CN118081404A - Vertical revolving stage of machining center - Google Patents
Vertical revolving stage of machining center Download PDFInfo
- Publication number
- CN118081404A CN118081404A CN202410259064.7A CN202410259064A CN118081404A CN 118081404 A CN118081404 A CN 118081404A CN 202410259064 A CN202410259064 A CN 202410259064A CN 118081404 A CN118081404 A CN 118081404A
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- Prior art keywords
- base
- oil
- gear
- revolving body
- encoder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 230000007704 transition Effects 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 56
- 230000003068 static effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention discloses a vertical turntable of a machining center, which comprises a platen, a base, a power supply mechanism, a brake mechanism, an angle encoder and a central oil outlet mechanism, wherein a central shaft and a rotating shaft are coaxially fixed at the bottom of the platen, the power supply mechanism comprises a motor, a transition plate, a first gear, a second gear, a variable-lead worm gear pair and a revolving body, the first gear is coaxially fixed on an output shaft of the motor and meshed with the second gear, the second gear is connected with the shaft of the worm through a key, the revolving body is respectively and fixedly connected with a worm wheel and the platen coaxially, a mounting seat is coaxially fixed at the bottom of the rotating shaft, the angle encoder and an encoder reading head thereof are fixed on the mounting seat, the brake mechanism is arranged between the revolving body and the base, and the central oil outlet mechanism is arranged on the central shaft. The turntable can ensure high precision and high stability in the transmission process, ensure working precision, realize high indexing and high positioning precision of the turntable and realize high-efficiency braking of the turntable while realizing high-load and high-rotation-speed power supply.
Description
Technical Field
The invention belongs to the field of machine manufacturing and automation, and particularly relates to a vertical turntable of a machining center.
Background
Five-axis linkage machining is a high pursuit of numerical control machining centers. With the rapid development of the die industry and the aerospace industry, the requirement for five-axis linkage processing is increasing. In order to meet the requirement of five-axis linkage processing, a vertical turntable can be added in a horizontal processing center, and the requirements of high precision, high-efficiency locking, braking, high tightness and the like can be met while the vertical turntable is required to transmit a large load, but the conventional vertical turntable cannot always completely meet the requirements.
The diameter of the table top of the vertical turntable of the conventional machining center is generally 100-200 mm, and the bearing capacity is limited. However, the vertical turntable with large load and large table top (more than 630 mm) is often dependent on import, and has higher price and higher user cost investment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the vertical turntable of the machining center, which can realize high-load and high-rotation-speed power supply, can ensure high precision and high stability in the transmission process, ensure the working precision of the turntable, realize high indexing and high positioning precision of the turntable and realize efficient braking of the turntable.
The technical scheme adopted for solving the technical problems is as follows: the vertical turntable of the machining center comprises a bedplate, a base, a power supply mechanism, a brake mechanism, an angle encoder and a central oil outlet mechanism, wherein the bedplate is vertically arranged on the front side of the base, a central shaft and a rotating shaft are coaxially and fixedly arranged on the rear side of the bedplate, the rotating shaft is sleeved on the outer side of the central shaft, the rotating shaft is arranged in the base through a bearing, the power supply mechanism comprises a motor, a transition plate, a first gear, a second gear, a variable-lead worm gear pair and a revolving body, the transition plate is fixedly arranged on the base, the motor is arranged on the transition plate, the first gear is coaxially and fixedly arranged on an output shaft of the motor, the first gear is meshed with the second gear, the second gear is coaxially and fixedly connected with a worm shaft in the variable-lead worm gear pair, the revolving body is coaxially and fixedly connected with the worm gear pair, the worm wheel is arranged in the base, the variable-lead worm gear pair is arranged in the base, the encoder is arranged at the position of the encoder, the encoder is arranged at the front end of the base, the encoder is arranged at the position of the base, the encoder is matched with the encoder, the encoder is arranged at the front end of the base, and the encoder is fixed with the encoder, the central oil outlet mechanism is arranged on the central shaft and is used for providing multiple paths of oil ways for the hydraulic clamp arranged on the bedplate.
When the vertical turntable of the machining center works, the revolving body is separated from the base, the power of the motor is transmitted to the variable-lead worm gear pair through the first gear and the second gear, the variable-lead worm gear pair drives the revolving body to rotate, the revolving body drives the platen to rotate, and the central oil outlet mechanism provides multiple paths of oil paths required by the working of the turntable. During braking, the rotary body and the base are relatively static through the braking mechanism.
The axial tooth thickness of the tooth part of the variable-lead worm gear pair is increased in a certain proportion along the axial direction, the tooth thickness of the worm gear is uniform, and under the conditions that the worm gear is worn and the tooth surface meshing gap is increased, the worm can be moved by a proper distance along the thinning direction of the axial tooth thickness of the worm gear so as to ensure high precision and high stability in the transmission process.
The rotating shaft, the bearing, the mounting seat and the angle encoder can realize full-closed-loop precision detection, and high indexing and high positioning precision of the turntable are realized.
Preferably, the braking mechanism comprises an oil cylinder, a first braking ring and a second braking ring, wherein the cylinder body of the oil cylinder and the first braking ring are respectively fixed on the revolving body, the piston of the oil cylinder and the second braking ring are respectively fixed on the base, the radial inner side of the first braking ring is positioned in front of a plane on the base, and the radial outer side of the second braking ring is positioned in front of the radial inner side of the first braking ring. When braking is needed, the piston drives the base to integrally move backwards, the second brake ring moves backwards along with the base, and when the second brake ring contacts and presses the first brake ring, the revolving body and the base are relatively static due to friction between the first brake ring and the second brake ring, so that the braking process of the revolving table is completed.
Preferably, a labyrinth ring is arranged between the transition plate and the output shaft of the motor, an oil seal is arranged between the labyrinth ring and the output shaft of the motor, a first sealing element is arranged between the labyrinth ring and the transition plate, a gland is fixed at the front end of the first gear through an expansion sleeve, and the gland is axially fixed with the first gear through a plurality of high-strength screws. The labyrinth ring, the oil seal and the first sealing piece can realize reliable sealing between the output shaft of the motor and the transition plate, and the sealing requirement in the load transmission process of the motor is met. The gland is fixed by adopting the mode that the expansion sleeve is combined with the high-strength screw, the structure is reliable, the axial fixation between the gland and the first gear is realized, and meanwhile, the pressure is provided for the expansion sleeve containing surface arranged between the gland and the first gear, so that the load transmission is realized through the cooperation of the pressure and the friction force.
Preferably, an oil separation plate is arranged between the radial outer side of the revolving body and the base, the oil separation plate is positioned in front of the variable-lead worm and gear pair, a second sealing element is arranged between the oil separation plate and the base, a third sealing element is arranged between the oil separation plate and the revolving body, and a dust-proof element is arranged between the bedplate and the base. The oil sump is used for containing lubricating oil for providing lubrication and cooling effects for the variable-lead worm gear pair, and the oil separation plate is matched with the second sealing piece and the third sealing piece, so that the sealing of the oil sump can be realized, and the lubricating oil is prevented from leaking outwards.
Preferably, the angle encoder and the encoder reading head used in cooperation with the angle encoder are fixed at the rear end of the mounting seat, a fourth sealing element is arranged between the mounting seat and the base, and a fifth sealing element is arranged between the mounting seat and the rotating shaft.
Preferably, the base is provided with an observation window, and the observation window faces to the tooth part of the worm. Due to the design of the observation window, operators can observe the meshing condition of the worm and the worm wheel in the variable-lead worm gear pair conveniently.
Preferably, the central shaft comprises a rotating part and a fixing part which are coaxially arranged, the fixing part is sleeved on the rear side of the rotating part, the rotating part is fixedly connected with the rear side of the bedplate, the rotating shaft is sleeved on the outer side of the rotating part, the fixing part is fixed on the rear side of the base, the central oil outlet mechanism comprises a flange plate, a plurality of transition joints, a plurality of annular oil grooves and a plurality of axial oil channels, the transition joints are arranged on the fixing part, the annular oil grooves are arranged in the fixing part, the plurality of axial oil channels are arranged in the rotating part, each transition joint is communicated with one axial oil channel through a plurality of annular oil grooves, and the plurality of axial oil channels provide a plurality of paths of oil channels for the hydraulic clamp arranged on the bedplate through the flange plate. The design of the central shaft can ensure connectivity and independence of each oil way when the turntable rotates to any circumferential position in the working process.
Compared with the prior art, the invention has the following advantages: the diameter of the bedplate of the vertical turntable of the machining center can reach more than 630mm, high precision and high stability in the transmission process can be ensured while high load and high rotation speed power supply are realized, the working precision of the turntable is ensured, the high indexing and high positioning precision of the turntable are realized, and the efficient braking of the turntable is realized.
Drawings
FIG. 1 is an elevation view of a machining center vertical turret in an embodiment;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 2;
FIG. 4 is a cross-sectional view of C-C of FIG. 2;
FIG. 5 is a schematic view of a power supply mechanism in an embodiment;
Specific reference numerals in the drawings are as follows:
1-platen, 11-center shaft, 12-spindle, 13-bearing, 14-mount, 15-fifth seal, 16-rotating part, 17-stationary part, 2-base, 21-oil sump, 22-oil baffle, 23-second seal, 24-third seal, 25-dust guard, 26-fourth seal, 27-observation window, 31-motor, 32-transition plate, 33-first gear, 34-second gear, 35-variable lead worm gear pair, 36-worm, 37-worm gear, 38-revolution, 39-motor output shaft, 4-cylinder, 41-cylinder, 42-piston, 43-first brake ring, 44-second brake ring, 5-angle encoder, 61-labyrinth ring, 62-oil seal, 63-first seal, 64-gland, 65-expansion sleeve, 66-high strength screw, 71-flange, 72-transition joint, 73-annular oil groove, 74-axial oil gallery.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings. The devices or components not defined in the present invention are all conventional in the art.
The vertical turntable of the machining center of the embodiment, as shown in fig. 1 to 5, comprises a bedplate 1, a base 2, a power supply mechanism, a brake mechanism, an angle encoder 5 and a central oil outlet mechanism, wherein the bedplate 1 is vertically arranged at the front side of the base 2, a central shaft 11 and a rotating shaft 12 are coaxially fixed at the rear side of the bedplate 1, the rotating shaft 12 is sleeved outside the central shaft 11, the rotating shaft 12 is arranged in the base 2 through a bearing 13, the power supply mechanism comprises a motor 31, a transition plate 32, a first gear 33, a second gear 34, a variable-lead worm gear pair 35 and a revolving body 38, the transition plate 32 is fixed on the base 2 through screws, the motor 31 is arranged on the transition plate 32, the first gear 33 is coaxially fixed on an output shaft 39 of the motor 31, the first gear 33 is meshed with the second gear 34, the second gear 34 is connected with a shaft of a worm 36 in the variable-lead worm gear pair 35 through keys, the worm wheel 37 in the variable-lead worm gear pair 35 is fixedly connected with the revolving body 38 coaxially, the revolving body 38 is fixedly connected with the bedplate 1 coaxially, the variable-lead worm gear pair 35 is arranged in the base 2, an oil pool 21 matched with the variable-lead worm gear pair 35 is arranged in the base 2, the rear end of the rotating shaft 12 is coaxially fixed with the mounting seat 14, the front end of the mounting seat 14 is tightly propped against the inner ring of the bearing 13 forwards, the angle encoder 5 and the encoder reading head matched with the angle encoder 5 are fixed at the rear end of the mounting seat 14, the angle encoder 5 is used for reading the rotation angle of the bedplate 1, the brake mechanism is arranged between the revolving body 38 and the base 2 and is used for realizing the relative static of the revolving body 38 and the base 2, the central oil outlet mechanism is arranged on the central shaft 11, the central oil outlet mechanism is used for providing multiple oil paths for a hydraulic clamp (not shown in the figure) mounted on the bedplate 1.
In this embodiment, the braking mechanism includes an oil cylinder 4, a first braking ring 43 and a second braking ring 44, the cylinder body 41 and the first braking ring 43 of the oil cylinder 4 are respectively fixed on the revolving body 38 by screws, the piston 42 and the second braking ring 44 of the oil cylinder 4 are respectively fixed on the base 2 by screws, the radial inner side of the first braking ring 43 is located in front of a plane on the base 2, and the radial outer side of the second braking ring 44 is located in front of the radial inner side of the first braking ring 43.
In this embodiment, a labyrinth ring 61 is installed between the transition plate 32 and the output shaft 39 of the motor 31, an oil seal 62 is installed between the labyrinth ring 61 and the output shaft 39 of the motor 31, a first sealing member 63 is installed between the labyrinth ring 61 and the transition plate 32, a gland 64 is fixed at the front end of the first gear 33 through an expansion sleeve 65, and the gland 64 is axially fixed with the first gear 33 through a plurality of high-strength screws 66. An oil separation plate 22 is arranged between the radial outer side of the revolving body 38 and the base 2, the oil separation plate 22 is positioned in front of the variable-lead worm gear pair 35, a second sealing piece 23 is arranged between the oil separation plate 22 and the base 2, a third sealing piece 24 is arranged between the oil separation plate 22 and the revolving body 38, a dust-proof piece 25 is arranged between the bedplate 1 and the base 2, a fourth sealing piece 26 is arranged between the mounting seat 14 and the base 2, and a fifth sealing piece 15 is arranged between the mounting seat 14 and the rotating shaft 12. The base 2 is provided with the observation window 27, and the observation window 27 faces to the tooth part of the worm 36 so as to realize the dustproof requirement.
In this embodiment, the central shaft 11 includes a rotating portion 16 and a fixed portion 17 coaxially disposed, the fixed portion 17 is sleeved on the rear side of the rotating portion 16, the rotating portion 16 is fixedly connected with the rear side of the platen 1, the rotating shaft 12 is sleeved on the outer side of the rotating portion 16, the fixed portion 17 is fixed on the rear side of the base 2, the central oil outlet mechanism includes a flange 71, a plurality of transition joints 72, a plurality of annular oil grooves 73 and a plurality of axial oil channels 74, the plurality of transition joints 72 are mounted on the fixed portion 17, the plurality of annular oil grooves 73 are formed in the fixed portion 17, the plurality of axial oil channels 74 are formed in the rotating portion 16, each transition joint 72 is communicated with one axial oil channel 74 through a plurality of annular oil grooves 73, and the plurality of axial oil channels 74 provide a plurality of oil channels for a hydraulic fixture mounted on the platen 1 through the flange 71.
When the vertical turntable of the machining center works, the radial outer side of the second brake ring 44 is positioned in front of the radial inner side of the first brake ring 43 (namely, a gap is reserved between the second brake ring and the radial outer side of the second brake ring), the revolving body 38 is separated from the base 2, the power of the motor 31 is transmitted to the variable-lead worm gear pair 35 through the first gear 33 and the second gear 34, the variable-lead worm gear pair 35 drives the revolving body 38 to rotate, the revolving body 38 drives the platen 1 to rotate, and the central oil outlet mechanism provides multiple paths of oil paths required by the turntable to work. When braking is needed, the piston 42 drives the base 2 to integrally move backwards, the second brake ring 44 moves backwards along with the base 2, and when the second brake ring 44 contacts and presses the first brake ring 43, the revolving body 38 and the base 2 are relatively static due to friction between the first brake ring 43 and the second brake ring 44, so that the braking process of the turntable is completed.
Claims (7)
1. The vertical turntable of the machining center is characterized by comprising a bedplate, a base, a power supply mechanism, a brake mechanism, an angle encoder and a central oil outlet mechanism, wherein the bedplate is vertically arranged on the front side of the base, a central shaft and a rotating shaft are coaxially and fixedly arranged on the rear side of the bedplate, the rotating shaft is sleeved outside the central shaft, the rotating shaft is installed in the base through a bearing, the power supply mechanism comprises a motor, a transition plate, a first gear, a second gear, a variable-lead worm gear pair and a revolving body, the transition plate is fixedly arranged on the base, the motor is arranged on the transition plate, the first gear is coaxially and fixedly arranged on an output shaft of the motor, the first gear is meshed with the second gear, the second gear is connected with a shaft of a worm in the variable-lead worm gear pair through a key, the revolving body is coaxially and fixedly connected with the revolving body in the variable-lead worm gear pair, the worm gear pair is fixedly connected with the same with the coaxial, the worm wheel pair is fixedly arranged with the angle encoder, the encoder is arranged in the base, the encoder is arranged at the front end of the base, and is matched with the revolving body, the encoder is arranged at the front end of the base, and the encoder is matched with the base, the angle encoder is fixedly arranged at the front end of the revolving body, the central oil outlet mechanism is arranged on the central shaft and is used for providing multiple paths of oil ways for the hydraulic clamp arranged on the bedplate.
2. The machining center vertical turntable according to claim 1, wherein the brake mechanism comprises an oil cylinder, a first brake ring and a second brake ring, wherein a cylinder body of the oil cylinder and the first brake ring are respectively fixed on the revolving body, a piston of the oil cylinder and the second brake ring are respectively fixed on the base, a radial inner side of the first brake ring is positioned in front of a plane on the base, and a radial outer side of the second brake ring is positioned in front of a radial inner side of the first brake ring.
3. The vertical turntable of a machining center according to claim 1, wherein a labyrinth ring is installed between the transition plate and the output shaft of the motor, an oil seal is installed between the labyrinth ring and the output shaft of the motor, a first sealing element is installed between the labyrinth ring and the transition plate, a gland is fixed at the front end of the first gear through an expansion sleeve, and the gland is axially fixed with the first gear through a plurality of high-strength screws.
4. The vertical turntable of a machining center according to claim 1, wherein an oil separation plate is arranged between the radial outer side of the revolving body and the base, the oil separation plate is positioned in front of the variable-lead worm gear pair, a second sealing element is arranged between the oil separation plate and the base, a third sealing element is arranged between the oil separation plate and the revolving body, and a dust-proof element is arranged between the bedplate and the base.
5. The machining center vertical turntable according to claim 1, wherein the angle encoder and an encoder reading head used in cooperation with the angle encoder are fixed at the rear end of the mounting base, a fourth sealing element is arranged between the mounting base and the base, and a fifth sealing element is arranged between the mounting base and the rotating shaft.
6. The machining center vertical turntable according to claim 1, wherein the base is provided with an observation window, and the observation window faces the tooth part of the worm.
7. The vertical turntable of claim 1, wherein the central shaft comprises a rotating part and a fixing part which are coaxially arranged, the fixing part is sleeved on the rear side of the rotating part, the rotating part is fixedly connected with the rear side of the platen, the rotating shaft is sleeved on the outer side of the rotating part, the fixing part is fixed on the rear side of the base, the central oil outlet mechanism comprises a flange plate, a plurality of transition joints, a plurality of annular oil grooves and a plurality of axial oil passages, the transition joints are arranged on the fixing part, the annular oil grooves are formed in the fixing part, the plurality of axial oil passages are formed in the rotating part, each transition joint is communicated with one axial oil passage through a plurality of annular oil grooves, and the plurality of axial oil passages are provided to a hydraulic clamp arranged on the platen through the flange plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410259064.7A CN118081404A (en) | 2024-03-07 | 2024-03-07 | Vertical revolving stage of machining center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410259064.7A CN118081404A (en) | 2024-03-07 | 2024-03-07 | Vertical revolving stage of machining center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118081404A true CN118081404A (en) | 2024-05-28 |
Family
ID=91147517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410259064.7A Pending CN118081404A (en) | 2024-03-07 | 2024-03-07 | Vertical revolving stage of machining center |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118081404A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120587960A (en) * | 2025-08-06 | 2025-09-05 | 宁波哈元自动化科技有限公司 | A horizontal CNC turntable |
-
2024
- 2024-03-07 CN CN202410259064.7A patent/CN118081404A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120587960A (en) * | 2025-08-06 | 2025-09-05 | 宁波哈元自动化科技有限公司 | A horizontal CNC turntable |
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