EP1807242A1 - Machine-outil tres flexible comprenant plusieurs supports de piece - Google Patents

Machine-outil tres flexible comprenant plusieurs supports de piece

Info

Publication number
EP1807242A1
EP1807242A1 EP05797380A EP05797380A EP1807242A1 EP 1807242 A1 EP1807242 A1 EP 1807242A1 EP 05797380 A EP05797380 A EP 05797380A EP 05797380 A EP05797380 A EP 05797380A EP 1807242 A1 EP1807242 A1 EP 1807242A1
Authority
EP
European Patent Office
Prior art keywords
machine tool
tool according
net
workpiece
processing units
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Withdrawn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
EP05797380A
Other languages
German (de)
English (en)
Inventor
Frank Baumbusch
Walter Bauer
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.)
Witzig and Frank GmbH
Original Assignee
Witzig and Frank 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 Witzig and Frank GmbH filed Critical Witzig and Frank GmbH
Publication of EP1807242A1 publication Critical patent/EP1807242A1/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Withdrawn legal-status Critical Current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
    • B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/14—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines
    • B23Q7/1415—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting co-ordinated in production lines with a series disposition of working devices not corresponding with the sequence of the working
    • 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
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/04—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps
    • 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
    • B23Q41/00—Combinations or associations of metal-working machines not directed to a particular result according to classes B21, B23, or B24
    • B23Q41/02—Features relating to transfer of work between machines
    • 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
    • Y10T29/5124—Plural diverse manufacturing apparatus including means for metal shaping or assembling with means to feed work intermittently from one tool station to another
    • 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
    • Y10T483/00—Tool changing
    • Y10T483/16—Tool changing with means to transfer work
    • Y10T483/165—Plural machine tools, e.g., flexible manufacturing

Definitions

  • the invention relates to a machine tool.
  • Such a machine tool is known from DE 43 Ol 393 C2.
  • This machine tool is designed as a rotary transfer machine. It has a work space in which a cross-shaped workpiece carrier is arranged. At the 9. ⁇ surfaces of the arms planet tables are arranged for workpiece holder. The workpiece carrier is rotated in 90 ° increments. The workpieces held on the arms of the workpiece carrier pass through each processing station one after the other.
  • a machining station includes at least one machining unit with at least one machining spindle, to which, for example, milling or drilling tools can be fastened.
  • Machine tool has a cage-like horritus ⁇ space in which a turntable is arranged hanging. These are polygonal edged. He carries on his outside Plane ⁇ tentische. Machining units are arranged around the machine frame, with their angular orientation and
  • training is selected workpiece-specific.
  • DE 43 16 166 B4 discloses a vertical lathe machine which has a first headstock, which is mounted horizontally and vertically on a slide, and a second headstock, which is arranged in a stationary manner on a machine frame.
  • the dormant spin box is associated with a movably arranged tool carrier.
  • the movable headstock is assigned a dormant arranged tool carrier. The guideway of the movable headstock passes by the stationary spindle box, so that workpieces can be transferred in the opposite position.
  • Another flexible lathe is known from DE 199 04 859 Al. This has two triaxially movable, oppositely arranged chuck for a workpiece.
  • the headstocks are also pivotally mounted so as to be able to pivot the axis of rotation from a horizontal saw into a vertical position in which the machining takes place by means of tools which are held in a tool carrier arranged below the spindles.
  • the spindles are in certain
  • Rotary position lockable by shut-down devices All machining operations to be performed on the workpiece must be completed with the tools provided on the tool holder.
  • the machine tool according to the invention has an operating space in which at least two workpiece carriers are arranged. Both workpiece carriers are connected to traversing devices, so that they can be moved at least two-dimensionally in the working space.
  • the traversing devices define traversing ranges that lie in the working space.
  • the traversing ranges of the two workpiece carriers can be determined independently of each other. This means that one workpiece carrier can travel a different path than the other workpiece carrier. Nevertheless, both paths can be set so that each workpiece carrier moves all machining units or only selected machining units in order to have machining operations of the workpiece carried out there. With this concept of mutually independent movement of several tools in a common work space on optionally different paths, a high degree of flexibility is achieved.
  • the path of the relevant workpiece carrier can be programmed ent ⁇ accordingly, so that only a short path through the machine and a short processing time arises. In a rotary transfer machine, the workpiece would have to go through the entire route in any case.
  • the travel ranges of the workpiece carriers can overlap each other completely or partially.
  • a partial overlap is sufficient, wherein the overlapping region preferably includes all but at least one processing position which is defined by a position that can be taken by a processing unit.
  • the traversing devices can be formed by spindle lifting drives, rack drives or preferably at least partially by linear motors.
  • linear motor drives are preferred for longer travel ranges, while short travel ranges can be achieved by motor gear arrangements.
  • the linear motor defines a direction of movement in which several processing devices can be achieved.
  • the engine / transmission devices can be used to effect only short feed movements or the like.
  • the movements of the workpiece carriers are preferably two-dimensional, ie biaxial. Preferably, both lie Movement directions in a common plane, preferably a horizontal plane.
  • the directions of movement of several processing units are preferably arranged in a common plane.
  • the traversing devices can, if necessary, also be provided with a third direction of movement (axis) so that they can perform real 3D movements (spatial movements). While in the first case the travel ranges are defined by areas, in the second case they are defined by the volumes which can be passed through in principle.
  • the workpiece holders can be pivoted about at least one, but preferably about two axes. This makes a true five-axis five-sided machining of every workpiece possible.
  • the workpiece carriers can be provided with an automatic tensioning device. This makes it possible, in particular by overlapping the traversing areas, to transfer workpieces in the working space from one workpiece carrier to another workpiece carrier. By this measure, a true six-side machining can be achieved, with no manual re-clamping of the workpiece is required. The workpiece does not have to be moved out of the working space for re-clamping. This measure thus provides maximum flexibility. The production-related restrictions with regard to the machine tool to be observed in the design of workpieces are reduced to a minimum.
  • the at least one processing unit is associated with a positioning unit which permits movement of the processing unit in at least one direction but preferably in two or more directions.
  • the Zustell ⁇ movement can be both by a movement of the workpiece as also done by a movement of the tool. It is also possible to bring the tools of two or more machining units into engagement with the workpiece at the same time. The number of possible positioning directions of the machining units that are active at the same time may be different. It is for example possible that a processing unit arranged below the workpiece can only perform an axial feed movement while a processing unit arranged above the tool can be moved in three positioning directions. If milling is to be performed with the lower tool, the workpiece is moved accordingly. The upper tool then follows this movement, this movement still being superimposed on its own feed movement.
  • the positioning units for the processing units can also each contain at least one linear motor.
  • the linear motor is preferably assigned to the occurring largest adjustment path. As a rule, this is a path oriented transversely to the axis of rotation of the tool.
  • the processing units may be provided with turrets to hold several tool spindles with multiple tools.
  • tool magazines can be provided which cooperate with corresponding tool changing devices in order to exchange the tools on individual work spindles.
  • the processing units are usually arranged at different points of the travel range, so that they can be approached one after the other.
  • the driving range spans at least two processing units, so that Follow-up work can be done.
  • the machining units are, for example, work spindles with tools for machining, such as milling, drilling, thread cutting, grinding, polishing, lapping and honing.
  • processing units can be provided for eroding or for carrying out assembly operations.
  • a typical Monta ⁇ ge process is the pressing of sockets, the insertion of screws or the like.
  • FIG. 2 shows the machine tool according to FIG. 1 in a schematized plan view with shaded identification of the existing travel ranges
  • FIG. 3 shows a modified embodiment of a machine tool in front view
  • FIG. 4 shows the machine tool according to FIG. 3 in a schematic plan view
  • FIG. 5 shows a further modified embodiment of the machine tool according to the invention in front view
  • FIG. 6 shows the machine tool according to FIG. 5 in a schematized plan view
  • FIG. 7 shows the machine tool according to FIG. 5 in a schematic, fragmentary rear view
  • FIG. 8 shows a traversing device of one of the machine tools according to FIG. 1 to FIG. 6 in a diagrammatic representation.
  • FIG. 1 illustrates a machine tool 1 which has a preferably cage-like machine frame 2 which encloses a working space 3.
  • the working space is preferably closed to the outside insofar as chips, dusts and cooling lubricants can not reach the outside to a significant degree.
  • the workpieces 5, 6 are workpiece carriers 7, 8 individually associated. These are illustrated in FIGS. 1 and 2 in different positions.
  • Each workpiece carrier 7, 8 preferably carries a workpiece clamping station designed as a planetary table 9, 10, which is provided with automatic clamping means not illustrated further, for example pressure-medium-actuated collets.
  • the planetary table 9, 10 permits rotation and positioning about an axis oriented perpendicular to the clamping surface, as indicated by arrows 11, 12 in FIGS. 1 and 2, and fixation of the workpiece in predetermined pivoting positions.
  • the workpiece carrier 7, 8 is further supported by a boom 13, 14 which is rotatably mounted about its longitudinal axis. The corresponding direction of rotation is indicated in FIGS. 1 and 2 by arrows 15, 16.
  • the workpiece is in turn fixable in definable pivot positions. Furthermore, the arms 13, 14 are movable in two or, as shown, three linear directions of movement X, Y, Z. This is achieved with a transport device 17, which exemplarily illustrates the workpiece carrier 7 and the extension 13 in FIG is. Such a displacement device can be provided for the workpiece carrier 8.
  • the displacement device 17 has a linear motor 18 for adjustment in the X direction, the movable section of which is connected to a carriage 19.
  • the carriage 19 is guided on rails 21 extending in the X-direction e.g. extend horizontally.
  • the straight rails 21 have a length which is so great that the boom 13 can move with the workpiece carrier 7 both through the entire working space 3 and into the assembly space 4.
  • FIG. 8 illustrates the traversing device for three travel axes.
  • the carriage 19 In order to enable an adjustment in the vertical Y-direction, the carriage 19 in turn carries rails 22 on which a vertically adjustable (positionable) slide 23 is mounted. This carries rotatably mounted the boom 13. For rotation and Positio ⁇ ning of the boom 13, a motor 24 is provided.
  • a motor 25 causes a linear positioning of the cantilever 13 in its longitudinal direction, which forms the Z-direction.
  • a further motor 26 serves for positioning in the Y direction.
  • a motor 27 which serves for rotation and positioning of the planetary table.
  • Such displacement devices can be provided for each workpiece carrier 7, 8.
  • the traversing device 17 can also be modified so that the motor 26 and the associated rails 22 are left out, so that only two-axis linear adjustment is possible.
  • the traversing devices 17 define their own traversing ranges 28, 29 for the respective tool carriers 7, 8, which are shown hatched in FIG.
  • the travel ranges 28, 29 are each limited by a dash-dotted line 31, 32 illustrated.
  • a central region 24, which carries a cross hatch in FIG. 2 the traversing regions 28, 29 overlap.
  • the region 34 can thus be traversed by both workpiece carriers 7, 8 and thus by both workpieces 5, 6.
  • On both sides of the region 34 there are zones which only belong to the travel region 28 or the travel region 29 and thus can only be traversed by the one workpiece carrier 7 or only by the other workpiece carrier 8.
  • At least one but preferably a plurality of processing units is provided on the machine frame 2, of which one processing unit 35 is exemplified in FIG. They are arranged at the top of the machine frame 2 in a row, their central axis being marked in FIG. 2 in each case by a cross 36, 37, 38.
  • the processing units are largely identical to each other. You have e.g. a turret 39, the rotatable Revolver ⁇ part 41 a plurality of work spindles 43, 44 has. For example, the revolver 41 is provided with eight spindles. At each a tool 44, 45 can be attached.
  • the turret 39 is assigned a positioning unit 46 in order to move the revolver 39 in at least one direction, e.g. to move the Y-direction.
  • a corresponding servo motor 47 serve.
  • a linear motor 48 or other linear drive may be provided to rotate the revolver 39 e.g. along in Z-direction oriented
  • the workpiece carriers 7, 8 are moved alternately into the mounting space 4.
  • the workpiece carrier 7 is shown in dashed lines in the loading position. Here you can change workpieces by manual or machine access.
  • the tensioned workpiece 5 then passes through a path which leads through the region 34. This path leads to at least one processing station 35 or even to several. For example, all processing units marked by the crosses 36, 37, 38 (FIG. 2) can be traversed.
  • the tool carriers 7, 8 can, as illustrated in FIG. 2, successively pass through the same processing path, before and after going their separate ways.
  • the workpiece 5 as well as the workpiece 6 can be posi ⁇ tioned any. It can be moved linearly in X, Y and Z directions. It can be pivoted by the workpiece carrier 7, 8 according to the arrow 15 or 16 about the longitudinal axis of the respective arm 13, 14 is pivoted. In addition, the respective planetary table 9, 10 rotated were ⁇ the. Thus, both a pure five-side machining at a stationary workpiece 5, 6 as well as a machining at beweg ⁇ tem workpiece 5, 6, such as rotary milling, possible.
  • Chips generated in the working space 3 can be discharged by a chip conveyor 52, which is symbolically indicated in FIGS. 1 and 2.
  • Figures 3 and 4 illustrate a modified embodiment of the machine tool 1. While in the machine tool 1 both traversing areas 28, 29 are arranged parallel to each other and overlapping each other in a strip-shaped area 34, are the traversing ranges 28, 29 in the machine tool 1 of Figure 4 at right angles to each other. Other angular orientations can also be used.
  • the machine has a common machine frame 2, which is designed in the manner of an angle. At the ends of its legs, the mounting spaces 4a, 4b are formed.
  • Machining units 35 are arranged below the machining plane defined by the workpieces 5, 6. These lower processing units 35 are in turn designed as Kronenre ⁇ volver. They are adjustable in at least one direction, for example the vertical Y direction. In addition, they can be adjustable in a horizontal direction (Z direction and / or X direction). Otherwise, the above description applies.
  • both workpiece carriers 7, 8 can work completely independently of one another by the processing units being used individually by the workpiece carrier 7 in the crosses 36a, 37a and by the processing units the crosses 36b, 37b is used individually by the workpiece carrier 8.
  • the processing unit at the cross 38 can be shared.
  • this position can be used as a transfer position.
  • the workpiece carrier 8 is then in the position illustrated in FIG. 4. This can be approached by the workpiece carrier 7. If this is initially empty, it can take over, grasp and clamp the workpiece held by the workpiece carrier 8, whereupon the workpiece can be released from the workpiece carrier 8. This takes place in the working space 3 Umspannvorgang allows a true six-sided machining.
  • the machine tool 1 can be used both as a six-side processing machine for a workpiece, which is inserted into the machine tool in the placement space 4b and removed from the machine tool 1 in the mounting space 4a, and as a machine tool attached to the machine Assembly rooms 4a and 4b each receives and dispenses workpieces that have been individually processed.
  • a very high flexibility is possible and nevertheless high productivity is achieved.
  • FIGS. 5 and 6 illustrate another embodiment of the machine tool 1. It has, for example, eight processing units, four of which are arranged on the machine frame 2 at the top and two or four further on the machine frame 2 at the bottom.
  • the positioning devices and the displacement devices are designed as above.
  • the revolvers 39 serve to bring different tools held on different work spindles into the working position in order to successively produce different working tools. Form operations on the respective workpiece.
  • the movement regions 28, 29 can adjoin one another approximately in the center of the working space 3 and overlap there more or less or even not at all.
  • the processing units arranged on the left in FIGS. 5 and 6 are assigned individually to the workpiece carrier 7.
  • the processing units arranged on the right in FIGS. 5 and 6 are individually assigned to the workpiece carrier 8.
  • a section 53 can be grown, in which the traversing areas 28, 29 overlap.
  • This overlapping can be achieved, for example, by appropriate programming of the displacement device 17 or its control.
  • an overlapping region 34 can again be achieved which, for example, can be used as a transfer region for transferring workpieces from the workpiece carrier 7 to the workpiece carrier 8.
  • one or more processing units can also be arranged here.
  • assembly units can be provided, for example for pressing in bushings or for carrying out other assembly operations.
  • the processing units are preferably provided with Revol ⁇ vern 39.
  • processing units 35a which have only a single work spindle 54 with a single tool 55. This is illustrated by way of example in FIG. 5 as well as in FIG.
  • a disc-shaped tool change magazine 54a may be provided to hold further tools ready. This is always meaningful when all tools are to be arranged on the machine tool for the machining of a specific part spectrum, so that a machine conversion can take place automatically.
  • Such a tool change magazine also makes sense if the work hard to be machined workpieces to take place, to which several identical tools (sister tools) can vorgese ⁇ hen, which allow automatic tool change at end of life.
  • processing units instead of the illustrated processing units, it is also possible to use other processing units.
  • the working space 3 is largely closed to the outside.
  • the space between the rails 21 can be used.
  • the present here in the machine frame 2 and between the rails 21 window is bridged by the carriage 19, which ultimately leads the boom 13.
  • the carriages 19 are joined by bellows-type shutters 56, 57 on both sides. These follow the movements of the carriage and cover while the left between the rails 21 window.
  • the blinds 56, 57 are connected by a coupling means 58 to the carriage 19. Die ⁇ ses is solvable.
  • the window can be opened, for example, by first moving the carriage into its right or left extreme position, in which one of the two blinds, for example the blind 57, has its shortest length, ie is completely pushed together.
  • the shutter can be locked in this position, for example, with socket pin on geeig ⁇ Neten, provided on the machine frame 2 holes 59 or other coupling means, whereas the coupling is released to the carriage 19. If the carriage 19 now moves into its other extreme position, it releases the window without it being covered by the shutter 57. At the same time the blind 56 is pushed together.
  • Both blinds 56, 57 or only one of them can be detachably connected to the carriage 19 and can be fixed to the machine frame 2 by means of suitable means, for example, locking pins.
  • a machine tool 1 has a working space 3 in which two workpiece carriers 7, 8 can move independently of one another. In addition, several tools 44, 45 are arranged in the working space. The workpiece carriers 7, 8 are associated with displacement devices 17, the travel ranges 28, 29 determine. These overlap each other in a region 34 in which a processing unit 35 can be arranged.
  • Such a machine tool achieves a very high flexibility with regard to the workpieces to be produced, as well as high productivity. The machine tool 1 thus allows the achievement of high levels of automation even with small series.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Multi-Process Working Machines And Systems (AREA)

Abstract

La présente invention concerne une machine-outil (1) présentant une chambre de travail (3) dans laquelle deux supports de pièces (7, 8) peuvent se déplacer indépendamment l'un de l'autre. La chambre de travail présente également plusieurs outils (44, 45). Des dispositifs de déplacement définissant des zones de déplacement sont associés aux supports de pièce (7, 8) et se chevauchent dans une zone où peut se trouver une unité d'usinage (35). Une telle machine-outil permet d'obtenir une flexibilité très élevée par rapport aux pièces à produire, ainsi qu'une grande productivité. Elle permet également d'obtenir de hauts degrés d'automatisation, même pour de petites séries.
EP05797380A 2004-10-15 2005-10-07 Machine-outil tres flexible comprenant plusieurs supports de piece Withdrawn EP1807242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004050199A DE102004050199A1 (de) 2004-10-15 2004-10-15 Hochflexible Werkzeugmaschine
PCT/EP2005/010808 WO2006042645A1 (fr) 2004-10-15 2005-10-07 Machine-outil tres flexible comprenant plusieurs supports de piece

Publications (1)

Publication Number Publication Date
EP1807242A1 true EP1807242A1 (fr) 2007-07-18

Family

ID=35462164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05797380A Withdrawn EP1807242A1 (fr) 2004-10-15 2005-10-07 Machine-outil tres flexible comprenant plusieurs supports de piece

Country Status (4)

Country Link
US (1) US20080188363A1 (fr)
EP (1) EP1807242A1 (fr)
DE (1) DE102004050199A1 (fr)
WO (1) WO2006042645A1 (fr)

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