EP3271110A1 - Système à tête d'alésage de précision - Google Patents

Système à tête d'alésage de précision

Info

Publication number
EP3271110A1
EP3271110A1 EP16712773.7A EP16712773A EP3271110A1 EP 3271110 A1 EP3271110 A1 EP 3271110A1 EP 16712773 A EP16712773 A EP 16712773A EP 3271110 A1 EP3271110 A1 EP 3271110A1
Authority
EP
European Patent Office
Prior art keywords
bearing
aerostatic
tool
feinbohrkopfsystem
air
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Withdrawn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
EP16712773.7A
Other languages
German (de)
English (en)
Inventor
Sascha Jaumann
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.)
Mauser Werke Oberndorf Maschinenbau GmbH
Original Assignee
Mauser Werke Oberndorf Maschinenbau 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 Mauser Werke Oberndorf Maschinenbau GmbH filed Critical Mauser Werke Oberndorf Maschinenbau GmbH
Publication of EP3271110A1 publication Critical patent/EP3271110A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03432—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing
    • B23B29/03446—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing by means of inclined planes
    • 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
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03432—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing
    • B23B29/03457—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing by pivoting the tool carriers or by elastic deformation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B41/04—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring polygonal or other non-circular holes
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • 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

Definitions

  • the invention relates to the mounting of a tool spindle of a fine boring head system according to the preamble of patent claim 1.
  • Hydrostatic oil generates considerable friction in the bearing gap due to the high relative speed in spindle bearings.
  • the tool spindle has a thermal gear, as the storage of the tool spindle heats up.
  • the invention is based on the object to provide a Feinbohrkopfsystem in which the storage of the tool spindle is improved.
  • This object is achieved by a fine boring head system having the features of patent claim 1.
  • the fine boring head system serves for the production or fine machining or superfinishing of recesses of workpieces.
  • the fine boring head system has a tool spindle, via which a tool holder or a tool can be driven in rotation.
  • the tool spindle has an aerostatic bearing with gas.
  • the aerostatic bearing preferably relates to the mounting of a rotating spindle shaft in a stationary spindle housing.
  • the aerostatic bearing can be or have at least one radial bearing.
  • the aerostatic bearing can be or have at least one thrust bearing.
  • the aerostatic bearing can also be designed such that two combination bearings are provided, which each combine a radial bearing and a thrust bearing.
  • at least one aerostatic conical bearing can be provided. This has (per camp) two frustoconical air bearing surfaces.
  • an aerostatic spherical bearing This has (per bearing) a concave curved and a convex curved air bearing surface.
  • a boring tool with a tilting head-preferably a membrane tilting head- is provided, via which the tool holder or the tool can also be set during machining to form a rotation axis.
  • a tilting head preferably a membrane tilting head-
  • the tool holder or the tool can also be set during machining to form a rotation axis.
  • a trumpet-shaped recess are made.
  • the tilting head can use the gas supply - in particular compressed air supply - the storage according to the invention and have an aerostatic storage.
  • a control can be realized from the rear, having a pull rod or push rod and a Linearpositionierica.
  • the linear positioning unit preferably has an electromechanical or hydraulic drive unit and an electronic control unit.
  • the linear positioning unit is accommodated in a spindle shaft.
  • the positioning signals by means of a wireless
  • a drive-out tool is provided, by way of which a radial distance of the tool holder or of the tool to an axis of rotation can also be adjusted during machining.
  • the drive tool has at least one piezoelectric actuator-preferably with a radial direction of action-its distance to the axis of rotation can be repeatedly adjusted via this during a rotation of the tool holder, whereby non-circular recesses can be produced.
  • a rotary encoder for the rotational position of the tool holder is provided.
  • the speed of the inventively mounted tool spindle can be controlled.
  • the adjustment of the radial distance of the tool holder to the rotation axis in the course of a revolution can be controlled.
  • the fine boring head system has an electric motor, which is accommodated together with at least one section of a spindle shaft in a spindle housing, whereby the tool spindle is further developed into a motor spindle.
  • a particularly preferred application of the aerostatically mounted tool spindle with a drive tool is the machining of a connecting rod eye.
  • the connecting rod eye can be preprocessed, and in a second movement (drive out) against the first movement, the connecting rod eye can be reworked.
  • the aerostatic bearing on air bearing nozzles which are distributed on the outer circumference of a spindle shaft.
  • the air bearing nozzles may be micro-nozzles.
  • the air bearing nozzles are preferably arranged in the radial bearing in one or more air bearing nozzle rings or in the axial bearing or in the conical bearing in one or more air bearing nozzle rings.
  • the air bearing nozzle ring or rings are preferably centrally located between an inner edge and an outer edge of an air bearing surface.
  • the air bearing nozzles may be formed in or inserted into an air bearing cartridge which is inserted into the spindle housing.
  • the air bearing cartridge is formed like a bush and includes the spindle shaft.
  • a larger and a smaller air bearing cartridge are provided, wherein on the larger air bearing cartridge two radial bearings are formed, and wherein the thrust bearing is formed on the two air bearing cartridges.
  • annular grooves For air supply and air distribution at the periphery of the air storage cartridges one or more annular grooves is provided in these.
  • the annular groove may be arranged on the front side or on the outer circumference of the air bearing cartridge and connected via bores with the air bearing nozzles.
  • an air bearing surface is formed of porous air bearing material, so that a large-area uniform support takes place.
  • FIG. 1 shows, in a schematic longitudinal section, the fine boring head system according to the invention according to a first exemplary embodiment
  • FIG. 2 shows in a perspective longitudinal section the fine boring head system according to the invention in accordance with a second exemplary embodiment
  • FIG. 3 shows a schematic longitudinal section of the fine boring head system according to the invention in accordance with a third exemplary embodiment
  • FIG. 4 shows, in a schematic longitudinal section, the fine boring head system according to the invention according to a fourth exemplary embodiment
  • FIG. 5 shows in a longitudinal section an aerostatic bearing according to the invention which is suitable for the embodiments according to FIGS. 1 to 4, FIG.
  • FIG. 6 is a schematic longitudinal section through the fine boring head system according to the invention in accordance with a fifth exemplary embodiment
  • 7 shows a view of a stationary part of an axial bearing according to FIG. 5 or of a conical bearing according to FIG. 6 with a diagram showing the pressure variation as a function of the radius
  • FIG. 8 shows a view of a stationary part of a thrust bearing which is suitable for the exemplary embodiments according to FIGS. 1 to 4 or of a stationary part of a conical bearing according to FIG. 6 with a diagram showing the pressure variation as a function of the radius.
  • FIG. 9 shows a view of a stationary part of a thrust bearing which is suitable for the exemplary embodiments according to FIGS. 1 to 4 or of a stationary part of a conical bearing according to FIG. 6 with a diagram which shows the pressure variation as a function of the radius.
  • FIG. 1 1 shows a schematic longitudinal section of the fine boring head system according to the invention in accordance with a sixth exemplary embodiment.
  • FIG. 1 shows a schematic longitudinal section of the first embodiment of the fine boring head system according to the invention.
  • a tool blade 1 is received in a tool holder 3a and fixed and can be rotated by means of a tool spindle 1 a about a rotation axis 2a.
  • the tool spindle 1a has a spindle shaft 3, which is rotatably received in a spindle housing 8.
  • two aerostatic radial bearings 9, 10 are provided, which are axially spaced apart from one another along the axis of rotation 2a.
  • the spindle shaft 3 has a radial circumferential projection or a radially encircling shoulder, on whose two axially spaced-apart sides in each case an aerostatic thrust bearing 1 1, 12 is formed.
  • the front aerostatic thrust bearing 1 1 and the rear aerostatic thrust bearing 12 is each formed by two circular disk-shaped bearing surfaces, one bearing surface of which is formed on the radial projection of the spindle shaft 3 and the other bearing surface on the spindle housing 8.
  • the two bearing surfaces of each thrust bearing 10, 12 have a minimum axial distance from each other.
  • the spindle shaft 3 is driven.
  • the electric motor 13, 14 is integrated in the tool spindle, so that an aero-static mounted motor spindle 1 a is formed.
  • the tool holder 3a is mounted on the spindle shaft 3 at the end face via a tilting head 2 with a flexible membrane and can be angled somewhat (in accordance with the dashed lines) against the axis of rotation 2a.
  • the tool cutting edge 1 is set to an enlarged radius.
  • This pivotal movement between the tool holder 3a and the spindle shaft 3 is made possible by the radially extending diaphragm of the tilting head 2, which act on the tool holder 3a with a return force.
  • an adjustment kinematics is accommodated in the interior of the spindle shaft 3.
  • This has a tool receiving side driver 4 and a link 5, which can be moved via a push rod 6 in the axial direction along the axis of rotation 2a.
  • a Planzug 7 is provided. Since the slide 5 and the push rod 6 rotate with the spindle shaft 3, the face pull 7 has a roller bearing, on the rotating inner ring, an end portion of the push rod 6 is fixed.
  • a dimensional standard of a rotary encoder 15 is arranged on the spindle shaft 3, whose rotation angle or number of revolutions can be received by a sensor 16 of the rotary encoder 15.
  • the rotational speed of the spindle shaft 3 can be be regulated.
  • the adjustment kinematics of the tilting head 2 can furthermore be regulated.
  • FIG. 2 shows a second embodiment of the fine boring head system according to the invention.
  • the tool spindle 1 a has the not shown in detail in FIG. 1 according to the invention aerostatic bearing its spindle shaft 3.
  • a tilting head 2 is arranged with a flexible membrane over which the tool holder 3a can be tilted.
  • FIG. 3 shows another embodiment of the aerostatically mounted tool spindle 1 a with integrated Planzug 7.
  • the slide 5 of the adjustment kinematics is moved by a drive unit 17 which is integrated in the spindle shaft 3, and which is preferably driven electromechanically.
  • a hydraulically driven drive unit is conceivable.
  • a control unit 18 is likewise located in the spindle shaft 3, which receives positioning signals from a machine control (not shown) via a slip ring power transmission 19 and converts the drive unit 17 into energization or commutation of the electric motor.
  • the positioning signals from the machine control can also be received by radio (e.g., telemetry or Bluetooth or RFID) and converted into energization or commutation.
  • the slip ring power transmission 19 can be equipped either for the energization of the control unit 18 or with data tracks for data transmission.
  • Figure 4 shows another embodiment of the aerostatically mounted tool spindle 1 a with a generalized adjustment tool unit 20, the one Has adjusting kinematics and is integrated in the spindle shaft 3, for example, a piezo-adjusting unit.
  • FIG. 5 shows the structure of the aerostatic bearings 9, 10, 1 1, 12, as they can be provided in the preceding embodiments.
  • an air supply bore 21 is provided parallel to the rotation axis 2a.
  • Two bearing cartridges 8 'and 8 are also inserted into the spindle housing 8.
  • Four annular grooves 22 are provided on the outer circumference of the larger bearing cartridge 8', while an annular groove 22 is provided on the front side of the smaller bearing cartridge 8".
  • the annular grooves 22 are connected to the air supply bore 21 and serve to distribute the air around the circumference of the bearing cartridges 8 'and 8 ".
  • the annular groove 22 of the bearing cartridge 8" is connected to the outer circumference of the bearing cartridge 8 "via at least one radial bore are introduced into the bearing cartridges 8 'and 8 "holes 22a, which open into respective air bearing nozzles 30.
  • the two air bearing nozzle rings 9 ', 10' of the two radial bearings and an air bearing nozzle ring 1 1 'of the front thrust bearing 1 1 are formed on the larger air bearing cartridge 8, while on the smaller air bearing cartridge 8 "an air bearing nozzle ring 12' of the rear thrust bearing 12 is formed.
  • the air bearing nozzles 30 are formed by lasers in a ridge, which is arranged between the respective bore bottom and the air bearing surface of the aerostatic bearing 9, 10, 1 1, 12.
  • pre-drilled air bearing nozzle inserts can also be inserted (eg glued in) if the holes are completely continuous.
  • the bores 22a and thus the air bearing nozzles 30 are arranged radially, so that an air bearing nozzle ring 9 ', 10', 9 "and 10" is formed.
  • the thrust bearings 1 1, 12 have axial bores 22 a, so that an air bearing nozzle ring 1 1 ', 12' is formed.
  • a flange 23 is designed for assembly, otherwise the storage cartridge 8 'can not be used. More specifically, the flange 23 is fixed to an end face of the spindle shaft 3 via screws after the larger air bearing cartridge 8 'has been pushed between the spindle shaft 3 and the spindle housing 8.
  • Figure 6 shows a different from the previous embodiments aerostatic bearing with only a front conical bearing 24 and a rear conical bearing 25.
  • the bearings 24, 25 also be arcuate, then there are two spherical bearings. These types combine radial and thrust bearings in a bearing and in an air bearing surface.
  • FIGS. 7 to 10 show concrete embodiments of a stationary part of the aerostatic thrust bearing 11 or 12 or of the conical bearing 24, 25 with an annular distribution of the air in plan view along the axis of rotation 2a.
  • the axial bearings 11 and 12 are each designed as a single-row micro-nozzle air bearing 26. At one diameter, the air-bearing nozzles 30 are distributed at the same radius and uniformly around the circumference, 5. The radial position of the air bearing nozzles 30 or of the air bearing nozzle ring 11 'or 12' is located in each case in the center of an annular air bearing surface of the bearing cartridge 8 'or 8 ". ,
  • FIG. 8 shows a stationary part, eg a storage cartridge of a double-row micro-nozzle air bearing 27. It has two concentric air bearing nozzle rings.
  • Figure 9 shows a resting part, e.g. a storage cartridge of a porous air bearing 28, in which the air supply takes place surface by porous air bearing material 31.
  • the air bearing material 31 forms the entire annular air bearing surface of the stationary part.
  • Figure 10 shows a resting part, e.g. It has fewer air bearing nozzles 30 than the example of Figure 7.
  • the air bearing surface circular arc distribution channels 32 are provided which extend from the air bearing nozzles 30 in the circumferential direction. The result is a lower support share than in the examples according to FIGS. 8 and 9, but the axial bearing is easy to manufacture.
  • Figure 1 1 shows a tool spindle 1 a with aerostatic bearing according to Figures 1 to 5 or 7 to 10. It is an adjustment tool unit 33 with interface 34 is provided. This interface 34 allows an exchange of the adjusting tool head, whereby also by a tool changer, the tool spindle 1 a can be used for different processing with different heads and then subsequently with an adjusting tool head.
  • an interface (not shown in detail) of the tool holder 3a, e.g. via a Hohlschaftkegel- tool holder replacement (only) of the cutting tool 1 possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

L'invention concerne un système à tête d'alésage de précision permettant la réalisation ou la finition d'évidements de pièces, ledit système à tête d'alésage de précision comprenant une broche porte-outil (1a) par l'intermédiaire de laquelle un porte-outil (3a) ou un outil (1) peut être entraîné en rotation. Ledit système est caractérisé en ce que la broche porte-outil (1a) comprend un palier aérostatique (9, 10, 11, 12) à gaz, de préférence à air.
EP16712773.7A 2015-03-17 2016-03-17 Système à tête d'alésage de précision Withdrawn EP3271110A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015103912 2015-03-17
PCT/EP2016/055901 WO2016146798A1 (fr) 2015-03-17 2016-03-17 Système à tête d'alésage de précision

Publications (1)

Publication Number Publication Date
EP3271110A1 true EP3271110A1 (fr) 2018-01-24

Family

ID=55642423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16712773.7A Withdrawn EP3271110A1 (fr) 2015-03-17 2016-03-17 Système à tête d'alésage de précision

Country Status (3)

Country Link
EP (1) EP3271110A1 (fr)
CN (1) CN107427932A (fr)
WO (1) WO2016146798A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108972104B (zh) * 2018-08-03 2019-09-13 泰州市天宇交通器材有限公司 一种摆动式机床
CN112894275B (zh) * 2021-01-18 2024-02-20 焦作市陆创光电有限责任公司 一种微通道热沉基板超精加工方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4847961A (en) * 1987-12-24 1989-07-18 Ford Motor Company Method and apparatus for stitch-machining deep cavities in metal workpieces
DE3914363A1 (de) * 1988-10-07 1990-10-31 Micro Crystal Ag Hochfrequenzspindel zur werkstueckbearbeitung
JP2506129Y2 (ja) * 1989-10-16 1996-08-07 キタムラ機械株式会社 スピンドルヘッド
DE4401496C3 (de) * 1994-01-20 2001-07-26 Emag Maschfab Gmbh Werkzeugschneiden-Verstelleinrichtung zum Bearbeiten von runden, unrunden und/oder nicht zylinderförmigen Innen- und/oder Außenkonturen
JPH09192904A (ja) * 1996-01-18 1997-07-29 Toshiba Mach Co Ltd 空気軸受式工作機械
DE19960350A1 (de) * 1999-12-14 2001-06-21 Komet Stahlhalter Werkzeuge Werkzeugantrieb für Werkzeugmaschinen
JP2003039281A (ja) * 2002-02-22 2003-02-12 Topcon Corp 加工装置
US7568409B2 (en) * 2005-03-30 2009-08-04 Federal-Mogul World Wide, Inc Hybrid orbiting spindle for shaping non-circular holes
DE102011051609A1 (de) * 2011-07-06 2013-01-10 Mauser-Werke Oberndorf Maschinenbau Gmbh Nachstellsystem

Also Published As

Publication number Publication date
WO2016146798A1 (fr) 2016-09-22
CN107427932A (zh) 2017-12-01

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