-drawing process Example using hydraulic cylinders a local force is exercised to in those molding areas that for Tending to remain behind the sheet metal edge, a mechanical measure stretching of the material and consequently a reduction in the To achieve tip formation.

Especially when deep drawing non-rotational symmetry hollow parts is also the so-called "hard-soft Touching "has become known placed molded surface indicating surface of the sheet metal holder material removed locally until there is a reduction the tip formation occurs.  

These processes are comparatively complex and allow only an influence on the tip formation in the area of Sheet metal blanks. In the case of multiple drawing stages on a Ge Velvet composite tool can only form the tip in the area the first drawing stage at the level of the sheet metal blank be influenced. In the case of hard-soft touching the measures only on a single special hollow part borders. The production of other molded parts requires one new elaborate immersion on a new sheet holder. If by mistake in this empirical procedure wrong places and / or too much material is removed, the complete sheet holder must be replaced.

In recent years, so-called ver federal tools used. The hollow parts become more subjected to successive pulling operations and either with further transport to another plant stuff or without further transport into a so-called total composite or follow-on tool with several, one inside the other guided drawing punches. With such composite tools larger border drawing ratios can be achieved range, i.e. larger deformations of the hollow parts in drawing direction, usually the degree of deformation per rebound is smaller than in single-stage deep drawing. To this An overall reduced tip formation can be achieved in this way are, however, also not full with this procedure is constantly avoidable.

Accordingly, it is an object of the invention to improve deep-drawing tool, in particular an overall composite to provide an improved quality,  especially a further reduction in the formation of lobes the deep-drawn molded parts.

This object is achieved by the features of claim 1, in particular solved by a local changes with the geometry of the drawing ring opening tel is provided. In this way, another can be Reduction of tip formation during the deep-drawing process achieve, with the possibility of influencing the Tip formation not only on the top drawing stage are limited, but when using the entire network testify in the area of any drawing ring or several random drawing rings or all drawing rings are given.

According to an expedient embodiment, this enables By means of a local deformation, preferably a local ra diale compression and / or extension of the drawing ring, which the local change in the geometry of the drawing ring opening causes. In this way, a ridge or steps can be formation on the surface of the drawing ring in the area of the Prevent pull ring opening so that this continues regarding undisturbed and homogeneous deep-drawing process is reachable.

According to an advantageous further development, the change the geometry of the drawing ring opening is active through the medium feasible so that this is independent of a thermoformed is possible and / or during a deep-drawing process, and / or passively effectuable as a result of the drawing forces exerted on the drawing ring during deep drawing Connection with a local relief of the drawing ring, see above  that the change in the geometry of the drawing ring opening can take place during the deep-drawing process. In the former Falling is the geome through active movement of the agent The pull ring opening changed while in the second ten case, possibly by a controlled local Ent load on the drawing ring as a result of the drawing stamp during deep drawing on the molded part and consequently on the drawing ring applied forces the geometry of the drawing ring opening can be influenced.

It is particularly advantageous if the agent be separately has movable drawing ring contact surfaces. In this way can be single by applying force and / or relief the desired local changes the geometry of the drawing ring opening and a corresponding appropriate influence on the tip formation can be achieved.

It is also advantageous if the means are spaced apart Ziehring-contact surfaces, which preferably in Um catch direction of the drawing ring are arranged spaced. In this way, an advantageous movement game space between the individual drawing ring contact surfaces chen without jamming each other. In each In these cases, it is useful if the pull ring Contact surfaces are formed in several pieces.

It is also useful if four, preferably eight drawing rings arranged circumferentially spaced Contact surfaces are provided. In the latter case leaves in a particularly favorable way by a local Compression of the drawing ring changes the geometry the pull ring opening and that through a local relief  or extension of the drawing ring caused local change combine the geometry of the drawing ring opening.

According to an advantageous embodiment, the Draw ring contact surfaces of the same size or different Lich large circumferential angles along the drawing ring. This read the local attack and relief conditions influence favorably.

It is particularly advantageous if the agents are in groups with the same size drawing ring within each group Contact surfaces, but different sizes in groups Drawing ring contact surfaces are arranged. It is also there possible that the means of the groups with different large drawing ring contact surfaces alternately are arranged. In this way, too the load or relief ratios relating to the Ziehring influence in an advantageous manner.

According to a particularly advantageous development during the deep-drawing of the molded part on the drawing ring acting forces are essentially supported by the agent. This makes it possible, in particular, for total composite deep drawing tools a reduced tool depth in the direction of drawing reach, so that only a correspondingly short stroke necessary is. In this way, the cycle times can be reduce advantageously during deep drawing.

According to a further expedient embodiment, the Transfer of a change in the geometry of the drawing forces on the drawing ring movement of at least one, preferably each means  relative to the drawing ring and at the same time relative to a nor times to the drawing direction or radial to the drawing ring opening neighboring die part can be effected. This he allows a particularly simple and compact design of the means for locally changing the geometry of the drawing ring opening.

According to a preferred embodiment variant, the agent designed as a wedge element, preferably as a wedge ring segment tet. Such wedge elements can be used in particular advantageously transfer forces locally to the drawing ring ten or from the drawing ring on adjacent die parts convict.

It is advantageous if the wedge element is a Wedge surface that is parallel to the direction of drawing arranged or contain a central axis of the drawing ring cutting plane a wedge angle to the direction of drawing or the central axis. This enables a be particularly advantageous power transmission to the drawing ring or from the pull ring to the medium.

It is also particularly advantageous if the wedge surface against the direction of the deep drawing in the Drawing ring opening penetrating punch. dadruch can be deep to that used in the prior art constructing drawing chairs to support the drawing rings and instead they can be relatively small Wedge elements are used. This way advantageously in the deep drawing on the drawing ring acting forces on adjacent to the wedge elements arranged die parts and the tool depth of the  Thermoforming tools can advantageously be reduced so that accordingly short pulling strokes in connection with short cy break times are possible.

The wedge surface expediently forms a drawing ring Contact surface, creating an effective power transmission and a small design are possible.

It is also useful if the wedge element from the drawing ring contact surface and normal to Drawing direction or formed radially to the drawing ring opening Includes support surface, which is preferably radial can support adjacent die part to the drawing ring. On this way, a particularly stable support of the Reach ring.

It is particularly advantageous if the wedge angle such as the materials of Ziehring, Keilelement and Ma trizteil is designed that when stressed the pull ring is self-locking in the pulling direction, the wedge angle is preferably 17.5 degrees. This enables a particularly secure fixation or fastening wedge elements.

According to an expedient further training, the agent is included a passive and / or active actuating device for movement supply of the agent relative to the drawing ring opening or rela tiv to the drawing ring and / or to a neighboring Matri partially connected.

It is also useful if the actuating means at the same time for fastening the agent to the neighboring one  Matrix part serves. This allows a particularly com compact design by integrating functions and a particularly easy and safe handling and operation to reach.

A particularly safe and reproducible actuation lets achieve that the actuating means with a Screw is formed which is a bore of the wedge element interspersed and a screw shaft and in the area ih res actuating end of the screw shaft laterally has outstanding support surface, which for the actuation end of the screw-facing edge of the wedge element overlaps, between the screw shaft and the Sem opposite bore edges of the wedge element egg ne the sleeve receiving the screw shaft is arranged, whose length is greater than the thickness of the wedge element. The Using such shoulder screws enables a si Chere and reproducible adjustment of the wedge elements with a defined preload, even by unskilled operators planning staff.

According to a further advantageous embodiment variant the actuating means is preferably hydraulic and / or electromechanical actuator. In this way do not need manual adjustment work the and also can be an advantageous control and / or regulating the movement of the agent relative to the Drawing ring opening or relative to the drawing ring and / or reach an adjacent part of the die.

The above measures are completely new legs Flow options not only with regard to a reduction  the tip formation, but more generally regarding the Molding and surface design by deep drawing manufactured molded parts available.

The above measures carry both individually and in Combination with each other for an improved deep drawing tool, in particular a composite deep-drawing tool, the improved quality, especially another Reduction of the tip formation of the deep-drawn molded parts made possible.

Other features, advantages and aspects of the invention are the following, dealt with using the figures Removable description part.

A particularly preferred embodiment is shown in the figures example of the invention described. Show it:

Fig. 1 shows a cross section through a deep-drawing tool designed as an overall composite tool, with which a local change in the geometry of the drawing opening enables means, which is designed here as a wedge element, and wherein in the upper half the arrangement of the deep-drawing stamp and the cross-sectional shape of the deep-drawn hollow part is shown at the time of the end of the first drawing stage, and in the lower half of FIG. 1 an arrangement of the interlocking drawing dies with the second drawing die extended and the cross-sectional contour of the hollow part thus formed are shown during a second drawing stage;

FIG. 2 shows a bottom view of the deep-drawing tool according to FIG. 1, only one half of the deep tool being constructed symmetrically to the dash-dotted longitudinal plane;

Fig. 3 is an enlarged partial cross section through the deep-drawing tool of FIG. 1 in the area of the inventive wedge element.

The deep-drawing tool 20 designed as an overall composite tool for deep-drawing the molded part 21, which is preferably formed as a sheet metal blank, comprises the die 22 and the die 26 . The die 22 includes the die body 25, the at normal designed to deep-drawing direction 29 shoulder 73 of the die 27 supporting the drawing ring 23, and between the drawing ring 23 and in drawing Rich tung 29 extending shoulder 74 of the die 25 arranged wedge elements 45; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 .

The male part 26 of the deep drawing tool 20 designed as a follow-up tool is designed with the cylindrical first drawing die 27 and the cylindrical second drawing die 28 guided in it parallel to the drawing direction 29 . The second die 28 is made of solid material, while the first die 27 is designed with a Zylin derrohr. In addition to the second drawing ring 23 here, the die 22 of the deep-drawing tool 20 also comprises a first drawing ring, which, however, is not shown in the figures. This first drawing ring is used for reshaping the molded part 21 in a first drawing stage, in which the molded part 21 is drawn by the first drawing die 27 according to its outer contour through the drawing ring opening, also not shown, of the first drawing ring, forming the cross-sectional contour shown in the upper part of FIG. 1 becomes. The second punch 28 remains slightly behind the first punch 27 . At the end of the first drawing stage, the drawing dies 27 and 28 are in the position shown in the upper part of FIG. 1, in which the outer surface of the molded part 21 deformed in the first drawing stage rests against the inclined surface 69 of the second drawing ring 23 . The forces shown in the upper part of FIG. 1 occur on the drawing ring 23 , which can be divided into the radial force 37 and the axial force 36 .

At the first drawing stage, the second drawing stage follows, in which the second drawing die 28 is moved further in the drawing direction 29 and in which the molded part 21 , as shown in the lower part of FIG. 1, forming a corresponding to the second drawing die 28 smaller inner diameter is further drawn out in length. In the region of the drawing radius 70, the forces shown in the lower part of FIG. 1 occur on the drawing ring 23 , which can be divided into the axial force 38 and the radial force 39 .

The here circular drawing ring 23 is integrally ausgebil det and consists of a steel suitable for deep drawing. The drawing ring 23 is designed in terms of its material and its cross section such that it can deform elastically within certain limits, especially under the action of radial pressure. The drawing ring 23 is rotationally symmetrical to the central axis 47 . The drawing ring 23 has the parallel ring surfaces 67 and 68 , each of which is formed normal to the central axis 47 or normal to the drawing direction 29 . At the opposite to the direction of penetration of the punch 27 and 28 facing ring surface 68 of the drawing ring 23 adjoins the sloping surface 69 serving as the drawing shoulder, to which in turn the cone surface 71 formed with a slight cone widening in the drawing direction 29 closes, the transition is designed with the drawing radius 70 between the inclined surface 69 and the conical surface 71 . The conical surface 71 merges into the annular surface 67 , which points in the direction of the drawing punches 27 and 28 penetrating into the drawing ring 23 . At the annular surface 67 is followed by the conically radially outward widening, limited in cross-section with a straight wedge counter surface 66 which merges in the region of its outer end into a parallel to the Zen axis 47 cylindrical surface of a centering set of the drawing ring 23 .

In order to prevent the drawing ring 23 from tipping out or falling out of the die body 25, depending on the selected tool position, either as a horizontal or vertical drawing tool, the drawing ring 23 is here with the eight wedge elements 45 designed as wedge ring segments 40 via the cylinder screws 50 on the Die body 25 attached. Each wedge element 45 is designed with the wedge surface 46 facing the drawing ring 23 , which forms the drawing ring contact surface 31 and which, in the assembled state, bears against the wedge counter surface 66 of the drawing ring 23 . The wedge surface 46 is configured with a straight line in the cross sections shown in FIGS . 1 and 3 and points in a direction opposite to the direction of penetration of the drawing punches 27 and 28 in the drawing ring 23 . Here, the wedge surface 46 with the central axis 47 of the drawing ring 23 or with the drawing direction 29 forms the wedge angle 48 , so that the Keilele element 45 with its wedge surface 46 in the assembled state can lie par allel to the wedge counter surface 66 of the drawing ring 23 on this. The wedge angle 48 of the wedge surfaces 46 is designed in the exemplary embodiment in such a way to the materials of the drawing ring 23 , the respective wedge element 45 and the shoulder 74 of the die body 25 that when the drawing ring 23 is stressed in the drawing ring 29, a self-locking arrangement between the drawing ring 23 , the wedge element 45 and Matrizenkör per 25 occurs, so that even if only slightly tightened cylinder screw 50 or by an optionally occurring defects Tenden failure of the screw 50 nevertheless a safe be drive the deep-drawing tool is made possible.

Each wedge element 45 is designed as a wedge ring segment 40 and has the contact surface 48 formed as a ring segment surface and the smaller ring segment surface 60 arranged parallel thereto. These two ring segment surfaces extend radially outward from the wedge surface 46 . The wedge element 45 further includes the radially outwardly facing support surface 49 in the assembled state parallel to the drawing direction 29 or parallel to the central axis 47 , which is supported in the assembled state on the shoulder 74 of the Ma trizenkörpers 25 .

As can be seen from FIG. 2, two groups 34.1 and 34.2 of drawing ring contact surfaces 31.1 , 31.3 , 31.5 ; 31.2 , 31.4 and support surfaces 49.1 , 49.3 , 49.5 ; 49.2 , 49.4 wedge elements 45.1 , 45.3 , 45.5 ; 45.2 , 45.4 are provided, which are spaced apart from one another in the circumferential direction and which are formed here in several pieces. In the first group 35.1 of the wedge elements 45.1 , 45.3 , 45.5, the drawing ring contact surfaces 31.1 , 31.3 and 31.5 each extend at a circumferential angle 33.1 , which here is approximately 23 degrees, and in the second group 34.2 , the drawing ring contact surfaces 31.2 and 31.4 of the wedge elements 45.2 and 45.4 in a larger circumferential angle, which is about 64 degrees here. As can also be seen from FIG. 2, here the wedge elements 45.1 , 45.3 , 45.5 associated with the first group 34.1 alternate with the wedge elements 45.2 and 45.4 assigned to the second group 34.2 . The deep-drawing tool 20 shown only on one side in FIG. 2 is formed symmetrically to the longitudinal plane 32 containing the central axis 47 . In this way, four short wedge elements 45.1 , 45.3 , 45.5 and four long wedge elements 45.2 and 45.4 are each arranged alternately, so that a total of eight wedge elements 45 are seen before. It is understood that the number of Keilele elements can be provided according to the user needs in any number between one and any integer multiples of one, the maximum number according to the actual geometric tool ratios and the resulting fastening options for the wedge elements 45 on a reasonable number must be limited.

Each wedge element 45 is provided with at least one bore 51 , here each with two bores 51 , the drilling axis of which is arranged parallel to the direction of drawing 29 or parallel to the central axis 47 , in particular parallel to the support surface 49 of the die body 25 . Through the respective bore 51 extends as a BEFE stigungsmittel for the wedge element 45 and consequently as a fastening means for the drawing ring 23 serving cylinder screw 50th The cap screw 50 is formed with the screw head 57 and the screw thread 53 having screw shaft 52 , so that the cylinder screw 50 with its screw-in end can be screwed into an internal thread 54 of the female body 25 which is designed to match the screw thread 53 . In the cylinder screw 50 in the embodiment, the washer is inserted 55 up, which bears in the mounted state immediately at the side facing the wedge element 45 surface of the screw head 57, and the associated on its opposite side to the bore 51 opening edges 59 of the on bearing surface 58 of the wedge member 45 is present. The sleeve 62 extends between the screw shaft 52 and the inner bore edges 61 of the bore 51 . This has a length 63 which is greater than the thickness 64 corresponding to the distance between the contact surface 58 and the ring segment surface 60 of the wedge element 45 . This sleeve 62 is used when tightening the hexagon provided in the embodiment with a screw 50 to limit the transmitted via the screw head 57 and the intermediate washer 55 on the opening edge 59 of the contact surface 58 of the wedge element 45 forces or tensions, so that depending on the current length 63 of the sleeve and the current geometry of the wedge element 45, this is pressed against the wedge counter surface 66 of the drawing ring 23 by means of the wedge surface 46 with a certain radially inward force. Depending on the length 63 of the sleeve 62 and / or depending on the actual tightening torque of the cylinder screws 50 , a force directed in particular radially to the central axis 47 of the drawing ring 23 can thus be exerted on the drawing ring 23 via the wedge elements 45 so that it can be locally compressed , Accordingly, the geometry of the drawing ring opening 24 can change locally because the drawing ring 23 is elastically deformable within certain limits. For example, the short key elements 45.1 , 45.3 and 45.5 associated with the cylinder screw ben 50 can be tightened in such a way that a relatively large radial force acts on the drawing ring 23 in each case locally, while the cylinder screws 50 assigned to the long wedge elements 45.2 and 45.4 only in this way can be slightly or not at all tightened that the assigned drawing ring contact surfaces 31.2 and 31.4 only press on the wedge counter surface 66 of the drawing ring 23 with a comparatively less or no radial force. As a result, a respective local deformation of the drawing ring 23 can be achieved in such a way that, starting from its originally circular shape, it assumes a shape compressed into a rectangle, so that the drawing ring opening 24 can take on a correspondingly compressed inner contour. It is understood that this effect during the deep-drawing operation itself, that is to say during the passage of the second drawing die 28 assigned to the second drawing ring 23 through its drawing ring opening 24 , due to the radial forces 37 and 39 that occur. It also goes without saying that these Kraftwir effects can be used individually or in combination. Finally, it is also encompassed by the inventive idea, instead of a compression of the drawing ring 23 and a resultant change in the geometry or inner contour of the associated drawing ring opening 24, also to provide an extension of the drawing ring. This can be effected, for example, in a form similar to that described above by the radially outwardly directed forces occurring during the deep-drawing process and by the deep-drawing stamp 28 in reduced forces. However, it is also conceivable that the drawing ring by means of similar to the Keilele elements 45 designed wedge elements can be stretched radially outward, for example, if the drawing ring is provided with receiving recesses for one or more wedge elements and openings for the screw through the wedge elements ble screws. In this embodiment, the drawing ring contact surfaces and correspondingly the wedge surfaces are displaced radially outward in a loading area between the screw and the outer circumference of the drawing ring. It is also possible to use suitable actuators, in particular in the form of hydraulic and / or electromechanical actuating means, with the aid of which an active local change in the inner contour geometry of the drawing ring opening can be implemented.

In the embodiment shown in the figures, the cap screw 50 not only forms a fastening means for both the wedge elements 45 and for the drawing ring 23 , but also forms an actuating means for moving the wedge elements 45 , or their wedge surfaces 46, relative to the drawing ring 23 , respectively its wedge counter surface 46 for transmitting / or recording and normal to the central axis 47 and normal to the drawing direction 29 ended court radial here forces that a deformation, in particular upsetting of the drawing ring 23 and thereby causes a local change in the geometry or inner contour the pull ring opening can cause.

As can also be seen from FIGS . 1 and 2, a particularly compact design of the deep-drawing tool 20 is made possible by the chosen arrangement and design of the wedge elements 46 , because the drawing ring can be supported directly on the wedge surfaces 46 of the wedge elements 45 , which in turn are supported by their Support surfaces 49 can be supported on the shoulder 74 of the die body 25 . As a result, drawing chairs known from the prior art for supporting the axial forces occurring during deep drawing can be dispensed with on the drawing ring. In this way, the axial forces acting on the drawing ring 23 during deep drawing 36 and 38 are essentially converted into radial forces, which in themselves can be absorbed by the screws 50 , but as shown in the exemplary embodiment, advantageously by the shoulders 74 of the die body pers 25 can be caught. This compact design enables, in particular in the case of deep-drawing tools designed as an overall composite or follow-up tools, an effective reduction in the drawing strokes, so that, in addition to the advantageous options for a local change in the geometry of the drawing ring opening of the drawing rings and the resultant tip formation that can be switched off to a minimum or entirely in deep drawing, an effective reduction in cycle times in deep drawing can also be achieved.

As can be seen from FIGS . 1 and 2, the wedge elements 45 designed as wedge ring segments 40 in the case of the short wedge elements 45.1 , 45.3 and 45.5 each have a cross section shown in the upper part of FIG. 1 and between the two bores 51 for inserting the Cylinder screw 50 arranged threaded bore 72 . The long ren wedge elements 45.2 and 45.4 are each provided with two derar term threaded bores 72 , which are each arranged in the vicinity of the respective bore 51 and between the two bores 51 . In these threaded bores 72 can be screwed ge suitably designed jack screws. For the purpose of loosening the wedge elements 45 from the drawing ring 23 , these jack screws can be screwed into the threaded hole 72 until their screw ends rest against the shoulder 73 of the die body 25 , so that by further screwing in the jack screws the respective wedge member 45 from the respective one Wedge-counter surface 66 of the drawing ring 23 can be lifted off.

LIST OF REFERENCE NUMBERS

20

Thermoforming mold

21

molding

22

die

23

drawing ring

24

Drawing ring opening

25

die body

26

punch

27

First stamp

28

Second stamp

29

drawing direction

30

medium

31

Drawing ring-Anlageflächeo

31.1

Drawing ring-bearing surface

31.2

Drawing ring-bearing surface

31.3

Drawing ring-bearing surface

31.4

Drawing ring-bearing surface

31.5

Drawing ring-bearing surface

32

longitudinal plane

33.1

circumferential angle

33.2

circumferential angle

34.1

group

34.2

group

36

axial force

37

radial force

38

axial force

39

radial force

40

Wedge ring segment

40.1

Wedge ring segment

40.2

Wedge ring segment

40.3

Wedge ring segment

40.4

Wedge ring segment

40.5

Wedge ring segment

41

Shoulder of

22

45

key member

45.1

key member

45.2

key member

45.3

key member

45.4

key member

45.5

key member

46

wedge surface

47

Central axis of

23

48

wedge angle

49

support surface

49.1

support surface

49.2

support surface

49.3

support surface

49.4

support surface

49.5

support surface

50

cylinder head screw

51

drilling

52

screw shaft

53

screw thread

54

inner thread

55

washer

56

Actuating end of

50

57

screw shaft

58

contact surface

59

opening edge

60

Ring segment surface

61

hole edge

62

shell

63

length of

62

64

Thickness of

45

65

Wedge counter surface from

23

67

ring surface

68

ring surface

69

sloping surface

70

Drawing radius

71

conical surface

72

threaded hole

73

shoulder

74

shoulder

Claims (22)

1. deep-drawing tool, in particular overall composite tool, for deep-drawing molded parts, such as sheet metal blanks, with a die which comprises a first and optionally at least one further drawing ring each having a drawing ring opening and with a male die which comprises a first and optionally a further drawing die, which is assigned to the first or the at least one further drawing ring and which can at least pass through the drawing ring opening of the assigned drawing ring in the drawing direction, characterized in that a means ( 30 ) which enables a local change in the geometry of the drawing ring opening ( 24 ) is provided , 2. Deep-drawing tool according to claim 1, characterized in that the means ( 30 ) allows local deformation, preferably before a local, radial compression and / or extension of the drawing ring ( 23 ), which lo cal change the geometry of the drawing ring opening ( 24th ) causes. 3. Thermoforming tool according to claim 1 or 2, characterized in that the change in the geometry of the drawing ring opening ( 24 ) by the means ( 30 ) actively and / or passively as a result of the drawing die ( 28 ) during deep drawing on the drawing ring ( 23 ) Exerted forces in connection with a local relief of Ziehrin ges ( 23 ) can be effected. 4. deep-drawing tool according to one of claims 1 to 3, characterized in that the means ( 30 ) separately be movable drawing ring contact surfaces ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ). 5. deep-drawing tool according to one of claims 1 to 4, characterized in that the means ( 30 ) has spaced drawing ring contact surfaces ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ). 6. deep-drawing tool according to one of claims 4 or 5, characterized in that the drawing ring contact surfaces ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ) are arranged spaced apart in the circumferential direction of the drawing ring ( 23 ). 7. thermoforming tool according to claim 6, characterized in that four, preferably eight spaced be drawn ring contact surfaces ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ) are provided. 8. deep drawing tool according to one of claims 4 to 7, characterized in that the drawing ring contact surfaces ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ) over the same size or different sized circumferential angle ( 33.1 ; 33.2 ) along the drawing ring ( 23 ) extend. 9. deep drawing tool according to one of claims 4 to 8, characterized in that the means ( 30 ) in groups ( 34.1 ; 34 , 2 ) with within each group ( 34.1 ; 34.2 ) equally large drawing ring contact surfaces ( 31.1 , 31.3 , 31.5 ; 31.2 , 31.4 ), however, pull ring contact surfaces of different sizes are arranged in groups. 10. deep-drawing tool according to claim 9, characterized in that the means ( 30 ) of the groups ( 34.1 ; 34.2 ) with different sized drawing ring contact surfaces ( 31.1 , 31.3 , 31.5 ; 31.2 , 31.4 ) are arranged alternately in succession. 11. Deep-drawing tool according to one of claims 1 to 10, characterized in that the forces acting on the drawing ring ( 23 ) during the deep-drawing of the molded part ( 21 ) are essentially supported by the means ( 30 ). 12. Deep-drawing tool according to one of claims 1 to 11, characterized in that the transmission of a change in the geometry of the drawing ring opening ( 24 ) enabling forces on the drawing ring ( 23 ) by a movement of at least one, preferably each means ( 30 ) relative to the drawing ring ( 23 ) and, at the same time, relative to a die part arranged normally adjacent to the drawing direction ( 29 ) or radially to the drawing ring opening ( 24 ). 13. deep drawing tool according to one of claims 1 to 12, characterized in that the means as a wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ), preferably as a wedge ring segment ( 40 ; 40.1 , 40.2 , 40.3 , 40.4 , 40.5 ) is designed. 14. Deep-drawing tool according to claim 13, characterized in that the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ) has a wedge surface ( 46 ) arranged in a parallel to the direction of drawing ( 29 ) or a central axis ( 47 ) of the drawing ring ( 23 ) containing the cutting plane forms a wedge angle ( 48 ) to the drawing direction ( 29 ) or to the central axis ( 47 ). 15. Deep-drawing tool according to claim 14, characterized in that the wedge surface ( 46 ) against the direction of penetration during deep-drawing into the drawing ring opening ( 24 ) has the drawing die ( 28 ). 16. Deep-drawing tool according to one of claims 13 or 14, characterized in that the wedge surface ( 46 ) forms a drawing ring contact surface ( 31 ). 17. thermoforming tool according to claim 16, characterized in that the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ) one of the drawing ring contact surface ( 31 ; 31.1 , 31.2 , 31.3 , 31.4 , 31.5 ) pioneering and normal to Drawing direction ( 29 ) or radially to the drawing ring opening ( 24 ) arranged support surface ( 49 ; 49.1 , 49.2 , 49.3 , 49.4 , 49.5 ), which can be supported on a preferably radially adjacent to the drawing ring ( 23 ) die part. 18. Deep-drawing tool according to claim 17, characterized in that the wedge angle ( 48 ) is designed to match the materials of the drawing ring ( 23 ), the wedge element ( 45 ) and the die part, which when the drawing ring ( 23 ) is loaded in the drawing direction ( 29 ). self-locking occurs, the wedge angle preferably being 17.5 degrees. 19. Deep-drawing tool according to one of claims 1 to 18, characterized in that the means ( 30 ) with a passive and / or active actuating means for moving the means ( 30 ) relative to the drawing ring opening ( 24 ) or to the drawing ring ( 23 ) and / or is connected to a neighboring die part. 20. Deep-drawing tool according to claim 19, characterized in that the actuating means serves at the same time for fastening the means ( 30 ) and the drawing ring ( 23 ) to an adjacent die part. 21. Deep-drawing tool according to one of claims 19 or 20, characterized in that the actuating means is formed with a screw ( 50 ) which penetrates a bore ( 51 ) of the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ) and which a screw shaft ( 52 ) and in the area of its actuating end ( 56 ) has a screw surface ( 52 ) laterally projecting contact surface ( 58 ) which indicates the actuating end ( 56 ) of the screw ( 50 ) edge ( 59 ) of the contact surface ( 58 ) of the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ), wherein between the screw shaft ( 52 ) and the opposite bore edges ( 61 ) of the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ) the screw shaft ( 52 ) receiving sleeve ( 62 ) is arranged, the length of which is greater than the thickness ( 64 ) of the wedge element ( 45 ; 45.1 , 45.2 , 45.3 , 45.4 , 45.5 ). 22. deep drawing tool according to one of claims 19 to 21, characterized in that the actuating means preferably hydraulic and / or electromechanical Actuator is.