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WO2018033605A1 - Machine-outil - Google Patents

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Publication number
WO2018033605A1
WO2018033605A1 PCT/EP2017/070878 EP2017070878W WO2018033605A1 WO 2018033605 A1 WO2018033605 A1 WO 2018033605A1 EP 2017070878 W EP2017070878 W EP 2017070878W WO 2018033605 A1 WO2018033605 A1 WO 2018033605A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
workpiece carrier
machine tool
coupling
tool according
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.)
Ceased
Application number
PCT/EP2017/070878
Other languages
German (de)
English (en)
Inventor
Sascha Jaumann
Ralf WERNI
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 WO2018033605A1 publication Critical patent/WO2018033605A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • B23Q1/5406—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 perpendicularly 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
    • B23Q1/50—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
    • 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
    • B23Q1/64—Movable or adjustable work or tool supports characterised by the purpose of the movement
    • B23Q1/66—Worktables interchangeably movable into operating positions
    • 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
    • B23Q7/02—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 by means of drums or rotating tables or discs

Definitions

  • the invention relates to a machine tool according to the preamble of
  • Machine tools or machining centers for machining workpieces in series production usually have workpiece carriers on which the workpieces to be machined are stretched.
  • workpiece carriers on which the workpieces to be machined are stretched.
  • such workpieces can be arranged outside of the machining center on workpiece pallets, so that only the already loaded pallets must be changed when changing the workpiece, the clamping system of the pallet essentially independent of the piece is.
  • a problem with such a pallet change remains that comparatively much time passes until the pallet with the machined workpiece has moved out of the working space and the pallet with the workpiece to be machined is moved from the loading place into the working space.
  • the workpiece carriers are held on the drum-like changing device, with rotary axes of the workpiece carriers and their drives are held on a drum-like carrier of the changing device.
  • two drives are thus assigned to each workpiece carrier and mounted on the drum-like changing device. Accordingly, when using two workpiece carriers, a total of four drives for the A rotary axes are held on the drum-type carrier of the changing device.
  • At least one rotary table which can be adjusted around a B rotary axis is mounted on each workpiece carrier on which the workpieces to be processed are clamped.
  • the device-technical effort for the changing device is further increased.
  • the power flow in such solutions unfavorable over the or the rotary tables in the working space in the bridge and from there via the drive of the A-axis in the carrier of the changing device and then continue on the mounting of the pivot axis in the machine frame in the direction of the tool side machine stand / -gestive.
  • the invention has for its object to provide a machine tool or a machining center, in which with improved flow of power device complexity is reduced. This task is performed by a machine tool with the characteristics of
  • the machine tool according to the invention has a changing device - also called double reversing vice - for workpieces and at least one along linear guides movable tool spindle, which are mounted on a machine frame / machine stand.
  • the changing device has one, preferably at least two workpiece carriers, which are held on a support. This is pivotable about a pivot axis by means of a pivot drive in order to pivot a workpiece carrier from a working space into a loading space or a workpiece carrier from the loading space into the working space.
  • the at least one workpiece carrier is pivotable about a rotary axis (A) by means of a workpiece carrier drive.
  • the tool carrier drive is mounted approximately on the working space side in the machine frame and can be connected in a rotationally fixed manner to the respective work space side workpiece carrier via a mechanical interface / coupling.
  • both workpiece carriers are each provided with a workpiece carrier drive, although only one of these drives is required in the working space, while the second drive arranged in the loading space has no function or is at most activated for positioning during loading.
  • the number of drives required is thus significantly lower in the solution according to the invention than in the prior art, so that both the use of material and the space required due to the saving of the second workpiece carrier drive is significantly reduced.
  • less torque is required for the pivoting of the workpiece carrier bearing torque, since a workpiece carrier drive is eliminated.
  • the workpiece carrier drive is mounted in the machine frame, the power flow described above is significantly improved, since the force is introduced from the workpiece carrier directly on the workpiece carrier drive in the machine frame - the burden of the carrier or the changing device is thus compared to the conventional solutions clearly reduced.
  • a further advantage of the solution according to the invention is that a direct transfer of impacts from the loading side to the working space side on which the precision machining takes place is achieved by the direct coupling into the machine frame. is avoided. Such impacts can be done, for example, from manual or automated loading and would thus affect the accuracy or surface quality of the processing.
  • the power flow within the machining center is further optimized if the workpiece carrier drive is designed as a gantry drive with drives arranged on both sides on the rotary axis of the workpiece carrier. These drives are each designed with a clutch in the above sense, via which the power flow can be made or interrupted by the two drives to the workpiece carrier.
  • the coupling has a arranged on the workpiece carrier coupling head with a radially extending or parallel thereto coupling surface and a drive-side, for example, on a spindle of the drive arranged, coupling piece which has a complementary to the coupling surface formed driving surface.
  • the coupling is designed such that the two abovementioned surfaces can preferably be brought into their coupling position in the tangential direction (that is, transversely to the axis) or in the axial direction of the rotary axle.
  • the coupling / interface for coupling the workpiece carrier is preferably located on a spindle of the workpiece carrier drives.
  • an axial Ankoppel Gay may be advantageous - but this then requires an axial movement of the anvil.
  • the coupling / interface for coupling the workpiece carrier is preferably located on a spindle of the workpiece carrier drives. This interface is designed in such a way that the coupling process takes place via a movement tangential to the changing device.
  • the frictional connection is preferably via coupling elements which extend transversely to the plane of the coupling surface and the driving surface.
  • These coupling elements can be designed, for example, as zero point clamping systems or clamping cones.
  • the workpiece carrier has at least one potted on this rotary table, which is rotatable about a further rotary axis (B rotary axis) by means of a rotary table drive.
  • the machine tool / the machining center is designed to be particularly flexible when the rotary table is designed modular, so that it can be driven without any structural change with different rotary table drives, such as a servo motor with gear or a torque motor. These both preferably engage from the same side on the rotary table or more precisely on the workpiece-carrying module of the rotary table.
  • a "rotary table” can also be used as a workpiece carrier drive.
  • the structure of the machine tool is particularly compact when the changing device is formed with a drum-like carrier and has two end-side drum walls in which the rotary axes (A-axis) of the workpiece carrier are mounted.
  • the carrier also has a pivot axis which is supported on the machine stand.
  • the aforementioned pivotal drive acts on the drum wall, so that due to the large diameter of the drum, a pivot drive with low power is sufficient to transmit a high torque to the carrier.
  • the torsional rigidity can be relatively easily realized due to the large difference in diameter between the drum and the rotary actuator.
  • the power flow can be further uniform, even if the rotary actuator is designed as a gantry drive.
  • the pivot drive has a gear, which is preferably designed as a traction mechanism or as a hollow shaft gear.
  • a traction device can wrap around a drum wall in the region of the largest diameter.
  • a drive pinion in operative connection with the traction means is mounted on a drive shaft. It is particularly preferred if each drum wall, a traction means and a drive pinion are assigned net, which is rotatably connected to the drive shaft. The latter is then
  • Such a traction mechanism can be, for example, a chain drive, a toothed belt drive, a flat belt drive, a V-belt drive, a gear drive or the like.
  • the drive By driving the drum-like carrier via two traction means and two drive pinions, which are driven by a common continuous drive shaft, the drive acts on two sides, so that no action must be taken to - to absorb the torsion on the opposite side - as in a one-sided drive - This would require a very torsionally rigid support.
  • the rigidity of the machine tool can be further increased if the workpiece carrier drive, the pivot axis and the drive shaft each extend in the region between two frame side walls on which these components are mounted. That the forces resulting from these drives are introduced directly into the machine frame in this solution, with the stiffness is optimized by suitable design of the two frame side bolsters.
  • the energy supply to the workpiece carriers is preferably via permanently connected energy chains, so that no docking is required.
  • further media traces can also be formed via a docking.
  • the docking preferably takes place outside the working space. Due to the modular design of the changing device (double reversing vice), it can be flanged to the machine stand / machine frame without significant conversions from the front, ie from the loading space / loading point.
  • the machining accuracy by means of the machine tool / machining center can be further improved if an indexing unit for indexing during pivoting and docking / coupling is associated with the pivot axis or the changing device.
  • an indexing unit for indexing during pivoting and docking / coupling is associated with the pivot axis or the changing device.
  • To compensate for, for example, caused by temperature changes of the workpiece carrier can be performed with an X and / or Y compensation.
  • the drive of the workpiece carrier is preferably biased. This can be done, for example, that the workpiece carrier is made with bias and this bias is then compensated by the rotary axis drive.
  • the drives for the axes described can be biased so that a backlash-free transmission of the drive torque is ensured on the respective axis.
  • Figure 1 is a three-dimensional schematic diagram of a processing center according to the invention.
  • FIG. 2 shows a machine frame of the machine tool according to FIG. 1 with a double-turn clamp
  • FIGS. 3a and 3b show three-dimensional views of the double clamp according to FIG. 2
  • FIG. 4 shows the double reversing vice from FIGS. 2 and 3 in a detail view
  • FIGS. 5a and 5b show a drive of the double-turn vice according to FIGS. 2 to 4;
  • FIG. 6 shows a workpiece carrier of the double-turn tensioner according to FIGS. 1 to 5, with a bridge;
  • FIGS. 7a, 7b show a drive of an A-axis for pivoting a bridge according to FIG. 6;
  • FIGS. 8a, 8b show a round table of the bridge according to FIG. 6;
  • FIG. 9 shows an alternative pivoting drive of the double-turn vice of a machine tool according to FIG. 1;
  • Figure 10 shows a way to bias a workpiece carrier according to Figure 6;
  • Figure 1 1 is a concept for compensating for changes in the length of the bridge in the X direction (X compensation) and Figure 12 is a concept for a compensation of a working spindle offset in the Y direction (Y compensation).
  • FIG. 1 shows a three-dimensional representation of a machining center according to the invention, referred to hereafter as machine tool 1.
  • the machine tool 1 is designed in this embodiment as a double spindle with two designed as single quill work spindles 2, 4.
  • the machine tool can also be performed with only one spindle or more spindles, for example as a four-spindle or six-spindle.
  • a monoblock quill is preferably used for all spindles.
  • the sleeves of the work spindles 2, 4 are guided in the Z direction (ie in the direction of the spindle axis) movable on a carriage 5 of the machine tool 1.
  • the carriage 5 is adjustable along a vertical Y-axis on a frame 8 of a machine frame 6 by means of two linear drives 12, 10.
  • This frame 8 is in turn movable via a linear drive 24 along an X-axis (see also Figure 2).
  • a monoblock quill can be used in which two or more spindles are accommodated.
  • the tools required in the machining of the workpieces are stored in a tool magazine 13, in which these tools 15 are received with their axes in the horizontal direction (X direction).
  • This tool magazine 13 thus extends approximately in the horizontal direction above the work spindles 2, 4.
  • a torpedo changer 17 is provided for long tools in the area above the work spindles 2, 4.
  • a hydraulic unit 14 In the region of the machine tool 1 indicated on the right in FIG. 1, inter alia, a hydraulic unit 14, a central lubrication unit and other devices for supplying energy / fuel are arranged.
  • FIG. 1 a part of a panel 16 of the machine tool 1 is removed so that a working space 18 and a loading space 20 are visible.
  • Two-turn clamp 22 is formed, which has two workpiece carriers described in more detail below, one of which is arranged in the loading space, so that it can be loaded with workpiece blanks to be machined.
  • the other workpiece carrier is arranged in the working space 18, so that the workpieces clamped there can be processed simultaneously via the work spindles 2, 4. Details of the double reversing vice 22 will be explained with reference to the following figures.
  • Figure 2 shows a partial view of the machine tool 1, wherein the above-described linear axis kinematics of the work spindles 2, 4 is omitted. Visible is only the aforementioned linear axis 24, over which the frame 8 in the horizontal direction (X-axis) is adjustable.
  • the double reversing clamp 22 is mounted pivotably on the machine frame 6. This is stored as a frame with left and right side cheeks 26, 28 of the machine frame.
  • the double-turn clamp 22 has a pivot axis 30 which is parallel to the X-axis and which is flanged to the side cheeks 26, 28.
  • the pivoting takes place by means of a pivot drive 32, which is also mounted on the side walls 26, 28.
  • FIGS. 3a, 3b show three-dimensional views of the double reversing vice 22 according to FIG. 2, wherein FIG. 3a corresponds to the position of the double reversing vice 22, as shown in FIG. FIG. 3b shows the double-turn clamp 22 in a somewhat different viewing direction, so that the left-hand part becomes visible in these figures.
  • the double-turn clamp 22 has an approximately drum-shaped construction with two end-side drum walls 34, 36 which are connected by an axle 38 forming the pivot axis 30, which also extends through the drum walls 34, 36 therethrough.
  • a respective axle bearing 40, 42 is arranged, which, as shown in Figure 2, is flanged to the two side cheeks 26, 28 of the machine frame 6.
  • each workpiece carrier 44, 46 is mounted, which are each pivotable about a rotary axis A.
  • each workpiece carrier 44, 46 has a bridge 48, 50 (see also Figure 6), on the two round tables 52, 54; 56, 58 are mounted, on each of which a workpiece to be machined is stretched.
  • the rotary tables 52, 54; 56, 58 are each pivotable about a B-axis.
  • extending between the two drum walls 34, 36 still two mitschwenkende partitions 60, of which in the illustration of Figure 2, only one is visible. By these partitions 60, the working space 18 is separated from the loading / loading space 20.
  • the workpiece carrier 44 is in the swivel position of the double-turn vice 22 shown in FIGS. 1 and 2 in the loading space 20 and can then be loaded with the workpiece blanks by a robot or by an operator.
  • the already loaded with workpieces workpiece carrier 46 is located in the working space 18, wherein the workpieces in the illustrated reference position, i. in the pivotal position of the bridge 50 upside down, i. are arranged extending from the two round tables 56, 58 downwards (view of Figure 3a).
  • each bridge 48, 50 which will be explained in more detail below, are each rotatably mounted in the drum walls 34, 36 via suitable bridge bearings.
  • Each bridge 48, 50 extends with a coupling head 62, 64; 66, 68 through the respective drum wall 34, 36 and thus projects axially parallel out of the respective end faces of the drum walls 34, 36 out.
  • each coupling head 62, 64, 66, 68 has in each case a coupling surface 70 which extends approximately transversely or tangentially or diagonally to the respective A-axis and, for example, two docking or coupling receptacles 72, 74 has a zero point clamping system.
  • Such zero-point clamping systems are known from the prior art and have, for example, a clamping bolt with a conical centering, which is inserted into a coupling receptacle 72, 74, in the
  • Cocking slide hydraulically, pneumatically or by electric motor or in any other way are actuated to tension the clamping bolt backlash.
  • Coupling receptacle 72, 74 in approximately along a diagonal, balcony-like
  • coupling surface 70 of the respective coupling heads 62, 64, 66, 68 are arranged.
  • the clamping bolts of the zero-point clamping system are then arranged on the machine frame side corresponding to the gantry drive described below.
  • Such zero point clamping systems are designed with regard to the highest possible rigidity.
  • the thus configured coupling heads 62, 64, 66, 68 thus form part of an interface to a gantry drive, which according to the invention is not - as in conventional solutions - integrated into the double-turn clamp 22 but is mounted on the machine frame side.
  • the two side cheeks 26, 28 are each provided with a receptacle 75, of which only one in Figure 2 is visible.
  • each of these shots 75 a workpiece carrier drive of the A-axis is stored.
  • the figure 4 which shows a further individual representation of the double reversing vice 22
  • one of the workpiece carrier drives is provided with the reference numeral 76.
  • a spindle 77 of each workpiece carrier drive 76 carries a coupling piece 78 with two coupling elements 80, 82 designed as clamping bolts, which are used for coupling / connecting the interface in FIG.
  • Coupling head 62 can be brought. As stated above, the
  • Clutch elements 80, 82 designed as a clamping bolt, which is a precise
  • Round-shaped trained workpiece carrier drive 76 formed coupling piece 78 is formed according to the coupling surface 70 and thus extends in the diagonal / tangential to a spindle 77 of the workpiece carrier drive 76 and can be used for clamping with respect to the respective coupling surface 70 of
  • Coupling head 62, 64, 66, 68 bring into the relative position shown on the right in Figure 4, in which the coupling surface 70 and a clutch surface 79 of
  • Coupling piece 78 parallel to each other, so that the coupling head 62, 64, 66, 68 with the associated coupling piece 78 of the spindle of
  • Workpiece carrier drive 76 to complement a coupling block, wherein the adhesion via the zero point clamping system with the in the coupling receptacles 72, 74
  • clamping elements such as clamping cones can be used instead of the zero point clamping system.
  • the workpiece carrier 46 with the coupling heads 66, 68 is in operative engagement with the machine frame side
  • Workpiece carrier 44 are brought into the coupling position shown in Figure 4 at the top right, must according to the zero point clamping systems on
  • Workpiece carrier 46 are released / opened, so that the coupling elements out of engagement with the coupling receivers 72, 74 reach. After this opening is then pivoted about the pivot drive 32 of the double reversing clamp 22 by about 180 °, so that the coupling heads 62, 64 are brought into the relative position shown on the right in Figure 4 with respect to the workpiece carrier drives 76.
  • the workpiece carrier 46 see three-dimensional view in Figure 4
  • the coupling surfaces 70 of the coupling heads are then on corresponding coupling surfaces 79 of the coupling pieces 78 (see Figure 4, shown here for clarity with a parallel spacing).
  • the frame-supported workpiece carrier drive 76 can be connected in a rotationally fixed manner to the workpiece carrier 44 or 46 located in the working space via this interface in order to rotate it around its A-axis.
  • This gantry drive with the workpiece carrier drives 76 arranged on both sides in the manner of a rotary table is designed to be extremely rigid, since the force flow from the
  • FIGS. 5a, 5b The drive of this drum-type carrier via the pivot drive 32, which is also designed as a gantry drive.
  • the basic principle of this pivoting drive 32 is shown in FIGS. 5a, 5b, wherein FIG. 5a shows a side view of the double-turn vice 22 from the left (illustrations according to FIGS. 2, 3 and 4) and FIG. 5b shows a front view from the loading space 20.
  • the pivot drive 32 is in the form of a chain drive
  • Gantrybauweise executed, wherein in each case a drive chain 86, 88 wraps around the comparatively large diameter of the drum wall 34, 36.
  • Each of the drive chains 86, 88 is driven by a drive pinion 90, 92, which are arranged on a common drive shaft 94.
  • This drive shaft 94 is driven by a pivot motor 96.
  • the bearing of the drive shaft 94 with the pivot motor 96 takes place on both sides via bearing brackets 98, 100, which are flanged according to FIG 2 frontally on the side walls 26, 28 of the machine frame 6.
  • the drive shaft 94 and the axle body 38 of the pivot axis and the A-axes of the workpiece carrier 44, 46 thus extend parallel to each other.
  • the two drive chains 86, 88 are not designed as endless chains but with their free end portions 102, 104; 106, 108 connected to the peripheral edge of the drum wall 34, 36, so that the drum walls 34, 36 need not be designed with an external toothing. Accordingly, the pivoting of the double reversing vice 22 is not rotationally revolving but in an input and return pivoting movement by 180 °.
  • the coupling and uncoupling movement takes place only with an approximately tangential component of movement, which is caused by pivoting the double-pivot clamp 22 about its pivot axis and thereby the workpiece carrier, for example the workpiece carrier 44, located in a basic position
  • Loading space 20 is pivoted out into its working position in the working space 18, wherein the coupling heads 62, 64 arranged on both sides then come into coincidence with the coupling elements 80, 82 of the frame-fixed, executed in gantry design workpiece carrier drive 76, so that then on the machine control, the rotationally fixed coupling can be effected by engaging the coupling elements 80, 82 in the coupling recesses 72, 74.
  • each workpiece holder 44, 46 pivotable about the A-axis is associated with an indexing device 103, 105 and other measuring systems, via which during the processing and when swiveling in and docking (closing the interface), the rotational positions of the workpiece carriers 44, 46 can be monitored.
  • the energy supply of the workpiece carrier 44, 46 and also mounted thereon round tables 52, 54, 56, 58 respectively via energy chains 85 In principle, however, a fluidic power supply via rotary joints and the like can be realized.
  • FIG. 6 shows an individual representation of the workpiece carriers, the workpiece carrier 44 being explained by way of example.
  • This has the aforementioned bridge 48, in which the two rotary tables 52, 54 are potted.
  • the energy supply in the described embodiment takes place via energy chains 85, via which the two rotary tables 52, 54 are supplied with electrical energy and pressure medium for clamping.
  • the structure of the rotary tables 52, 54 will be explained in more detail below.
  • the bridge 48 has a box-shaped construction, wherein the electrical system and the fluid connections are guided inside the box-like bridge housing. Laterally on the bridge 48 bridge cheeks 107, 109 are provided, which extend perpendicular to the A axis. The bridge cheeks 109, 109 are rounded upwards (view according to FIG.
  • This drive is designed in the manner of a rotary table and has a cup-shaped rotary axle housing 1 18, which in one of the side cheeks 26, 28 of the ma- schinengestive 6 provided receptacles 75 is fastened by means of a rotary axis flange.
  • this rotary axle housing 1 18 is about a spindle bearing 120 a rotatable about the axis A central part mounted, which is referred to below spindle 122.
  • the respective coupling piece 78 is then attached, via which the rotationally fixed connection with the coupling head 62, 64 is made on the pivotable about the A-axis workpiece carrier 44, 46.
  • the drive of the spindle 122 in the illustrated embodiment via an engine / transmission unit with an indicated motor 126 and a gear 128, which may be formed, for example, as a gear transmission, Cyclogetriebe, worm gear or the like.
  • the cup-shaped rotary axle housing 1 18 and the correspondingly formed spindle 122 together with the spindle bearing 120 are designed so that instead of the motor gear unit 126, 128, another drive, for example a Torqueantrieb 130 can be used without significant structural changes to the rotary axle housing 1 18, the spindle bearing 120 and the spindle 122 must be made.
  • the spindle bearing 120 is designed so that it engages around the respective drive. This modular concept is also used in the described embodiment of a machine tool 1, since, according to FIGS.
  • the rotary tables 52, 54 rotatable about the rotary axis B are designed in accordance with the workpiece carrier drives 76. That is to say the essential difference between the rotary tables 52, 54 according to FIGS. 8a, 8b and the tool carrier drives 76 according to FIGS. 7a, 7b essentially consists of the type of drive. As explained, a motor / gear unit is used in the workpiece carrier drive 76, while at the rotary tables 52, 54 a Torqueantrieb 130 is used. This means that the drives are modular and can be retrofitted without any design changes with relatively little effort to change the drive concepts.
  • a rotary axle housing 132 of the rotary tables 52, 54 corresponds to the construction of the rotary axle housing 1 18 of the workpiece carrier drive 76.
  • a spindle 136 guided in the rotary axle housing 132 via a spindle bearing 134 corresponds to the components (spindle bearing, spindle) indicated by reference numbers 120, 122. in FIGS. 7a, 7b.
  • a plane surface 135 of the spindle 136 with a different hole pattern as the flat surface 124 of the Werk Swissismeant ebes 76 is executed. This hole pattern is adapted to the clamping means for clamping the workpiece to be machined.
  • the energy supply (fluid, electrical) preferably takes place via the said energy chains 85 of the double-turn clamp 22.
  • a gantry drive is used to drive the double reversing vice 22 (changing device), which is designed there as a traction drive.
  • FIG. 9 shows a basic concept in which the
  • Swivel drive 32 is designed as a hollow shaft gear.
  • the swivel motor 96 drives a hollow shaft 138 directly or via a gear 137, which is non-rotatably connected to a drive shaft through which practically the axle body 38 (pivot axis 30) is formed.
  • This drive shaft 140 passes through the drum-like carrier of the double reversing vice 22 with its drum walls 34, 36 and then drives the side of the double reversing vice 22, which is spaced apart from the pivot motor 96, via an intermediate transmission 142.
  • a gantry drive is also provided by this hollow shaft gear, via which the torque is introduced into the drum walls 34, 36 on both sides.
  • the machining accuracy can be increased when the gear is biased.
  • FIG. 10 shows a first possibility of such a bias voltage. Shown is an example of the workpiece carrier 44 with its bridge 48, in which the rotary tables 52, 54 are mounted. As explained, the rotary axis A is driven by means of the workpiece carrier drives 76, 76 'which are held laterally in the machine frame 6 and which are connected to the bridge 48 via the interfaces described above. Also indicated in FIG. 10 are the two indexing devices 102, 104 and measuring systems associated with the drives 76, 76 '. The bias can now be applied by the bridge 48 in a clamped state, ie with a predetermined Twist, being worked on.
  • This distortion is then compensated for and regulated by suitably controlling the workpiece carrier drives 76, 76 'by applying the bridge 48 with torques M1, M2.
  • this balancing torque may be about 10% of the drive torque during machining.
  • the actuation of the drives 76, 76 'then takes place as a function of the measuring signals of the measuring system 102, 104 or the indexing, so that in the case of a measuring system 102, 104 which is adjusted to zero, the bridge is acted upon by a prestressing moment which is sufficient for the distortion compensate - the bridge is then just regulated and braced both gears of the workpiece carrier drives 76.
  • a voltage is not required in a Torqueantrieb.
  • the drives of the rotary tables 52, 54 can be clamped.
  • the spindle 136 can be designed as a ring gear, which meshes with two pinions of two geared motors, which then apply correspondingly a mutually directed torque M1, M2 and thus clamp the drive.
  • the bias of the workpiece carrier 44, 46 or more precisely its bridge 48, 50 can also be done via torsion bars or stabilizers over which the bridge 48, 50 can be acted upon subsequently with a torque.
  • the workpiece carriers 44, 46 and also the work spindles are subjected to a high thermal load with their sleeves, which may lead to dimensional changes if a critical temperature difference to the machine frame 6 occurs.
  • FIG. 11 shows a basic concept by means of which dimensional changes in the region of the workpiece carrier 44, 46 in the X-direction can be absorbed.
  • the distance a of the rotary tables 52, 54 mounted on the workpiece carrier 44, 46 changes, so that the relative position to the two working spindles 2, 4 also changes.
  • a temperature sensor 143 can be arranged in the workpiece carrier 44, via which the temperature of the workpiece carrier 44, 46 and thus its dimensional change in the X direction can be detected.
  • a temperature difference with respect to the temperature of the entire structure can be detected via the temperature sensor 143.
  • the dimensional change is then controlled via the machine control.
  • the rotary table 54 - be displaced in the X direction to compensate for this dimensional change.
  • the X-compensation of the rotary table 54 can not be bolted to the bridge 48 but be slidably mounted in the X direction. This can be done, for example, that this round table 54 is slidably mounted on a flange plate 148 via a clamp 144, 146. By loosening the clamp 144, 146, the rotary table 54 can then be adjusted in the X direction.
  • the guide of the rotary table 54 on the flange plate 148 can be done for example with a sliding or rolling bearings.
  • the clamping 144, 146 may be performed hydraulically, which may be provided, for example by Druckstoffbeetzstofftechnikung.ölbbare or engageable in operative clamping elements that clamp the rotary table 54 with the flange plate 148.
  • the displacement can be done for example by docking the associated work spindle 2, 4.
  • a corresponding HSK cone can be provided on the rotary table 54, to which the work spindle 2, 4 docks. By their adjustment in the X direction, the X compensation can then take place.
  • a wedge gear can be provided to avoid excessive loading of the spindle, so that the force of the spindle is transmitted via a wedge on the rotary table 54.
  • This pivoting can, for example, be made possible by the fact that the two linear motors 10, 12 designed as gantry drive are controlled in such a way that the carriage 152 is slightly tilted about the C rotary axis, so that the height offset of the work spindles 2, 4 is compensated.
  • This tilting of the carriage 152 for example, by a flexible configuration of the carriage-side
  • Bearing elements allows, which are guided on the Y-guide of the frame 8.
  • guide elements 154, 156 are provided, while intermediate lying rigid bearing elements 158 are provided, the one
  • Solid joint 160 is provided which allows the tilting of the carriage 152.
  • the stiffness in the X direction is effected by the bearing elements 158, 158 ' .
  • the Y-axis is compensated by the linear drives and the stiffness in the Z direction by all bearing elements 154, 156, 158 effected.
  • two compliant bearing elements 154, 156, 158 are compliant.
  • Guide elements can also each only a resilient guide element 154, 154 ' and a rigid guide member 158, 158 ' are used.
  • the interfaces of the double reversing vice 22 to the machine frame 6 and the machine structure may be designed so that the double reversing clamp 22 is removable and the
  • Machine tool 1 then constructed without changing the machine frame 6 with or without double reversing vice or the double reversing clamp can be retrofitted in a simple manner. In this way, the flexibility of the machine tool 1 is further improved.
  • the Applicant reserves the right to design the Interfaces of Doppel Listespanners 22 in general form to make their own claim.
  • a machine tool with a double-turn clamp which has two workpiece carriers whose workpiece carrier drive is arranged on the frame side.
  • a coupling of the workpiece carrier drive to the workpiece carrier takes place with only one component of movement, which preferably runs in the tangential direction.

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

Abstract

L'invention concerne une machine-outil munie d'un dispositif de changement de pièces et d'au moins une broche d'outil ou de travail (2, 4) déplaçable le long de guides linéaires, fixée sur un bâti machine (6), le dispositif de changement comportant deux porte-pièces (44, 46) pouvant pivoter au moyen d'un entraînement pivotant (32) autour d'un axe de pivotement (30) afin de faire pivoter un porte-pièce (44, 46) d'un espace de travail (18) vers un espace de chargement (20) ou faire pivoter un porte-pièce (44, 46) de l'espace de chargement (20) vers l'espace de travail (18), les porte-pièces (44, 46) pouvant pivoter respectivement autour d'un axe circulaire (A) au moyen d'un entraînement de porte-pièces (76, 76'). L'invention est caractérisée en ce que l'entraînement de porte-pièces (76, 76') est logé côté espace de travail sur le bâti machine (6) et peut être relié de façon solidaire en rotation, au moyen d'une interface, au porte-pièce (44, 46) disposé respectivement côté espace de travail.
PCT/EP2017/070878 2016-08-19 2017-08-17 Machine-outil Ceased WO2018033605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016115447.4 2016-08-19
DE102016115447.4A DE102016115447A1 (de) 2016-08-19 2016-08-19 Werkzeugmaschine

Publications (1)

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WO2018033605A1 true WO2018033605A1 (fr) 2018-02-22

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WO (1) WO2018033605A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110757180A (zh) * 2019-11-26 2020-02-07 江门杰能刀剪装备科技有限公司 一种工作台
CN114102206A (zh) * 2021-12-30 2022-03-01 西安沅泓机床科技有限公司 一种夹具快速交换装置
CN115156979A (zh) * 2022-08-16 2022-10-11 安庆中船动力配套有限公司 一种气缸盖生产用自动翻转装置
CN117300218A (zh) * 2023-11-21 2023-12-29 秦皇岛广厦重型装备有限公司 一种数控加工中心用数控龙门铣床

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DE102019213871B4 (de) 2019-09-11 2022-08-18 bavius technologie gmbh Vorrichtung zum schwenken, wenden und wechseln von werkstück-paletten an einem horizontal-bearbeitungszentrum, sowie palettenträger
ES2984069T3 (es) * 2020-07-24 2024-10-28 Fill Gmbh Máquina herramienta y procedimiento para operar la máquina herramienta
EP4588611A1 (fr) * 2024-01-20 2025-07-23 Schwäbische Werkzeugmaschinen GmbH Machine-outil
EP4588612A1 (fr) * 2024-01-20 2025-07-23 Schwäbische Werkzeugmaschinen GmbH Machine-outil
AT527082A3 (de) * 2024-06-14 2025-10-15 Fill Gmbh Werkzeugmaschine, sowie ein Verfahren zum Betreiben der Werkzeugmaschine

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DE3505138A1 (de) * 1984-02-14 1985-11-07 Szerszámgépipari Müvek, Budapest Mehrfach-bearbeitungsmaschine mit werkzeug- und werkstueckwechseleinrichtung
EP0712682A2 (fr) * 1994-11-19 1996-05-22 Maschinenfabrik Berthold Hermle Aktiengesellschaft Machine-outil, en particulier perceuse-fraiseuse
DE19936502C1 (de) * 1999-08-05 2001-02-15 Bernhard Magerl Vorrichtung und Verfahren zur schwenkbaren Werkstückzuführung in den Arbeitsbereich einer Werkzeugmaschine
DE19959072A1 (de) * 1999-12-08 2001-06-13 Ernst Mendrok Werkzeugmaschine mit schwenkbaren Werkstückträgern

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DE3505138A1 (de) * 1984-02-14 1985-11-07 Szerszámgépipari Müvek, Budapest Mehrfach-bearbeitungsmaschine mit werkzeug- und werkstueckwechseleinrichtung
EP0712682A2 (fr) * 1994-11-19 1996-05-22 Maschinenfabrik Berthold Hermle Aktiengesellschaft Machine-outil, en particulier perceuse-fraiseuse
DE19936502C1 (de) * 1999-08-05 2001-02-15 Bernhard Magerl Vorrichtung und Verfahren zur schwenkbaren Werkstückzuführung in den Arbeitsbereich einer Werkzeugmaschine
DE19959072A1 (de) * 1999-12-08 2001-06-13 Ernst Mendrok Werkzeugmaschine mit schwenkbaren Werkstückträgern

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110757180A (zh) * 2019-11-26 2020-02-07 江门杰能刀剪装备科技有限公司 一种工作台
CN114102206A (zh) * 2021-12-30 2022-03-01 西安沅泓机床科技有限公司 一种夹具快速交换装置
CN115156979A (zh) * 2022-08-16 2022-10-11 安庆中船动力配套有限公司 一种气缸盖生产用自动翻转装置
CN115156979B (zh) * 2022-08-16 2023-09-01 安庆中船动力配套有限公司 一种气缸盖生产用自动翻转装置
CN117300218A (zh) * 2023-11-21 2023-12-29 秦皇岛广厦重型装备有限公司 一种数控加工中心用数控龙门铣床
CN117300218B (zh) * 2023-11-21 2025-10-24 秦皇岛广厦重型装备有限公司 一种数控加工中心用数控龙门铣床

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