CN112171350A - B-axis swing head for vertical machining center - Google Patents
B-axis swing head for vertical machining center Download PDFInfo
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- CN112171350A CN112171350A CN202010913230.2A CN202010913230A CN112171350A CN 112171350 A CN112171350 A CN 112171350A CN 202010913230 A CN202010913230 A CN 202010913230A CN 112171350 A CN112171350 A CN 112171350A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/10—Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means
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Abstract
The invention discloses a B-axis swing head for a vertical machining center, which comprises a spindle box, a spindle, a front bearing assembly, a brake assembly, a torque motor unit, a rear bearing assembly and a drag chain unit, wherein the front end of the spindle is fixed on the spindle box, the drag chain unit is fixed at the rear end of the spindle, the front bearing assembly and the brake assembly are respectively sleeved at the front end of the spindle, the rear bearing assembly is sleeved at the rear end of the spindle, the torque motor unit comprises a first torque motor and a second torque motor which are used for providing driving force for the spindle, the first torque motor and the second torque motor are arranged between the front bearing assembly and the rear bearing assembly in series, and the first torque motor and the second torque motor are respectively sleeved on the spindle. The B-axis swinging head has a compact structure, can provide enough torsional force and high dynamic characteristics for the main shaft in a power-on state, improves the rotating speed and the processing efficiency of the main shaft, can make the radial dimension of the whole B-axis swinging head more compact, and can be applied to occasions with strict requirements on the diameter and the space of a motor.
Description
Technical Field
The invention relates to a numerical control machine tool accessory, in particular to a B-axis swinging head for a vertical machining center.
Background
The B-axis swinging head for the vertical machining center is a common high-end numerical control machine tool accessory, and the vertical five-axis linkage machining center can be formed by matching with a rotary table. The driving mode of the B-axis swinging head on the market at present is mainly mechanical, the B-axis swinging head is generally driven by a worm gear or a gear rack, the rotating speed of the B-axis swinging head is generally low, and the dynamic characteristic is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a B-axis swinging head for a vertical machining center, which has a compact structure and high dynamic characteristic, aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a vertical for machining center B axle pendulum head, includes headstock, main shaft, preceding bearing assembly, braking subassembly, torque motor unit, back bearing assembly and tow chain unit, the front end of main shaft be fixed in the headstock on, the tow chain unit fix the rear end of main shaft, preceding bearing assembly with braking subassembly overlap respectively and establish the front end of main shaft, back bearing assembly cover establish the rear end of main shaft, torque motor unit including be used for to the main shaft provide the first torque motor and the second torque motor of drive power, first torque motor with second torque motor establish ties and set up preceding bearing assembly with back bearing assembly between, first torque motor with second torque motor overlap respectively and establish the main shaft on.
The B-axis swinging head for the vertical machining center adopts a double-torque motor series driving structure consisting of the first torque motor and the second torque motor to drive the main shaft, has compact structure, can provide enough torsional force and high dynamic characteristics for the main shaft in a power-on state, improves the rotating speed and the machining efficiency of the main shaft, simultaneously can enable the radial dimension of the whole B-axis swinging head to be more compact, and can be applied to occasions with strict requirements on the diameter and the space of the motor.
Preferably, the first torque motor comprises a first motor stator, a first rotor connecting disc and a first motor rotor, the second torque motor comprises a second motor stator, a second rotor connecting disc and a second motor rotor, a stator sleeve is fixed between the front bearing assembly and the rear bearing assembly, the first motor stator and the second motor stator are respectively fixed in the stator sleeve in a front-back interference fit manner, the first rotor connecting disc is sleeved and fixed on the main shaft through a screw, the first motor rotor is in centering fit with the first rotor connecting disc and is fixedly connected with the first rotor connecting disc through a screw, the second rotor connecting disc is sleeved and fixed on the main shaft through screws, and the second motor rotor is matched with the second rotor connecting disc in a centering mode and fixedly connected through screws.
As preferred, the front bearing subassembly include YRT bearing, front axle bearing, front bearing clamping ring and front bearing gland, the YRT bearing install the front axle bearing in, the front axle bearing with stator sleeve centering cooperation and through screw fixed connection, the one end of headstock be provided with the tang, the tang with the inner circle centering cooperation of YRT bearing, front bearing clamping ring cover establish the tang on and the axial compresses tightly the inner circle of YRT bearing, the front bearing clamping ring with the inner circle of YRT bearing pass through the fix with screw on the headstock, the excircle of front bearing gland with the outer lane of YRT bearing respectively with front axle bearing centering cooperation, the front bearing gland with the outer lane axial compression of YRT bearing fix on the front axle bearing, the front end of main shaft pass through the fix with screw on the headstock, the excircle of the front end of the spindle is matched with the spindle box in a centering way; the rear bearing assembly comprises a crossed roller bearing, a rear bearing seat, a spacer bush and a rear bearing gland, the crossed roller bearing is arranged in the rear bearing seat, the rear bearing seat is matched with the stator sleeve in a centering way and is fixedly connected with the stator sleeve through a screw, the inner ring of the crossed roller bearing is matched with the main shaft in a centering way, the front end and the rear end of the inner ring of the crossed roller bearing are respectively pressed by the spacer bush and a coder seat in a limiting way, the front end surface of the spacer bush is attached to the second rotor connecting disc, the coder seat is fixed on the main shaft in a threaded connection way, the rear side of the coder seat is provided with a dustproof cover, the dustproof cover is arranged at the rear end of the rear bearing seat and is sleeved on the main shaft, and the front end and the rear end of the outer ring of the crossed roller bearing are respectively pressed by the rear bearing seat and the rear bearing gland in a limiting way, the rear bearing gland is fixed on the rear bearing seat through a screw, the front end face of the first motor stator is attached to the stator sleeve, the rear end face of the first motor stator is attached to the front end face of the second motor stator, and the rear end face of the second motor stator is attached to the rear bearing seat.
Preferably, the brake assembly comprises a piston, an oil cylinder barrel, an oil cylinder cover, an inner brake pad and an outer brake pad, the oil cylinder cover is fixed on the front bearing seat through a screw, the oil cylinder barrel is fixed at the front end of the oil cylinder cover through a screw, the excircle of the piston is matched with the front bearing seat in a centering way, the piston is positioned at the front side of the oil cylinder cover and positioned at the outer side of the oil cylinder barrel, the piston can move back and forth, the piston, the oil cylinder barrel and the oil cylinder cover are enclosed to form a loosening oil cavity, a loosening oil way communicated with the loosening oil cavity is arranged in the stator sleeve, the oil cylinder cover and the oil cylinder barrel, a clamping oil cavity is enclosed by the piston and the oil cylinder cover, a clamping oil way communicated with the clamping oil cavity is arranged in the stator sleeve and the oil cylinder cover, the inner brake pad is fixed on the main shaft, the outer brake block is fixed on the front bearing seat, the front end face of the inner brake block is right opposite to the front bearing seat, the rear end face of the inner brake block is right opposite to the front end face of the outer brake block, and the rear end face of the outer brake block is right opposite to the front end face of the piston. The brake assembly adopts a hydraulic brake structure, and the stable brake of the B-axis swing head is realized through the fitting and deformation of the inner brake pad and the outer brake pad. The force forcing the inner and outer brake blocks to deform comes from the acting force of the hydraulic oil on the piston, and the piston can move back and forth under the action of the hydraulic oil. When the inner brake block and the outer brake block deform, the front end face of the inner brake block contacts with the front bearing seat, and the rear end face of the inner brake block contacts with the front end face of the outer brake block, so that double friction surfaces are formed. The design of the double friction surfaces can provide double locking torque under the condition that the volume of the B-axis swing head is limited, hydraulic braking with high locking force is realized, and the rigidity and the precision of fixed-angle processing in a vertical processing center can be ensured.
Preferably, the radial inboard front end and the rear end of interior brake block compress tightly by a labyrinth ring and an interior gland respectively, labyrinth ring centering cover establish the main shaft on, the preceding terminal surface of labyrinth ring with the main shaft laminating, labyrinth ring, interior brake block and interior gland three pass through the fix with screw on the main shaft, the radial outside preceding terminal surface of outer brake block with the front axle bearing laminating, the radial outside rear end surface of outer brake block with an external gland laminating, outer brake block with external gland both pass through the fix with screw on the front axle bearing.
Preferably, the unclamping oil passage comprises a first oil passage, a second oil passage and a third oil passage which are communicated in sequence, the first oil passage is arranged in the stator sleeve, the second oil passage is arranged in the oil cylinder cover, the third oil passage is arranged in the oil cylinder barrel, and the third oil passage is communicated with the unclamping oil chamber; the clamping oil way comprises a fourth oil way and a fifth oil way which are communicated, the fourth oil way is arranged in the stator sleeve, the fifth oil way is arranged in the oil cylinder cover, and the fifth oil way is communicated with the clamping oil cavity. When braking, the hydraulic oil of the braking oil path reaches the clamping oil cavity through the fourth oil path and the fifth oil path, the piston moves forwards to extrude the outer brake pad, so that the outer brake pad is elastically deformed and is attached to the inner brake pad, and a friction surface is formed; the piston further moves forward to press the outer brake pad and the inner brake pad to continuously deform until the inner brake pad is attached to the front bearing seat, so that another friction surface is formed, and the clamping action is realized. When the brake is released, hydraulic oil of the releasing oil way flows through the first oil way, the second oil way and the third oil way to reach the releasing oil cavity, the piston moves backwards at the moment and is separated from the outer brake pad, and finally the inner brake pad is separated from the outer brake pad to realize releasing action.
Preferably, a piston seal is arranged between the outer circle of the piston and the front bearing seat, a pull rod seal and a bidirectional piston seal are arranged between the inner circle of the piston and the oil cylinder barrel in the front and back direction, a first O-shaped sealing ring is arranged between the oil cylinder cover and the front bearing seat, a second O-shaped sealing ring and a third O-shaped sealing ring are arranged between the oil cylinder cover and the oil cylinder barrel in the front and back direction, and the third O-shaped sealing ring is positioned on the outer side of an inlet of the third oil path. The combination of the piston seal, the bidirectional piston seal, the first O-shaped sealing ring and the second O-shaped sealing ring can ensure the sealing performance of the clamping oil cavity; the combination of the bidirectional piston seal and the pull rod seal can ensure the tightness of the loosening oil cavity.
Preferably, the headstock be close to one side of front bearing seat seted up the annular, the annular with the coaxial setting of main shaft, front bearing seat the front end with the combination department of headstock be provided with axial labyrinth structure, axial labyrinth structure's rear side be provided with V type and seal, V type big envelope establish the headstock on, the front bearing gland the excircle with the front bearing seat between be provided with fourth O type sealing washer, the headstock with the inner circle of front bearing gland between be provided with fifth O type sealing washer, V type seal with fifth O type sealing washer around set up the front side of tang, the front bearing seat one side of being connected with the lathe be provided with sixth O type sealing washer. The ring groove can accumulate part of cooling water and scrap iron, so that the part of the cooling water and the scrap iron flow down along the circumference of the spindle box to realize first-stage sealing; the axial labyrinth structure can further block part of cooling water and scrap iron, and the rest of the cooling water and the scrap iron are blocked by the V-shaped block, so that secondary sealing is realized; the fourth O-shaped sealing ring and the fifth O-shaped sealing ring play a further role in blocking, and a complete sealing effect is achieved. In addition, the sixth O-shaped sealing ring can ensure the sealing performance of the torque motor unit.
Preferably, a dustproof ring is arranged between the dustproof cover and the main shaft, and a seventh O-shaped sealing ring is arranged between the rear bearing seat and the dustproof cover. The dust cover, the dust ring and the seventh O-shaped sealing ring can ensure the sealing performance of the rear end of the swinging head.
Preferably, the tow chain unit comprises a transition plate, a wire feeding cylinder, a pipeline, a tow chain support, a tow chain cover plate and a pipeline fixing plate, wherein the transition plate is fixed at the rear end of the main shaft through a screw, the wire feeding cylinder is fixed at the rear end of the transition plate through a screw, the tow chain support is fixed at the rear end of the wire feeding cylinder through a screw, the tow chain is surrounded on the tow chain support, one end of the tow chain is fixed on the tow chain support through a screw, the other end of the tow chain is fixed on the pipeline fixing plate, the tow chain cover plate and the pipeline fixing plate are respectively installed on the tow chain support, the tow chain cover plate is installed at one side of the tow chain support close to the machine tool, and the main shaft, the transition plate, the wire feeding cylinder and the tow chain support are all hollow cylinders with two ends communicated with each other, the front end of the pipeline is fixed on the spindle box, and the rear end of the pipeline sequentially passes through the spindle, the transition plate, the wire feeding cylinder and the inner hole of the drag chain support, enters one end of the drag chain, penetrates out of the other end of the drag chain and is finally fixed on the pipeline fixing plate. The difficulty of the pipeline running and routing inside the swing head lies in how to prevent the pipeline from twisting and pipeline breakage caused by the rotation of the spindle box, and in order to solve the problem, the pipeline running and routing inside the swing head adopts a drag chain form, and the spatial rotation motion of the pipeline is converted into the rotation of the drag chain around a B shaft, namely the rising and the falling of the drooping part of the drag chain, so that the safety of the pipeline is effectively protected. In the swing head, the drag chain cover plate plays a role in protection; the pipeline refers to a set of hydraulic pipes, air pipes, power lines and other pipelines penetrating through the interior of the swing head, and the pipeline rotates around the B axis along with the spindle box and the spindle in the machining process of the vertical machining center.
Compared with the prior art, the invention has the following advantages: the B-axis swinging head for the vertical machining center adopts a double-torque motor series driving structure consisting of the first torque motor and the second torque motor to drive the main shaft, has compact structure, can provide enough torsional force and high dynamic characteristics for the main shaft in a power-on state, improves the rotating speed and the machining efficiency of the main shaft, simultaneously can enable the radial dimension of the whole B-axis swinging head to be more compact, and can be applied to occasions with strict requirements on the diameter and the space of the motor.
Drawings
FIG. 1 is a schematic structural diagram of a B-axis pendulum head in the embodiment;
FIG. 2 is an enlarged view of FIG. 1 at A (with the addition of sealing structures such as piston seals to FIG. 1);
fig. 3 is an enlarged view of fig. 1 at B (a sealing structure such as a fourth O-ring is added to fig. 1);
FIG. 4 is an enlarged view of FIG. 1 at C (a seventh O-ring is added to FIG. 1);
FIG. 5 is a rear side view of the swing head of the B-axis in the embodiment.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The B-axis pendulum head for a vertical machining center of embodiment 1, as shown in the figure, includes a main spindle box 1, a main spindle 2, a front bearing assembly, a brake assembly, a torque motor unit, a rear bearing assembly, and a drag chain unit, a front end of the main spindle 2 is fixed on the main spindle box 1, the drag chain unit is fixed at a rear end of the main spindle 2, the front bearing assembly and the brake assembly are respectively sleeved at a front end of the main spindle 2, the rear bearing assembly is sleeved at a rear end of the main spindle 2, the torque motor unit includes a first torque motor and a second torque motor for providing a driving force to the main spindle 2, the first torque motor and the second torque motor are serially connected between the front bearing assembly and the rear bearing assembly, and the first torque motor and the second torque motor are.
In embodiment 1, the first torque motor includes a first motor stator 31, a first rotor connecting disc 32 and a first motor rotor 33, the second torque motor includes a second motor stator 41, a second rotor connecting disc 42 and a second motor rotor 43, a stator sleeve 5 is fixed between the front bearing assembly and the rear bearing assembly, the first motor stator 31 and the second motor stator 41 are respectively fixed in the stator sleeve 5 in a front-back interference fit manner, the first rotor connecting disc 32 is sleeved and fixed on the spindle 2 through screws, the first motor rotor 33 and the first rotor connecting disc 32 are in a centering fit and fixedly connected through screws, the second rotor connecting disc 42 is sleeved and fixed on the spindle 2 through screws, and the second motor rotor 43 and the second rotor connecting disc 42 are in a centering fit and fixedly connected through screws.
In embodiment 1, the front bearing assembly includes a YRT bearing, a front bearing seat 63, a front bearing press ring 64 and a front bearing press cover 65, the YRT bearing is installed in the front bearing seat 63, the front bearing seat 63 is in centering fit with the stator sleeve 5 and fixedly connected through a screw, one end of the main spindle box 1 is provided with a spigot 11, the spigot 11 is in centering fit with an inner ring 61 of the YRT bearing, the front bearing press ring 64 is sleeved on the spigot 11 and axially presses against the inner ring 61 of the YRT bearing, the front bearing press ring 64 and the inner ring 61 of the YRT bearing are fixed on the main spindle box 1 through screws, an outer circle of the front bearing press cover 65 and an outer circle 62 of the YRT bearing are respectively in centering fit with the front bearing seat 63, the front bearing press cover 65 axially presses against and fixes the outer circle 62 of the YRT bearing on the front bearing seat 63, the front end of the main spindle 2 is fixed on the main spindle box 1 through; the rear bearing assembly comprises a crossed roller bearing 71, a rear bearing seat 72, a spacer 73 and a rear bearing gland 74, the crossed roller bearing 71 is arranged in the rear bearing seat 72, the rear bearing seat 72 is in centering fit with the stator sleeve 5 and is fixedly connected with the stator sleeve through screws, the inner ring of the crossed roller bearing 71 is in centering fit with the main shaft 2, the front end and the rear end of the inner ring of the crossed roller bearing 71 are respectively limited and pressed by the spacer 73 and an encoder seat 75, the front end surface of the spacer 73 is attached to the second rotor connecting disc 42, the encoder seat 75 is fixed on the main shaft 2 in a threaded connection mode, the rear side of the encoder seat 75 is provided with a dustproof cover 76, the dustproof cover 76 is arranged at the rear end of the rear bearing seat 72 and is sleeved on the main shaft 2, the front end and the rear end of the outer ring of the crossed roller bearing 71 are respectively limited and pressed by the rear bearing seat 72 and the, the front end face of the first motor stator 31 is attached to the stator sleeve 5, the rear end face of the first motor stator 31 is attached to the front end face of the second motor stator 41, and the rear end face of the second motor stator 41 is attached to the rear bearing seat 72.
In embodiment 1, the brake assembly includes a piston 81, an oil cylinder 82, an oil cylinder cover 83, an inner brake pad 84 and an outer brake pad 85, the oil cylinder cover 83 is fixed on the front bearing seat 63 through screws, the oil cylinder 82 is fixed on the front end of the oil cylinder cover 83 through screws, the outer circle of the piston 81 is in centering fit with the front bearing seat 63, the piston 81 is located on the front side of the oil cylinder cover 83 and located on the outer side of the oil cylinder 82, the piston 81 can move back and forth, the piston 81, the oil cylinder 82 and the oil cylinder cover 83 enclose a release oil cavity 86, release oil passages communicated with the release oil cavity 86 are formed in the stator sleeve 5, the oil cylinder cover 83 and the oil cylinder cover 82, the piston 81 and the oil cylinder cover 83 enclose a clamping oil cavity 87, a clamping oil passage communicated with the clamping oil cavity 87 is formed in the stator sleeve 5 and the oil cylinder cover 83, the inner brake pad 84 is fixed on the main shaft 2, the outer brake pad 85 is fixed, the rear end face of the inner brake pad 84 faces the front end face of the outer brake pad 85, and the rear end face of the outer brake pad 85 faces the front end face of the piston 81. The front end and the rear end of the radial inner side of the inner brake pad 84 are respectively pressed by a labyrinth ring 88 and an inner gland 89, the labyrinth ring 88 is centered and sleeved on the main shaft 2, the front end face of the labyrinth ring 88 is attached to the main shaft 2, the labyrinth ring 88, the inner brake pad 84 and the inner gland 89 are fixed on the main shaft 2 through screws, the front end face of the radial outer side of the outer brake pad 85 is attached to the front bearing seat 63, the rear end face of the radial outer side of the outer brake pad 85 is attached to an outer gland 80, and the outer brake pad 85 and the outer gland 80 are fixed on the front bearing seat 63 through screws. The unclamping oil passage comprises a first oil passage 51, a second oil passage 52 and a third oil passage 53 which are communicated in sequence, the first oil passage 51 is arranged in the stator sleeve 5, the second oil passage 52 is arranged in the oil cylinder cover 83, the third oil passage 53 is arranged in the oil cylinder barrel 82, and the third oil passage 53 is communicated with an unclamping oil chamber 86; the clamping oil path comprises a fourth oil path 54 and a fifth oil path 55 which are communicated, the fourth oil path 54 is arranged in the stator sleeve 5, the fifth oil path 55 is arranged in the oil cylinder cover 83, and the fifth oil path 55 is communicated with the clamping oil chamber 87. A piston seal 91 is arranged between the outer circle of the piston 81 and the front bearing seat 63, a pull rod seal and a bidirectional piston seal 92 are arranged between the inner circle of the piston 81 and the oil cylinder barrel 82 in the front and back direction, a first O-shaped seal ring 93 is arranged between the oil cylinder cover 83 and the front bearing seat 63, a second O-shaped seal ring 94 and a third O-shaped seal ring 95 are arranged between the oil cylinder cover 83 and the oil cylinder barrel 82 in the front and back direction, and the third O-shaped seal ring 95 is positioned outside the inlet of the third oil path 53.
The B-axis pendulum head for the vertical machining center in embodiment 2 is different from embodiment 1 in that in embodiment 2, a ring groove 12 is formed in one side of a spindle box 1 close to a front bearing seat 63, the ring groove 12 is coaxially arranged with a spindle 2, an axial labyrinth structure 13 is arranged at a joint of a front end of the front bearing seat 63 and the spindle box 1, a V-shaped seal 14 is arranged on a rear side of the axial labyrinth structure 13, the V-shaped seal 14 is sleeved on the spindle box 1, a fourth O-shaped seal ring 96 is arranged between an outer circle of a front bearing gland 65 and the front bearing seat 63, a fifth O-shaped seal ring 97 is arranged between the spindle box 1 and an inner circle of the front bearing gland 65, the V-shaped seal 14 and the fifth O-shaped seal ring 97 are arranged on a front side of a spigot 11 in a front-back manner, and a sixth O-shaped seal ring 98 is; a dust ring 77 is provided between the dust cap 76 and the main shaft 2, and a seventh O-ring 99 is provided between the rear bearing seat 72 and the dust cap 76.
The B-axis pendulous device for the vertical machining center in embodiment 3 is different from embodiment 2 in that in embodiment 3, the drag chain unit includes a transition plate 101, a routing cylinder 102, a pipeline 103, a drag chain 104, a drag chain support 105, a drag chain cover plate 106 and a pipeline fixing plate 107, the transition plate 101 is fixed at the rear end of the main shaft 2 by screws, the routing cylinder 102 is fixed at the rear end of the transition plate 101 by screws, the drag chain support 105 is fixed at the rear end of the routing cylinder 102 by screws, the drag chain 104 surrounds the drag chain support 105, one end of the drag chain 104 is fixed at the drag chain support 105 by screws, the other end of the drag chain 104 is fixed at the pipeline fixing plate 107, the drag chain cover plate 106 and the pipeline fixing plate 107 are respectively installed at the drag chain support 105, the drag chain cover plate 106 is installed at the side of the drag chain support 105 close to the machine tool, the main shaft 2, the routing cylinder 102 and the drag chain support 105 are all hollow cylinders with two ends being conducted, the front end of the pipeline 103 is fixed on the main spindle box 1, and the rear end of the pipeline 103 passes through the main spindle 2, the transition plate 101, the routing cylinder 102 and the inner hole of the drag chain support 105 in sequence, enters one end of the drag chain 104, penetrates out from the other end of the drag chain 104 and is finally fixed on the pipeline fixing plate 107.
Claims (10)
1. A B-axis swing head for a vertical machining center is characterized by comprising a main shaft box, a main shaft, a front bearing assembly, a brake assembly, a torque motor unit, a rear bearing assembly and a drag chain unit, the front end of the main shaft is fixed on the main shaft box, the drag chain unit is fixed at the rear end of the main shaft, the front bearing assembly and the brake assembly are respectively sleeved at the front end of the main shaft, the rear bearing assembly is sleeved at the rear end of the main shaft, the torque motor unit includes a first torque motor and a second torque motor for providing a driving force to the spindle, said first torque motor and said second torque motor being disposed in series between said front bearing assembly and said rear bearing assembly, the first torque motor and the second torque motor are respectively sleeved on the main shaft.
2. The B-axis swinging head for the vertical machining center according to claim 1, the first torque motor comprises a first motor stator, a first rotor connecting disc and a first motor rotor, the second torque motor comprises a second motor stator, a second rotor connecting disc and a second motor rotor, a stator sleeve is fixed between the front bearing assembly and the rear bearing assembly, the first motor stator and the second motor stator are respectively fixed in the stator sleeve in a front-back interference fit manner, the first rotor connecting disc is sleeved and fixed on the main shaft through a screw, the first motor rotor is in centering fit with the first rotor connecting disc and is fixedly connected with the first rotor connecting disc through a screw, the second rotor connecting disc is sleeved and fixed on the main shaft through screws, and the second motor rotor is matched with the second rotor connecting disc in a centering mode and fixedly connected through screws.
3. The B-axis pendulum head for the vertical machining center according to claim 2, characterized in that, the front bearing assembly comprises a YRT bearing, a front bearing seat, a front bearing pressing ring and a front bearing pressing cover, the YRT bearing is installed in the front bearing seat, the front bearing seat is matched with the stator sleeve in a centering way and is fixedly connected with the stator sleeve through a screw, one end of the spindle box is provided with a spigot, the spigot is matched with the inner ring of the YRT bearing in a centering way, the front bearing pressing ring is sleeved on the spigot and axially presses the inner ring of the YRT bearing, the front bearing pressing ring and the inner ring of the YRT bearing are fixed on the spindle box through a screw, the outer circle of the front bearing pressing cover and the outer ring of the YRT bearing are respectively matched with the front bearing seat in a centering way, the front bearing pressing cover axially presses and fixes the outer ring of the YRT bearing on the front bearing seat, the front end of the main shaft is fixed on the main shaft box through a screw, and the excircle of the front end of the main shaft is matched with the main shaft box in a centering way; the rear bearing assembly comprises a crossed roller bearing, a rear bearing seat, a spacer bush and a rear bearing gland, the crossed roller bearing is arranged in the rear bearing seat, the rear bearing seat is matched with the stator sleeve in a centering way and is fixedly connected with the stator sleeve through a screw, the inner ring of the crossed roller bearing is matched with the main shaft in a centering way, the front end and the rear end of the inner ring of the crossed roller bearing are respectively pressed by the spacer bush and a coder seat in a limiting way, the front end surface of the spacer bush is attached to the second rotor connecting disc, the coder seat is fixed on the main shaft in a threaded connection way, the rear side of the coder seat is provided with a dustproof cover, the dustproof cover is arranged at the rear end of the rear bearing seat and is sleeved on the main shaft, and the front end and the rear end of the outer ring of the crossed roller bearing are respectively pressed by the rear bearing seat and the rear bearing gland in a limiting way, the rear bearing gland is fixed on the rear bearing seat through a screw, the front end face of the first motor stator is attached to the stator sleeve, the rear end face of the first motor stator is attached to the front end face of the second motor stator, and the rear end face of the second motor stator is attached to the rear bearing seat.
4. The B-axis yaw for the vertical machining center as claimed in claim 3, wherein the brake assembly comprises a piston, an oil cylinder barrel, an oil cylinder cover, an inner brake pad and an outer brake pad, the oil cylinder cover is fixed on the front bearing seat through screws, the oil cylinder barrel is fixed at the front end of the oil cylinder cover through screws, the outer circle of the piston is in centering fit with the front bearing seat, the piston is positioned at the front side of the oil cylinder cover and positioned at the outer side of the oil cylinder barrel, the piston can move back and forth, a loosening oil cavity is defined by the piston, the oil cylinder barrel and the oil cylinder cover, a loosening oil cavity communicated with the loosening oil cavity is formed in the stator sleeve, the oil cylinder cover and the oil cylinder barrel, a clamping oil cavity is defined by the piston and the oil cylinder cover, a clamping oil channel communicated with the clamping oil cavity is formed in the stator sleeve and the oil cylinder cover, the inner brake block is fixed on the main shaft, the outer brake block is fixed on the front bearing seat, the front end face of the inner brake block is right opposite to the front bearing seat, the rear end face of the inner brake block is right opposite to the front end face of the outer brake block, and the rear end face of the outer brake block is right opposite to the front end face of the piston.
5. The B-axis pendulum head for the vertical machining center as claimed in claim 4, wherein the front end and the rear end of the radial inner side of the inner brake pad are respectively compressed by a labyrinth ring and an inner gland, the labyrinth ring is centered and sleeved on the spindle, the front end surface of the labyrinth ring is attached to the spindle, the labyrinth ring, the inner brake pad and the inner gland are fixed to the spindle through screws, the front end surface of the radial outer side of the outer brake pad is attached to the front bearing seat, the rear end surface of the radial outer side of the outer brake pad is attached to an outer gland, and the outer brake pad and the outer gland are fixed to the front bearing seat through screws.
6. The B-axis yaw for a vertical machining center as claimed in claim 4, wherein the release oil path comprises a first oil path, a second oil path and a third oil path which are sequentially communicated, the first oil path is formed in the stator sleeve, the second oil path is formed in the cylinder head, the third oil path is formed in the cylinder barrel, and the third oil path is communicated with the release oil chamber; the clamping oil way comprises a fourth oil way and a fifth oil way which are communicated, the fourth oil way is arranged in the stator sleeve, the fifth oil way is arranged in the oil cylinder cover, and the fifth oil way is communicated with the clamping oil cavity.
7. The B-axis swinging head for the vertical machining center according to claim 6, wherein a piston seal is arranged between the outer circle of the piston and the front bearing seat, a pull rod seal and a bidirectional piston seal are arranged between the inner circle of the piston and the oil cylinder barrel from front to back, a first O-shaped seal ring is arranged between the oil cylinder cover and the front bearing seat, a second O-shaped seal ring and a third O-shaped seal ring are arranged between the oil cylinder cover and the oil cylinder barrel from front to back, and the third O-shaped seal ring is positioned outside an inlet of the third oil path.
8. The B-axis swinging head for the vertical machining center according to claim 3, a ring groove is arranged on one side of the spindle box close to the front bearing seat, the ring groove is coaxial with the spindle, an axial labyrinth structure is arranged at the joint of the front end of the front bearing seat and the spindle box, the back side of the axial labyrinth structure is provided with a V-shaped seal which is arranged on the main spindle box, a fourth O-shaped sealing ring is arranged between the excircle of the front bearing gland and the front bearing seat, a fifth O-shaped sealing ring is arranged between the spindle box and the inner circle of the front bearing gland, the V-shaped seal and the fifth O-shaped seal ring are arranged on the front side and the rear side of the spigot, and a sixth O-shaped seal ring is arranged on one side, connected with a machine tool, of the front bearing seat.
9. The B-axis swinging head for the vertical machining center according to claim 8, wherein a dust ring is arranged between the dust cover and the main shaft, and a seventh O-shaped sealing ring is arranged between the rear bearing seat and the dust cover.
10. The B-axis yaw for a vertical machining center according to claim 1, wherein the drag chain unit comprises a transition plate, a wire feeding cylinder, a wire, a drag chain support, a drag chain cover plate and a wire fixing plate, the transition plate is fixed at the rear end of the main shaft through a screw, the wire feeding cylinder is fixed at the rear end of the transition plate through a screw, the drag chain support is fixed at the rear end of the wire feeding cylinder through a screw, the drag chain surrounds the drag chain support, one end of the drag chain is fixed on the drag chain support through a screw, the other end of the drag chain is fixed on the wire fixing plate, the drag chain cover plate and the wire fixing plate are respectively installed on the drag chain support, the drag chain cover plate is installed at one side of the drag chain support close to the machine tool, the main shaft, the transition plate, the wire feeding cylinder and the drag chain support are all hollow cylinders with two communicated ends, the front end of the pipeline is fixed on the main shaft box, and the rear end of the pipeline sequentially penetrates through inner holes of the main shaft, the transition plate, the wire feeding cylinder and the drag chain support to enter one end of the drag chain, penetrates out of the other end of the drag chain and is finally fixed on the pipeline fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913230.2A CN112171350A (en) | 2020-09-03 | 2020-09-03 | B-axis swing head for vertical machining center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913230.2A CN112171350A (en) | 2020-09-03 | 2020-09-03 | B-axis swing head for vertical machining center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112171350A true CN112171350A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010913230.2A Pending CN112171350A (en) | 2020-09-03 | 2020-09-03 | B-axis swing head for vertical machining center |
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| Country | Link |
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| CN (1) | CN112171350A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059366A (en) * | 2021-03-25 | 2021-07-02 | 山东豪迈机械科技股份有限公司 | Numerical control rotary table and numerical control machine tool comprising same |
| CN117564307A (en) * | 2024-01-19 | 2024-02-20 | 山东豪迈数控机床有限公司 | Main shaft pipeline connection structure and lathe |
-
2020
- 2020-09-03 CN CN202010913230.2A patent/CN112171350A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059366A (en) * | 2021-03-25 | 2021-07-02 | 山东豪迈机械科技股份有限公司 | Numerical control rotary table and numerical control machine tool comprising same |
| CN117564307A (en) * | 2024-01-19 | 2024-02-20 | 山东豪迈数控机床有限公司 | Main shaft pipeline connection structure and lathe |
| CN117564307B (en) * | 2024-01-19 | 2024-04-05 | 山东豪迈数控机床有限公司 | Main shaft pipeline connection structure and lathe |
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