EP1305125A1

EP1305125A1 - Forming machine with a rotating wedged disc

Info

Publication number: EP1305125A1
Application number: EP01947096A
Authority: EP
Inventors: François MULLER; Ulrich Steinhauser
Original assignee: Hatebur Umformmaschinen AG
Current assignee: Hatebur Umformmaschinen AG
Priority date: 2000-08-02
Filing date: 2001-07-17
Publication date: 2003-05-02
Anticipated expiration: 2021-07-17
Also published as: ES2237577T3; CZ2003304A3; UA72616C2; WO2002009898A1; KR20030036222A; KR100489493B1; DE50105548D1; US6826946B2; EA003987B1; US20030167820A1; EA200201285A1; CN1197670C; EP1305125B1; ATE290444T1; CN1438924A; AU2001268891A1; JP2004504946A; TW514571B; JP3764723B2; CZ296568B6

Abstract

A forming machine according to the invention comprises at least one forming station having a punch and a die as tools and a device for setting the axial position of one of the two tools. The setting device has, as adjusting wedge, a rotary wedge disk which is rotatable about a rotation axis and bears with a bearing surface against a parent body. The rotary wedge disk is provided with an inclined plane on the other disk side. The setting device also comprises a pressure piece which is composed of a pressure part and a rotary part having an end face. The end face bears against the inclined plane in such a way that it is displaced relative to the rotary wedge disk eccentrically to the rotation axis when the rotary wedge disk is rotated, the axial distance between pressure piece and parent body changing in the process. Since the adjusting wedge is a rotary wedge disk, the bearing surface rotates on the parent body and is not displaced longitudinally during an adjustment.

Description

Forming machine with rotating wedge disc

The present invention relates to a forming machine with at least one forming station with a punch and a die as tools and a device for adjusting the axial position of one of the two tools, as defined in the preamble of independent claim 1.

After the initial assembly or replacement of the tools, d. H. of the punch and / or the die, in a forming station, it is often necessary to adjust their position precisely so that the workpieces are precisely formed in the desired manner during operation of the forming machine. In particular, the axial mutual position of the punch and the die must be correct during the forming, which can be achieved by adjusting the axial position of at least one of the two tools. Since the tools are exposed to high impact forces during the forming process, the device for adjusting the axial position must accordingly be designed to be stable.

Up to now, one-piece devices have therefore been used which comprise a vertically displaceable adjusting wedge. A forming machine with such a setting device per forming station is described, for example, in US Pat. No. 4,898,017. The adjusting wedge, which can be displaced in the vertical direction by means of an adjusting screw, rests with a contact surface on a pressure plate, which is fastened to a slide via a further plate. On the other side of the adjustment wedge, which forms an inclined plane, the punch belonging to the forming station is supported by several intermediate elements. By vertical displacement of the adjusting wedge is adjusted due to its inclined plane, the axial position of the stamp.

However, the problem with one-piece devices of this type is that the large impact forces during the forming process in the pressure plate can result in indentation depressions produced by the adjusting wedge, which on the one hand hinder an adjustment of the adjusting wedge and on the other hand promote the occurrence of bending fractures if the adjusting wedge after moving over an edge of one Impression deepening comes to lie. In addition, the application of force to the pressure plate and ultimately to the slide changes when the adjusting wedge is moved.

In view of the disadvantages of the previously known adjusting devices in forming machines described above, the invention is based on the following object. A forming machine of the type mentioned at the outset is to be created with at least one forming station with a punch and a die as tools and a device for adjusting the axial position of one of the two tools, in which the application of force to a base body is not essential when the adjusting wedge is adjusted changes. The basic body is understood here to mean in particular the machine body, the machine body with the pressure plate, the press slide or the press slide with the pressure plate. In addition, the risk of the adjusting wedge breaking should preferably be avoided. Indentations that cannot be avoided should not hinder the adjustment of the adjustment wedge.

This object is achieved by the inventive forming machine as de in the independent claim 1 ^¬ is finiert. Preferred design variants result from the dependent patent claims. The forming machine according to the invention comprises at least one forming station with a punch and a die as tools and a device for adjusting the axial position of one of the two tools, the device comprising an adjusting wedge with a contact surface which bears on a base body. The essence of the invention consists in the fact that the adjusting wedge is a rotating wedge disk that can be rotated about an axis of rotation, has the contact surface on one disk side and an inclined plane on the other disk side, and the device further comprises a pressure piece with an end face, which rests on the inclined plane in such a way that it rotates eccentrically to the axis of rotation when the rotary wedge disk rotates, the axial distance between the pressure piece and the base body changing.

Because the adjustment wedge is a rotating wedge disk that rotates when it is adjusted, the contact surface on the base body also rotates and is not moved lengthways. As a result, the introduction of force to the base body is not changed significantly when the adjusting wedge is adjusted and is therefore more optimal than in the previous forming machines.

The contact surface is preferably circular and rotates when the rotary wedge disk rotates in place on the base body. This means that the rotating wedge disc rotates in the indentation depression that may arise during the forming process and never comes to rest over an edge of the indentation depression. In this way, the risk of breakage and the obstruction of the adjustment of the adjusting wedge by indentations can be avoided or at least significantly reduced. A toothed ring is advantageously arranged on the rotating wedge disk, via which it can be rotated. Due to the fact that the rotating wedge disk is driven via a ring gear on the periphery, the contact surface and the inclined plane are not affected by drive elements.

Means for locking the rotating wedge disk are preferably present in any adjustable position. In this way, it can be prevented that the large impact forces occurring during the forming process cause an undesired rotation of the rotating wedge disk.

The angle of inclination of the inclined plane with respect to the contact surface is advantageously a maximum of 10 °. The angle of inclination is smaller than the limit angle for self-locking, which can prevent the end face from being accidentally shifted on the inclined plane.

The pressure piece preferably comprises a rotatable rotating part which has the end face and thus a first rotating part

Sliding surfaces connected, rotatable pressure part. When adjusting the rotating wedge disc, the rotating part with the end face can then be rotated at the same time, while the pressing part is only displaced axially, as a result of which the subsequent tool is not rotated.

In an advantageous embodiment variant, the first sliding surfaces have the shape of a convex or a complementary concave spherical surface section. This has the advantage that the rotary part does not necessarily have to be rotated when the rotary wedge disk is adjusted with respect to it.

In an alternative exemplary embodiment, the rotating part comprises an end face part which has the end face and a joint part connected to it via second sliding surfaces and having one of the first sliding surfaces. The second sliding surfaces preferably have the shape of a convex or a complementary concave cylinder jacket or spherical surface section. If the second sliding surfaces are in the form of spherical surface sections, the rotating part does not necessarily have to be rotated when the rotating wedge disk is adjusted with respect to the latter.

The forming machine according to the invention advantageously has means for rotating the rotating part or, if present, the joint part coupled to the rotating wedge disk, these means preferably comprising a toothed ring which is arranged on the rotating part or, if present, on the joint part. This ensures that the rotating part or the articulated part rotates together with the rotating wedge disk, which can ensure that the pressure piece does not tilt or that its correct end face contact is maintained on the inclined plane of the rotating wedge disk.

In an advantageous embodiment variant, the pressure piece and the rotating wedge disk have a through hole and / or an arcuate through slot for one

Ejector on. Preferably, there is a central through hole in the pressure piece or in a part of the pressure piece, for example if present in the pressure part and possibly in the articulated part, and in the rotating wedge disk and any other parts of the pressure piece there is an arcuate through slot or a through hole enlarged with respect to the diameter of the ejector, so that an adjustment of the rotating wedge plate is possible despite the ejector. In the following, the forming machine according to the invention with at least one device for adjusting the axial position of one of the tools is described in more detail with reference to the accompanying drawings using four exemplary embodiments. Show it:

FIGS. 1 a, 1 b schematically show a one-piece device of a first exemplary embodiment of the forming machine according to the invention with a full stroke in a side view and a top view;

2a, 2b - the one-part device with medium stroke in a side view and a plan view;

3a, 3b - the adjustment device at stroke 0 in one

Side view and a top view;

4 shows a partial sectional view of the adjusting device arranged in the stamping machine on the stamp side according to the first exemplary embodiment;

5 shows a perspective view of a part of the first exemplary embodiment of the forming machine with two one-piece devices arranged next to one another;

FIG. 6 shows a perspective view of an adjusting device of the forming machine from FIG. 5;

Fig. 7 - is a top view of the ring gear with flights of the rotary wedge disk Einsteileinrich ^¬ processing according to the first embodiment;

8 - a top view of the sprocket with entrainment mer of the rotating part of the adjusting device according to the first embodiment;

9 shows a partial sectional view of a part of the one-piece device arranged in the forming machine according to the first exemplary embodiment, with a pressure piece comprising a pressure part and a rotary part, which are connected via flat sliding surfaces;

10 shows a partial sectional view of a part of the one-piece device arranged in the forming machine according to a second exemplary embodiment, with a pressure piece comprising a pressure part and a rotating part which are connected by way of spherical surface section-shaped sliding surfaces;

11 shows a partial sectional view of a part of the one-piece device arranged in the forming machine according to a third exemplary embodiment, with a rotary part comprising a joint part and an end face part which are connected by means of sliding surfaces in the form of cylindrical sections; and

12 - a partial sectional view of a part of the one-piece device arranged in the forming machine according to a fourth exemplary embodiment, with one a joint part and one

End face part, which are connected via spherical-section-shaped sliding surfaces, comprehensive rotating part. Figures la to 3b

A forming machine according to the invention with at least one forming station with a punch and a die as tools comprises, in a first exemplary embodiment, a device for adjusting the axial position of one of the tools, which has a rotating wedge disk 1 rotatable about an axis of rotation 13 and a thrust piece 3 adjoining it. The rotating wedge disc 1 is provided on one disc side with a contact surface 11 for contacting a base body and on the other disc side with an inclined plane 12. The pressure piece 3 has an end face 31 which bears eccentrically to the axis of rotation 13 on the inclined plane 12.

The axial position is set by rotating the rotating wedge disk 1 and the pressure piece 3, the rotating wedge disk 1 and the pressure piece 3 being rotated by the same angle, so that the contact surface 11 of the rotating wedge disk 1 and the end face 41 of the pressure piece 3 are aligned and parallel do not change. Since both the rotary wedge disc 1 with respect to its axis of rotation 13 and the pressure piece 3 with respect to its axis of rotation 42 should not or cannot be displaced by the arrangement in the forming machine, the end face 31 of the pressure piece 3 becomes relative when the rotary wedge disk 1 and the pressure piece 3 rotate shifted to the rotating wedge disc 1 eccentrically to its axis of rotation 13.

In the present first exemplary embodiment, there is an ejector 4 crossing the one-part device, the pressure piece 3 having a through hole 40 and the rotary wedge disk 1 having an arcuate through slot 15 for this purpose. When the rotary wedge disk 1 and the pressure piece 3 rotate, the ejector 4 and the through hole 40 remain in place, while the arcuate through hole gear slot 15 shifts with respect to the ejector 4. The arcuate through slot 15 allows rotation of up to 180 °.

La and lb show the adjusting device at full stroke a _v with the ejector 4 at one end of the arcuate through slot 15. By rotating the rotary wedge disc 1 and the pressure piece 3 according to the arrows A and C by 90 °, a middle is Hub a according to FIGS. 2a and 2b reached. The end face 31 of the pressure piece 3 has shifted eccentrically relative to the rotary wedge disk 1 relative to its axis of rotation 13, which is clearly recognizable from the position of the pressure piece 3 with respect to the arcuate through slot 15. The relative displacement takes place by rotating the rotating wedge disc 1 under the pressure piece 3. By rotating the rotating wedge plate 1 and the pressure piece 3 by a further 90 °, the 0 stroke a ₀ according to FIGS. 3a and 3b is reached, in which the ejector 4 is located at the other end of the arcuate through slot 15. The stroke is increased accordingly by turning the rotating wedge disc 1 and the pressure piece 3 in the direction of the arrows B and D.

The following stipulation applies to the entire further description. If reference numerals are included in a figure for the sake of clarity in the drawing, but are not explained in the directly associated description text, reference is made to their mention in the previous description of the figures.

Figures 4 to 9

In the first exemplary embodiment, the pressure piece 3 comprises a rotatable rotary part 30 and a non-rotatable pressure part 32 which, in a receiving part 5 with a removable cover 51, for example a stamp holder with a stamp holder cover, is arranged. By means of a clamping element 6, for example a screw, the pressure part 32 and thus indirectly the rotating part 30 and the rotating wedge disk 1 are tensioned in the direction of the base body 2 against which the rotating wedge disk 1 rests with its contact surface 11. To adjust the stroke of the adjusting device, the tensioning element 6 is released and tightened again after the rotating wedge disc 1 and the rotating part 30 have been rotated. When adjusting the stroke, only the rotating wedge disc 1 and the rotating part 30 are rotated, while the pressure part 32, which is connected to the rotating part 30 via sliding surfaces 33, 34, does not rotate, so that the tool directly or indirectly attached to it is not rotated.

In addition to the situation at 0 stroke, the situation at full stroke is also shown in FIG.

The contact surface 11 of the rotary wedge disc 1 is circular and rotates when the rotary wedge disc 1 rotates in place on the base body 2. The rotary wedge disc therefore always rotates in the indentation depression that may arise during the forming process and never comes to lie over an edge of the indentation depression.

To rotate the rotary wedge disc 1, a toothed ring 14 is arranged thereon, which extends over an angle of approximately 180 °. The ring gear 14 is part of a ring 140 which is detachably fastened to the rotary wedge disk 1 by means of three driving bolts 141.

The angle of inclination of the inclined plane 12 with respect to the contact surface 11 is smaller than the critical angle for self-locking, advantageously a maximum of 10 °, so that an inadvertent displacement of the end face 31 on the inclined plane 12 is prevented. However, this has the consequence that when turning the rotating wedge disc 1, the rotating part 30 is not automatically rotated, but must be driven separately. For this purpose, the rotating part 30 is provided with a toothed ring 39 which extends over an angle of approximately 180 °. The ring gear 39 is part of a ring 390 to which a driver pin 391 is screwed by means of a screw 392. The driver pin 391 serves on the one hand to connect the ring gear 39 to the rotating part 30 and on the other hand part of it is located in an arcuate groove 52 in the receiving part 5. The arcuate groove 52 extends over an angle of less than 180 °, for example 175 °, so that their ends act as a stop for the driving pin 391 and thus result in a rotation limitation.

The rotating wedge disk 1 and the rotating part 30 are driven via two pinions 71 and 72 arranged on the same shaft 7, which mesh with the ring gears 14 and 39, respectively. The shaft 7 in turn is driven by a drive pinion 73 which engages with the pinion 72 and which is motor-driven or with a hand tool, eg. B. square wrench can be operated. In order to be able to lock the rotating wedge disk 1 and the rotating part 30 in any adjustable position, a pivotable toothed lever 74 is fitted in the receiving part 5, which is pressed by a spring 75 onto the drive pinion 73 and blocks it in this way. Before the drive pinion 73 is actuated, the toothed lever 74 must, for. B. pushed or pulled away by the hand tool.

In order to make the stroke of the adjusting device visible, an indicator disc 76 is provided in front of the drive pinion 73, which is provided with a stroke scale. The rotational position of the drive pinion 73 can be directly will be. The zero position of the stroke scale corresponds to the middle stroke position shown in FIGS. 2a and 2b.

The forming machine according to the first exemplary embodiment has a plurality of forming stations arranged next to one another, two forming stations 91, 92 being shown in FIG. 5. Each forming station 91, 92 is provided with a device for adjusting the axial position of one of the tools, i.e. stamp or die.

Second embodiment - Figure 10

In this second exemplary embodiment, in addition to the situation with an O stroke, the situation with a full stroke is also shown in broken lines. The rotating wedge disk 1 with contact surface 11, inclined plane 12 and ring gear 14 corresponds to the first exemplary embodiment. A pressure piece 103 is composed of a non-rotatable pressure part 132 and a rotatable rotating part 130 with a ring gear 139 and an end face 131. The essential difference from the first exemplary embodiment is that the pressure part 132 is provided with a sliding surface 133 in the form of a convex spherical surface section and the rotating part 130 is provided with an adjoining sliding surface 134 in the form of a complementary concave spherical surface section. These two spherical surface section-shaped sliding surfaces 133, 134 make it possible for the rotating part 130 not to be rotated in accordance with the rotating wedge disk 1. Rather, the rotating part 130 can be driven independently of the rotating wedge disk 1 or it is even possible to dispense entirely with a rotary drive.

For the rest, what has been said about the first embodiment applies accordingly. Third embodiment - Figure 11

In this third exemplary embodiment, in addition to the situation with an O stroke, the situation with a full stroke is also shown in broken lines. The rotating wedge disk 1 with contact surface 11, inclined plane 12 and ring gear 14 corresponds to the first exemplary embodiment. A pressure piece 203 is composed of a non-rotatable pressure part 232 and a rotatable rotating part 230, which are connected via flat first sliding surfaces 233 and 234, respectively. The rotating part "230 comprises an end face part 235 having an end face 231 and a joint part 236, which is connected to it via second sliding surfaces 237 and 238 and has the first sliding surface 234. The joint part 236 is driven by a ring gear 239 corresponding to the ring gear 39 of FIG The second sliding surfaces 237, 238 have the shape of a convex or a complementary concave cylinder jacket section, thereby rotating the end face part 235 when the rotary wedge disk 1 and the joint part 236 are rotated simultaneously and by the same angle ,

For the rest, what has been said about the first embodiment applies accordingly.

Fourth embodiment - Figure 12

In this fourth exemplary embodiment, in addition to the situation with 0 stroke, the situation with full stroke is also shown in dash-dot lines. The rotating wedge disk 1 with contact surface 11, inclined plane 12 and ring gear 14 corresponds to the first exemplary embodiment. A pressure piece 303 is composed of a non-rotatable pressure part 332 and a rotatable rotating part 330, which are connected by flat first sliding surfaces 333 and 334, respectively. The rotating part 330 comprises an end face part 335 having an end face 331 and a joint part 336, which is connected to it via second sliding surfaces 337 and 338 and has the first sliding surface 334. The joint part 336 is provided with a toothed ring 339 for driving it, corresponding to the toothed ring 39 of the first exemplary embodiment. In contrast to the third exemplary embodiment, the second sliding surfaces 337, 338 here have the shape of a convex or a complementary concave spherical surface section. These two spherical surface section-shaped sliding surfaces 337, 338 make it possible for the joint part 336 not to be rotated in accordance with the rotating wedge disk 1. Rather, the joint part 336 can be driven independently of the rotary wedge disc 1 or it is even possible to dispense entirely with a rotary drive.

In addition to the above-described forming machines with devices for adjusting the axial position of a tool, further design variations can be realized. Here are also explicitly mentioned:

- In principle, the pressure piece 3, 103, 203 or 303 axially stationary and the rotary wedge disc 1 together with the

Base body 2 can be arranged axially displaceable.

- The pressure part 32, 132, 232 or 332 does not have to be non-rotatable in all cases. If the associated tool may be rotated, the pressure part 32, 132, 232 or 332 may be rotatable. For example, it can also be formed in one piece with the rotating part 30 or the joint part 236 or 336.

- The rotating part 30 or 130 and the ring gear 39 or 139 could be designed so that the rotating part 30; 130 from the ring gear 39; remaining in the receiving part 5; 139 can be removed and pushed back in. The drive of the device for adjusting the axial position can be removed when the rotary part 30; 130 in

Receiving part 5 remain if no repair of the drive is required.

The receiving part 5 can also be made in several parts in the direction of the adjustment, that is z. B. from a part for receiving the pressure part 32; 132; 232; 332 and from a part for receiving the rotating wedge disc 1 and the rotating part 30; 130; 230; 330 exist.

^• ■ E

Claims

claims

1. Forming machine with at least one forming station (91, 92) with a punch and a die as tools and a device for adjusting the axial position of one of the two tools, the device comprising an adjusting wedge (1) with a contact surface (11) which rests on a base body (2), characterized in that the adjusting wedge is a rotating wedge disk (1) which can be rotated about an axis of rotation (13) and which has the contact surface (11) on one disk side and an inclined plane on the other disk side (12), and the device further comprises a pressure piece (3; 103; 203; 303) with an end face (31; 131; 231; 331) which bears against the inclined plane (12) in such a way that it bears against a rotation of the rotary wedge disc (1) relative to the latter moves eccentrically to the axis of rotation (13), the axial distance between the pressure piece (3; 103; 203; 303) and the base body (2) changing.

2. Forming machine according to claim 1, characterized in that the contact surface (11) is circular and rotates on rotation of the rotating wedge disc (1) in place on the base body (2).

3. Forming machine according to claim 1 or 2, characterized in that a ring gear (14) is arranged on the rotating wedge disc (1), via which it can be rotated, preferably means for locking the rotating wedge disc (1) being present in each adjustable position.

4. Forming machine according to one of claims 1 to 3, characterized in that the angle of inclination of the schie- fen plane (12) with respect to the contact surface (11) is a maximum of 10 °.

5. Forming machine according to one of claims 1 to 4, characterized in that the pressure piece (3; 103; 203;

303) a rotatable rotating part (30; 130; 230; 330) having the end face (31; 131; 231; 331) and a first sliding surface (33, 34; 133, 134; 233, 234; 333, 334) connected, rotatable pressure part (32; 132; 232; 332).

6. Forming machine according to claim 5, characterized in that the first sliding surfaces (133, 134) have the shape of a convex or a complementary concave spherical surface section.

7. Forming machine according to claim 5, characterized in that the rotating part (230; 330) has an end face part (231; 331) having end face part (235; 335) and a connection therewith via second sliding surfaces (237, 238; 337, 338) standing, one of the first sliding surfaces (234; 334) having hinge part (236; 336).

8. Forming machine according to claim 7, characterized in that the second sliding surfaces (237, 238; 337,

338) have the shape of a convex or a complementary concave cylinder jacket or spherical surface section.

9. Forming machine according to one of claims 5 to 8, characterized in that it has means for rotating the rotating part (30; 130) or, if present, the joint part (236; 336) coupled to the rotating wedge disc (1), these means preferably comprise a ring gear (39; 139; 239; 339) which on the rotating part (30; 130) or if present on the hinge part (236; 336) is arranged.

10. Forming machine according to one of claims 1 to 9, characterized in that the pressure piece (3; 103; 203; '303) and the rotary wedge disc (1) have a through hole (40) and / or an arcuate through slot (15) for an ejector (4).