A high-rigidity spindle

Abstract

The application relates to a high-rigidity main shaft and relates to the technical field of main shafts. The main shaft body is provided with a cooling air channel at the axis, a plurality of cooling flow channels are arranged in the main shaft body along the axis direction, the cooling flow channels are distributed along the circumferential direction of the cooling air channel, an oil inlet groove is arranged on the peripheral wall of one end of the main shaft body, an oil outlet groove is arranged on the peripheral wall of the other end, a plurality of flow-through holes are arranged in the bottom walls of the oil inlet groove and the oil outlet groove and correspond to the cooling flow channels, the flow-through holes are communicated with the corresponding cooling flow channels, cooling oil ring pipes are arranged in the oil inlet groove and the oil outlet groove, the oil inlet groove and the oil outlet groove are communicated with the respective cooling oil ring pipes, and the cooling oil ring pipes are rotationally connected with the main shaft body. The application has the effects of improving the heat dissipation performance of the rigid main shaft, reducing the probability of thermal expansion of the rigid main shaft, and guaranteeing machining precision.

Description

Technical Field

[0001] This application relates to the field of spindle technology, and in particular to a high-rigidity spindle. Background Technology

[0002] The spindle is the core component of a mechanical system that transmits rotational motion and torque, often serving as the "heart" of the equipment. Its performance directly affects the machining accuracy, operational stability, and service life of the equipment. Therefore, the design of the spindle needs to balance rigidity, strength, and dynamic balance to meet the performance requirements under different working conditions. High-rigidity spindles, through structural optimization, material upgrades, and improved bearing technology, have achieved high resistance to deformation, high rotational accuracy, and stable cutting performance, effectively meeting the above requirements. However, due to the poor heat dissipation performance of existing high-rigidity spindles, under extreme conditions such as high speed and high temperature, the heat accumulated inside the spindle can easily lead to thermal expansion, which in turn causes axial or radial displacement of the spindle, reducing machining accuracy. Therefore, improvements are needed. Utility Model Content

[0003] In order to improve the heat dissipation performance of the rigid spindle, reduce the probability of axial or radial displacement of the spindle due to thermal expansion, and ensure the machining accuracy of the spindle, this application provides a high-rigidity spindle.

[0004] The high-rigidity spindle provided in this application adopts the following technical solution: A high-rigidity spindle includes a spindle body with a cooling air duct at its axis. Several cooling channels are formed inside the spindle body along the axial direction and distributed circumferentially along the cooling air duct. An oil inlet groove is formed on one end of the spindle body's peripheral wall, and an oil outlet groove is formed on the other end. Several flow holes are formed on the bottom walls of both the oil inlet and outlet grooves corresponding to the cooling channels, and these flow holes communicate with the corresponding cooling channels. Cooling oil ring pipes are provided in both the oil inlet and outlet grooves and are connected to their respective cooling oil ring pipes, which are rotatably connected to the spindle body.

[0005] By adopting the above technical solution, the heat dissipation performance of the spindle body is improved by using both air cooling and oil cooling methods. Cooling oil is injected into the oil inlet groove through the cooling oil ring pipe. Multiple cooling channels enable uniform heat exchange inside the spindle body, thereby further improving the heat exchange effect. This improves the heat dissipation performance of the rigid spindle, reduces the probability of thermal expansion causing axial or radial displacement of the spindle, and ensures the machining accuracy of the spindle.

[0006] Preferably, the inner walls of both sides of the oil inlet and outlet grooves are provided with arc-shaped slides, and a number of balls are arranged in the arc-shaped slides, with the balls abutting against the outer wall of the cooling oil ring pipe.

[0007] By adopting the above technical solution, the use of arc-shaped slides and ball bearings can effectively reduce the friction between the inner walls of the oil inlet and outlet grooves and the cooling oil ring pipe, thereby reducing wear.

[0008] Preferably, the outer wall of the cooling oil ring pipe is provided with a relief arc surface for the ball bearings to abut against, and the relief arc surface is provided along the circumferential direction of the cooling oil ring pipe.

[0009] By adopting the above technical solution, the opening of the clearance arc surface can effectively improve the sealing between the inner wall of the oil inlet and outlet groove and the cooling oil ring pipe, and prevent a large amount of cooling oil from overflowing.

[0010] Preferably, the outer wall of the cooling oil ring pipe located inside the relief arc surface has a lubrication groove.

[0011] By adopting the above technical solution, the lubrication groove is opened to allow some cooling oil to enter the arc-shaped slide to lubricate the balls, thereby further reducing the resistance generated during rotation.

[0012] Preferably, a negative pressure valve is provided on the inner wall of the opening of the cooling oil ring pipe in the oil outlet groove.

[0013] By adopting the above technical solution, the negative pressure valve can control the pressure inside the oil outlet tank, thereby maintaining the normal flow of cooling oil and ensuring safety during the oil cooling process.

[0014] Preferably, the spindle body has a plurality of heat dissipation grooves on its surface, the plurality of heat dissipation grooves being formed along the circumferential direction of the spindle body and distributed along the length direction of the spindle body.

[0015] By adopting the above technical solution, the surface area of ​​the spindle body can be increased by setting heat dissipation grooves, thereby increasing the heat dissipation area and further improving the heat dissipation performance of the spindle body.

[0016] Preferably, the spindle body surface has several etching grooves.

[0017] By adopting the above technical solution, the etching groove can increase the surface roughness of the spindle, thereby improving the heat dissipation capacity of the spindle surface and enhancing the adhesion of lubricant, thus reducing frictional heat generation.

[0018] Preferably, the peripheral wall of the spindle body is coated with a graphene coating.

[0019] By adopting the above technical solution, graphene has high thermal conductivity and low thermal resistance, which can effectively reduce the surface temperature of the spindle body, while improving the corrosion resistance and wear resistance of the spindle body, enabling the spindle body to adapt to extreme working conditions and extend its service life.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By utilizing both air cooling and oil cooling, the heat dissipation performance of the spindle body is improved. Cooling oil is injected into the oil inlet groove through the cooling oil ring pipe. Multiple cooling channels enable uniform heat exchange inside the spindle body, thereby further improving the heat exchange effect. This improves the heat dissipation performance of the rigid spindle, reduces the probability of thermal expansion causing axial or radial displacement of the spindle, and ensures the machining accuracy of the spindle. 2. The use of arc-shaped slideways and ball bearings can effectively reduce the friction between the inner walls of the oil inlet and outlet grooves and the cooling oil ring pipe, thereby reducing wear. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a high-rigidity spindle according to an embodiment of this application.

[0022] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Spindle body; 11. Cooling air duct; 12. Cooling flow channel; 13. Oil inlet groove; 14. Oil outlet groove; 15. Flow hole; 16. Arc-shaped slide; 17. Heat dissipation groove; 18. Etching groove; 2. Cooling oil ring pipe; 21. Relief arc surface; 22. Lubrication groove; 23. Negative pressure valve; 3. Ball bearing. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0025] This application discloses a high-rigidity spindle. (Refer to...) Figure 1 and Figure 2 The system includes a spindle body with several heat dissipation grooves on its surface. These grooves are formed along the circumferential direction of the spindle body and distributed along its length, thereby increasing the surface area of ​​the spindle body and expanding its heat dissipation area, thus improving its heat dissipation performance. The spindle body also has several etching grooves formed by chemical etching, which increases the surface roughness of the spindle body, enhancing its radiative heat dissipation capacity and improving lubricant adhesion, while reducing frictional heat generation. In this embodiment, the spindle body surface is coated with a graphene coating. Graphene has high thermal conductivity and low thermal resistance, effectively reducing the surface temperature of the spindle body and improving its corrosion resistance and wear resistance, enabling the spindle body to adapt to extreme working conditions and extending its service life.

[0026] Reference Figure 1 and Figure 2The spindle body has a cooling air duct coaxially arranged inside the spindle body to circulate cooling air and achieve air cooling of the spindle body. The spindle body has several cooling channels inside, which are opened along the axial direction of the spindle body and distributed around the cooling air duct in the circumferential direction of the cooling air duct. Thus, by combining oil cooling with air cooling, the spindle body can be cooled together.

[0027] Reference Figure 1 and Figure 2 An oil inlet groove is provided on the peripheral wall at one end of the spindle body, and an oil outlet groove is provided on the peripheral wall at the other end. Both the oil inlet groove and the oil outlet groove are opened along the circumferential direction of the spindle body. Several flow holes are provided on the bottom wall of the oil inlet groove and the oil outlet groove corresponding to the cooling channel. The flow holes are connected to the corresponding cooling channel, thereby realizing the input and output of cooling oil.

[0028] Reference Figure 1 and Figure 2 Both the inlet and outlet oil grooves are equipped with cooling oil ring pipes, which are rotatably connected to the spindle body. The inner side of the cooling oil ring pipe is inserted into the inlet and outlet oil grooves, and the outer wall of the cooling oil ring pipe abuts against the inner wall of the inlet and outlet oil grooves. The inner wall of the cooling oil ring pipe has an opening to allow cooling oil to flow. In this embodiment, a negative pressure valve is installed at the opening of the cooling oil ring pipe at the outlet oil groove, which can control the pressure inside the outlet oil groove, thereby maintaining the normal flow of cooling oil and ensuring safety during the oil cooling process.

[0029] Reference Figure 1 and Figure 2 Both sides of the oil inlet and outlet grooves have arc-shaped slideways on their inner walls, which are circumferentially oriented along the main shaft body. Several ball bearings are installed within the arc-shaped slideways. The outer wall of the cooling oil ring pipe has a relief arc surface for the ball bearings to abut against, also circumferentially oriented along the cooling oil ring pipe. The arc-shaped slideways and ball bearings effectively reduce the friction between the inner walls of the oil inlet and outlet grooves and the cooling oil ring pipe, thus reducing wear. The relief arc surface also effectively improves the sealing between the inner walls of the oil inlet and outlet grooves and the cooling oil ring pipe, preventing excessive leakage of cooling oil. A lubrication groove is provided on the inner side of the relief arc surface to allow some cooling oil to enter the arc-shaped slideway and lubricate the ball bearings, further reducing wear.

[0030] The implementation principle of a high-rigidity spindle in this application embodiment is as follows: This application improves the heat dissipation performance of the spindle body by opening cooling air channels and several cooling flow channels in the spindle body and using both air cooling and oil cooling methods. Cooling oil is injected into the oil inlet groove through the cooling oil ring pipe. Multiple cooling flow channels enable uniform heat exchange inside the spindle body, thereby further improving the heat exchange effect. This improves the heat dissipation performance of the rigid spindle, reduces the probability of thermal expansion causing axial or radial displacement of the spindle, and ensures the machining accuracy of the spindle.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-rigidity spindle, comprising a spindle body, characterized in that: A cooling air duct is provided at the axis of the main spindle body. Several cooling channels are provided inside the main spindle body along the axial direction. The cooling channels are distributed along the circumferential direction of the cooling air duct. An oil inlet groove is provided on the peripheral wall of one end of the main spindle body, and an oil outlet groove is provided on the peripheral wall of the other end. Several flow holes are provided on the bottom wall of the oil inlet groove and the oil outlet groove corresponding to the cooling channels. The flow holes are connected to the corresponding cooling channels. Cooling oil ring pipes are provided in the oil inlet groove and the oil outlet groove. The oil inlet groove and the oil outlet groove are connected to their respective cooling oil ring pipes. The cooling oil ring pipes are rotatably connected to the main spindle body.

2. The high-rigidity spindle according to claim 1, characterized in that: Both sides of the oil inlet and outlet grooves are provided with arc-shaped slides, and a number of balls are provided in the arc-shaped slides, which abut against the outer wall of the cooling oil ring pipe.

3. A high-rigidity spindle according to claim 2, characterized in that: The outer wall of the cooling oil ring pipe is provided with a relief arc surface for the ball bearings to abut against, and the relief arc surface is provided along the circumferential direction of the cooling oil ring pipe.

4. A high-rigidity spindle according to claim 3, characterized in that: The cooling oil ring pipe has a lubrication groove on its outer wall located inside the relief arc surface.

5. A high-rigidity spindle according to claim 1, characterized in that: A negative pressure valve is installed on the inner wall of the opening of the cooling oil ring pipe in the oil outlet trough.

6. A high-rigidity spindle according to claim 1, characterized in that: The spindle body has a plurality of heat dissipation grooves on its surface. The plurality of heat dissipation grooves are all opened along the circumferential direction of the spindle body and are distributed along the length direction of the spindle body.

7. A high-rigidity spindle according to claim 1, characterized in that: The main spindle body has several etching grooves on its surface.

8. A high-rigidity spindle according to claim 1, characterized in that: The peripheral wall of the main shaft body is coated with a graphene coating.

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