Tool for air floatation internal grinding machining of mechanical main shaft machine body

Abstract

The invention discloses a tool for air flotation internal grinding machining of a mechanical main shaft machine body, and relates to the technical field of internal grinding machining of the mechanical main shaft machine body, the tool comprises a dovetail bottom plate, an air flotation tool and a clamping buffer assembly, the dovetail bottom plate is installed on an internal grinding machine tool bottom plate through bolts, a stable supporting foundation is provided, and the air flotation tool is installed on the dovetail bottom plate; according to the precise positioning and air floatation supporting system for the mechanical main shaft machine body, the clamping buffering assembly is installed between the two sets of air floatation tools and provides additional clamping buffering and supporting, novel air floatation machining is adopted for the tool, an air floatation main shaft inner hole and an air inlet channel are formed, an exhaust hole extends to an air floatation gap through a damping plug, and the stability is enhanced through the conical design of a stabilizing chamber; the clamping buffering assembly is designed to prevent collision, buffering clamping is achieved through threaded connection and rail climbing, the air flotation tool is prevented from being damaged, the service life is prolonged, the clamping time is shortened, and the machining precision and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of internal grinding processing of a mechanical spindle body, in particular to a tool for processing a mechanical spindle body with air floating internal grinding. Background Art

[0002] At present, the inner hole grinding of mechanical spindle bodies is one of the key technologies in the field of mechanical manufacturing, which is of great significance for improving the machining accuracy and efficiency of machine tools. As the core component of the machine tool, the machining quality of the inner hole of the spindle directly affects the overall performance of the machine tool. Therefore, the inner hole grinding processing technology needs to be continuously optimized and innovated. In the inner hole grinding process, the commonly used methods include drilling, reaming, boring, grinding, etc., among which grinding is the key step to achieve high precision and high-quality surface. During the grinding process, parameters such as grinding force, grinding speed and feed rate need to be precisely controlled to ensure the machining quality and efficiency. In addition, with the development of the manufacturing industry, the requirements for the machining accuracy and efficiency of the inner hole of the spindle body are constantly improving, which has promoted the continuous innovation and progress of the inner hole grinding processing technology, such as the use of high-precision grinding equipment and advanced grinding processes. At present, the inner hole grinding machine processing method of mechanical spindle adopts the method of magnetic disk adsorption and center frame processing. This processing method has extremely high technical requirements for processing personnel, and the outer circle of the body needs to be calibrated within 0.003mm during clamping. This clamping method is inefficient and greatly reduces production efficiency. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to provide a tooling for air-floating internal grinding machining of a mechanical spindle body, particularly a high-precision and high-efficiency air-floating tooling for air-static pressure suspension internal grinding machining that is easy to install and maintain.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a tooling for an air-floating internal grinding machine spindle body, comprising: The dovetail base plate is bolted to the bottom plate of the internal grinding machine to provide a stable support foundation; The mechanical spindle body, as the main body to be processed or tested; Air-floating fixture, precise positioning and air-floating support system for the mechanical spindle body; The clamping buffer assembly is installed between two sets of air flotation tooling to provide additional clamping buffer and support.

[0005] Furthermore, the air flotation tooling includes an end cover, a base, a rotation positioning block, a first positioning pin, a second positioning pin, a first cylindrical head screw, a quick clamp, a quick air connector, and a damping plug. The base is fixed to the dovetail base plate by a dovetail plate buckle and a second cylindrical head screw. The end cover is above the base. The rotation positioning block, the second positioning pin, the quick clamp, and the quick air connector are installed on the base. The first positioning pin, the quick clamp, and the quick air connector are installed on the end cover.

[0006] Furthermore, one end of the quick clamp is connected to the end cover by bolts, and the other end is also connected to the base by bolts. One end of the rotation positioning block is connected to the end cover by a first positioning pin, and the other end is connected to the base by a second positioning pin.

[0007] Furthermore, the base is provided with a dovetail plate groove and a dovetail plate buckle groove, and the air flotation tooling is tightly combined with the dovetail plate buckle and the second cylindrical head screw through the dovetail plate groove and the dovetail plate buckle groove.

[0008] Furthermore, an air flotation inner hole is provided between the end cover and the base, and an air inlet channel is provided inside. Each row of air inlet channels has a number of exhaust holes distributed circumferentially. The inner end of the air inlet channel extends to the air flotation inner hole and is provided with a square air groove connected to the exhaust holes. The square air groove is connected to the air inlet channel through a radial air inlet hole provided on the inner wall of the air flotation inner hole of the base; a damping plug is provided radially inside the exhaust hole, and an air inlet hole connected to the mounting hole, a throttle hole connected to the inner end of the air inlet hole, and a stabilization chamber connected to the inner end of the throttle hole are provided on the damping plug in sequence from the inlet to the outlet; the stabilization chamber is opened on a side of the damping plug close to the outer wall of the mechanical spindle body, and the stabilization chamber is in the shape of a conical horn with a diameter gradually increasing from the outside to the inside, and the inner end of the stabilization chamber is connected to the air flotation gap between the mechanical spindle body and the air flotation tooling.

[0009] Furthermore, the end cover and the base are matched with each other through a mortise and tenon structure, the end cover is provided with a tenon with a flange structure on the left and right sides, the base is provided with a tenon with a recessed structure on the left and right sides, and the end cover and the base are matched with the tenon and the tenon.

[0010] Furthermore, the left end face of the end cover is provided with a first positioning pin hole for connecting to a rotation positioning block, and the right end face is provided with a screw hole for connecting to a quick clamp. The left end face of the base is provided with a second positioning pin hole for connecting to a rotation positioning block, and the right end face is provided with a screw hole for connecting to a quick clamp. The end cover and the base are connected together by a rotation positioning block, a first positioning pin, a second positioning pin, a quick clamp and a screw. The end cover can be opened by rotating with the first positioning pin of the rotation positioning block as the center, so as to facilitate clamping of the mechanical spindle body.

[0011] Furthermore, the clamping buffer assembly is mounted on the dovetail base plate through a dovetail plate buckle; The clamping buffer assembly includes a clamping buffer base, a clamping buffer lifting slide block, a clamping buffer V-shaped seat, a clamping buffer left positioning block, a clamping buffer right positioning block, a clamping buffer pull rod, an end face bearing, a clamping buffer pull rod positioning block, a clamping buffer left connecting block, and a clamping buffer right connecting block.

[0012] Furthermore, the clamping buffer lifting slider is installed on the upper end of the clamping buffer base, the clamping buffer left positioning block is installed on the left side, the clamping buffer right positioning block and the clamping buffer pull rod positioning block are installed on the right side, the clamping buffer left connecting block is installed on the upper left of the clamping buffer lifting slider, the clamping buffer right connecting block is installed on the upper right, and the clamping buffer V-shaped seat is installed directly above, the upper end of the clamping buffer base is provided with a slide way, the lower end of the clamping buffer lifting slider is provided with a slide rail matching the slide way on the clamping buffer base, and the clamping buffer lifting slider is provided with a screw thread connected to the clamping buffer pull rod.

[0013] The present invention provides a tooling for an air-floating internal grinding machine spindle body. Compared with the prior art, it has the following beneficial effects: 1. A new type of air flotation processing method is adopted. An inner hole of the outer circle of the air flotation mechanical spindle is provided between the end cover and the base, and an air inlet channel is provided inside. Each row of air inlet channels has a number of exhaust holes distributed circumferentially. The inner end of the air inlet channel extends to the inner hole of the air flotation position and is provided with a square air groove connected to the exhaust hole. The square air groove is connected to the air inlet channel through a radial air inlet hole provided on the inner wall of the inner hole of the air flotation position of the base; a damping plug is provided radially inside the exhaust hole, and an air inlet hole connected to the mounting hole, a throttle hole connected to the inner end of the air inlet hole, and a stabilization chamber connected to the inner end of the throttle hole are provided on the damping plug in sequence from the inlet to the outlet; the stabilization chamber is opened on a side of the damping plug close to the outer wall of the mechanical spindle body, and the stabilization chamber is in the shape of a cone trumpet with a diameter gradually increasing from the outside to the inside, and the inner end of the stabilization chamber is connected to the air flotation gap between the mechanical spindle body and the air flotation tooling; 2. In order to prevent the mechanical spindle body from damaging the air-floating tooling during clamping, a clamping buffer assembly is specially designed. A threaded connection is set on the outer circle of the pull rod and the clamping buffer lifting slider. A sliding climbing track is set on the upper end surface of the clamping buffer base and the lower end surface of the clamping buffer lifting slider. Under the rotation of the pull rod, the clamping buffer lifting slider is driven by the thread to climb on the slideway of the clamping buffer base; the clamping buffer V-type seat is connected to the upper end surface of the clamping buffer lifting slider by bolts. When the clamping buffer lifting slider climbs, it also drives the clamping buffer V-type seat to rise. When the machine body is moved, the first thing that the outer circle of the machine body contacts is the clamping buffer V-type seat. Under the action of the tie rod thread and the deadweight of the machine body, the clamping buffer V-type seat and the clamping buffer lifting slide block move downward on the clamping buffer base slideway, move to the outer circle of the machine body and contact the base of the air flotation tooling, and then the tie rod thread rotates to lower the clamping buffer V-type seat to a safe distance. This avoids the damage to the air flotation inner hole accuracy of the air flotation tooling due to direct clamping of the machine body, greatly prolongs the service life of the air flotation tooling, reduces the clamping time of the machine body, and enhances the machining accuracy of the machine body. 3. The front and rear bearings of the machine body are in a suspended state through air flotation. At this time, there is only air resistance which is much smaller than mechanical friction. The damping is greatly reduced, which improves the stability, processing accuracy and processing efficiency of the machine body, realizes the application requirements of high precision and high speed, and can stably process at high speed for a long time. The lateral force is increased, the rigidity is strengthened, and the side grinding ability is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the clamping and buffering of the air-floating internal grinding tooling of the present invention.

[0015] Figure 2 It is a schematic diagram of the air-floating internal grinding tooling of the present invention.

[0016] Figure 3 It is a schematic structural diagram of the air-floating internal grinding tooling of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the end cover of the air-floating internal grinding tooling of the present invention.

[0018] Figure 5 It is a structural schematic diagram of the air-floating internal grinding tooling base of the present invention.

[0019] Figure 6 It is a structural schematic diagram of the air-floating internal grinding tooling buffer assembly of the present invention.

[0020] Figure 7 It is a cross-sectional view of the internal structure of the air-floating internal grinding tooling buffer assembly of the present invention.

[0021] Figure 8 It is a structural schematic diagram of the lifting slide block of the air-floating inner grinding tooling buffer assembly of the present invention.

[0022] Fig. 9 It is a structural schematic diagram of the lifting base of the air-floating internal grinding tooling buffer assembly of the present invention.

[0023] In the figure: 1. dovetail base plate; 2. mechanical spindle body; 3. air flotation tooling; 4. end cover; 5. base; 6. rotation positioning block; 7. first positioning pin; 8. second positioning pin; 9. first cylindrical head screw; 10. quick clamp; 11. dovetail plate buckle; 12. second cylindrical head screw; 13. quick air connector; 14. tenon; 15. tenon; 16. damping plug; 17. square air groove; 18. dovetail plate buckle groove; 19. clamping buffer assembly; 20. clamping buffer base; 21. clamping buffer lifting slide block; 22. clamping buffer V-type seat; 23. clamping buffer left positioning block; 24. clamping buffer right positioning block; 25. clamping buffer pull rod; 26. end bearing; 27. clamping buffer pull rod positioning block; 28. clamping buffer left connecting block; 29. ​​clamping buffer right connecting block; 30. slideway; 31. slide rail. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-9 , the present invention provides a technical solution: a tooling for an air-floating internal grinding machine spindle body, comprising a dovetail base plate 1, a machine spindle body 2, an air-floating tooling 3, and a dovetail plate buckle 11. The dovetail base plate 1 is mounted on the bottom plate of the internal grinding machine bed by bolts; The air flotation tooling 3 includes: an end cover 4, a base 5, a rotation positioning block 6, a first positioning pin 7, a second positioning pin 8, a first cylindrical head screw 9, a quick clamp 10, a quick air connector 13, and a damping plug 16. The base 5 is fixed to the dovetail base plate 1 through a dovetail plate buckle 11 and a second cylindrical head screw 12. The end cover 4 is above the base 5. The rotation positioning block 6, the second positioning pin 8, the quick clamp 10, and the quick air connector 13 are installed on the base 5. The first positioning pin 7, the quick clamp 10, and the quick air connector 13 are installed on the end cover 4. One end of the quick clamp 10 is connected to the end cover 4 through bolts, and the other end is also connected to the base 5 through bolts. One end of the rotation positioning block 6 is connected to the end cover 4 through the first positioning pin 7, and the other end is connected to the base 5 through the second positioning pin 8. The clamping buffer assembly 19 is installed between the two sets of air flotation tooling 3 and is installed on the dovetail base plate 1 through the dovetail plate buckle 11; The clamping buffer assembly 19 includes: a clamping buffer base 20, a clamping buffer lifting slider 21, a clamping buffer V-shaped seat 22, a clamping buffer left positioning block 23, a clamping buffer right positioning block 24, a clamping buffer pull rod 25, an end face bearing 26, a clamping buffer pull rod positioning block 27, a clamping buffer left connecting block 28, and a clamping buffer right connecting block 29.

[0026] Among them, the dovetail base plate 1 is installed on the bottom plate of the internal grinding machine by bolts, the air flotation tooling 3 includes an end cover 4 and a base 5, the base 5 is provided with a dovetail plate groove and a dovetail plate buckle groove 18, and two sets of air flotation tooling 3 are fixed to the dovetail plate 1 through the dovetail plate groove and dovetail plate buckle groove 18 on the base 5 and the dovetail plate buckle 11 and the second cylindrical head screw 12.

[0027] Among them, an air flotation inner hole is provided between the end cover 4 and the base 5, and an air inlet channel is provided inside. Each row of air inlet channels has a number of exhaust holes distributed circumferentially. The inner end of the air inlet channel extends to the air flotation inner hole and is provided with a square air groove 17 connected to the exhaust hole. The square air groove 17 is connected to the air inlet channel through a radial air inlet hole provided on the inner wall of the air flotation inner hole of the base; a damping plug 16 is provided radially inside the exhaust hole, and an air inlet hole connected to the mounting hole, a throttle hole connected to the inner end of the air inlet hole, and a stabilization chamber connected to the inner end of the throttle hole are provided on the damping plug 16 in sequence from the inlet to the outlet; the stabilization chamber is opened on a side of the damping plug 16 close to the outer wall of the mechanical spindle body 2, and the stabilization chamber is in the shape of a cone horn with a diameter gradually increasing from the outside to the inside, and the inner end of the stabilization chamber is connected to the air flotation gap between the mechanical spindle body 2 and the air flotation tooling 3.

[0028] Among them, the end cover 4 and the base 5 are matched with each other through a mortise and tenon structure. The left and right sides of the end cover 4 are provided with a tenon 14 of a flange structure, and the left and right sides of the base 5 are provided with a tenon 15 of a recessed structure. The end cover 4 and the base 5 are matched with the tenon 14 and the tenon 15.

[0029] Among them, the left end face of the end cover 4 is provided with a first positioning pin 7 hole connected to the rotation positioning block 6, and the right end face is provided with a screw hole connected to the quick clamp 10; the left end face of the base 5 is provided with a second positioning pin 8 hole connected to the rotation positioning block 6, and the right end face is provided with a screw hole connected to the quick clamp 10; the end cover 4 and the base 5 are connected together by the rotation positioning block 6, the first positioning pin 7, the second positioning pin 8, the quick clamp and the screw. The end cover 5 can be opened by rotating with the first positioning pin 7 of the rotation positioning block 6 as the center, so as to facilitate the clamping of the mechanical spindle body 2.

[0030] Among them, the clamping buffer assembly 19 is installed between two sets of air flotation tooling 3, and is fixed to the dovetail plate 1 through the dovetail plate groove and the dovetail plate buckle groove 18 on the clamping buffer base 20 and the dovetail plate buckle 11 and the second cylindrical head screw 12. The clamping buffer lifting slider 21 is installed on the upper end of the clamping buffer base 20, the clamping buffer left positioning block 23 is installed on the left side, the clamping buffer right positioning block 24 and the clamping buffer pull rod positioning block 27 are installed on the right side, the clamping buffer left connecting block 28 is installed on the upper left of the clamping buffer lifting slider 21, the clamping buffer right connecting block 29 is installed on the upper right, and the clamping buffer V-shaped seat 22 is installed directly above. A slideway 30 is provided on the upper end of the clamping buffer base 20, and a slide rail 31 matching the slideway 30 on the clamping buffer base 20 is provided at the lower end of the clamping buffer lifting slider 21. The clamping buffer lifting slider 21 is provided with a screw thread connected to the clamping buffer pull rod 25.

[0031] The present invention is a gas static pressure suspension type internal grinding machine spindle body inner hole tooling, the dovetail bottom plate is installed on the bottom plate of the internal grinding machine by bolts, two sets of air floating tooling 3 are fixed on the dovetail plate 1 by the dovetail plate groove and dovetail plate buckle groove 18 on the base 5 and the dovetail plate buckle 11 and the second cylindrical head screw 12, the end cover 4 is matched with the mortise and tenon structure above the base 5, the left and right sides of the end cover 4 are provided with a flange structure of the tenon 14, the left and right sides of the base 5 are provided with a notch structure of the tenon 15, the end cover 4 and the base 5 are matched by the tenon 14 and the tenon 15 The left end face of the end cover 4 is provided with a first locating pin 7 hole connected to the rotation positioning block 6, and the right end face is provided with a screw hole connected to the quick clamp 10; the left end face of the base 5 is provided with a second locating pin 8 hole connected to the rotation positioning block 6, and the right end face is provided with a screw hole connected to the quick clamp 10; the end cover 4 and the base 5 are connected together by the rotation positioning block 6, the first locating pin 7, the second locating pin 8, the quick clamp 10 and the screws, and the end cover 4 can be opened by rotating with the first locating pin 7 of the rotation positioning block 6 as the center, so as to facilitate the clamping of the mechanical spindle body.

[0032] Secondly, an air flotation inner hole is provided between the end cover 4 and the base 5, and an air inlet channel is provided inside. Each row of air inlet channels has a number of exhaust holes distributed circumferentially. The inner end of the air inlet channel extends to the air flotation inner hole and is provided with a square air groove 17 connected to the exhaust hole. The square air groove 17 is connected to the air inlet channel through a radial air inlet hole provided on the inner wall of the air flotation inner hole of the base; a damping plug 16 is provided radially inside the exhaust hole, and an air inlet hole connected to the mounting hole, a throttle hole connected to the inner end of the air inlet hole, and a stabilization chamber connected to the inner end of the throttle hole are provided on the damping plug 16 in sequence from the inlet to the outlet; the stabilization chamber is opened on a side of the damping plug 16 close to the outer wall of the mechanical spindle body 2, and the stabilization chamber is in the shape of a conical trumpet with a diameter gradually increasing from the outside to the inside, and the inner end of the stabilization chamber is connected to the air flotation gap between the mechanical spindle body 2 and the air flotation tooling 3.

[0033] The present invention provides a clamping buffer assembly 19 between the two sets of the air flotation tooling 3, which is fixed to the dovetail plate 1 through the dovetail plate groove and the dovetail plate buckle groove 18 on the clamping buffer base 20, the dovetail plate buckle 11, and the second cylindrical head screw 12. A clamping buffer lifting slider 21 is installed on the upper end of the clamping buffer base 20, a clamping buffer left positioning block 23 is installed on the left side, and a clamping buffer right positioning block 24 and a clamping buffer pull rod positioning block 27 are installed on the right side. A clamping buffer left connecting block 28 is installed on the upper left of the clamping buffer lifting slider 21, a clamping buffer right connecting block 29 is installed on the upper right, and a clamping buffer V-shaped seat 22 is installed directly above. A slideway 30 is provided on the upper end of the clamping buffer base 20, and a slide rail 31 matching the slideway 30 on the clamping buffer base 20 is provided at the lower end of the clamping buffer lifting slider 21. A screw thread is arranged inside the clamping buffer lifting slider 21 and is connected to the clamping buffer pull rod 25.

[0034] In addition, in order to prevent the mechanical spindle body 2 from damaging the air flotation tooling 3 during clamping, a clamping buffer assembly 19 is specially designed, and a threaded connection is set on the outer circle of the clamping buffer pull rod 25 and the clamping buffer lifting slide block 21, and a sliding climbing track is set on the upper end surface of the clamping buffer base 20 and the lower end surface of the clamping buffer lifting slide block 21. Under the rotation of the clamping buffer pull rod 25, the clamping buffer lifting slide block 21 is driven to climb on the slideway of the clamping buffer base 20 through the thread; the clamping buffer V-shaped seat 22 is connected to the upper end surface of the clamping buffer lifting slide block 21 by bolts, and the clamping buffer lifting slide block 21 also drives the clamping buffer V-shaped seat 22 to rise during the climbing movement. When clamping the mechanical spindle body 2, the first thing that the outer circle of the body contacts is the clamping buffer V-shaped seat 22, and under the action of the thread of the clamping buffer pull rod 25 and the body's own weight, the clamping buffer V-shaped seat 22 and The clamping buffer lifting slider 21 moves downward on the slide of the clamping buffer base 20, moves to the outer circle of the machine body and contacts the base of the air flotation tooling 3, and then the clamping buffer V-shaped seat 22 is lowered to a safe distance through the self-rotation of the thread of the clamping buffer pull rod 25; this avoids the damage to the air flotation inner hole accuracy of the air flotation tooling 3 caused by direct clamping of the machine body, and also greatly prolongs the service life of the air flotation tooling 3, reduces the clamping time of the machine body and enhances the machining accuracy of the machine body. At the same time, the front and rear bearings of the machine body are in a suspended state through air flotation. At this time, there is only air resistance which is much smaller than mechanical friction, and its damping is greatly reduced, which improves the stability, machining accuracy and machining efficiency of the machine body, realizes the application requirements of high precision and high speed, and can be stably processed at high speed for a long time. Its lateral force is increased, its rigidity is enhanced, and its side grinding ability is improved to a certain extent.

[0035] During the working process, the inner hole of the mechanical spindle body is processed by gas static pressure suspension internal grinding, and air is used as the lubricating medium. The mechanical spindle body 2 does not directly contact the tooling, and can easily reach a high speed without generating too much heat; a high-precision CNC internal grinder is used, the spindle rotation accuracy is high, and the radial circle runout is very small, which is conducive to improving the roundness and cylindricity of the inner hole of the mechanical spindle body 2; the grinding wheel grinding cycle feed is controlled by the servo motor through the system command, and has good stability; the grinding head speed can be infinitely variable, and can be adjusted at any time according to the state of the mechanical spindle body 2 during the processing; the cutting fluid is a mixture of water and emulsified oil, and its temperature is directly provided by the cooling water temperature of the cooler through the water temperature sensor, which can better cool the parts, thereby ensuring the stability of the body during processing. The body processing program can directly control its size, feed amount and number of cycles, and reduce the surface roughness value. The processing machine tool spindle can automatically adjust the position with a tiny arc second, which solves the vertical accuracy problem of the inner hole and the end face very well.

[0036] The working principle of the present invention is: the inner hole of the mechanical spindle body is processed by using a gas static pressure suspension internal grinder, and air is used as a lubricating medium. The mechanical spindle body does not directly contact the tooling, and can easily reach a high speed without generating excessive heat; the compressed air enters the air intake channel of the air flotation tooling end cover and the base through the quick air joint, and then enters a number of exhaust holes distributed circumferentially from the air intake channel. A damping plug and a square air groove are provided at the end of the air intake channel, and the compressed air enters the damping plug and the square air nozzle from the exhaust hole, and the compressed air is in the air flotation gap between the outer circle of the mechanical spindle body 2 and the air flotation tooling 3. This improves the internal grinding clamping efficiency, processing accuracy and processing efficiency of the mechanical spindle body, ensures that the grinding wheel can work stably for a long time, and greatly reduces the clamping time of the product.

Claims

1. A tooling for an air-floating internal grinding machine spindle body, characterized in that: include: The dovetail base plate (1) is mounted on the bottom plate of the internal grinding machine by bolts to provide a stable supporting foundation; A mechanical spindle body (2), serving as the main body to be processed or tested; An air-floating tool (3) is used to precisely position and support the mechanical spindle body (2); The clamping buffer assembly (19) is installed between the two sets of air flotation tooling (3) to provide additional clamping buffer and support.

2. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 1 is characterized in that: The air flotation tooling (3) comprises an end cover (4), a base (5), a rotational positioning block (6), a first positioning pin (7), a second positioning pin (8), a first cylindrical head screw (9), a quick clamp (10), a quick air connector (13), and a damping plug (16); the base (5) is fixed to a dovetail base plate (1) via a dovetail plate buckle (11) and a second cylindrical head screw (12); the end cover (4) is above the base (5); the rotational positioning block (6), the second positioning pin (8), the quick clamp (10), and the quick air connector (13) are installed on the base (5); and the first positioning pin (7), the quick clamp (10), and the quick air connector (13) are installed on the end cover (4).

3. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 2 is characterized in that: One end of the quick clamp (10) is connected to the end cover (4) via bolts, and the other end is also connected to the base (5) via bolts; one end of the rotation positioning block (6) is connected to the end cover (4) via a first positioning pin (7), and the other end is connected to the base (5) via a second positioning pin (8).

4. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 2 is characterized in that: The base (5) is provided with a dovetail plate groove and a dovetail plate buckle groove (18), and the air-floating tooling (3) is tightly combined with the dovetail plate buckle (11) and the second cylindrical head screw (12) through the dovetail plate groove and the dovetail plate buckle groove (18).

5. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 2 is characterized in that: An air flotation inner hole is provided between the end cover (4) and the base (5), and an air inlet channel is provided inside. Each row of air inlet channels has a plurality of exhaust holes distributed circumferentially. The inner end of the air inlet channel extends to the air flotation inner hole and is provided with a square air groove (17) connected to the exhaust hole. The square air groove (17) is connected to the air inlet channel through a radial air inlet provided on the inner wall of the air flotation inner hole of the base; a damping plug (16) is provided radially inside the exhaust hole, and an air inlet hole connected to the mounting hole, a throttle hole connected to the inner end of the air inlet hole, and a stabilization chamber connected to the inner end of the throttle hole are provided on the damping plug (16) in sequence from the inlet to the outlet; the stabilization chamber is opened on a side of the damping plug (16) close to the outer wall of the mechanical spindle body (2), and the stabilization chamber is in the shape of a cone trumpet with a diameter gradually increasing from the outside to the inside, and the inner end of the stabilization chamber is connected to the air flotation gap between the mechanical spindle body (2) and the air flotation tooling (3).

6. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 2 is characterized in that: The end cover (4) and the base (5) are matched with each other through a mortise and tenon structure; the left and right sides of the end cover (4) are provided with tenons (14) of a flange structure; the left and right sides of the base (5) are provided with tenons (15) of a recess structure; the end cover (4) and the base (5) are matched with each other through the tenon (14) and the tenon (15).

7. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 2 is characterized in that: The left end surface of the end cover (4) is provided with a first positioning pin (7) hole connected to the rotation positioning block (6), and the right end surface is provided with a screw hole connected to the quick clamp (10); the left end surface of the base (5) is provided with a second positioning pin (8) hole connected to the rotation positioning block (6), and the right end surface is provided with a screw hole connected to the quick clamp (10); the end cover (4) and the base (5) are connected together by the rotation positioning block (6), the first positioning pin (7), the second positioning pin (8), the quick clamp (10) and the screws; the end cover (4) can be opened by rotating with the first positioning pin (7) of the rotation positioning block (6) as the center of the circle, so as to facilitate clamping of the mechanical spindle body (2).

8. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 1 is characterized in that: The clamping buffer assembly (19) is mounted on the dovetail base plate (1) via a dovetail plate buckle (11); The clamping buffer assembly (19) comprises a clamping buffer base (20), a clamping buffer lifting slide block (21), a clamping buffer V-shaped seat (22), a clamping buffer left positioning block (23), a clamping buffer right positioning block (24), a clamping buffer pull rod (25), an end face bearing (26), a clamping buffer pull rod positioning block (27), a clamping buffer left connecting block (28), and a clamping buffer right connecting block (29).

9. The tooling for the main shaft body of an air-floating internal grinding machine according to claim 8, characterized in that: The clamping buffer lifting slider (21) is installed at the upper end of the clamping buffer base (20), the clamping buffer left positioning block (23) is installed on the left side, the clamping buffer right positioning block (24) and the clamping buffer pull rod positioning block (27) are installed on the right side, the clamping buffer left connecting block (28) is installed on the upper left of the clamping buffer lifting slider (21), the clamping buffer right connecting block (29) is installed on the upper right, and the clamping buffer V-shaped seat (22) is installed directly above, the upper end of the clamping buffer base (20) is provided with a slideway (30), the lower end of the clamping buffer lifting slider (21) is provided with a slide rail (31) matched with the slideway (30) on the clamping buffer base (20), and the clamping buffer lifting slider (21) is provided with a screw thread connected to the clamping buffer pull rod (25).

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