WO2005105351A1 - Interface pour outil de coupe - Google Patents

Interface pour outil de coupe Download PDF

Info

Publication number
WO2005105351A1
WO2005105351A1 PCT/EP2005/051800 EP2005051800W WO2005105351A1 WO 2005105351 A1 WO2005105351 A1 WO 2005105351A1 EP 2005051800 W EP2005051800 W EP 2005051800W WO 2005105351 A1 WO2005105351 A1 WO 2005105351A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting tool
recess
tool according
sealing surface
cutting
Prior art date
Application number
PCT/EP2005/051800
Other languages
German (de)
English (en)
Inventor
Günter Schweighöfer
Peter Müller
Original Assignee
Günther & Co. 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 Günther & Co. GmbH filed Critical Günther & Co. GmbH
Publication of WO2005105351A1 publication Critical patent/WO2005105351A1/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
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/28—Features relating to lubricating or cooling

Definitions

  • the present invention relates to a cutting tool, e.g. a drill or milling cutter with a cutting part, e.g. a drilling part, and a shaft part and at least one channel running within the cutting tool for the supply of coolant and / or lubricant from the shaft part to the cutting part.
  • a cutting tool e.g. a drill or milling cutter with a cutting part, e.g. a drilling part, and a shaft part and at least one channel running within the cutting tool for the supply of coolant and / or lubricant from the shaft part to the cutting part.
  • Such cutting tools have been known for a long time.
  • the drill has a drill part that carries the major and minor cutting edges that come into contact with the workpiece during machining and a shank part that is generally intended to be used in a tool chuck, e.g. a drill chuck, and therefore an interface between the cutting tool or the drill on the one hand and the machine tool, e.g. the drilling machine.
  • a tool chuck e.g. a drill chuck
  • the machine tool e.g. the drilling machine.
  • a coolant is fed to the cutting edges.
  • a lubricant is made available.
  • the cutting tool or the drill has at least one channel running inside the cutting tool for the supply of coolant and / or lubricant from the shaft part to the cutting part.
  • several such channels can also be provided, each of which transports the oil-air mixture to one of the cutting edges involved.
  • the minimal quantity lubrication via the inner channels poses various physical and technical problems.
  • the mixture is formed in two different ways.
  • so-called single-channel systems are known in which the corresponding mixture (aerosol) is formed before it enters the machine spindle.
  • so-called two-channel systems are known, in which oil and air are first transported separately into the tool in two different channels, oil being then injected into the air stream that is carried past at the tool-side end of the spindle.
  • the one-channel system has the advantage that, due to the use of very fine droplets, the risk of segregation is very low, so that the lubricant mixture is relatively insensitive to centrifugation at very high speeds.
  • the risk of segregation is very low, so that the lubricant mixture is relatively insensitive to centrifugation at very high speeds.
  • only a relatively limited proportion of oil can be achieved with this system.
  • the two-channel system has the advantage that large amounts of oil are also possible.
  • oil and air can be set separately.
  • the larger droplets formed in this system compared to the single-channel system make the lubricant mixture susceptible to segregation. In fact, at least partial segregation inevitably occurs, so that part of the oil flows along the channel walls. In order to provide the best possible minimum quantity lubrication, it is therefore necessary in particular to carefully carry out all interfaces on the way of transferring the minimum quantity lubrication mixture, since they can represent dead spaces and loss points.
  • dead spaces represent turbulence points that hinder the flow of the mixture.
  • they also increase the response time of the lubricant supply, which is generally switched off and on frequently with every tool change and even when the tool spindle is moved.
  • the lubricant mixture should ideally emerge from the tool as soon as it is switched on. Any dead spaces, however, prevent this since they first have to be filled with the required mixture. Even if the exact physical-technical process in the presence of dead spaces is still not understood, a clear increase in the response time can still be observed.
  • dead spaces lead to oil losses, which generally have to be blown out when changing tools and not only increase oil consumption, but also contaminate the inside of the machine with an oil film.
  • the present invention relates to improving the interface between the tool on the one hand and the chuck on the other.
  • the chuck generally has a screw in the chuck that is used for the length adjustment. With the help of the screw, length manufacturing tolerances and length losses due to regrinding can be compensated.
  • the screw head rests directly on the face of the shaft part.
  • hollow machining of grub screws is used in conventional machining with cooling lubricant and a slot is provided in the shaft end of the tool in order to establish a connection to the cooling channels.
  • the object is achieved in that the depression is rotationally symmetrical.
  • the formation of the recess in a rotationally symmetrical manner significantly improves the flow behavior, so that overall there is minimal quantity lubrication with a shorter response time.
  • the depression is advantageously designed to be rotationally symmetrical to the longitudinal axis of the cutting tool. This ensures that the recess can be made easily.
  • cutting tools can be realized with almost any number of channels for the supply of coolant and / or lubricant. The interface can therefore be used universally.
  • the depression can have any rotationally symmetrical shape.
  • the surfaces formed by the depression are advantageously curved, since additional dead spaces are thereby largely avoided and a favorable flow ratio is ensured.
  • a particularly preferred embodiment provides a recess which has the shape of a spherical cap or spherical cap.
  • this form of depression ensures favorable flow properties of the minimum quantity lubricant.
  • this geometry can be produced simply and inexpensively, for example by grinding with a grinding wheel.
  • the geometry according to the invention has proven itself in particular in the case of hard metal cutting tools or even solid carbide cutting tools, since tool machining is very complex in this type of tool, so that only simple geometries can be used for cost reasons. With the geometry according to the invention, a balanced compromise is thus made between good sealing properties and good flow properties on the one hand and simple, inexpensive producibility on the other.
  • an expedient embodiment provides that the end surface of the shaft part has a sealing surface which is arranged surrounding the recess. In the clamped tool, the sealing surface then engages with the preferably conical inner surface of the adjusting screw.
  • sealing surface is essentially conical.
  • the conical arrangement of the sealing surface effectively increases the sealing surface, so that the sealing function is improved.
  • the end surface of the shaft part is essentially frustoconical, the sealing surface being formed by the outer surface of the truncated cone. It is particularly expedient if the sealing surface is inclined perpendicular to the longitudinal axis of the cutting tool with respect to an imaginary plane.
  • the angle of inclination a i.e. the angle which the imaginary plane and the sealing surface enclose are greater than 15 °, preferably greater than 30 ° and particularly preferably between approximately 45 ° and approximately 60 °.
  • the sealing surface is advantageously made relatively large. It is particularly expedient if, in a plan view of the end surface of the shaft part, the width b of the sealing surface is at least 3% and preferably at least 5% of the shaft diameter d.
  • the depression has a maximum depth in relation to the shank end surface which is at least 3%, preferably at least 5%, particularly preferably at least 7% of the cutting tool diameter.
  • FIG. 1 shows a top view and a sectional view of a first embodiment of the shank part according to the invention of a drill
  • FIG. 2 shows a top view and a sectional view of a second embodiment of the shank part according to the invention
  • FIG. 3 shows a top view and a sectional view of a third embodiment of a shank part according to the invention
  • Figure 4 is a sectional view of the first embodiment together with a corresponding adjusting screw in the clamped state.
  • FIG. 1 shows a first embodiment of a shaft part according to the invention in a plan view of the shaft end face and a partial sectional view.
  • the partial sectional view shown in the lower part of FIG. 1 shows the shank part of the cutting tool with two channels 2 for coolants and / or lubricants.
  • the partial shaft end face, which is oriented downward in the sectional view shown in FIG. 1, has a recess 3 which is designed in the form of a spherical cap.
  • the two channels 2 each end in the depression 3.
  • the depression 3 is arranged rotationally symmetrically about the central cutting tool axis 6.
  • a circular sealing surface 4 is arranged on the outer sides of the shaft partial end surface, which is inclined in such a way that the surfaces enclose an angle of approximately 45 ° with an imaginary plane that runs perpendicular to the longitudinal axis 6 of the cutting tool.
  • a narrow circular ring surface 5 is provided, which lies essentially in an imaginary plane that is perpendicular to the longitudinal axis 6 of the cutting tool.
  • cooling channels 2 are arbitrary. Therefore, two further embodiments of the shaft part according to the invention are shown in FIGS. 2 and 3, which have three or a cooling channel 2.
  • FIG. 4 shows an example of the embodiment of the shaft part 1 known from FIG. 1 in engagement with the adjusting screw 7 of the tool chuck.
  • the adjusting screw 7 has a head with an inner cone 8.
  • the shaft part 1 is now brought into contact with the adjusting screw 7 such that the conical or frustoconical sealing surface 4 of the shaft part 1 comes into contact with the inner cone 8 of the adjusting screw 7. Because the sealing surface 4 is not, as is occasionally the case in the prior art, partially interrupted by a transverse groove, a very tight connection between the shaft part 1 on the one hand and the adjusting screw 7 on the other hand is achieved.
  • the lubricant mixture can then be supplied via the tool chuck into which the adjusting screw 7 is screwed, via the central channel in the adjusting screw 7. Due to the spherical cap shape of the recess 3 of the shaft part 1, there is a very even flow through the space, which is formed on the one hand by the inner cone 8 of the adjusting screw 7 and on the other hand by the spherical cap-shaped recess 3 of the shaft part 1. Overall, a very direct minimum quantity lubrication metering with a very short response time and a very small dead space volume can be achieved by the configuration of the shaft part 1 according to the invention.

Landscapes

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

Abstract

La présente invention concerne un outil de coupe comprenant une partie de coupe et une partie manche (1), ainsi qu'au moins un canal (2) qui s'étend à l'intérieur de l'outil de coupe et sert à l'alimentation en agent de refroidissement et/ou en lubrifiant, de la partie manche (1) à la partie de coupe. Selon l'invention, la surface d'extrémité de la partie manche (1) présente une partie en retrait (3) dans laquelle peut se trouver au moins une ouverture d'entrée du canal/des canaux (2) destiné(s) à l'alimentation en agent de refroidissement et/ou en lubrifiant. La présente a pour objet la mise à disposition d'un outil de coupe de ce type, qui se caractérise par des propriétés d'écoulement et un comportement d'étanchéité améliorés par rapport à l'état de la technique, et qui est simple de réalisation. A cet effet, la partie en retrait (3) présente une symétrie de rotation.
PCT/EP2005/051800 2004-04-29 2005-04-22 Interface pour outil de coupe WO2005105351A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004021190.6 2004-04-29
DE200410021190 DE102004021190A1 (de) 2004-04-29 2004-04-29 Schnittstelle für ein Schneidwerkzeug

Publications (1)

Publication Number Publication Date
WO2005105351A1 true WO2005105351A1 (fr) 2005-11-10

Family

ID=34965495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/051800 WO2005105351A1 (fr) 2004-04-29 2005-04-22 Interface pour outil de coupe

Country Status (2)

Country Link
DE (1) DE102004021190A1 (fr)
WO (1) WO2005105351A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080260479A1 (en) * 2005-10-11 2008-10-23 Dirk Kammermeier Device for supplying coolant into a shank of a rotary tool as well as a rotary tool, in particular a drill
EP2196273A1 (fr) * 2008-12-11 2010-06-16 Gühring OHG Interface entre un outil à pointe émoussée et un poste de transfert d'agent lubrifiant dans une réception d'outils
US11097359B2 (en) 2019-07-17 2021-08-24 Ford Global Technologies, Llc Minimum quantity lubrication multidiameter cutting tool oil delivery

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238477A2 (fr) * 1986-03-18 1987-09-23 BÖHLER Gesellschaft m.b.H. Outil de coupe rotatif
DE3709647A1 (de) * 1987-03-24 1988-10-13 Guehring Gottlieb Fa Mit innenliegenden kuehlkanaelen ausgestattetes bohrwerkzeug mit zumindest zwei spannuten
WO2003020462A1 (fr) * 2001-08-29 2003-03-13 Arno Friedrichs Outil en forme de barre servant à l'usinage de pièces
EP1325785A1 (fr) * 2000-07-14 2003-07-09 Sumitomo Electric Industries, Ltd. Outil de decoupe jetable
WO2004009288A1 (fr) * 2002-07-18 2004-01-29 Horkos Corp Porte-outil d'une machine-outil
DE10347755A1 (de) * 2003-01-14 2004-07-29 Gühring, Jörg, Dr. Schaftwerkzeug, insbesondere Bohrungsnachbearbeitungswerkzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322189A (en) * 1980-03-13 1982-03-30 Briese Leonard A Coolant control for milling tools
FR2730588B1 (fr) * 1995-02-13 1997-03-28 Cinch Connecteurs Sa Perfectionnements aux connecteurs electriques
DE19728157A1 (de) * 1997-07-03 1999-01-07 Beck August Gmbh Co Rotierendes Schaftwerkzeug und Verfahren zu dessen Herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238477A2 (fr) * 1986-03-18 1987-09-23 BÖHLER Gesellschaft m.b.H. Outil de coupe rotatif
DE3709647A1 (de) * 1987-03-24 1988-10-13 Guehring Gottlieb Fa Mit innenliegenden kuehlkanaelen ausgestattetes bohrwerkzeug mit zumindest zwei spannuten
EP1325785A1 (fr) * 2000-07-14 2003-07-09 Sumitomo Electric Industries, Ltd. Outil de decoupe jetable
WO2003020462A1 (fr) * 2001-08-29 2003-03-13 Arno Friedrichs Outil en forme de barre servant à l'usinage de pièces
WO2004009288A1 (fr) * 2002-07-18 2004-01-29 Horkos Corp Porte-outil d'une machine-outil
DE10347755A1 (de) * 2003-01-14 2004-07-29 Gühring, Jörg, Dr. Schaftwerkzeug, insbesondere Bohrungsnachbearbeitungswerkzeug

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080260479A1 (en) * 2005-10-11 2008-10-23 Dirk Kammermeier Device for supplying coolant into a shank of a rotary tool as well as a rotary tool, in particular a drill
US8251621B2 (en) * 2005-10-11 2012-08-28 Kennametal Inc. Device for supplying coolant into a shank of a rotary tool as well as a rotary tool, in particular a drill
EP2196273A1 (fr) * 2008-12-11 2010-06-16 Gühring OHG Interface entre un outil à pointe émoussée et un poste de transfert d'agent lubrifiant dans une réception d'outils
US11097359B2 (en) 2019-07-17 2021-08-24 Ford Global Technologies, Llc Minimum quantity lubrication multidiameter cutting tool oil delivery

Also Published As

Publication number Publication date
DE102004021190A1 (de) 2005-12-29

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