WO2003061898A1 - Foret en forme de barre et son procede de production - Google Patents

Foret en forme de barre et son procede de production Download PDF

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Publication number
WO2003061898A1
WO2003061898A1 PCT/EP2003/000619 EP0300619W WO03061898A1 WO 2003061898 A1 WO2003061898 A1 WO 2003061898A1 EP 0300619 W EP0300619 W EP 0300619W WO 03061898 A1 WO03061898 A1 WO 03061898A1
Authority
WO
WIPO (PCT)
Prior art keywords
end region
inner recess
rod
drill
longitudinal direction
Prior art date
Application number
PCT/EP2003/000619
Other languages
German (de)
English (en)
Inventor
Arno Friedrichs
Original Assignee
Arno Friedrichs
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 Arno Friedrichs filed Critical Arno Friedrichs
Publication of WO2003061898A1 publication Critical patent/WO2003061898A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/004—Article comprising helical form elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/18—Ceramic

Definitions

  • the invention relates to a rod-shaped drill made of hard metal or ceramic, which has a first and a second end region in the longitudinal direction, the second end region being provided with a cutting edge which has at least one chip chamber in the longitudinal direction on its outer circumference, and which has at least one longitudinally extending one Has inner recess.
  • the helical or spiral shape of the flutes provided on the outer circumference of the drill is adapted to the helical or spiral shape of the at least one inner recess, which is used in the finished drill to supply coolant or lubricant to the cutting area, this ensures that the drill has favorable cutting and machining properties.
  • the known method makes it possible to produce drills with small and very small dimensions.
  • the invention has for its object to show a way how the above-mentioned problem can be further reduced.
  • the claim 8 relates to a method for producing a rod-shaped drill.
  • the advantages of the invention consist in particular in that, by increasing the cross-sectional area of the inner recess in the second end region of the drill, there is more cooling liquid in the region of the cutting edge of the drill, so that the cooling is improved.
  • the coolant emerging from the inner recess is better distributed over the entire area of the cutting edge than is the case with known drills.
  • the edge of the inner recess in the second end region has a first section which runs essentially parallel to the cutting edge and a second section which runs essentially parallel to the edge of a field. Then, even when regrinding a blunt drill, it is ensured that the field is not abraded so far that the edges of the inner recess are broken open. It also ensures that the The stability of the drill is retained even in subsequent drilling operations.
  • FIG. 1 shows a sketch to illustrate a rod-shaped drill according to the invention
  • Figure 2 is a sketch illustrating a view of a rod-shaped drill in the direction of arrow x in Figure 1 when a drill with two oval-shaped inner recesses and
  • FIG. 3 shows a flow diagram to illustrate a method for producing a rod-shaped drill according to the invention.
  • Figure 1 shows a sketch of a rod-shaped drill according to the invention.
  • This drill is made of hard metal or ceramic and is therefore suitable for drilling holes in hard materials.
  • the second end region E2 is provided with a cutting edge S.
  • the drill is clamped in an associated drill chuck of a drilling machine in order to carry out a drilling process.
  • the drill is provided with at least one spiral chip chamber SK along its outer circumference. Viewed in the longitudinal direction, a section of a field F is located between two chip chamber sections, as can be seen from FIG. 1.
  • the drill shown is provided with an inner recess I, which extends over the entire length of the drill and extends in a spiral in its interior.
  • This Inner recess I is indicated by dashed lines in FIG. 1.
  • the inner recess I has a circular cross-sectional area. This cross-sectional area of the inner recess I is constant over a large part of the length of the drill, starting from the end section El and has the following value:
  • dl corresponds to the diameter of the circular cross-sectional area in the first end region El of the drill.
  • the circular inner recess is widened. There it has a diameter d2, which is larger than the diameter dl in the first end region E1 of the drill.
  • the cross-sectional area of the inner recess I, starting from the end section E2, is also constant over a small part of the length of the drill and has the following value:
  • d2 corresponds to the diameter of the circular cross-sectional area in the second end region E2 of the drill.
  • the cooling process can be further improved if two or more internal recesses are provided in the drill, each of which is widened in the second end region of the drill.
  • the cross sections of the inner recess (s) are circular, as was explained above with reference to FIG. 1.
  • the cross sections of the inner recess (s) are not circular, but are, for example, oval or triangular, and the sides of the triangle can be rounded slightly outward.
  • This alternative embodiment has the advantage that the shape of the inner recess (s) can be adapted to the course of the cutting edge and the course of the respective field in such a way that even when regrinding a blunt drill it is largely excluded that the regrinding of the
  • Walls surrounding the inner recess become so thin that the drill no longer withstands the load that occurs during a subsequent drilling process and is destroyed.
  • FIG. 2 shows a sketch to illustrate a view of a rod-shaped drill in the direction of the arrow x in FIG. 1, it being assumed that there is a drill with two oval-shaped inner recesses.
  • the drill shown in FIG. 2 has cutting edges S which are curved in the figure.
  • the inner recesses I in the area of the cutting edges are widened and therefore have a large cross-sectional area.
  • the inner recesses with a small cross-sectional area are also shown in FIG. 2 with dashed lines, as are present in the first end region E1 of the drill and extend from there over a large part of the drill length.
  • the inner recesses I are each positioned within a field F.
  • the chip chambers provided between the fields F are designated by SK.
  • the shape of the inner recesses I and their course within the fields F is advantageously chosen such that the inner recesses each have a first section AI, which runs essentially parallel to the cutting edge S, and a second section A2, which runs essentially parallel to the Edge of a field F runs. This ensures that the wall thickness of the wall surrounding the inner recess remains constant even when regrinding a blunt drill.
  • a rod-shaped body made of plastic mass is produced with at least one rectilinear inner recess. This can be done by extruding pasty sintered material, which consists of hard metal or ceramic powder mixed with a binder, through an extruder head. This extrusion takes place in a linear fashion
  • a third method step c the cut-to-length body is placed over its entire length on a support and subjected to a rolling movement in which a friction surface arrangement is used.
  • the speed of the rolling movement changes linearly and continuously over the length of the body, so that the body is twisted evenly. After this twisting, there is an inner recess that runs inside the body in a spiral or spiral shape.
  • the twisted body is introduced into a drying oven and dried there.
  • the chip chamber SK is introduced into the dried sintered material by means of a grinding wheel, which runs on the outer circumference of the body in a spiral or spiral shape.
  • the cross-sectional area of the inner recess in the second end region E2 of the drill is also increased by a grinding process.
  • step f the body subjected to the preprocessing described above is fed to a sintering furnace, in which it is sintered to form a sintering rod.
  • a further grinding wheel can be provided behind the sintering furnace for reworking the chip chambers.

Landscapes

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

Abstract

L'invention concerne un foret en forme de barre réalisé en métal dur ou en céramique. Ce foret présente dans le sens longitudinal une première zone terminale (E1) et une deuxième zone terminale (E2), la deuxième zone terminale étant dotée d'une arête de coupe (S). Le foret présente également sur sa circonférence dans le sens longitudinal au moins un logement de copeaux (SK) et a au moins un évidement interne (I) qui s'étend dans le sens longitudinal et par lequel s'écoule un liquide de refroidissement ou un agent lubrifiant qui est cédé à la zone de coupe du foret. L'aire de la section de l'évidement interne de la deuxième zone terminale du foret est plus grande que celle de la première zone terminale du foret. L'invention concerne également un procédé de production d'un tel foret.
PCT/EP2003/000619 2002-01-26 2003-01-23 Foret en forme de barre et son procede de production WO2003061898A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002102954 DE10202954B4 (de) 2002-01-26 2002-01-26 Verfahren zur Herstellung eines stabförmigen Bohrers aus Hartmetall oder Keramik
DE10202954.7 2002-01-26

Publications (1)

Publication Number Publication Date
WO2003061898A1 true WO2003061898A1 (fr) 2003-07-31

Family

ID=27588075

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/000619 WO2003061898A1 (fr) 2002-01-26 2003-01-23 Foret en forme de barre et son procede de production

Country Status (2)

Country Link
DE (1) DE10202954B4 (fr)
WO (1) WO2003061898A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7578726B2 (en) 2006-09-12 2009-08-25 Gebr. Brasseler Gmbh & Co. Kg Method of manufacturing a ceramic surgical instrument
US10814406B1 (en) * 2019-04-24 2020-10-27 Raytheon Technologies Corporation Internal cooling passages for rotating cutting tools

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014013210B4 (de) 2014-09-06 2021-10-21 Audi Ag Zerspanwerkzeug mit einem Kühlkanal
DE102014115760A1 (de) 2014-10-30 2016-05-04 Arno Friedrichs Schneidwerkzeug mit innenliegenden, spiralförmig verlaufenden Kühlmittelkanälen mit sich veränderndem Steigungswinkel
AT15226U1 (de) * 2016-05-20 2017-03-15 Ceratizit Austria Gmbh Verfahren zur pulvermetallurgischen Herstellung eines stabförmigen Körpers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1276446A2 (ru) * 1984-12-03 1986-12-15 Ленинградский Ордена Ленина И Ордена Красного Знамени Механический Институт Спиральное сверло
US5634747A (en) * 1992-12-10 1997-06-03 Sandvik Ab Spiral drill with coolant channels and method to manufacture a spiral drill
EP0852169A2 (fr) * 1995-03-02 1998-07-08 Sandvik Aktiebolag Foret comportant des canaux de refroidissement et procédé de fabrication dudit foret
DE19710996A1 (de) * 1997-03-17 1998-09-24 Afos Geraete Herstellungs Und Bohrwerkzeug und Schneideinsätze für Bohrungen i Vollmaterial und zum Aufbohren
WO2001017705A2 (fr) * 1999-09-09 2001-03-15 Arno Friedrichs Procede et dispositif de fabrication d'une ebauche en metal fritte dotee d'evidements internes helicoidaux

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7826701U1 (de) * 1978-12-14 Aesculap-Werke Ag Vormals Jetter & Scheerer, 7200 Tuttlingen Flüssigkeitsbeschicktes, drehbares Werkzeug
US2628073A (en) * 1951-03-26 1953-02-10 Herman L Kless Drill bit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1276446A2 (ru) * 1984-12-03 1986-12-15 Ленинградский Ордена Ленина И Ордена Красного Знамени Механический Институт Спиральное сверло
US5634747A (en) * 1992-12-10 1997-06-03 Sandvik Ab Spiral drill with coolant channels and method to manufacture a spiral drill
EP0852169A2 (fr) * 1995-03-02 1998-07-08 Sandvik Aktiebolag Foret comportant des canaux de refroidissement et procédé de fabrication dudit foret
DE19710996A1 (de) * 1997-03-17 1998-09-24 Afos Geraete Herstellungs Und Bohrwerkzeug und Schneideinsätze für Bohrungen i Vollmaterial und zum Aufbohren
WO2001017705A2 (fr) * 1999-09-09 2001-03-15 Arno Friedrichs Procede et dispositif de fabrication d'une ebauche en metal fritte dotee d'evidements internes helicoidaux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 198729, Derwent World Patents Index; Class P54, AN 1987-204781, XP002234012 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7578726B2 (en) 2006-09-12 2009-08-25 Gebr. Brasseler Gmbh & Co. Kg Method of manufacturing a ceramic surgical instrument
US10814406B1 (en) * 2019-04-24 2020-10-27 Raytheon Technologies Corporation Internal cooling passages for rotating cutting tools

Also Published As

Publication number Publication date
DE10202954B4 (de) 2006-07-27
DE10202954A1 (de) 2003-08-14

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