DE102021123017A1 - Device and method for deburring a workpiece - Google Patents

Abstract

The invention relates to a device (10) and a method for removing a burr (12) from a workpiece (11) using a first fluid jet (F1) ejected from a first nozzle opening (17) and one ejected from a second nozzle opening (18). second fluid jet (F2). The first fluid jet (F1) is designed to apply a bending moment to the burr (12) in one direction, while the second fluid jet (F2) is designed to apply a counterbending moment to the burr (12) in the opposite direction. As a result, an alternating bending load or a torsional load can be generated in a base region (14) of the burr (12) and the burr (12) can thereby be separated from the workpiece (11). The fluid tool (15) is driven in rotation about an axis of rotation (D). Superimposed on this rotational movement, a relative movement along a path (P) between the workpiece (11) and the fluid tool (15) can be generated, in particular along the extension of an edge (13) of the workpiece (11) or a burr (12 ).

Description

The invention relates to a device and a method for deburring a workpiece using fluid jets which are directed onto the burr or the edge of the workpiece in order to remove the burr.

Such a device or such a method is, for example, from DE 10 2007 006 661 B4 known. The fluid tool used has a plurality of nozzle openings for ejecting a jet of fluid in each case. The fluid jets are emitted in different ejection directions. The fluid tool is driven in rotation about an axis of rotation. The jets are discharged from the end of the fluid tool, with one of the jets being directed forward and the other jet being directed rearward. This should allow undercuts in a chamber to be machined with the jet jet directed backwards.

EP 2 716 374 A2 describes a device and a method for deburring a slender, elongate component that is rotated about an axis of rotation and processed by means of multiple liquid jets at different locations and/or in different orientations.

After machining, bores, groove-shaped indentations or other recesses in a component can have a burr on the edge that has to be removed. The known methods using one or more fluid jets for deburring require a very high fluid pressure of up to 1000 bar. A pump output must be correspondingly high in order to pressurize the fluid. The lack of energy efficiency has long been a criticism of fluidic deburring of workpieces.

It can therefore be seen as an object of the present invention to create a device and a method that provide effective fluidic deburring of a workpiece with improved energy efficiency.

This object is achieved by a device having the features of patent claim 1 and a method having the features of patent claim 8 .

The device according to the invention for deburring a workpiece has a fluid tool. A rotary drive of the device is set up to drive the fluid tool in rotation about an axis of rotation. A pressurized fluid is supplied to the fluid tool, the fluid preferably being a liquid such as water, a lubricant, cutting oil, or any combination thereof. The fluid is ejected as a jet of fluid through at least two nozzle orifices and is directed at the location on the workpiece where a burr is to be removed.

According to the invention, the fluid tool has at least one pair of nozzles. Each pair of nozzles has a first nozzle opening and a second nozzle opening. Optionally, in addition to the at least one pair of nozzles, further nozzle openings can also be present, so that the total number of nozzle openings can also be odd.

The first nozzle opening and the second nozzle opening of a common nozzle pair are arranged in the axial direction parallel to the axis of rotation with an axial spacing. Optionally, the first nozzle opening and the second nozzle opening of the common nozzle pair can also be arranged at a radial distance in the radial direction radially to the axis of rotation, the distance between the second nozzle opening and the axis of rotation preferably being greater than the distance between the first nozzle opening and the axis of rotation.

The first nozzle opening is set up to eject a first jet of fluid in a first ejection direction. The second nozzle opening is configured to eject a second jet of fluid in a second ejection direction. The first ejection direction is oriented obliquely rearward in the axial direction away from a front end of the fluid tool and also away from the axis of rotation. The second ejection direction is oriented obliquely forward in the axial direction toward the front end of the fluid tool and also toward the axis of rotation. In the direction of rotation about the axis of rotation, the first nozzle opening and the second nozzle opening or the first ejection direction and the second ejection direction enclose a phase angle. This means that the first or second fluid jet precedes the respective other fluid jet during a rotation.

This configuration makes it possible to act on a burr to be removed from opposite sides. By means of the first fluid jet, the burr can be subjected to a bending moment about a base area in one direction and by the second fluid jet to a counterbending moment about the base area in the respective other direction. It is thereby possible to separate the burr by alternating bending stress and/or torsional stress. It is essential that a temporal and/or spatial distance (phase shift) arises, with which a certain point of the burr is subjected to the bending moment and the counterbending moment, so that the moments do not compensate, but rather a Ver shaping and/or movement of the burr is generated. Alternating bending stress and/or torsional stress can be generated on the burr, thereby removing the burr from the edge of the workpiece.

In one embodiment, the ridge can be alternately bent in one direction and the opposite direction, which can be repeatedly performed by rotating the at least one pair of nozzles about the axis of rotation. Due to this alternating bending load, the burr is separated from the workpiece in the foot area.

Such alternating loading of the ridge takes place when the bending loading of the ridge by the first fluid jet and the bending loading of the ridge by the second fluid jet have a sufficiently large time interval or phase offset in time. This phase offset is determined, among other things, by the magnitude of the phase angle between the first ejection direction and the second ejection direction of the common pair of nozzles. In addition, the phase shift depends on the distance between the nozzle openings and the burr and the rotational speed of the nozzle pair around the axis of rotation. To achieve an alternating load, the time offset or phase offset of the action of the first fluid jet in one direction and the second fluid jet in the other direction on the burr must be sufficiently large so that the burr can actually perform a bending movement in one direction before being bent back in the opposite direction by the other fluid jet. Depending on the material and the geometry of the burr, the bending angle that the burr actually performs or should perform varies in size and the phase offset is set accordingly, for example by a suitable amount of the phase angle.

If the time offset or phase offset or the phase angle is selected so small that the first fluid jet and the second fluid jet hit the burr at a point in time essentially simultaneously or with a short time interval at a sufficiently small spatial distance, instead of an alternating bending load a torsional load can be generated in the root area of the ridge. The burr can also be severed from the workpiece by such a torsional load. The distance between the impact points of the first fluid jet and the second fluid jet on the ridge can be less than 10 mm, preferably less than 7 mm and more preferably less than 5 mm.

Irrespective of the choice of phase angle, the burr can be separated from the workpiece with fluid jets, with which a significantly lower pressure is sufficient for deburring. For machining aluminum workpieces, the fluid is supplied to the fluid tool, for example, at a pressure of less than 300 bar and preferably less than 100 bar. The pump output for generating the fluid pressure is correspondingly lower, which in turn results in significantly improved energy efficiency. The pressure required for deburring using the method according to the invention depends on the material of the workpiece. In all cases, however, the pressure is lower compared to conventional fluid processing for deburring the same material.

It is preferred if, superimposed on the rotation of the fluid tool about the axis of rotation, a relative movement between the fluid tool and the workpiece is carried out along a path, for example along an edge or groove of the workpiece. For this purpose, the device can have a positioning arrangement.

The positioning arrangement can have one or more machine axes for moving the fluid tool and/or one or more machine axes for moving the workpiece. The machine axes are linear axes, for example.

The first ejection direction encloses a preferably acute first angle with the axial direction. The second ejection direction encloses a preferably acute second angle with the axial direction. Depending on the application, the amounts of the angles are to be selected in such a way that the fluid jets actually hit the burr in the respective ejection directions and the desired loading or movement of the burr is achieved. The first angle and the second angle preferably have a different amount, with the first angle being smaller than the second angle in particular.

In a preferred embodiment, the first ejection direction and/or the second ejection direction are directed towards a part of the fluid tool. If the first fluid jet and/or the second fluid jet does not impinge on the workpiece or the burr or is blocked by other parts, it impinges on the fluid tool itself. This can prevent the fluid jet from damaging other parts of the fluid processing machine, in particular a working chamber or parts thereof. This is particularly important when the fluid tool repeatedly processes the same workpieces and thus executes the same movement. If the first fluid jet and/or the second fluid jet is/are not aimed directly at the workpiece at least temporarily, the working chamber or also other parts of the fluid processing machine could to be damaged. However, if the ejection direction is aimed directly at a part of the fluid tool itself, this part of the fluid tool can serve as an impact part, so to speak, and can be exchanged or renewed from time to time if necessary. The respective impact part of the fluid tool onto which the first fluid jet and/or the second fluid jet is directed can optionally be designed as a deflection part in order to deflect the fluid jet back onto the workpiece, possibly with less energy. As a result, a cleaning effect can be achieved on the workpiece, for example.

The first ejection direction and the second ejection direction are skewed to one another. If the phase angle were reduced to zero, so that the two ejection directions of a common pair of nozzles would be arranged in a common radial plane, the first ejection direction and the second ejection direction would preferably intersect. The point of intersection of the two ejection directions is located between the first nozzle opening and the second nozzle opening, viewed in the axial direction.

One of the exemplary embodiments of the device described above can be used for the method according to the invention for deburring a workpiece. For deburring, the fluid tool is rotated about the axis of rotation and the first fluid jet or the second fluid jet is ejected from the at least one pair of nozzles. Due to the phase angle in the direction of rotation, the fluid jets impinge on the burr to be removed temporally and/or spatially with a phase offset, for example sequentially in time or simultaneously at different spatial locations. As a result, the burr is subjected to a bending moment in one direction by means of the first fluid jet and a counterbending moment in the opposite direction by means of the second fluid jet.

Depending on the distance in space or time between the generation of the bending moment and the counterbending moment, different effects can be achieved for separating the flash:

If the time interval between the generation of the bending moment and the generation of the counterbending moment is sufficiently large, the burr to be removed is alternately bent in one direction and then in the other direction, so that an alternating bending load occurs. This alternating bending of the flash around the root region eventually results in the flash being severed. The number of bending movements required depends on the material, the geometry, the severity of the burr due to the previous machining of the workpiece and other parameters.

In addition or as an alternative, it is also possible to apply a torsional load to the burr by means of a pair of nozzles and thereby separate it. For this purpose, the phase angle is chosen to be sufficiently small, so that the two fluid jets impinge from opposite sides, at different points in the direction of extension of the burr, and thereby generate a torsional moment in the foot area. This method can preferably be used with non-metallic materials, for example with workpieces made of a plastic or a plastic composite material.

Due to the rotation of the fluid tool, it can preferably be moved along the burr to be removed or along the workpiece without reversing direction and/or preferably without stopping.

The rotational speed of the fluid tool during a rotation about the axis of rotation can be, for example, at least 100 revolutions per minute (1/min) and preferably at least 500 1/min or at least 1000 1/min.

During the removal of a burr, the first fluid jet and the second fluid jet are ejected from the nozzle openings intermittently or, in the exemplary embodiment, preferably without interruption (without intermittent discharge of the fluid jets).

The fluid jets can each be ejected with the same pressure, with different pressures and/or with pressures that vary over time. At least each nozzle opening can preferably be supplied with the fluid under the same pressure.

• 1 eine schematische perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Verfahrens bzw. einer erfindungsgemäßen Vorrichtung,
• 2 eine stark schematisierte Darstellung eines Düsenpaares eines Fluidwerkzeugs der Vorrichtung aus 1 in einer beispielhaften Drehstellung um eine Drehachse des Fluidwerkzeugs,
• 3 die stark schematisierte Darstellung des Düsenpaares aus 2 in einer anderen beispielhaften Drehstellung,
• 4 eine Prinzipdarstellung der Position einer ersten Düsenöffnung und einer zweiten Düsenöffnung eines Düsenpaares des Fluidwerkzeugs in Bezug auf die Rotationsrichtung um die Drehachse,
• 5 eine Prinzipdarstellung der Position einer ersten Düsenöffnung und einer zweiten Düsenöffnung bezogen auf die Rotationsrichtung des Fluidwerkzeugs um die Drehachse bei einem Ausführungsbeispiel mit zwei Düsenpaaren,
• 6 eine stark schematisierte Darstellung eines Düsenpaares entsprechend der 2 und 3 bei einem abgewandelten Ausführungsbeispiel des Fluidwerkzeugs und
• 7 das Wirkungsprinzip des Ausführungsbeispiels des Fluidwerkzeugs aus 6 bei der Einwirkung auf einen zu entfernenden Grat an einem Werkstück in einer Prinzipdarstellung.

Advantageous configurations of the invention result from the dependent patent claims, the description and the drawings. Preferred exemplary embodiments of the invention are explained in detail below with reference to the attached drawings. In the drawings show:

• 1 a schematic perspective representation of an embodiment of a method according to the invention or a device according to the invention,
• 2 a highly schematic representation of a pair of nozzles of a fluid tool of the device 1 in an exemplary rotational position about an axis of rotation of the fluid tool,
• 3 the highly schematic representation of the nozzle pair 2 in another exemplary rotational position,
• 4 a schematic representation of the position of a first nozzle opening and a second nozzle opening of a nozzle pair of the fluid tool in relation to the direction of rotation about the axis of rotation,
• 5 a schematic representation of the position of a first nozzle opening and a second nozzle opening in relation to the direction of rotation of the fluid tool about the axis of rotation in an embodiment with two pairs of nozzles,
• 6 a highly schematic representation of a pair of nozzles according to 2 and 3 in a modified embodiment of the fluid tool and
• 7 the principle of operation of the embodiment of the fluid tool 6 when acting on a burr to be removed on a workpiece in a schematic representation.

1 12 schematically illustrates an exemplary embodiment of a device 10 for deburring a workpiece 11. The workpiece 11 can have a burr 12 in the region of an edge 13 as a result of machining. The ridge 12 is highly schematic in the 2 , 3 , 6 and 7 illustrated. The burr 12 is connected to the edge 13 of the workpiece 11 in a foot region 14 . The workpiece 11 can consist of any desired material, for example a metallic material and/or a plastic material. A burr 12 can be present on one or more edges 13 depending on the previous processing.

The device 10 has a fluid tool 15 . The fluid tool 15 has at least one pair of nozzles 16 . Each pair of nozzles 16 has a first nozzle opening 17 and a second nozzle opening 18 . The fluid tool 15 is connected via at least one fluid line 19 to a fluid source 20 via which pressurized fluid can be supplied to the fluid tool 15 and ejected through the nozzle openings 17 , 18 . The fluid is in particular a liquid, for example water, lubricant or cutting oil. The fluid tool 15 is supplied with the fluid under a lower pressure. Due to the configuration according to the invention, the pressure can be lower for the same material or workpiece than was previously the case. For example, when deburring a workpiece 11 made of an aluminum alloy, a pressure of about a maximum of 200 bar or preferably a maximum of 100 bar may be sufficient, for which at least 300 bar was required with other deburring devices and deburring methods.

The fluid tool 15 extends in an axial direction A along an axis of rotation D to a front end 24. The fluid tool 15 is rotatably mounted about the axis of rotation D. It can be mounted, for example, on a tool carrier (not shown) that cannot be rotated about the axis of rotation D, by means of which the fluid tool 15 can optionally be moved and/or positioned in at least one degree of freedom relative to the workpiece 11 . The first nozzle opening 17 is arranged in the area of the front end 24 . The second nozzle opening 18 of the same nozzle pair 16 is located further away from the front end 24 in the axial direction and is at an axial distance c from the first nozzle opening 17 . The first nozzle opening 17 is at a first radial distance r1 from the axis of rotation D in a radial direction radial to the axis of rotation D, and the second nozzle opening 18 is at a second radial distance r2 from the axis of rotation D. The radial distances r1, r2 are of different sizes and, for example, the second radial distance r2 is greater than the first radial distance r1. Examples of the arrangement of the nozzle openings are in the 2-6 shown.

The fluid tool 15 can be essentially rod-shaped or lance-shaped. The rotating part of the fluid tool 15, which has the two nozzle openings 17, 18, is preferably designed to be balanced or capable of being balanced. For this purpose, at least the fluid tool 15 that can be rotated about the axis of rotation D can be configured such that it is configured identically or similarly on two diametrically opposite sides with respect to the axis of rotation D, so that it is either balanced or can be balanced very easily. At least in part, the fluid tool 15 can be rotationally symmetrical. In the illustrated embodiment, the second nozzle opening 18 of each nozzle pair 16 is arranged, for example, on a tool part 25 of the fluid tool 15 which—as described above—is balanced or can be balanced and in the embodiment has a rotationally symmetrical shape. The tool part 25 can, for example, have a cylindrical and preferably disk-like shape. The radius or the diameter of the tool part 25 is larger than the radius or the diameter of the fluid tool 15 in the area of the front end 24 and the first nozzle opening. In this way, the larger second radial distance r2 for arranging the second nozzle opening 18 can be achieved. The rotationally symmetrical design of the tool part 25 prevents imbalances when the fluid tool 15 rotates about the axis of rotation D.

In order to rotate the fluid tool 15 in a direction of rotation U about the axis of rotation D, the device 10 has a rotary drive 26 . In addition, the device 10 in the exemplary embodiment has a positioning arrangement 27 in order to generate a relative movement between the fluid tool 15 and the workpiece 11 along a path P. The web P can have any two-dimensional or three-dimensional shape. In the 1 The path P shown only as an example runs, for example, in different directions within a radial plane perpendicular to the axial direction A. The relative movement along the path P can, for example, extend along at least one edge 13 of the workpiece 11, on which a burr 12 to be removed can be located.

The positioning arrangement 27 can have one or more machine axes for moving the fluid tool. Additionally or alternatively, the positioning arrangement 27 can have one or more machine axes for moving the workpiece 11 . It is important that a relative movement between the workpiece 11 and the fluid tool 15 can be achieved by means of the positioning arrangement 27 .

A first fluid jet F1 is ejected from the first nozzle opening 17 of each nozzle pair 16 in a first ejection direction B1. A second fluid jet F2 is ejected in a second ejection direction B2 from the second nozzle opening 18 of the same nozzle pair 16 . The first ejection direction B1 is directed away from the front end 24 at an angle to the axial direction A and encloses a first angle α with the axial direction A. The second ejection direction B2 is directed forwards towards the front end 24 and encloses a second angle β with the axial direction A. The first angle α and the second angle β are each less than 90°. According to the example, the first angle α has an amount of 10° to 20°, preferably 15°. The second angle β can have an amount of 50° to 70°, preferably 60°. This alignment of the fluid jets F1, F2 and the ejection directions B1, B2 is shown schematically in FIGS 2 , 3 and 6 illustrated.

In the direction of rotation U about the axis of rotation D, the first nozzle opening 17 is offset from the second nozzle opening 18 of the same nozzle pair 16 at a phase angle φ, which is particularly evident from the 4 and 5 results. In the 4 and 5 the first nozzle opening 17 is symbolically illustrated by a circle with a dot and the second nozzle opening 18 by a circle with a cross. In these representations, the axis of rotation D runs at right angles to the plane of the drawing.

Alternatively, the phase angle φ between the first ejection direction B1 and the second ejection direction B2 can also be achieved by aligning the first ejection direction B1 and/or the second ejection direction B2 at an angle to a radial direction relative to the axis of rotation D. In this case, the first and the second nozzle opening 17, 18 can be arranged without offset in the direction of rotation U.

At the in 4 In the illustrated embodiment, the fluid tool 15 has a single pair of nozzles 16 . In this embodiment, the phase angle φ may be approximately 180° in one embodiment. The phase angle φ can also be larger or smaller than 180°. In the case of the example in 4 In the exemplary embodiment illustrated, the phase angle φ is more than 180° in relation to the direction of rotation U of the fluid tool 15 about the axis of rotation D. At a specified rotational speed of the fluid tool 15 about the axis of rotation D, based on the phase angle φ, there is a time interval at which the first fluid jet F1 and the second fluid jet F2 reach the same point of a burr 12 to be removed and apply a force or moment from opposite sides.

To remove a burr 12, the first fluid jet F1 applies a bending moment around the base region 14 in one direction and the second fluid jet F2 applies a counterbending moment around the base region 14 in the opposite direction. Depending on the time and/or spatial distance (phase shift) with which a specific point on the ridge 12 is subjected to the bending moment and the counterbending moment, an alternating bending load and/or a torsional load can be generated on the ridge 12 and the ridge 12 can thereby be separated from the edge 13 of the workpiece 11 are removed.

As exemplified in the 2 and 3 is illustrated, an alternating bending stress of the fin 12 can be achieved by a sufficiently large phase angle φ, which is, for example, greater than 45° or greater than 90° or greater than 160°. Alternating bending stress on the burr 12 occurs when the first fluid jet F1 and the second fluid jet F2 impinge on the burr 12 with a temporal phase offset, so that the burr 12 has sufficient time to move in one direction due to the impingement of the first fluid jet F1 and to bend around its foot area 14 in the respective other direction by being acted upon by the second fluid jet F2. The ridge 12 is bent around the root portion 14 away from the front end 24 of the fluid tool 15 by the first fluid jet F1 and in this state offers a Target surface for the second fluid jet F2 which subsequently strikes. The second fluid jet F2 bends the burr 12 around the foot area 14 away from the tool part 25 in the direction of the front end 24, so that the burr 12 again offers a contact surface for the first fluid jet F1. Due to the rotation of the fluid tool 15 about the axis of rotation D, the burr 12 is alternately bent backwards and forwards around the foot area 14 until it finally breaks off the workpiece 11 . The number of alternating bending loads required to remove the burr 12 depends on the specific application, e.g. the material of the workpiece 11, the previous machining, the thickness of the burr 12, etc.

As an alternative to this, the phase angle φ can also be selected to be smaller. With sufficiently small amounts of the phase angle φ (greater than zero), the first fluid jet F1 and the second fluid jet F2 impinge on opposite sides of the burr 12 to be removed at a short spatial distance and a short time distance or simultaneously and thereby cause a torsional load in the foot region 14. The burr 12 is separated from the edge 13 or the workpiece 11 by this torsional force.

With amounts of the phase angle φ of in particular a maximum of 90°, several pairs of nozzles 16 can also be arranged on the fluid tool, as is exemplified in 5 is illustrated. In principle, however, a pair of nozzles 16 is sufficient. Two or more than two pairs of nozzles 16 are optional.

The rotational speed of the fluid tool 15 and consequently of the at least one pair of nozzles 16 about the axis of rotation D can, for example, be at least 200 or 300 revolutions per minute (1/min) and up to 1400 1/min. The path speed thus achieved by the pair of nozzles 16 on the path of movement around the axis of rotation D is significantly greater than the speed of the relative movement between the workpiece 11 and the fluid tool 15 along the path P, which is, for example, less than 100 cm/s or less than 50 cm/s. s.

The invention relates to a device 10 and a method for removing a burr 12 from a workpiece 11 using a first fluid jet F1 ejected from a first nozzle opening 17 and a second fluid jet F2 ejected from a second nozzle opening 18 . The first fluid jet F1 is configured to apply a bending moment to the ridge 12 in one direction, while the second fluid jet F2 is configured to apply a counterbending moment to the ridge 12 in the opposite direction. As a result, an alternating bending load or a torsional load can be generated in a foot region 14 of the burr 12 and the burr 12 can be separated from the workpiece 11 as a result. The first nozzle opening 17 and the second nozzle opening 18 of each nozzle pair 16 are arranged at an axial distance c parallel to an axis of rotation D about which the fluid tool 15 is rotatably driven. Superimposed on this rotational movement, a relative movement can be generated along a path P between the workpiece 11 and the fluid tool 15, in particular along the extension of an edge 13 of the workpiece 11 or of a burr 12 to be removed.

Reference List

10

contraption

11

workpiece

12

ridge

13

edge

14

footer

15

fluid tool

16

nozzle pair

17

first nozzle opening

18

second nozzle opening

19

fluid line

20

fluid source

24

front end of the fluid tool

25

tool part

26

rotary drive

27

positioning arrangement

a

first angle

β

second angle

φ

phase angle

A

axial direction

B1

first ejection direction

B2

second ejection direction

c

axial distance

D

axis of rotation

F1

first fluid jet

F2

second fluid jet

P

Rail

r1

first radial distance

r2

second radial distance

u

direction of rotation

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102007006661 B4 [0002]
• EP 2716374 A2 [0003]

Claims (13)

Device (10) for deburring a workpiece (11), having a fluid tool (15) and a rotary drive (26) which is set up to drive the fluid tool (15) in rotation about an axis of rotation (D), wherein the fluid tool (15) has at least one pair of nozzles (16) having a first nozzle opening (17) and a second nozzle opening (18) which are arranged in an axial direction (A) parallel to the axis of rotation (D) at an axial distance (c) from one another are, wherein the first nozzle opening (17) is set up to eject a first fluid jet (F1) in a first ejection direction (B1) obliquely backwards relative to the axial direction (A) and away from the axis of rotation (D), and wherein the second nozzle opening (18 ) is set up to eject a second fluid jet (F2) in a second ejection direction (B2) obliquely forward relative to the axial direction (A) and to the axis of rotation (D), the first ejection direction (B1) and the second ejection direction (B2) enclose a phase angle (φ) in a direction of rotation (U) about the axis of rotation (D). device after claim 1 , comprising a positioning arrangement (27) which is adapted to generate a relative movement between the workpiece (11) and the fluid tool (15) along a path (P). device after claim 1 or 2 , wherein the first ejection direction (B1) encloses a first angle (α) with the axial direction (A) and wherein the second ejection direction (B2) encloses a second angle (β) with the axial direction (A), the first angle (α) and the second angle (β) has a magnitude of 0° to 90°. device after claim 3 , wherein the magnitude of the first angle (α) and the magnitude of the second angle (β) are essentially equal. device after claim 3 or 4 , wherein the magnitudes of the first angle (α) and the second angle (β) are based on possible positions of the ridge (12), the possible positions of the ridge (12) being influenced by the action of the fluid jets (F1, F2). Device according to one of the preceding claims, wherein the first ejection direction (B1) and/or the second ejection direction (B2) is also directed towards an impact part or deflection part of the fluid tool (15). Device according to one of the preceding claims, wherein the first nozzle opening (17) has a first radial distance (r1) from the axis of rotation (D) and wherein the second nozzle opening (18) has a second radial distance (r2) from the axis of rotation (D) which is different from the first radial distance (r1). Method for deburring a workpiece (11) using a device (10) having a fluid tool (15) which can be driven in rotation about an axis of rotation (D) and which has at least one pair of nozzles (16) having a first nozzle opening (17) and a second nozzle opening (18 ) which are arranged in an axial direction (A) parallel to the axis of rotation (D) at an axial distance (c) from one another, wherein during the rotation of the fluid tool (15) about the axis of rotation (D), a first fluid jet (F1) is ejected from the first nozzle opening (17) in a first ejection direction (Al) onto a burr (12) to be removed on the workpiece (11). , so that the burr (12) is subjected to a bending moment around a foot area (14), wherein during the rotation of the fluid tool (15) about the axis of rotation (D), a second fluid jet (F2) is ejected from the second nozzle opening (18) in a second ejection direction (A2) onto the burr (12) to be removed on the workpiece (11). , so that the burr (12) around the foot area (14) is subjected to a counterbending moment directed opposite to the bending moment, and wherein the first ejection direction (B1) and the second ejection direction (B2) enclose a phase angle (φ) in a direction of rotation (U) about the axis of rotation (D). procedure after claim 8 , wherein the first fluid jet (F1) and the second fluid jet (F2) successively impinge on a section of the burr (12) to be removed from opposite sides. procedure after claim 8 or 9 , wherein the first fluid jet (F1) and the second fluid jet (F2) impinge on the burr (12) essentially simultaneously with a spatial distance of at most 10 mm, so that a torsion effect occurs on the foot region (14) of the burr (12) to be removed is produced. procedure after claim 8 or 9 , wherein the bending moment generated by the first fluid jet (F1) and the counterbending moment generated by the second fluid jet (F2) act on the same point on the burr (12) at a time interval, so that an alternating bending load on the foot area (14) of the burr to be removed (12) is generated. Procedure according to one of Claims 8 until 11 , wherein the first fluid jet (F1) and/or the second fluid jet (F2) are ejected without interruption during the deburring. Procedure according to one of Claims 8 until 12 , wherein the first ejection direction (B1) is oriented obliquely backwards relative to the axial direction (A) and away from the axis of rotation (D), and wherein the second ejection direction (B2) is oriented obliquely forwards relative to the axial direction (A) and to the axis of rotation (D) is oriented towards.

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