WO2012150058A1 - Outil de fraisage et/ou de perçage - Google Patents

Outil de fraisage et/ou de perçage Download PDF

Info

Publication number
WO2012150058A1
WO2012150058A1 PCT/EP2012/053770 EP2012053770W WO2012150058A1 WO 2012150058 A1 WO2012150058 A1 WO 2012150058A1 EP 2012053770 W EP2012053770 W EP 2012053770W WO 2012150058 A1 WO2012150058 A1 WO 2012150058A1
Authority
WO
WIPO (PCT)
Prior art keywords
working part
milling
drilling tool
shaft
tool according
Prior art date
Application number
PCT/EP2012/053770
Other languages
German (de)
English (en)
Inventor
Salvatore Palmisano
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012150058A1 publication Critical patent/WO2012150058A1/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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass
    • B21D37/205—Making cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • 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
    • B23P15/34—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools milling cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/08—Brazed connections
    • 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
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/02—Connections between the shanks and detachable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/03—Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank

Definitions

  • the working part is made from a blank by cutting, such as a grinding process.
  • the invention is based on a milling and / or drilling tool with a shank and a working part.
  • a "milling and / or boring tool” is to be understood as meaning, in particular, a tool for machining, preferably with a specific cutting edge, such as an end mill or a twist drill
  • the invention can also be applied to other tools familiar to the person skilled in the art
  • “Shank” should be understood to mean a preferably substantially cylindrical region of the tool, which may be provided, in particular, to be received by a tool holder of a processing machine.
  • a cylinder axis of the shaft preferably forms an axis of rotation of the tool.
  • the shank is preferably formed at least partially from a metal, in particular from a tool steel.
  • a "working part” is to be understood as meaning, in particular, a region of the tool which is provided for the chip-forming machining of a workpiece.
  • the working part of the tool can contain one or more cutting edges.
  • the working part is preferably at least partially made of a hard material.
  • the working part is preferably at least partially made of a harder material than the shaft. It can be achieved a particularly cost-effective production of the working part.
  • chip spaces of the working part can essentially be formed by the forming process. To complete the working part, in particular the cutting of the working part, only small amounts of material are removed by machining.
  • the working part is at least partially formed by a material strip twisted about an axis.
  • a “strip of material” is to be understood as meaning, in particular, a flat strip-shaped blank
  • the strip of material is oblong, that is to say a length of the strip of material is longer than a width
  • the thickness is less than half as large as the width of the material strip.
  • a material strip twisted about an axis is to be understood in this context, in particular, as a material strip in which one end of the material strip is opposite to one the end opposite the end of the strip of material about an axis around a
  • the material strip can be twisted or twisted by a torsional moment.
  • the material strip is preferably plastically deformed during rotation.
  • outer edges of the material strip can form a helix.
  • the material strip can be twisted about an axis of symmetry of the material strip.
  • the strip of material is rotated about the axis of rotation of the milling and / or drilling tool.
  • a basic form of the working part can be easily created.
  • gaps of the twisted strip of material can form chip spaces of the working part.
  • outer edges of the strip of material can form cutting edges of the working part.
  • the working part may preferably be formed in one piece.
  • in one piece should in particular be understood as being at least materially bonded and / or advantageously shaped in one piece, for example by production from a casting and / or by production in a one-component or multi-component injection molding process and / or by production in a single mold. tervon and advantageous from a single blank.
  • the working part can be produced particularly inexpensively.
  • the working part is at least partially made of a hard metal.
  • the working part is made of a hard metal strip.
  • a "cemented carbide” is to be understood as meaning in particular a sintered material, which predominantly consists of a reinforcement phase, the reinforcement phase preferably being formed at least predominantly by tungsten carbide, the cemented carbide preferably containing at least cobalt and / or nickel and / or molybdenum as a binder.
  • the hard metal consists of over 85% tungsten carbide.
  • the working part can be formed from a tool steel, preferably from a high-speed steel.
  • the working part may preferably be provided with a coating.
  • the working part can be particularly wear-resistant and durable.
  • a "receiving area” is to be understood as meaning, in particular, a region of the shaft which is shaped such that it can receive the working part,
  • the receiving area may preferably be formed in such a way that there is a large contact surface between the working part and the shaft forces can be transmitted particularly effectively from the working part to the shaft, deformations of the working part and / or of the shaft can be avoided, and the slot-shaped recess can preferably be slightly wider than one Thickness of the portion of the working part, which is received by the recess, so that a gap remains between the slit-shaped recess and the working part.in the gap, a fastening means, such as
  • Glue or in particular a solder are introduced.
  • the solder can surround the working part in the receiving area. There can be a balance between stresses that arise when the solder solidifies. It can be ensured a particularly stable connection between the working part and the receiving area.
  • the surface to be soldered can be comparatively small, in particular compared with working parts with dissolved cut. A distortion of the working part and / or the cutting and material stresses can be avoided.
  • the receiving area preferably has means for positioning the work piece.
  • the receiving area is designed so that it receives the working part in a defined position.
  • the receiving area can have a central recess.
  • the recess may preferably be formed as a center hole.
  • the working part can have a centering extension, which can be received by the centering bore.
  • Other conceivable embodiments of the receiving area and / or the means for positioning the working part that appear appropriate to a person skilled in the art are also conceivable. It can be achieved attachment of the working part on the shaft in a defined position and / or orientation. It can be made a high quality milling and / or drilling tool. When machining a workpiece with the milling and / or boring tool, particularly good machining results can be achieved.
  • soldered connection between the working part and the shaft.
  • a “soldered connection” should in particular be understood to mean a cohesive joining process, wherein a liquid phase is obtained by melting a
  • a brazing connection with a brazing filler metal is to be understood as being preferred, but other methods of joining known to the person skilled in the art are also conceivable:
  • a particularly high-quality connection between the shank and the working part can be achieved
  • a material structure and material properties of the shaft and / or of the working part can be obtained
  • the working part of the milling and / or drilling tool has at least one spiral-shaped cutting edge It is possible to achieve a particularly high level of machining performance, as chip removal of the chips from the machined workpiece can be particularly efficient, and a particularly high surface quality of the machined surface can be achieved become. Spiral cutting edges made in one piece with the working part may be more robust than straight cutting edges soldered to a working part.
  • a method for producing a milling and / or drilling tool according to the invention in which a material strip is rotated about an axis in a production step.
  • the material strip can be plastically deformed during rotation. It can be created in a cost-effective process step, the basic geometry of the working part.
  • the twisted strip of material contains the chip spaces that are required for chip removal.
  • the material strip and the shaft are preferably connected by means of a solder connection.
  • the material strip and the shaft can be connected particularly effectively. A distortion of the material strip and / or the shaft can be avoided. A change of the
  • Material structure of the material strip and / or the shaft can be avoided.
  • cutting be formed on the material strip by grinding in a further production step.
  • grinding should be understood to mean a machining with a geometrically undefined cutting edge, in particular grinding can be used to sharpen the cutting edges
  • a round-off error due to tolerances of the working part, the shaft and / or the connection of the working part to the shaft can be achieved by the
  • cutting should in particular be understood to mean peripheral and end cutting edges of the working part intended for machining a workpiece.
  • an undercut and a flat grinding can be done to form the cutting.
  • the chip spaces of the working part can be formed by the twisting of the material strip.
  • a machining of the chip spaces can be avoided. Costs and processing time can be saved. drawing
  • Fig. 1 is a schematic representation of a milling and / or drilling tool according to the invention.
  • Fig. 2 process steps for producing a milling and / or drilling tool according to the invention.
  • Figure 1 and Figure 2 show a milling and / or drilling tool and the steps of a manufacturing method for this milling and / or drilling tool, which is designed as an end mill 28.
  • the end mill 28 can be used for machining a workpiece, wherein the end mill 28 rotates about a rotation axis 30.
  • the end mill 28 has two peripheral cutting edges 24 and two end cutting edges 26.
  • the peripheral cutting edges 24 of a working part 12 are spirally formed and extend along edges in the longitudinal direction of the working part 12.
  • the end cutting edges 26 are arranged on the front side of the working part 12. About chip spaces 32 chips are transported away from the workpiece.
  • the end mill 28 has a shank 10 and the working part 12, the working part 12 being produced in part by a non-cutting shaping process.
  • the working part 12 is formed by a material strip 16 twisted about an axis 14.
  • the material strip 16 is rotated about its longitudinal axis 34, which represents the axis of rotation 30 of the end mill 28, by a little more than half a turn.
  • the working part 12 is made of hard metal.
  • the working part 12 is connected to an end receiving area 18 of the shaft 10 with this.
  • the receiving area 18 has means for positioning 20 of the working part 12.
  • the positioning means 20 include a recess which is formed as a centering bore 36. Further recesses 38 are slot-shaped.
  • the working part 12 is received with flanks 42 of the slot-shaped recesses 38, wherein a pin-shaped centering extension 40 of the working part 12 is received by the center hole 36.
  • the working part 12 is arranged on the shaft 10 that its longitudinal axis 34 and the longitudinal axis of the shaft 10 and the axis of rotation 30 of the end mill 28 have only small tolerances that can be compensated for a grinding of the end mill 28.
  • a solder joint 22 connects the working part 12 with the shaft 10.
  • the recess 38 is slightly wider than the thickness of the flanks 42 of the working part 12, which are received by the recess 38, so that between the recess 38 and the flanks 42 of the working part 12 a Gap 44 remains.
  • a fastening means in this case a solder 46, for fixing the working part 12 is introduced.
  • FIG. 2 shows essential steps of a method for producing an end mill 28 according to the invention.
  • a material strip 16 is rotated about an axis 14. In this case, the material strip 16 is plastically deformed and forms a working part 12. At one end of the material strip 16 has a pin-shaped centering extension 40 and flanks 42.
  • a shaft 10 is produced by a turning and milling process.
  • the working part 12 with the flanks 42 and the centering extension 40 is inserted into a receiving region 18 of the shaft 10 and connected thereto by a solder joint 22. Between the flanks 42 and a slot-shaped recess 38 of the shaft 10 remains a gap 44 into which a solder 46 can be introduced.
  • peripheral cutting edges 24 and end cutting edges 26 are formed on the material strip 16 by grinding.
  • the cutting edges 24, 26 are formed by an undercut and a flat grinding.

Landscapes

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

Abstract

L'invention concerne un outil de fraisage et/ou de perçage comprenant une tige (10) et un élément de travail (12). Selon l'invention, l'élément de travail (12) est fabriqué au moins en partie par un procédé de formage sans enlèvement de copeaux.
PCT/EP2012/053770 2011-05-05 2012-03-06 Outil de fraisage et/ou de perçage WO2012150058A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110075368 DE102011075368A1 (de) 2011-05-05 2011-05-05 Fräs- und/oder Bohrwerkzeug
DE102011075368.0 2011-05-05

Publications (1)

Publication Number Publication Date
WO2012150058A1 true WO2012150058A1 (fr) 2012-11-08

Family

ID=45819201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/053770 WO2012150058A1 (fr) 2011-05-05 2012-03-06 Outil de fraisage et/ou de perçage

Country Status (2)

Country Link
DE (1) DE102011075368A1 (fr)
WO (1) WO2012150058A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI606878B (zh) * 2016-12-06 2017-12-01 越有股份有限公司 搪孔治具

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014000866U1 (de) * 2014-02-03 2015-05-06 Johne & Co. Präzisionswerkzeuge GmbH Werkzeugkopfelement zum Fertigen eines Werkzeugkopfes, Werkzeugkopf und Werkzeugaufnahmemittel
CN105382506A (zh) * 2015-12-25 2016-03-09 苏州三骏工具科技有限公司 一种加长铣刀的加工工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191120513A (en) * 1911-09-16 1912-09-16 Arnold Mcturk Spencer Improvements in the Manufacture of Twist Drills and the like.
GB742281A (en) * 1953-09-15 1955-12-21 Joseph Alfred Labbee Jr Improvements relating to drill elements for drilling screw-receiving countersunk holes, and to drill attachments including such elements
CH331438A (de) * 1955-02-02 1958-07-31 Kunkel Alfred Gesteinsbohrer
GB1279238A (en) * 1968-05-17 1972-06-28 Marwin Cutting Tools Ltd Cutting tool face pieces
US3991454A (en) * 1974-02-11 1976-11-16 Marwin Cutting Tools Limited Flute pieces for engineers tools
WO1983001895A1 (fr) * 1981-12-03 1983-06-09 Bernard Weissman Ancrage dentaire

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191120513A (en) * 1911-09-16 1912-09-16 Arnold Mcturk Spencer Improvements in the Manufacture of Twist Drills and the like.
GB742281A (en) * 1953-09-15 1955-12-21 Joseph Alfred Labbee Jr Improvements relating to drill elements for drilling screw-receiving countersunk holes, and to drill attachments including such elements
CH331438A (de) * 1955-02-02 1958-07-31 Kunkel Alfred Gesteinsbohrer
GB1279238A (en) * 1968-05-17 1972-06-28 Marwin Cutting Tools Ltd Cutting tool face pieces
US3991454A (en) * 1974-02-11 1976-11-16 Marwin Cutting Tools Limited Flute pieces for engineers tools
WO1983001895A1 (fr) * 1981-12-03 1983-06-09 Bernard Weissman Ancrage dentaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI606878B (zh) * 2016-12-06 2017-12-01 越有股份有限公司 搪孔治具

Also Published As

Publication number Publication date
DE102011075368A1 (de) 2012-11-08

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