EP3965954A1

EP3965954A1 - Workpiece drive and descaling device having a workpiece drive

Info

Publication number: EP3965954A1
Application number: EP20725138.0A
Authority: EP
Inventors: Udo Hertel
Original assignee: Wendt Maschinenbau & Co Kg GmbH; Hauhinco Maschinenfabrik G Hausherr Jochums GmbH and Co KG
Current assignee: Wendt Maschinenbau & Co Kg GmbH; Hauhinco Maschinenfabrik G Hausherr Jochums GmbH and Co KG
Priority date: 2019-05-06
Filing date: 2020-05-06
Publication date: 2022-03-16
Anticipated expiration: 2040-05-06
Also published as: PL3965954T3; ES2961883T3; US20220219214A1; US11845119B2; EP3965954C0; EP3965954B1; DE102019111723A1; WO2020225327A1; EA202193008A1

Abstract

A workpiece drive (3) for rotating a circular workpiece (20) in a descaling device (1) is presented, wherein the workpiece drive (3) has a carrier (8). The invention addresses the problem of making all the faces of the circular workpiece (20) accessible for descaling in a single work step. The problem is solved by a workpiece drive (3) having at least three carrier roller modules (9), wherein each of the carrier roller modules (9) has a mount (10) and a carrier roller (11) for the circular workpiece (20), wherein the carrier roller (11) has a longitudinal axis (12), a lateral surface (13) and a radius (14) between the longitudinal axis (12) and the lateral surface (13), and the radius (14) decreases in a longitudinal direction (15) along the longitudinal axis (12), wherein the mount (10) mounts the carrier roller (11) such that the latter is rotatable about the longitudinal axis (12), wherein each of the carrier roller modules (9) has a drive (16) and the drive (16) is configured to rotate the carrier roller (11) about the longitudinal axis (12), and wherein the mounts (10) are arranged on the carrier (8) such that the longitudinal axes (12) have an intersection point (18) and lie in a plane (19) perpendicular to the gravity field vector (g) and such that the longitudinal directions (15) are directed towards the intersection point (18).

Description

Workpiece drive and descaling device with workpiece drive

On the one hand, the invention relates to a workpiece drive for rotating a circular workpiece in a descaling device. The workpiece drive has a carrier

On the other hand, the invention relates to a descaling device for a circular workpiece. The descaling device has a housing, such a workpiece drive and a first scale washer. The first scale washer is arranged in the housing. Next, the housing for receiving a circular workpiece is formed on the workpiece drive.

A circular workpiece in any case has a first end face, a second end face, an outer jacket surface and a circular outer contour, wherein the workpiece can be placed on the circular outer contour. The circular outer contour is a line of intersection between the outer jacket surface and the first end face. A circular workpiece often also has an inner circumferential surface. The surfaces are covered with tinder and the temperature is usually so high that it glows. The high temperature is required for further processing of the workpiece. Round workpieces have a mass of a few kilograms to a few tons. There are in particular cylindrical and rotationally symmetrical work pieces, such as rings, wheel tires and discs.

A workpiece drive known from the prior art has a turntable with an axis of rotation. The turntable is arranged on the carrier and has a drive for rotating the turntable. A circular workpiece with an inner circumferential surface with the first end face is placed on the turntable. So that the circular workpiece placed on the turntable is concentric to the axis of rotation, the workpiece drive usually has a guide. The guide is, for example, a dome that is arranged on the turntable concentric to the axis of rotation. This dome centers the workpiece when the workpiece is placed on the turntable relative to the axis of rotation by guiding the inner surface.

In a descaling device known from the prior art with such a workpiece drive, the workpiece drive rotates the rotary plate with a hot workpiece, while the first descaler descalers a surface of the workpiece. Descaling a hot workpiece is usually done with water under high pressure, which is blasted onto the workpiece. Essentially, the scale on the workpiece is knocked off the surface and rinsed off by the impulse of the impacting water. Only free areas of the workpiece can be removed. The housing surrounds the workpiece, the first scale washer and the turntable, so that the water and the flaked scale do not pose a risk to the environment of the descaling device and at least a substantial part of the liquid water and the scale do not leave the housing got.

Since the workpiece sits with the first face on the turntable and the guide usually covers another surface of the workpiece, the workpiece must be repositioned at least once to descaling all surfaces. Concealed surfaces, such as the first face that is covered by the turntable, are not accessible to the scale washer. Accordingly, not all surfaces of a workpiece, that is to say the first and second end face, the inner jacket and the outer jacket surface, can be descaled in a single work step, since a work step is ended by a transfer.

Moving a workpiece in the descaling device requires, on the one hand, a suitable relocating device and, on the other hand, costs time. The development and manufacture of a transfer device cost time and money. In addition, the workpiece cools down further in the time it takes to move it. A cooling of the workpiece is undesirable, since only a sufficiently hot workpiece can be processed. In addition, the workpiece is also cooled down by sitting on the turntable.

The object of the present invention is to overcome or at least alleviate the disadvantages set out.

The task is solved by a workpiece drive according to claim 1 ge. This workpiece drive has at least three support roller modules. Each of the support roller modules has a bearing and a support roller for a circular workpiece. The support roller has a longitudinal axis, a man telfläche and a radius between the longitudinal axis and the lateral surface. The radius decreases in a longitudinal direction along the longitudinal axis. The bearing supports the idler roller so that it can rotate around the longitudinal axis. Each of the supporting lenmodule has a drive and the drive is designed to rotate the support roller about the longitudinal axis.

The bearings are arranged on the carrier in such a way that the longitudinal axes have an intersection point, so that the longitudinal directions are directed towards the intersection and so that the lateral surfaces for a workpiece placed on the support rollers form a conical receptacle with a receptacle axis, the receptacle axis is aligned essentially parallel to the earth's gravity field vector.

The workpiece drive is designed for placing a circular workpiece on the at least three support rollers. Each of the drives has a motor for rotating the support rollers. The drives are designed to rotate the support rollers at the same speed in the same direction.

The conical receptacle, which is formed by the jacket surfaces of the support rollers for a workpiece placed on the support rollers, is a geometrical surface which is determined by the jacket surfaces of the support rollers. The area has a center point and rises towards the outside, i.e. against the catching direction, against the earth's gravitational field vector. The shape of the lateral surfaces of the support rollers in connection with the orientation and arrangement of the support rollers to one another initially ensures that a circular workpiece placed on the support rollers is only in contact with the support rollers with its circular outer contour. Thus, a contact area between a circular workpiece and the workpiece drive is reduced compared to the prior art, whereby the cooling of the workpiece is also reduced. Furthermore, if the workpiece has been placed eccentrically to a centering axis that runs through the intersection and is parallel to the earth's gravitational field vector, it centers itself when rotating through the rotating support rollers to the centering axis, so that it finally rotates concentrically around the centering axis. This means that guidance as in the prior art is no longer necessary. For normal use, the center of the conical seat is on the center axis.

In one embodiment of the workpiece drive, it is provided that an opening angle of the conical receptacle is greater than 160 ° and less than 180 °.

The object is also achieved by a workpiece drive according to patent claim 3. This workpiece drive has at least three support roller modules. Each of the support roller modules has a bearing and a support roller for a circular workpiece. The support roller has a longitudinal axis, a man face and a radius between the longitudinal axis and the lateral surface. The radius decreases in a longitudinal direction along the longitudinal axis. The bearing supports the idler roller so that it can rotate about the longitudinal axis. Each of the support roller modules has a drive and the drive is designed to rotate the support roller about the longitudinal axis.

The bearings are arranged on the carrier in such a way that the longitudinal axes have an intersection point and lie in a plane perpendicular to the earth's gravitational field vector and so that the longitudinal directions are directed towards the intersection point.

For the workpiece drive according to claim 3, the statements on the workpiece drive according to claim 1 apply accordingly.

In the following, configurations of the workpiece drives according to patent claims 1 and 3 are described.

In one embodiment of the workpiece drive it is provided that the position stanchions are arranged on the carrier in such a way that the longitudinal axes are ra dialsymmetrical. Radial symmetry exists when the angles between two adjacent longitudinal axes are equal. The radially symmetrical arrangement of the longitudinal axes centering a circular workpiece placed eccentrically on the support rollers with the smallest number of revolutions of the workpiece by the workpiece drive.

In a further embodiment it is provided that at least one of the lateral surfaces is conical. If the lateral surface of a support roller is conical, then the support roller is a straight cone or truncated cone. The cone or truncated cone preferably has a cone opening angle greater than 0 ° and less than 60 °. The cone opening angle must be selected in such a way that the conical shape of the conical receptacle is retained. With very small cone opening angles in the range mentioned, the support rollers are practically cylinders. With a cone or truncated cone as a support roller, the radius decreases in the longitudinal direction along the longitudinal axis in proportion to a distance on the longitudinal axis. Cones or truncated cones offer themselves as support rollers, as these are easier to manufacture compared to other lateral surfaces with radii that do not decrease proportionally to a distance on the longitudinal axis. The mounting of a support roller module can be arranged on an inside and / or outside of the workpiece drive. The inside is on the side of the support roller of the support roller module on which the intersection of the longitudinal axes of the support rollers lies, whereas the outside is on the other side of the support roller.

In a further embodiment it is provided that at least one of the support roller modules is supported only on one side of the support roller in relation to the longitudinal axis. This one-sided mounting of a roller on either the inside or the outside has the effect that the roller is easier to remove and install than with a double-sided mounting. Since idler rollers wear out during use, the one-sided bearing reduces maintenance costs and downtimes.

In a further development of the above embodiment it is provided that the support roller is arranged between the bearing and the intersection. Thus, the support roller is mounted on the outside. By arranging the storage on the outside, the storage is easier to access, Lich than if it were on the inside. Thus, the maintenance of the storage is simplified. Preferably all bearings are on the outside. Because then the inside is free. The free inside enables free access to the inner circumferential surface of a circular workpiece placed on the workpiece drive.

The object is also achieved by a descaling device according to claim 8. This descaling device has one of the workpiece drives previously described. In addition to the first, it also has a second and third scale washer. The first scale washer is arranged on the carrier for irradiating the outer jacket surface, the second scale washer on the carrier between two adjacent support rollers for irradiating the first face and the third scale washer on the carrier for irradiating the second face with a liquid medium, preferably water. The support rollers, the first, second and third scale washer are arranged in the housing so that the medium and the flaked scale do not pose a risk to the environment of the descaling device and at least a substantial part of the liquid medium and the scale does not get out of the housing .

A circular workpiece, which is exposed to the support rollers with its circular outer contour in the housing, is used during operation of the ignition Approximation device rotates around the centering axis by the workpiece drive and, compared to the prior art, not only on one surface but on at least three surfaces, namely the outer jacket, the first face and the second face, with a medium under high pressure for descaling irradiated. Thus, in one work step, three surfaces are descaled rather than one surface. In contrast to the prior art, the workpiece drive enables in particular the arrangement of a scale washer for descaling the first end face.

In one embodiment of the descaling device it is provided that the descaling device has a fourth scale washer, that the fourth scale washer is arranged on the carrier for irradiating the inner circumferential surface with the medium. The four scale washes enable all surfaces of a circular workpiece to be descaled in just a single work step. It is no longer necessary to move the workpiece in order to descale a hidden surface of the workpiece. As a result, no conversion device is required and the time required for Entzun countries is reduced compared to the prior art. The reduced time requirement leads to less cooling of the workpiece.

In a further development of the above embodiment it is provided that the fourth scale washer is designed as a lance. The design of the fourth scale washer as a lance enables the scale washer to be easily moved in and out of the inner surface of a circular workpiece arranged on the support rollers in the housing. The possibility of moving the fourth scale washer into and out of the inner jacket surface makes it easier to place a circular workpiece on the support rollers and remove it.

In a particularly preferred embodiment it is provided that the position stanchions of the support roller modules are on the outside. Then the inside is free, whereby access to the inner lateral surface of a circular workpiece is also free. In this embodiment, it is also possible to use a fourth scale scrubber designed as a lance, since this can be moved unhindered by the inner circumferential surface.

In detail, there is a multitude of possibilities to design and develop the workpiece drive and the descaling device. For this, reference is made to the independent patent claims subordinate claims as well as the following description of a preferred embodiment of a descaling device and of two embodiments of a workpiece drive. In the drawing, Fig. 1 shows an embodiment of a descaling device in egg ner view with housing with a first embodiment of a workpiece drive,

2 shows the embodiment in view without the housing, FIG. 3 shows the embodiment in a sectional front view, FIG. 4 shows the embodiment in a plan view,

Fig. 5 is a support roller of the embodiment, Fig. 6 is an embodiment of a circular workpiece, Fig. 7 is a sectional front view of the workpiece drive, Fig. 8 is a conical receptacle of the workpiece drive and Fig. 9 is a sectional front view of a second Ausführungsbei game of a workpiece drive.

1 to 5 show an embodiment of a descaling device 1 for circular workpieces. It has a housing 2, a first exemplary embodiment of a workpiece drive 3 for rotating a circular workpiece, a first scale washer 4, a second scale washer 5, a third scale washer 6 and a fourth scale washer 7. The fourth scale washer 7 is designed as a fan.

The workpiece drive 3 has a carrier 8 and three carrier roller modules 9. Each of the support roller modules 9 has a mounting 10 and a support roller 11 for a circular workpiece. The support roller 11 has a catch axis 12, a lateral surface 13 and a radius 14 between the catch axis 12 and the lateral surface 13. The radius 14 decreases in a catching direction 15 along the catching axis 12. The lateral surface 13 of the support roller 11 is conical, which is why the support roller 11 is a truncated cone. Consequently, the radius 14 increases proportionally in the catch direction 15 along the catch axis 12 tional to a distance on the longitudinal axis 12. A cone opening angle 30 of the support rollers 11 is 15 °. Truncated cones as support rollers 11 are in front of geous that they are easy to manufacture. The bearing 10 supports the support roller 11 rotatably around the longitudinal axis 12. Each of the support roller modules 9 has a drive 16 with a motor 17 and the drive 16 is designed to rotate the support roller 11 around the longitudinal axis 12. The drives 16 are formed from rotating the support rollers 11 at the same speed in the same direction. The bearings 9 are arranged on the carrier 8 in such a way that the longitudinal axes 12 have an intersection 18, lie in a plane 19 perpendicular to the gravitational field vector g and are radially symmetrical, and so that the longitudinal directions 15 are directed towards the intersection 18.

The bearings 10 are arranged only on one side of the support rollers 11 in relation to the longitudinal axes 12, namely the support rollers 11 are arranged between the bearings 10 and the point of intersection 18. Thus, the bearings 10 are on the outside and not on the inside. The inside is on the side of the support rollers 11 on which the intersection 18 of the longitudinal axes 12 lies, whereas the outside is on the other side of the support rollers 11. The only one-sided bearings 10 of the support rollers 11 on the outside have the effect that the support rollers 11 can be easily removed and installed. Since support rollers 11 wear out during use, the one-sided bearings 10 reduce maintenance costs and downtimes. By arranging the bearings 10 on the outside, the position stanchions 10 are more easily accessible than if they were on the inside. So with the maintenance of the bearings 10 is simplified.

Lig. 6 shows a circular workpiece 20 in Lorm of a rotationally symmetrical workpiece for the workpiece drive 3 and for descaling s before device 1. It has a first end face 21, a second end face 22, an outer circumferential surface 23, an inner circumferential surface 24 and a circular one Au ßenkontur 25 on. The circular outer contour 25 is a line of intersection between the outer circumferential surface 23 and the first end face 21. The workpiece is red-hot and all surfaces are covered with scale.

The Lorm of the lateral surfaces 13 of the support rollers 11 in connection with the orientation and arrangement of the support rollers 11 to each other causes on the one hand that the glowing hot and on all surfaces covered with scale circular workpiece 20 placed on the support rollers 11 only with its circular outer contour 25 is in contact with the support rollers 11. So is a Contact area between the circular workpiece 20 and the workpiece drive 3 reduced compared to the prior art, whereby the cooling len of the workpiece 20 is also reduced. On the other hand, the effect is that the workpiece 20, if it has previously been placed eccentrically to a center axis 26 running through the intersection 18 and perpendicular to the plane 19, is centered on the centering axis 26 when rotating by the rotating support rollers 11, so that it finally rotated concentrically about the centering axis 26. The radially symmetrical arrangement of the longitudinal axes 12 causes the circular workpiece 20, which is placed eccentrically on the support rollers 11, to be centered with the smallest number of revolutions of the workpiece 20 by the workpiece drive 3.

The first scale washer 4 is on the carrier 8 for irradiating the Außenman telfläche 23, the second scale washer 5 on the carrier 8 between two adjacent support rollers 11 for irradiating the first end face 21, the third scale washer 6 on the carrier 8 for irradiating the second end face 22 and the fourth scale washer 7 arranged on the carrier 8 for irradiating the inner surface 24 with water under high pressure. The four Zunderwä's 4, 5, 6, 7 allow descaling of all surfaces 21, 22, 23, 24 of the circular workpiece 20 in just a single step. It is no longer necessary to reposition the workpiece 20, as a result of which the time required for descaling is reduced in comparison with the prior art. The reduced time requirement leads to less cooling of the workpiece.

The support rollers 11 and the four scale washers 4, 5, 6, 7 are arranged in the housing 2 so that the water and flaked scale do not pose a threat to the environment of the descaling device 1 and at least a substantial part of the water and scale does not come out of the housing 2.

The design of the fourth scale washer 7 as a lance enables the fourth scale washer 7 to be easily retracted and extended into the inner surface 24 of the circular workpiece 20 arranged on the support rollers 11 in the housing 2. The possibility of the fourth scale washer 7 in the inner surface To retract and extend 24 makes it easier to place the circular workpiece 20 on the support rollers 11 and remove it.

Fig. 7 shows the workpiece drive 3 in a sectional front view. In this two of the three support rollers 11 and a workpiece 20 placed on the support rollers 11 are visible. The workpiece 20 is in contact with the outer contour tur 25 the lateral surfaces 13 of the support rollers 11. The longitudinal axes 12 have the point of intersection 18 and the longitudinal directions 15 are directed to the point of intersection 18. The longitudinal axes 12 lie in the plane 19. The radii 14 decrease in the longitudinal directions 15 along the longitudinal axes 12. A cone-shaped receptacle 27 with a receptacle axis 28 is formed by the jacket surfaces 13 for the workpiece 20. The conical receptacle 27 is a geometric surface 31, which rolls 11 is determined by the lateral surfaces 13 of the support. The surface 31 has a center point 32 and rises towards the outside, that is, against the longitudinal directions 15, against the earth's gravitational field vector g. The receiving axis 28 is essentially parallel to the earth's gravitational field vector g. Usually, as also here, the receiving axis 28 coincides with the centering axis 26.

Fig. 8 shows the conical receptacle 27 in a perspective presen- tation obliquely from above. The receiving opening swwinkel is 170 ° and is shown exaggerated for better clarity.

Fig. 9 shows a second embodiment of a workpiece drive 3 of the descaling device 1 for circular workpieces 20 in a cut front view. Apart from the following statements, the statements with regard to the first also apply accordingly to the second exemplary embodiment. In FIG. 9, two of the three support rollers 11 and a workpiece 20 placed on the support rollers 11 are visible. The workpiece 20 with the outer contour 25 touches the lateral surfaces 13 of the support rollers 11. The longitudinal axes 12 have the intersection 18 and the longitudinal directions 15 are directed to the intersection 18. In contrast to the first exemplary embodiment, the longitudinal axes 12 in the second exemplary embodiment do not lie in one plane. The radii 14 decrease in the longitudinal directions 15 along the longitudinal axes 12. A conical receptacle 27 with a receptacle axis 28 is also formed here by the lateral surfaces 13 for the workpiece 20 ge. The conical receptacle 27 is a geometric surface 31 which is determined by the lateral surfaces 13 of the support rollers 11. The surface 31 has a center point 32 and rises towards the outside, that is, against the longitudinal directions 15, against the earth's gravitational field vector g. The take-up axis 28 is essentially parallel to the earth's gravitational field vector g. Usually, as also here, the receiving axis 28 coincides with the centering axis 26. Reference number

1 descaling device

2 housings

3 workpiece drive

4 first scale washer

5 second scale washer

6 third scale washer

7 fourth scale washer

8 carriers

9 conveyor roller module

10 Storage

11 conveyor roller

12 longitudinal axis

13 outer surface

14 radius

15 longitudinal direction

16 drive

17 engine

18 intersection

19 level

20 workpiece

21 first face

22 second face

23 outer jacket surface

24 inner surface

25 outer contour

26 centering axis

27 conical seat

28 mounting axis

29 Opening angle

30 cone opening angle 31 geometric surface

32 center point

Claims

1. Workpiece drive (3) for rotating a circular workpiece (20) in a descaling device (1),

wherein the workpiece drive (3) has a carrier (8),

characterized,

that the workpiece drive (3) has at least three support roller modules (9),

that each of the support roller modules (9) has a bearing (10) and a support roller

(11) for the circular workpiece (20), the support roller (11) having a longitudinal axis (12), a lateral surface (13) and a radius (14) between the longitudinal axis (12) and the lateral surface (13) and the radius (14) decreases in a longitudinal direction (15) along the longitudinal axis (12) and wherein the bearing (10), the support roller (11) rotatable about the longitudinal axis

(12) stores,

that each of the support roller modules (9) has a drive (16) and the drive (16) is designed to rotate the support roller (11) about the longitudinal axis (12) and

that the bearings (10) are arranged on the carrier (8) in such a way that the longitudinal axes (12) have an intersection (18) so that the longitudinal directions (15) are directed to the intersection (18) and so that the jacket surfaces ( 13) form a conical receptacle (27) with a receptacle axis (28) for a workpiece (20) placed on the support rollers (11), the receptacle axis (28) being aligned essentially parallel to the earth gravity field vector (g).

2. Workpiece drive according to claim 1, characterized in that a receptacle opening angle (90) of the conical receptacle is greater than 160 ° and less than 180 °.

3. Workpiece drive (3) for rotating a circular workpiece (20) in a descaling device (1),

wherein the workpiece drive (3) has a carrier (8),

characterized, that the workpiece drive (3) has at least three support roller modules (9),

(12) stores,

that the bearings (10) are arranged on the carrier (8) in such a way that the longitudinal axes (12) have an intersection (18) and lie in a plane (19) perpendicular to the earth's gravitational field vector (g) and so that the longitudinal directions (15) are directed to the intersection (18).

4. workpiece drive (3) according to any one of claims 1 to 3, characterized in that the bearings (10) are arranged on the carrier (8) in such a way that the longitudinal axes (12) are radially symmetrical. 5. workpiece drive (3) according to one of claims 1 to 4, characterized in that at least one of the lateral surfaces (13) is conical, preferably having a cone opening angle (30) greater than 0 ° and less than 60 °.

6. Workpiece drive (3) according to one of claims 1 to 5, characterized in that at least one of the support roller modules (9) the position (10) only on one side of the support roller (11) with respect to the longitudinal axis (12 ) is.

7. Workpiece drive (3) according to claim 6, characterized in that the support roller (11) is arranged between the bearing (10) and the intersection (18).

8. Descaling s device (1) for a circular workpiece (20), the descaling device (1) having a housing (2), a workpiece drive (3) for rotating the circular workpiece (20) and a first scale washer (4),

wherein the first scale washer (4) is arranged in the housing (2) and wherein the housing (2) for receiving the circular workpiece (20) with a first end face (21), a second end face (22), an outer shell surface (23) and an inner jacket surface (24) is formed on the workpiece drive (3),

characterized,

that the workpiece drive (3) is designed according to one of claims 1 to 7,

that the descaling device (1) has a second scale washer (5) and a third scale washer (6),

that the first scale washer (4) on the carrier (8) for irradiating the outer surface (23), the second scale washer (5) on the carrier (8) between two adjacent support rollers (11) for irradiating the first end face (21) and the third scale washer (6) is arranged on the carrier (8) for irradiating the second end face (22) with a liquid medium and that the support rollers (11), the second scale washer (5) and the third scale washer (6) in the housing ( 2) are arranged.

9. Descaling device (1) according to claim 8, characterized in that the descaling device (1) has a fourth scale washer (7) that the fourth scale washer (7) on the carrier (8) for irradiating the inner lateral surface (24) is arranged with the medium. 10. Descaling device (1) according to claim 9, characterized in that the fourth scale washer (7) is designed as a lance.