A high-precision five-axis machining center rotary table

Abstract

The present invention provides a high-precision five-axis machining center rotary table, comprising a base and a rotating disk rotatably connected to the base, the top of the rotating disk being evenly distributed with a plurality of T-slots, the base being provided with a motor stator, the rotating disk being provided with a motor rotor coupled to the motor stator, a rotating column being rotatably connected at the axis of the rotating disk, the sidewalls of the rotating column being evenly distributed with a plurality of injection holes corresponding to the T-slots one by one, a liquid inlet channel connected to the injection holes being formed at the axis of the rotating column, the liquid inlet channel being sealed and rotatably connected with a liquid inlet pipe, the liquid inlet pipe being integrally connected to the base; an inertial reciprocating structure being provided between the rotating column and the rotating disk, and when the rotating disk brakes, the inertial reciprocating structure being able to utilize the inertia of the rotating column to cause the rotating column to reciprocate relative to the rotating disk within a predetermined angle. The present invention can effectively flush away metal chips at the bottom corner of the T-slot near one end of the axis of the rotary table.

Description

Technical Field

[0001] The present invention relates to the technical field of machining centers, in particular to a high-precision five-axis machining center rotary table. Background Art

[0002] With the rapid development of modern manufacturing, the demand for machining parts with complex curved surfaces is increasing. Five-axis machining centers, capable of machining in multiple degrees of freedom, have become essential equipment for machining complex curved surfaces, playing a vital role in industries such as aerospace, scientific research precision instruments, and high-precision medical equipment.

[0003] The rotary table is one of the key components of the five-axis machining center. During the milling process of the workpiece, a mixture of milling fluid and metal chips will enter the T-slot on the rotary table and remain in the T-slot, which will adversely affect the installation of the fixture or fixture chuck. To solve this problem, the patent application number 202111517775.2 discloses a cradle turntable chip flushing structure, which enables the water in the sealed cavity to flow to the T-slot through the outlet channel, thereby flushing away the metal chips retained in the T-slot. However, given that the diameter of the outlet channel is much smaller than the width of the T-slot, a dead water area is easily formed at the bottom corner of the T-slot near one end of the rotary table axis. In addition, the viscosity of the fluid makes the water flow velocity near the slot wall lower, resulting in the metal chips at the bottom corner of the slot being difficult to be effectively flushed away, which makes it easy for metal chips to accumulate. Summary of the Invention

[0004] To overcome the deficiencies of the prior art, the present invention provides a high-precision five-axis machining center rotary table, which can effectively flush away metal chips at the bottom corner of the T-slot near one end of the rotary table axis.

[0005] The present invention adopts the following technical solutions.

[0006] A high-precision five-axis machining center rotary table comprises a base and a rotating disk rotatably connected to the base, wherein a plurality of T-slots are evenly distributed on the top of the rotating disk, a motor stator is provided on the base, and a motor rotor coupled to the motor stator is provided on the rotating disk;

[0007] The rotating disc is rotatably connected to a rotating column at its axis. The sidewalls of the rotating column are evenly distributed with a plurality of injection holes corresponding to the T-slots one by one. A liquid inlet channel connected to the injection holes is formed at the axis of the rotating column. The liquid inlet channel is sealed and rotatably connected to a liquid inlet pipe, which is integrally connected to the base.

[0008] An inertial reciprocating structure is provided between the rotating column and the rotating disk. When the rotating disk is braked, the inertial reciprocating structure can utilize the inertia of the rotating column to make the rotating column and the rotating disk reciprocate relative to each other within a predetermined angle.

[0009] When the rotating column is at the starting point of the stroke of reciprocating rotation relative to the rotating disk, the injection holes are aligned with the corresponding T-slots;

[0010] When the rotating column is at the end point of the stroke of the reciprocating rotation relative to the rotating disk, the injection hole is staggered with the corresponding T-slot.

[0011] Furthermore, the inertial reciprocating structure includes a spline ring integrally sleeved on the outer side of the rotating column, and a plurality of limit blocks are evenly distributed on the outer wall of the spline ring along its circumference;

[0012] The rotating disk is integrally connected with a spline key, which is rotatably sleeved on the outer side of the spline ring. A plurality of stop blocks cooperating with the limit blocks are evenly distributed on the inner side wall of the spline key along its circumference.

[0013] Furthermore, the limit block and the stop block are both permanent magnets;

[0014] A magnetic repulsive force is generated between the limiting blocks and the stop blocks adjacent to each other in the circumferential direction of the rotating disk;

[0015] The stop block is provided with a buffer pad which acts on the limit block.

[0016] Furthermore, the bottom end of the rotating column is integrally connected to a flywheel coaxial with the rotating column.

[0017] Furthermore, a diversion cavity is formed in the rotating column and is connected to the liquid inlet channel. The diversion cavity is connected to the injection hole through the liquid delivery channel.

[0018] The junction of the injection hole and the liquid delivery channel is connected to a valve cavity, and a valve core is sealingly and slidably connected in the valve cavity. The distance between the valve core and the injection hole is proportional to the opening of the liquid delivery channel;

[0019] The valve core is connected to a first elastic member, and the hydraulic pressure in the injection hole and the first elastic member cause the valve core to tend to move away from the injection hole;

[0020] A balance chamber is formed at the axis of the rotating column, and the balance chamber is connected to the end of the valve cavity facing away from the injection hole. The balance chamber is filled with hydraulic oil, and the oil pressure in the balance chamber makes the valve core tend to approach the injection hole.

[0021] Furthermore, a piston cavity connected to the balance chamber is formed at the axis of the rotating column, a piston head is sealingly and slidingly connected in the piston cavity, and the piston head is connected to a second elastic member, which makes the piston head tend to approach the balance chamber.

[0022] Furthermore, a support cylinder is integrally connected to the base, a flange cylinder is integrally connected to the rotating disk, the flange cylinder is rotatably sleeved on the outer side of the support cylinder, a tensioning sleeve is integrally sleeved on the support cylinder, a pressure chamber is formed between the tensioning sleeve and the support cylinder, and an oil pressure channel connected to the pressure chamber is opened in the base and the support cylinder.

[0023] The beneficial effects of the present invention are:

[0024] An inertial reciprocating structure is provided between the rotating column and the rotating disk of the present invention. When the rotating disk brakes, an external water pump injects cutting fluid into the liquid inlet pipe at a constant flow rate. The cutting fluid flows to the injection hole through the liquid inlet channel, and is finally ejected from the injection hole to the T-slot. At the same time, the inertial reciprocating structure utilizes the inertia of the rotating column to cause the rotating column to reciprocate relative to the rotating disk within a predetermined angle. During the reciprocating rotation of the rotating column, when part of the cross-section of the injection hole is blocked by the rotating disk, the flow cross-sectional area of the injection hole is reduced, thereby increasing the flow rate of the water flow, and the injection hole at this time is aligned with the bottom angle of the T-slot close to one end of the rotating disk axis, thereby effectively flushing away the metal chips there.

[0025] In addition, in the process of the injection hole changing from alignment to offset with the corresponding T-slot, and from offset to alignment with the corresponding T-slot, the flow cross-sectional area of the injection hole changes dynamically, so that the water flow ejected from the injection hole produces a turbulent effect and forms a pulsed water flow, which destroys the adhesion between the molten metal and the wall of the T-slot and promotes the removal of metal chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 Schematic diagram of the structure of this embodiment;

[0028] Figure 2 for Figure 1 A magnified view of part A;

[0029] Figure 3 for Figure 1 A magnified view of part B;

[0030] Figure 4 for Figure 1 CC sectional view;

[0031] Figure 5 for Figure 1 DD sectional view;

[0032] Figure 6 Schematic diagram of the structure of the rotating column of this embodiment (the injection hole and the T-slot are staggered at this time).

[0033] Description of reference numerals:

[0034] Base 1,

[0035] Rotating disk 2, T-slot 21,

[0036] Motor stator 31, motor rotor 32, support cylinder 33, flange cylinder 34, expansion sleeve 35, pressure chamber 351, oil pressure channel 352,

[0037] Rotating column 4, injection hole 41, liquid inlet channel 42, diversion chamber 43, liquid delivery channel 44, valve chamber 45, balance chamber 46, piston chamber 47,

[0038] Liquid inlet pipe 5,

[0039] Inertial reciprocating structure 6,

[0040] Spline ring 61, limit block 611,

[0041] Spline 62, stop block 621, buffer pad 622,

[0042] Flywheel 63,

[0043] Valve core 71, first elastic member 72,

[0044] Piston head 81, second elastic member 82. DETAILED DESCRIPTION

[0045] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0046] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0047] As shown in the accompanying drawings, a high-precision five-axis machining center rotary table includes a base 1 and a rotating disk 2 rotatably connected to the base 1. The top of the rotating disk 2 is evenly distributed with multiple T-slots 21. The base 1 is provided with a motor stator 31, and the rotating disk 2 is provided with a motor rotor 32 coupled to the motor stator 31.

[0048] The rotating disc 2 is rotatably connected to a rotating column 4 at its axis. The sidewalls of the rotating column 4 are uniformly distributed with a plurality of injection holes 41 corresponding to the T-slots 21. A liquid inlet channel 42 communicating with the injection holes 41 is formed at the axis of the rotating column 4. The liquid inlet channel 42 is rotatably connected to a liquid inlet pipe 5, which is integrally connected to the base 1.

[0049] An inertial reciprocating structure 6 is provided between the rotating column 4 and the rotating disk 2. When the rotating disk 2 is braked, the inertial reciprocating structure 6 can utilize the inertia of the rotating column 4 to make the rotating column 4 reciprocate relative to the rotating disk 2 within a predetermined angle.

[0050] When the rotating column 4 is at the starting point of the stroke of reciprocating rotation relative to the rotating disk 2, the injection hole 41 is aligned with the corresponding T-slot 21;

[0051] When the rotating column 4 is at the end point of the reciprocating rotation relative to the rotating disk 2 , the injection hole 41 is staggered from the corresponding T-slot 21 .

[0052] Specifically, when it is necessary to clean the metal chips in the T-slot 21, first, the motor rotor 32 is powered on. After being powered on, the motor rotor 32 is subjected to the Ampere force in the magnetic field generated by the motor stator 31, thereby driving the rotating disk 2 and the rotating column 4 thereon to rotate at a predetermined speed. Then, the rotating disk 2 brakes and quickly stops rotating, while the rotating column 4 stores the kinetic energy of rotation under the action of inertia. At this time, the external water pump injects cutting fluid into the liquid inlet pipe 5 at a constant flow rate. The cutting fluid flows to the injection hole 41 through the liquid inlet channel 42, and is finally ejected from the injection hole 41 to the T-slot 21. At the same time, the inertial reciprocating structure 6 uses the kinetic energy stored in the rotating column 4 due to inertia to make the rotating column 4 rotate back and forth relative to the rotating disk 2 within a predetermined angle. During the reciprocating rotation of the rotating column 4, when part of the cross-section of the spray hole 41 is blocked by the rotating disk 2, the flow cross-sectional area of the spray hole 41 is reduced, thereby increasing the flow rate of the water flow, and at this time the spray hole 41 is aligned with the bottom angle of the T-slot 21 close to the axis of the rotating disk 2, thereby effectively flushing away the metal chips there.

[0053] In addition, during the process of the injection hole 41 changing from alignment to offset with the corresponding T-slot 21, and from offset to alignment with the corresponding T-slot 21, the flow cross-sectional area of the injection hole 41 changes dynamically, so that the water flow ejected from the injection hole 41 produces a turbulent effect and forms a pulsed water flow, which destroys the adhesion between the molten metal and the wall of the T-slot 21 and promotes the removal of metal chips.

[0054] Preferably, the inertial reciprocating structure 6 includes a spline ring 61 integrally sleeved on the outer side of the rotating column 4, and a plurality of limit blocks 611 are evenly distributed along the circumference of the outer wall of the spline ring 61;

[0055] A spline key 62 is integrally connected to the rotating disk 2 , and the spline key 62 is rotatably sleeved on the outside of the spline ring 61 . A plurality of stop blocks 621 cooperating with the limit blocks 611 are evenly distributed on the inner side wall of the spline key 62 along its circumference.

[0056] The limiting block 611 and the stopping block 621 are used to limit the relative rotation angle between the rotating column 4 and the rotating disk 2 .

[0057] Preferably, the limiting block 611 and the stopping block 621 are both permanent magnets;

[0058] A magnetic repulsive force is generated between the circumferentially adjacent limiting blocks 611 and stop blocks 621 of the rotating disk 2;

[0059] In order to avoid a hard collision between the limiting block 611 and the stopping block 621 , a buffer pad 622 is provided on the stopping block 621 to act on the limiting block 611 .

[0060] It can be understood that, in a stationary state, the axis of the injection hole 41 is aligned with the center line of the corresponding T-slot 21, and the limit block 611 is located between the adjacent stop blocks 621 in the circumferential direction of the rotating disk 2. At this time, the magnetic repulsive force generated by the adjacent stop blocks 621 on the limit block 611 is equal.

[0061] When the rotating disk 2 rotates clockwise at a predetermined speed and then quickly stops, the rotating column 4 continues to rotate under the action of inertia, thereby rotating relative to the rotating disk 2, thereby driving the limit block 611 to rotate clockwise. As the limit block 611 gradually approaches the clockwise stop block 621, the magnetic repulsive force of the clockwise stop block 621 on the limit block 611 gradually increases, while the magnetic repulsive force of the counterclockwise stop block 621 on the limit block 611 gradually weakens. During this process, the kinetic energy of the rotating column 4 is gradually converted into magnetic potential energy between the limit block 611 and the clockwise stop block 621. When the limit block 611 abuts the clockwise stop block 621, the rotating column 4 stops rotating. Next, under the magnetic repulsive force of the clockwise stop block 621, the stop block 611 drives the rotating column 4 to rotate counterclockwise. The magnetic potential energy between the stop block 611 and the clockwise stop block 621 is gradually converted into the kinetic energy of the rotating column 4. As the stop block 611 gradually approaches the counterclockwise stop block 621, the kinetic energy of the rotating column 4 is gradually converted into the magnetic potential energy between the stop block 611 and the counterclockwise stop block 621. This reciprocating process continues, and the rotating column 4, under the combined effects of inertia and the magnetic repulsive force of the stop block 621, will repeatedly change its rotation direction until the kinetic energy of the rotating column 4 is completely consumed by friction, air resistance, and other factors, and finally returns to a stationary state.

[0062] After returning to the stationary state, the external water pump still injects cutting fluid into the liquid inlet pipe 5 at a constant flow rate, thereby completely flushing away the metal chips in the T-slot 21.

[0063] In order to increase the kinetic energy that can be stored in the rotating column 4, preferably, the bottom end of the rotating column 4 is integrally connected to a flywheel 63 that is coaxial with the bottom end of the rotating column 4.

[0064] It is understood that if metal chips clog a certain T-slot 21, increasing the water flow in the T-slot 21 will help flush away the clogged metal chips. To this end, preferably, a diverter cavity 43 is formed in the rotating column 4 and communicates with the liquid inlet channel 42. The diverter cavity 43 communicates with the injection hole 41 through the liquid delivery channel 44.

[0065] The junction of the injection hole 41 and the liquid delivery channel 44 is connected to a valve chamber 45, and a valve core 71 is sealingly and slidably connected in the valve chamber 45. The distance between the valve core 71 and the injection hole 41 is proportional to the opening of the liquid delivery channel 44;

[0066] The valve core 71 is connected to a first elastic member 72 , and the hydraulic pressure in the injection hole 41 and the first elastic member 72 cause the valve core 71 to tend to move away from the injection hole 41 ;

[0067] A balancing chamber 46 is formed at the axis of the rotating column 4. The balancing chamber 46 is connected to the end of the valve cavity 45 facing away from the injection hole 41. The balancing chamber 46 is filled with hydraulic oil. The oil pressure in the balancing chamber 46 causes the valve core 71 to tend to approach the injection hole 41.

[0068] When it's necessary to flush away the metal chips within the T-slots 21, an external water pump injects cutting fluid into the inlet pipe 5 at a constant flow rate. The cutting fluid flows sequentially through the inlet channel 42 into the diverter chamber 43, then through the liquid delivery channel 44 to the spray holes 41, ultimately ejecting from the spray holes 41 toward the T-slots 21. If none of the T-slots 21 are blocked, the water flows smoothly within each T-slot 21. At this point, the hydraulic pressure within each spray hole 41 is equal, ensuring that the distance from each valve core 71 to the spray hole 41 is equal, and the openings of each liquid delivery channel 44 are also equal. This allows each spray hole 41 to spray cutting fluid with an equal flow rate.

[0069] If a T-slot 21 becomes clogged, the water level within that T-slot 21 will rise. When the water level reaches the spray hole 41 corresponding to that T-slot 21, the hydraulic pressure within that spray hole 41 increases. Under the action of this hydraulic pressure, the valve core 71 within the valve chamber 45 connected to that spray hole 41 will move away from the spray hole 41, thereby increasing the opening of the liquid supply channel 44 corresponding to that valve core 71 and squeezing the hydraulic oil within the balancing chamber 46, increasing the oil pressure within the balancing chamber 46. Furthermore, under the action of this increased oil pressure, the remaining valve cores 71 will move closer to the spray hole 41, reducing the opening of the remaining liquid supply channels 44. Simultaneously, the elastic force of the first elastic member 72 corresponding to these valve cores 71 will also increase. Thus, while maintaining the flow rate of the external water pump, the water flow through the spray hole 41 corresponding to the clogged T-slot 21 will increase, while the water flow through the spray holes 41 corresponding to the remaining T-slots 21 will decrease, thereby helping to flush away the clogged metal chips.

[0070] After the clogged metal chips are flushed away, the water flow in each T-slot 21 returns to normal, and the hydraulic pressure in each spray hole 41 is balanced again. Because the previous blockage caused the difference in the elastic force of the first elastic member 72, the first elastic member 72 corresponding to the unblocked T-slot 21 has a greater elastic force, pushing the corresponding valve core 71 away from the spray hole 41. The first elastic member 72 corresponding to the blocked T-slot 21 has a smaller elastic force, pushing the corresponding valve core 71 closer to the spray hole 41. This allows the openings of each liquid delivery channel 44 to be reset to equal.

[0071] Preferably, a piston cavity 47 connected to the balance chamber 46 is formed at the axis of the rotating column 4, and a piston head 81 is sealed and slidably connected in the piston cavity 47. The piston head 81 is connected to a second elastic member 82, and the second elastic member 82 makes the piston head 81 tend to approach the balance chamber 46.

[0072] Specifically, when the rotating disk 2 is braked, the external water pump injects cutting fluid into the liquid inlet pipe 5 at a constant flow rate. The cutting fluid flows into the diversion chamber 43 through the liquid inlet channel 42 in turn, then flows to the injection hole 41 through the liquid delivery channel 44, and finally is ejected from the injection hole 41 to the T-slot 21. At the same time, the inertial reciprocating structure 6 uses the inertia of the rotating column 4 to make the rotating column 4 rotate back and forth relative to the rotating disk 2 within a predetermined angle. During the reciprocating rotation of the rotating column 4, when the cross-section of the injection hole 41 changes from being aligned with the T-slot 21 to being completely blocked by the rotating disk 2, a water hammer effect will occur, causing the hydraulic pressure in the injection hole 41 to increase rapidly. This pressure change will push the valve core 71 away from the injection hole 41 and squeeze the hydraulic oil in the balance chamber 46, thereby pushing the piston head 81 away from the balance chamber 46, causing the second elastic member 82 to be compressed and store elastic energy. When the cross-section of the injection hole 41 is realigned with the T-slot 21, the hydraulic pressure within the injection hole 41 decreases rapidly. At this point, the second elastic member 82 releases its stored elastic energy, pushing the piston head 81 toward the injection hole 41. This reciprocating motion of the piston head 81 causes the water flow at the injection hole 41 to change, causing turbulence in the water flow ejected from the injection hole 41 and forming a pulsed water flow. This in turn destroys the adhesion between the molten metal and the wall of the T-slot 21, facilitating the removal of metal chips.

[0073] Preferably, a support cylinder 33 is integrally connected to the base 1, and a flange cylinder 34 is integrally connected to the rotating disk 2. The flange cylinder 34 is rotatably sleeved on the outside of the support cylinder 33. A tension sleeve 35 is integrally sleeved on the support cylinder 33, forming a pressure chamber 351 between the tension sleeve 35 and the support cylinder 33. An oil pressure channel 352 is defined within the base 1 and the support cylinder 33, communicating with the pressure chamber 351. When the rotating disk 2 is braked, an external oil pump injects hydraulic oil into the pressure chamber 351 through the oil pressure channel 352, causing the tension sleeve 35 to expand and deform, tightening the flange cylinder 34, thereby quickly stopping the rotating disk 2.

[0074] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A high-precision five-axis machining center rotary table, comprising a base and a rotating disk rotatably connected to the base, the top of the rotating disk being uniformly distributed with a plurality of T-slots, the base being provided with a motor stator, and the rotating disk being provided with a motor rotor coupled to the motor stator, characterized in that: The rotating disc is rotatably connected to a rotating column at its axis. The sidewalls of the rotating column are evenly distributed with a plurality of injection holes corresponding to the T-slots one by one. A liquid inlet channel connected to the injection holes is formed at the axis of the rotating column. The liquid inlet channel is sealed and rotatably connected to a liquid inlet pipe, which is integrally connected to the base. An inertial reciprocating structure is provided between the rotating column and the rotating disk. When the rotating disk is braked, the inertial reciprocating structure can utilize the inertia of the rotating column to make the rotating column and the rotating disk reciprocate relative to each other within a predetermined angle. When the rotating column is at the starting point of the stroke of reciprocating rotation relative to the rotating disk, the injection holes are aligned with the corresponding T-slots; When the rotating column is at the end point of the stroke of the reciprocating rotation relative to the rotating disk, the injection hole is staggered with the corresponding T-slot.

2. The high-precision five-axis machining center rotary table according to claim 1, characterized in that: The inertial reciprocating structure includes a spline ring integrally sleeved on the outside of the rotating column, and a plurality of limit blocks are evenly distributed along the circumference of the outer wall of the spline ring; The rotating disk is integrally connected with a spline key, which is rotatably sleeved on the outer side of the spline ring. A plurality of stop blocks cooperating with the limit blocks are evenly distributed on the inner side wall of the spline key along its circumference.

3. The high-precision five-axis machining center rotary table according to claim 2, characterized in that: The limit block and the stop block are both permanent magnets; A magnetic repulsive force is generated between the limiting blocks and the stop blocks adjacent to each other in the circumferential direction of the rotating disk; The stop block is provided with a buffer pad which acts on the limit block.

4. A high-precision five-axis machining center rotary table according to claim 1 or 2, characterized in that: The bottom end of the rotating column is integrally connected with a flywheel which is coaxial with the rotating column.

5. The high-precision five-axis machining center rotary table according to claim 1, characterized in that: A diversion cavity is formed in the rotating column and is connected to the liquid inlet channel. The diversion cavity is connected to the injection hole through the liquid delivery channel. The junction of the injection hole and the liquid delivery channel is connected to a valve cavity, and a valve core is sealingly and slidably connected in the valve cavity. The distance between the valve core and the injection hole is proportional to the opening of the liquid delivery channel; The valve core is connected to a first elastic member, and the hydraulic pressure in the injection hole and the first elastic member cause the valve core to tend to move away from the injection hole; A balance chamber is formed at the axis of the rotating column, and the balance chamber is connected to the end of the valve cavity facing away from the injection hole. The balance chamber is filled with hydraulic oil, and the oil pressure in the balance chamber makes the valve core tend to approach the injection hole.

6. The high-precision five-axis machining center rotary table according to claim 5, characterized in that: A piston cavity communicated with the balance chamber is formed at the axis of the rotating column. A piston head is sealingly and slidingly connected in the piston cavity. The piston head is connected to a second elastic member. The second elastic member makes the piston head tend to approach the balance chamber.

7. The high-precision five-axis machining center rotary table according to claim 1, characterized in that: A support cylinder is integrally connected to the base, a flange cylinder is integrally connected to the rotating disk, the flange cylinder is rotatably sleeved on the outer side of the support cylinder, a tensioning sleeve is integrally sleeved on the support cylinder, a pressure chamber is formed between the tensioning sleeve and the support cylinder, and an oil pressure channel connected to the pressure chamber is opened in the base and the support cylinder.

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