CN218556253U

CN218556253U - Cradle type AC rotary table and five-axis machining center

Info

Publication number: CN218556253U
Application number: CN202222623628.XU
Authority: CN
Inventors: 谭勇; 苏辉南; 张志伟; 余发国
Original assignee: Shanghai Nozoli Machine Tools Technology Co Ltd
Current assignee: Shanghai Nozoli Machine Tools Technology Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-03
Anticipated expiration: 2032-09-30

Abstract

The utility model provides a cradle formula AC revolving stage and five-axis machining center. The cradle type AC turntable comprises a first A-axis rotating structure, a second A-axis rotating structure and a C-axis rotating structure; the C-axis rotating structure is rotatably arranged between the first A-axis rotating structure and the second A-axis rotating structure, and the first A-axis rotating structure and the second A-axis rotating structure can drive the C-axis rotating structure to rotate around an A axis; the C-axis rotating structure comprises a cradle rotating platform main body and a workbench, and the cradle rotating platform main body can drive the workbench to rotate around a C axis; the C shaft is the axis of the workbench, and the A shaft is perpendicular to the C shaft; the utility model discloses a second A axle revolution mechanic is the same with first A axle revolution mechanic, and the design that the mirror image was arranged has avoided the unstable technical problem of during operation focus to all set up A axle motor in second A axle revolution mechanic and first A axle revolution mechanic, solved the not steady scheduling problem of unilateral drive.

Description

Cradle type AC rotary table and five-axis machining center

Technical Field

The utility model relates to a five processing machinery technical field specifically, relate to a cradle formula AC revolving stage and five-axis machining center.

Background

The five-axis machining center is applied to a five-axis linkage numerical control machine tool, is a machine tool which is high in technological content and precision and is specially used for machining complex curved surfaces, and the machine tool system has a very important influence on the industries of aviation, aerospace, military, scientific research, precision instruments, high-precision medical equipment and the like in one country. The existing AC turntable of the five-axis machining center adopts an asymmetric design, the center of gravity is unstable during working, and the machining precision is not high.

Patent document CN202120782173 provides an AC turntable device for a five-axis machining center, which includes an a shaft, two ends of the a shaft are rotatably connected with a first box and a second box respectively, the first box and the second box are fixed at two ends of a base respectively, an upper end of the a shaft is rotatably connected with a C shaft, a base is arranged in the a shaft, a turntable is arranged on the base, the base is fixedly connected with the turntable through a hydraulic cylinder, and the turntable is fixedly connected with the C shaft. However, the scheme still adopts the design of asymmetry and single motor, and still has the technical problems.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a cradle formula AC revolving stage and five-axis machining center.

According to the utility model provides a cradle type AC turntable, which comprises a first A-axis rotating structure, a second A-axis rotating structure and a C-axis rotating structure;

the C-axis rotating structure is rotatably arranged between the first A-axis rotating structure and the second A-axis rotating structure, and the first A-axis rotating structure and the second A-axis rotating structure can drive the C-axis rotating structure to rotate around the A-axis;

the C-axis rotating structure comprises a cradle rotating platform main body and a workbench, two ends of the cradle rotating platform main body are respectively rotatably connected with the first A-axis rotating structure and the second A-axis rotating structure, the workbench is rotatably arranged on the cradle rotating platform main body, and the cradle rotating platform main body can drive the workbench to rotate around a C axis;

the C shaft is the axis of the workbench, and the A shaft is perpendicular to the C shaft;

the first A-axis rotating structure comprises a first A-axis rotating assembly, and the first A-axis rotating assembly comprises a first disc tailstock, a first A-axis worm and gear group, a first rotating bearing and a first A-axis driving motor;

the first A-axis driving motor is provided with an external gear, and the external gear is in transmission connection with the first rotary bearing through a first A-axis worm gear group; the first A-axis driving motor can drive the first A-axis worm gear group to enable the first rotary bearing to rotate;

the second A-axis rotating structure and the first A-axis rotating structure are identical in structure and arranged in a mirror image mode along the C-axis rotating structure.

Preferably, a first end cover is installed on one side of the first disc tailstock, and a bent pipe joint is assembled on the first end cover.

Preferably, still install the adjustment protecting cover on the first disc tailstock, the adjustment protecting cover can be dismantled with first disc tailstock and be connected.

Preferably, the cradle turntable main body comprises a cradle turntable shell, a turntable bearing, a C-axis driving motor and a C-axis worm gear transmission set;

the C-axis motor mounting plate, the turntable bearing, the C-axis driving motor and the C-axis worm and gear transmission set are all arranged inside the cradle turntable shell;

the C-axis driving motor is in transmission connection with the C-axis worm gear transmission set, and the C-axis worm gear transmission set is connected with the workbench through a turntable bearing;

the C-axis driving motor can drive the C-axis worm gear transmission set to move, so that the workbench is driven to rotate around the C-axis worm gear transmission set.

Preferably, still be furnished with seal structure on the revolving stage bearing, seal structure includes oil blanket and bearing protecting cover, the outside at the revolving stage bearing is installed to the oil blanket, the bearing protecting cover is located in the oil blanket top, and is fixed through screw and cradle revolving stage main part.

Preferably, the cradle turntable shell and the turntable bearing are excessively assembled in a matching manner, and the parallelism and the concentricity of the cradle turntable shell and the turntable bearing are required to be ensured within the range of 0.01 mm.

Preferably, an oil tank is further arranged in the cradle turntable main body, an oil window oil mirror is mounted on a cover body of the oil tank, and the oil window oil mirror is used for observing the size of the internal oil mass.

Preferably, the adjusting protective cover is detachably mounted on the first disk tailstock in a screw locking mode.

Preferably, the oil window oil mirror is installed on the oil tank cover body in a screw locking mode.

According to the utility model provides a pair of five-axis machining center adopts cradle formula AC revolving stage.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a second A axle revolution mechanic is the same with first A axle revolution mechanic, and the design that the mirror image was arranged has avoided among the prior art because adopt asymmetric design, the unstable technical problem of during operation focus of existence to all set up A axle motor in second A axle revolution mechanic and first A axle revolution mechanic, solved prior art, the unilateral drive of motor, the motor drive power of existence is not enough, unilateral drive scheduling problem not steady.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the back structure of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the present invention;

fig. 4 is a top view of the present invention.

The figures show that:

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one of ordinary skill in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

The utility model provides a cradle type AC turntable, as shown in figures 1-4, the whole cradle type AC turntable adopts a U-shaped structure, and comprises a first A-axis rotating structure 100, a second A-axis rotating structure 200 and a C-axis rotating structure 300;

the C-axis rotating structure 300 is rotatably disposed between the first a-axis rotating structure 100 and the second a-axis rotating structure 200, and the first a-axis rotating structure 100 and the second a-axis rotating structure 200 can drive the C-axis rotating structure 300 to rotate around the a-axis;

c axle revolution mechanic 300 includes cradle revolving stage main part 6 and workstation 2, cradle revolving stage main part 6 both ends respectively with first A axle revolution mechanic 100, second A axle revolution mechanic 200 swivelling joint, workstation 2 swivelling joint with on the cradle revolving stage main part 6, cradle revolving stage main part 6 can drive workstation 2 around C rotation of axes. The C shaft is the axis of the workbench 2, and the A shaft is perpendicular to the C shaft.

As shown in fig. 1 to 4, the first a-axis rotating structure 100 includes a first a-axis rotating assembly, and the first a-axis rotating assembly includes a first disk tailstock 1, a first a-axis worm gear set 15, a first rotating bearing, a motor flange connecting plate 20, and a first a-axis driving motor. The first A-axis worm gear group 15, the first rotating bearing and the motor flange connecting plate 20 are all installed on the first disc tailstock 1. The first A-axis driving motor is provided with an external gear, and the external gear is in transmission connection with the first rotary bearing through a first A-axis worm gear group 15; the A-axis worm gear group 15 is arranged in the shell of the first disc tailstock 1, the gear gland 19 is arranged on the outer side of the A-axis worm gear group, and specifically, the first A-axis worm gear group 15 is firstly meshed with the outer gear and then fixedly connected with the first disc tailstock 1 in a screw locking mode. The gear cover 19 is used to ensure that the pinion gear position of the first a-axis worm gear set 15 does not change. The gear gland 19 is connected with the motor flange connecting plate 20, and in a preferred embodiment, the outer side of the gear gland 19 is connected with one end of the motor flange connecting plate 20 in a screw locking mode. The first a-axis driving motor is installed at the other end of the motor flange connection plate 20. When different types of driving motors are adopted, the sizes, hole positions and thicknesses of the motor flange connecting plates 20 can be adjusted to adapt to the installation of the driving motors of different types. The first a-axis driving motor can drive the first a-axis worm gear set 15 to rotate the first rotary bearing.

First end cover 4 is installed to one side of first disc tailstock 1, waterproof dustproof, the effect of pleasing to the eye protection that first end cover 4 mainly played, preferably, first end cover 4 is installed through the mode of screw fastening one side of first disc tailstock 1. The first end cover 4 is provided with an elbow joint which is used for protecting the cable so as to realize attractive routing. The first disk tailstock 1 is further provided with an adjusting protective cover 10, and in a preferred embodiment, the adjusting protective cover 10 is installed at the rear portion of the first disk tailstock 1 and detachably installed on the first disk tailstock 1, for example, by means of screw locking. The operator opens the adjusting protective cover 10, and can be convenient for later adjustment to the clearance error caused by the long-term abrasion of the first A-axis worm gear set 15.

In a preferred embodiment, the first a-axis rotating structure 100 further includes a first motor shield 5 connected to the first a-axis rotating component, and preferably, the first a-axis rotating component is connected to the first motor shield 5 by fastening screws, and the first motor shield 5 is used for protecting the first a-axis driving motor, and also plays a role in making the cradle type AC turntable overall simple and beautiful.

The second a-axis rotating structure 200 is identical to the first a-axis rotating structure 100 in structure and is arranged in a mirror image along the C-axis rotating structure 300. Specifically, the second a-axis rotating structure 200 includes a second disc tailstock 3, a second end cap, a first motor shield, a second motor shield 8, a second end cap 9, a second coupling flange 13, and the like, and the structure of the second a-axis rotating structure 200 is identical to the structure of the first a-axis rotating structure 100.

The cradle turntable main body 6 comprises a cradle turntable shell, a C-axis motor mounting plate 16, a turntable bearing 23, a C-axis driving motor and a C-axis worm gear transmission set 18. The C-axis motor mounting plate 16, the turntable bearing 23, the C-axis drive motor and the C-axis worm gear transmission set 18 are all arranged inside the cradle turntable shell. The C-axis motor mounting plate 16 is used for mounting a C-axis driving motor, the C-axis driving motor is in transmission connection with the C-axis worm gear transmission set 18, and the C-axis worm gear transmission set 18 is connected with the workbench 2 through a turntable bearing 23. The C-axis driving motor can drive the C-axis worm gear transmission set 18 to move, so that the whole workbench is driven to rotate. Still be provided with second inductive switch 17 on the C axle motor mounting panel 16, second inductive switch 17 is the detection device of the power of C axle worm gear transmission group 18 for whether the rotation accuracy of detecting C axle workstation meets the requirements. The cradle turntable shell and the turntable bearing 23 are excessively matched and assembled and are fixedly connected with each other in a screw locking mode, and the parallelism and the concentricity are required to be ensured within the range of 0.01mm during assembly. In a preferred embodiment, the turntable bearing 23 is further provided with a sealing structure, the sealing structure comprises an oil seal 22 and a bearing protecting cover 21, and the oil seal 22 is mounted on the outer side of the turntable bearing 23 and is used for protecting the cleanliness of lubricating oil of the turntable bearing 23 and reducing the leakage of grease. The bearing protecting cover 21 is positioned above the oil seal 22 and is fixed with the cradle turntable main body 6 through screws, so that the effects of sand prevention and dust prevention can be achieved, and the integral cleaning effect in the bearing is also ensured. In a preferred embodiment, a side protecting cover 7 is also mounted on the cradle turntable housing. In a preferred embodiment, an oil tank is further arranged in the cradle turntable main body 6, an oil window oil mirror 12 is mounted on a cover body of the oil tank in a screw locking mode, and the oil window oil mirror 12 is used for observing the amount of the internal oil.

In a preferred embodiment, the cradle turntable housing is rotatably connected with the first A-axis rotating assembly through the cooperation of the first A-axis driving motor and the first rotating bearing. In another preferred example, the cradle AC turntable further comprises a first coupling flange 11 and a second coupling flange 13; the first connecting flange 11 and the second connecting flange 13 are respectively assembled with the first disk tailstock 1 and the second disk tailstock 3 in a screw locking mode. The first coupling flange 11 and the second coupling flange 13 are assembled with the first rotating bearing and the first rotating bearing in an over-assembling mode respectively. Specifically, during assembly, the coaxiality range of the connecting flange and the disc tailstock needs to be ensured within 0.015MM, and then the matching coaxiality of the connecting flange and the disc tailstock which are connected with the 6 cradle turntable main body also needs to be ensured within 0.015 MM. The coupling flange is arranged to provide a certain supporting force for the rotary bearing.

In a preferred embodiment, the first a-axis driving motor and the C-axis driving motor are both motors with clasping devices, so as to fix the position of the cradle type AC turntable after the rotation to the position. In another preferred embodiment, the cradle AC rotary table further includes a hydraulic locking structure, the first a-axis worm gear set 15 and the C-axis worm gear transmission set 18 are both provided with the hydraulic locking structure, the hydraulic locking structure is driven by hydraulic pressure, and the clamping groove and the pressing plate are matched with each other to lock and release the worm gear set, so as to fix the cradle AC rotary table after rotating to a certain position. In a preferred embodiment, the cradle AC turntable further includes a first inductive switch 14, the first inductive switch 14 is a worm gear transmission detection device, the first inductive switch 14 can be fixed on the first disk tailstock 1 in a screw locking manner, and the first inductive switch 14 can sense whether the power of the first a-axis worm gear set 15 meets the requirement.

The utility model discloses a second A axle revolution mechanic 200 is the same with first A axle revolution mechanic 100 structure, and the design that the mirror image was arranged has avoided among the prior art because adopt asymmetric design, the unstable technical problem of during operation focus of existence to all set up A axle motor in second A axle revolution mechanic 200 and first A axle revolution mechanic 100, solved among the prior art, the unilateral drive of motor, the motor drive power of existence is not enough, the not steady scheduling problem of unilateral drive. Besides, the scheme achieves multiple sealing of the cradle rotary table through the line diameter deformation of the sealing element and the designed prepressing amount, improves the protection grade, and enables the cradle rotary table to be suitable for more working conditions. And the transmission speed increasing and reducing of the cradle turntable and the increase of the torque are realized by the meshing of the mechanical gears, the diameter of the gears and the change of the transmission proportion. The utility model discloses still through the brake of fluid pressure type locking structure, relax, realize the fixed point processing of the AC axle of cradle revolving stage, provide powerful rigidity processing basis. Finally, the high-sensitivity first inductive switch 14 can execute different instructions according to different states by matching induction and the second inductive switch 17, and the safety factor, the working precision and the stability of the cradle turntable are dually guaranteed. The utility model discloses a theory of operation as follows:

and assembling the cradle type AC turntable on a three-axis machining center to form a five-axis machining center. The first disk tailstock 1 and the second disk tailstock 3 can drive the C-axis rotating structure 300 to rotate around the a-axis by a rotation angle of ± 120 °. The cradle turntable body 6 can drive the workbench 2 to rotate around the C axis. The rotation angle is 0-360 degrees, and the five-axis machining center realizes multi-angle machining of the workpiece through a plurality of self-scale movements or rotations. Specifically, the cradle type AC turntable can be divided into a-axis rotation and C-axis rotation according to a rotation mode, the a-axis rotation mainly drives the rotation bearings in the first disk tailstock 1 and the second disk tailstock 3 to rotate through the transmission of the motor-driven 15A-axis worm gear set, so as to drive the worktable 2 to rotate back and forth, and the C-axis rotation mainly drives the C-axis worm gear transmission set 18 through the C-axis drive motor to drive the turntable bearing 23 of the cradle turntable main body 6 to rotate the worktable along 360 degrees of the C-axis drive motor.

The utility model also provides a five machining centers, adopt cradle formula AC revolving stage.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing descriptions have been directed to embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A cradle-type AC turntable, comprising a first A-axis rotation structure (100), a second A-axis rotation structure (200), and a C-axis rotation structure (300);

the C-axis rotating structure (300) is rotatably arranged between the first A-axis rotating structure (100) and the second A-axis rotating structure (200), and the first A-axis rotating structure (100) and the second A-axis rotating structure (200) can drive the C-axis rotating structure (300) to rotate around an A axis;

the C-axis rotating structure (300) comprises a cradle rotating table main body (6) and a workbench (2), two ends of the cradle rotating table main body (6) are respectively in rotatable connection with the first A-axis rotating structure (100) and the second A-axis rotating structure (200), the workbench (2) is rotatably arranged on the cradle rotating table main body (6), and the cradle rotating table main body (6) can drive the workbench (2) to rotate around a C axis;

the shaft C is the axis of the workbench (2), and the shaft A is perpendicular to the shaft C;

the first A-axis rotating structure (100) comprises a first A-axis rotating assembly, and the first A-axis rotating assembly comprises a first disc tailstock (1), a first A-axis worm gear group (15), a first rotating bearing and a first A-axis driving motor;

the first A-axis driving motor is provided with an external gear, and the external gear is in transmission connection with the first rotating bearing through a first A-axis worm gear group (15); the first A-axis driving motor can drive the first A-axis worm gear group (15) to rotate the first rotary bearing;

the second A-axis rotating structure (200) is identical to the first A-axis rotating structure (100) in structure and arranged in a mirror image mode along the C-axis rotating structure (300).

2. Cradle AC turntable according to claim 1, characterized in that a first end cap (4) is mounted on one side of the first disc tailstock (1) and a elbow joint is fitted on the first end cap (4).

3. The cradle type AC turntable according to claim 1, wherein an adjusting protective cover (10) is further mounted on the first disk tailstock (1), and the adjusting protective cover (10) is detachably connected with the first disk tailstock (1).

4. The cradle-type AC turntable according to claim 1, wherein the cradle turntable body (6) comprises a cradle turntable housing, a turntable bearing (23), a C-axis drive motor, and a C-axis worm gear drive set (18);

the C-axis motor mounting plate (16), the turntable bearing (23), the C-axis drive motor and the C-axis worm and gear transmission group (18) are all arranged in the cradle turntable shell;

the C-axis driving motor is in transmission connection with a C-axis worm gear transmission set (18), and the C-axis worm gear transmission set (18) is connected with the workbench (2) through a turntable bearing (23);

the C-axis driving motor can drive the C-axis worm gear transmission set (18) to move, so that the workbench is driven to rotate around the C-axis worm gear transmission set.

5. The cradle type AC rotary table according to claim 4, wherein the rotary table bearing (23) is further provided with a sealing structure, the sealing structure comprises an oil seal (22) and a bearing protecting cover (21), the oil seal (22) is installed on the outer side of the rotary table bearing (23), and the bearing protecting cover (21) is located above the oil seal (22) and fixed with the cradle rotary table main body (6) through screws.

6. The cradle type AC turntable according to claim 4, characterized in that the cradle turntable housing and the turntable bearing (23) are over-fitted, and the parallelism and concentricity of the cradle turntable housing and the turntable bearing (23) are both guaranteed within the range of 0.01 mm.

7. The cradle type AC turntable according to claim 1, characterized in that the cradle turntable body (6) is further provided with an oil tank therein, and an oil window oil glass (12) is mounted on a cover body of the oil tank, wherein the oil window oil glass (12) is used for observing the amount of oil inside.

8. Cradle AC turntable according to claim 3, characterized in that an adjusting cover (10) is detachably mounted on the first disc tailstock (1) by means of screw locking.

9. The cradle-type AC turntable according to claim 7, wherein the oil tank cover body is provided with an oil window oil mirror (12) by means of screw locking.

10. A five-axis machining center, characterized in that a cradle AC turret according to any one of claims 1 to 9 is used.