Machine tool rotary table oil cavity based on machine tool rotary table equipment

Abstract

The utility model relates to the technical field of machine tool rotary table oil cavities, in particular to a machine tool rotary table oil cavity based on machine tool rotary table equipment, which comprises an oil cavity body and a transfer table bearing surface, an outer side annular oil storage tank and a central oil storage tank are respectively formed inside the top of the oil cavity body, and a main hydraulic oil cavity pipe is arranged at the center of the bottom surface of the central oil storage tank. The main hydraulic oil cavity pipe is communicated with the interior of the center oil storage tank, two auxiliary hydraulic oil cavity pipes are arranged at the center of the vertical section of the outer side annular oil storage tank, the auxiliary hydraulic oil cavity pipes are communicated with the interior of the outer side annular oil storage tank, and an outer oil sealing edge is arranged on the upper portion of the center oil storage tank. By redesigning the layout structure of the oil cavity groove and the oil sealing edges, the outer side annular oil groove and multiple paths of inlet oil supply are added, the structural design of double oil sealing edges and double oil grooves is formed, multiple paths of oil supply are used, the bearing capacity of the oil cavity is improved, and then the more efficient oil supply effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool turntable oil chambers, in particular to a machine tool turntable oil chamber based on machine tool turntable equipment. Background Art

[0002] The turntables of high-end CNC machine tools utilize hydrostatic support technology, which offers advantages such as strong load-bearing capacity, excellent seismic resistance, high operating speed, long service life, and excellent stability. It is widely used in modern large-scale CNC machine tools and has become a key component. Vibration, heat, deformation, and wear during part machining are important factors affecting machine tool processing efficiency and precision. In a machine tool turntable system, the load-bearing capacity of the oil cavity is a key factor that directly determines the performance of the entire turntable system. The load-bearing capacity of the oil cavity includes two aspects: oil film stiffness and load-bearing capacity. Current research focuses on these two aspects, conducting research on oil cavity structure design and flow field characteristic simulation. Some scholars have proposed fan-shaped oil cavities, square oil cavities, and circular oil cavities, while others have designed the surface structure of the oil seal edge, adding strip-shaped or multi-annular micro-cavities to improve load-bearing capacity and oil film stiffness.

[0003] However, existing machine tool oil chambers still have certain shortcomings. In recent years, with the continuous development of aerospace research, processing large parts has become a necessity. The hydrostatic turntable support system of heavy-duty CNC machine tools needs to have higher load-bearing capacity and oil film stiffness. At present, the load-bearing rate of the above-mentioned traditional oil chamber structure is not high and cannot meet the processing requirements. Therefore, it is necessary to design a new oil chamber structure to achieve higher load-bearing capacity and oil film stiffness. Therefore, designing an oil chamber structure with higher load-bearing capacity is of great significance to the application of heavy-duty CNC machine tools. Utility Model Content

[0004] The purpose of the utility model is to provide a machine tool turntable oil chamber based on a machine tool turntable device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A machine tool turntable oil chamber based on a machine tool turntable equipment comprises an oil chamber body and a transfer platform support surface, an outer annular oil storage tank and a central oil storage tank are respectively formed inside the top of the oil chamber body, a main hydraulic oil chamber pipe is provided at the center of the bottom surface of the central oil storage tank, the main hydraulic oil chamber pipe and the interior of the central oil storage tank are connected, a secondary hydraulic oil chamber pipe is provided at the center of the vertical section of the outer annular oil storage tank, the number of the secondary hydraulic oil chamber pipes is set to two, the secondary hydraulic oil chamber pipe and the interior of the outer annular oil storage tank are connected, an outer oil seal edge is provided on the upper part of the central oil storage tank, and an inner oil seal edge is provided on the upper part of the outer annular oil storage tank.

[0007] As a preferred solution of the present invention, the central oil storage tank is composed of a first peripheral wall, a first bottom wall and a second peripheral wall, and the outer annular oil storage tank is composed of a third peripheral wall and a second bottom wall.

[0008] As a preferred solution of the present invention, the vertical cross-sections of the central oil storage tank and the outer annular oil storage tank are both set to be rectangular, the first bottom wall is in the shape of a ring, and the second bottom wall is in the shape of a circle.

[0009] As a preferred solution of the present invention, the central oil storage tank and the outer annular oil storage tank are concentric and coaxial, the depths of the central oil storage tank and the outer annular oil storage tank are equal, and the depths of the central oil storage tank and the outer annular oil storage tank are both set to 8 mm.

[0010] As a preferred solution of the present invention, the gap between the inner oil seal edge and the transfer platform support surface is set to microns, and the gap between the outer oil seal edge and the transfer platform support surface is set to 50 microns.

[0011] As a preferred solution of the present invention, the wall thickness of the main hydraulic oil cavity tube and the auxiliary hydraulic oil cavity tube is set between 0.5mm-2mm, and the inner diameter of the main hydraulic oil cavity tube and the auxiliary hydraulic oil cavity tube is set between 4mm-12mm.

[0012] As a preferred solution of the present invention, the surfaces of the outer oil seal edge and the inner oil seal edge are polished, and the surface roughness of the outer oil seal edge and the inner oil seal edge is set to less than 1 micron.

[0013] As a preferred solution of the present invention, the material of the oil chamber body is set to stainless steel, and the main hydraulic oil chamber tube and the auxiliary hydraulic oil chamber tube are both set to seamless steel pipes.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In the present invention, a double-sealing oil edge and double-oil groove structural design is formed by adding an outer annular oil storage tank and a secondary hydraulic oil chamber pipe in the oil chamber body. The double-sealing oil edge can improve the sealing performance and the reliability of the oil seal, while the double oil groove can reduce friction and extend the service life. Therefore, this structural design increases the area of ​​the high-pressure oil zone (2-3 times) and uses multiple oil supply channels to improve the bearing capacity of the oil chamber, thereby enhancing the overall stability and reliability of the equipment and reducing the occurrence of production accidents.

[0016] 2. In the present invention, a double oil sealing edge is formed by providing an outer oil sealing edge and an inner oil sealing edge, thereby increasing the oil sealing edge area of ​​the traditional oil chamber, making the sealing effect of the oil chamber better, effectively preventing oil leakage, ensuring the pressure inside the oil chamber is stable, thereby extending the service life of the oil chamber, and at the same time improving the oil film stiffness, so that the direct contact between the oil chamber body and the transfer platform support surface is effectively reduced, thereby reducing the wear and friction between the oil chamber body and the transfer platform support surface, and protecting the transfer platform support surface from damage. In addition, due to the design of adding an outer annular oil storage tank, a higher oil supply effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 This is a schematic top view of the oil chamber body of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall cross section of the utility model;

[0020] Figure 4 This is a working schematic diagram of the oil chamber body of the utility model.

[0021] In the figure: 1. Oil chamber body; 2. Transfer platform supporting surface; 3. Main hydraulic oil chamber tube; 4. Auxiliary hydraulic oil chamber tube; 5. Outer oil seal edge; 6. Inner oil seal edge; 7. Outer annular oil storage tank; 8. Central oil storage tank; 701. First circumferential wall; 702. First bottom wall; 703. Second circumferential wall; 801. Third circumferential wall; 802. Second bottom wall. DETAILED DESCRIPTION

[0022] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] For examples, see Figure 1-4 , the utility model provides a technical solution:

[0024] A machine tool turntable oil chamber based on a machine tool turntable equipment includes an oil chamber body 1 and a transfer platform support surface 2. An outer annular oil storage tank 7 and a central oil storage tank 8 are respectively formed inside the top of the oil chamber body 1. A main hydraulic oil chamber pipe 3 is provided at the center of the bottom surface of the central oil storage tank 8. The main hydraulic oil chamber pipe 3 and the interior of the central oil storage tank 8 are connected. An auxiliary hydraulic oil chamber pipe 4 is provided at the center of the vertical section of the outer annular oil storage tank 7. The number of auxiliary hydraulic oil chamber pipes 4 is set to two. The auxiliary hydraulic oil chamber pipe 4 and the interior of the outer annular oil storage tank 7 are connected. An outer oil seal edge 5 is provided on the upper part of the central oil storage tank 8, and an inner oil seal edge 6 is provided on the upper part of the outer annular oil storage tank 7.

[0025] In this embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the central oil storage tank 8 is composed of a first circumferential wall 701, a first bottom wall 702 and a second circumferential wall 703, and the outer annular oil storage tank 7 is composed of a third circumferential wall 801 and a second bottom wall 802. The vertical cross-sections of the central oil storage tank 8 and the outer annular oil storage tank 7 are both set to be rectangular, the first bottom wall 702 is in the shape of a circular ring, and the second bottom wall 802 is in the shape of a circle. The central oil storage tank 8 and the outer annular oil storage tank 7 are concentric and coaxial, and the depths of the central oil storage tank 8 and the outer annular oil storage tank 7 are equal, and the depths of the central oil storage tank 8 and the outer annular oil storage tank 7 are both set to 8 mm.

[0026] Among them, by adding an outer annular oil storage tank 7 and a secondary hydraulic oil chamber tube 4 in the oil chamber body 1, a double oil sealing edge and double oil groove structural design is formed. The double oil sealing edge can improve the sealing performance and improve the reliability of the oil seal, while the double oil groove can reduce friction and extend the service life. Therefore, this structural design increases the area of ​​the high-pressure oil zone (2-3 times) and uses multi-channel oil supply to improve the bearing capacity of the oil chamber, thereby enhancing the overall stability and reliability of the equipment and reducing the occurrence of production accidents.

[0027] In this embodiment, Figure 1 、 Figure 3 and Figure 4 As shown, the gap between the inner oil seal edge 6 and the transfer platform support surface 2 is set to 50 microns, the gap between the outer oil seal edge 5 and the transfer platform support surface 2 is set to 50 microns, the wall thickness of the main hydraulic oil cavity tube 3 and the auxiliary hydraulic oil cavity tube 4 is set between 0.5mm-2mm, the inner diameter of the main hydraulic oil cavity tube 3 and the auxiliary hydraulic oil cavity tube 4 is set between 4mm-12mm, the surfaces of the outer oil seal edge 5 and the inner oil seal edge 6 are polished, and the surface roughness of the outer oil seal edge 5 and the inner oil seal edge 6 are set to less than 1 micron, the material of the oil cavity body 1 is set to stainless steel, and the main hydraulic oil cavity tube 3 and the auxiliary hydraulic oil cavity tube 4 are set to seamless steel pipes.

[0028] Among them, by setting the outer oil sealing edge 5 and the inner oil sealing edge 6, a double oil sealing edge is formed, which increases the oil sealing edge area of ​​the traditional oil chamber, makes the sealing effect of the oil chamber better, and can effectively prevent oil leakage, ensure the pressure inside the oil chamber is stable, thereby extending the service life of the oil chamber, and also improves the oil film stiffness, so that the direct contact between the oil chamber body 1 and the transfer platform support surface 2 is effectively reduced, thereby reducing the wear and friction between the oil chamber body 1 and the transfer platform support surface 2, and protecting the transfer platform support surface 2 from damage. In addition, due to the design of adding the outer annular oil storage tank 7, a higher oil supply effect can be achieved.

[0029] The working process of the present utility model: When the oil chamber of a machine tool turntable device based on the present invention is in operation, the hydraulic oil flows from the main hydraulic oil chamber tube 3 and the two auxiliary hydraulic oil chamber tubes 4 under the action of the pressure pump into the inner and outer oil tanks. Under the limiting action of the outer oil seal edge 5 and the inner oil seal edge 6, a high-pressure oil area is generated to support the gravity of the transfer platform. The oil film pressure on the upper side of the outer oil seal edge 5 and the inner oil seal edge 6 changes with the external load to balance the external load acting on the transfer platform bearing surface 2, and can ensure that the guide rail surfaces are always in a pure liquid friction state at the required speed. Due to the design of the outer annular oil storage tank 7, a higher pressure can be generated inside the central oil storage tank 8, which improves the bearing capacity and does not produce a high displacement deviation when processing heavier parts. Due to the use of double annular oil sealing edges, its area is increased and the flow limiting effect is also enhanced. When the bearing surface vibrates due to eccentric load, the oil film stiffness can be enhanced to reduce the processing error caused by vibration.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool turntable oil chamber based on a machine tool turntable device, comprising an oil chamber body (1) and a transfer table support surface (2), characterized in that: An outer annular oil storage tank (7) and a central oil storage tank (8) are respectively formed inside the top of the oil chamber body (1); a main hydraulic oil chamber pipe (3) is provided at the center of the bottom surface of the central oil storage tank (8); the main hydraulic oil chamber pipe (3) and the interior of the central oil storage tank (8) are connected; an auxiliary hydraulic oil chamber pipe (4) is provided at the center of the vertical section of the outer annular oil storage tank (7); the number of the auxiliary hydraulic oil chamber pipes (4) is set to two; the auxiliary hydraulic oil chamber pipe (4) and the interior of the outer annular oil storage tank (7) are connected; an outer oil sealing edge (5) is provided on the upper part of the central oil storage tank (8); and an inner oil sealing edge (6) is provided on the upper part of the outer annular oil storage tank (7).

2. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The central oil storage tank (8) is composed of a first peripheral wall (701), a first bottom wall (702) and a second peripheral wall (703), and the outer annular oil storage tank (7) is composed of a third peripheral wall (801) and a second bottom wall (802).

3. The oil chamber for a machine tool turntable according to claim 2, wherein: The vertical cross-sections of the central oil storage tank (8) and the outer annular oil storage tank (7) are both arranged to be rectangular, the first bottom wall (702) is in the shape of a circular ring, and the second bottom wall (802) is in the shape of a circle.

4. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The central oil storage tank (8) and the outer annular oil storage tank (7) are concentric and coaxial, and the depths of the central oil storage tank (8) and the outer annular oil storage tank (7) are equal, and the depths of the central oil storage tank (8) and the outer annular oil storage tank (7) are both set to 8 mm.

5. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The gap between the inner oil seal edge (6) and the transfer platform support surface (2) is set to 50 microns, and the gap between the outer oil seal edge (5) and the transfer platform support surface (2) is set to 50 microns.

6. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The wall thickness of the main hydraulic oil cavity tube (3) and the auxiliary hydraulic oil cavity tube (4) is set between 0.5 mm and 2 mm, and the inner diameter of the main hydraulic oil cavity tube (3) and the auxiliary hydraulic oil cavity tube (4) is set between 4 mm and 12 mm.

7. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The surfaces of the outer oil seal edge (5) and the inner oil seal edge (6) are polished, and the surface roughness of the outer oil seal edge (5) and the inner oil seal edge (6) is set to be less than 1 micron.

8. The machine tool turntable oil chamber based on the machine tool turntable equipment according to claim 1, characterized in that: The material of the oil chamber body (1) is set to stainless steel, and the main hydraulic oil chamber tube (3) and the auxiliary hydraulic oil chamber tube (4) are both set to seamless steel pipes.

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