DEVICE FOR DETACHING AT LEAST ONE BURR FROM AN OPENING OF AT LEAST ONE TRANSVERSE BORE-HOLE OF A WORKPIECE, DRILLING STATION HAVING THE DEVICE AND METHOD FOR DETACHING THE AT LEAST ONE BURR USING THE DRILLING STATION

Abstract

A device for detaching a burr from an opening of a transverse borehole of a workpiece includes an elongate shank for positioning in a longitudinal borehole of the workpiece and a fillet to avoid the elongate shank colliding with a drill for drilling the transverse borehole. In an example embodiment, the device has an aperture to further avoid the elongate shank colliding with the drill. In an example embodiment, the elongate shank has a cutting section with a cutting edge for detaching the burr from the opening of the transverse borehole.

Claims

1.-10. (canceled)

11. A device for detaching a burr from an opening of a transverse borehole of a workpiece, comprising: an elongate shank for positioning in a longitudinal borehole of the workpiece; and a fillet to avoid the elongate shank colliding with a drill for drilling the transverse borehole.

12. The device of claim 11, further comprising an aperture to further avoid the elongate shank colliding with the drill.

13. The device of claim 11, wherein the elongate shank comprises a cutting section having a cutting edge for detaching the burr from the opening of the transverse borehole.

14. The device of claim 11, comprising a cooling arrangement for cooling the elongate shank, the cooling arrangement comprising a cooling channel for passing a coolant through the elongate shank and for introducing the coolant into the longitudinal borehole of the workpiece, thus enabling the burr to be carried away out of the longitudinal borehole by the coolant.

15. A drilling station comprising: a drill; a workpiece; and the device of claim 11.

16. A drilling station comprising: a drill; a workpiece; and the device of claim 12.

17. The drilling station of claim 16, wherein: the workpiece comprises the longitudinal borehole; the elongate shank of the device is arranged in the longitudinal borehole; the workpiece is rotatable about the elongate shank from a first rotational position (R) into a second rotational position; a first transverse borehole can be introduced into the workpiece by the drill in the first rotational position (R); a second transverse borehole can be introduced into the workpiece by the drill in the second rotational position; and the elongate shank is positioned in the longitudinal borehole such that the fillet or the aperture permits collision-free drilling of the first transverse borehole or the second transverse borehole by the drill.

18. The drilling station of claim 17, wherein: the fillet or the aperture comprises an entrance directed to a point at which the first transverse borehole or the second transverse borehole is to be introduced; or the fillet or the aperture is arranged to be congruent or overlapping with the point in a plan view of the point.

19. A method comprising detaching a burr from an opening of a transverse borehole of a workpiece using the drilling station of claim 15.

20. The method of claim 19, wherein: wherein the elongate shank of the device is introduced into the longitudinal borehole of the workpiece; and the drill drills the transverse borehole while the elongate shank is arranged in the longitudinal borehole.

21. The method of claim 19, wherein: the workpiece is rotated about the elongate shank of the device from a first rotational position (R) into a second rotational position; and the burr is detached from the opening by the device during or simultaneously when the workpiece is rotated.

22. A method for removing a burr comprising: providing a tool with an elongate shank, the elongate shank comprising a cutting section comprising a first cutting edge and a second cutting edge; providing a workpiece with a longitudinal borehole; inserting the tool into the longitudinal borehole; drilling a first transverse borehole in the workpiece using a first drill; and rotating the workpiece or the tool to remove a burr created during the drilling.

23. The method of claim 22 wherein: the tool comprises a fillet extending longitudinally along the elongate shank through the cutting section; and the drill comprises a tip extending towards the fillet during the drilling.

24. The method of claim 23 wherein the tool comprises an aperture; and the tip extends into the aperture during the drilling.

25. The method of claim 22 wherein the tool further comprises a grip and the step of inserting the tool into the longitudinal borehole is performed by a human holding the grip.

26. The method of claim 22, further comprising drilling a second transverse borehole in the workpiece using a second drill prior to the step of rotating the workpiece or the tool.

27. The method of claim 22, further comprising drilling a second transverse borehole in the workpiece using the first drill after the step of rotating the workpiece or the tool.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Further features, advantages and effects of the disclosure will become apparent from the following description of preferred illustrative embodiments of the disclosure. In the drawings:

[0027] FIG. 1 shows a perspective view of a device for detaching at least one burr from an opening of at least one transverse borehole of a workpiece;

[0028] FIG. 2 shows the device from FIG. 1 in a plan view from above;

[0029] FIG. 3 shows a longitudinal section of the device from FIG. 2 along section line A-A;

[0030] FIG. 3a shows a section through the device from FIG. 3 along section line B-B;

[0031] FIG. 3b shows a section through the device from FIG. 3 along section line C-C;

[0032] FIG. 4 shows a workpiece having a longitudinal bore and having a first and a second transverse bore, wherein a shank of the device from FIG. 1 is arranged in the longitudinal bore;

[0033] FIG. 4a shows a section through the workpiece and the shank from FIG. 4 along section line B-B;

[0034] FIG. 4b shows a section through the workpiece and the shank from FIG. 4 along section line C-C; and

[0035] FIG. 5 shows a longitudinal section through the workpiece and the shank from FIG. 4, wherein two drills drill two transverse boreholes, which open into the longitudinal borehole.

[0036] In the figures, corresponding or identical parts are in each case provided with the same reference signs.

DETAILED DESCRIPTION

[0037] FIG. 1 shows a perspective view of a device 1 of a drilling station (not shown). The drilling station is a worktable, for example, which can be part of a production line for motor vehicle components.

[0038] FIG. 2 shows a plan view from above of the device 1 from FIG. 1. FIG. 3 shows a longitudinal section through the device 1 from FIG. 2 along section line A-A. FIGS. 3a and 3b show cross sections through the device 1 along section lines B-B and C-C.

[0039] The device 1 is designed to detach at least one burr 2 (FIG. 4) from an opening 3 (FIG. 4) of at least one transverse borehole 4 (FIG. 4) of a workpiece 5 of the drilling station. The workpiece 5 is shown in FIGS. 4 and 5. It is designed as a vehicle component, for example, in particular as a camshaft, as a selector valve housing or as a crankshaft. It has a longitudinal borehole 11 (FIGS. 4 and 5), into which the at least one transverse borehole 4, in particular a first, second, third and fourth transverse borehole 4a, 4b, 4c, 4d, opens. Thus, the workpiece 5 has four openings 3a, 3b, 3c, 3d.

[0040] The first and third transverse boreholes 4a, 4b can be introduced and/or have been introduced into the workpieces by means of the first drill 12a (FIG. 5) of the drilling station, and the second and fourth transverse boreholes 4c, 4d can be introduced and/or have been introduced into the workpiece 5 by means of a second drill 12b (FIG. 5) of the drilling station.

[0041] The workpiece 5 is mounted rotatably on the drilling station, thus enabling the workpiece 5 to be rotated from a first rotational position R into a second rotational position (not shown). In the first rotational position R, shown in FIG. 5, the first transverse borehole 4a is drilled and, in the second rotational position, the second transverse borehole 4b is drilled. In the case of a further rotation process, the third transverse borehole 4c is drilled in the first rotational position R, and the fourth transverse borehole 4d is drilled in the second rotational position.

[0042] According to FIGS. 1, 2 and 3, the device 1 is designed as an elongate component with a grip 6 for handling the device 1 and with a shank 7 for introduction into and positioning in the longitudinal borehole 11 of the workpiece 5. The shank 7 adjoins the grip 6 and is secured thereon. As an option, the shank is clamped in the grip 6 and is preferably positioned correctly on the grip 6 by means of a positioning surface.

[0043] The shank 7 is of stepped design and has at least two different diameters along its overall length. This makes it possible to deburr workpieces 5 which have a longitudinal borehole 11 with step changes in diameter. As an alternative, the shank 7 can have an invariable diameter along its overall length, thus making it possible to deburr workpieces 5, the longitudinal boreholes 11 of which have a constant diameter. The device 1, in particular the shank 7, is formed from a hard metal or from a tool steel, preferably a high-alloy tool steel.

[0044] The shank 7 comprises a cutting section 8 for detaching the at least one burr 2 from the opening 3 of the at least one transverse borehole 4 of the workpiece 5. The cutting section 8 has a first cutting edge 9 and a second cutting edge 10. Cutting section 8 extends over at least 30 percent, preferably at least 50 percent, in particular at least 70 percent and/or at most 95 percent of an overall length of the shank 7.

[0045] The shank 7 is introduced into the longitudinal borehole 11 of the workpiece 5 and positioned therein, as shown in FIGS. 4 and 5. The drilling of the transverse boreholes 4a, 4b, 4c, 4d takes place while the shank 7 is arranged in the longitudinal borehole 11.

[0046] To avoid a collision between the shank 7 and the first and second drills 12a, 12b in the case of and/or during drilling, the device 1 has a fillet 13, which is introduced into the shank 7. In particular, the shank 7 has the fillet 13. This extends over at least 30 percent, preferably at least 40 percent and in particular at least 50 percent of an overall length of the shank 7. The fillet 13 furthermore extends completely or almost completely along the cutting section 8, with the result that the two cutting edges 9, 10 delimit the fillet 13 at the sides.

[0047] To ensure the avoidance of a collision between the shank 7 and the first and second drills 12a, 12b, in particular drill tips 16a, 16b of the two drills 12a, 12b, the device 1 has a first and a second aperture 14, 15. As shown in FIGS. 3, 3a and 3b, the apertures 14, 15 are introduced as blind holes into the shank 7 and arranged in the fillet 13. As an alternative, it is also possible for the apertures 14, 15 to be designed as through holes.

[0048] The first aperture 14 has a smaller diameter than the second aperture 15. This enables the openings 3a, 3b, 3c, 3d of transverse bores 4a, 4b, 4c, 4d of different diameters to be deburred. Alternatively, it is possible for the two apertures to have corresponding diameters, in particular to enable openings of transverse boreholes with the same diameter to be deburred.

[0049] According to FIGS. 4 and 5, the shank 7 of the device 1 is arranged in the longitudinal bore 11 of the workpiece 5. The workpiece 5 occupies the first rotational position R. As can be seen especially from FIG. 5, the shank 7 of the device 1 is positioned in the longitudinal borehole 11 of the workpiece 5 in such a way that an opening of the fillet 13 is directed to the points at which the transverse boreholes 4a, 4c or 4b, 4d are drilled by the first and second drills 12a, 12b. In particular, the fillet 13 is arranged so as to overlap with the points.

[0050] In a plan view of the point at which the third transverse bore 4c is formed by the second drill 12b, the first aperture 14 is arranged below and congruently with the point. A collision with the drill tip 16b of the second drill 12b in the case of and/or during the drilling of the third transverse bore 4c is thereby avoided. In a plan view of the point at which the first transverse borehole 4a is formed by the first drill 12a, the second aperture 15 is arranged below and congruently with the point. A collision with the drill tip 16a of the first drill 12a in the case of and/or during the drilling of the first transverse borehole 4a is thereby avoided.

[0051] After the drilling of the first and third transverse boreholes 4a, 4c, the drills 12a, 12b are moved out of the respective transverse boreholes 4a, 4c. The workpiece 5 is rotated from the first rotational position R into the second rotational position. The rotation is carried out while the shank 7 of the device 1 is arranged in the longitudinal borehole 11. In the second rotational position, the drilling of the second and fourth transverse boreholes 4b, 4d can be carried out by the first and second drills 12a, 12b.

[0052] After the rotation of the workpiece 5 into the second rotational position, the shank 7 is positioned in the longitudinal borehole 11 of the workpiece 5 in such a way that the fillet 13 and the apertures 14, 15 are positioned in a corresponding manner to avoid collision with the drills 12a, 12b or with the drill tips 16a, 16b, as described above for the first rotational position R.

[0053] By means of the first cutting edge 9, the workpiece 5 can be deburred in the region of the openings 3a, 3c in the case of and/or during the rotation of the workpiece 5 from the first rotational position R into the second rotational position. For this purpose, in the case of and/or during the rotation of the workpiece 5, the first cutting edge 9 detaches the at least one burr 2, which is or can be arranged and/or formed on the opening 3a, 3c of the corresponding transverse borehole 4a, 4c by the drilling of the first and third transverse boreholes 4a, 4c.

[0054] By means of the second cutting edge 10, the workpiece 5 can be deburred in the region of the openings 3b, 3d in the case of and/or during the rotation into the second rotational position. For this purpose, in the case of and/or during the rotation of the workpiece 5 in the opposite direction, the second cutting edge 10 detaches the at least one burr 2, which is or can be arranged and/or formed on the opening 3b, 3d of the corresponding transverse borehole 4b, 4d by the drilling of the second and fourth transverse boreholes 4b, 4d.

[0055] According to FIG. 3, the device has a cooling arrangement 17 for cooling the shank 7 in the case of and/or during the rotation and deburring of the workpiece 5. The cooling arrangement 17 comprises a cooling channel 18, which extends completely through the grip and the shank 7 and opens into a free end 19 of the shank 7. Cooling fluid can be passed through the cooling channel 18 and emerges at the free end 19 of the shank 7. The cooling fluid picks up the at least one burr 2 detached from the respective opening 3 by the cutting section 8 and carries it away through the longitudinal borehole 11 of the workpiece. It is thereby possible to ensure deburring in a reliable process.

[0056] In summary, the corresponding openings 3a, 3b, 3c, 3d of the respective transverse boreholes 4a, 4b, 4c, 4d can be deburred simultaneously with the rotation of the workpiece 5 between the two rotational positions. This has the advantage that deburring can take place in a manner which is neutral in terms of the cycle time or virtually neutral in terms of the cycle time for the drilling of the transverse boreholes 4a, 4b, 4c, 4d. It is furthermore advantageous that a separate work step for deburring the workpiece 5 can be eliminated and, as a result, that production time and costs can be saved. In particular, unwanted folding over of the at least one burr as a deburring tool is introduced into the longitudinal borehole after the at least one transverse borehole has been drilled, something which often occurs in the case of the separate work step, can therefore be avoided.

REFERENCE NUMERALS

[0057] 1 device [0058] 2 burr [0059] 3 opening [0060] 4 transverse borehole [0061] 5 workpiece [0062] 6 grip [0063] 7 shank [0064] 8 cutting section [0065] 9 first cutting edge [0066] 10 second cutting edge [0067] 11 longitudinal borehole [0068] 12 drill [0069] 13 fillet [0070] 14 first aperture [0071] 15 second aperture [0072] 16 drill tip [0073] 17 cooling arrangement [0074] 18 cooling channel [0075] 19 free end [0076] R rotational position