WO1999016576A1 - Machine-outil - Google Patents

Machine-outil Download PDF

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Publication number
WO1999016576A1
WO1999016576A1 PCT/EP1998/006073 EP9806073W WO9916576A1 WO 1999016576 A1 WO1999016576 A1 WO 1999016576A1 EP 9806073 W EP9806073 W EP 9806073W WO 9916576 A1 WO9916576 A1 WO 9916576A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle head
machine tool
tool according
lever
construction
Prior art date
Application number
PCT/EP1998/006073
Other languages
German (de)
English (en)
Inventor
Anton Richard Schweizer
Hans-Henning Winkler
Original Assignee
Chiron-Werke Gmbh & 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 Chiron-Werke Gmbh & Co. Kg filed Critical Chiron-Werke Gmbh & Co. Kg
Publication of WO1999016576A1 publication Critical patent/WO1999016576A1/fr

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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/62—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides
    • B23Q1/621—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair
    • 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
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
    • B23Q1/5468—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair
    • B23Q1/5481—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair followed parallelly by a single rotating pair
    • 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
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • 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
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism

Definitions

  • the present invention relates to a machine tool with a machine frame and a spindle head mounted thereon, which can be moved in a horizontal plane to any points for machining a workpiece.
  • Such machine tools are generally known from the prior art.
  • the spindle head is arranged on linear guides arranged at right angles to one another, on which slides driven by ball screws, for example, run. In this way, the spindle head or a tool carried by it can be moved to any desired point for machining a workpiece within the working space of the known machine tool.
  • slide guide for the vertical Z axis is usually behind the spindle head
  • slide guides for the X and Y axes are usually located under the spindle head, i.e. behind, next to or under the workpiece table.
  • Another disadvantage is that, compared to the residual mass of the machine tool, the moving mass is so large that the machine tool "wanders" on the ground during rapid start-up and braking, thus changing its position in the X / Y plane. Among other things, this leads to uncontrolled displacements in the machine tool, which in turn negatively affect the machining accuracy.
  • this object is achieved according to the invention by two spaced apart from each other about a vertical axis with respect to the machine frame pivotally mounted, variable-length constructions that are pivoted to each other about a further vertical axis on the spindle head.
  • the object underlying the invention is completely achieved in this way.
  • the inventor of the present application has created a completely new machine concept in which the spindle head is no longer driven in the X / Y plane by two linear guides arranged orthogonally to one another, but in which e.g. two linear drives are pivotally mounted on the machine frame at one end about two vertical axes, while they are connected at their other end to the spindle head.
  • the spindle head can be carried "hanging", so to speak, directly from the linear drives, but this is not practical with a larger mass of the spindle head. It is therefore e.g. possible to freely hang the spindle head on a frame that serves as strain relief, so that the linear drives are relieved of lateral forces.
  • the spindle head can now move to any point in the X / Y plane of the work area. If, for example, the length of a linear drive, ie the distance between the spindle head and the one vertical axis, is kept constant, the spindle head pivots about this axis when the length of the other linear drive is changed. By changing the length of both linear drives at the same time, any location curves can be traversed in the work area.
  • the "hanging spindle head" has the advantage that in the area of the machine tool where most chips and cooling water are generated, there is no longer any need to arrange guides which are to be protected against contamination.
  • Another advantage is that the masses to be moved are significantly reduced, so that faster drives and thus shorter chip-to-chip times can be achieved.
  • the control of the machine tool which may be more complicated than that of two orthogonal slide guides, is no longer a problem at the current state of microelectronics; all that is required is to program the corresponding locus curves, from which the respective commands for extending the linear drives can then be derived.
  • constructions are mounted on a carrier plate which can be moved vertically on the machine frame.
  • the advantage here is that the entire mass of the carrier plate and constructions only has to be moved in the Z direction, while when moving in the X or Y direction the carrier plate remains fixed and essentially only the spindle head has to be moved.
  • the carrier plate remains fixed and essentially only the spindle head has to be moved.
  • At high axis accelerations in the X and Y directions significantly lower reaction forces are generated than in the prior art, so that the stability of the new machine tool is significantly increased. Reaction forces in the Z direction do not lead to a change in the installation of the machine tool, the reaction forces here only temporarily or heavily load the surface.
  • at least one of the two constructions comprises a lever gear, the first lever arm of which is articulated on the machine frame and the second lever arm is connected to the spindle head.
  • the advantage here is that the spindle head can now be carried via the lever mechanism, so that the aforementioned frame used for strain relief can be dispensed with.
  • the lever gear now holds the spindle head in the Z direction, the joint of the lever gear being pivotable about a further vertical axis.
  • both lever arms are formed by plates, the dimensions of which correspond approximately to those of the spindle head in the vertical direction.
  • the two lever arms formed by high plates of appropriate thickness hold the spindle head in the Z direction with sufficient rigidity regardless of the projection of the lever gear, so that a corresponding working accuracy can also be achieved in the Z direction.
  • both constructions comprise a lever gear.
  • each lever gear mechanism can be changed in its opening angle by its own drive.
  • the advantage here is that the constructions that support and move the spindle head can be constructed very simply.
  • the distance between the vertical axis on the machine frame and the attachment of the lever gear to the spindle head can be e.g. can be changed by a rotary drive in the joint of the lever gear.
  • An advantage of the rotary drive is that it can be of the simplest type, so that the construction effort is low.
  • Another advantage is that such rotary drives can be designed very easily, so that the mass to be moved is reduced again.
  • each lever gear has a linear drive which acts between its two lever arms.
  • the advantage here is that a very fast-acting, inexpensive and lightweight drive such as an electric linear drive or a piston-cylinder unit can be used.
  • this measure further reduces the size of the masses to be moved and, on the other hand, a drive that responds very quickly can be used, so that the chip-to-chip time can be further reduced.
  • one construction is pivotable about the further vertical axis and the other construction is firmly connected to the spindle head.
  • the advantage here is that the angular position of the spindle head in the work area is clearly defined, since the spindle head has a fixed angular position to the second construction.
  • the spindle head is rotatably held in a bearing ring, one construction being firmly connected to the bearing ring and the other construction being firmly connected to the spindle head.
  • Figure 1 is a partial, schematic plan view of the spindle and the constructions that support it on the machine frame in a first embodiment
  • FIG. 2 in a representation like FIG. 1, a second exemplary embodiment of the new machine tool
  • FIG. 3 shows, in a representation like FIG. 1, a third exemplary embodiment of the new machine tool
  • FIG. 4 shows a fourth exemplary embodiment of the new machine tool in a representation like FIG. 1;
  • FIG. 5 is a partial, perspective view of the embodiment of FIG. 4.
  • a machine tool 10 is shown schematically in a plan view, which has a carrier plate 11 guided in a manner to be described on a machine frame, on which a vertically aligned spindle head 12 is mounted via two constructions 14, 15.
  • the constructions 14, 15 are mounted on the carrier plate 11 on vertical axes 16, 17 which are spaced apart from one another and can be pivoted in the direction of arrows 18, 19. Both constructions 14, 15 are variable in length, which is indicated by arrows 20, 21. At their ends remote from the vertical axes 16, 17, the constructions 14, 15 are fastened to the spindle head 12 in such a way that they can be pivoted relative to one another in the direction of an arrow 22 about a further vertical axis 23.
  • the spindle head 12 can now be moved to any point in the X / Y plane, which is spanned by the plane of the drawing in FIG. 1. If, for example, the length of the construction 14 is kept constant, a change in the length of the construction 15 causes the spindle head 12 to be pivoted about the vertical axis 16, that is to say to make a circular path in the X / Y plane. If both constructions 14, 15 are lengthened or shortened evenly, the spindle head 12 describes a straight line which runs vertically downwards or upwards in FIG. 1. During this movement, the spindle head 12 is essentially moved so that the moved mass is small compared to the mass of the entire machine tool.
  • the two constructions 14, 15 can on the one hand hold the spindle head 12 perpendicular to the plane of the drawing, i.e. in the Z direction, but on the other hand the spindle head can also be held by a suitable frame, so that the constructions 14, 15 merely move the spindle head 12 have to effect.
  • FIG. 2 A second embodiment is shown in FIG. 2 in a representation like FIG. 1, in which the construction 15 is a Lever gear 25 comprises, which carries the spindle head 12 in the Z direction.
  • the lever gear 25 comprises a first lever arm 26 which is pivotally mounted on the support plate 11 about the axis 17.
  • a second lever arm 27 of the lever gear 25 is pivotally attached at one end to the first lever arm 26 and at the other end about the further vertical axis 23 on the spindle head 12.
  • the change in length of the construction 15, that is to say the change in the distance of the spindle head 12 from the vertical axis 17, is effected by a linear drive 28, which in the exemplary embodiment shown is a piston-cylinder unit 29.
  • the piston-cylinder unit 29 is articulated to both the first lever arm 26 and the second lever arm 27, so that the opening angle ⁇ increases or decreases, that is, the lever mechanism 25 stretches or contracts when the piston-cylinder unit 29 is extended or retracted in the direction of an arrow 31.
  • the construction 15 according to FIG. 2 on the one hand fulfills the task as in FIG. 1, namely it ensures a change in the distance between the vertical axis 17 and the spindle head 12, but on the other hand carries the spindle head 12, thus ensuring a corresponding rigidity of the new machine tool 10th
  • the construction 14 also has a lever gear 32 with a first lever arm 33, a second lever arm 34 and linear drives 35, the change in length of which in the direction of an arrow 36 leads to the fact that the Distance between spindle head 12 and vertical axis 16 is changed.
  • FIG. 4 shows a further exemplary embodiment in which the further vertical axis 23 is replaced by a bearing construction.
  • the spindle head 12 is fastened here by ribs 38 to an inner ring 39 which can be rotated relative to a bearing ring 41 surrounding it, for which purpose a ball bearing 42 is provided between the two rings 38, 41.
  • the lever arm 27 is fixed to the bearing ring 41 and the lever arm 34 is fixed to the inner ring 39. Due to the selected construction, the further vertical axis 23 now falls into the axis of rotation of the ball bearing 42, that is to say it is centered on the spindle head 12.
  • the two lever gears 25, 32 each have a joint 44, 45 which can be opened and closed in the direction of an arrow 46 and 47, respectively.
  • a rotary drive 48, 49 is provided, which acts directly on the joint 44 or 45 and changes the opening angle ⁇ .
  • linear drives again, as shown in Fig. 3.
  • lever arms 26, 27, 33, 34 each have the same length, so that because the vertical axis 23 coincides with the center of the spindle head 12, absolutely symmetrical conditions result, thereby preventing canting, etc. can.
  • FIG. 5 the machine tool 10 from FIG. 4 is shown schematically in perspective from the side, a covering 50 of the machine tool 10 being merely indicated.
  • a number of schematically indicated tool changers 41 can be seen, each carrying a tool, of which a tool in use is indicated at 52.
  • a workpiece 54 clamped on a workpiece table 53 is processed via the tool 52, for which purpose the tool 52 can be moved in the direction of a coordinate system indicated at 55.
  • two linear guides 57, 58 are provided, on which the carrier plate 11 can be moved in the Z direction.
  • the spindle head 12 is supported by the two constructions 14, 15 from FIG. 4 on the machine frame 59 via this carrier plate 11.
  • the lever arms 26, 27, 33, 34 are formed here by plates 61, 62, 63, 64, which have approximately the dimensions of the spindle head 12 in the Z direction and have a corresponding thickness, so that they are very stiff overall.
  • the plates 61 and 64 are arranged on the support plate 11 by means of joints in such a way that they are about the vertical axes 16, 17 are pivotable.
  • the plates 62 and 63 are articulated to the plates 61 and 64 via the joints 44, 45, the plates 62 and 63 being pivotable relative to one another about the further vertical axis 23 and also carrying the spindle head 12 there as shown in FIG the top view of FIG. 4 is shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

Une machine-outil (10) présente un bâti (59) sur lequel est monté un nez de broche (12). Ce dernier peut se déplacer dans un plan horizontal (X/Y) par rapport à n'importe quel point choisi pour usiner une pièce (54). Deux structures de longueur variable sont montées à distance l'une de l'autre sur le bâti (59), de manière à pouvoir pivoter respectivement autour d'un axe vertical (16, 17), et sur le nez de broche (12) de manière à pivoter l'une par rapport à l'autre autour d'un autre axe vertical (23).
PCT/EP1998/006073 1997-09-30 1998-09-23 Machine-outil WO1999016576A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19743149.6 1997-09-30
DE1997143149 DE19743149A1 (de) 1997-09-30 1997-09-30 Werkzeugmaschine

Publications (1)

Publication Number Publication Date
WO1999016576A1 true WO1999016576A1 (fr) 1999-04-08

Family

ID=7844118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006073 WO1999016576A1 (fr) 1997-09-30 1998-09-23 Machine-outil

Country Status (2)

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DE (1) DE19743149A1 (fr)
WO (1) WO1999016576A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19757886C2 (de) * 1997-12-24 2001-11-29 Rolf Wissner Vorrichtung zur Positionierung eines ersten Maschinenteils gegenüber einem zweiten Maschinenteil
DE19853757C2 (de) * 1998-11-21 2001-02-15 Rolf Wissner Meßvorrichtung für die Positionsbestimmung eines Maschinenteils
DE19930287A1 (de) * 1999-07-03 2001-01-04 Klaus Dagefoerde Gelenkarmbearbeitungsmaschine
ITTO20030502A1 (it) * 2003-07-01 2005-01-02 O M V Ohg Venete S R L Macchina a controllo numerico.
DE102010006504B4 (de) 2010-01-28 2013-11-21 Chiron-Werke Gmbh & Co. Kg Verfahren zur Bestimmung der Position eines Werkzeuges
LU93157B1 (en) * 2016-07-21 2018-01-23 Aron Jinaru Angular positioning generator device with variable speed and torque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108552A1 (de) * 1980-03-07 1982-02-18 Lais AG, 4056 Basel Vorrichtung zur parallelverschiebung zweier in einander beabstandeten, parallelen ebenen liegenden tragelemente an hebezeugen oder foerdereinrichtungen
US5028180A (en) * 1989-09-01 1991-07-02 Sheldon Paul C Six-axis machine tool
US5592793A (en) * 1995-06-07 1997-01-14 Merrick Machine Co. Router machine
EP0779126A1 (fr) * 1995-12-15 1997-06-18 Chiron-Werke GmbH & Co. KG Machine-outil avec plusieurs unités d'entraînement
GB2308322A (en) * 1995-12-18 1997-06-25 Honda Motor Co Ltd Machine tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108552A1 (de) * 1980-03-07 1982-02-18 Lais AG, 4056 Basel Vorrichtung zur parallelverschiebung zweier in einander beabstandeten, parallelen ebenen liegenden tragelemente an hebezeugen oder foerdereinrichtungen
US5028180A (en) * 1989-09-01 1991-07-02 Sheldon Paul C Six-axis machine tool
US5592793A (en) * 1995-06-07 1997-01-14 Merrick Machine Co. Router machine
EP0779126A1 (fr) * 1995-12-15 1997-06-18 Chiron-Werke GmbH & Co. KG Machine-outil avec plusieurs unités d'entraînement
GB2308322A (en) * 1995-12-18 1997-06-25 Honda Motor Co Ltd Machine tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KRAINEV A F ET AL: "WORKPIECE AND TOOL MOVEMENT MECHANISMS FOR NONTRADITIONAL ARRANGEMENT MACHINES", RUSSIAN ENGINEERING RESEARCH, vol. 15, no. 7, 1 July 1995 (1995-07-01), pages 44 - 49, XP000589648 *

Also Published As

Publication number Publication date
DE19743149A1 (de) 1999-04-08

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