EP1542820A1 - Machine pour le degrossissage et le finissage d'elements fonctionnels de vilebrequins ou d'arbres a cames - Google Patents

Machine pour le degrossissage et le finissage d'elements fonctionnels de vilebrequins ou d'arbres a cames

Info

Publication number
EP1542820A1
EP1542820A1 EP03807774A EP03807774A EP1542820A1 EP 1542820 A1 EP1542820 A1 EP 1542820A1 EP 03807774 A EP03807774 A EP 03807774A EP 03807774 A EP03807774 A EP 03807774A EP 1542820 A1 EP1542820 A1 EP 1542820A1
Authority
EP
European Patent Office
Prior art keywords
crankshaft
machine
milling
tool
rotation
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Withdrawn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
EP03807774A
Other languages
German (de)
English (en)
Inventor
Alfred Heimann
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.)
Niles Simmons Industrieanlagen GmbH
Original Assignee
Niles Simmons Industrieanlagen 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 Niles Simmons Industrieanlagen GmbH filed Critical Niles Simmons Industrieanlagen GmbH
Publication of EP1542820A1 publication Critical patent/EP1542820A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/18—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning crankshafts, eccentrics, or cams, e.g. crankpin lathes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/06—Milling crankshafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5109—Lathe
    • Y10T29/5114—Lathe and tool

Definitions

  • the invention relates to a machine for roughing and finishing functional elements of crankshafts or camshafts by turning and / or milling with two in alignment with the axis of rotation of the crankshaft or camshaft being machined and at a mutual distance from one another according to the length of the crankshaft or camshaft headstocks that can be driven at different speeds, each with a chuck and a center point integrated into each chuck.
  • the "functional elements" are, for example, the main and connecting rod bearing journals of crankshafts, the bearings and cams of camshafts and other parts of crankshafts or camshafts which are operatively connected to other components of an internal combustion engine.
  • a machine of the type mentioned above, which is used for machining crankshafts, is known for example from DE 197 49 939 AI.
  • the known machine has
  • a headstock that can be driven at different speeds, each with a chuck for the crankshaft
  • a support that can be moved in the X and Z directions with a rotating drivable milling tool
  • Direct spindle drives for tools and their advantages, particularly with regard to high dynamics and accuracy, are generally known.
  • the relevant specialist is also familiar with using such direct drives for the rotational movement of workpieces.
  • DE 101 30 433 AI a direct drive for a rotating on a lathe. Removable workpiece to be machined.
  • a generic machining center for crankshafts is known from De 43 29 610 C2.
  • the well-known 'machining center provides, for example on a machine bed, among others, at each end of a driven face plate for gripping and rotating a crankshaft,
  • a universal milling unit that can be moved in the X and Z directions and
  • a machining head that can be moved in the X and Z directions.
  • crankshafts at the hub bearings, main bearings, cheek side surfaces, end journals and end flanges should be machined on a single machine with little effort and in the shortest machining time.
  • the central, rotationally symmetrical surfaces, for example of the main bearing points should be by workpiece-based processes, that means being processed at high speeds.
  • machining eccentric, rotationally symmetrical surfaces, for example the hub bearings machining is provided by tool-based methods, that is to say at lower speeds.
  • the desired cutting speed is achieved by the rotational speed of the crankshaft.
  • longitudinal turning, facing, broaching, turning and turning-turning are mentioned.
  • the cutting speed by the movement, in particular rotation of the tool is achieved.
  • the Orthogonalfräsen, external milling and external cylindrical grinding According to these specifications does the known combination machine two workpiece spindles before that face each other at a mutual distance corresponding to the length While the one spindle can drive the workpiece at high speed, the second spindle is designed to drive the workpiece at a lower speed by a factor of 10.
  • the main bearing points are at high speeds the crankshaft is turned or cleared, the crankshaft's bearing positions are milled or ground at low speeds, and a compensating chuck is also used in the known combination machine , which has compensating jaws.
  • crankshafts are said to.
  • crank pins of crankshafts and the cams of camshafts should be able to be produced in such a way that they perform the required lifting movements during operation with high accuracy.
  • the stroke accuracy is the prerequisite for the use of tangent radii on connecting rod bearings and, of course, for the reduction of the material to be removed from the crankshaft bearings by grinding.
  • the headstocks are designed to be directly drivable and, with mutual spacing in the Z direction, two supports that can be moved in the X and Z directions, each with a rotationally drivable one Milling tool and two supports that can be moved in the X and Z directions, each with at least one Turning tool are provided, the milling and turning tools are diametrically opposite each other with respect to the common axis of rotation of the headstock.
  • crankshaft or camshaft to be machined such as the machining of the main and connecting rod bearing journals of a crankshaft, is carried out according to the invention in the order of roughing and finishing in a first machine.
  • the centering, machining of the ends and the introduction of oil bores, deep rolling, (laser hardening), grinding, superfinishing of the functional elements of the shaft being machined can then be carried out in other machines.
  • the first machine provided according to the invention corresponds to the idea of a short process chain, in which, when such a machine comes to a standstill or fails, the entire production line is not stopped, but rather the capacity of the production line is reduced for the downtime.
  • a crankshaft or a camshaft can be machined so precisely that the residual error in the main bearing alignment for the subsequent straightening rolling is very small.
  • the support which can be moved in the X and Z directions, can also be equipped with a broaching or grinding tool.
  • a plurality of turning tools can be arranged on the circumference of a turret disk.
  • the workpiece spindles should be provided with direct drives. These are drives ' that can drive the workpiece spindle without the interposition of further gears.
  • Such a direct drive is characterized by a particularly high level of accuracy because errors which can creep into the work result due to the gear play are eliminated.
  • a direct drive also has the advantage that it covers a wide speed range and can be controlled very precisely over a large speed range.
  • a tailstock with a quill is provided on the opposite side, in which a center point of the bearing, which is mounted in the axis of rotation of the shaft being machined, can be moved in the axial direction.
  • the direct drives for the workpiece spindles are provided in a speed range between 5 min “1 to 1500 min " 1 , but preferably at 1000 min "1 .
  • the machine has two double supports.
  • Each double support consists of a slide that can be moved in the Z direction, which can move parallel to the axis of the workpiece spindle, and an X slide, which bridges the shaft to be machined and has a milling structure on one side of the shaft with a milling disk and on the other Side of a turning setup with a turning tool.
  • the rotary assembly can consist of a turret disk with at least one turning tool, or can have a continuous drive with a broaching tool for turning broaching.
  • the double support is opposed by a second identical double support at a distance in the Z direction, similar to the case with the chucks of the workpiece spindles.
  • two bearing points for the main or pin bearings can be machined simultaneously from both ends of the crankshaft or camshaft to be machined.
  • two tool supports are again provided, on which turning tools or broaching tools are attached. The latter are assumed to be able to make a limited amount of rotation about their spindle axis.
  • Rotary tools are provided with turret disks which are equipped with different tools which come into engagement one after the other. This arrangement also makes it possible to simultaneously process the corresponding main bearing points of the crankshaft or camshaft from both ends.
  • crank pins when machining a crankshaft, the main bearings one and five and the main bearings two and four are machined simultaneously, while for reasons of space the main bearing three is machined at the end.
  • the processing sequence for the crank pins is similar, first the two crank pins one and four and then the two crank pins two and three are machined simultaneously.
  • Fig. 1 is a plan view of the machine
  • Fig. 2 shows a cross section through the machine along the
  • two headstocks 3 and 4 are arranged opposite one another in the direction of the longitudinal center axis 2.
  • the mutual distance between the two headstocks 3 and 4 corresponds to the length of a crankshaft 5 which is clamped between the two headstocks 3 and 4.
  • crankshaft 5 is clamped in by jaw chucks 6 and 7, one of which engages 6 on the flange 8 of the crankshaft 5 and the other 7 on the latter Pin 9.
  • the crankshaft 5 is still centered at its two ends 8 and 9 in grain tips 10 and 11.
  • the center points 10 and 11 are aligned with the longitudinal center axis 2 of the machine 1 and are at the same time concentric with the main axis of rotation of the crankshaft 5.
  • a tool support 12 is also provided, via which a milling tool 13 can be rotatably driven.
  • the tool support 12 can be moved in the two directions X and Z with respect to the machine bed 1.
  • a suitable drive 14, as is known per se, is used for this purpose.
  • a second tool support 15 is provided opposite the longitudinal center axis 2 and at approximately the same distance therefrom.
  • the tool support 15 carries, for example, a turret disk 16, which is equipped with different turning tools 17, for example turning tools or broaches.
  • the tool supports 12 and 15 can be moved by a single drive 1 ′′ 4 in the X direction and possibly also in the Z direction and thus form a double support.
  • the milling tool 13 is rotatably supported in the tool support 12 about the axis of rotation 18 and the turret disk 16 in the tool support 15 about the axis of rotation 19.
  • two further tool supports 20 and 21 are then provided on the machine bed 1, which also represent a double support due to their common drive 14.
  • Support is 20 also equipped with a milling disk 13 which can be driven about the support axis 22.
  • the support 21 is in turn equipped with a turret disk 16 which can be pivoted about the axis of rotation 23. With the help of the two additional tool supports 20 and 21, the crankshaft 5 can be machined from both ends 8 and 9 simultaneously.
  • the turning tools 17 of the two turret disks 16 are simultaneously engaged on the first and fifth, then on the second and fourth and finally one of the two turret drives 16 with their turning tool 17 on the third main bearing of the crankshaft 5, the crankshaft 5 rotating at high speeds.
  • the two milling disks 13 work with their cutting edges first the two crank pins one and four and then the two crank pins two and three simultaneously, while the crankshaft 5 rotates at low speeds. In the latter
  • Machining state are the two milling disks 13 in the axial direction, i.e. as close as possible to each other in the Z direction.
  • the two jaw chuck 6 and 7 each equalizing jaws 24 which ensure 'that 5 unilateral forces are not transmitted to the crank shaft 5 during the tensioning of the crankshaft.
  • Jaw chucks 6 and 7 with these properties are known as compensating chucks. After each machining operation, ie after turning or milling, the clamping jaws 24 of the compensating jaw chucks 6 and / or 7 are loosened briefly. As a result, the stresses introduced into the crankshaft 5 by chip removal can be briefly reduced again. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Turning (AREA)

Abstract

L'invention concerne une machine destinée au dégrossissage et au finissage d'éléments fonctionnels de vilebrequins ou d'arbres à cames par tournage et/ou fraisage. Cette machine est équipée de deux poupées fixes qui sont disposées dans l'alignement de l'axe de rotation du vilebrequin ou de l'arbre à cames en cours d'usinage, à une certaine distance l'une de l'autre en fonction de la longueur du vilebrequin ou de l'arbre à cames, et qui peuvent être entraînées avec des vitesses de rotation différentes. A chaque poupée fixe est associé un mandrin dans lequel est intégrée une pointe. Selon l'invention, les poupées fixes (3 et 4) sont à entraînement direct. Par ailleurs, la machine comprend, à distance l'un de l'autre respectivement dans la direction Z, deux supports (12, 20) pouvant être déplacés dans les directions X et Z et présentant chacun un outil de fraisage (13) pouvant être entraîné en rotation, ainsi que deux supports (15, 21) pouvant être déplacés dans les directions X et Z et présentant chacun au moins un outil de tournage (17), les outils de fraisage et les outils de tournage étant diamétralement opposés respectivement par rapport à l'axe de rotation commun des poupées fixes.
EP03807774A 2002-09-27 2003-08-06 Machine pour le degrossissage et le finissage d'elements fonctionnels de vilebrequins ou d'arbres a cames Withdrawn EP1542820A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10245071 2002-09-27
DE10245071A DE10245071B4 (de) 2002-09-27 2002-09-27 Maschine zum Schruppen und Schlichten der Lagerzapfen von Kurbelwellen
PCT/EP2003/008671 WO2004033136A1 (fr) 2002-09-27 2003-08-06 Machine pour le degrossissage et le finissage d'elements fonctionnels de vilebrequins ou d'arbres a cames

Publications (1)

Publication Number Publication Date
EP1542820A1 true EP1542820A1 (fr) 2005-06-22

Family

ID=31984139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03807774A Withdrawn EP1542820A1 (fr) 2002-09-27 2003-08-06 Machine pour le degrossissage et le finissage d'elements fonctionnels de vilebrequins ou d'arbres a cames

Country Status (5)

Country Link
US (1) US20060143888A1 (fr)
EP (1) EP1542820A1 (fr)
AU (1) AU2003250213A1 (fr)
DE (1) DE10245071B4 (fr)
WO (1) WO2004033136A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006024715B4 (de) 2006-05-26 2008-07-24 Niles-Simmons Industrieanlagen Gmbh Verfahren zum Bearbeiten der Lagersitze der Haupt- und Hublager von Kurbelwellen sowie Werkzeugmaschine zur Durchführung des Verfahrens
DE102011113801A1 (de) * 2011-09-16 2013-03-21 Hegenscheidt-Mfd Gmbh & Co. Kg Verfahren zum Verbessern der Güte der Oberflächen von Kurbelwellen
DE102011113758B4 (de) * 2011-09-18 2020-12-31 Mag Ias Gmbh Verfahren und Vorrichtung zur Fertigbearbeitung von Werkstücken
DE102012004902B4 (de) 2012-03-09 2014-03-20 Emag Holding Gmbh Verfahren und Vorrichtung zur spanabhebenden Bearbeitung von Werkstücken
DE102014204807B4 (de) * 2014-03-14 2016-12-15 Erwin Junker Grinding Technology A.S. Verfahren und Vorrichtung zum Schleifen von Großkurbelwellen
TWI729912B (zh) * 2020-08-18 2021-06-01 煒森機械有限公司 鋼材表面粗化之切削機構

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5175914A (en) * 1987-04-28 1993-01-05 Yamazaki Mazak Corporation Machine tool having dual spindles and tool rests
WO1989010223A1 (fr) * 1988-04-19 1989-11-02 Nakamura Tome Precision Ind. Co., Ltd. Tour a commande numerique par calculateur a deux arbres principaux opposes
DE4329610C2 (de) * 1993-09-02 1996-08-29 Doerries Scharmann Gmbh Bearbeitungszentrum für Kurbelwellen
US5765456A (en) * 1993-09-11 1998-06-16 Index-Werke Gmbh & Co. Hahn & Tessky Process for the machining of a workpiece on a CNC automatic lathe as well as a CNC automatic lathe
DE19749939C2 (de) * 1997-11-11 2003-10-23 Boehringer Werkzeugmaschinen Verfahren zur Bearbeitung von Werkstücken
DE60037400T2 (de) * 1999-10-28 2008-11-13 Nakamura Tome Precision Industry Co. Ltd. Kombinierte drehmaschine mit nc steuerung
US6640678B2 (en) * 2000-01-18 2003-11-04 Nakamura-Tome Precision Industry Co., Ltd. Lathe with two-opposed spindles
DE10027945A1 (de) * 2000-06-08 2002-01-10 Widia Gmbh Scheibenfräser
DE20012080U1 (de) * 2000-07-12 2000-12-07 Röhm GmbH, 89567 Sontheim Komplett-Spannsystem an einer Drehmaschine
DE10035718A1 (de) * 2000-07-21 2002-02-07 Boehringer Werkzeugmaschinen Werkzeugmaschine
DE10052443A1 (de) * 2000-10-23 2002-05-08 Boehringer Werkzeugmaschinen Kombimaschine
DE20208792U1 (de) * 2002-06-06 2003-07-24 Niles-Simmons Industrieanlagen GmbH, 09117 Chemnitz Dreh-Fräsmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004033136A1 *

Also Published As

Publication number Publication date
AU2003250213A1 (en) 2004-05-04
DE10245071B4 (de) 2006-08-24
US20060143888A1 (en) 2006-07-06
WO2004033136A1 (fr) 2004-04-22
DE10245071A1 (de) 2004-04-08

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