AB axis structure double swing head for five-axis horizontal turning and plate machining center

Abstract

The application discloses an AB shaft structure double swing head for a five-axis horizontal flip plate machining center, which comprises a sliding seat, an A shaft assembly, a B shaft assembly and a spindle assembly. The sliding seat is provided with a double fork structure at one end, and the double fork is provided with a B shaft driving part and a driven part. A support frame is arranged between the B shaft driving part and the driven part, and the support frame is provided with an A shaft driving part and a driven part. The spindle assembly is arranged between the A shaft driving part and the driven part. The B shaft driving part is provided with a B shaft driving device, which comprises a B shaft first motor, a B shaft first speed reducer and a B shaft second speed reducer. The B shaft first motor drives the support frame to rotate after being decelerated by the B shaft first speed reducer and the B shaft second speed reducer. The A shaft driving part is provided with an A shaft driving device, which comprises an A shaft first motor, an A shaft first speed reducer and an A shaft second speed reducer. The A shaft first motor drives the spindle assembly to rotate after being decelerated by the A shaft first speed reducer and the A shaft second speed reducer. The two-stage speed reducer of the application can increase the torque and provide greater torque output.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, and in particular to an AB-axis structure double swing head for a five-axis horizontal flip-plate machining center. Background Technology

[0002] Currently, five-axis linkage machining equipment has been developed for many years and is approaching perfection, basically capable of machining various curved surfaces and complex cavities. However, its machining efficiency still needs improvement when dealing with titanium alloy structural parts and complex cavity parts with high material removal rates in the aerospace field. Although a few companies have developed five-axis horizontal flip-plate machining centers for horizontal machining of structural parts, most of them are AC direct-drive swivel heads. This type of swivel head directly drives the rotary flange to rotate through a torque motor. Although its transmission structure is simple, it suffers from insufficient torque due to the limitations of the torque motor. Summary of the Invention

[0003] This invention provides an AB-axis structure double swing head for a five-axis horizontal flip-plate machining center to solve the technical problem of insufficient torque in existing AC swing heads.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A double-swivel head with AB axis structure for a five-axis horizontal flip-plate machining center includes: a slide connected to the machine tool body, an A-axis assembly, a B-axis assembly, and a spindle assembly; one end of the slide has a double-fork structure, and the two forks of the double-fork structure are respectively provided with the B-axis drive part and the B-axis driven part of the B-axis assembly; a support frame is rotatably connected between the B-axis drive part and the B-axis driven part, and the support frame is respectively provided with the A-axis drive part and the A-axis driven part of the A-axis assembly; the spindle assembly is rotatably connected between the A-axis drive part and the A-axis driven part.

[0006] The B-axis drive unit is equipped with a B-axis drive device, which includes a B-axis first motor, a B-axis first reducer, and a B-axis second reducer. The B-axis first motor drives the support frame to rotate after being reduced in sequence by the B-axis first reducer and the B-axis second reducer.

[0007] The A-axis drive unit is equipped with an A-axis drive device, which includes an A-axis first motor, an A-axis first reducer, and an A-axis second reducer. The A-axis first motor drives the spindle assembly to rotate after being reduced in sequence by the A-axis first reducer and the A-axis second reducer.

[0008] Furthermore, the B-axis two-stage reducer includes a B-axis double synchronous gear set and a B-axis driven gear; the B-axis double synchronous gear set includes: a B-axis first drive shaft, a B-axis first synchronous gear, and a B-axis second synchronous gear; the B-axis first synchronous gear and the B-axis second synchronous gear are coaxially fixed on the B-axis first drive shaft; the B-axis first synchronous gear is connected to the output end of the B-axis first reducer, the B-axis second synchronous gear is connected to the B-axis driven gear, and the B-axis driven gear drives the support frame to rotate.

[0009] Furthermore, the driven gear on the B-axis is a sector gear.

[0010] Furthermore, the B-axis drive device also includes: a second B-axis motor and a second B-axis reducer, with the output end of the second B-axis motor connected to the second B-axis reducer; and two sets of B-axis double synchronous gear sets, one set of which is connected to the output end of the first B-axis reducer and the other set of which is connected to the output end of the second B-axis reducer.

[0011] Furthermore, the A-axis two-stage reducer includes an A-axis double synchronous gear set and an A-axis driven gear; the A-axis double synchronous gear set includes: an A-axis first drive shaft, an A-axis first synchronous gear, and an A-axis second synchronous gear; the A-axis first synchronous gear and the A-axis second synchronous gear are coaxially fixed on the A-axis first drive shaft; the A-axis first synchronous gear is connected to the output end of the A-axis first reducer, and the A-axis second synchronous gear is connected to the A-axis driven gear, which drives the main shaft assembly to rotate.

[0012] Furthermore, the A-axis drive device also includes: an A-axis second motor and an A-axis second reducer, with the output end of the A-axis second motor connected to the A-axis second reducer; the A-axis double synchronous gear set consists of two sets, one set of which is connected to the output end of the A-axis first reducer, and the other set of which is connected to the output end of the A-axis second reducer.

[0013] Furthermore, the double fork structure has a first bearing hole and a second bearing hole for the B-axis respectively. The first bearing hole and the second bearing hole for the B-axis are coaxial and correspond to the B-axis drive part and the B-axis driven part respectively.

[0014] The B-axis has a rotating flange inside the first bearing hole, and the B-axis secondary reducer drives the support frame to rotate through the B-axis rotating flange.

[0015] A B-axis support flange is rotatably installed inside the second bearing hole of the B-axis, and a support frame is fixedly connected to the end of the B-axis support flange facing the first bearing hole of the B-axis.

[0016] Furthermore, the double-fork structure is equipped with a B-axis angle encoder, which is used to measure the rotation angle of the B-axis support flange.

[0017] Furthermore, the support frame has a first bearing hole and a second bearing hole for the A-axis. The first bearing hole and the second bearing hole for the A-axis are coaxial and correspond to the A-axis drive part and the A-axis driven part, respectively.

[0018] An A-axis slewing flange is rotatably mounted inside the first bearing hole of the A-axis. The A-axis secondary reducer drives the spindle assembly to rotate through the A-axis slewing flange.

[0019] An A-axis support flange is rotatably installed inside the second bearing hole of the A-axis, and the end of the A-axis support flange facing the first bearing hole of the A-axis is fixedly connected to the spindle assembly.

[0020] Furthermore, the slide block is equipped with a slider and a lead screw, and the Z-axis of the five-axis horizontal flip plate machining center is equipped with a guide rail and a lead screw. The slider cooperates with the guide rail, and the lead screw and lead screw are driven by a screw.

[0021] Beneficial effects:

[0022] First, this application uses a two-stage reducer to reduce the speed of the motor and increases the torque through the two-stage reducer, which can provide a greater torque output than a direct-drive torque motor.

[0023] Secondly, this application sets up two sets of motors to drive the driven wheel. By driving the two sets of motors in forward and reverse directions respectively, the gear meshing backlash is eliminated, avoiding the backlash error caused by the single motor, and improving the motion accuracy of the oscillating head.

[0024] Third, both the A-axis and B-axis assemblies adopt a double-fork structure, resulting in a compact overall structure and high rigidity for the oscillating head. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the AB-axis double-swivel head structure for a five-axis horizontal flip-plate machining center disclosed in this invention;

[0027] Figure 2 This is a structural schematic diagram of an AB-axis double-swivel head support frame and spindle assembly assembly for a five-axis horizontal flip-plate machining center disclosed in this invention.

[0028] Figure 3 This is a cross-sectional view of an AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center disclosed in this invention;

[0029] Figure 4 This is a schematic diagram of the gear structure inside the B-axis two-stage reducer of an AB-axis double-swivel head for a five-axis horizontal flip-plate machining center disclosed in this invention.

[0030] Figure 5 This is a cross-sectional view of an AB-axis structure double-swivel head support frame and spindle assembly assembly for a five-axis horizontal flip-plate machining center disclosed in this invention.

[0031] Figure 6 This is a schematic diagram of the gear structure inside the A-axis two-stage reducer of an AB-axis double-swivel head for a five-axis horizontal flip-plate machining center disclosed in this invention.

[0032] 1. Slide;

[0033] 2. Spindle assembly;

[0034] 31. Support frame; 32. A-axis angle encoder; 33. Mounting plate;

[0035] 4. A-axis two-stage reducer; 41. A-axis first drive shaft; 42. A-axis first synchronous gear; 43. A-axis second synchronous gear; 44. A-axis driven wheel; 45. A-axis slewing flange; 46. A-axis turntable bearing; 47. A-axis support flange; 48. A-axis tapered roller bearing;

[0036] 5. B-axis two-stage reducer; 51. B-axis first drive shaft; 52. B-axis first synchronous gear; 53. B-axis second synchronous gear; 54. B-axis driven wheel; 55. B-axis slewing flange; 56. B-axis turntable bearing; 57. B-axis support flange; 58. B-axis tapered roller bearing; 59. B-axis angle encoder;

[0037] 61. A-axis first motor; 62. A-axis first reducer; 63. A-axis second motor; 64. A-axis second reducer;

[0038] 71. B-axis first motor; 72. B-axis first reducer; 73. B-axis second motor; 74. B-axis second reducer;

[0039] 8. Slider;

[0040] 9. Mother silk. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] A double-swivel head structure for an AB axis of a five-axis horizontal flip-plate machining center, combined with Figure 1 and Figure 2 As shown, the machine tool includes: a slide 1 connected to the main body of the machine tool, an A-axis assembly, a B-axis assembly, and a spindle assembly 2; one end of the slide 1 has a double-fork structure, and the two forks of the double-fork structure are respectively provided with the B-axis drive part and the B-axis driven part of the B-axis assembly; a support frame 31 is rotatably connected between the B-axis drive part and the B-axis driven part, and the A-axis drive part and the A-axis driven part of the A-axis assembly are respectively provided on the support frame 31, and the spindle assembly 2 is rotatably connected between the A-axis drive part and the A-axis driven part. The B-axis drive part is provided with a B-axis drive device, which includes: a B-axis first motor 71, a B-axis first reducer 72, and a B-axis second-stage reducer 5; the B-axis first motor 71 drives the support frame 31 to rotate after being reduced in speed by the B-axis first reducer 72 and the B-axis second-stage reducer 5 in sequence. The A-axis drive unit is equipped with an A-axis drive device, which includes an A-axis first motor 61, an A-axis first reducer 62, and an A-axis second-stage reducer 4. The A-axis first motor 61 drives the spindle assembly 2 to rotate after being reduced in speed by the A-axis first reducer 62 and the A-axis second-stage reducer 4 in sequence. Both the A-axis assembly and the B-axis assembly use two reducers to reduce the speed of the motors, and the force is amplified by the two reducers, which can provide a larger torque output than a direct-drive torque motor.

[0043] Preferably, the spindle assembly 2 includes an electric spindle and a spindle box. The electric spindle is installed inside the spindle box, which rotates around the A-axis under the drive of the output end of the A-axis two-stage reducer 4. The spindle box drives the electric spindle to rotate synchronously. The spindle box can protect the electric spindle and can also install the transmission and speed change device of the electric spindle to enable the electric spindle to obtain various speeds to achieve the main cutting motion.

[0044] Preferably, the B-axis first reducer 72 and the A-axis first reducer 62 are planetary reducers. Planetary reducers are characterized by high reduction ratio, high precision, and compact structure, which can efficiently reduce the speed of the motor, improve transmission accuracy, and reduce space occupation.

[0045] Preferably, the B-axis first motor 71 and the A-axis first motor 61 are servo motors. Servo motors have advantages such as high precision, good high-speed performance, strong overload resistance, smooth low-speed operation, short dynamic response time for motor acceleration and deceleration, and low heat generation and noise.

[0046] Specifically, in combination Figure 1 , Figure 3 and Figure 4 As shown, the B-axis two-stage reducer 5 includes a B-axis double synchronous gear set and a B-axis driven gear 54. The B-axis double synchronous gear set includes a B-axis first drive shaft 51, a B-axis first synchronous gear 52, and a B-axis second synchronous gear 53. The B-axis first synchronous gear 52 and the B-axis second synchronous gear 53 are coaxially fixed on the B-axis first drive shaft 51. The B-axis first synchronous gear 52 is connected to the output end of the B-axis first reducer 72, and the B-axis second synchronous gear 53 is connected to the B-axis driven gear 54. The B-axis driven gear 54 drives the support frame 31 to rotate. The B-axis double synchronous gear set and the B-axis driven gear 54 form a two-stage reducer for speed reduction. Utilizing the principle that the torque increases after gear reduction, the output torque is increased and output by the B-axis driven gear 54.

[0047] Preferably, a first gear is installed at the output end of the B-axis first reducer 72, and the first gear meshes with the B-axis first synchronous gear 52 to realize the transmission of power from the B-axis first reducer 72 to the B-axis second reducer 5; the number of teeth of the B-axis first synchronous gear 52 is greater than the number of teeth of the first gear to realize two-stage reduction.

[0048] Preferably, the first drive shaft 51 of the B-axis is a spline shaft, and the inner holes of the first synchronous gear 52 and the second synchronous gear 53 of the B-axis are machined with corresponding keyways. The first synchronous gear 52 and the second synchronous gear 53 of the B-axis are sequentially sleeved on the first drive shaft 51 of the B-axis to ensure that the first synchronous gear 52 and the second synchronous gear 53 of the B-axis are coaxial and rotate synchronously.

[0049] Specifically, the driven wheel 54 on the B-axis is a sector gear. The sector gear can reduce the size of the gear, thereby saving space and making the overall structure of the B-axis two-stage reducer 5 more compact and smaller in size.

[0050] Specifically, in combination Figure 1 , Figure 3 and Figure 4 As shown, the B-axis drive device also includes: a second B-axis motor 73 and a second B-axis reducer 74, with the output end of the second B-axis motor 73 connected to the second B-axis reducer 74; the B-axis double synchronous gear set consists of two sets, one set of which is connected to the output end of the first B-axis reducer 72, and the other set of which is connected to the output end of the second B-axis reducer 74.

[0051] During the positive stroke, the first motor 71 of the B-axis rotates in the forward direction to drive the rotation of the second synchronous gear 53 of the first set of double synchronous gears on the B-axis. The second synchronous gear 53 of the first set of double synchronous gears on the B-axis meshes with the driven wheel 54 on the B-axis. At the same time, the driven wheel 54 of the B-axis meshes with the second synchronous gear 53 of the second set of double synchronous gears on the B-axis, and the driven wheel 54 of the B-axis pushes the second synchronous gear 53 of the second set of double synchronous gears on the B-axis to rotate. At this time, the meshing clearance between the second synchronous gear 53 of the first set of double synchronous gears on the B-axis and the driven wheel 54 of the B-axis is zero along the positive stroke direction, and the meshing clearance between the second synchronous gear 53 of the second set of double synchronous gears on the B-axis and the driven wheel 54 of the B-axis is zero along the negative stroke direction.

[0052] When the stroke is negative, the second motor 73 of the B-axis rotates in the opposite direction to drive it. Since the meshing clearance between the second synchronous gear 53 of the second set of B-axis double synchronous gears and the driven wheel 54 of the B-axis is zero in the direction of negative stroke, the second synchronous gear 53 of the second set of B-axis double synchronous gears drives the driven wheel 54 of the B-axis to rotate.

[0053] By using the first motor 71 and the second motor 73 on the B-axis to drive the forward and reverse directions respectively, the problem of backlash caused by meshing clearance during the return stroke is eliminated when a single motor is driven, thus ensuring the accuracy of transmission and improving the motion precision of the oscillating head rotating around the B-axis.

[0054] Preferably, the B-axis first motor 71, B-axis first reducer 72, B-axis second motor 73, and B-axis second reducer 74 are located on the outer side of the double-forked structure, that is, on the side of the B-axis drive unit away from the B-axis driven unit. Since the length of the motor and reducer is greater than their width, placing the motor and reducer on the outer side of the double-forked structure can avoid interference between the motor and reducer and the movement of the slide block 1 and the support frame 31.

[0055] Specifically, in combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the A-axis two-stage reducer 4 includes an A-axis double synchronous gear set and an A-axis driven gear 44. The A-axis double synchronous gear set includes an A-axis first drive shaft 41, an A-axis first synchronous gear 42, and an A-axis second synchronous gear 43. The A-axis first synchronous gear 42 and the A-axis second synchronous gear 43 are coaxially fixed on the A-axis first drive shaft 41. The A-axis first synchronous gear 42 is connected to the output end of the A-axis first reducer 62, and the A-axis second synchronous gear 43 is connected to the A-axis driven gear 44. The A-axis driven gear 44 drives the main shaft assembly 2 to rotate. The A-axis double synchronous gear set and the A-axis driven gear 44 form a two-stage reducer for speed reduction. Utilizing the principle that the torque increases after gear reduction, the output torque is increased and output by the A-axis driven gear 44.

[0056] Preferably, a second gear is installed at the output end of the first reducer 62 on the A-axis. The second gear meshes with the first synchronous gear 42 on the A-axis, so that power is transmitted from the first reducer 62 on the A-axis to the second reducer 4 on the A-axis. The number of teeth of the first synchronous gear 42 on the A-axis is greater than the number of teeth of the second gear, so as to achieve two-stage reduction.

[0057] Preferably, the first drive shaft 41 of axis A is connected to both the first synchronous gear 42 and the second synchronous gear 43 of axis A by splines, ensuring that the first synchronous gear 42 and the second synchronous gear 43 of axis A are coaxial and rotate synchronously. The connection structure of the double synchronous gear set of axis A is the same as that of the double synchronous gear set of axis B, and will not be described again here.

[0058] Preferably, the driven wheel 44 of the A-axis is a sector gear, which makes the overall structure of the A-axis two-stage reducer 4 more compact and its size smaller.

[0059] Specifically, the A-axis drive device also includes: an A-axis second motor 63 and an A-axis second reducer 64, with the output end of the A-axis second motor 63 connected to the A-axis second reducer 64; the A-axis double synchronous gear set consists of two sets, one set of which is connected to the output end of the A-axis first reducer 62, and the other set of which is connected to the output end of the A-axis second reducer 64.

[0060] The positive and negative stroke processes of the A-axis drive device are the same as those of the B-axis drive device, and will not be repeated here. The first A-axis motor 61 and the second A-axis motor 63 are responsible for the forward and reverse drives respectively, eliminating the backlash caused by meshing clearance during the return stroke when driven by a single motor. This ensures transmission accuracy and improves the motion precision of the oscillating head rotating around the A-axis.

[0061] Preferably, a mounting plate 33 is fixed to the side of the support frame 31 away from the spindle assembly 2. The mounting plate 33 is located at the edge of the support frame 31 on the side of the A-axis drive section. The mounting plate 33 is fixed to the support frame 31 by screws. The A-axis first motor 61, A-axis first reducer 62, A-axis second motor 63, and A-axis second reducer 64 are located on the side of the mounting plate 33 away from the A-axis drive section. The output ends of the A-axis first reducer 62 and A-axis second reducer 64 pass through the mounting plate 33 and are connected to the second gear. The second gears of the A-axis first reducer 62 and A-axis second reducer 64 mesh with the A-axis first synchronous gear 42 in the two sets of A-axis double synchronous gear sets to achieve power output. The arrangement of the motors and reducers allows them to move together with the support frame 31, making full use of the space between the support frame 31 and the slide 1. This avoids the motors and reducers interfering with the connection between the slide 1 and the machine tool Z-axis when they are outside the A-axis drive section, or preventing the motors and reducers from interfering with the slide 1 due to length when they are outside the A-axis driven section.

[0062] Specifically, in combination Figure 1 and Figure 3 As shown, the double-forked structure has a first bearing hole and a second bearing hole for the B-axis, which are coaxial and correspond to the B-axis drive unit and the B-axis driven unit, respectively. A B-axis rotary flange 55 is rotatably mounted within the first bearing hole, and the B-axis two-stage reducer 5 drives the support frame 31 to rotate via the rotary flange 55. A B-axis support flange 57 is rotatably mounted within the second bearing hole, and the end of the support flange 57 facing the first bearing hole is fixedly connected to the support frame 31. The B-axis two-stage reducer outputs torque through the rotary flange 55, which drives the support frame 31 to rotate; the support flange 57 rotates along with the support frame 31, providing auxiliary support to the support frame 31.

[0063] Preferably, the fan-shaped driven wheel 54 of the B-axis is sleeved and fixed on the B-axis rotary flange 55, and the B-axis rotary flange 55 rotates synchronously with the driven wheel 54 of the B-axis to realize the output of torque.

[0064] Preferably, a B-axis rotary bearing 56 is installed between the B-axis slewing flange 55 and the B-axis first bearing hole to achieve rotatable connection and radial positioning between the B-axis slewing flange 55 and the B-axis first bearing hole. One end of the B-axis rotary bearing 56 abuts against the positioning step in the B-axis first bearing hole, and the other end is pressed by the B-axis first bearing cover, thereby achieving axial positioning of the B-axis slewing flange 55.

[0065] A tapered roller bearing 58 is installed between the B-axis support flange 57 and the B-axis second bearing hole to achieve rotational connection and radial positioning between the B-axis support flange 57 and the B-axis second bearing hole. One end of the B-axis tapered roller bearing 58 abuts against the positioning step in the B-axis second bearing hole, and the other end is pressed by the B-axis second bearing cover, thereby achieving axial positioning of the B-axis support flange 57.

[0066] Specifically, the double-fork structure is equipped with a B-axis angle encoder 59, which is used to measure the rotation angle of the B-axis support flange 57, thereby realizing the measurement of the rotation angle of the B-axis.

[0067] Preferably, the B-axis angle encoder 59 is an electromagnetic angle encoder, which includes an inner ring and an outer ring. The outer ring is coaxial with the B-axis support flange 57 and fixed to the double-fork structure through the B-axis adapter flange. The inner ring is connected to the B-axis support flange 57 through the B-axis rotary joint and rotates with the B-axis support flange 57. The B-axis angle encoder 59 can adjust the positioning accuracy of the support frame 31 rotating around the B-axis.

[0068] Specifically, in combination Figure 1 , Figure 2 and Figure 5 As shown, the support frame 31 has a first bearing hole and a second bearing hole for the A-axis. The first and second bearing holes are coaxial and correspond to the A-axis drive unit and the A-axis driven unit, respectively. An A-axis rotary flange 45 is rotatably mounted within the first bearing hole, and the A-axis two-stage reducer 4 drives the spindle assembly 2 to rotate via the rotary flange 45. An A-axis support flange 47 is rotatably mounted within the second bearing hole, and the end of the A-axis support flange 47 facing the first bearing hole is fixedly connected to the spindle assembly 2. The A-axis two-stage reducer 4 outputs torque through the rotary flange 45, which drives the spindle assembly 2 to rotate. The A-axis support flange 47 rotates along with the spindle assembly 2, providing auxiliary support to the spindle assembly 2.

[0069] Preferably, the fan-shaped A-axis driven wheel 44 is sleeved and fixed on the A-axis rotary flange 45, and the A-axis rotary flange 45 rotates synchronously with the A-axis driven wheel 44 to realize torque output.

[0070] Preferably, an A-axis rotary bearing 46 is installed between the A-axis rotary flange 45 and the A-axis first bearing hole to achieve rotational connection and radial positioning between the A-axis rotary flange 45 and the A-axis first bearing hole. One end of the A-axis rotary bearing 46 abuts against the positioning step in the A-axis first bearing hole, and the other end is pressed by the A-axis first bearing cover, thereby achieving axial positioning of the A-axis rotary flange 45.

[0071] An A-axis tapered roller bearing 48 is installed between the A-axis support flange 47 and the A-axis second bearing hole, enabling rotational connection and radial positioning between the A-axis support flange 47 and the A-axis second bearing hole. One end of the A-axis tapered roller bearing 48 abuts against the positioning step inside the A-axis second bearing hole, and the other end is pressed by the A-axis second bearing cover, thereby achieving axial positioning of the A-axis support flange 47.

[0072] Preferably, the support frame 31 is equipped with an A-axis angle encoder 32, which is used to measure the rotation angle of the A-axis support flange 47, thereby measuring the rotation angle of the B-axis. The A-axis angle encoder 32 is an electromagnetic angle encoder, which includes an inner ring and an outer ring. The outer ring is coaxial with the A-axis support flange 47 and is fixed to the support frame 31 through an A-axis adapter flange. The inner ring is connected to the A-axis support flange 47 through an A-axis rotary joint and rotates with the A-axis support flange 47. The A-axis angle encoder 32 can adjust the positioning accuracy of the spindle assembly 2 rotating around the A-axis.

[0073] Specifically, the slide block 1 is equipped with a slider 8 and a lead screw 9, and the five-axis horizontal flip plate machining center is equipped with a guide rail and a lead screw on the Z-axis; the slider 8 cooperates with the guide rail to achieve guidance; the lead screw 9 and the lead screw are driven by a screw to realize the linear motion of the slide block 1 along the Z-axis.

[0074] Preferably, the slider 8 and the lead screw 9 are located on the inner side of the slide block 1. After the slider 8 and the lead screw 9 are connected to the guide rail and lead screw on the machine tool, the five-axis linkage machining is realized by the combination of the swivel head and the XYZ axis of the machine tool.

[0075] This AB-axis dual-swivel head offers advantages such as high torque, precise transmission, and high rigidity, making it suitable for machining cavities in titanium alloy panel-like structural components used in the aerospace field. Furthermore, when performing the same machining features, the rotation angles of the A and B axes are smaller compared to the C-axis rotation angle of the AC-axis swivel head. Simultaneous movement of the A and B axes saves time and enables rapid response.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-swivel head with AB axis structure for a five-axis horizontal flip-plate machining center, comprising: The slide (1), A-axis assembly, B-axis assembly, and spindle assembly (2) are connected to the main body of the machine tool. The slide (1) is characterized in that one end of the slide (1) is a double-fork structure, and the double forks of the double-fork structure are respectively provided with the B-axis drive part and the B-axis driven part of the B-axis assembly; a support frame (31) is rotatably connected between the B-axis drive part and the B-axis driven part, and the A-axis drive part and the A-axis driven part of the A-axis assembly are respectively provided on the support frame (31), and the spindle assembly (2) is rotatably connected between the A-axis drive part and the A-axis driven part. The B-axis drive unit is provided with a B-axis drive device, which includes: a B-axis first motor (71), a B-axis first reducer (72), and a B-axis second reducer (5); the B-axis first motor (71) drives the support frame (31) to rotate after being decelerated by the B-axis first reducer (72) and the B-axis second reducer (5) in sequence. The B-axis two-stage reducer (5) includes a B-axis double synchronous gear set and a B-axis driven wheel (54); the B-axis double synchronous gear set includes: a B-axis first drive shaft (51), a B-axis first synchronous gear (52) and a B-axis second synchronous gear (53); the B-axis first synchronous gear (52) and the B-axis second synchronous gear (53) are coaxially fixed on the B-axis first drive shaft (51); the B-axis first synchronous gear (52) is connected to the output end of the B-axis first reducer (72), the B-axis second synchronous gear (53) is connected to the B-axis driven wheel (54), and the B-axis driven wheel (54) drives the support frame (31) to rotate; The A-axis drive unit is provided with an A-axis drive device, which includes: an A-axis first motor (61), an A-axis first reducer (62), and an A-axis second reducer (4). The A-axis first motor (61) drives the spindle assembly (2) to rotate after being reduced in sequence by the A-axis first reducer (62) and the A-axis second reducer (4). The A-axis two-stage reducer (4) includes an A-axis double synchronous gear set and an A-axis driven wheel (44); the A-axis double synchronous gear set includes: an A-axis first drive shaft (41), an A-axis first synchronous gear (42) and an A-axis second synchronous gear (43); the A-axis first synchronous gear (42) and the A-axis second synchronous gear (43) are coaxially fixed on the A-axis first drive shaft (41); the A-axis first synchronous gear (42) is connected to the output end of the A-axis first reducer (62), the A-axis second synchronous gear (43) is connected to the A-axis driven wheel (44), and the A-axis driven wheel (44) drives the main shaft assembly (2) to rotate.

2. The AB-axis double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The driven wheel (54) on the B-axis is a sector gear.

3. The AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The B-axis drive device further includes: a second B-axis motor (73) and a second B-axis reducer (74), the output end of the second B-axis motor (73) being connected to the second B-axis reducer (74); the B-axis double synchronous gear set consists of two sets, one set of the B-axis double synchronous gear set being connected to the output end of the first B-axis reducer (72), and the other set of the B-axis double synchronous gear set being connected to the output end of the second B-axis reducer (74).

4. The AB-axis double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The A-axis drive device further includes: an A-axis second motor (63) and an A-axis second reducer (64), the output end of the A-axis second motor (63) is connected to the A-axis second reducer (64); the A-axis double synchronous gear set consists of two sets, one set of the A-axis double synchronous gear set is connected to the output end of the A-axis first reducer (62), and the other set of the A-axis double synchronous gear set is connected to the output end of the A-axis second reducer (64).

5. The AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The double fork structure has a first bearing hole and a second bearing hole for the B-axis respectively. The first bearing hole and the second bearing hole for the B-axis are coaxial and correspond to the B-axis drive part and the B-axis driven part respectively. The B-axis first bearing hole is provided with a B-axis rotary flange (55), and the B-axis secondary reducer (5) drives the support frame (31) to rotate through the B-axis rotary flange (55). A B-axis support flange (57) is rotatably provided inside the second bearing hole of the B-axis, and the support frame (31) is fixedly connected to one end of the B-axis support flange (57) facing the first bearing hole of the B-axis.

6. The AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center according to claim 5, characterized in that, The double-fork structure is equipped with a B-axis angle encoder (59), which is used to measure the rotation angle of the B-axis support flange (57).

7. The AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The support frame (31) has an A-axis first bearing hole and an A-axis second bearing hole. The A-axis first bearing hole and the A-axis second bearing hole are coaxial. The A-axis first bearing hole and the A-axis second bearing hole correspond to the A-axis driving part and the A-axis driven part, respectively. An A-axis rotary flange (45) is rotatably provided inside the first bearing hole of the A-axis, and the A-axis secondary reducer (4) drives the main shaft assembly (2) to rotate through the A-axis rotary flange (45); An A-axis support flange (47) is rotatably provided inside the second bearing hole of the A-axis, and the spindle assembly (2) is fixedly connected to one end of the A-axis support flange (47) facing the first bearing hole of the A-axis.

8. The AB-axis structure double-swivel head for a five-axis horizontal flip-plate machining center according to claim 1, characterized in that, The slide block (1) is provided with a slider (8) and a lead screw (9). The five-axis horizontal flip plate machining center is provided with a guide rail and a lead screw on the Z-axis. The slider (8) cooperates with the guide rail, and the lead screw (9) is driven by the lead screw.

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