WO2013026730A1 - Outil de perçage d'avant-trous - Google Patents

Outil de perçage d'avant-trous Download PDF

Info

Publication number
WO2013026730A1
WO2013026730A1 PCT/EP2012/065797 EP2012065797W WO2013026730A1 WO 2013026730 A1 WO2013026730 A1 WO 2013026730A1 EP 2012065797 W EP2012065797 W EP 2012065797W WO 2013026730 A1 WO2013026730 A1 WO 2013026730A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting plate
shaft
drilling tool
extension
hole drilling
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.)
Ceased
Application number
PCT/EP2012/065797
Other languages
German (de)
English (en)
Inventor
Klaus Daut
Tobias Adam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2013026730A1 publication Critical patent/WO2013026730A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0466—Drills for trepanning with exchangeable cutting inserts, e.g. able to be clamped

Definitions

  • the field of application of the invention extends to a tool for drilling holes according to the principle of so-called core drilling.
  • the invention has particular reference to the introduction of small holes in hardened workpieces, without, however, to be limited to the introduction of small holes in hardened workpieces.
  • To fulfill the chipping function it is known to provide the substantially tubular shank of core hole drilling tools with one or more inserts at one of its ends. In order to achieve a reasonable chip guidance, it is known, for example from DE 3419350, to arrange two or more of these cutting plates substantially on a line extending radially from the center of the drilling tool.
  • each of these inserts has a width, the lower is the width of the circle to be cut free.
  • the cut-free is realized by the fact that the two offset by about 180 ° to each other at the end face of the shaft mounted cutting plates - overlap - in the settlement.
  • using the core hole drilling tool known from DD 142673 or DE 3419350 for the production of core hole bores results in high heat inputs into the workpiece, which also occur with the usually one set cooling media but can only be dissipated insufficient. To minimize these sometimes harmful heat inputs, it is therefore necessary to lower the cutting speeds. The latter applies the more, the harder the material is, in which the respective core hole is to be introduced.
  • the invention has for its object to provide a Kernlochbohrwerkmaschine, which reduces the heat input into the workpiece.
  • the end of the shaft is provided with at least one extension which extends in the direction of the axis of rotation of the shaft, has a wall thickness and camber corresponding to the shaft and which adjoins a part of the circumference of the shaft, and is each free end of the extension provided with an insert, the width of each insert being slightly larger than the wall thickness of the shank, there is provided a core hole boring tool in which each insert is capable of cutting the annular gap characteristic of core hole drilling.
  • the cutting work is distributed over the various inserts, which reduces the load on the core punch.
  • the inserts can be replaced after their wear very quickly against, for example, nachgeWarrfte inserts.
  • the term solvable includes all types of screw, clamp, adhesive, and solder joints.
  • the detachable connections of the screw or clamping type formed on the shaft extension is because the extension of these extensions projecting in the direction of the axis of rotation of the shaft can be used in particular for the realization of clamping or screw connections.
  • the shaft according to claim 3 has a diameter of less than 130 mm, it can be used very easily in commercially available drill chuck.
  • the insert has a width of less than 10 mm.
  • the width of the extension of the cutting plate in the radial direction with respect to a beam which passes through the center of the shaft has the consequence that only a small amount of cutting work has to be done.
  • widths of the inserts between 2 and 6 mm, since in this area an optimum between stability of the cutting plate and Zerschreibsarbeit / heat input is given in the tool.
  • a particularly good support of the inserts is given if, according to claim 5, the extension has a recess into which the insert is inserted, and if at least one side of the insert in the connected state of the insert and extension no complete physical contact with the sides facing Sides of the recess has. If only the side of the cutting plate which cuts into the workpiece for material removal is the side which does not have complete physical contact with the recess, the cutting plate is informed by the complete constant physical contact of their other sides with the recess provides superior support during core hole drilling.
  • the cutting plate has at least one cutting edge and a groove, wherein the groove extends substantially perpendicular to the cutting edge.
  • This deflection of the chip in the direction of the groove causes the slight width of the chip to be reduced and thus the chip has little or no contact with the walls of the workpiece being machined by the core hole drilling tool.
  • a particularly good chip formation is achieved when the lateral walls of the groove, starting from the region which faces the cutting edge, converge towards one another.
  • FIG. 1 is a perspective of a Kernlochbohrtechnikmaschines
  • FIG. 2 shows a detail of a core hole drilling tool according to FIG. 1
  • FIG. 3 shows a detail of a core hole drilling tool
  • Figure 4 is a plan view of the underside of a Kernlochbohrtechnikmaschines. and Fig. 5 an insert.
  • the core hole drilling tool 1 shows a core hole drilling tool 1, which is essentially formed by a tubular shaft 2 and an extension 3.
  • the extension 3, which extends in the direction of the axis of rotation R of the shaft 2, has - as in this context, in particular also Fig. 2 disclosed- a shaft 2 corresponding wall thickness D and curvature. 1, the extension 3 shown only extends part of the circumference of the shaft 2. In the exemplary embodiment according to FIG. 1, it is about 15% of the circumference of the shaft 2.
  • the core hole drilling tool 1 is used to produce core hole bores with the edge of the shaft 2, which is opposite to the edge provided with the extension 3, in a suitable chuck (not shown) and set in rotation F1.
  • the free end 4 of the extension 3 is provided with a cutting plate 5, the width B of which is slightly larger than the wall thickness D of the shaft 2.
  • FIG. 2 shows a section through the shaft 2 in the axial direction Extension 3 and the cutting plate 5 of FIG. 1 shows.
  • the Cutting plate 5 is arranged in a recess 3 left in the recess 6, wherein the two side surfaces 7a, 7b of the cutting plate 5, in contrast to the top surface 8 of the insert 5 have no complete physical contact with the walls 9a, 9b, 9c of the recess 6.
  • This incomplete physical contact between the side surfaces 7a, 7b of the cutting plate 5 and the walls 9a, 9b also has the result that the cutting plate 5 protrudes downward from the extension 3.
  • FIG. 3 How the respective cutting plate 5 can be detachably fastened in the extension is shown in more detail in FIG.
  • a cutting plate 5 is inserted into the recess 6.
  • This cutting plate 5 has - as the plan view of FIG. 3 shows- essentially a rectangular cross-section, however, the bottom 10 of the cutting plate 5 is formed slightly angled. It can also be seen from the illustration according to FIG. 3 that not only the head surface 8 of the cutting plate 5 but also the rear side surface 7b has complete physical contact with the corresponding walls 9b, 9c of the recess 6.
  • This arrangement of the cutting plate 5 in the extension 3 has the result that a good support of the cutting plate 5 against the rotational direction F2 is provided and that the side surface 7a, which is not completely in physical contact with the wall 9a of the recess 6, only the cutting work guaranteed.
  • the cutting plate 5 is detachably connected to the extension 3 by clamping.
  • a slot 1 1 is guided starting from the recess 6 in the extension 3.
  • a screw 12 is screwed into the extension 3.
  • the screwed-in screw 12 reduces the clear width of the slot 1 1, whereby an inserted into the recess 6 cutting plate 5 is clamped in this.
  • the cutting plate 5 can be bolted to the extension 3 by one or several screws are screwed through the extension in corresponding threaded holes of the cutting plate 5.
  • FIG. 4 The plan view of an underside of a Kernlochbohrwerkmaschines 1 shown in FIG. 4 can be seen that this Kernlochbohrwerkmaschine 1 with two extensions 3a, 3b and two cutting plates 5a, 5b is provided, the two extensions 3a, 3b in the circumferential direction of the core hole drilling tool 1 offset by about 180 ° to each other.
  • FIGS. 1 to 4 the separating plates 5 are shown only schematically.
  • Fig. 5 shows a cutting plate 5 in detail.
  • This cutting plate 5 comprises a ramp-shaped cutting edge 13, to which - with a view towards the figure - upwards a cuboidal part 14 connects.
  • This cuboid part 14 is provided with a groove 17 on its front edge 16 facing the cutting edge 15.
  • the groove 17 extends essentially at right angles to the cutting edge 15.
  • the two are the groove 17 forming walls 18a, 18b are not arranged parallel to each other, but in the longitudinal direction of the parallelepiped part 14 slightly towards each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention concerne un outil de perçage d'avant-trous qui présente, outre une tige tubulaire (2), également au moins un prolongement (3) dont l'épaisseur de paroi (D) et la courbure correspondent à celles de la tige (2). Chacun de ces prolongements (3) comporte une plaquette de coupe (5). Du fait que la largeur (B) de chaque plaquette de coupe (5) correspond à la largeur totale de la surface annulaire mais que cette largeur n'est que de quelques millimètres, l'outil de perçage d'avant-trous permet de réaliser sans problèmes des avant-trous dans des pièces dont le matériau présente une dureté supérieure à 60 HRC.
PCT/EP2012/065797 2011-08-23 2012-08-13 Outil de perçage d'avant-trous Ceased WO2013026730A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081359.4 2011-08-23
DE201110081359 DE102011081359A1 (de) 2011-08-23 2011-08-23 Kernlochbohrwerkzeug

Publications (1)

Publication Number Publication Date
WO2013026730A1 true WO2013026730A1 (fr) 2013-02-28

Family

ID=46651507

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/065797 Ceased WO2013026730A1 (fr) 2011-08-23 2012-08-13 Outil de perçage d'avant-trous

Country Status (2)

Country Link
DE (1) DE102011081359A1 (fr)
WO (1) WO2013026730A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1009108S1 (en) 2020-09-21 2023-12-26 Kyocera Unimerco Tooling A/S Drill

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430526A (en) * 1965-06-30 1969-03-04 Interpace Corp Shell cutter
DD142673A1 (de) 1979-04-03 1980-07-09 Wolfgang Berthold Werkzeug zum kernbohren
DE3419350A1 (de) 1984-05-24 1985-11-28 Dieter 4100 Duisburg Böhmer Bohrkopf zum tieflochbohren bzw. kernbohren
SU1433650A1 (ru) * 1987-04-17 1988-10-30 Предприятие П/Я Г-4780 Головка дл кольцевого сверлени
US5451128A (en) * 1994-01-29 1995-09-19 T. D. Williamson, S.A. Cutter tool having removable teeth

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430526A (en) * 1965-06-30 1969-03-04 Interpace Corp Shell cutter
DD142673A1 (de) 1979-04-03 1980-07-09 Wolfgang Berthold Werkzeug zum kernbohren
DE3419350A1 (de) 1984-05-24 1985-11-28 Dieter 4100 Duisburg Böhmer Bohrkopf zum tieflochbohren bzw. kernbohren
SU1433650A1 (ru) * 1987-04-17 1988-10-30 Предприятие П/Я Г-4780 Головка дл кольцевого сверлени
US5451128A (en) * 1994-01-29 1995-09-19 T. D. Williamson, S.A. Cutter tool having removable teeth

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198930, 1989 Derwent World Patents Index; AN 1989-218648, XP002684931 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1009108S1 (en) 2020-09-21 2023-12-26 Kyocera Unimerco Tooling A/S Drill

Also Published As

Publication number Publication date
DE102011081359A1 (de) 2013-02-28

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