CN116175209A - Cradle turntable for five-axis machining center - Google Patents
Cradle turntable for five-axis machining center Download PDFInfo
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- CN116175209A CN116175209A CN202310452451.8A CN202310452451A CN116175209A CN 116175209 A CN116175209 A CN 116175209A CN 202310452451 A CN202310452451 A CN 202310452451A CN 116175209 A CN116175209 A CN 116175209A
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- 238000003754 machining Methods 0.000 abstract description 8
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- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
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- 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
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- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
- B23Q5/56—Preventing backlash
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to a cradle turntable for a five-axis machining center, which comprises a first driving assembly and a second driving assembly, wherein the first driving assembly comprises an A-axis driving piece, an A-axis synchronous belt, two A-axis synchronous belt wheels, two A-axis anti-backlash structural members, and a large gear and a swinging shaft which are arranged between the two A-axis anti-backlash structural members. The A-axis driving piece can drive any A-axis synchronous pulley to rotate, the A-axis synchronous pulley drives another A-axis synchronous pulley to rotate through the A-axis synchronous belt, one end of an A-axis clearance eliminating structural member is fixedly arranged on the A-axis synchronous pulley, the other end of the A-axis clearance eliminating structural member is meshed with an A-axis large gear, the A-axis large gear is fixedly sleeved on a swinging shaft, and the A-axis is provided with a pneumatic clamping device. The driving piece of the swinging shaft is set to be a servo motor with two anti-backlash structural pieces to perform anti-backlash on the large gear, and meanwhile, the A shaft adopts a temperature-controlled servo motor to meet the high torque requirement required by machining.
Description
Technical Field
The invention relates to the technical field of machine tool numerical control machining and manufacturing, in particular to a cradle turntable for a five-axis machining center.
Background
The five-axis numerical control machining center is provided with a machining tool bit. The machining tool bit can move in the X, Y, Z directions, and a cradle turntable for placing a workpiece to be machined is added to the machining center on the basis. The cradle turntable is used for increasing the processing dimension of the processing center, namely, the cradle turntable can swing and rotate a workpiece to be processed, that is, the processing tool bit and the cradle turntable act on the workpiece together to realize five-axis linkage processing, so that the processing of complex curved surfaces can be realized, the promotion effect is realized on aviation, medical treatment and other industries, and the processing efficiency and the processing precision are improved.
In a five-axis numerical control machine tool, an existing cradle turntable comprises an A-axis assembly, a turntable base and a C-axis working round table. The C-axis working round table is coaxially arranged on the top end surface of the turntable base, an A-axis driving piece of the C-axis working round table is arranged in the vertical direction, and the C-axis working round table can horizontally rotate along the C-axis relative to the turntable base so as to drive a workpiece to horizontally rotate; the A-axis driving piece of the A-axis assembly is arranged in the horizontal direction, the A-axis assembly is connected with one end of the turntable base, and the A-axis assembly can drive the turntable base and the C-axis working round table arranged on the turntable base to swing back and forth along the A-axis.
The existing driving of the C-axis working round table generally adopts a torque motor to directly drive the C-axis working round table to horizontally rotate. The A-axis assembly drives the turntable base and the C-axis working round table to form a whole. Therefore, the torque required by the A-axis assembly is far greater than the torque required by the C-axis working round table, but the driving mode of the torque motor has large heat dissipation capacity of the motor, so that the driving of the C-axis can be met, if the torque motor is required to drive the A-axis to swing, the torque motors can be respectively arranged at the two ends of the turntable base, but the torque motors at the two ends are arranged to clamp and position the torque motors at the two ends respectively due to the fact that the clamping mechanisms of the torque motors are specially arranged for swinging, the cost is high, the occupied space is large, and the driving of the current A-axis assembly is generally realized by adopting a mechanical structure of a servo motor driving worm gear. However, the driving mode of the A-axis assembly mainly has heating, mechanical abrasion and gaps, and is difficult to meet the requirements of high-precision processing of workpieces such as aerospace, medical treatment and the like.
Disclosure of Invention
In view of the above-mentioned shortcomings and disadvantages of the prior art, the invention provides a cradle turntable for a five-axis machining center, which solves the problem that the driving mode of an A-axis assembly mainly has the influence of mechanical abrasion and clearance on high-precision machining workpieces such as aerospace, medical treatment and the like.
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
in one aspect, a cradle turntable for a five-axis machining center includes a drive, an a-axis housing, a C-axis table, and a turntable base;
the driving device comprises a first driving component for driving the A shaft to swing and a second driving component for driving the C shaft to rotate, wherein the first driving component comprises an A shaft driving piece, an A shaft synchronous belt, two A shaft synchronous pulleys, two A shaft anti-backlash structural members, a large gear and a swinging shaft, wherein the large gear is arranged between the two A shaft anti-backlash structural members and meshed with the two A shaft anti-backlash structural members at the same time;
the A-axis driving piece can drive any A-axis synchronous pulley to rotate, the A-axis synchronous pulley drives the other A-axis synchronous pulley to rotate through the A-axis synchronous belt, the A-axis synchronous pulley is fixedly provided with one end of the A-axis anti-backlash structural member, the other end of the A-axis anti-backlash structural member is meshed with the A-axis large gear, and the A-axis large gear is fixedly sleeved on the swinging shaft;
the A-axis shell is arranged at one end of the turntable base, one end of the turntable base is connected with the swing shaft of the first driving assembly, the A-axis driving piece is arranged in the A-axis shell, and the A-axis driving piece is positioned between the A-axis synchronous belt and the turntable base;
the C-axis workbench is arranged at the top of the turntable base, the second driving assembly is arranged in the inner cavity of the turntable base, and the second driving assembly can drive the C-axis workbench to rotate relative to the turntable base.
Optionally, each of the a-axis anti-backlash structures comprises a transmission rod and a pinion connected to the transmission rod.
Optionally, the second driving component includes a C-axis driving component, a C-axis synchronous belt, two C-axis synchronous pulleys, two C-axis anti-backlash structural components, and a C-axis large gear and a rotating shaft which are arranged between the two C-axis anti-backlash structural components and meshed with the two C-axis anti-backlash structural components at the same time;
the C-axis driving piece can drive any C-axis synchronous pulley to rotate, the C-axis synchronous pulley drives another C-axis synchronous pulley to rotate through the C-axis synchronous belt, the C-axis synchronous pulley is fixedly arranged at one end of the C-axis clearance elimination structural piece, the other end of the C-axis clearance elimination structural piece is meshed with the C-axis gear wheel, and the C-axis gear wheel is fixedly sleeved on the rotating shaft.
Optionally, the directions of the C-axis anti-backlash structural member and the A-axis anti-backlash structural member are mutually perpendicular, and the two structures are identical.
Optionally, the a-axis driving piece and the C-axis driving piece are both water-cooled motors.
Optionally, the second driving assembly further comprises a tensioning mechanism arranged at the bottom of the workbench;
the tensioning mechanism comprises an L-shaped mounting piece and a transverse adjusting piece perpendicular to the L-shaped mounting piece, wherein the L-shaped mounting piece is fixedly connected with the bottom of the workbench, one end of the transverse adjusting piece vertically penetrates through the L-shaped mounting piece and is fixedly connected with the C-axis driving piece, and the transverse adjusting piece can horizontally reciprocate relative to the L-shaped mounting piece so as to drive the C-axis driving piece to reciprocate in the horizontal direction.
Optionally, the first drive assembly further comprises a pneumatic clamping device;
the pneumatic clamping device is sleeved at one end of the swinging shaft, which is close to the workbench, and can generate braking force in the radial direction so as to clamp the end part of the swinging shaft.
And the first driving assembly and the second driving assembly are both provided with grating measuring devices.
Optionally, the horizontal plane of the top end surface of the C-axis workbench is lower than the swing axis of the swing shaft.
In another aspect, a five-axis machining center includes the cradle turret for a five-axis machining center.
The beneficial effects of the invention are as follows: according to the cradle turntable for the five-axis machining center, the A-axis driving piece of the swinging shaft is set to be one servo motor with two A-axis anti-backlash structural pieces to perform anti-backlash on the A-axis large gear, meanwhile, the A-axis adopts the servo motor with temperature control, the transmission ratio is large, and the requirement of large torque required by machining is met. The structure has compact layout, large transmission torque, stable transmission and high transmission efficiency.
Drawings
FIG. 1 is a schematic front view of a cradle turret for a five-axis machining center of the present invention;
FIG. 2 is an enlarged detail view of the cut-away portion of FIG. 1;
FIG. 3 is a schematic cross-sectional top view of FIG. 1;
FIG. 4 is a schematic cross-sectional view of D-D of FIG. 3;
fig. 5 is a schematic cross-sectional view of B-B of fig. 3.
Description of the reference numerals
1: a first drive assembly; 11: an A-axis driving member; 12: an A-axis synchronous belt; 13: an A-axis synchronous belt pulley; 14: axis A anti-backlash structural member; 141: a transmission rod; 142: a pinion gear; 15: an A-axis large gear; 16: a swing shaft; 2: a second drive assembly; 21: a C-axis driving member; 211: a motor mounting plate; 22: a C-axis synchronous belt; 23: c-axis synchronous belt wheels; 24: c-axis anti-backlash structural member; 25: a C-axis large gear; 26: a rotation shaft; 3: a tensioning mechanism; 31: an L-shaped mounting member; 32: a lateral adjustment member; 4: a pneumatic clamping device; 5: an expansion sleeve; 6: a shaft; 7: a speed reducer; 100: an A-axis housing; 200: a C-axis workbench; 300: a turntable base; 400: the A-axis assists in supporting the housing.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings. Wherein references herein to azimuthal nouns such as "upper", "lower", "left" and "right" are made to the orientation of fig. 1. Defined as "back" in the direction perpendicular to the paper surface in fig. 1; the position where the a-axis housing 100 is located is defined as "left".
Referring to fig. 1 to 5, a cradle turret according to an embodiment of the present invention includes a cradle turret for a five-axis machining center, an a-axis housing 100, a C-axis table 200, a turret base 300, and an a-axis auxiliary support housing.
Referring to fig. 1, the a-axis housing 100 and the a-axis auxiliary supporting housing 400 are provided at both left and right ends of the turntable base 300, respectively. And the left end of the turntable base 300 is connected to the swing shaft 16 of the first driving unit 1. The right end of the turntable base 300 is also provided with a swing shaft 16, and the swing shaft 16 at the right end rotates with the a-axis auxiliary support housing 400 through a bearing. Specifically, the a-axis housing 100 and the a-axis auxiliary support housing 400 each have a swing through hole horizontally in the lateral direction. The swing through holes at the two ends are used for installing swing shafts 16 which are arranged at the left end and the right end of the C-axis workbench 200 and are integrally formed with the workbench 200. The a-axis driving member 11 is disposed in the a-axis housing 100, and the a-axis driving member 11 is located between the a-axis timing belt 12 and the turntable base 300. The arrangement of the a-axis driving member 11 can further improve the space occupation ratio.
Further, the C-axis table 200 is disposed at the top of the turntable base 300, the second driving assembly 2 is disposed in the inner cavity of the turntable base 300, and the second driving assembly 2 can drive the C-axis table 200 to rotate relative to the turntable base 300.
In this embodiment, a cradle turret for a five-axis machining center includes a first drive assembly 1 for driving a swing shaft 16 to swing and a second drive assembly 2 for driving a rotating shaft 26 to rotate.
Further, the first driving assembly 1 includes an a-axis driving member 11, an a-axis synchronous belt 12, two a-axis synchronous pulleys 13, two a-axis anti-backlash structural members 14, and an a-axis large gear 15 and the oscillating shaft 16 which are disposed between the two a-axis anti-backlash structural members 14 and simultaneously meshed with the two a-axis anti-backlash structural members 14.
In this embodiment, the a-axis driving member 11 is a water-cooled motor, which has a small structural size, large rotating torque, and good temperature rise control effect, compared with a torque motor, and avoids a series of defects of large heat productivity and small output torque of the torque motor. The a-axis driving member 11 can drive any a-axis synchronous pulley 13 to rotate, the a-axis synchronous pulley 13 drives another a-axis synchronous pulley 13 to rotate through the a-axis synchronous belt 12, the a-axis synchronous pulley 13 is fixedly arranged at one end (left end) of the a-axis gap elimination structural member 14, the other end (right end) of the a-axis gap elimination structural member 14 is meshed with the a-axis large gear 15, and the a-axis large gear 15 is fixedly sleeved on the swing shaft 16.
According to the cradle turntable for the five-axis machining center, the driving piece of the swinging shaft 16 is set to be one A-axis driving piece 11 with two A-axis anti-backlash structural pieces 14 to perform anti-backlash on an A-axis large gear, meanwhile, the A-axis adopts the A-axis driving piece 11 to drive the two A-axis anti-backlash structural pieces 14, compared with the direct driving of a torque motor, the cradle turntable has the advantages of good temperature control effect, low cost, large A-axis transmission ratio and capability of meeting the requirement of large torque required by machining. Compared with the transmission mode of worm gears, the structure has compact layout, large transmission torque, stable transmission and high transmission efficiency.
It should be noted that, because the torque required by the swing axle 16 of the a-axis is large, compared with the worm and gear structure, the invention adopts a water-cooled motor, namely a servo motor, to drive the two a-axis synchronous pulleys 13 to rotate through the a-axis synchronous belt 12, and the left ends of the a-axis anti-backlash structural members 14 are inserted at the two a-axis synchronous pulleys 13. Specifically, the left end of the transmission rod 141 of the a-axis anti-backlash structure 14 is inserted into the mounting hole of the a-axis synchronous pulley 13. When the water-cooling motor is started, the A-axis synchronous belt 12 drives the A-axis synchronous belt pulley 13 to rotate respectively, the A-axis synchronous belt pulley 13 further drives the corresponding pinion 142 to rotate respectively, the two pinions 142 are meshed with the A-axis large gear 15 to further drive the A-axis large gear 15 to rotate, and the swing shaft 16 is driven to swing back and forth along the swing central axis due to the fact that the swing shaft 16 is inserted and fixed in the A-axis large gear 15. The two pinions 142 are meshed with the A-axis large gear 15, so that the two pinions 142 can mutually restrict and clamp the A-axis large gear 15 relative to the A-axis large gear 15 in the transmission process, and further gaps generated in the working process through transmission between one pinion and one large gear are prevented. Furthermore, the double gears are adopted to eliminate gaps, so that high-precision driving can be realized, and the gap eliminating torque can be set according to the requirement of transmission rigidity, so that the machining precision is improved.
Further, each of the a-axis anti-backlash structure 14 includes a transmission rod 141 and a pinion 142 connected to the transmission rod 141. The pinion 142 and the A-axis large gear 15 are meshed with each other, and the pinion 142 and the transmission rod 141 are integrally formed. The installation procedure is reduced, the installation and the use are convenient, the forming and the processing of the workpiece are convenient, and the cost is reduced.
Further, as shown in fig. 5, the two a-axis synchronous pulleys 13 are disposed in axisymmetric relation to an axis C-C passing through the swing center of the swing shaft 16, and the circle centers of the two pinion gears 142 are respectively connected with the circle center line of the a-axis large gear 15 at obtuse angles. The positional relationship between the pinion 142 and the a-axis large gear 15 is provided for the purpose of reasonably utilizing space and making the transmission effect of the force of the a-axis synchronous pulley 13 better.
Further, the first drive assembly 1 further comprises a pneumatic clamping device 4. The pneumatic clamping device 4 is sleeved at one end of the swinging shaft 16 close to the workbench, and the pneumatic clamping device 4 can generate braking force in the radial direction so as to clamp the end of the swinging shaft 16.
It is emphasized here that since the torque required for the a-axis is large, the clamping force required to maintain the swing angle of the turntable base 300 is large when the turntable base 300 is required to swing to the limit angle. The invention thus enables the clamping of the oscillating shaft 16 to be additionally assisted by the pneumatic clamping device 4, ensuring a greater cutting capacity of the a-axis stationary machine tool. Moreover, further clamping of the pneumatic clamping device 4 can be assisted by the engagement between the pinion 142 and the a-axis gearwheel 15, that is to say, in the present embodiment, the clamping forces in both aspects are used for co-clamping, which, compared to hydraulic clamping, both satisfies the clamping forces and saves clamping space and reduces the clamping costs.
Further, the second driving assembly 2 includes a C-axis driving member 21, a C-axis timing belt 22, two C-axis timing pulleys 23, two C-axis anti-backlash structures 24, and one C-axis large gear 25 and the rotating shaft 26 disposed between the two C-axis anti-backlash structures 24 and engaged with the two C-axis anti-backlash structures 24 at the same time.
Referring to fig. 4, the C-axis driving member 21 may drive any one of the C-axis synchronous pulleys 23 to rotate, the C-axis synchronous pulley 23 drives another C-axis synchronous pulley 23 to rotate by using the C-axis synchronous belt 22, the C-axis synchronous pulley 23 is fixedly provided with one end of the C-axis anti-backlash structure member 24, the other end of the C-axis anti-backlash structure member 24 is meshed with the C-axis large gear 25, and the C-axis large gear 25 is fixedly sleeved on the rotating shaft 26.
Further, the C-axis synchronous pulley 23 and the shaft 6 are fixed by the expansion sleeve 5, so that the shaft 6 can rotate along with the C-axis synchronous pulley 23, and the shaft 6 is connected with the speed reducer 7, so that the pinion driving rod of the C-axis anti-backlash structural member 24 on the speed reducer 7 rotates to drive the C-axis workbench 200 to rotate. Of course, in this embodiment, the driving wheel and the driven wheel are meshed with each other, so as to finally drive the C-axis table to rotate.
In the embodiment, the A shaft and the C shaft all adopt consistent cylindrical gear mechanical transmission structures, and the servo motor drives the workbench to swing and rotate through the synchronous pulley and the synchronous belt on the corresponding shafts, the two pinions and the large gear meshed with the two pinions.
Further, the directions of the C-axis anti-backlash structure 24 and the a-axis anti-backlash structure 14 are perpendicular to each other, and the two structures are identical. And will not be described in detail herein. Besides, the function and effect are the same as those of the A shaft, the second driving component 2 adopts the same transmission mechanism as the first driving component 1, and compared with the existing torque motor adopting direct driving, the clamping device is not required to be additionally arranged. It should be noted that, the existing torque motors all need to use additional clamping devices, and generally all use hydraulic clamping, so that the cost of hydraulic clamping is high and the occupied space is large. In contrast, the second driving assembly 2 of the present invention does not require an additional clamping device for clamping and braking due to the advantage of the transmission structure, and the pinion of the own transmission device can clamp to meet the requirements. Therefore, hydraulic clamping is saved, and cost is reduced.
Further, the a-axis driving member 11 and the C-axis driving member 21 are both water-cooled motors. The function is identical to that of the a-axis driving member 11 and will not be described in detail here.
Further, the second driving assembly 2 further comprises a tensioning mechanism 3 arranged at the bottom of the workbench.
Referring to fig. 2, the tensioning mechanism 3 includes an L-shaped mounting member 31 and a transverse adjusting member 32 perpendicular to the L-shaped mounting member 31, the L-shaped mounting member 31 is fixedly connected to the bottom of the table, one end (left end) of the transverse adjusting member 32 vertically passes through the L-shaped mounting member 31 and is fixedly connected to the a-axis driving member 11, further, the left end of the transverse adjusting member 32 is connected to the motor mounting plate 211, and the transverse adjusting member 32 can horizontally reciprocate relative to the L-shaped mounting member 31 to drive the a-axis driving member 11 to reciprocate in the horizontal direction. The tensioning mechanism 3 is also arranged on the first driving assembly 1, and the effects of the tensioning mechanism and the tensioning mechanism are consistent, so that the synchronous belt is always in a tight state, and the normal operation of the synchronous belt is ensured. The a/C shaft adopts a unique synchronous belt tensioning mode, and the center distance and thus the tension of the synchronous belt are adjusted by pushing and pulling the motor mounting plate 211.
Further, the top end surface of the C-axis table 200 is located at a level lower than the swing axis of the swing shaft 16. The horizontal plane of the C-axis table 200 is lower than the a-axis swing center line, so that the influence of the cutting load and the overall eccentric load of the a-axis on the a-axis transmission capability can be reduced when a workpiece with a large load is processed.
Furthermore, grating measurement is configured on the A/C shafts, so that closed-loop high-precision control of the two-shaft rotary motion is realized.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (10)
1. A cradle turntable for a five-axis machining center comprises a driving device, an A-axis shell (100), a C-axis workbench (200) and a turntable base (300);
the driving device comprises a first driving component (1) for driving the swing shaft (16) to swing and a second driving component (2) for driving the rotating shaft (26) to rotate; the method is characterized in that:
the first driving assembly (1) comprises an A-axis driving piece (11), an A-axis synchronous belt (12), two A-axis synchronous pulleys (13), two A-axis anti-backlash structural members (14), one A-axis large gear (15) and the swinging shaft (16), wherein the A-axis large gear is arranged between the two A-axis anti-backlash structural members (14) and meshed with the two A-axis anti-backlash structural members (14) at the same time;
the A-axis driving piece (11) can drive any A-axis synchronous pulley (13) to rotate, the A-axis synchronous pulley (13) drives the other A-axis synchronous pulley (13) to rotate through the A-axis synchronous belt (12), one end of the A-axis clearance eliminating structural piece (14) is fixedly arranged on the A-axis synchronous pulley (13), the other end of the A-axis clearance eliminating structural piece (14) is meshed with the A-axis large gear (15), and the A-axis large gear (15) is fixedly sleeved on the swinging shaft (16);
the A-axis shell (100) is arranged at one end of the turntable base (300), one end of the turntable base (300) is connected with the swinging shaft (16) of the first driving assembly (1), the A-axis driving piece (11) is arranged in the A-axis shell (100), and the A-axis driving piece (11) is positioned between the A-axis synchronous belt (12) and the turntable base (300);
the C-axis workbench (200) is arranged at the top of the turntable base (300), the second driving assembly (2) is arranged in the inner cavity of the turntable base (300), and the second driving assembly (2) can drive the C-axis workbench (200) to rotate relative to the turntable base (300).
2. The bassinet turret for a five-axis machining center of claim 1, wherein: each A-axis anti-backlash structure (14) comprises a transmission rod (141) and a pinion (142) connected with the transmission rod (141).
3. The bassinet turret for a five-axis machining center of claim 1, wherein: the second driving assembly (2) comprises a C-axis driving piece (21), a C-axis synchronous belt (22), two C-axis synchronous pulleys (23), two C-axis anti-backlash structural members (24), one C-axis large gear (25) and the rotating shaft (26), wherein the C-axis large gear is arranged between the two C-axis anti-backlash structural members (24) and meshed with the two C-axis anti-backlash structural members (24) at the same time;
the C-axis driving piece (21) can drive any C-axis synchronous pulley (23) to rotate, the C-axis synchronous pulley (23) drives another C-axis synchronous pulley (23) to rotate through the C-axis synchronous belt (22), the C-axis synchronous pulley (23) is fixedly provided with one end of a C-axis clearance eliminating structural member (24), the other end of the C-axis clearance eliminating structural member (24) is meshed with the C-axis large gear (25), and the C-axis large gear (25) is fixedly sleeved on the rotating shaft (26).
4. A bassinet turret for a five axis machining center as recited in claim 3, wherein: the directions of the C-axis anti-backlash structural member (24) and the A-axis anti-backlash structural member (14) are mutually perpendicular, and the structures of the two are identical.
5. The bassinet turret for a five-axis machining center of claim 4, wherein: the A-axis driving piece (11) and the C-axis driving piece (21) are both water-cooled motors.
6. The bassinet turret for a five-axis machining center of claim 5, wherein: the second drive assembly (2) comprises a tensioning mechanism (3);
the tensioning mechanism (3) comprises an L-shaped mounting piece (31) and a transverse adjusting piece (32) perpendicular to the L-shaped mounting piece (31), the L-shaped mounting piece (31) is fixedly connected with the bottom of the workbench, one end of the transverse adjusting piece (32) vertically penetrates through the L-shaped mounting piece (31) and is fixedly connected with the C-axis driving piece (21), and the transverse adjusting piece (32) can horizontally reciprocate relative to the L-shaped mounting piece (31) so as to drive the C-axis driving piece (21) to reciprocate in the horizontal direction.
7. The bassinet turret for a five-axis machining center of claim 1, wherein: the first driving assembly (1) further comprises a pneumatic clamping device (4);
the pneumatic clamping device (4) is sleeved at one end, close to the workbench, of the swinging shaft (16), and the pneumatic clamping device (4) can generate braking force in the radial direction so as to clamp the end part of the swinging shaft (16).
8. The bassinet turret for a five-axis machining center of claim 1, wherein: and the first driving assembly (1) and the second driving assembly (2) are both provided with grating measuring devices.
9. The bassinet turret for a five-axis machining center of claim 1, wherein: the horizontal plane of the top end surface of the C-axis workbench (200) is lower than the swinging axis of the swinging shaft (16).
10. A five machining center, its characterized in that: a bassinet turret for a five axis machining center comprising any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310452451.8A CN116175209A (en) | 2023-04-25 | 2023-04-25 | Cradle turntable for five-axis machining center |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310452451.8A CN116175209A (en) | 2023-04-25 | 2023-04-25 | Cradle turntable for five-axis machining center |
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| CN116175209A true CN116175209A (en) | 2023-05-30 |
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| CN202310452451.8A Pending CN116175209A (en) | 2023-04-25 | 2023-04-25 | Cradle turntable for five-axis machining center |
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Application publication date: 20230530 |