WO2014167049A1 - Foret étagé - Google Patents

Foret étagé Download PDF

Info

Publication number
WO2014167049A1
WO2014167049A1 PCT/EP2014/057254 EP2014057254W WO2014167049A1 WO 2014167049 A1 WO2014167049 A1 WO 2014167049A1 EP 2014057254 W EP2014057254 W EP 2014057254W WO 2014167049 A1 WO2014167049 A1 WO 2014167049A1
Authority
WO
WIPO (PCT)
Prior art keywords
receiving
drill
axial
step drill
conical
Prior art date
Application number
PCT/EP2014/057254
Other languages
German (de)
English (en)
Inventor
Doberenz SABINE
Horst Stroissnigg
Rolf Spangenberg
Original Assignee
Hilti Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti Aktiengesellschaft filed Critical Hilti Aktiengesellschaft
Publication of WO2014167049A1 publication Critical patent/WO2014167049A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/60—Drills with pilots

Definitions

  • the present invention relates to a stepped drill for machining a workpiece, in particular a metallic or mineral substrate.
  • the step drill contains a shaft element for holding the step drill in a holding device of a machine tool, for example a drill and a conical drill head.
  • Stepped drills of the type described above are well known and are mainly used to create cylindrical holes in sheets, plates, profiles and pipes of steel, brass, copper, aluminum, V2A steels, mineral materials and various plastics.
  • the holes can be used, for example, a threaded bolt inserted through it and fixed by means of a lock nut in the workpiece.
  • a self-tapping screw is screwed into the through hole.
  • Different material thicknesses are usually used for the two different types of attachment, since the screwing of a self-tapping screw requires a greater material thickness to ensure a sufficient carrying length of the thread. It is therefore appropriate to use for the drilling of the respective through hole step drills, which have different lengths drill stages.
  • a step drill in which a conical cutting part is positioned on a cylindrically shaped clamping shaft.
  • the conical cutting part is formed by a plurality of step-like mutually arranged cutting sections.
  • a twist drill is mounted as a drill bit.
  • a disadvantage of the step drills of the prior art is that no adjustment or no adaptation of the drilling stages can be made and thus often carried a variety of different step drills with correspondingly different drilling stages to the workplaces and attached to the machine tool for drilling different holes got to.
  • a step drill according to the invention according to claim 1 is provided. Further advantageous embodiments of this step drill according to the invention are described in the dependent claims. Accordingly, a step drill for machining a workpiece, in particular a metallic or mineral substrate is provided, which includes a shaft member for holding the step drill in a holding device of a machine tool, such as a drill, and a conical boring head.
  • the conical boring head contains a first conical boring portion and a second conical boring portion.
  • a fixing device for fixing the first drilling portion relative to the second drilling portion may be provided, whereby the first drilling portion and the second drilling portion can be releasably connected to each other.
  • the fixing device may comprise an axial insertion element with a first insertion end and a second insertion end, an axial receiving element with a first receiving end and a second receiving end, and a holding device for receiving a holding element, wherein the holding device at least partially aligned perpendicular to the axial receiving element.
  • the fixing apparatus In order to prevent the first drilling portion from moving relative to the second drilling portion, it is further possible for the fixing apparatus to include a rotation lock.
  • the anti-rotation includes a polygonal Sich ceremoniessseinsteckelement and a configured for receiving the Sich ceremoniessseinsteckelements fuse receiving element. Due to the polygonal shape of the Sich ceremoniessseinsteckelements and the corresponding fuse receiving element can effectively prevent the mutual rotation of these two elements to each other.
  • the polygonal shape can be configured, for example, as a hexagon or in any other suitable form.
  • the Sich ceremoniessseinsteckelement is positioned on the axial insertion element and the fuse receiving element on the axial receiving element.
  • a position device may be provided with a Positionseinsteckelement and a position-receiving element.
  • the position male member may be positioned at the first insertion end of the axial insertion member and the position receiving member at the first receiving end of the position receiving member.
  • a helical drill point with a point angle between 103 ° and 133 ° can be provided, whereby an optimal drilling performance can be achieved.
  • a drilling groove with an angle between 8 ° and 22 ° can further be provided that a drilling groove with an angle between 8 ° and 22 °.
  • FIG. 1 shows a side view of a step drill according to the invention comprising a conical boring head with a first conical boring portion and a second conical boring portion as well as a shaft element;
  • FIG. 2 is an isometric view of the step drill according to the invention.
  • Fig. 3 is a side view of the second Kegelbohranteils
  • FIG. 4 shows an isometric view of the anti-rotation device with a polygonal securing male element and a securing receiving element designed to receive the securing male element and the positioning device with a position male element and a position-receiving element;
  • FIG. 5 is a sectional view through the first and second Kegelbohranteil with the anti-rotation device and the positioning device along the section line AA in Fig. 3rd
  • Fig. 1 and 2 shows the step drill 1 according to the invention for processing a (not shown) workpiece, in particular a metallic or mineral substrate. Editing can be, for example, the chipping of a rock.
  • the step drill 1 contains a shaft element 10 and a conical bore head 20.
  • the shaft member 10 is in the form of a cylinder and serves to hold the step drill 1 in a (not shown) holding device of a machine tool, such as a drill.
  • the holding device of the machine tool can be configured as a chuck.
  • the cylindrical shape of the shaft element 10 can also have a polygonal cross-section as an alternative to the round cross-section shown here.
  • the conical boring head 20 includes a first tapered portion 30, a second tapered portion 40, a fixture 50 and a central axis of rotation R.
  • a first bore 22 and a second bore 24 are disposed opposite each other on the outer surface of the tapered bore 20.
  • the two drill grooves 22, 24 thus extend along the first conical bore portion 30 and the second conical bore portion 40.
  • An optimum angle for the bore grooves 22, 24 is between 8 ° and 22 °.
  • the first tapered portion 30 includes a first end 32 and a second end 34 and a plurality of different drilling stages 35, which are arranged stepwise in increasing form to each other.
  • the first conical bore portion 30 at the first end 32 includes a helical drill bit 36.
  • the optimum apex angle for the helical drill bit 36 is in a range between 103 ° and 133 °.
  • the second conical bore portion 40 includes a first end 42 and a second end 44 and a plurality of different drilling stages 45, which are also arranged stepwise in increasing shape to each other.
  • the fixing device 50 includes an axial insertion member 52 having a first insertion end 52a and a second insertion end 52b, and an axial receiving member 54 having a first receiving end 54a and a second receiving end 54b.
  • the fixing device 50 also serves to fix the first conical boring portion 30 relative to the second conical boring portion 40, so that the two conical boring portions 30, 40 are releasably secured together. Furthermore, the fixing device 50 includes a rotation lock 55, which in turn has a Sich ceremoniessseinsteckelement 72 and a configured for receiving the Sich ceremoniessseinsteckelements 72 fuse receiving element 74.
  • the securing male element 72 is positioned on the axial insertion element 52 and the securing receiving element 74 on the axial receiving element 54.
  • the securing male member 72 on the axial insertion member 52 is in the form of a hexagonal cylinder and includes a first insertion end 72a and a second insertion end 72b.
  • the first insertion end 72a is positioned at the second end 34 of the first tapered portion 30.
  • the securing male element 72 has a receiving region 80 for the retaining element 70 in the vicinity of the second insertion end 72b.
  • the receiving area 80 is in the form of a wedge-shaped recess. The cooperation of the receiving area 80 and the holding element 70 will be described in more detail below.
  • the fuse receiving element 74 on the axial receiving element 54 is formed in the form of a hexagonal cylindrical bore in the second Kegelbohranteil 40 along the axis of rotation R and corresponds in cross section to the shape of the cross section of the Sich ceremoniessseinsteckelements 72. This takes the fuse receiving element 74, the Sich ceremoniessseinsteckelement 72 rotationally fixed in itself whereby also the first conical boring portion 30 is held in a rotationally fixed manner to the second conical boring portion 40.
  • the holding device 60 is designed in the form of a cylindrical bore and extends perpendicular to the axis of rotation R of the outer surface of the second Kegelbohranteils 40 to the axial receiving element 54 in the second Kegelbohranteil 40.
  • the cylindrical bore of the holding device 60 in this case has a circular cross-section.
  • the cross section may have any other suitable shape.
  • the holding member 70 is formed in the form of a cylindrical metal pin having a first holding member end 70a and a second holding member end 70b.
  • the cross section of the holding element 70 is circular. Alternatively, however, the cross section may also have any other suitable shape.
  • the cross-sectional shape of the retaining element 70 should correspond to the cross-sectional shape of the cylindrical bore of the holding device 60.
  • the first holding element end 70a is in the form of a wedge.
  • the wedge shape of the first holding element end 70a is designed such that it fits into the slot-shaped recess 80 of the axial insertion element 52 in a form-fitting manner.
  • the holding device 60 for receiving a retaining element 70 by a screw in particular a Grub screw, a pressure pin, an O-ring, a sheet metal clip or the like can be realized.
  • the fixing device 50 contains a positioning device 100 with a position-insertion element 110 and a position-receiving element 120.
  • the position-insertion element 110 is positioned on the first insertion end 52a of the axial insertion element 52.
  • the cross-section of the position male element 110 is in the form of a circle with the circle segment cut off.
  • the position-receiving element 10 is in turn positioned at the first receiving end 54a of the axial receiving element 54.
  • the cross-section of the position-receiving element 120 is in the form of a circle with a segment of a circle cut off.
  • the cross-sectional shape of the position receiving member 120 corresponds to the cross-sectional shape of the position male member 110 so that the position male member 110 can be received in the position receiving member 120.
  • the specific cross-sectional shape of the position male member 110 and the position-receiving member 120 enable the axial male member 52 to be fully inserted into the axial female member 54 in only one orientation, thereby properly connecting the first tapered male member 30 to the second tapered male member 40.
  • first conical boring portion 30 Due to the configuration of the conical boring head 20 with a first conical boring portion 30 which can be released from the second conical boring portion 40, it is possible to replace the first conical boring portion 30 in a first embodiment by a conical boring portion in another embodiment.
  • the two embodiments of the first conical bore portions 30 may differ from each other in particular in terms of shape, height, diameter and number.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention concerne un foret étagé (1), destiné à usiner une pièce, en particulier un support métallique ou minéral, qui contient un élément de tige (10) servant à fixer le foret étagé (1) dans un système de retenue d'une machine-outil, par exemple une perceuse, ainsi qu'une tête de perçage conique (20). La tête de perçage conique (20) contient en outre une première partie de perçage conique (30) et une seconde partie de perçage conique (40).
PCT/EP2014/057254 2013-04-12 2014-04-10 Foret étagé WO2014167049A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206573.6 2013-04-12
DE102013206573.6A DE102013206573A1 (de) 2013-04-12 2013-04-12 Stepper

Publications (1)

Publication Number Publication Date
WO2014167049A1 true WO2014167049A1 (fr) 2014-10-16

Family

ID=50473321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/057254 WO2014167049A1 (fr) 2013-04-12 2014-04-10 Foret étagé

Country Status (2)

Country Link
DE (1) DE102013206573A1 (fr)
WO (1) WO2014167049A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104646728A (zh) * 2014-12-29 2015-05-27 苏州用朴合金工具有限公司 一种锥形阶梯钻头

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105397155A (zh) * 2015-11-30 2016-03-16 哈尔滨飞机工业集团有限责任公司 一种两齿划孔刀具
US11453069B2 (en) 2018-07-24 2022-09-27 Milwaukee Electric Tool Corporation Drilling tool assembly including a step drill bit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007203396A (ja) * 2006-01-31 2007-08-16 Jefcom Kk ステップドリル
US20080029311A1 (en) * 2006-05-09 2008-02-07 Seeley Scott C Unibit with replacement blade
CN201151004Y (zh) * 2007-12-03 2008-11-19 岳八金 可换头阶梯钻
US8388280B1 (en) * 2007-10-04 2013-03-05 Orlo Ison Step drill bit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9414659U1 (de) * 1994-09-09 1994-11-17 Dürr Präzisionswerkzeuge GmbH, 74613 Öhringen Mehrstufenbohrer
DE29512886U1 (de) * 1995-08-10 1995-10-12 Gustav Weber Schlagringwerkzeug-Fabrik, 42349 Wuppertal Bohrer
DE202008000368U1 (de) 2008-01-09 2008-03-13 RUKO GmbH Präzisionswerkzeuge Mehrstufenbohrer mit Bohranschlag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007203396A (ja) * 2006-01-31 2007-08-16 Jefcom Kk ステップドリル
US20080029311A1 (en) * 2006-05-09 2008-02-07 Seeley Scott C Unibit with replacement blade
US8388280B1 (en) * 2007-10-04 2013-03-05 Orlo Ison Step drill bit
CN201151004Y (zh) * 2007-12-03 2008-11-19 岳八金 可换头阶梯钻

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104646728A (zh) * 2014-12-29 2015-05-27 苏州用朴合金工具有限公司 一种锥形阶梯钻头

Also Published As

Publication number Publication date
DE102013206573A1 (de) 2014-10-16

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