EP4547433A1 - Metallbohrer und verfahren - Google Patents
Metallbohrer und verfahrenInfo
- Publication number
- EP4547433A1 EP4547433A1 EP23732523.8A EP23732523A EP4547433A1 EP 4547433 A1 EP4547433 A1 EP 4547433A1 EP 23732523 A EP23732523 A EP 23732523A EP 4547433 A1 EP4547433 A1 EP 4547433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blind hole
- shaft
- drilling direction
- drill
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/10—Bits for countersinking
- B23B51/108—Bits for countersinking having a centering drill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0006—Drills with cutting inserts
- B23B51/0007—Drills with cutting inserts with exchangeable cutting insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/009—Stepped drills
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
Definitions
- the present invention relates to a drill for hand-held drilling of a blind hole in a metal workpiece.
- Drills which have a shaft defining a drilling direction with a cutting edge and a stop shoulder, the distance between which defines a blind hole depth.
- the stop shoulder usually has an edge which creates a hole with a sharp edge in a possibly existing cover layer of a workpiece.
- a sealing ring which may later cover the hole, can be damaged by the edge.
- the invention is based on the object of providing a drill with which the risk of damage to a sealing element is reduced.
- a drill for hand-held drilling of a blind hole with a blind hole diameter and a blind hole depth in a workpiece made of metal comprising a shaft which defines a drilling direction and has an axis of rotation oriented in the drilling direction, the shaft at its point pointing in the drilling direction End has a cutting edge and at a distance from the cutting edge that defines the blind hole depth and is measured against the drilling direction, a stop shoulder, the cutting edge defining the blind hole diameter by rotation about the axis of rotation, the shaft having an enveloping circle diameter that changes along the axis of rotation, which is larger at the stop shoulder than the blind hole diameter, the shaft having an enveloping circle diameter that changes along the axis of rotation and which is larger than the blind hole diameter at the stop shoulder, the shaft having a first shaft section which adjoins the stop shoulder in the opposite direction to the drilling direction and which reaches up to the stop shoulder and in which the enveloping circle diameter, starting from the stop shoulder, increases, preferably continuously, in the opposite direction to the
- An enveloping circle diameter in the sense of the invention is the diameter of the smallest possible circle, which still completely envelops the shaft with a circle center on the axis of rotation.
- the circular area of the enveloping circle is the area that the shaft covers when rotating about the axis of rotation.
- the enveloping circle diameter is equal to the diameter of the circumferential line, i.e. the shaft diameter. Inward deviations of the circumferential line from the circular shape do not affect the enveloping circle diameter, but outward deviations increase the enveloping circle diameter.
- the shaft has a centering tip at its end pointing in the drilling direction, through which the axis of rotation runs.
- the stop shoulder has a stop surface that is aligned perpendicular to the axis of rotation and points in the drilling direction.
- the shaft has a fastening section at its end pointing counter to the drilling direction for temporary fastening to a hand-held drill.
- the fastening section is particularly preferably designed as an insertion end.
- the first section has a conical shape.
- An opening angle of the conical shape is preferably at least 60°, particularly preferably at least 90° or at least 120°.
- the first section extends along the axis of rotation over at least 0.5 mm, preferably at least 1.0 mm, particularly preferably at least 1.5 mm or at least 2.0 mm.
- the object is also achieved in a method for attaching a fastening element to a workpiece, in which a workpiece having a cover layer and a drill are provided as stated above, a blind hole is drilled through the cover layer into the workpiece using the drill, whereby the first shaft section of the drill creates a hole in the cover layer that enlarges in the opposite direction to the drilling direction, a fastening element having a sealing element being further provided and driven into the blind hole, the sealing element being pressed against the hole in the cover layer.
- the fastening element is preferably screwed into the blind hole.
- Fig. 1 a drill
- Fig. 2 a workpiece
- Fig. 3 shows a drill with a fastening element
- Fig. 4 shows a workpiece with a sealing element.
- FIG. 1 shows a drill 10, which is suitable for hand-held drilling of a blind hole in a metal workpiece (not shown), in a side view.
- the drill 10 comprises a shaft 20, which defines a drilling direction 30 and has an axis of rotation oriented in the drilling direction 30.
- the shaft 20 has a cutting edge 50 and a further cutting edge, not shown, which are arranged opposite one another and symmetrically with respect to the axis of rotation and together define a blind hole diameter of the drilled blind hole by rotation about the axis of rotation.
- the shaft 20 has a stop shoulder 55 with a stop surface 60 that is aligned perpendicular to the axis of rotation and points in the drilling direction 30.
- the stop shoulder 55 abuts a surface of the workpiece, so that the distance of the stop surface 60 from the cutting edge 50, measured against the drilling direction 30, defines a blind hole depth of the drilled blind hole.
- the shaft 20 has an insertion end, not shown, for temporary attachment to a hand-held drill.
- the shaft 20 has an envelope circle diameter that changes along the axis of rotation. At the stop shoulder 55, the enveloping circle diameter is larger than the blind hole diameter. Furthermore, the shaft 20 has a centering tip 70 at its end pointing in the drilling direction 30, through which the axis of rotation runs. The entire shaft 20 including the cutting edge 50 and the centering tip 70 is formed in one piece, so that the stop shoulder 55 and the cutting edge 50 consist of the same material, preferably a metal or an alloy, particularly preferably a steel.
- the shaft 20 has two spiral-shaped grooves 90 which extend through the stop shoulder 55 and are delimited by the cutting edge 50 or by the further cutting edge.
- the shaft 20 has a first shaft section 40 which adjoins the stop shoulder 55 in the opposite direction to the drilling direction 30, which reaches up to the stop shoulder 55 and in which the enveloping circle diameter, starting from the stop shoulder 55, increases steadily against the drilling direction 30.
- the first shaft section has a conical shape with an opening angle of 140° and extends over 2.5 mm along the axis of rotation.
- Fig. 2 shows a workpiece 100 with a cover layer 110.
- the workpiece has a blind hole 120, which was created, for example, using the drill 10 from Fig. 1.
- the first shaft section of the drill has created a hole 130 in the cover layer that enlarges in the opposite direction to the drilling direction.
- Fig. 3 shows a drill 150 with a bit holder 160 and a fastening element 170, which has a sealing element 180 designed as a sealing ring and is driven, for example, into the blind hole 120 from Fig. 2.
- FIG. 4 shows the workpiece 100 with the cover layer 110 after a fastening element, of which only one sealing element 190 is shown, has been driven into the blind hole 120.
- the sealing element 190 is pressed against the hole 130 in the cover layer, which enlarges in the opposite direction to the drilling direction. Due to the conical shape of the hole 130, the sealing element 190 is protected from excessive stress.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drilling Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22181712.5A EP4299221A1 (de) | 2022-06-28 | 2022-06-28 | Metallbohrer und verfahren |
| PCT/EP2023/065794 WO2024002673A1 (de) | 2022-06-28 | 2023-06-13 | Metallbohrer und verfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4547433A1 true EP4547433A1 (de) | 2025-05-07 |
Family
ID=82492403
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22181712.5A Withdrawn EP4299221A1 (de) | 2022-06-28 | 2022-06-28 | Metallbohrer und verfahren |
| EP23732523.8A Pending EP4547433A1 (de) | 2022-06-28 | 2023-06-13 | Metallbohrer und verfahren |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22181712.5A Withdrawn EP4299221A1 (de) | 2022-06-28 | 2022-06-28 | Metallbohrer und verfahren |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20250367739A1 (de) |
| EP (2) | EP4299221A1 (de) |
| JP (1) | JP2025521317A (de) |
| KR (1) | KR20250027659A (de) |
| CN (1) | CN119317501A (de) |
| AU (1) | AU2023299966A1 (de) |
| CA (1) | CA3254008A1 (de) |
| TW (1) | TW202408693A (de) |
| WO (1) | WO2024002673A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418549A (en) * | 1962-03-19 | 1968-12-24 | Rohr Corp | Combined numerical and torque control for a work and feed machine tool |
| DE19543233A1 (de) * | 1995-11-07 | 1997-05-15 | Johne & Co Praezisionswerkzeug | Bohrwerkzeug mit auswechselbarer Spitze |
| US6488458B2 (en) * | 1996-02-23 | 2002-12-03 | Hitachi, Ltd. | Taper implant and a screw-fastening structure using a taper implant with female threads |
| US6582172B2 (en) * | 2001-08-29 | 2003-06-24 | The United States Of America As Represented By The Secretary Of The Navy | Isolated mechanical fastening system |
| DE20210909U1 (de) * | 2002-07-18 | 2003-05-15 | HAKOS Präzisionswerkzeuge Hakenjos GmbH, 78054 Villingen-Schwenningen | Bohrwerkzeug |
| CN113458462A (zh) * | 2020-03-30 | 2021-10-01 | 深圳市西科技术有限公司 | 一种阶梯钻刀具 |
| CN112228555A (zh) * | 2020-09-15 | 2021-01-15 | 北京自动化控制设备研究所 | 一种小型化微机械惯性卫星组合导航系统密封方法 |
-
2022
- 2022-06-28 EP EP22181712.5A patent/EP4299221A1/de not_active Withdrawn
-
2023
- 2023-05-29 TW TW112119905A patent/TW202408693A/zh unknown
- 2023-06-13 JP JP2024574641A patent/JP2025521317A/ja active Pending
- 2023-06-13 EP EP23732523.8A patent/EP4547433A1/de active Pending
- 2023-06-13 AU AU2023299966A patent/AU2023299966A1/en active Pending
- 2023-06-13 KR KR1020247042113A patent/KR20250027659A/ko active Pending
- 2023-06-13 WO PCT/EP2023/065794 patent/WO2024002673A1/de not_active Ceased
- 2023-06-13 US US18/870,863 patent/US20250367739A1/en active Pending
- 2023-06-13 CA CA3254008A patent/CA3254008A1/en active Pending
- 2023-06-13 CN CN202380047423.6A patent/CN119317501A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN119317501A (zh) | 2025-01-14 |
| CA3254008A1 (en) | 2025-07-04 |
| TW202408693A (zh) | 2024-03-01 |
| US20250367739A1 (en) | 2025-12-04 |
| AU2023299966A1 (en) | 2024-12-05 |
| JP2025521317A (ja) | 2025-07-08 |
| KR20250027659A (ko) | 2025-02-27 |
| WO2024002673A1 (de) | 2024-01-04 |
| EP4299221A1 (de) | 2024-01-03 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20250128 |
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| AK | Designated contracting states |
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