Air bearing spindle with waterway structure

Abstract

The application discloses a gas floating main shaft with a water channel structure and belongs to the technical field of thinning machines. The gas floating main shaft with the water channel structure comprises a mandrel, a shaft body assembly and a water channel structure. The mandrel can rotate around the Z axis relative to the shaft body assembly. The water channel structure comprises water inlet pipelines, cooling pipelines and water outlet pipelines arranged on the shaft body assembly respectively. The water inlet pipelines, the cooling pipelines and the water outlet pipelines are sequentially communicated, and a plurality of cooling pipelines are arranged and communicated with each other. Each cooling pipeline extends along the axial direction of the mandrel to form a series cooling loop in a snake shape, so that the cooling of the mandrel and the shaft body assembly can be more comprehensive through the formed series cooling loop, the entire gas floating main shaft with the water channel structure can be fully cooled, the influence of high temperature on the working precision of the gas floating main shaft with the water channel structure can be reduced, and the high working stability of the gas floating main shaft with the water channel structure during long-time operation can be ensured.

Description

Technical Field

[0001] This invention relates to the field of thinning machine technology, and in particular to an air-floating spindle with a water channel structure. Background Technology

[0002] Air-bearing spindles are high-precision machining structures, and their accuracy and stability have a significant impact on machining quality. Due to their high speed and precision, air-bearing spindles have become key components in thinning machines. However, air-bearing spindles generate heat during high-speed operation. Excessive heat can cause the spindle to seize and become unable to rotate stably; therefore, an effective cooling structure is required to dissipate the heat.

[0003] Currently, gas cooling structures are commonly used for cooling air-bearing spindles during high-speed operation. However, in air-bearing spindles that require high operational stability and long-term operation, gas cooling structures often fail to achieve the necessary cooling effect, resulting in poor cooling performance and affecting the overall operational stability of the air-bearing spindle during long-term operation.

[0004] To address the above issues, there is an urgent need for an air-floating spindle with a water-channel structure. Summary of the Invention

[0005] The purpose of this invention is to propose an air-floating spindle with a water channel structure, which can be fully cooled to reduce the impact of high temperature on the working accuracy of the air-floating spindle with the water channel structure, and ensure the high working stability of the air-floating spindle with the water channel structure during long-term operation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An air-floating spindle with a water-channel structure, used in a thinning machine, includes:

[0008] mandrel;

[0009] A shaft assembly, wherein the spindle is rotatable about the Z-axis relative to the shaft assembly;

[0010] The water circuit structure includes an inlet pipe, a cooling pipe, and an outlet pipe respectively disposed on the shaft assembly. The inlet pipe, the cooling pipe, and the outlet pipe are connected in sequence, and multiple interconnected cooling pipes are provided. Each cooling pipe extends along the axial direction of the spindle to form a series cooling loop with a serpentine structure.

[0011] As an optional solution, the shaft assembly includes:

[0012] A copper sleeve is coaxially fitted over the mandrel;

[0013] A shaft body has a first cavity formed inside it. The copper sleeve and the mandrel are coaxially disposed in the first cavity, and a motor is also disposed in the first cavity. The motor is located above the copper sleeve. The motor includes a stator and a rotor that cooperate with each other. The protruding outer edge of the stator is placed on the top surface of the shaft body, and the rotor is fixedly sleeved on the mandrel. The shaft body and the protruding outer edge are provided with the cooling pipes.

[0014] An end cap, a portion of which is disposed on the spindle and another portion of which is disposed on the protruding outer edge, wherein the water inlet pipe and the water outlet pipe are respectively disposed at intervals on the end cap.

[0015] As an optional solution, the shaft assembly further includes:

[0016] An upper air-blowing plate is placed below the copper sleeve, and the upper air-blowing plate is coaxially sleeved on the mandrel;

[0017] A movable disc is placed below the upper air-blowing disc. The movable disc is coaxially sleeved on the mandrel and along the axial direction of the mandrel, a portion of the top surface of the movable disc abuts against the stepped surface of the mandrel.

[0018] The lower air-blowing plate is placed below the movable plate, and the lower air-blowing plate is coaxially sleeved on the spindle;

[0019] A cover is placed below the lower air-blowing disc, and the cover is coaxially connected to the shaft.

[0020] A base plate is placed below the cover plate, the base plate is sleeved on the spindle, and the base plate, the movable plate and the spindle are coaxially connected.

[0021] As an optional solution, the water system structure further includes a cooling water tank, which is arranged in a ring around the cover; the cooling pipes are provided in five configurations, including:

[0022] A first cooling pipe, one end of which is connected to the water inlet pipe, and the other end of which is connected to the cooling water tank;

[0023] The second cooling pipe has one end connected to the cooling water tank;

[0024] A third cooling pipe, one end of which is connected to the other end of the second cooling pipe;

[0025] A fourth cooling pipe, one end of which is connected to the other end of the third cooling pipe;

[0026] The fifth cooling pipe has one end connected to the other end of the fourth cooling pipe, and the other end connected to the water outlet pipe.

[0027] Alternatively, along the axial direction of the mandrel, the lengths of the first cooling pipe, the third cooling pipe, the fourth cooling pipe, and the fifth cooling pipe gradually decrease, and the length of the first cooling pipe is equal to the length of the second cooling pipe.

[0028] As an optional solution, a first branch line is connected between the second cooling pipe and the third cooling pipe, between the third cooling pipe and the fourth cooling pipe, and between the fourth cooling pipe and the fifth cooling pipe, and the first branch line is arranged along the circumference of the mandrel.

[0029] As an optional solution, the waterway structure also includes:

[0030] The second branch is disposed on the shaft body and extends radially along the mandrel. The first cooling pipe, the second cooling pipe, the third cooling pipe, the fourth cooling pipe and the fifth cooling pipe are respectively connected to the second branch.

[0031] Alternatively, the mandrel has a second cavity extending along the Z-axis inside; the shaft assembly further includes:

[0032] The cover plate is snapped onto the end cap;

[0033] A water inlet pipe is installed on the cover plate, with one end of the water inlet pipe located outside the cover plate and the other end of the water inlet pipe inserted into the second cavity. The water inlet pipe is used to supply cutting fluid into the second cavity.

[0034] As an optional solution, the shaft assembly further includes:

[0035] A plug is installed at the bottom end of the spindle where the water inlet pipe is not located;

[0036] A liquid supply passage is provided near the plug. A portion of the liquid supply passage is located on the mandrel, and another portion of the liquid supply passage is located on the base plate and between the base plate and the mandrel. The two ends of the liquid supply passage are respectively connected to the second cavity and the bottom end face of the base plate.

[0037] As an optional solution, the liquid supply path includes:

[0038] A first passage is provided near the plug, and the spindle is provided with the first passage, which is connected to the second cavity;

[0039] A second passage is disposed between the base plate and the mandrel, and one end of the second passage is connected to the first passage.

[0040] A first water passage is provided inside the base plate, and the first water passage extends radially along the mandrel. The other end of the second passage is connected to the first water passage.

[0041] The second water passage is disposed on the base plate and penetrates the bottom end face of the base plate. The second water passage extends along the axial direction of the mandrel and communicates with the first water passage.

[0042] The beneficial effects of this invention are as follows:

[0043] By enabling the spindle to rotate relative to the spindle assembly around the Z-axis, and by providing sequentially connected inlet, cooling, and outlet water pipes within the spindle assembly, water can be introduced through the inlet pipes, cooled through the cooling pipes, and discharged through the outlet pipes, thus achieving cooling of the spindle and spindle assembly. Furthermore, the spindle assembly is equipped with multiple interconnected cooling pipes, each extending axially along the spindle to form a serpentine series cooling loop. This results in a large cooling area for the spindle and spindle assembly, ensuring comprehensive cooling and adequate cooling of the entire water-cooled air-bearing spindle. This reduces the impact of high temperatures on the working accuracy of the water-cooled air-bearing spindle, ensuring high operational stability during long-term operation. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of the air-floating main shaft with a water channel structure provided by the present invention;

[0045] Figure 2 This is a cross-sectional view of the air-floating main shaft with a water channel structure provided by the present invention;

[0046] Figure 3 This is a perspective view of the shaft provided by the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the disc cover provided by the present invention;

[0048] Figure 5 This is a schematic diagram of the interconnected structure of the water inlet pipe, the first cooling pipe, and the cooling water tank provided by the present invention.

[0049] Figure 6 This is a schematic diagram of the internal structure of the shaft (excluding some structures) provided by the present invention. Figure 1 ;

[0050] Figure 7 This is a schematic diagram of the internal structure of the shaft (excluding some structures) provided by the present invention. Figure 2 ;

[0051] Figure 8 This is a schematic diagram of the structure of the first and second pathways provided by the present invention;

[0052] Figure 9 This is a schematic diagram of the structure of the base plate provided by the present invention.

[0053] Explanation of reference numerals in the attached figures:

[0054] 1-Mandrel; 11-Second cavity;

[0055] 2-Shaft assembly; 21-Copper sleeve; 22-Shaft; 23-Motor; 231-Stator; 2311-Protruding outer edge; 232-Rotor; 24-End cover; 241-Cover plate; 25-Upper air-blowing plate; 26-Moving plate; 27-Lower air-blowing plate; 28-Plate cover; 29-Base plate; 201-Water inlet pipe; 202-Plug; 203-First passage; 204-Second passage; 205-First water inlet hole; 207-Air spacer; 208-Dynamic balance pressure ring;

[0056] 31-Inlet water pipe; 321-First cooling pipe; 322-Second cooling pipe; 323-Third cooling pipe; 324-Fourth cooling pipe; 325-Fifth cooling pipe; 33-Outlet water pipe; 34-Second branch pipe; 35-Cooling water tank. Detailed Implementation

[0057] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0058] Any feature disclosed in this specification, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features. Throughout this specification, the same reference numerals indicate the same elements.

[0059] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0060] This embodiment proposes an air-floating spindle with a water channel structure and a thinning machine including the air-floating spindle with the water channel structure. The air-floating spindle with the water channel structure has a better cooling effect, which can reduce the impact of high temperature on the working accuracy of the air-floating spindle with the water channel structure, so as to avoid the problem of the air-floating spindle with the water channel structure getting stuck and unable to rotate stably, thereby ensuring the high working stability of the air-floating spindle with the water channel structure during long-term operation.

[0061] Specifically, such as Figure 1 and Figure 2 As shown, the air-floating spindle with a water channel structure includes a spindle 1, a shaft assembly 2, and a water channel structure; wherein, the spindle 1 can rotate about the Z-axis relative to the shaft assembly 2; the water channel structure includes an inlet pipe 31, a cooling pipe, and an outlet pipe 33 respectively disposed on the shaft assembly 2, the inlet pipe 31, the cooling pipe, and the outlet pipe 33 are connected in sequence, and multiple interconnected cooling pipes are provided, each cooling pipe extending along the axial direction of the spindle 1 to form a series cooling loop with a serpentine structure.

[0062] In this embodiment, the air-floating spindle with a water-channel structure, compared to the prior art, changes the cooling method for the spindle 1 and the shaft assembly 2. Specifically, it forms a serpentine series cooling loop to water-cool the entire air-floating spindle. By allowing the spindle 1 to rotate relative to the shaft assembly 2 around the Z-axis, and by providing a sequentially connected water inlet pipe 31, cooling pipe, and water outlet pipe 33 on the shaft assembly 2, water can enter through the water inlet pipe 31, cool the spindle 1 and shaft assembly 2 through the cooling pipe, and discharge the cooled water through the water outlet pipe 33, thereby achieving [the desired cooling effect]. Cooling of the spindle 1 and the shaft assembly 2; and, the shaft assembly 2 is provided with multiple interconnected cooling pipes, and each cooling pipe extends along the axial direction of the spindle 1 to form a serpentine series cooling loop. This allows the series cooling loop to have a large cooling area for the spindle 1 and the shaft assembly 2, ensuring comprehensive cooling of the spindle 1 and the shaft assembly 2. This allows for sufficient cooling of the entire air-bearing spindle with a water channel structure, thereby reducing the impact of high temperature on the working accuracy of the air-bearing spindle with a water channel structure, and ensuring high working stability of the air-bearing spindle with a water channel structure during long-term operation.

[0063] It is worth noting that the water cooling involved in this embodiment can be either constant-temperature cooling water or constant-temperature coolant. There is no specific limitation here, as long as it can be cooled down by water cooling.

[0064] Furthermore, such as Figure 1 and Figure 2As shown, the shaft assembly 2 includes a copper sleeve 21, a shaft body 22, and an end cap 24; wherein, the copper sleeve 21 is coaxially sleeved outside the mandrel 1; a first cavity is formed inside the shaft body 22, and the copper sleeve 21 and the mandrel 1 are both coaxially disposed in the first cavity, and a motor 23 is also disposed in the first cavity, the motor 23 being located above the copper sleeve 21, so as to provide abutment and limiting of the top end of the copper sleeve 21 through the motor 23; and the motor 23 includes a stator 231 and a rotor that cooperate with each other. The protruding outer edge 2311 of the stator 232 and the rotor 232 are placed on the top surface of the shaft 22. The rotor 232 is fixedly sleeved on the spindle 1 so that the spindle 1 can be driven to rotate synchronously around the Z-axis through the rotor 232. The shaft 22 and the protruding outer edge 2311 are provided with cooling pipes. A part of the end cover 24 is covered on the spindle 1, and another part of the end cover 24 is covered on the protruding outer edge 2311. The water inlet pipe 31 and the water outlet pipe 33 are respectively spaced apart on the end cover 24.

[0065] Specifically, such as Figure 1 and Figure 2 As shown, the end cover 24, the protruding outer edge 2311 of the stator 231, and the shaft 22 are axially connected by bolts; and the spindle 1 and the rotor 232 are axially connected by bolts to ensure that the rotor 232 drives the spindle 1 to rotate synchronously around the Z-axis. The stator 231 and rotor 232 of the motor 23 are common motor components in the prior art, and their structure and working principle will not be described in detail here.

[0066] Furthermore, such as Figure 1 and Figure 2 As shown, the shaft assembly 2 also includes an upper air-blowing disc 25, a movable disc 26, a lower air-blowing disc 27, a disc cover 28, and a base disc 29; wherein, the upper air-blowing disc 25 is coaxially sleeved on the mandrel 1, and the upper air-blowing disc 25 is positioned below the copper sleeve 21 so as to provide abutment and limiting to the bottom end of the copper sleeve 21 through the upper air-blowing disc 25; the movable disc 26 is positioned below the upper air-blowing disc 25, and the movable disc 26 is coaxially sleeved on the mandrel 1, and along the axial direction of the mandrel 1. Part of the top surface of the movable disc 26 abuts against the stepped surface of the mandrel 1, providing axial support for the mandrel 1 via the movable disc 26; the lower air-blowing disc 27 is positioned below the movable disc 26 and coaxially sleeved on the mandrel 1; the disc cover 28 is coaxially positioned below the lower air-blowing disc 27, and the disc cover 28 is coaxial with the shaft body 22 and the two are axially connected by bolts; the base disc 29 is positioned below the disc cover 28 and sleeved on the mandrel 1. Specifically, the axial direction of the mandrel 1 is as follows... Figure 1 The vertical direction in the diagram, that is, the axial direction of mandrel 1, is specifically as follows: Figure 2 The Z-axis is shown in the figure.

[0067] Specifically, such as Figure 2As shown, the shaft assembly 2 also includes an air gap ring 207 and a dynamic balancing pressure ring 208. The air gap ring 207 is coaxially positioned below the upper air-blowing disc 25, and is limited between the movable disc 26 and the shaft 22. The lower air-blowing disc 27 is coaxially positioned below the air gap ring 207. That is, the upper air-blowing disc 25, the air gap ring 207, and the lower air-blowing disc 27 are coaxial and tightly fitted within the first cavity of the shaft 22. The inner ring of the lower air-blowing disc 27 is coaxially provided with the dynamic balancing pressure ring 208, which is positioned between the spindle 1 and the lower air-blowing disc 27. The base disc 29, the dynamic balancing pressure ring 208, the movable disc 26, and the spindle 1 are axially connected by bolts.

[0068] By setting an air gap 207 and a dynamic balance pressure ring 208, a certain sealing effect can be provided to prevent cooling water from flowing out of the shaft assembly 2, thereby ensuring the cooling effect of the cooling water on the spindle 1 and the shaft assembly 2. In addition, the dynamic balance pressure ring 208 rotates synchronously with the spindle 1 around the Z-axis, so that the dynamic balance pressure ring 208 can provide dynamic balance correction for the rotation of the spindle 11, thereby ensuring the smoothness of the rotation of the spindle 1 around the Z-axis.

[0069] like Figure 2 As shown, by coaxially arranging the mandrel 1, copper sleeve 21, shaft body 22, motor 23, end cover 24, upper air-blowing plate 25, movable plate 26, lower air-blowing plate 27, air spacer 207, dynamic balance pressure ring 208, plate cover 28, and base plate 29, the coaxiality of the mandrel 1 on the Z-axis can be better guaranteed, thereby avoiding the problem of misalignment of the mandrel 1 during high-speed rotation around the Z-axis, and thus ensuring the stability and reliability of the rotation of the mandrel 1.

[0070] Furthermore, such as Figures 3 to 7As shown, the water system structure also includes a cooling water tank 35, which is arranged in a ring on the top surface of the cover 28. Five cooling pipes are provided, namely a first cooling pipe 321, a second cooling pipe 322, a third cooling pipe 323, a fourth cooling pipe 324, and a fifth cooling pipe 325. One end of the first cooling pipe 321 is connected to the inlet pipe 31, and the other end of the first cooling pipe 321 is connected to the cooling water tank 35. One end of the second cooling pipe 322 is connected to the cooling water tank 35, and one end of the third cooling pipe 323 is connected to the second cooling pipe 324. The other end of 322 is connected, one end of the fourth cooling pipe 324 is connected to the other end of the third cooling pipe 323, one end of the fifth cooling pipe 325 is connected to the other end of the fourth cooling pipe 324, and the other end of the fifth cooling pipe 325 is connected to the outlet pipe 33, thereby realizing the sequential connection of the inlet pipe 31, the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, the fifth cooling pipe 325 and the outlet pipe 33, so as to form a serpentine series cooling circuit inside the air-float main shaft with a water circuit structure.

[0071] By setting up five cooling pipes—the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325—the cooling area for the spindle 1 and the spindle assembly 2 can be further increased. This ensures more comprehensive cooling of the spindle 1 and the spindle assembly 2, better guaranteeing sufficient cooling of the entire air-bearing spindle with a water-channel structure. This reduces the impact of high temperatures on the working accuracy of the air-bearing spindle with a water-channel structure, further ensuring high working stability of the air-bearing spindle with a water-channel structure during long-term operation. The specific number of cooling pipes is not limited here, as long as each cooling pipe can basically cover all positions of the spindle 22.

[0072] It is worth noting that a portion of the first cooling pipe 321 is located on the protruding outer edge 2311, and the other portion of the first cooling pipe 321 is located on the shaft body 22; a portion of the second cooling pipe 322 is located on the protruding outer edge 2311, and the other portion of the second cooling pipe 322 is located on the shaft body 22; a portion of the third cooling pipe 323 is located on the protruding outer edge 2311, and the other portion of the third cooling pipe 323 is located on the shaft body 22; a portion of the fourth cooling pipe 324 is located on the protruding outer edge 2311, and the other portion of the fourth cooling pipe 324 is located on the shaft body 22; a portion of the fifth cooling pipe 325 is located on the protruding outer edge 2311, and the other portion of the fifth cooling pipe 325 is located on the shaft body 22.

[0073] Furthermore, such as Figures 3 to 7As shown, along the axial direction of the mandrel 1, the lengths of the first cooling pipe 321, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325 gradually decrease, and the length of the first cooling pipe 321 is equal to the length of the second cooling pipe 322. On the one hand, this ensures that the lengths of each cooling pipe—the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325—are all suitable, avoiding waste of resources and ensuring that the processing of each cooling pipe is relatively simple and convenient. On the other hand, this ensures that the five cooling pipes of suitable length basically cover all positions of the shaft 22, thereby ensuring a good cooling effect for the five cooling pipes of different lengths.

[0074] Specifically, first branch lines are respectively connected between the second cooling pipe 322 and the third cooling pipe 323, between the third cooling pipe 323 and the fourth cooling pipe 324, and between the fourth cooling pipe 324 and the fifth cooling pipe 325. These first branch lines are arranged circumferentially along the mandrel 1, thereby enabling connection between the second cooling pipe 322 and the third cooling pipe 323, between the third cooling pipe 323 and the fourth cooling pipe 324, and between the fourth cooling pipe 324 and the fifth cooling pipe 325. Here, the shape and size of the first branch lines are not limited, as long as they can connect the cooling pipes extending axially along the mandrel 1.

[0075] Furthermore, such as Figure 6 and Figure 7 As shown, the water channel structure also includes a second branch 34, which is disposed on the shaft 22 and extends radially along the spindle 1. The second branch 34 is connected to the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325, respectively. Specifically, the radial direction of the spindle 1 is as follows... Figure 2 The horizontal direction in the middle.

[0076] By connecting second branch lines 34 to the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325 respectively, cooling water can flow into each second branch line 34, thereby increasing the cooling area of ​​the spindle 1 and the shaft assembly 2. This results in a more uniform and comprehensive distribution of cooling water within the entire air-bearing spindle with a water channel structure, thus ensuring better uniformity and sufficiency of the cooling effect.

[0077] It is worth noting that the number of second branch lines 34 connected to the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325 can be multiple. Here, the number of second branch lines 34 connected to the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325 is not limited, and needs to be determined according to the actual cooling conditions and the overall structural layout.

[0078] Furthermore, such as Figure 1 and Figure 2 As shown, a second cavity 11 extending along the Z-axis is formed inside the mandrel 1; the shaft assembly 2 also includes a cover plate 241 and a water inlet pipe 201; wherein, the cover plate 241 is snapped onto the end cap 24, facilitating the installation of the water inlet pipe 201 through the cover plate 241; the water inlet pipe 201 is installed onto the cover plate 241, one end of the water inlet pipe 201 is located outside the cover plate 241, and the other end of the water inlet pipe 201 is inserted into the second cavity 11, the water inlet pipe 201 is used to supply cutting fluid into the second cavity 11, so that the cutting fluid in the second cavity 11 can be supplied to the cutting tool in the thinning machine, so that the cutting tool can cut and thin the workpiece. The cover plate 241 is locked in the groove of the end cap 24, and the cutting tool can be a cutting blade or a drill bit.

[0079] Specifically, such as Figure 2 and Figure 8 As shown, the shaft assembly 2 also includes a plug 202 and a fluid supply passage; wherein, the plug 202 is plugged at the bottom end of the spindle 1 where the water inlet pipe 201 is not provided, that is, the top end of the second cavity 11 of the spindle 1 is inserted with the water inlet pipe 201, and the bottom end of the second cavity 11 of the spindle 1 is sealed with the plug 202; the fluid supply passage is located near the plug 202, a part of the fluid supply passage is located on the spindle 1, and the other part of the fluid supply passage is located on the base plate 29 and between the base plate 29 and the spindle 1. The two ends of the fluid supply passage are respectively connected to the bottom end face of the second cavity 11 and the base plate 29, so that the cutting fluid in the second cavity 11 can be transported to the bottom end face of the base plate 29 through the fluid supply passage, so that the cutting fluid flows to the cutting tool through the bottom end face of the base plate 29.

[0080] By setting up a second cavity 11 and a liquid supply passage that work together, on the one hand, the cutting fluid in the second cavity 11 can be easily supplied to the cutting tool through the liquid supply passage, so that the cutting tool can perform cutting and thinning work and ensure the smooth cutting of the entire thinning machine; on the other hand, the flow of cutting fluid in the second cavity 11 and the liquid supply passage can carry away some of the heat generated by the spindle 1, which is beneficial to ensure a better cooling effect on the entire air-floating spindle with water channel structure.

[0081] Specifically, such as Figure 8 and Figure 9 As shown, the liquid supply passage includes a first passage 203, a second passage 204, a first water inlet 205, and a second water inlet; wherein, the mandrel 1 is provided with the first passage 203, and the first passage 203 is located close to the plug 202, that is, the first passage 203 is located in the lower half of the mandrel 1, and the first passage 203 communicates with the second cavity 11; the second passage 204 is located between the base plate 29 and the mandrel 1, and one end of the second passage 204 communicates with the first passage 203; the first water inlet 205 is located inside the base plate 29, and the first water inlet 205 extends radially along the mandrel 1, and the other end of the second passage 204 communicates with the first water inlet 205; the second water inlet is located on the base plate 29 and penetrates the bottom end face of the base plate 29, the second water inlet extends axially along the mandrel 1, and the second water inlet communicates with the first water inlet 205.

[0082] Specifically, such as Figure 8 and Figure 9 As shown, after the cutting fluid enters the second cavity 11 through the water inlet pipe 201, the cutting fluid flows through the second cavity 11 to the first passage 203 near the plug 202; then, it flows through the first passage 203 to the second passage 204, the first water inlet 205 and the second water inlet in sequence; finally, it flows through the second water inlet to the bottom surface of the base plate 29, and then flows through the bottom surface of the base plate 29 to the cutting tool, so that the cutting tool can perform cutting and thinning work.

[0083] The specific working process of the air-floating spindle with a water channel structure in this embodiment is as follows:

[0084] First, cooling water flows into the inlet pipe 31, so that the cooling water in the inlet pipe 31 passes sequentially through the first cooling pipe 321, the cooling water tank 35, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, and the fifth cooling pipe 325. At the same time, the cooling water in the first cooling pipe 321 flows to the second branch pipe 34 connected to it, the cooling water in the second cooling pipe 322 flows to the second branch pipe 34 connected to it, the cooling water in the third cooling pipe 323 flows to the second branch pipe 34 connected to it, the cooling water in the fourth cooling pipe 324 flows to the second branch pipe 34 connected to it, and the cooling water in the fifth cooling pipe 325 flows to the second branch pipe 34 connected to it. Thus, the spindle 1 and the shaft assembly 2 are cooled by water through the first cooling pipe 321, the second cooling pipe 322, the third cooling pipe 323, the fourth cooling pipe 324, the fifth cooling pipe 325, and each of the second branch pipes 34.

[0085] Then, the cooling water in the fifth cooling pipe 325 flows out through the outlet pipe 33 to the outside of the entire air-floating main shaft with water channel structure, so as to achieve water cooling of the entire air-floating main shaft with water channel structure.

[0086] Meanwhile, the cutting fluid flows into the second cavity 11 of the spindle 1 through the water inlet pipe 201, and then flows through the second cavity 11 to the first passage 203 near the plug 202; then, it flows through the first passage 203 to the second passage 204, the first water inlet 205 and the second water inlet; then, it flows through the second water inlet to the bottom end face of the base plate 29, and then flows through the bottom end face of the base plate 29 to the cutting tool, so that the cutting tool can perform cutting and thinning work; at the same time, the cutting fluid can carry away some of the heat of the spindle 1, ensuring a better water cooling effect for the entire air-floating spindle with water channel structure.

[0087] In this embodiment, the air-floating spindle with a water-channel structure is configured with an inlet pipe 31, a first cooling pipe 321, a second cooling pipe 322, a third cooling pipe 323, a fourth cooling pipe 324, a fifth cooling pipe 325, and an outlet pipe 33, forming a serpentine series cooling loop. This ensures good water cooling for the entire air-floating spindle with a water-channel structure. The continuous flow of cooling water in the series cooling loop effectively removes the heat generated during operation, improving the working accuracy and service life of the air-floating spindle with a water-channel structure. Furthermore, the water-channel structure is simple and easy to manufacture, resulting in lower processing costs.

[0088] In this embodiment, the air-floating spindle with a water channel structure is equipped with a second cavity 11, a first passage 203, a second passage 204, a first water passage 205, and a second water passage that work together to ensure that the cutting fluid is supplied to the cutting tool while the cutting fluid cools the spindle 1, thus making the water cooling effect of the entire air-floating spindle with a water channel structure better.

[0089] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. An air-floating main shaft with a water-channel structure, used in a thinning machine, characterized in that, include: mandrel (1); Shaft assembly (2), wherein the spindle (1) is rotatable about the Z-axis relative to the shaft assembly (2); The water circuit structure includes an inlet pipe (31), a cooling pipe and an outlet pipe (33) respectively disposed on the shaft assembly (2). The inlet pipe (31), the cooling pipe and the outlet pipe (33) are connected in sequence, and multiple interconnected cooling pipes are provided. Each cooling pipe extends along the axial direction of the spindle (1) to form a series cooling circuit with a serpentine structure. The shaft assembly (2) includes: A copper sleeve (21) is coaxially sleeved outside the mandrel (1); A shaft (22) has a first cavity formed inside it. The copper sleeve (21) and the spindle (1) are coaxially arranged in the first cavity. A motor (23) is also arranged in the first cavity. The motor (23) is located above the copper sleeve (21). The motor (23) includes a stator (231) and a rotor (232) that cooperate with each other. The protruding outer edge (2311) of the stator (231) is placed on the top surface of the shaft (22). The rotor (232) is fixedly sleeved on the spindle (1). The shaft (22) and the protruding outer edge (2311) are provided with the cooling pipes. End cap (24), a portion of which is placed on the spindle (1) and another portion is placed on the protruding outer edge (2311). The water inlet pipe (31) and the water outlet pipe (33) are respectively spaced apart on the end cap (24). The shaft assembly (2) also includes: An upper air-blowing disc (25) is placed below the copper sleeve (21), and the upper air-blowing disc (25) is coaxially sleeved on the mandrel (1); The movable disc (26) is placed below the upper air-blowing disc (25). The movable disc (26) is coaxially sleeved on the spindle (1) and along the axial direction of the spindle (1), a portion of the top surface of the movable disc (26) abuts against the stepped surface of the spindle (1). The lower air-blowing plate (27) is placed below the movable plate (26), and the lower air-blowing plate (27) is coaxially sleeved on the spindle (1); The cover (28) is placed below the lower air-blowing disc (27), and the cover (28) is coaxially connected to the shaft (22); The base plate (29) is placed below the cover plate (28), the base plate (29) is sleeved on the spindle (1), and the base plate (29), the movable plate (26) and the spindle (1) are coaxially connected; The water system structure also includes a cooling water tank (35), which is arranged in a ring around the cover (28); the cooling pipes are provided in five parts, including: The first cooling pipe (321) has one end connected to the water inlet pipe (31) and the other end connected to the cooling water tank (35). The second cooling pipe (322) is connected at one end to the cooling water tank (35); A third cooling pipe (323) is connected at one end to the other end of the second cooling pipe (322); A fourth cooling pipe (324), one end of which is connected to the other end of the third cooling pipe (323); The fifth cooling pipe (325) is connected at one end to the other end of the fourth cooling pipe (324), and at the other end of the fifth cooling pipe (325) is connected to the water outlet pipe (33). Along the axial direction of the mandrel (1), the lengths of the first cooling pipe (321), the third cooling pipe (323), the fourth cooling pipe (324), and the fifth cooling pipe (325) gradually decrease, and the length of the first cooling pipe (321) is equal to the length of the second cooling pipe (322).

2. The air-floating main shaft with a water channel structure as described in claim 1, characterized in that, The second cooling pipe (322) is connected to the third cooling pipe (323), the third cooling pipe (323) is connected to the fourth cooling pipe (324), and the fourth cooling pipe (324) is connected to the fifth cooling pipe (325). The first branch is arranged along the circumference of the mandrel (1).

3. The air-floating main shaft with a water channel structure as described in claim 1, characterized in that, The waterway structure also includes: The second branch (34) is disposed on the shaft (22). The second branch (34) extends radially along the spindle (1). The first cooling pipe (321), the second cooling pipe (322), the third cooling pipe (323), the fourth cooling pipe (324) and the fifth cooling pipe (325) are respectively connected to the second branch (34).

4. The air-floating main shaft with a water channel structure as described in any one of claims 1-3, characterized in that, The mandrel (1) has a second cavity (11) extending along the Z-axis inside; the shaft assembly (2) also includes: The cover plate (241) is snapped onto the end cap (24); A water inlet pipe (201) is installed on the cover plate (241). One end of the water inlet pipe (201) is located outside the cover plate (241), and the other end of the water inlet pipe (201) is inserted into the second cavity (11). The water inlet pipe (201) is used to supply cutting fluid into the second cavity (11).

5. The air-floating main shaft with a water channel structure as described in claim 4, characterized in that, The shaft assembly (2) also includes: A plug (202) is installed on the bottom end of the spindle (1) where the water inlet pipe (201) is not located; A liquid supply passage is provided near the plug (202). A part of the liquid supply passage is provided on the mandrel (1), and another part of the liquid supply passage is provided on the base plate (29) and between the base plate (29) and the mandrel (1). The two ends of the liquid supply passage are respectively connected to the bottom end face of the second cavity (11) and the base plate (29).

6. The air-floating main shaft with a water channel structure as described in claim 5, characterized in that, The liquid supply path includes: The first passage (203) is provided near the plug (202), and the spindle (1) is provided with the first passage (203), and the first passage (203) is connected to the second cavity (11); The second passage (204) is disposed between the base plate (29) and the spindle (1), and one end of the second passage (204) is connected to the first passage (203); The first water passage (205) is disposed inside the base plate (29), the first water passage (205) extends radially along the mandrel (1), and the other end of the second passage (204) is connected to the first water passage (205); The second water passage is provided on the base plate (29) and extends through the bottom end face of the base plate (29). The second water passage extends along the axial direction of the spindle (1) and communicates with the first water passage (205).

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