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

Abstract

The invention discloses an AB-axis structure double-swing head for a five-axis horizontal turning plate machining center. The AB-axis structure double-swing head comprises a sliding seat, an A-axis assembly, a B-axis assembly and a main shaft assembly. One end of the sliding seat is of a double-fork-shaped structure, and double forks of the sliding seat are provided with a B-axis driving part and a driven part; a supporting frame is arranged between the B-axis driving part and the driven part, the supporting frame is provided with an A-axis driving part and a driven part, and the main shaft assembly is arranged between the A-axis driving part and the driven part. The B-axis driving part is provided with a B-axis driving device, and the B-axis driving device comprises a B-axis first motor, a B-axis first speed reducer and a B-axis second-stage speed reducer; the B-axis first motor drives the supporting frame to rotate after being decelerated by the B-axis first speed reducer and the B-axis second-stage speed reducer. The A-axis driving part is provided with an A-axis driving device, the A-axis driving device comprises an A-axis first motor, an A-axis first speed reducer and an A-axis second-stage speed reducer, and the A-axis first motor drives the main shaft assembly to rotate after being decelerated by the A-axis first speed reducer and the A-axis second-stage speed reducer. According to the two-stage speed reducer, speed reduction and torque increase are achieved, and larger torque output can be provided.

Description

Technical Field

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

[0002] At present, five-axis linkage cutting processing equipment has been developed for many years and is close to perfection. It can basically realize the processing of various curved surfaces and complex cavities. However, in the face of titanium alloy structural parts and complex cavity parts with high removal rates in the aerospace field, the processing efficiency still needs to be improved. Although a few companies have developed five-axis horizontal flap machining centers for horizontal machining of structural parts, most of them are AC direct-drive swing heads. This type of swing head directly drives the slewing flange through a torque motor to achieve rotation. Although its transmission structure is simple, it is limited by the capacity of the torque motor, and this type of swing head has the problem of insufficient torque. Summary of the invention

[0003] The invention provides an AB-axis structure double-swing head for a five-axis horizontal plate turning machining center, so as to solve the technical problem of insufficient torque of the existing AC swing head.

[0004] In order to achieve the above object, the technical solution of the present invention is:

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

[0006] The B-axis driving part is provided with a B-axis driving device, which includes: a B-axis first motor, a B-axis first reducer and a B-axis secondary reducer; the B-axis first motor drives the support frame to rotate after being decelerated by the B-axis first reducer and the B-axis secondary reducer in sequence.

[0007] The A-axis driving part is provided with an A-axis driving device, which includes: an A-axis first motor, an A-axis first reducer and an A-axis secondary reducer. The A-axis first motor drives the spindle assembly to rotate after being decelerated by the A-axis first reducer and the A-axis secondary reducer in sequence.

[0008] Furthermore, the B-axis secondary reducer includes a B-axis double synchronous gear set and a B-axis driven wheel; 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 wheel, and the B-axis driven wheel drives the support frame to rotate.

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

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

[0011] Furthermore, the A-axis secondary reducer includes an A-axis double synchronous gear set and an A-axis driven wheel; 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, the A-axis second synchronous gear is connected to the A-axis driven wheel, and the A-axis driven wheel drives the main shaft assembly to rotate.

[0012] Furthermore, the A-axis driving device also includes: an A-axis second motor and an A-axis second reducer, and the output end of the A-axis second motor is connected to the A-axis second reducer; the A-axis double-coupled synchronous gear set is divided into two groups, one group of the A-axis double-coupled synchronous gear sets is connected to the output end of the A-axis first reducer, and the other group of the A-axis double-coupled synchronous gear sets is connected to the output end of the A-axis second reducer.

[0013] Furthermore, the double forks of the double fork structure are respectively provided with a first bearing hole of the B-axis and a second bearing hole of the B-axis, the first bearing hole of the B-axis and the second bearing hole of the B-axis are coaxial, and the first bearing hole of the B-axis and the second bearing hole of the B-axis correspond to the B-axis driving part and the B-axis driven part respectively.

[0014] A B-axis slewing flange is rotatably arranged in the first bearing hole of the B-axis, and the B-axis secondary reducer drives the support frame to rotate via the B-axis slewing flange.

[0015] A B-shaft support flange is rotatably arranged in the second bearing hole of the B-shaft, and one end of the B-shaft support flange facing the first bearing hole of the B-shaft is fixedly connected to the support frame.

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

[0017] Furthermore, the support frame is provided with a first bearing hole of the A-axis and a second bearing hole of the A-axis, the first bearing hole of the A-axis and the second bearing hole of the A-axis are coaxial, and the first bearing hole of the A-axis and the second bearing hole of the A-axis correspond to the A-axis driving part and the A-axis driven part respectively.

[0018] An A-axis slewing flange is rotatably arranged in the first bearing hole of the A-axis, and the A-axis secondary reducer drives the main shaft assembly to rotate via the A-axis slewing flange.

[0019] An A-shaft support flange is rotatably arranged in the second bearing hole of the A-shaft, and one end of the A-shaft support flange facing the first bearing hole of the A-shaft is fixedly connected to the spindle assembly.

[0020] Furthermore, a slider and a nut are provided on the slide seat, a guide rail and a lead screw are provided on the Z axis of the five-axis horizontal flap machining center, the slider cooperates with the guide rail, and the nut and the lead screw are spirally transmitted.

[0021] Beneficial effects:

[0022] First, the present application sets a two-stage reducer to decelerate the motor, and amplifies the force through the two-stage reducer, which can provide a greater torque output than a direct-drive torque motor.

[0023] Second, the present application sets up two groups of motors to drive the driven wheels, and the two groups of motors drive them forward and reverse respectively, so as to eliminate the gear meshing clearance, avoid the return gap of a single motor and cause the empty return error, and improve the movement accuracy of the swing head.

[0024] Thirdly, both the A-axis assembly and the B-axis assembly adopt a double-fork structure, and the overall structure of the swing head is compact and highly rigid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a structural schematic diagram of a double swing head of an AB axis structure for a five-axis horizontal flap machining center disclosed by the present invention;

[0027] Figure 2 It is a structural schematic diagram of an AB-axis structure double-swing head support frame and a spindle assembly assembly for a five-axis horizontal panel turning machining center disclosed in the present invention;

[0028] Figure 3 It is a cross-sectional view of a double swing head of an AB axis structure for a five-axis horizontal flap machining center disclosed by the present invention;

[0029] Figure 4 It is a schematic diagram of the gear structure in a B-axis secondary reducer of an AB-axis structure double-swing head for a five-axis horizontal flap machining center disclosed by the present invention;

[0030] Figure 5 It is a cross-sectional view of a double-swing head support frame and a spindle assembly assembly of an AB-axis structure for a five-axis horizontal panel turning machining center disclosed in the present invention;

[0031] Figure 6 The present invention discloses a schematic diagram of the gear structure in an A-axis secondary reducer of an AB-axis structure double-swing head for a five-axis horizontal flap machining center.

[0032] 1. Sliding seat;

[0033] 2. Spindle assembly;

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

[0035] 4. A-axis secondary 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 secondary 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 rotary 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, first motor of B axis; 72, first reducer of B axis; 73, second motor of B axis; 74, second reducer of B axis;

[0039] 8. Slider;

[0040] 9. Silk mother. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] A double swing head with AB axis structure for a five-axis horizontal panel turning machining center, combined with Figure 1 and Figure 2 As shown, it includes: a slide 1 connected to the machine tool body, an A-axis assembly, a B-axis assembly and a spindle assembly 2; 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 driving part and the B-axis driven part of the B-axis assembly; a support frame 31 is rotatably connected between the B-axis driving part and the B-axis driven part, and the support frame 31 is respectively provided with the A-axis driving part and the A-axis driven part of the A-axis assembly, and the spindle assembly 2 is rotatably connected between the A-axis driving part and the A-axis driven part. The B-axis driving part is provided with a B-axis driving device, and the B-axis driving device includes: a B-axis first motor 71, a B-axis first reducer 72 and a B-axis secondary 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 secondary reducer 5 in turn. The A-axis driving part is provided with an A-axis driving device, which includes: an A-axis first motor 61, an A-axis first reducer 62 and an A-axis secondary reducer 4. The A-axis first motor 61 drives the spindle assembly 2 to rotate after being decelerated by the A-axis first reducer 62 and the A-axis secondary reducer 4. Both the A-axis assembly and the B-axis assembly have two reducers to decelerate the motor, and the two reducers are used to increase the force, so that a greater torque output can be provided than that of a direct-drive torque motor.

[0043] Preferably, the spindle assembly 2 includes an electric spindle and a spindle box, the electric spindle is installed in the spindle box, the spindle box rotates around the A axis driven by the output end of the A axis secondary reducer 4, and the spindle box drives the electric spindle to rotate synchronously. The spindle box can protect the electric spindle, and the spindle box can be installed with the transmission and speed change device of the electric spindle, so that the electric spindle can obtain various speeds to realize the main cutting motion.

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

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

[0046] Specifically, combined Figure 1 , Figure 3 and Figure 4 As shown, the B-axis secondary 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, and 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 B-axis double synchronous gear set and the B-axis driven wheel 54 form a secondary reducer for deceleration, and the output torque is increased by using the principle that the torque increases after the gear is decelerated, and the torque is output by the B-axis driven wheel 54.

[0047] Preferably, a first gear is installed at the output end of the first reducer 72 of the B-axis, and the first gear is meshed with the first synchronous gear 52 of the B-axis to realize the transmission of power from the first reducer 72 of the B-axis to the secondary reducer 5 of the B-axis; the number of teeth of the first synchronous gear 52 of the B-axis is greater than the number of teeth of the first gear, realizing secondary 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 of the B-axis and the second synchronous gear 53 of the B-axis are processed with corresponding keyways. The first synchronous gear 52 of the B-axis and the second synchronous gear 53 of the B-axis are sequentially sleeved and installed on the first drive shaft 51 of the B-axis to ensure that the first synchronous gear 52 of the B-axis and the second synchronous gear 53 of the B-axis are coaxial and rotate synchronously.

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

[0050] Specifically, combined Figure 1 , Figure 3 and Figure 4 As shown, the B-axis driving device also includes: a B-axis second motor 73 and a B-axis second reducer 74, and the output end of the B-axis second motor 73 is connected to the B-axis second reducer 74; the B-axis double-coupled synchronous gear set is divided into two groups, one group of the B-axis double-coupled synchronous gear sets is connected to the output end of the B-axis first reducer 72, and the other group of the B-axis double-coupled synchronous gear sets is connected to the output end of the B-axis second reducer 74.

[0051] During the positive stroke, the B-axis first motor 71 rotates forward to drive, so that the B-axis second synchronous gear 53 of the first group of B-axis double synchronous gear sets rotates, and the B-axis second synchronous gear 53 of the first group of B-axis double synchronous gear sets meshes with the B-axis driven wheel 54; at the same time, the B-axis driven wheel 54 meshes with the B-axis second synchronous gear 53 of the second group of B-axis double synchronous gear sets, and the B-axis driven wheel 54 pushes the B-axis second synchronous gear 53 of the second group of B-axis double synchronous gear sets to rotate; at this time, the meshing clearance between the B-axis second synchronous gear 53 of the first group of B-axis double synchronous gear sets and the B-axis driven wheel 54 along the positive stroke direction is zero, and the meshing clearance between the B-axis second synchronous gear 53 of the second group of B-axis double synchronous gear sets and the B-axis driven wheel 54 along the negative stroke direction is zero.

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

[0053] The B-axis first motor 71 and the B-axis second motor 73 are responsible for forward and reverse driving respectively, so as to eliminate the empty return caused by meshing clearance when a single motor is driving, ensure the accuracy of transmission, and improve the movement accuracy of the swing head around the B-axis.

[0054] Preferably, the B-axis first motor 71, the B-axis first reducer 72, the B-axis second motor 73 and the B-axis second reducer 74 are arranged outside the double fork structure, that is, on the side of the B-axis driving part away from the B-axis driven part. Since the length of the motor and the reducer is greater than their width, the motor and the reducer are arranged outside the double fork structure to avoid interference with the movement of the slide 1 and the support frame 31.

[0055] Specifically, combined Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the A-axis secondary 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, and 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. The A-axis double synchronous gear set and the A-axis driven wheel 44 form a secondary reducer for deceleration, and the output torque is increased by using the principle that the torque increases after the gear is decelerated, and the torque is output by the A-axis driven wheel 44.

[0056] Preferably, a second gear is installed at the output end of the first reducer 62 of the A-axis, and the second gear is meshed with the first synchronous gear 42 of the A-axis to realize the transmission of power from the first reducer 62 of the A-axis to the secondary reducer 4 of the A-axis; the number of teeth of the first synchronous gear 42 of the A-axis is greater than the number of teeth of the second gear, realizing secondary reduction.

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

[0058] Preferably, the A-axis driven wheel 44 is a sector gear, so that the overall structure of the A-axis secondary reducer 4 is more compact and the size is reduced.

[0059] Specifically, the A-axis driving device also 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-coupled synchronous gear set is two groups, one group of the A-axis double-coupled synchronous gear sets is connected to the output end of the A-axis first reducer 62, and the other group of the A-axis double-coupled synchronous gear sets is connected to the output end of the A-axis second reducer 64.

[0060] The positive and negative strokes of the A-axis drive device are the same as those of the B-axis drive device, and will not be described in detail here. The A-axis first motor 61 and the A-axis second motor 63 are responsible for the forward and reverse driving respectively, so as to eliminate the empty return caused by the meshing clearance when driving with a single motor, ensure the accuracy of the transmission, and improve the motion accuracy of the swing head rotating around the A-axis.

[0061] Preferably, a mounting plate 33 is fixedly provided on the side of the support frame 31 away from the spindle assembly 2, and the mounting plate 33 is located at the frame of the support frame 31 on the side of the A-axis driving part; the mounting plate 33 is fixed to the support frame 31 by screws. The A-axis first motor 61, the A-axis first reducer 62, the A-axis second motor 63 and the A-axis second reducer 64 are arranged on the side of the mounting plate 33 away from the A-axis driving part. The output ends of the A-axis first reducer 62 and the 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 the A-axis second reducer 64 are respectively meshed 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 motor and the reducer enables them to move together with the support frame 31, making full use of the space between the support frame 31 and the slide 1, avoiding the motor and the reducer from interfering with the connection between the slide 1 and the Z-axis of the machine tool when they are outside the A-axis driving part, or avoiding the motor and the reducer from interfering with the slide 1 due to length reasons when they are outside the A-axis driven part.

[0062] Specifically, combined Figure 1 and Figure 3 As shown, the double forks of the double fork structure are respectively provided with a first bearing hole of the B-axis and a second bearing hole of the B-axis, the first bearing hole of the B-axis and the second bearing hole of the B-axis are coaxial, and the first bearing hole of the B-axis and the second bearing hole of the B-axis correspond to the B-axis driving part and the B-axis driven part respectively. A B-axis rotating flange 55 is rotatably provided in the first bearing hole of the B-axis, and the B-axis secondary reducer 5 drives the support frame 31 to rotate through the B-axis rotating flange 55. A B-axis support flange 57 is rotatably provided in the second bearing hole of the B-axis, and the B-axis support flange 57 is fixedly connected to the support frame 31 at one end facing the first bearing hole of the B-axis. The B-axis secondary reducer realizes the output of torque through the B-axis rotating flange 55, and the B-axis rotating flange 55 drives the support frame 31 to rotate; the B-axis support flange 57 rotates following the rotation of the support frame 31, and the B-axis support flange 57 plays an auxiliary supporting role for the support frame 31.

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

[0064] Preferably, a B-axis turntable bearing 56 is installed between the B-axis swivel flange 55 and the first bearing hole of the B-axis to realize the rotational connection and radial positioning of the B-axis swivel flange 55 and the first bearing hole of the B-axis. One end of the B-axis turntable bearing 56 abuts against the positioning step in the first bearing hole of the B-axis, and the other end is pressed by the first bearing cover of the B-axis, thereby realizing the axial positioning of the B-axis swivel flange 55.

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

[0066] Specifically, a B-axis angle encoder 59 is provided on the double-fork structure, and the B-axis angle encoder 59 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 is fixed to the double-fork structure through a B-axis adapter flange; the inner ring is connected to the B-axis support flange 57 through a 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, combined Figure 1 , Figure 2 and Figure 5 As shown, the support frame 31 is provided with an A-axis first bearing hole and an A-axis second bearing hole, which are coaxial, and correspond to the A-axis driving part and the A-axis driven part, respectively. An A-axis swivel flange 45 is rotatably provided in the A-axis first bearing hole, and the A-axis secondary reducer 4 drives the spindle assembly 2 to rotate through the A-axis swivel flange 45. An A-axis support flange 47 is rotatably provided in the A-axis second bearing hole, and the A-axis support flange 47 is fixedly connected to the spindle assembly 2 at one end facing the A-axis first bearing hole. The A-axis secondary reducer 4 outputs torque through the A-axis swivel flange 45, and the A-axis swivel flange 45 drives the spindle assembly 2 to rotate; the A-axis support flange 47 rotates following the rotation of the spindle assembly 2, and the A-axis support flange 47 plays an auxiliary supporting role for the spindle assembly 2.

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

[0070] Preferably, an A-axis turntable bearing 46 is installed between the A-axis swivel flange 45 and the A-axis first bearing hole to realize the rotational connection and radial positioning of the A-axis swivel flange 45 and the A-axis first bearing hole. One end of the A-axis turntable 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 realizing the axial positioning of the A-axis swivel 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 to realize the rotational connection and radial positioning of 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 in the A-axis second bearing hole, and the other end is pressed by the A-axis second bearing cover, thereby realizing the axial positioning of the A-axis support flange 47.

[0072] Preferably, an A-axis angle encoder 32 is provided on the support frame 31, and the A-axis angle encoder 32 is used to measure the rotation angle of the A-axis support flange 47, so as to measure the rotation angle of the B-axis. The A-axis angle encoder 32 is an electromagnetic angle encoder, and the A-axis angle encoder 32 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 the A-axis adapter flange; the inner ring is connected to the A-axis support flange 47 through the 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, a slider 8 and a nut 9 are provided on the slide 1, and a guide rail and a lead screw are provided on the Z axis of the five-axis horizontal flap machining center; the slider 8 cooperates with the guide rail to achieve guidance; the nut 9 and the lead screw are spirally transmitted to achieve the linear motion of the slide 1 along the Z axis.

[0074] Preferably, the slider 8 and the nut 9 are arranged on the inner side of the slide 1. After the slider 8 and the nut 9 are connected to the guide rail and the lead screw on the machine tool, the swing head and the XYZ axis of the machine tool are combined to realize five-axis linkage processing.

[0075] The AB axis double swing head has the advantages of large torque, precise transmission and high rigidity, and is suitable for cavity processing of wall plate structural parts made of titanium alloy in the aerospace field. When completing the same processing features, the rotation angle of the A axis and B axis is smaller than the C axis rotation angle of the AC axis swing head. The simultaneous movement of the A axis and B axis saves time and can achieve rapid response.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements 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. An AB-axis structure double swing head for a five-axis horizontal flap machining center, comprising: A slide (1), an A-axis assembly, a B-axis assembly and a spindle assembly (2) connected to a machine tool body; 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 a B-axis driving part and a B-axis driven part of the B-axis assembly; a support frame (31) is rotatably connected between the B-axis driving part and the B-axis driven part, and the support frame (31) is respectively provided with the A-axis driving part and the A-axis driven part of the A-axis assembly, and the spindle assembly (2) is rotatably connected between the A-axis driving part and the A-axis driven part; The B-axis driving part is provided with a B-axis driving device, and the B-axis driving device comprises: a B-axis first motor (71), a B-axis first reducer (72), and a B-axis secondary 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 secondary reducer (5) in sequence; The A-axis driving part is provided with an A-axis driving device, and the A-axis driving device comprises: an A-axis first motor (61), an A-axis first reducer (62), and an A-axis secondary reducer (4). The A-axis first motor (61) drives the spindle assembly (2) to rotate after being decelerated by the A-axis first reducer (62) and the A-axis secondary reducer (4) in sequence.

2. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 1, characterized in that: The B-axis secondary reducer (5) comprises a B-axis double synchronous gear set and a B-axis driven wheel (54); the B-axis double synchronous gear set comprises: 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.

3. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 2, characterized in that: The B-axis driven wheel (54) is a sector gear.

4. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 2, characterized in that: The B-axis driving device also includes: a B-axis second motor (73) and a B-axis second reducer (74), wherein the output end of the B-axis second motor (73) is connected to the B-axis second reducer (74); the B-axis double synchronous gear set is divided into two groups, one group of the B-axis double synchronous gear set is connected to the output end of the B-axis first reducer (72), and the other group of the B-axis double synchronous gear set is connected to the output end of the B-axis second reducer (74).

5. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 1, characterized in that: The A-axis secondary reducer (4) comprises an A-axis double synchronous gear set and an A-axis driven wheel (44); the A-axis double synchronous gear set comprises: 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.

6. The AB-axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 5, characterized in that: The A-axis driving device also includes: an A-axis second motor (63) and an A-axis second reducer (64), wherein 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 is divided into two groups, one group of the A-axis double synchronous gear set is connected to the output end of the A-axis first reducer (62), and the other group of the A-axis double synchronous gear set is connected to the output end of the A-axis second reducer (64).

7. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 1, characterized in that: The double forks of the double fork structure are respectively provided with a first bearing hole of the B-axis and a second bearing hole of the B-axis, the first bearing hole of the B-axis and the second bearing hole of the B-axis are coaxial, and the first bearing hole of the B-axis and the second bearing hole of the B-axis correspond to the B-axis driving part and the B-axis driven part respectively; A B-axis rotary flange (55) is rotatably provided in the first bearing hole of the B-axis, and the B-axis secondary reducer (5) drives the support frame (31) to rotate via the B-axis rotary flange (55); A B-axis support flange (57) is rotatably provided in the second bearing hole of the B-axis, and one end of the B-axis support flange (57) facing the first bearing hole of the B-axis is fixedly connected to the support frame (31).

8. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 7, characterized in that: A B-axis angle encoder (59) is provided on the double-fork structure, and the B-axis angle encoder (59) is used to measure the rotation angle of the B-axis support flange (55).

9. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 1, characterized in that: The support frame (31) is provided with a first bearing hole of the A-axis and a second bearing hole of the A-axis, the first bearing hole of the A-axis and the second bearing hole of the A-axis are coaxial, and the first bearing hole of the A-axis and the second bearing hole of the A-axis correspond to the A-axis driving part and the A-axis driven part respectively; An A-axis rotary flange (45) is rotatably provided in the first bearing hole of the A-axis, and the A-axis secondary reducer (4) drives the main shaft assembly (2) to rotate via the A-axis rotary flange (45); An A-shaft supporting flange (47) is rotatably provided in the second bearing hole of the A-shaft, and one end of the A-shaft supporting flange (47) is fixedly connected to the main shaft assembly (2) toward the first bearing hole of the A-shaft.

10. The AB axis structure double swing head for a five-axis horizontal panel turning machining center according to claim 1, characterized in that: The slide seat (1) is provided with a slider (8) and a nut (9); the Z axis of the five-axis horizontal flap machining center is provided with a guide rail and a lead screw; the slider (8) cooperates with the guide rail, and the nut (9) and the lead screw are spirally transmitted.

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