A high-precision cam roller type CNC rotary table

Abstract

This invention discloses a high-precision cam roller type CNC rotary table, belonging to the field of CNC machine tool technology. The high-precision cam roller type CNC rotary table includes a worktable, a rotary table, a vibration damping component, and a drive component. The rotary table is disposed on the upper side of the worktable, and a rotating shaft is connected to the lower side of the rotary table, with a gap between the rotary table and the worktable. The upper side of the rotating shaft is fixedly connected to the lower side of the rotary table, and the lower side of the rotating shaft is rotatably connected to the worktable. The drive component is disposed within the worktable, and the rotating shaft rotates under the drive component. The vibration damping component includes a rotating shaft nozzle and a rotary table nozzle. The rotating shaft nozzles are arranged circumferentially on the outer side of the rotating shaft. The rotary table nozzle is disposed in the middle of the rotary table. The rotating shaft nozzle and the rotary table nozzle can receive and emit water flow. This allows for the absorption of energy generated by the rotary table vibration during processing through liquid absorption, thereby reducing and suppressing the vibration experienced by the rotary table and improving the precision of CNC rotary table processing.

Description

Technical Field

[0001] This invention belongs to the field of CNC machine tool technology, and more specifically, relates to a high-precision cam roller type CNC rotary table. Background Technology

[0002] The CNC rotary table is one of the key functional components of a CNC machine tool. It primarily works in conjunction with the CNC machine tool to complete various functions, ensuring the full utilization of the machine tool's basic capabilities, expanding its technological performance and application range, ensuring machining accuracy, improving production efficiency, and reducing labor intensity. The manufacturing and application of five-axis machining centers is an important standard for measuring a country's manufacturing level, highlighting the critical importance of the CNC rotary table as a functional component of industrial machine tools.

[0003] Typically, CNC rotary tables are driven by servo motors. Power is transmitted through a mechanical transmission structure to rotate the worktable, which is used to fix the workpiece for machining. In actual operation, the entry and exit sections of the curved cam of a cam-roller rotary table are prone to impact, causing noise and table vibration. This vibration affects the machining accuracy of the parts. Current CNC rotary tables increase the thickness and connection strength of the rotary table components to suppress vibration. However, this method does not eliminate vibration energy; instead, it relies on the rotary table itself to absorb the vibration energy. Over time, this leads to a decrease in rotary table accuracy, a reduction in its service life, and an impact on machining quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-precision cam roller type CNC rotary table, which can absorb the energy generated by the vibration of the rotary table during processing through liquid absorption, thereby reducing and suppressing the vibration of the rotary table and improving the precision of CNC rotary table processing.

[0005] This invention discloses a high-precision cam-roller type CNC rotary table, comprising a worktable, a rotary table, a vibration damping assembly, and a drive assembly. The rotary table is disposed on the upper side of the worktable, and a rotating shaft is connected to the lower side of the rotary table, with a gap between the rotary table and the worktable. The upper side of the rotating shaft is fixedly connected to the lower side of the rotary table, and the lower side of the rotating shaft is rotatably connected to the worktable. The drive assembly is disposed within the worktable, and the rotating shaft rotates under the drive assembly. The vibration damping assembly includes a rotating shaft nozzle and a rotary table nozzle. The rotating shaft nozzles are arranged circumferentially on the outer side of the rotating shaft. The rotary table nozzle is disposed in the middle of the rotary table. The rotating shaft nozzle and the rotary table nozzle are capable of receiving and emitting water flow.

[0006] As a further improvement of the present invention, the drive assembly includes a roller output shaft, an arc-shaped cam, and a cam motor. The upper side of the roller output shaft is fixedly connected to the lower side of the rotating shaft. Needle roller bearings are evenly arranged on the side of the roller output shaft. The arc-shaped cam cooperates with the roller output shaft and the needle roller bearings. The cam motor is disposed inside the worktable, and the output end of the cam motor is fixedly connected to the arc-shaped cam to drive the arc-shaped cam.

[0007] As a further improvement of the present invention, a connecting shaft is provided on the lower side of the roller output shaft. A water pipe connector is provided at the center of the connecting shaft, the water pipe connector passing through the worktable and the turntable, and communicating with the rotating shaft nozzle and the turntable nozzle.

[0008] As a further improvement of the present invention, a flow-dividing hole is provided at the center of the turntable surface. The size of the flow-dividing hole matches that of the turntable nozzle to accommodate the nozzle. Flow-guiding holes are provided at equal intervals around the outer circumference of the flow-dividing hole, and the flow-guiding holes are connected to the flow-dividing hole. A T-slot is correspondingly provided on the outer side of each flow-guiding hole, extending to the outer side of the turntable, and the inner side of the T-slot is connected to the flow-guiding hole.

[0009] As a further improvement of the present invention, a flow-dividing groove is also provided annularly on the surface of the turntable. The flow-dividing groove has a circular structure and is coaxial with the flow-dividing hole. The path formed by the flow-dividing groove passes through the T-shaped groove.

[0010] As a further improvement of the present invention, the number of diversion channels is at least one, and the radius of the diversion channel is located between the radius of the circle formed on the inner side of the T-slot and the radius of the circle on the outer side of the turntable.

[0011] As a further improvement of the present invention, the shock-absorbing assembly also includes a shock-absorbing channel. The shock-absorbing channel is arranged in a ring on the outer side of the rotating shaft, and the inner sidewall of the shock-absorbing channel is fixedly connected to the outer side of the rotating shaft. The shock-absorbing channel and the rotating shaft cooperate to form a path for water flow.

[0012] As a further improvement of the present invention, the damping channel also includes a flow port. The flow port is located on the outside of the damping channel and is connected to the damping channel.

[0013] As a further improvement of the present invention, a pressure boosting device is also provided inside the shock absorption channel, which can radially increase the pressure inside the shock absorption channel towards the center of the rotating shaft.

[0014] As a further improvement of the present invention, an anti-rust coating is provided on the outer side of the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By setting up a vibration damping component, water is injected into the gap between the worktable and the turntable through the spindle nozzle during processing, and water is injected into the T-slot through the turntable nozzle. The water absorbs the energy generated by the turntable vibration during processing, which can reduce the impact of vibration on the processing of parts and improve the processing accuracy of the CNC turntable.

[0017] 2. By setting up a diversion channel, the water injected from the rotary table nozzle can flow better in the T-slot. The water with better flow can absorb the energy generated by vibration more efficiently, which can make the overall vibration reduction effect of the CNC rotary table better.

[0018] 3. By setting up a shock-absorbing channel, the water flow sprayed from the nozzle of the rotating shaft can flow stably on the outside of the rotating shaft. The pressurization device radially increases the pressure inside the shock-absorbing channel at the center of the rotating shaft, and the water flows out uniformly from the flow outlet, which improves the efficiency of water flow in absorbing vibration. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the arc-shaped cam and roller output shaft structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure in a specific embodiment two of the present invention;

[0023] Figure 5 This is a schematic diagram of the shock absorption channel in a specific embodiment three of the present invention;

[0024] Figure 6 This is a cross-sectional view of the shock absorption channel in a specific embodiment three of the present invention.

[0025] Explanation of the labels in the diagram:

[0026] Workbench 1, Turntable 2, Rotary shaft 3, Roller output shaft 4, Arc cam 5, Cam motor 6, Needle roller bearing 7, Connecting shaft 8, Water pipe connector 9, Rotary shaft nozzle 10, T-slot 11, Diverting hole 12, Guide hole 13, Turntable nozzle 14, Diverting groove 15, Vibration damping channel 16, Flow port 17. Detailed Implementation

[0027] Specific Implementation Example 1: Please refer to... Figure 1-3 A high-precision cam roller type CNC rotary table includes a worktable 1, a rotary table 2, a vibration damping assembly, and a drive assembly. Rotary shafts are provided on the left and right sides of the worktable 1, with their inner sides fixedly connected to the left and right sides of the worktable 1 respectively, to drive the worktable 1 to rotate. The rotary table 2 is located on the upper side of the worktable 1, and a rotating shaft 3 is connected to the lower side of the rotary table 2, with a gap between the rotary table 2 and the worktable 1. The radius of the rotating shaft 3 is smaller than that of the rotary table 2, and the rotary table 2 extends beyond the rotating shaft 3. The upper side of the rotating shaft 3 is fixedly connected to the lower side of the rotary table 2, and the lower side of the rotating shaft 3 is rotatably connected to the worktable 1. The upper part of the rotating shaft 3 extends out of the upper side of the worktable 1, and the lower part is nested in the lower side of the worktable 1. The workpiece is fixedly mounted on the front side of the rotary table 2.

[0028] The vibration damping assembly includes rotating nozzles 10. A plurality of rotating nozzles 10 are arranged circumferentially on the outer side of the rotating shaft 3. The rotating nozzles 10 are evenly spaced to allow water to flow uniformly between the gaps. The rotating nozzles 10 can receive and emit water. The rotating nozzles 10 emit water towards the gap between the worktable 1 and the turntable 2, filling the gap. The water flowing between the gaps absorbs the energy generated by the vibration of the worktable 1. After absorbing the vibration, the water flows out from the gap onto the worktable 1.

[0029] The drive assembly is located within the worktable 1, and the rotating shaft 3 is driven by the drive assembly to rotate. The drive assembly includes a roller output shaft 4, an arc-shaped cam 5, and a cam motor 6. The upper side of the roller output shaft 4 is fixedly connected to the lower side of the rotating shaft 3. Needle roller bearings 7 are evenly arranged on the side of the roller output shaft 4. The arc-shaped cam 5 cooperates with the roller output shaft 4 and the needle roller bearings 7. The cam motor 6 is located inside the worktable 1, and its output end is fixedly connected to the arc-shaped cam 5 to drive the arc-shaped cam 5. During operation, the cam motor 6 drives the cam groove surface on the arc-shaped cam 5 to engage with the outer surface of the needle roller bearings 7 on the roller output shaft 4 in a line contact, thereby driving the output shaft to rotate.

[0030] A connecting shaft 8 is provided on the lower side of the roller output shaft 4. The connecting shaft 8 rotates coaxially with the roller output shaft 4, and the upper side of the connecting shaft 8 is fixedly connected to the lower side of the roller output shaft 4. A water pipe connector 9 is provided at the center of the connecting shaft 8. The water pipe connector 9 passes through the worktable 1 and the turntable 2 and is connected to the rotating shaft nozzle 10. The water pipe connector 9 is connected to an external water supply system, which continuously supplies water to the rotating shaft nozzle 10.

[0031] Specific Implementation Example 2: Please refer to Figure 4 A high-precision cam roller type CNC rotary table is disclosed in this embodiment, which differs from the first embodiment in that a rotary table nozzle 14 is also provided at the center of the rotary table 2. A flow-diverting hole 12 is opened at the center of the surface of the rotary table 2, and the size of the flow-diverting hole 12 matches that of the rotary table nozzle 14 to accommodate the rotary table nozzle 14. The flow-diverting hole 12 penetrates through the rotary table 2. The bottom of the rotary table nozzle 14 is connected to a water pipe interface 9 to deliver water flow. A water outlet is provided on the upper side of the rotary table nozzle 14, and a water pipe is provided outside the water outlet to deliver water flow.

[0032] A plurality of guide holes 13 are evenly spaced around the outer circumference of the diversion hole 12, and the guide holes 13 are connected to the diversion hole 12. Each guide hole 13 has a corresponding T-slot 11 on its outer side, with a one-to-one correspondence between the guide hole 13 and the T-slot 11. The T-slot 11 extends to the outer side of the turntable 2, with its outermost edge penetrating the turntable 2, and its inner side connected to the guide hole 13. The outlet of the corresponding turntable nozzle 14, the guide hole 13, and the T-slot 11 are all located on the same straight line. A diversion groove 15 is also annularly arranged on the surface of the turntable 2. The diversion groove 15 has a circular structure and is coaxial with the diversion hole 12. The path formed by the diversion groove 15 penetrates the T-slot 11. There is at least one diversion groove 15. Preferably, there are two diversion grooves 15. The radius of the diversion groove 15 is between the radius of the circle formed by the inner side of the T-slot 11 and the radius of the outer circle of the turntable 2. The diversion channel 15 connects the T-shaped channels 11 to each other. The water flowing in the T-shaped channels 11 not only fills the T-shaped channels 11, but also generates a turbulent effect through the diversion channel 15, which facilitates the diffusion of energy in the water flow and improves the shock absorption effect.

[0033] Working principle:

[0034] When machining parts, the external water supply system delivers water from the water pipe interface 9 to the connected rotary nozzle 10 and rotary table nozzle 14. The rotary nozzle 10, located between the rotary table 2 and the worktable 1, emits water into the gap between the worktable 1 and the rotary table 2. The water flowing through the gap absorbs the energy generated by the vibration of the worktable 1. After absorbing the vibration, the water flows out from the gap onto the worktable 1. The outlet of the rotary table nozzle 14 delivers water into the T-slot 11 it is connected to. The diversion channel 15 connects the T-slots 11 to each other. The water flowing in the T-slots 11 not only fills the T-slots 11, but also generates a turbulent effect through the diversion channel 15, which facilitates the diffusion of energy in the water flow and improves the vibration reduction effect.

[0035] Specific Implementation Example 3: Please refer to Figure 5-6A high-precision cam roller type CNC rotary table is disclosed in this embodiment, which differs from the second embodiment in that it also includes a vibration damping channel 16. The vibration damping assembly further includes the vibration damping channel 16. The vibration damping channel 16 has a circular annular structure, with its inner radius slightly larger than the radius of the rotating shaft 3. The vibration damping channel 16 is annularly arranged on the outside of the rotating shaft 3, and its inner sidewall is fixedly connected to the outside of the rotating shaft 3. The rotating shaft nozzle 10, located on the rotating shaft 3, is situated within the hollow portion of the vibration damping channel 16. The vibration damping channel 16 and the rotating shaft 3 cooperate to form a water flow path, constituting a relatively enclosed space. The vibration damping channel 16 also includes a flow port 17. The flow port 17 is located on the outside of the vibration damping channel 16, communicating with it and extending beyond its outer side. Water flowing from the rotating shaft nozzle 10 passes through the annular path of the vibration damping channel 16 and flows out from the flow port 17. A pressure boosting device is also provided on the inner side of the shock-absorbing channel 16. This device radially increases the internal pressure of the shock-absorbing channel 16 towards the center of the rotating shaft 3. In this embodiment, the pressure boosting device is a booster pump, which is powered by an external power source. The booster pump applies radial pressure towards the outer surface of the rotating shaft 3 to the water flowing within the shock-absorbing channel 16, making the water flow more tightly contacted with the outer surface of the rotating shaft 3 and improving the shock-absorbing efficiency of the water flow within the shock-absorbing channel 16. A rust-proof coating is provided on the outer side of the rotating shaft 3 to increase the overall lifespan of the device.

Claims

1. A high-precision cam roller type numerical control rotary table, characterized by: The system includes a worktable (1), a turntable (2), a shock-absorbing component, and a drive component. The turntable (2) is located on the upper side of the worktable (1), and a rotating shaft (3) is connected to the lower side of the turntable (2). There is a gap between the turntable (2) and the worktable (1). The upper side of the rotating shaft (3) is fixedly connected to the lower side of the turntable (2), and the lower side of the rotating shaft (3) is rotatably connected to the worktable (1). The drive component is located inside the worktable (1), and the rotating shaft (3) is driven by the drive component to rotate. The shock-absorbing component includes a rotating shaft nozzle (10) and a turntable nozzle (14). The rotating shaft nozzle (10) is arranged circumferentially on the outside of the rotating shaft (3). The turntable nozzle (14) is located in the middle of the turntable (2). The rotating shaft nozzle (10) and the turntable nozzle (14) can receive and emit water flow. A flow divider hole (12) is provided at the center of the surface of the turntable (2). The flow divider hole (12) is matched with the size of the turntable nozzle (14) to accommodate the turntable nozzle (14). A guide hole (13) is provided at equal intervals on the outer circumference of the flow divider hole (12). The guide hole (13) is connected to the flow divider hole (12). A T-slot (11) is provided on the outer side of each guide hole (13). The T-slot (11) extends to the outer side of the turntable (2). The inner side of the T-slot (11) is connected to the guide hole (13). The surface of the turntable (2) is also provided with a flow divider (15) in an annular shape; the flow divider (15) is a circular structure and the flow divider (15) is coaxial with the flow divider (12); The path formed by the diversion channel (15) passes through the T-shaped channel (11); The number of diversion channels (15) is at least one, and the radius of the diversion channel (15) is between the radius of the circle formed inside the T-slot (11) and the radius of the circle outside the turntable (2); The damping assembly also includes a damping channel (16); the damping channel (16) is arranged in a ring on the outside of the rotating shaft (3), and the inner wall of the damping channel (16) is fixedly connected to the outside of the rotating shaft (3); the damping channel (16) and the rotating shaft (3) cooperate to form a path for water flow. The damping channel (16) also includes a flow port (17); the flow port (17) is located outside the damping channel (16) and is connected to the damping channel (16).

2. The high-precision cam roller type numerical control rotary table according to claim 1, characterized in that: The drive assembly includes a roller output shaft (4), an arc cam (5), and a cam motor (6); the upper side of the roller output shaft (4) is fixedly connected to the lower side of the rotating shaft (3); needle roller bearings (7) are evenly arranged on the side of the roller output shaft (4); the arc cam (5) cooperates with the roller output shaft (4) and the needle roller bearings (7); the cam motor (6) is located inside the worktable (1), and the output end of the cam motor (6) is fixedly connected to the arc cam (5) to drive the arc cam (5).

3. The high-precision cam roller type numerical control rotary table according to claim 2, characterized in that: A connecting shaft (8) is provided on the lower side of the roller output shaft (4); a water pipe joint (9) is provided at the center of the connecting shaft (8), the water pipe joint (9) passes through the worktable (1) and the turntable (2), and is connected to the rotating shaft nozzle (10) and the turntable nozzle (14).

4. The high-precision cam roller type numerical control rotary table according to claim 1, characterized in that: A pressure boosting device is also provided inside the shock absorption channel (16). The pressure boosting device can increase the pressure inside the shock absorption channel (16) radially to the center of the rotating shaft (3).

5. The high-precision cam roller type numerical control rotary table according to claim 1, characterized in that: The outer side of the rotating shaft (3) is provided with an anti-rust coating.

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