EP3344412A1 - Porte-outil - Google Patents

Porte-outil

Info

Publication number
EP3344412A1
EP3344412A1 EP16753335.5A EP16753335A EP3344412A1 EP 3344412 A1 EP3344412 A1 EP 3344412A1 EP 16753335 A EP16753335 A EP 16753335A EP 3344412 A1 EP3344412 A1 EP 3344412A1
Authority
EP
European Patent Office
Prior art keywords
tool holder
coolant
section
tool
connecting portion
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.)
Withdrawn
Application number
EP16753335.5A
Other languages
German (de)
English (en)
Inventor
Gaston Schwenk
Jens Ketelaer
Manuel Praetorius
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.)
Sauer GmbH and Co KG
Original Assignee
Sauer GmbH 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 Sauer GmbH and Co KG filed Critical Sauer GmbH and Co KG
Publication of EP3344412A1 publication Critical patent/EP3344412A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • B23Q11/1023—Tool holders, or tools in general specially adapted for receiving the cutting liquid from the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B23B29/12—Special arrangements on tool holders
    • B23B29/125—Vibratory toolholders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B37/00—Boring by making use of vibrations of ultrasonic frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/24—Cooling or lubrication means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/108—Piezoelectric elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/10—Use of ultrasound

Definitions

  • the present invention relates to a tool holder for holding a tool, comprising a housing, a transmission member movably disposed in the housing for transmitting movement to the tool received at a first end portion of the tool holder, a fixing portion at a second end portion opposite to the first end portion of the tool holder the tool holder for fixing the tool holder to a machine tool, and a coolant conduit portion for guiding coolant from the second end portion of the tool holder to the first end portion of the tool holder.
  • EP 1 480 783 B1 describes a machine tool having a spindle which has a tool holder for a replaceable tool holder, which is clamped in operation of the machine tool in the tool holder and which has a coolant tube for receiving a coolant lubricant, further having a inside of the spindle arranged first channel having an outlet opening, which opens within the tool holder, wherein the coolant tube engages with clamped tool holder in the outlet opening of the first channel, wherein the first channel includes a continuous inner tube, the first end is connected to an aerosol source and the second end to the accurate Connection to the coolant tube is formed.
  • EP 1 763 416 B1 describes a tool with a tool holder and a spindle nose, wherein the tool holder has a tool holder receptacle for adapting to the rotatable spindle nose at a first end, and a tool holder at a second end, and with a tool head insertable into the tool holder the tool holder and the spindle nose form a vibration motor and the vibration motor oscillates the tool holder via a piezo system and the piezo system comprises a first stationary coil and a second coil spaced therefrom and engaging the tool holder, the second coil having piezo coils. Actuators is connected.
  • one end of the coolant tube in the direction of the spindle is fixedly connected to the housing of the oscillating tool holder.
  • the tube must be sealed by means of a suitable sealing element accordingly.
  • This sealing element is located close to the vibration node of the oscillating system in order to avoid loads on the sealing element due to the continuous oscillatory movement.
  • the problem occurs that the pipe cross-section and the coolant flow to be achieved is too low to ensure optimum cooling of the tool.
  • the vibration drive can not be cooled sufficiently well.
  • the tool holder according to the invention for receiving a tool comprises: a housing, a transmission element arranged movably in the housing for transmitting a movement to the tool received at a first end portion of the tool holder, a fastening portion at a second, the first End portion of the tool holder opposite end portion of the tool holder for attaching the tool holder to a machine tool, and a coolant line for directing coolant from the second end portion of the tool holder to the first end portion of the tool holder, wherein thedestofftechnischsabites has a passing through the transmission element first portion, and wherein the first section is at least partially formed as a bore in the transmission element.
  • the coolant line section consists of the parts of the tool holder that come into contact with the coolant. If the coolant flows directly through the bore in the moving part of the toolholder instead of through a thin-walled, separate tube (which may easily be damaged during assembly, for example), this increases the stability of the design. For example, the transmission element can be vibrated and this vibration transmitted to the tool. The housing and the mounting portion of the tool holder do not swing with it. The coolant is thus passed on its way to the tool through a non-oscillating section and through a swinging portion of the tool holder.
  • the construction according to the invention can be dispensed with a double-walled coolant feedthrough, so that a larger cross-section can be used to direct the coolant to the tool, whereby the volume flow of the guided in the direction of the tool coolant can be increased.
  • the pressure with which the coolant is passed through the coolant line section can be increased due to the greater wall thickness of the coolant channel and the associated increased pressure resistance of the structure. As a result, the tool and portions of the tool holder in the vicinity of the bore can be better cooled. Ultimately, a higher precision in the workpiece machining is achieved.
  • the coolant line section preferably has a second partial section running through the fastening section, wherein the first partial section and the second partial section are arranged so as to be movable relative to one another.
  • the coolant line section may also consist of three or more sections, which are movable relative to each other.
  • the first partial section preferably has a first connecting section for connection to the second partial section at an end facing the second partial section, and the second partial section has a second connecting section for connection to the first partial section at an end facing the first partial section, wherein the first connecting section and the second connecting portion are joined together.
  • Such a design of the connection of both, mutually movable sections of the coolant line section has the advantage that the two connecting portions always overlap even with a movement of parts of the tool holder and is thus ensured that a continuous coolant channel is in the tool holder.
  • the first connecting portion is formed as a hollow pin and arranged on the first portion of thedeleiel einsabitess that the bore in the transmission element is continued by an interior of the hollow pin, and preferably the second connecting portion surrounds the first connecting portion circumferentially for introducing the coolant from the second portion in the first section.
  • the tool holder has a sealing element disposed between the first connecting portion and the second connecting portion for sealing against leakage of coolant from the coolant conduit portion.
  • the sealing element is designed as a ring made of plastic, which is connected to a Outside wall of the first connecting portion is pressed.
  • connection between the first subsection and the second subsection of the coolant conduit section can be reliably sealed.
  • the outer wall of the first connecting portion is ground.
  • the tool holder has an ultrasonic transducer connected to the transmission element for generating an ultrasonic vibration for the tool, wherein the ultrasonic transducer, the transmission element and the first section of the coolant line section form a vibratory system in the housing, the coolant line section is arranged centrally in the tool holder, and Ultrasonic transducer surrounds the bore in the transmission element for cooling the ultrasonic transducer by the coolant in the bore at least partially.
  • Such an arrangement of the coolant-carrying elements of the tool holder and the ultrasonic transducer in the tool holder has the advantage that the coolant can be used not only to cool the tool, but also to cool the ultrasonic transducer. This is particularly important in order to prevent a heating-related change in the vibration parameters of the oscillatory system and the tool.
  • the sealing of the first and second connecting sections must take place at the point of maximum oscillation amplitude. Therefore, in such a tool holder, it is all the more important that the surface of the first connection portion is smooth ground to prevent abrasion of the sealing material.
  • the bore in the transmission element is formed so that the coolant passes through the transmission element using a flow cross-section of at least 4.9 mm 2 and / or at a pressure of at least 60 bar.
  • the bore may have a diameter of 2.5 mm.
  • the full width of the bore can be used for passing coolant, resulting in a 20% higher volume flow compared to conventional coolant passages and to a pressure of the coolant from to leads to 80 bar in the tool holder. This increases above all the efficiency of the internal cooling, but also the tool cooling.
  • the first subsection comprises a branch and the transfer section comprises a plurality of openings of the coolant conduit section such that the coolant is directed from the branch to the openings.
  • the openings in the form of side outlets are suitable for draining the coolant in tools such as drills or milling cutters that have no inner channel.
  • the piezo drive is still cooled by the coolant volume flow.
  • the relatively higher pressure can also be used for external cooling of the tool.
  • the tool holder has a deflecting element arranged interchangeably on the tool holder for deflecting the coolant emerging from the openings in a direction of the tool received on the tool holder.
  • the tool holder has a stabilizing element circumferentially around the first connecting portion and the second connecting portion for stabilizing a connection of the first portion of the refrigerant piping portion and the second portion of the refrigerant piping portion.
  • This has the advantage that the area of the tool holder in which the sections of the coolant line section are connected becomes more stable.
  • the coolant is air or water or an emulsion.
  • Air and water have the advantage that they can be provided cheaply.
  • An emulsion has the advantage that its lubricating effect is high.
  • a machine tool according to the invention has the tool holder according to the invention, wherein the tool received in the tool holder and arranged in the housing of the tool holder parts of the tool holder along an axial direction of the tool holder during a workpiece processing by the coolant in the coolant line section can be cooled.
  • Fig. 1 shows an embodiment of a tool holder according to the invention as a sectional view.
  • Figs. 2A / B show a further embodiment of an inventive
  • Fig. 1 shows an embodiment of a tool holder 100 according to the invention as a sectional view.
  • the tool holder 100 is formed as a longitudinal member having a first end portion 30 and a second end portion 50 facing the first end portion 30.
  • a tool 200 (not shown) may be received.
  • a mounting portion 40 is formed, by means of which the tool holder 100 can be replaceably attached to a machine tool 300.
  • the tool holder 100 has a housing 10 in which a vibratory system comprising an ultrasonic transducer 70 and a transmission element 20 is disposed.
  • the ultrasonic transducer 70 has stacked disc-shaped piezo elements that are excited by a generator (not shown) to a mechanical ultrasonic vibration. This vibration is transmitted by the mechanical coupling of the ultrasonic transducer 70 with the transmission element 20 to the transmission element 20 and from there to the tool 200.
  • the tool holder 100 has a coolant conduit section 60 through which coolant from an opening of the coolant conduit section 60 in the region of the attachment section 40 through the tool holder 100 toward an opening of the coolant conduit section 60 in the region of the transfer section 20 is passed and exits under pressure from this.
  • a first section 61 of the coolant line section 60 is formed as a bore, to which a first connection section 63 in the form of a hollow post adjoins.
  • the hollow pin 63 is circumferentially surrounded by a second connecting portion 64, which may be formed as a portion of a pipe.
  • the second connecting portion 64 has for this purpose an inner diameter which is only slightly larger than the outer diameter of the hollow pin 63.
  • the opening of the hollow pin 63 is positioned within the second connecting portion 64 away from an opening of the connecting portion 64.
  • the cavity in the second connection section 64 is part of a second section 62 of the coolant line section 60, which adjoins the first section 61 of the coolant line section 60.
  • the cavity in the second connection portion 64 may be continued through a channel in a transition section 66 of the coolant line section 60.
  • the channel may be continued through a length of pipe 67 which is connected to a device (not shown) which introduces coolant into the tool holder 100.
  • the channel in the transition section 66 and the pipe section 67 are also part of the second section 62 of the coolant line section 60. In this way, coolant can be conveyed from the second end section 50 of the tool holder 100 through the entire length of the coolant line section 60 to the tool 200 at the first End section 30 of the tool holder 100 are passed.
  • the parts of the tool holder 100 that form the first section 61 of the coolant line section 60 ie, the transmission section 20 and the hollow pin 63, oscillate.
  • the parts of the tool holder 100 forming the second section 62 of the coolant conduit section 60 vibrate Not.
  • the hollow pin 63 performs a vibration in the second (non-oscillating) connecting portion 64.
  • the hollow pin 63 and the second connecting portion 64 do not come into direct mechanical contact, the pin wall is ground and in the annular space between the hollow pin 63 and the second connecting element 64, a sealing element 65th pressed in the form of an O-ring to the hollow pin 63.
  • the sealing ring 65 thus ensures a small minimum distance between the hollow pin 63 and the second connecting portion 64 and seals the connection between the first section 61 and the second section 62 of the coolant line section 60 against leakage of coolant from the coolant line section 60.
  • the coolant flows directly into the bore of the transfer section 20.
  • the entire diameter of the bore of, for example, 2.5 mm, ie a cross-sectional area of, for example, 4.9 mm 2 , be used for passing the coolant.
  • the wall formed by the transfer element 20 around the bore is relatively thick (thicker than the bore diameter).
  • a stabilizing element 80 is arranged in the housing 10 around the second connecting section 64 and around a part of the transition section 66.
  • voids within the housing 10 that are not part of the coolant line section 60 are largely avoided.
  • the coolant can be passed through the tool holder 100 at a high pressure of up to 80 bar.
  • the ultrasonic transducer 70 is arranged as a ring element around the bore in the transmission section 20, without there being a cavity between the bore and the ultrasonic transducer 70 in the radial direction.
  • the coolant flowing through the transfer section 20 thus provides cooling of the wall around the bore and the direct mechanical contact of the transfer section 20 with the ultrasonic transducer 70, thus also for cooling the ultrasonic transducer 70.
  • Figs. 2A and 2B show another embodiment of a tool holder according to the invention 100 as a sectional view from two different perspectives, which differs from the embodiment in Fig.
  • the bore in the transfer section 20 has a branch 68, so that the coolant is passed to a plurality of openings 69 located in the transfer section 20 adjacent to the tool 200.
  • the coolant can not, as shown in FIG. 1, be passed through a single opening of the coolant line section 60 and further through the tool 200 to the tool tip.
  • the coolant is supplied to the openings 69 directed.
  • the coolant with the aid of a deflecting element 21 is guided on the tool holder 100 to the tool 200 around to the tool tip.
  • the deflecting element 21 can be exchangeably attached to the tool holder 100. In this way, on the one hand the ultrasonic transducer 70 is additionally cooled on the side facing the tool 200 and on the other hand also the outside of the tool is cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

La présente invention concerne un porte-outil (100) destiné à recevoir un outil (200), ce porte-outil (100) comprenant un corps (10), un élément de transmission (20) agencé mobile dans le corps (10) pour transmettre un mouvement à l'outil (200) placé à une première extrémité (30) du porte-outil (100), une section de fixation (40) située au niveau d'une deuxième extrémité (50) du porte-outil (100) opposée à la première extrémité (30) du porte-outil (100) pour fixer le porte-outil (100) à une machine-outil (300), ainsi qu'une section de conduite de réfrigérant (60) destinée à conduire un réfrigérant de la deuxième extrémité (50) du porte-outil (100) à la première extrémité (30) du porte-outil (100). Selon l'invention, la section de conduite de réfrigérant (60) présente une première partie (61) s'étendant à travers l'élément de transmission (20), cette première partie (61) se présentant au moins en partie sous la forme d'un alésage ménagé dans l'élément de transmission (20).
EP16753335.5A 2015-08-31 2016-08-11 Porte-outil Withdrawn EP3344412A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015216596.5A DE102015216596C5 (de) 2015-08-31 2015-08-31 Werkzeughalter
PCT/EP2016/069131 WO2017036757A1 (fr) 2015-08-31 2016-08-11 Porte-outil

Publications (1)

Publication Number Publication Date
EP3344412A1 true EP3344412A1 (fr) 2018-07-11

Family

ID=56694136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16753335.5A Withdrawn EP3344412A1 (fr) 2015-08-31 2016-08-11 Porte-outil

Country Status (8)

Country Link
US (1) US20180264611A1 (fr)
EP (1) EP3344412A1 (fr)
JP (1) JP2018529531A (fr)
KR (1) KR20180096569A (fr)
CN (1) CN108602136A (fr)
DE (1) DE102015216596C5 (fr)
RU (1) RU2701252C1 (fr)
WO (1) WO2017036757A1 (fr)

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KR102182950B1 (ko) * 2017-02-10 2020-11-25 유겐가이샤 유웨이브 초음파 진동 부여구 및 초음파 가공 장치
TWI666087B (zh) * 2017-03-29 2019-07-21 國立中興大學 一種切削刀把
EP3756808B1 (fr) * 2018-02-24 2022-11-02 Dalian University Of Technology Support de coupe par ultrasons pour âme en nid d'abeilles
CN109676158A (zh) * 2019-01-03 2019-04-26 东莞市皓晟实业有限公司 一种自动更换刀具的超声波主轴
CN111906490B (zh) * 2020-07-29 2022-09-16 北京圣龙博睿科技有限公司 一种无限回转水冷夹紧机构
TWI740724B (zh) * 2020-11-20 2021-09-21 財團法人工業技術研究院 超音波刀把及超音波刀把冷卻與切屑導流系統
KR102705274B1 (ko) * 2023-02-06 2024-09-11 주식회사 알피에스 초음파 에어베어링 스핀들 장치
CN119566356A (zh) * 2024-12-02 2025-03-07 沈阳航空航天大学 一种风冷散热式超声刀柄结构

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EP2666567A1 (fr) * 2008-08-29 2013-11-27 Franz Haimer Maschinenbau KG Dispositif porte-outil
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Also Published As

Publication number Publication date
RU2701252C1 (ru) 2019-09-25
DE102015216596A1 (de) 2017-03-02
DE102015216596B4 (de) 2017-03-30
US20180264611A1 (en) 2018-09-20
KR20180096569A (ko) 2018-08-29
WO2017036757A1 (fr) 2017-03-09
JP2018529531A (ja) 2018-10-11
DE102015216596C5 (de) 2026-01-15
CN108602136A (zh) 2018-09-28

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