Holder for a deburring tool, tool arrangement and method for its use

Abstract

A holder (3) for a deburring tool (2) comprises a housing comprising a drive-side housing part (8) with a drive-side end and a tool-side housing part (7), wherein the tool-side housing part (7) is deflectable along a tool rotation axis (1) from a rest position in a compression direction towards the drive-side end and in a tension direction away from the drive-side end, a first spring (28) which, when the tool-side housing part (7) is deflected from its rest position in the compression direction, exerts a first restoring force on it in the direction of the rest position, and a second spring (29) which, when the tool-side housing part (7) is deflected from its rest position in the direction of tension, exerts a second restoring force on it in the direction of the rest position. The tension of the first spring (28) remains unchanged when the tool-side housing part (7) is deflected from the rest position in the tensile direction over at least part of the distance traveled during the deflection, and the tension of the second spring (29) remains unchanged when the tool-side housing part (7) is deflected from the rest position in the compression direction over at least part of the distance traveled during the deflection. The amount (F V ) the first restoring force when deflected by a given amount (s) in the compression direction and the magnitude of the second restoring force (F R ) when deflected by the given measure (s) in the direction of travel, they differ from each other by at least 50% of the smaller of the two amounts.

Description

[0001] The present invention relates to a holder for a deburring tool, a tool arrangement in which a holder and a deburring tool are connected to each other, and a method for workpiece machining in which the holder or the tool arrangement is used.

[0002] From DE 10 2021 1119 286 A1, a holder for a deburring tool is known in which a tool-side end of the holder is axially deflectable relative to a drive-side end from a rest position in a tensile direction and a compressive direction. The rest position is defined by an equilibrium between two springs, one of which exerts a force in the tensile direction and the other a force in the compressive direction on the tool-side end. The tension of the springs in the rest position is adjustable by adjusting the distance between two flanges of a tool-side housing part of the holder; however, as long as the springs have a linear characteristic, the distance between the flanges changes, at most, the freedom of movement of the tool-side housing part in the direction of the axis and the force exerted by a single spring on the tool-side housing part, but not the sum of the forces exerted by the two springs.If the tool is to exert significantly different forces on a workpiece in different work steps, this is only possible with correspondingly different deflections from the rest position, whereby there is a risk that at high forces the limits of freedom of movement will be reached and the resulting abrupt force fluctuations will lead to damage to the workpiece or tool, or the springs have to be changed between work steps, which significantly increases the workload.

[0003] One object of the invention is therefore to create a holder for a deburring tool or a deburring arrangement that allows safe operation at different values ​​of the force exerted on the workpiece and a quick change between operations with different force inputs.

[0004] The task is solved by using a holder for a deburring tool with a housing comprising a drive-side housing part with a drive-side end and a tool-side housing part, wherein the tool-side housing part is deflectable along a tool rotation axis from a rest position in a compression direction towards the drive-side end and in a tension direction away from the drive-side end, a first spring which, when the tool-side housing part is deflected from its rest position in the compression direction, exerts a first restoring force on it in the direction of the rest position, and a second spring which, when the tool-side housing part is deflected from its rest position in the direction of pull, exerts a second restoring force on it in the direction of the rest position, the tension of the first spring remains unchanged during a deflection of the drive-side end from the rest position in the direction of pull over at least part of the distance traveled during the deflection, the tension of the second spring remains unchanged during a deflection of the drive-side end from the rest position in the compression direction over at least part of the distance traveled during the deflection, and The magnitude of the first restoring force when deflected by a given amount in the compression direction and the magnitude of the second restoring force when deflected by the given amount in the tension direction must differ from each other by at least 50% of the smaller of the two amounts.

[0005] To limit the deflection from the rest position required to exert a desired force on the workpiece, the preload under which the first and / or second spring is in the rest position should be greater than zero.

[0006] The preload of the first and / or second spring can also be adjusted using a setscrew. This does not preclude the setscrew from being in a position where the preload disappears; however, this will generally not be adjusted when the holder is in use.

[0007] Preferably, the adjusting screw is rotatable around the tool's axis of rotation and accessible via an opening in the tool-side housing part; this protects it from unintentional adjustment.

[0008] Preferably, the opening through which the adjusting screw is accessible also serves as a receptacle for the shaft of the deburring tool. This prevents access to the adjusting screw once the deburring tool is mounted on the holder.

[0009] Preferably, each of the first and second springs is assigned an adjusting screw.

[0010] In order for both adjusting screws to be accessible and adjustable through the opening, one of the adjusting screws can have an axial passage through which the second adjusting screw is accessible to a tool associated with the second adjusting screw.

[0011] Preferably, the axial passage has a non-circular cross-section into which a tool associated with the first adjusting screw can be inserted with torque engagement.

[0012] For example, the second screw may have a small-diameter internal hexagon contour into which the first tool can engage through the axial passage, and the axial passage itself forms a larger-diameter internal hexagon contour so that the first tool can rotate in the passage without taking the first adjusting screw with it, and to adjust the first adjusting screw, a second tool of a larger diameter than the first can engage in the internal hexagon contour of the first adjusting screw.

[0013] To guide the movement of the housing parts against each other, one drive-side and tool-side housing part can form a plug section and the other a socket section that can receive the plug section in an axially displaceable manner.

[0014] To keep the tension of the first spring constant when deflected from the rest position in the direction of pull, it is sufficient, for example, to provide a stop that comes into contact with one end of the first spring instead of the drive-side end as soon as the drive-side end is deflected beyond the rest position in the direction of pull.

[0015] Accordingly, the tension of the second spring can be kept constant when deflected from the rest position in the compression direction by providing a stop that comes into contact with one end of the second spring instead of the drive-side end as soon as the drive-side end is deflected beyond the rest position in the compression direction.

[0016] The connector section may be hollow, and both springs may extend at least partially within the connector section.

[0017] According to a preferred embodiment, the constant tension of the first and / or second spring is made possible by a slider which, in the rest position, is held against the drive-side housing part by one of the springs and against the tool-side housing part by the other of the springs.

[0018] The slider preferably comprises a tubular sleeve, a stop directed radially inwards from the sleeve against which one of the springs is preloaded, and a stop directed radially outwards against which the other of the springs is preloaded.

[0019] The second adjusting screw may have a screw head and a shaft that engages in a thread of one of the housing parts and is surrounded by the slider, and one of the springs may be held between the head and a radially inwardly directed stop of the sleeve.

[0020] The first adjusting screw can be designed as a setscrew, and another of the springs can be held between the setscrew and a stop of the slider facing the setscrew, optionally extending radially outwards from the sleeve.

[0021] The problem is further solved by a deburring arrangement with a holder as described above and a deburring tool mounted at the tool-side end of the holder. The deburring tool has a front working surface facing away from the holder in the direction of the tool's axis of rotation and a rear working surface facing the holder. The front working surface can be compressed by engaging a workpiece, and the rear working surface can be extended by engaging a workpiece. Thus, with essentially the same deflection of the tool from its rest position in the compression or tension direction, the front and rear working surfaces can exert significantly different machining forces on a workpiece.

[0022] Another task is to create a workpiece machining process that enables efficient deburring despite different burr thicknesses on the front and back of a tool.

[0023] The task is solved by a method for machining a workpiece with a front and a back side, with the following steps: - Removing part of the workpiece by applying local pressure to the front, thereby forming a narrow side of the workpiece which meets the front at a front edge and the back at a rear edge; - Deburring the front edge and the rear edge with the tool arrangement as described above, wherein when deburring the front edge the tool is deflected from the rest position in a first direction in which the restoring force at deflection by a given amount is smaller than at deflection in an opposite second direction, and when deburring the rear edge the tool is deflected from the rest position in the second direction.

[0024] To simplify the programming of the process on a program-controlled machine tool, the coordinates of machining paths followed by the tool when deburring the front and back sides should be identical perpendicular to the axis.

[0025] The different restoring forces acting on the front and back sides due to the differing properties of the first and second springs allow the thicker burr to be machined with greater force; therefore, the difference in the tool feed rates along the machining paths when deburring the front and back edges can be kept small. Preferably, the two feed rates differ from each other by no more than 50% of the lower rate.

[0026] Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures. These show: Fig. 1 an axial section through a deburring arrangement according to the invention in rest position; Fig. 2 an axial cut through the deburring arrangement in a position extended to a stop; Fig. 3. An axial cut through the deburring arrangement in a compressed position up to a stop; Fig. 4 a typical characteristic curve of the restoring force acting on the tool as a function of the deflection from the rest position; Fig. 5 a radial section through the deburring assembly; and Fig. 6 a deburring process.

[0027] Fig. Figure 1 shows the deburring arrangement according to the invention in a rest position assumed automatically without contact with a workpiece in a section along a tool rotation axis 1. The deburring arrangement comprises a deburring tool 2 and a holder 3 therefor.

[0028] The head of the deburring tool 2 comprises a front working surface 4 facing away from the holder 3 and a rear working surface 5 facing the holder 3. The working surfaces 4 and 5 are essentially conical or frustoconical in shape and are each provided with a plurality of radially and axially extending cutting edges. A shaft 6 of the deburring tool 2 extending from the rear working surface 5 is detachably and rotationally fixed and axially immovable in a tool-side housing part 7 of the holder 3.

[0029] The tool-side housing part 7 and the deburring tool 2 are connected to a drive-side housing part 8 of the holder 3 in a rotationally fixed but axially deflectable manner. The drive-side housing part is designed for mounting on a head of a machine tool (not shown) that is adjustable and rotatable in three spatial directions. Thus, by moving the head in a direction parallel to axis 1, a contact force exerted by the deburring tool 2 on a workpiece (not shown) in the direction of axis 1 can be adjusted, and by moving the head in a plane perpendicular to axis 1, an edge of the workpiece to be deburred can be traced. Relative location terms such as "proximal" and "distal" are used here with reference to this head.

[0030] The tool-side housing part 7 is essentially tubular. A passage 9 extending along the axis 1 through the housing part 7 has a distal section in which the shank 6 of the deburring tool 2 is detachably received, and a proximal section 13 with an internal thread in which a setscrew 10 is held.

[0031] The setscrew 10 has a hexagonal recess 11 on its end face facing the deburring tool 2. With the deburring tool 2 removed, an Allen key can be inserted into this recess and turned to axially adjust the setscrew 10. A cylindrical bore 12 extends from an inner end of the hexagonal recess 11 to an end face facing away from the deburring tool 2. The diameter of the bore 12 is smaller than the distance between opposing flat surfaces of the hexagonal recess 11, allowing a second Allen key with a smaller cross-section to be inserted through the bore 12 into a rearward portion of the proximal section 13 and turned about the axis 1 without turning the setscrew 10.

[0032] At one end of the housing part on the side of the tool facing away from the tool 2, the passage 9 is narrowed by a radially inwardly directed, preferably ring-shaped, circumferential projection 14.

[0033] A slider 15 comprises a cylindrical sleeve 16, a radially outwardly directed projection 17 at a distal end of the sleeve 16 facing the tool 2, and a radially inwardly directed projection 17 at a proximal end of the sleeve 16 facing away from the tool 2.

[0034] The drive-side housing part 8 comprises a base body 19 of a substantially cylindrical outer shape and a pipe section 20 that is pushed onto and attached to a distal end of the base body 19. The attachment can be permanent, e.g., a welded or soldered connection; preferably, it is detachable, e.g., in the form of a snap ring or a wire clip, the legs of which extend on both sides of the tool's axis of rotation 1 and engage in circumferentially extending grooves (not shown in the figures) of the base body 19 and the pipe section 20.

[0035] A bore 21 extending proximally from a distal end of the housing part 8 gives the housing part 8 the shape of a socket into which the tool-side housing part 7 engages axially displaceably, like a plug. A threaded bore is formed at the bottom of the bore 21, into which a shaft 23 of an adjusting screw 22 engages. The head 24 of the adjusting screw 22 is provided on one side facing the setscrew 10 with a hexagonal recess (not shown in the figure for clarity). This hexagonal recess is dimensioned to accommodate the aforementioned second Allen key in a rotationally fixed manner, so that the adjusting screw 22 can be adjusted in the direction of axis 1 by turning this second Allen key.

[0036] As in Fig. As can be seen in Figure 4, elongated holes 25 oriented in the direction of axis 1 are formed in the base body 19. Each elongated hole 25 overlaps with a groove 26 on an outer side of the tool-side housing part 7. The elongated hole 25 and the groove 26 each receive a ball 27, the engagement of which blocks rotation of the housing parts 7 and 8 relative to each other about axis 1 and simultaneously limits the axial freedom of movement of the housing parts 7 and 8 relative to each other, ensuring that the engagement of the tool-side housing part 7 with the drive-side housing part 8 cannot be lost. The balls 27 are secured in their respective positions by the tube section 20, which is slid over the elongated holes 25 after the balls 27 have been inserted, thus securing the balls 27 axially movable but captive within the elongated holes 25.

[0037] A compression-loaded helical spring 28 is supported with one of its ends on the proximal end face of the setscrew 10 and with the other on a distal side of the projection 17 at the distal end of the slider 15, thus driving the slider proximally and the tool-side housing part 7 distally apart until the projections 14 and 17 abut each other.

[0038] By bearing against a proximal side of the head 24 of the adjusting screw 22 on one side and against the projection 18 of the slider 15 on the other, a further compression-loaded helical spring 29 keeps the projection 18 in contact with the bottom of the bore 21.

[0039] Fig. Figure 2 shows the deburring arrangement with a deburring tool 2 positioned on the back side 31 of a workpiece 30. For the sake of clarity, in this figure, as well as in Fig. 3 the springs 28, 29 are each represented only by their cross-sectional areas lying in the section plane.

[0040] A hole 33 is formed in the workpiece 30 by applying pressure to its front surface 32 using a tool such as a punch or a drill. As a result of the pressure, the leading edges 34, where a narrow side 35 created by the punching meets the front surface 32, are already slightly blunted, whereas the trailing edges 36 project beyond the plane of the back surface 31 between the narrow and back surfaces 34, 31. To reach its position on one of the trailing edges 34, as shown in the figure, the head of the machine tool was first moved distally, so that the deburring tool 2, as illustrated by a dashed line 37, was initially inserted proximally into the hole 33 from the front surface 32, parallel to the axis 1.Once its rear working surface 5 reaches the height of the edge 34 to be machined, the head and the deburring assembly are moved transversely to the axis 1 until the rear working surface 5 abuts the edge 34. Subsequent proximal movement of the machine tool head is limited to the drive-side housing part 8 of the holder 3; the deburring tool 2 and, with it, the tool-side housing part 7 remain caught on the edge 34. This causes the slider 15 to move away from the bottom of the bore 21, and the spring 29 is increasingly compressed between the projection 18 and the screw head 24, thereby increasing the force with which the rear working surface 5 presses against the edge 34.

[0041] Fig. Figure 2 shows the deburring tool 2 and the tool-side housing part 7 in a maximally extended position, moved a distance s from the rest position. dIn the deflected position: a stop position is defined by the fact that the ball 27 is simultaneously located at the distal end of the elongated hole 25 and at the proximal end of the groove 26. The stop position is not ideal for machining the edge 36, as irregularities in the edge 36 can cause strong and abrupt fluctuations in the contact force. In a position suitable for machining the edge 36, the deburring tool 2 should be deflectable both distally and proximally, i.e., the deflection path s must be smaller than s. d , and the dependence of the pressing force F acting on the back side 36 R of the deflection path s, i.e. the spring constant k=dF R / ds should not be too large so that irregularities on edge 36 do not cause excessive fluctuations in the contact force F. R effect; at the same time, however, the deflection s from the rest position, which is necessary to achieve a suitable value of the contact force F, should be RThe required diameter should not be too large, as a long deflection path necessitates a bulky and unwieldy holder and increases the time required to adjust the clamping force. The holder 3 shown here allows both requirements to be met by selecting a spring with a suitable spring constant as spring 29 and adjusting it to such a value F by turning the adjusting screw 22. R0 It is pre-tensioned so that the desired value of the contact force F is reached. R The spring 29 only needs to be compressed further by a predetermined deflection s.

[0042] Fig. 3 shows the holder 3 in a compressed state caused by contact between the front working surface 4 of the tool 2 and the front surface 32 of the workpiece 30. The position of the slider 15 is the same as in Fig. 1, accordingly, the spring 29 presses the screw head 24 and the slider 15 with the same force F R0apart, which, however, does not affect the force Fv with which the tool 2 presses against the edge 34 of the workpiece 30. This force F V is generated by the spring 28 located between the setscrew 10 and the projection 17 of the slider 15 and increases the further the projections 14 and 17 of the tool-side housing part 7 and the slider 15 are moved apart. In the configuration of the Fig. 3 is the tool-side housing part 7 from the rest position by the distance s v deflected and has reached the bottom of bore 22. Spring 28 is maximally compressed. The working position is again a position between the in Fig. 1 and Fig. The 3 shown were chosen to allow movement of the tool 2 proximally and distally during deburring.

[0043] The path -s by which the tool-side housing part 7 is deflected from its rest position in this working position is equal to and opposite to the deflection path s in the working position of the rear working surface 5. Since deburring the front edge 34 requires less material removal than deburring the rear edge 36, a smaller amount of the contact force F is sufficient. V , in order to machine the leading edge 36 with the same tool feed rate as the trailing edge. If the spring constant of the spring 28 is predetermined, the preload F can be adjusted using the setscrew 10. V0 so that, for a deflection by the distance -s, the desired contact force F is achieved. V is achieved.

[0044] Fig. Figure 4 illustrates this with a diagram showing the restoring force F exerted by springs 28 and 29 as a function of the deflection. In the rest position, the deflection is zero, and the restoring force is also zero; the housing parts 7 and 8 do not move relative to each other. The holder 3 only yields to a proximally directed force on the tool 2 when this force is greater than F. V0 , and with increasing displacement, the restoring force increases according to the spring constant of spring 28, so that at a displacement of -s the restoring force F V This is the case. Accordingly, the holder 3 does not yield to a force in the pulling direction until this force is greater than F. R0 , and at a deflection of s, the restoring force reaches the value F R .

[0045] Fig. Figure 5 illustrates a few construction details of the holder 3 using a radial section along the plane VV of the Fig. 1. It can be seen here that several, preferably three, elongated holes 25, grooves 26, and balls 27 are distributed around the circumference of the holder 3 to prevent the housing parts 7, 8 from tilting relative to each other when the end of their relative freedom of movement is reached. Between two grooves 26 of the tool-side housing part 7, a channel 37 extends axially into the bore 21 to a proximal end face 38 of the housing part 7 (sa Fig. 2) The base body 19 is locally flattened on its outer circumference to form channels 39 between the base body 19 and the pipe section 20, which communicate with the channels 37 and allow pressure equalization between the interior of the bore 21 and the environment when the housing parts 7,8 move against each other.

[0046] Inside the hollow base body 19, the head 24 of the adjusting screw 22 can be seen, with a hexagonal recess for receiving an Allen key.

[0047] Holder 3 is disassemblable. The setscrew 10 can be unscrewed from passage 9; this releases the spring 28, allowing it to be removed or replaced. Once spring 28 is removed, head 24 is also exposed, and adjusting screw 22 can be loosened. This makes it possible to remove spring 29 through passage 9 after adjusting screw 22 is removed, and / or to separate housing parts 7 and 8.

[0048] Fig. Figure 6 illustrates the deburring process on workpiece 30 in a top view of its front surface 32. Based on the shape of the hole 33, a machining path 40 is constructed in two spatial directions orthogonal to axis 1 such that axis 1 always passes through the hole 33 along this path and maintains a constant distance d from the edge 34. The distance d is greater than the radius of the shank 6 and smaller than that of the working surfaces 4, 5 of the tool 2. The machine tool positions the tool 2 above the front surface 32 so that its axis 1 lies at a point on the machining path 40, lowers the tool 2 and the holder 3 until the holder 3 is compressed by -s and the contact force F is reached. VThe tool 2 acts on edge 34 and then travels along the machining path 40 at a predetermined feed rate to deburr edge 34. Once this is complete, the machine tool moves the tool 2 away from edge 34, for example along a path segment 41, so that it can pass through the hole, and then moves it downwards until the working surfaces 4, 5 are located beyond the back side 31 of the workpiece 30. The tool 2 is then moved back along the machining path 40 and raised until the holder is extended by s and the working surface 5 is machined with the force F. R on the (in Fig. 6) The invisible trailing edge 36 is pressed. Now, using the same program, with the same feed rate and the same tool speed as before, possibly offset in the direction of the tool rotation axis 1, the machine tool can guide the tool 2 a second time along the machining path 40 and thus deburr the trailing edge 36. Reference sign 1 Tool rotary axis 2 Deburring tools 3 holders 4 front work surface 5 rear work surface 6 shaft 7 tool-side housing part 8 drive-side housing part 9th round 10 grub screws 11 Hexagonal recess 12 bore 13 heads 14 lead 15 gliders 16 Sleeve 17 lead 18 lead 19 basic shapes 20 pipe section 21 bore 22 adjusting screw 23 shaft 24 heads 25 slotted holes 26 groove 27 balls 28 coil spring 29 coil spring 30 workpieces 31 Back 32 Front 33 holes 34 Front edge 35 Narrow side 36 trailing edge Channel 37 38 Front surface Channel 39 40 Processing path 41st section of the route QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2021 1119 286 A1

[0002]

Claims

[1] Holder (3) for a deburring tool (2), with a housing comprising a drive-side housing part (8) with a drive-side end and a tool-side housing part (7), wherein the tool-side housing part (7) is deflectable along a tool rotation axis (1) from a rest position in a compression direction towards the drive-side end and in a tension direction away from the drive-side end, a first spring (28) which, when the tool-side housing part (7) is deflected from its rest position in the compression direction, exerts a first restoring force on it in the direction of the rest position, and a second spring (29) which, when the tool-side housing part (7) is deflected from its rest position in the direction of tension, exerts a second restoring force on it in the direction of the rest position, characterized by , that the tension of the first spring (28) remains unchanged during a deflection of the tool-side housing part (7) from the rest position in the direction of pull over at least part of the distance traveled during the deflection, the tension of the second spring (29) remains unchanged during a deflection of the tool-side housing part (7) from the rest position in the compression direction over at least part of the distance traveled during the deflection, and the amount (F V ) the first restoring force when deflected by a given amount (s) in the compression direction and the magnitude of the second restoring force (F R ) when deflected by the given measure (s) in the direction of travel, they differ from each other by at least 50% of the smaller of the two amounts. [2] Holder according to claim 1, wherein one preload (F R0 ,F V0), under which the first and / or second spring (28, 29) is in the rest position, is greater than zero and / or is adjustable by means of an adjusting screw (10, 22). [3] Holder according to claim 2, wherein the adjusting screw (10, 22) is rotatable about the tool rotation axis (1) and accessible via an opening (9) of the tool-side housing part (7), wherein optionally the opening (9) forms a receptacle for a shaft (6) of the deburring tool (2). [4] Holder according to claim 2 or 3, wherein a set screw (10, 22) is assigned to each of the first and second springs (28, 29), and a first set screw (10) has an axial passage (11, 12) through which the second set screw (22) is accessible to a tool assigned to the second set screw (22), wherein optionally the axial passage (11, 12)) has a section (12) with a non-circular cross-section into which a tool assigned to the first set screw (10) can be inserted with torque engagement. [5] Holder according to one of the preceding claims, wherein the drive-side and tool-side housing part (8, 7) forms a plug section and the other a socket section which receives the plug section axially displaceably. [6] Holder according to claim 5, wherein the plug section is hollow and both springs (28, 29) extend at least partially within the plug section. [7] Holder according to claim 5 or 6, further comprising a slider (15) which in the rest position is held in the stop by one of the springs (19) against the drive-side housing part (8) and by the other of the springs (29) against the tool-side housing part (7). [8] Holder according to claim 7, insofar as it refers back to claim 6, wherein the slider (15) comprises a tubular sleeve (16), a stop (18) directed radially inwards from the sleeve (16) against which one of the springs (29) is biased, and a stop (17) directed radially outwards against which the other of the springs (28) is biased. [9] Holder according to one of claims 7 or 8, insofar as it relates back to claim 4, wherein the second adjusting screw (22) has a screw head (24) and a shaft (23) which engages in a thread of one of the housing parts (8) and is surrounded by the slider (15), and wherein one of the springs (29) is held between the head (24) and a radially inwardly directed stop (18) of the slider (15). [10] Holder according to one of claims 6 to 8, insofar as it refers back to claim 4, or claim 9, wherein the first adjusting screw (10) is designed as a setscrew and wherein one of the springs (28) is held between the setscrew (10) and a stop (17) of the slider (15) facing the setscrew (10). [11] Deburring arrangement with a holder (3) according to one of the preceding claims and a deburring tool (2) mounted at the tool-side end of the holder (3), wherein the deburring tool (2) has a front working surface (4) facing away from the holder (3) in the direction of the tool rotation axis (1) and a rear working surface (5) facing the holder (3) and the holder (3) is compressible by engagement of the front working surface (4) with a workpiece (30) and expandable by engagement of the rear working surface (5) with a workpiece (30). [12] Method for machining a workpiece (30) having a front (32) and a back (31), comprising the steps: - Removing part of the workpiece by applying local pressure to the front, thereby forming a narrow side (35) of the workpiece (30) which meets the front (32) at a front edge (34) and the back (31) at a rear edge (36); - Deburring the front edge (34) and the rear edge (36) with the tool arrangement according to claim 11, wherein when deburring the front edge (34) the tool (2) is deflected from the rest position in a first direction in which the restoring force (F) V ) when deflected by a given amount (s) is smaller than the restoring force (F) R ) when deflected by the given dimension (s) in an opposite second direction, and when deburring the trailing edge (36) the tool is deflected from the rest position in the second direction. [13] Method according to claim 12, wherein the coordinates of machining paths (40) followed by the tool (2) when deburring the front edge (34) and the rear edge (36) are identical transverse to the tool rotation axis (1), and the feed rates of the tool (2) when deburring the front edge (34) and when deburring the rear edge (36) differ from each other by at most 50% of the smaller of the two feed rates.

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