Five-axis cradle rotary table

Abstract

The invention relates to the technical field of machining center rotary tables, and discloses a five-axis cradle rotary table which is characterized by comprising an A-axis rotary assembly, an A-axis brake assembly, a C-axis assembly and a cradle body. The C-axis assembly is arranged in the middle of the cradle body, one end of the cradle body is connected with the A-axis rotating assembly, and the other end of the cradle body is connected with the A-axis braking assembly through the A mandrel. The A shaft brake assembly comprises an A brake inner ring and an A brake outer ring, the A brake inner ring is used for sleeving the A core shaft, the A brake outer ring is fixedly arranged and sleeves the A brake inner ring, an A brake pad is further arranged between the A brake inner ring and the A brake outer ring, the A brake pad is connected to the inner wall of the A brake outer ring, and the A brake pad is connected to the inner wall of the A brake outer ring. An oil injection hole A used for injecting oil into a gap A between the brake pad A and the inner wall of the brake outer ring A is formed in the brake outer ring A. By means of the arrangement, the machining precision of the workpiece can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machining center turntables, and particularly to a five-axis cradle turntable. Background Art

[0002] The five-axis cradle turntable can realize the machining of multiple surfaces and angles of a workpiece under one clamping. In fields with extremely high precision requirements such as aerospace and precision molds, the application of the five-axis cradle turntable is becoming more and more extensive.

[0003] The existing five-axis cradle turntable mainly realizes braking by driving a brake pad to cooperate with a rotating shaft through an oil cylinder. This braking method has limited braking force, and there is a situation where the inertia after rotation causes the workpiece to be misaligned, seriously affecting the final machining accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a five-axis cradle turntable to improve machining accuracy.

[0005] To achieve the above purpose, the present invention provides the following solution:

[0006] A five-axis cradle turntable, comprising: an A-axis rotation assembly, an A-axis brake assembly, a C-axis assembly and a cradle body; the C-axis assembly is arranged in the middle of the cradle body, one end of the cradle body is connected to the A-axis rotation assembly, and the other end of the cradle body is connected to the A-axis brake assembly through an A-core shaft; the A-axis brake assembly includes: an A-brake inner ring and an A-brake outer ring. The A-brake inner ring is used to be sleeved outside the A-core shaft, the A-brake outer ring is fixedly arranged, and the A-brake outer ring is sleeved outside the A-brake inner ring. An A-brake pad is also arranged between the A-brake inner ring and the A-brake outer ring. The A-brake pad is connected to the inner wall of the A-brake outer ring, and an A-oil injection hole for injecting oil into an A-gap between the A-brake pad and the inner wall of the A-brake outer ring is arranged on the A-brake outer ring.

[0007] Preferably, an A-oil locking structure is arranged on one side of the A-brake pad close to the A-brake outer ring, and the A-oil locking structure is a convex structure.

[0008] Preferably, the convex structure is a tooth-shaped structure.

[0009] Preferably, the A-axis brake assembly further includes a fixed connection assembly, and the A-brake outer ring is connected to the fixed connection assembly; the fixed connection assembly includes an outer connection assembly and / or an inner connection assembly. The outer connection assembly is an A-housing body, a part of the A-brake outer ring is connected to the A-housing body, and another part of the A-brake outer ring is connected to the inner connection assembly.

[0010] Preferably, a cavity is provided inside the mandrel. The inner connection assembly includes a connecting plate, an inner sleeve, and an outer sleeve. The inner sleeve and the outer sleeve are both arranged inside the cavity. The inner sleeve is fixedly arranged. The outer sleeve is sleeved outside the inner sleeve. The inner sleeve is rotatably connected to the outer sleeve. The outer sleeve is connected to the A mandrel through a flange. One end of the connecting plate is connected to the inner sleeve, and the other end of the connecting plate is connected to another part of the A brake outer ring.

[0011] Preferably, the C-axis assembly includes a C mandrel, a C bearing assembly, and a C-axis brake mechanism arranged inside the cradle body. The C mandrel is connected to the cradle body through the C bearing assembly. A workbench is arranged on one end face of the C mandrel, and the other end face of the C mandrel is detachably connected to the C-axis brake mechanism.

[0012] Preferably, the C-axis brake mechanism includes: a C brake inner ring and a C brake outer ring arranged inside the cradle body. The C brake inner ring is provided with a first threaded hole, and the C mandrel is provided with a second threaded hole. The first threaded hole and the second threaded hole are in corresponding positions. A screw is threadedly connected to the first threaded hole and the second threaded hole to realize the connection between the end face of the C brake inner ring and the C mandrel. The C brake outer ring is sleeved outside the C brake inner ring. The C brake outer ring is fixedly arranged. C brake pads are arranged on the inner wall of the C brake outer ring. A C oil locking structure is arranged in the C gap between the C brake pads and the inner wall of the C brake outer ring. A C oil injection hole is arranged on the C brake outer ring, and the C oil injection hole is used to connect the hydraulic system and the C gap.

[0013] Preferably, the C bearing assembly includes a large bearing, a bearing support assembly, and a small bearing. The large bearing cooperates with one end of the C mandrel close to the workbench. The large bearing is connected to the cradle body through the bearing support assembly. The small bearing cooperates with the other end of the C mandrel far from the workbench. In the radial direction, the cradle body limits the small bearing. In the axial direction, the C mandrel and the C brake inner ring limit the small bearing.

[0014] Preferably, the bearing support assembly includes a bearing support body and a C motor. The rotor of the C motor is detachably connected to the C mandrel. The stator of the C motor is detachably connected to the cradle body. The bearing support body is detachably connected to the stator of the C motor. A part of the large bearing is arranged on the bearing support body, and another part of the large bearing is arranged on the rotor of the C motor.

[0015] Preferably, the A-axis rotation assembly includes a motor housing and an A-motor, a main shaft and a main bearing disposed within the motor housing. The rotor of the A-motor is connected to one end of the cradle body through the main shaft. The stator of the A-motor is detachably connected to the motor housing. One end of the main shaft close to the cradle body is connected to the motor housing through the main bearing.

[0016] According to the description of the above solution, the present invention discloses the following technical effects:

[0017] The present invention provides a five-axis cradle turntable, including: an A-axis rotation assembly, an A-axis brake assembly, a C-axis assembly and a cradle body; the C-axis assembly is disposed in the middle of the cradle body. One end of the cradle body is connected to the A-axis rotation assembly, and the other end of the cradle body is connected to the A-axis brake assembly through an A-core shaft; the A-axis brake assembly includes: an A-brake inner ring and an A-brake outer ring. The A-brake inner ring is used to sleeved outside the A-core shaft. The A-brake outer ring is fixedly disposed, and the A-brake outer ring is sleeved outside the A-brake inner ring. An A-brake pad is further disposed between the A-brake inner ring and the A-brake outer ring. The A-brake pad is connected to the inner wall of the A-brake outer ring. An A-oil injection hole is disposed on the A-brake outer ring for injecting oil into an A-gap between the A-brake pad and the inner wall of the A-brake outer ring. The A-brake assembly is arranged as an annular brake structure sleeved outside the A-core shaft and uses hydraulic braking, which is beneficial to improving the braking effect on the cradle body, thus avoiding the situation of workpiece misalignment caused by the rotational inertia of the cradle body and improving the machining accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is an axonometric schematic diagram of the five-axis cradle turntable provided by the embodiment of the present specification;

[0020] Figure 2 It is a full-sectional schematic diagram of the five-axis cradle turntable provided by the embodiment of the present specification;

[0021] Figure 3 It is a full-sectional schematic diagram of the A-axis rotation assembly provided by the embodiment of the present specification;

[0022] Figure 4 It is a full-sectional schematic diagram of the A-axis brake assembly provided by the embodiment of the present specification;

[0023] Figure 5 It is a full-sectional schematic diagram of the C-axis assembly and the cradle body provided by the embodiment of the present specification;

[0024] Figure 6 Provided for the embodiments of this specification Figure 4 Partial enlarged view of part A therein;

[0025] Wherein, 1 - main shaft; 2 - A motor; 3 - main bearing; 4 - outer ring of pressure bearing; 5 - motor housing; 6 - grating support; 7 - A grating; 8 - end cover; 9 - A mandrel; 10 - inner ring of pressure bearing; 11 - A housing body; 12 - inner ring of A brake; 13 - outer ring of A brake; 131 - tooth-shaped structure; 14 - rear cover; 15 - C mandrel; 16 - large bearing; 17 - small bearing; 18 - bearing support body; 19 - bearing retaining ring; 20 - cradle body; 21 - C motor; 22 - inner ring of C brake, 23 - outer ring of C brake; 24 - time grating adjusting piece; 25 - grating encoder shaft; 26 - C grating; 27 - grating positioning frame; 28 - grating large disc; 29 - bottom cover; 30 - workbench. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1-2 shown, the embodiments of this specification provide a five-axis cradle turntable, including: A-axis rotation assembly, A-axis brake assembly, C-axis assembly and cradle body 20; the C-axis assembly is arranged in the middle of the cradle body 20, one end of the cradle body 20 is connected to the A-axis rotation assembly, and the A-axis rotation assembly is used to drive the cradle body 20 to swing; the other end of the cradle body 20 is connected to the A-axis brake assembly through the A mandrel 9, and the A-axis brake assembly is used to brake the A cradle body 20; as Figure 4 shown, the A-axis brake assembly includes: inner ring 12 of A brake and outer ring 13 of A brake. The inner ring 12 of A brake is used to sleeved outside the A mandrel 9, the outer ring 13 of A brake is fixedly arranged, and the outer ring 13 of A brake is sleeved outside the inner ring 12 of A brake. An A brake pad is also arranged between the inner ring 12 of A brake and the outer ring 13 of A brake. The A brake pad is connected to the inner wall of the outer ring 13 of A brake. The outer ring 13 of A brake is provided with an A oil injection hole for injecting oil into the A gap between the A brake pad and the inner wall of the outer ring 13 of A brake. By injecting oil into the gap, the A brake pad contacts the outer wall of the inner ring 12 of A brake to achieve braking. The A brake pad is of an annular structure and can realize circumferential braking of the cradle body 20 through the A mandrel 9. Circumferential braking is beneficial to improving the braking effect, thereby avoiding the situation of workpiece misalignment caused by the rotational inertia of the cradle body 20, and further being beneficial to improving the machining accuracy of the workpiece.

[0028] As shown Figure 6 in the figure, on one side of the A brake pad close to the A brake outer ring 13, there is an A oil locking structure, and the A oil locking structure is a convex structure. The convex structure is used to increase the oil locking amount, so as to increase the deformation of the A brake pad, improve the braking effect, and further ensure the workpiece processing accuracy.

[0029] The convex structure is preferably a tooth-shaped structure 131, and can also be set as a semi-circular convex according to actual needs.

[0030] The A-axis brake assembly further includes a fixed connection assembly, and the A brake outer ring 13 is connected to the fixed connection assembly; the fixed connection assembly includes an outer connection assembly and / or an inner connection assembly. The outer connection assembly is the A housing 11, a part of the A brake outer ring 13 is connected to the A housing 11, and another part of the A brake outer ring 13 is connected to the inner connection assembly, so as to fix the A brake outer ring 13.

[0031] There is a cavity inside the A mandrel 9. The inner connection assembly specifically includes a connecting plate, an inner sleeve and an outer sleeve. Both the inner sleeve and the outer sleeve are arranged in the cavity. The inner sleeve is fixedly arranged, the outer sleeve is sleeved outside the inner sleeve, the inner sleeve is rotatably connected to the outer sleeve, and the outer sleeve is connected to the A mandrel 9 through a flange. One end of the connecting plate is connected to the inner sleeve, and the other end of the connecting plate is connected to another part of the A brake outer ring 13, so as to fix the A brake outer ring 13.

[0032] As shown Figure 5 in the figure, the C-axis assembly includes a C mandrel 15, a C bearing assembly and a C-axis brake mechanism arranged inside the cradle body 20. The C mandrel 15 is connected to the cradle body 20 through the C bearing assembly. A workbench 30 is arranged on one end face of the C mandrel 15, and the other end face of the C mandrel 15 is detachably connected to the C-axis brake mechanism.

[0033] The C-axis braking mechanism includes: a C-brake inner ring 22 and a C-brake outer ring 23 disposed inside the cradle body 20. The C-brake inner ring 22 is provided with a first threaded hole, and the C-core shaft 15 is provided with a second threaded hole. The positions of the first threaded hole and the second threaded hole correspond to each other. A screw is threadedly connected to the first threaded hole and the second threaded hole to achieve the end-face connection between the C-brake inner ring 22 and the C-core shaft 15. The C-brake outer ring 23 is sleeved outside the C-brake inner ring 22, and the C-brake outer ring 23 is fixedly arranged. A C-brake pad is provided on the inner wall of the C-brake outer ring 23, and a C-oil locking structure is arranged in the C-gap between the C-brake pad and the inner wall of the C-brake outer ring 23. A C-oil injection hole is provided on the C-brake outer ring 23, and the C-oil injection hole is used to connect the hydraulic system and the C-gap. The C-core shaft 15 is braked by the above annular braking structure, which is beneficial to improving the braking effect, preventing the workpiece from being misaligned under the action of inertia, and thus beneficial to improving the machining accuracy of the workpiece. A time grating adjusting piece 24 is installed on the C-brake outer ring 23. At the same time, a grating encoder shaft 25 is installed on the C-core shaft 15. The C-grating 26 and the grating positioning frame 27 are connected and fixed to the grating encoder shaft 25. A grating large disc 28 is installed on the grating positioning frame 27, and a bottom cover 29 is arranged outside the grating large disc 28. The bottom cover 29 is fixed to the cradle body 20.

[0034] The C-bearing assembly includes a large bearing 16, a bearing support assembly, and a small bearing 17. The large bearing 16 is matched with one end of the C-core shaft 15 close to the workbench 30. The large bearing 16 is connected to the cradle body 20 through the bearing support assembly. The small bearing 17 is matched with the end of the C-core shaft 15 far from the workbench 30. In the radial direction, the cradle body 20 limits the small bearing 17. In the axial direction, the C-core shaft 15 and the C-brake inner ring 22 limit the small bearing 17. Such a setting is beneficial to preventing the large bearing 16 and the small bearing 17 from moving axially, and is beneficial to improving the stability of the C-axis assembly.

[0035] The bearing support assembly includes a bearing support body 18 and a C-motor 21. The rotor of the C-motor 21 is detachably connected to the C-core shaft 15, the stator of the C-motor 21 is detachably connected to the cradle body 20, and the bearing support body 18 is detachably connected to the stator of the C-motor 21. A part of the large bearing 16 is arranged on the bearing support body 18, and another part of the large bearing 16 is arranged on the rotor of the C-motor 21, so as to realize the support of the large bearing 16.

[0036] As Figure 3As shown in the figure, the A-axis rotating assembly includes a motor housing 5 and an A-motor 2, a main shaft 1 and a main bearing disposed within the motor housing 5. The rotor of the A-motor 2 is connected to one end of the cradle body 20 through the main shaft 1. The stator of the A-motor 2 is detachably connected to the motor housing 5. One end of the main shaft 1 close to the cradle body 20 is connected to the motor housing through the main bearing 3, so that the workbench 30 on the cradle body 20 is swung by the A-axis rotating assembly. The outer ring of the pressure bearing 4 is used to limit the main bearing 3. The outer ring of the pressure bearing 4 contacts the main bearing 3 and is fixed to the motor housing 5. The rear fixing plate is installed on the motor housing 5. The grating bracket 6 is fixed to the rear fixing plate. The A-grating 7 is fixed to the grating bracket 6. The end cover 8 is fixed to the rear fixing plate. At the same time, the inner ring of the pressure bearing 10 is connected to the A-core shaft 2, and the inner ring of the pressure bearing is arranged inside. The rear cover 14 is connected to the A-housing 11.

[0037] In the present specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0038] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method of the present invention and its core idea. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A five-axis cradle turntable, characterized in that, Comprising: A-axis rotation assembly, A-axis brake assembly, C-axis assembly and cradle body; the C-axis assembly is arranged in the middle of the cradle body, one end of the cradle body is connected to the A-axis rotation assembly, and the other end of the cradle body is connected to the A-axis brake assembly through an A-spindle; the A-axis brake assembly includes: an A-brake inner ring and an A-brake outer ring, the A-brake inner ring is used to sleeved outside the A-spindle, the A-brake outer ring is fixedly arranged, and the A-brake outer ring is sleeved outside the A-brake inner ring. An A-brake pad is also arranged between the A-brake inner ring and the A-brake outer ring. The A-brake pad is connected to the inner wall of the A-brake outer ring, and an A-oil injection hole is arranged on the A-brake outer ring for injecting oil into the A-gap between the A-brake pad and the inner wall of the A-brake outer ring.

2. The five-axis cradle turntable according to claim 1, characterized in that, An A-oil locking structure is arranged on one side of the A-brake pad close to the A-brake outer ring, and the A-oil locking structure is a convex structure.

3. The five-axis cradle turntable according to claim 2, characterized in that, The convex structure is a tooth-shaped structure.

4. The five-axis cradle turntable according to claim 1, wherein The A-axis brake assembly further includes a fixed connection assembly, and the A-brake outer ring is connected to the fixed connection assembly; the fixed connection assembly includes an outer connection assembly and / or an inner connection assembly. The outer connection assembly is an A-housing, a part of the A-brake outer ring is connected to the A-housing, and another part of the A-brake outer ring is connected to the inner connection assembly.

5. The five-axis cradle turntable according to claim 4, wherein A cavity is arranged inside the A-spindle. The inner connection assembly includes a connecting plate, an inner sleeve and an outer sleeve. The inner sleeve and the outer sleeve are both arranged in the cavity. The inner sleeve is fixedly arranged, the outer sleeve is sleeved outside the inner sleeve, the inner sleeve is rotatably connected to the outer sleeve, the outer sleeve is connected to the A-spindle through a flange, one end of the connecting plate is connected to the inner sleeve, and the other end of the connecting plate is connected to another part of the A-brake outer ring.

6. The five-axis cradle turntable according to claim 1, wherein The C-axis assembly includes a C-spindle, a C-bearing assembly and a C-axis brake mechanism arranged inside the cradle body. The C-spindle is connected to the cradle body through the C-bearing assembly. A workbench is arranged on one end face of the C-spindle, and the other end face of the C-spindle is detachably connected to the C-axis brake mechanism.

7. The five-axis cradle turntable according to claim 6, characterized in that, The C-axis brake mechanism includes: a C-brake inner ring and a C-brake outer ring arranged inside the cradle body. The C-brake inner ring is provided with a first threaded hole, and the C-spindle is provided with a second threaded hole. The positions of the first threaded hole and the second threaded hole correspond to each other. A screw is threadedly connected to the first threaded hole and the second threaded hole to realize the end face connection between the C-brake inner ring and the C-spindle. The C-brake outer ring is sleeved outside the C-brake inner ring, the C-brake outer ring is fixedly arranged, a C-brake pad is arranged on the inner wall of the C-brake outer ring, and a C-oil locking structure is arranged in the C-gap between the C-brake pad and the inner wall of the C-brake outer ring; a C-oil injection hole is arranged on the C-brake outer ring, and the C-oil injection hole is used to connect the hydraulic system and the C-gap.

8. The five-axis cradle turntable according to claim 7, characterized in that, The C bearing assembly includes a large bearing, a bearing support assembly, and a small bearing. The large bearing is engaged with one end of the C mandrel close to the workbench. The large bearing is connected to the cradle body through the bearing support assembly. The small bearing is engaged with the other end of the C mandrel away from the workbench. In the radial direction, the cradle body positions the small bearing. In the axial direction, the C mandrel and the C brake inner ring position the small bearing.

9. The five-axis cradle turntable according to claim 8, characterized in that, The bearing support assembly includes a bearing support body and a C motor. The rotor of the C motor is detachably connected to the C mandrel. The stator of the C motor is detachably connected to the cradle body. The bearing support body is detachably connected to the stator of the C motor. Part of the large bearing is arranged on the bearing support body, and the other part of the large bearing is arranged on the rotor of the C motor.

10. The five-axis cradle turntable according to claim 1, wherein The A-axis rotation assembly includes a motor housing and an A motor, a main shaft, and a main bearing arranged in the motor housing. The rotor of the A motor is connected to one end of the cradle body through the main shaft. The stator of the A motor is detachably connected to the motor housing. One end of the main shaft close to the cradle body is connected to the motor housing through the main bearing.

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