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WO2007025679A1 - Outil d'usinage de pieces par enlevement de matiere - Google Patents

Outil d'usinage de pieces par enlevement de matiere Download PDF

Info

Publication number
WO2007025679A1
WO2007025679A1 PCT/EP2006/008348 EP2006008348W WO2007025679A1 WO 2007025679 A1 WO2007025679 A1 WO 2007025679A1 EP 2006008348 W EP2006008348 W EP 2006008348W WO 2007025679 A1 WO2007025679 A1 WO 2007025679A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
tool
shaft
material layer
hard material
Prior art date
Application number
PCT/EP2006/008348
Other languages
German (de)
English (en)
Inventor
Dieter Kress
Friedrich Häberle
Original Assignee
MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress 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 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG filed Critical MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG
Publication of WO2007025679A1 publication Critical patent/WO2007025679A1/fr

Links

Classifications

    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/12—Boron nitride
    • B23C2226/125—Boron nitride cubic [CBN]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/31—Diamond
    • B23C2226/315—Diamond polycrystalline [PCD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2240/00—Details of connections of tools or workpieces
    • B23C2240/08—Brazed connections

Definitions

  • the invention relates to a tool for machining workpieces according to the preamble of claim 1 and a method for producing a tool for machining workpieces according to the preamble of claim 21.
  • the shaft is too small, as that individual lots could be brought separately to soldering temperature.
  • the entire tool is so hot that already soldered blanks would solve when soldering more blanks again.
  • the soldering surface available for fastening the cutting edges is so small with such small tool diameters that the cutting edges in the tool hold relatively poorly or only little bear in the tooling. workers. The smaller the diameter of the tool, the smaller the hold of the cutting edges.
  • a tool which has the features mentioned in claim 1. It is characterized by a head attached to a shaft, which is fastened by means of a soldering process and has a hard material layer in the region of its end face, in the region of which at least parts of the geometrically defined cutting edge are provided.
  • said head of the tool is provided with a hard material layer, in the area of which the cutting edges of the tool are realized, it is no longer necessary to use individual cutting polycrystalline boron nitride or polycrystalline diamond in the tool. Since the hard material layer extends over a larger area of the head, it is very well connected to the head so that the geometrically defined cutting edges provided in the area of the hard material layer can absorb high cutting forces.
  • the object of the invention is also to provide a method by means of which tools for machining workpieces can be produced which do not have the abovementioned disadvantages.
  • a method with the features of claim 21 is proposed, in which a head is soldered to a shank of a tool.
  • the head preferably before attachment to the shaft, provided with a hard material layer.
  • At least in this at least one groove is introduced to realize at least one geometrically defined cutting edge. It is therefore essential that after placing the head on the shank of the tool a hard material layer is ready, in which at least one cutting edge can be incorporated. It is therefore no longer necessary to solder individual cutting into the tool.
  • Figure 1 is a schematic diagram of a blank of a tool in
  • Figure 2 is a perspective bottom view of a head of the blank according to Figure 1 and
  • Figure 3 is a perspective view of a finished tool.
  • the blank of a tool 1 shown in FIG. 1 comprises a shaft 3 and a head 5 arranged here in an exploded view at a distance from the shaft.
  • the shaft 3 is essentially cylindrical and has a uniform length over the length shown here Outside diameter on.
  • the head 5 facing away from the end 7 of the Shaft 3 is broken off, so that its design is not recognizable here. It should be noted here that this end 7 have a larger outer diameter and may be specially designed to allow the inclusion in a machine tool or in an intermediate piece, an adapter or the like.
  • an end face 11 is provided which lies in an imaginary plane on which the central axis 13 of the tool 1 is perpendicular.
  • the tool 1 is usually set in rotation during the machining of workpieces and thus rotates about the central axis 13, while it is brought into engagement with a workpiece to be machined. In principle, however, it is also possible to hold the tool 1 and to set the workpiece in rotation. Decisive is a relative rotation between tool 1 and workpiece.
  • the schematic diagram shows that a first structure 15 is introduced into the end face 11, in this case at least one V-shaped groove extending over the entire cross section of the end face 11 and extending along an imaginary diameter line, that is to say the center axis 13 cuts.
  • the head 5 is provided on its the shaft 3 and thus the end face 11 facing abutment surface 17 with a second structure 19 which engages in the first structure 15. As a result, an introduced into the shaft 3 torque on the head 5 can be transferred.
  • a hard material layer 21 On the opposite side of the contact surface 17 of the head 5 is provided with a hard material layer 21 whose thickness to the later Embodiment of the head 5 is adjusted.
  • the hard material layer 21 extends over the whole, the contact surface 17 opposite end face 23 of the head 5.
  • a hard ring on the end face 21 can be applied, whose diameter is adapted to the subsequent use of the head 5.
  • the end face 23 is arranged in an imaginary plane on which the central axis 13 is perpendicular. Since the contact surface 17 is located in an imaginary plane on which the central axis 13 is perpendicular, the end face 23 extends parallel to the contact surface 17. Since the hard material layer 21 is formed here with a uniform continuous thickness, the surface 25 is also in an imaginary plane arranged on which the central axis 13 is vertical.
  • the tool 1 is characterized in that the head 5 is soldered onto the shaft 3.
  • the distance between the contact surface 17 and the hard material layer 21, ie the length of the head 5 measured in the direction of the central axis 13, can be selected such that the contact area between the contact surface 17 of the head 5 and the end surface 11 of the shaft 3 during the soldering process Heat does not damage the hard material layer 21.
  • FIG. 2 shows a perspective bottom view of the head 5 of the tool 1 according to FIG. 1. Identical parts are provided with the same reference numerals, so that reference is made to the preceding description in order to avoid repetition.
  • the head 5 is opposite to that in FIG 1 chosen significantly enlarged. He is also essentially cylindrical.
  • a second structure 19 having at least one elevation is realized on the contact surface 17 of the head 5 facing the observer. This is chosen so that it can engage in a first structure 15 on the end face 11 of the shaft 3.
  • the tool 1 described here is also realized with very small diameters, ie that the structures on the one hand on the end face 11, on the other hand on the contact surface 17 are very small. Therefore, these are preferably produced by means of non-cutting processes, for example by laser or erosion processes, wherein elevations of the structures are preferably produced by die erosion and depressions, preferably by wire erosion.
  • a second structure 19 is realized on the contact surface 17 of the head 5, which comprises two running along imaginary diameter lines, mutually perpendicular ribs 27 and 29, whose cross-section is triangular or V-shaped.
  • Other cross-sectional shapes are also possible. They do not have to be selected identically as the cross-sectional shape of the ribs 27, 29 absorb- The grooves of the first structure 15. They only have to be suitable to intervene in the grooves with as little play as possible.
  • the mutually perpendicular ribs 27 and 29 thus engage in correspondingly arranged, the first structure 15 representing depressions in the end face 11 of the shaft 3 a. They cause because of the arrangement chosen here a centering of the head 5 on the shaft 3, so that the connection between the head 5 and shaft 3 can be realized in a simple manner: It requires no special means to center the two parts during the connection process. If two mutually perpendicular grooves are provided on the end face 11 of the shaft 3, one of which can be seen in Figure 1, it is basically sufficient to provide on the contact surface 17 of the head 5 projections, preferably because of the centering at least three, in the engage the first structure 15 forming gutters. A maximum torque can, however, be transmitted if, as shown in FIG. 2, for the implementation of the second structure 19, grooves 27 and 29 running perpendicular to one another over the diameter of the contact surface 17 are provided, which run into corresponding grooves of the first structure 15 engage on the end face 11.
  • first and second structures complementary, because this results in the largest contact surfaces and the possibility of transmitting a maximum torque.
  • Figure 1 shows a tool 1 before the introduction of special external structures, ie a blank. If the head 5 is soldered to the shaft 3, according to FIG. 1, a continuously cylindrical tool 1 is formed, which has a uniform outer diameter over the length visible here, that is to say passes smoothly from the shaft 3 to the head 5.
  • At least one groove N can be introduced into the peripheral surface of the blank, that is to say into the circumferential surface U1 of the head 5 and optionally the peripheral surface U2 of the shaft 3. This should extend at least over the thickness of the hard material layer 21 in order to form a geometrically defined cutting edge here.
  • a groove N designed as a chip groove, is provided as seen in the direction of rotation of the tool 1. This extends at least over the region of the active cutting edge, ie the cutting edge, which engages with a workpiece to be machined.
  • the cutting edge and the groove N extend not only over the thickness of the hard material layer but at least over the length of the head 5 and preferably also extend into the shaft 3.
  • the at least one groove N serving to produce the at least one cutting edge is preferably arranged in the peripheral surface of the tool 1 such that it does not damage the first structure 5 and the second structure 19. It is therefore preferably on it ensured that an introduced into the peripheral surface of the tool 1 groove intersects neither one of the ribs 27 nor one of the recesses in the end face 11 of the shaft 3. As a result, the structures remain over the entire diameter of the tool 1 and can transmit a maximum torque.
  • the at least one groove N which extends in the peripheral surface of the tool 1 at least over the thickness of the hard material layer 1 measured in the direction of the longitudinal axis 13, can run parallel to the central axis 13 or along an imaginary screw line which runs concentrically to the central axis 13 ,
  • the tool 1 as a milling cutter, drill, reamer or the like.
  • the hard material layer 21 has a large contact surface on the front side 23 of the head 5, that is to say it can absorb large forces. In this case, it is relatively easy to machine the hard material layer 21 in order to realize desired cutting edges, which can also extend into the upper side 25 of the hard material layer 21. It becomes clear that during the production of the cutting no soldering is necessary. Only the head 5 needs to be soldered onto the shank 3 to make the blank of the tool 1, which can then be machined in a suitable cutting or non-cutting manner to produce cutting, chip grooves, and other desired geometries. Preferably, the hard material layer 21 is applied to the end face 23 of the head 5, before it is soldered to the shaft 3.
  • Figures 1 and 2 also show that the method of manufacturing the tool 1 is very simple. It only requires the realization of a first structure 15 on the end face 11 of the shaft 3 and a second structure 19 on the contact surface 17 of the head 5 in order to transmit a torque from the shaft 3 to the head 5 easily.
  • the structures 15 and 19 are formed so that the head 5 automatically centered on the shaft 3, while it is soldered to the shaft.
  • the hard material layer 21 on the end face 23 of the head 5 is possible in a simple, known manner.
  • a polycrystalline boron nitride (PKB) layer or a polycrystalline diamond (PCD) layer is realized here.
  • the head 5 can be cut out of a basic element, also referred to as a blank, preferably in a non-cutting process, in particular by means of a laser or by means of wire erosion. It is very possible to realize a peripheral surface 111 of the head 5, which deviates from the cylindrical surface shown in Figure 1, and already more or less corresponds to the desired outer contour of the finished tool 1. Here, only one grinding operation of the head 5 is required, in order in particular to configure its hard material layer 21 in such a way that desired cutting edges are realized here.
  • the outer contour of the head 5 is the same over its entire length.
  • the specification of a certain outer contour of the head 5 prior to soldering on the shaft 3 is particularly useful if a PCD layer is selected for the hard material layer 21, the processing is time-consuming and expensive due to the particular hardness. If the outer contour of the finished tool is already predetermined at least in the region of the head 5, only slight grinding work is required to complete the tool 1 or the at least one cutting edge in the region of the hard material layer 21.
  • a finished tool 1 is shown in FIG. It has a shaft 3 and a head 5, which is soldered here on the end face 11 of the shaft 3, so that its contact surface 17 abuts seamlessly against the end face 11.
  • the hard material layer 21 is provided.
  • a complete tool 1 is shown.
  • the shaft 3 here transitions into a fastening region 31 which has a larger outer diameter than the shaft 3 and is adapted to the receptacle of a machine tool, an adapter, an intermediate piece or the like is so that the tool 1 can be easily attached.
  • the blank of the tool 1 may have before working out the contour of the shaft 3 and the head 5 over its entire length a constant diameter and a uniform outer contour.
  • the outer contour of the head 5 continues in the shaft 3, so that chip grooves provided in the region of the circumferential surface U1 of the head 5 continue to run without any projections in the area of the peripheral surface U2 of the shaft 3.
  • the tool 1 is very simple and easy to produce.
  • the head is made of hard metal.
  • the shaft can be made of carbide or steel.
  • the hard material layer 21 preferably consists of PKB or PKD.
  • the hard material layer 21 preferably rests over its entire surface on the end face 23 of the head 5 and thus is firmly connected to this and can absorb high forces.
  • it is relatively easy, even with very small diameters of the tool 1, the head 5 with the hard material layer 21 on the shaft 3 festzulö- and then to realize the desired cutting edges and other geometries.
  • the hard material layer 21 can also be formed annularly, at least if only in the peripheral region of the head 5 cutting are to be provided, and in particular when the tool has a coolant supply, which opens into the end face 23 of the head 5.
  • the tool 1 is very simple, so that its production is inexpensive feasible. It turns out that only on the front side 23 of the head 5 a hard material layer 21 is required and this only in the area of the contact surface U of the head 5 of the tool 1. It is relatively easy to apply to the end face 23, this hard material layer 21, either a quasi-continuous disc forms on the end face 23, or a ring which extends along the peripheral surface U1 of the head 5.
  • At least one, preferably a plurality of grooves are made in its peripheral surface, that is, in the peripheral surface U1 of the head 5 and in the peripheral surface U2 of the shaft 3. cut material layer 21.
  • the contour of the at least one groove N is selected so that a side edge of the groove forms a cutting edge of the tool 1. Thus, if several grooves are introduced into the tool 1, this has correspondingly more cutting edges.
  • the groove N passing through the end face 23 and the hard material layer 21 forms a cutting edge in the hard material layer.
  • this groove N also forms a cutting edge in the head 5 and possibly also in the shaft 3.
  • the thickness of the hard material layer 21 defines the length of the particularly resistant cutting edge of the tool 1. The thickness of the hard material layer 21 is thus selected so that the particularly stressed areas of the cutting edge run in this hard material layer.
  • the hard material layer 21 is relatively easy to apply to the end face 23 and its thickness defines the length of the region of the cutting edge which is particularly resistant.
  • the width of the ring is made greater than or equal to the depth of the groove N.
  • a tool 1 wherein the width of the hard material ring is selected so that it is at least slightly larger than the depth of the groove.

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

Abstract

L'invention concerne un outil d'usinage de pièces par enlèvement de matière comprenant au moins une lame à géométrie définie, une tige (3) présentant une face frontale (11 ), une tête (5) qui est fixée à la tige (3) et présente une face d'appui (17) et une face frontale (23). La face d'appui (17) est en contact avec la face frontale (11) de la tige. La face frontale (11 ) de la tige (3) a une première structure (15). La tête (5) comprend, sur sa face d'appui (17) tournée vers la face frontale (11 ), une deuxième structure (19), l'une est l'autre structure étant réalisées de telle façon qu'une structure entre en prise avec l'autre structure pour qu'un couple de rotation appliqué à la tige (3) soit transmis à la tête (5). L'outil est caractérisé en ce que la tête (5) puisse être brasée sur la tige (3). La tête (5) présente, sur sa face frontale (23), une couche de matière dure (21 ). Et la lame à géométrie définie est ébauchée au moins partiellement dans la couche de matière dure (21 ).
PCT/EP2006/008348 2005-08-29 2006-08-25 Outil d'usinage de pieces par enlevement de matiere WO2007025679A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005041331.5 2005-08-29
DE200510041331 DE102005041331A1 (de) 2005-08-29 2005-08-29 Werkzeug zur spanenden Bearbeitung von Werkstücken

Publications (1)

Publication Number Publication Date
WO2007025679A1 true WO2007025679A1 (fr) 2007-03-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/008348 WO2007025679A1 (fr) 2005-08-29 2006-08-25 Outil d'usinage de pieces par enlevement de matiere

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DE (1) DE102005041331A1 (fr)
WO (1) WO2007025679A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112719388A (zh) * 2021-01-18 2021-04-30 东莞市好刀精工科技有限公司 一种散热性能良好且可降低震动幅度的四刃偏心圆角铣刀

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006000251A1 (de) * 2006-05-30 2007-12-06 Hilti Ag Hartstoffkopf und Drehschlagbohrer
DE102008064543B4 (de) * 2008-12-19 2015-02-26 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Reibahle und Messerplatten
DE102014209135B3 (de) * 2014-05-14 2015-11-05 Kennametal Inc. Werkzeugkopf und Rotationswerkzeug mit einem solchen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019461A1 (fr) * 1979-05-16 1980-11-26 De Beers Industrial Diamond Division (Proprietary) Limited Corps abrasifs
US4802799A (en) * 1987-06-10 1989-02-07 Marken Tool Company Drill bit
WO1993002823A1 (fr) * 1991-08-08 1993-02-18 Habit Diamond Limited Outils resistants a l'usure
WO1998019813A1 (fr) * 1996-11-04 1998-05-14 Seco Tools Ab Outil pour usinage par enlevement de copeaux

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100663222B1 (ko) * 2000-07-14 2007-01-03 스미토모덴키고교가부시키가이샤 스로어웨이식 절삭 공구
DE10333340A1 (de) * 2003-07-23 2005-02-17 Kennametal Inc. Bohrer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019461A1 (fr) * 1979-05-16 1980-11-26 De Beers Industrial Diamond Division (Proprietary) Limited Corps abrasifs
US4802799A (en) * 1987-06-10 1989-02-07 Marken Tool Company Drill bit
WO1993002823A1 (fr) * 1991-08-08 1993-02-18 Habit Diamond Limited Outils resistants a l'usure
WO1998019813A1 (fr) * 1996-11-04 1998-05-14 Seco Tools Ab Outil pour usinage par enlevement de copeaux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112719388A (zh) * 2021-01-18 2021-04-30 东莞市好刀精工科技有限公司 一种散热性能良好且可降低震动幅度的四刃偏心圆角铣刀
CN112719388B (zh) * 2021-01-18 2021-12-14 东莞市好刀精工科技有限公司 一种散热性能良好且可降低震动幅度的四刃偏心圆角铣刀

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Publication number Publication date
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