Source: https://patents.google.com/patent/EP1882544A1/en
Timestamp: 2020-04-02 17:07:47
Document Index: 651747913

Matched Legal Cases: ['arts 6', 'arts 6', 'arts 14', 'arts 14', 'art 20', 'arts 27', 'art 27', 'arts 6', 'arts 37', 'arts 82', 'arts 82', 'arts 37', 'arts 53', 'art 82', 'art 37']

EP1882544A1 - Milling and drilling machine - Google Patents
Milling and drilling machine Download PDF
EP1882544A1
EP1882544A1 EP07013115A EP07013115A EP1882544A1 EP 1882544 A1 EP1882544 A1 EP 1882544A1 EP 07013115 A EP07013115 A EP 07013115A EP 07013115 A EP07013115 A EP 07013115A EP 1882544 A1 EP1882544 A1 EP 1882544A1
EP07013115A
EP1882544B1 (en
Ines Prautzsch
2006-07-24 Priority to DE102006034123A priority Critical patent/DE102006034123B4/en
2007-07-04 Application filed by Deckel Maho Seebach GmbH filed Critical Deckel Maho Seebach GmbH
2008-01-30 Publication of EP1882544A1 publication Critical patent/EP1882544A1/en
2008-10-01 Publication of EP1882544B1 publication Critical patent/EP1882544B1/en
B23Q2220/004—Rotary tables
Y10T409/305768—Milling including means to infeed work to cutter with work holder including means to support work for rotation during operation with linear movement of work
The invention relates to a milling and drilling machine consisting of a dimensionally stable machine stand (1) with an upper crosshead (5), in at least two coordinate axes on the front side of the crosshead (5) motor-driven machining unit (23) having a rotary-driven work spindle with having replaceable tools, and a front of the machine frame (1) arranged and in at least one coordinate axis motorized horizontally movable workpiece table (55) with a table top for clamping at least one workpiece. In the case of the machine tool according to the invention, the machine stand (1) has two dimensionally stable side walls (2, 3) which are rigidly interconnected by the upper cross member (5) and by a stem (8).
The invention relates to a milling and drilling machine with a dimensionally stable machine frame having two parallel side walls and an upper cross member which is mounted on the two side walls, with a motorized in at least two coordinate axes X, Z machining unit having a rotary-driven work spindle contains replaceable tools, and with a stem, which has two transversely spaced horizontal guide rails on which a workpiece table assembly with a table top for mounting a workpiece in a horizontal Y-coordinate axis is arranged to be moved by a motor.
Such milling and drilling machines are designed for multi-axis machining of workpieces in a single clamping and have the significant advantage that in addition to extremely high accuracy requirements and high chip rates can be achieved with reasonable design and control engineering effort.
From the DE 10 2004 034 873 B a generic drilling and milling machine is known, which has a machine frame with a base-like base and two dimensionally stable side walls. The two side walls are connected by an upper crossbar to a one-piece portal. On the sloping front surface of the traverse a carriage is movable in horizontal guide rails, at the vertical end face of a processing unit with a work spindle is guided by a motor. The workpiece table can be moved on horizontal guide rails of a stem in a horizontal coordinate axis to below the traverse.
From the DE 102 59 215 A1 a drilling and milling machine is known which has a machine bed and two wall-like side stand. On the top of the two wall-like side stand a frame-like slide in the YX-axis is arranged movable by motor, at the vertical end side of a machining unit in the X and Z axes is guided by a motor. Between the two wall-like side posts a workpiece table assembly is arranged, which has a rotatable about a horizontal axis bridge. On the opposite to the axis of rotation transversely offset center web of the bridge, a flat table top is provided with clamping means for workpiece mounting.
The object of the invention is to provide a milling and drilling machine that allows multi-faceted work with high positioning accuracy and high acceleration values in a particularly advantageous chip fall.
This object is achieved by the features specified in claim 1.
A particular advantage of the milling and drilling machine according to the invention is that the workpiece table assembly can be moved on the horizontal transversely spaced guide rails of the base-like base in the Y-coordinate axis to below the cross member of the portal-like machine frame. Since there is a free space in the base-like base between the two side walls, a particularly advantageous chip fall results. Due to the base-like base with the side walls, the upper cross member and the front side Stem results in a monoblock-like structure that meets the highest stiffness requirements.
In order to effectively work on a workpiece as varied as possible with the necessary accuracies, in the machine according to the invention, the stand on a base-like base with two dimensionally stable side walls, which are rigidly interconnected by an upper crosshead and an end face stem. A slide which can be moved on the crosshead in horizontal guides carries on front-side vertical guides the machining unit designed as a milling head, which is motor-driven in the vertical plane and has at least one interchangeable tool.
A particular advantage of this machine design is that the workpiece table can be moved on horizontal guides of the base-like base in a coordinate axis to below the crosshead of about portal-like stand. Since there is a free space in the base-like base between the two side walls, a particularly advantageous chip fall results. Due to the base-like base with the side walls, the upper crosshead and the front stem, the result is a monoblock-like overall structure that meets the highest rigidity requirements.
To obtain the desired high positioning accuracy and sensitive sensitive high accelerations electric linear motors are used for driving the cross slide and the processing unit expediently as drive units, the secondary part is arranged in each case between the guide rails provided in pairs. The primary parts of these electric linear motors are located on the respective moving machine part.
According to an advantageous embodiment of the invention are on the base-like base inside next to the two side walls of the machine frame horizontal guide rails provided, which extend to the stem and serve the support of the motor-driven workpiece table assembly. According to the invention, this workpiece table assembly includes two electrically synchronized linear motors whose secondary parts are mounted on the inner sides of the two side walls and their primary parts vertically to components of the table assembly.
Good visibility and accessibility to the working space is achieved in that the two side walls have a frontal step, wherein the stem has the same height as the front end portions of the two side walls and has a front transverse wall which is rigidly connected to the front end portions of the two side walls is. In this way, a free space is limited by the stem and the side walls, in which a chip collector can be arranged.
For the milling and drilling machine according to the invention, a work table arrangement is particularly suitable, which includes a pivotable about a horizontal axis of rotation bridge, on whose opposite the axis of rotation transversely offset center web a flat table top is arranged with clamping means for workpiece fixation. The both sides of the bridge at the middle vertical leg of the bearing are rotatably mounted in a respective carriage, wherein the two bearing the bridge carriage guide shoes and drive units for synchronous movements of both carriages and other drive units for the pivotal movements of the bridge.
Conveniently, electrically synchronized torque motors are provided in the carriages as pivot drives for the bridge and electrically synchronized linear motors for the movements of the two carriages. The plane in the middle bridge of the bridge mounted flat tabletop is expediently driven in rotation by a positioned in the bridge torque motor. The used torque motors can generate high torques even at relatively low speeds and give high positioning accuracy of the driven components.
In the following, embodiments of the invention will be described in detail with reference to the drawing. Show it:
a milling and drilling machine according to the invention in a perspective overall view;
the milling and drilling machine of Figure 1 in a partially sectioned front view.
the milling and drilling machine of Figure 1 in a partially sectioned side view.
a workpiece table assembly for the embodiment shown in Figures 1 to 3 in a perspective view.
the workpiece table assembly of FIG. 4 in vertical section.
The milling and drilling machine shown in Figures 1 to 3 includes a highly rigid machine frame 1, the two parallel side walls 2, 3, a front-side stem 4 and an upper cross member 5, which on the rear upper parts 6, 7 of the two side walls. 2 , 3 is attached. The side walls 2, 3 and the front transverse wall 8 having stem 4 are suitably carried out in monoblock construction. As can be seen in particular from FIGS. 1 and 3, the cross member 5 has an approximately trapezoidal downwardly widening cross section with a vertical front side and an inclined rear wall. The wider underside of the cross member 5 is permanently attached to the horizontal upper side of the upper rear parts 6, 7 of the two side walls 2, 3. On its front side, the cross member 5 has an upper and a lower beam-like projection 9, 10, on each of which a guide rail 11, 12 is attached. In the recessed middle section 13 of the cross member, the plate-shaped secondary parts 14 of a linear electric motor are mounted in a row next to each other.
At the two front guide rails 11, 12 of the cross member 5, a support carriage 16 in guide shoes 17, 18 is guided horizontally movable, on the back of a co-operating with the secondary parts 14 primary part 20 of the electric linear motor is mounted. On the front side of the support carriage 16, two parallel vertical guide rails 21, 22 are fastened, on which a headstock 23 is guided vertically displaceably via pairs of guide shoes 24, 25 arranged. The headstock and the spindle housing 23 includes a work spindle 26 which is directly driven by a built-in electric motor. As drive for the existing of the headstock 23 and the work spindle 26 processing unit is an electric linear motor, the plate-shaped secondary parts 27 are mounted on the front side of the carriage 16 between the two guide rails 21, 22. The co-operating with the secondary part 27 primary part of the electric linear motor for the vertical travel movements of the headstock 23 is located at the back of a support structure 29 of the headstock 23rd
As can be seen in FIGS. 2 and 3, electrical supply cables 30 and cooling liquid lines 31 are provided for the electric linear motors. As can be seen from FIG. 1, the two side walls 2, 3 have, in their central region, a step 35, 36 between the two rear upper parts 6, 7 and the stem 4. In the side walls 2, 3 in the region of these stages 35, 36, the plate-shaped stationary secondary parts 37, 38 are mounted by linear electric motors, as shown in Fig. 1, left part, and Fig. 3 can be seen.
The front lower end portions 39, 40 of the side walls 2, 3 have approximately the same height as the front transverse wall 8 of the stem 4 and limit via inclined surfaces 41 a space 42, which is used as a chip collector.
As can be seen from Fig. 1, extending on the stem 4 beam-shaped supports 43, 44 on the inside of the two side walls 2, 3. On each support 43, 44, a guide rail 45, 46 is mounted, extending to the rear end of the machine frame 1 extend (see Fig. 3).
On the two guide rails 45, 46 a table assembly 50 is movably guided, which has in the illustrated embodiment, a central support member and two lateral primary parts 82, 83 of linear motors. These two primary parts 82, 83 cooperate with the stationary secondary parts 37, 38 in the side walls 2, 3 of the machine frame 1 and cause movements of the table assembly 50 on the stationary guide rails 45, 46. The central support member of the table assembly 50 may be a rotatable or non-rotatable tabletop 55 carry for clamping one or more workpieces.
In the embodiment of the machine tool illustrated in FIGS. 1 to 3, a special workpiece table arrangement 50 is used, which is shown in detail in FIGS. 4 and 5. This table assembly 50 includes a bridge 51, which consists of a dimensionally stable center web 52 and two laterally bent leg portions 53, 54. In the central web 52, a workpiece table 55 is mounted, which - not shown - parallel clamping grooves for fixing one or more workpieces on its surface. The workpiece table 55 is rotationally driven by a torque motor 56, 57, whose stator 56 provided with cooling channels is fastened in a cylindrical recess in the central web 52. The rotor 57 of the torque motor is a so-called. Internal rotor and is fixedly connected via a flange with a hollow bearing pin 58. For detecting the workpiece table in predetermined rotational positions is a clamping bush 59 which engages the lateral surface of the bearing pin 58 when its elongated narrow annular chamber is subjected to a pressure medium. For tilt-free support of the workpiece table 55 are stable annular axial / radial bearings 60, which give the workpiece table 55 a high load capacity and ease. The torque motor can generate high torques and also high rotational speeds, so that even larger workpieces can be machined with high precision by milling and also by turning in one clamping. In the illustrated embodiment, the laterally bent up to the vertical leg portions 53, 54 are double-walled and formed integrally with the support cylinder 61 for the torque motor 56, 57. As shown in Fig. 5, the support cylinder 61 surrounds the hollow cylindrical stator 56 provided with spiral grooves on its outer peripheral surface. The spiral grooves in the stator 56 form cooling passages which are acted upon by a cooling medium in a known manner. The hollow cylindrical stator 56 is supported with its upper end face on an annular shoulder 62, which is formed or formed directly below the annular axial / radial bearing 60 on the support cylinder 61. By this arrangement, the loads exerted on the bearing 60 are introduced directly into the stable support cylinder 61. The support cylinder 61 and the stator 56 are closed down together with other components by a lid 63 which is integrally molded and has a sleeve 56 coaxial with the stator and a radial flange formed thereon.
In the table arrangement 50 according to FIGS. 4, 5, a hollow support bearing journal 64, 65 is fastened to each of the two limb parts 53, 54, whose central axes coincide and form a common pivot axis for the bridge 52 and the workpiece table. This pivot axis extends at a predetermined distance to the surface of the workpiece table 55. On each support journal 64, 65 sits a clamping bush 66, 67, each one radially inward by a pressure fluid deformable wall for clamping the support bearing journal 64 and 65, respectively. Each clamping bush 66, 67 is secured in a sleeve which is part of a circular cover 68, 69.
Each support journal 64, 65 is driven by a respective torque motor, both of which are preferably synchronized with each other electrically. Each torque motor has an outer circulating cooling channels provided with stator 70, 71 which is mounted in a cylindrical recess of a housing of a carriage 80, 81 and the end face of the disc-shaped part of the lid 68, 69 is held. With the respective stator 70, 71 depending acts a rotor 72, 73 as an inner rotor together. Each rotor 72, 73 is fixedly connected via suitable fastening means with the associated leg 53 or 54 of the table assembly 50 and provides for electrical excitation of the two synchronized torque motors 70, 72 and 71, 73 for the pivoting movements of the workpiece table in desired angular positions before or also during a workpiece machining. In the illustrated embodiment, each annular rotor 72, 73 is shorter than the respective associated stator 70, 71 and fixed with its axially inner end face to an inner radial flange of the support journal 64, 65.
The above-described bearings of the table assembly 50 are accommodated in a housing each of a carriage 80, 81. At the rear part of each carriage 80, 81 a movable primary part 82, 83 of a linear electric motor is provided. The stationary secondary part 37, 38 of the electric linear motors is located on the inside of the respective side wall 2, 3 of the machine frame 1, as can be seen from Figures 1 and 3. On its underside, each carriage 80, 81 guide shoes 84, 85, which cooperate with the guide rails 45, 46 shown in FIG.
The invention is not limited to the illustrated and described embodiments. Thus, in the inventive Milling and drilling machine and other table arrangements are used. Appropriately, these constructions should have sled-like structure in which an optionally rigid table construction is attached. This sled-like structure should have on an outer side wall, the functional part of an electric linear motor whose other functional part is fixed to the inside of the side wall of the machine stand.
Milling and drilling machine with
- a dimensionally stable machine frame (1) having two parallel side walls (2, 3) and an upper cross member (5) fixed on the two side walls (2, 3),
a machining unit (23) which can be moved by motor in at least two coordinate axes and which contains a rotationally driven work spindle (26) with interchangeable tools, and
a stanchion (4) arranged in front of the machine frame (1), on the two transversely spaced horizontal guide rails of which a workpiece table arrangement (50) with a tabletop for mounting a workpiece in a horizontal Y coordinate axis is arranged such that it can be moved by a motor;
- In addition to the inner sides of the two side walls (2, 3) of the machine frame (1) stationary elongate supports (43, 44) are provided, on which guide rails (45, 46) for the workpiece table assembly (50) are attached and
- The drive for the movement of the workpiece-table assembly (50) in the Y-coordinate axis has two electrically synchronized linear motors whose secondary parts (37, 38) on the inner sides of the two side walls (2, 3) of the machine frame (1) are attached and whose primary parts (82, 83) are mounted vertically on structural bodies (80, 81) of the workpiece table arrangement (50).
Milling and drilling machine according to claim 1,
on the cross member (5) in horizontal guides a carriage (16) is movable, which carries on front side vertical rails (21, 22) designed as a milling head processing unit (23).
Milling and drilling machine according to claim 1 or 2,
the drive units for the horizontal slide (16) and the processing unit (23) are electric linear motors whose secondary part is arranged in each case between the guide rails provided in pairs.
Milling and drilling machine according to one of the preceding claims,
the workpiece table (55) on two horizontal guide rails (45, 46) is movable, which are provided on the stem (8) and on a socket-like base inside the side walls (2, 3) of the machine stand (1).
Milling and drilling machine according to claim 4,
the drive for the workpiece table (55) has two electrically synchronized linear motors whose secondary parts (37, 38) on the insides of the two stator side walls (2, 3) and their primary parts are vertically mounted on building structures of the table construction.
Milling and drilling machine according to claim 5,
the two side walls (2, 3) of the machine stand (1) each have a front-side gradation (35, 36).
in the front of the (8) and the side walls (2, 3) limited space (42) is arranged a chip collector.
the stem (4) has a front transverse wall (8) which is rigidly connected to the two side walls (2, 3) of the machine stand (1) and has the same height as the front end parts of the two side walls (2, 3).
Workpiece table arrangement for a milling and drilling machine according to the preamble of patent claim 1, with
a bridge (50) which can be moved by a motor via a horizontal axis of rotation, on the stable middle web (51) which is offset transversely with respect to the axis of rotation, a flat tabletop (55) with clamping means for fastening the workpiece,
- The at both ends of the central web (51) adjoining bearing leg (53, 54) of the pivoting bridge (50) in a respective carriage are mounted synchronously synchronous motor and
- The two carriages (80, 81) each have a drive unit (82, 83) and guide shoes (84, 85).
Table arrangement according to claim 9,
in the carriage (80, 81) electrically synchronized torque motors are arranged as part-turn actuators for the bridge (51).
Table arrangement according to claim 9 or 10,
in the carriage (80, 81) fixing devices for fixing the bridge are arranged in selected layers.
Table arrangement according to one of claims 9 to 11,
the legs (53, 54) of the bridge (51) via axial / radial bearings in the carriage (80, 81) are mounted.
Table arrangement according to one of claims 9 to 12,
the flat table top (55) by means of a torque motor (56, 57) rotatably mounted in the central web (51) of the pivoting bridge (50) is mounted.
Table arrangement according to one of claims 9 to 13,
the travel drives of the two carriages (80, 81) are electric linear motors whose primary parts (82, 83) are fixedly connected to the respective slides and whose secondary parts (37, 38) are fastened to the side walls (2, 3) of the machine stand (1) ,
Table arrangement according to claim 14,
the linear motors of the two carriages (80, 81) are electrically synchronized and the carriages are optionally coupled to one another via a pull rod (88).
Table arrangement according to one of claims 9 to 15,
the axis of rotation of the bearing arrangements of the pivoting bridge (50) in the carriage (80, 81) extends approximately in the level of the surface of the table top (55).
Table arrangement according to one of claims 9 to 16,
the torque motors in the carriages (80, 81) and in the center bridge (51) of the bridge are internal rotor motors with cooled outer stators.
Table arrangement according to one of claims 9 to 17,
the middle web (51) of the swivel table with the two end legs (53, 54) and the arcuate transition sections between the central web (21) and the legs is double-walled.
Table arrangement according to one of claims 9 to 18,
on the carriage (80, 81) end extensions are formed, on the vertical outer sides of the secondary parts of the respective associated electric linear motors are attached.
EP07013115A 2006-07-24 2007-07-04 Milling and drilling machine Active EP1882544B1 (en)
DE102006034123A DE102006034123B4 (en) 2006-07-24 2006-07-24 Milling and drilling machine and workpiece table arrangement
EP1882544A1 true EP1882544A1 (en) 2008-01-30
EP1882544B1 EP1882544B1 (en) 2008-10-01
ID=38512458
EP07013115A Active EP1882544B1 (en) 2006-07-24 2007-07-04 Milling and drilling machine
US (2) US7591620B2 (en)
EP (1) EP1882544B1 (en)
JP (1) JP5117783B2 (en)
CN (1) CN101112745B (en)
DE (2) DE102006034123B4 (en)
ES (1) ES2314958T3 (en)
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