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

Abstract

The utility model discloses a tool for air flotation internal grinding machining of a mechanical spindle body, and relates to the technical field of internal grinding machining of the mechanical spindle 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 utility model 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 through air floating internal grinding. Background Art

[0002] At present, the internal bore grinding of mechanical spindle bodies is one of the key technologies in the field of mechanical manufacturing, and 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 spindle's internal bore directly affects the overall performance of the machine tool. Therefore, the internal bore grinding technology needs to be continuously optimized and innovated. In internal bore grinding, commonly used methods include drilling, reaming, boring, grinding, etc., among which grinding is a 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 machining quality and efficiency. In addition, with the development of the manufacturing industry, the requirements for the machining accuracy and efficiency of the spindle body internal bore are constantly increasing, which has promoted the continuous innovation and progress of internal bore grinding technology, such as the use of high-precision grinding equipment and advanced grinding processes. At present, the inner hole grinding method of mechanical spindle body adopts disk adsorption and center frame processing. This processing method has extremely high technical requirements for the 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. Utility Model Content

[0003] In order to solve the above problems, the utility model aims to provide an air-floating internal grinding tooling for a mechanical spindle body, particularly an air-floating tooling for high-precision and high-efficiency static pressure suspension internal grinding 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:

[0005] The dovetail base plate is bolted to the bottom plate of the internal grinding machine to provide a stable support foundation;

[0006] The mechanical spindle body, which serves as the main body to be processed or tested;

[0007] Air floatation tooling, precise positioning and air floatation support system for the mechanical spindle body;

[0008] The clamping buffer assembly is installed between two sets of air flotation tooling to provide additional clamping buffer and support.

[0009] 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 through 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.

[0010] Furthermore, one end of the quick clamp is connected to the end cover by a bolt, and the other end is also connected to the base by a bolt. 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.

[0011] 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.

[0012] Furthermore, an air flotation inner hole is provided in the middle of 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 provided on the inner wall of the air flotation inner hole of the base; a damping plug is provided radially in the exhaust hole, and an air inlet 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 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.

[0013] Furthermore, the end cover and the base are matched with each other through a mortise and tenon structure, the left and right sides of the end cover are provided with a tenon with a flange structure, the left and right sides of the base are provided with a tenon with a recessed structure, and the end cover and the base are matched with the tenon and tenon.

[0014] Furthermore, the left end face of the end cover is provided with a first positioning pin hole for connecting to the rotation positioning block, and the right end face is provided with a screw hole for connecting to the quick clamp. The left end face of the base is provided with a second positioning pin hole for connecting to the rotation positioning block, and the right end face is provided with a screw hole for connecting to the quick clamp. The end cover and the base are connected together by the rotation positioning block, the first positioning pin, the second positioning pin, the quick clamp and the screw. The end cover can be opened by rotating with the first positioning pin of the rotation positioning block as the center of the circle, which is convenient for clamping the mechanical spindle body.

[0015] Furthermore, the clamping buffer assembly is mounted on the dovetail base plate through a dovetail plate buckle;

[0016] The clamping buffer assembly includes a clamping buffer base, a clamping buffer lifting slider, 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.

[0017] 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, and 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, and the lower end of the clamping buffer lifting slider is provided with a slide rail that cooperates with the slide on the clamping buffer base. The clamping buffer lifting slider is provided with screw threads connected to the clamping buffer pull rod.

[0018] The utility model provides a tooling for the spindle body of an air-floating internal grinding machine. Compared with the prior art, it has the following beneficial effects:

[0019] 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 is circumferentially distributed with a number of exhaust holes. 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 holes. The square air groove is connected to the air inlet channel through a radial air inlet provided on the inner wall of the inner hole of the air flotation position of the base; a damping plug is provided in the radial direction of 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 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;

[0020] 2. In order to prevent the mechanical spindle body from damaging the air flotation 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. The clamping buffer lifting slider also drives the clamping buffer V-type seat to rise when climbing, and When the machine body is rotated, the outer circle of the machine body first contacts 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 damage to the air flotation inner hole accuracy of the air flotation tooling due to direct clamping of the machine body, greatly extends 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.

[0021] 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, and meets the application requirements of high precision and high speed. It can stably process at high speed for a long time, its lateral force is increased, the rigidity is strengthened, and the side grinding ability is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the clamping and buffering of the air-floating internal grinding tooling of the utility model.

[0023] Figure 2 This is a schematic diagram of the air flotation internal grinding tooling of the utility model.

[0024] Figure 3 This is a structural diagram of the air-floating internal grinding tooling of the utility model.

[0025] Figure 4 This is a structural diagram of the end cover of the air-floating internal grinding tooling of the utility model.

[0026] Figure 5 This is a structural diagram of the air-floating internal grinding tooling base of the utility model.

[0027] Figure 6 This is a structural diagram of the air-floating internal grinding tooling buffer assembly of the utility model.

[0028] Figure 7 This is a cross-sectional view of the internal structure of the air-floating internal grinding tooling buffer assembly of the utility model.

[0029] Figure 8This is a structural diagram of the lifting slide block of the air-floating internal grinding tooling buffer assembly of the utility model.

[0030] Figure 9 This is a structural diagram of the lifting base of the air-floating internal grinding tooling buffer assembly of the utility model.

[0031] In the figure: 1. Dovetail base plate; 2. Mechanical spindle body; 3. Air flotation tooling; 4. End cover; 5. Base; 6. Rotary 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 slider; 22. Clamping buffer V-shaped 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. Slide; 31. Slide rail. DETAILED DESCRIPTION

[0032] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-9 The utility model 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 internal grinding machine bed plate by bolts;

[0034] 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 joint 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 joint 13 are installed on the base 5. The first positioning pin 7, the quick clamp 10, and the quick air joint 13 are installed on the end cover 4. One end of the quick clamp 10 is connected to the end cover 4 through a bolt, and the other end is also connected to the base 5 through a bolt. 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;

[0035] 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.

[0036] 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 the 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.

[0037] 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 several 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 in the exhaust hole, and the damping plug 16 is provided with an air inlet 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 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.

[0038] 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.

[0039] Among them, the left end face of the end cover 4 is provided with a first positioning pin 7 hole for connecting to the rotation positioning block 6, and the right end face is provided with a screw hole for connecting to the quick clamp 10; the left end face of the base 5 is provided with a second positioning pin 8 hole for connecting to the rotation positioning block 6, and the right end face is provided with a screw hole for connecting 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 screws. The end cover 5 can be opened by rotating with the first positioning pin 7 of the rotation positioning block 6 as the center of the circle, which is convenient for clamping the mechanical spindle body 2.

[0040] Among them, the clamping buffer assembly 19 is installed between the two sets of air flotation tooling 3, and is fixed to the dovetail plate 1 through the dovetail plate groove and 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, and 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 slide 30, and the lower end of the clamping buffer lifting slider 21 is provided with a slide rail 31 that matches the slide 30 on the clamping buffer base 20. The clamping buffer lifting slider 21 is provided with screw threads connected to the clamping buffer pull rod 25.

[0041] The utility model is a tool for the inner hole of the spindle body of an air-static suspension internal grinding machine. The dovetail base plate is installed on the bottom plate of the internal grinding machine by bolts. Two sets of air-floating tooling 3 are fixed to the dovetail plate 1 by the dovetail plate groove and the 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 tenon 14 of a flange structure, and the left and right sides of the base 5 are provided with a tenon 15 of a notch structure. The end cover 4 and the base 5 are connected by the tenon 14 and the tenon 15. In coordination, the left end face of the end cover 4 is provided with a first positioning pin 7 hole for connecting to the rotation positioning block 6, and the right end face is provided with a screw hole for connecting to the quick clamp 10; the left end face of the base 5 is provided with a second positioning pin 8 hole for connecting to the rotation positioning block 6, and the right end face is provided with a screw hole for connecting 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, and the end cover 4 can be opened by rotating with the first positioning pin 7 of the rotation positioning block 6 as the center, which is convenient for clamping the mechanical spindle body.

[0042] 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 provided on the inner wall of the air flotation inner hole of the base; a damping plug 16 is provided radially in the exhaust hole, and the damping plug 16 is provided with an air inlet 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 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.

[0043] The utility model 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 and 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 slide 30 is provided at the upper end of the clamping buffer base 20, and a slide rail 31 that cooperates with the slide 30 on the clamping buffer base 20 is provided at the lower end of the clamping buffer lifting slider 21. A screw thread is provided in the clamping buffer lifting slider 21 and is connected to the clamping buffer pull rod 25.

[0044] 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 outer circle of the body first contacts the clamping buffer V-shaped seat 22, and under the action of the threads of the clamping buffer pull rod 25 and the weight of the body itself, the clamping buffer V-shaped seat 22 and The clamping buffer lifting slider 21 moves downward on the clamping buffer base 20 slide, 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 extends the service life of the air flotation tooling 3, reduces the clamping time of the machine body and enhances the processing 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. Its damping is greatly reduced, which improves the stability, processing accuracy and processing efficiency of the machine body, and realizes the application requirements of high precision and high speed. It can be stably processed at high speed for a long time. Its lateral force is increased, its rigidity is enhanced, and the side grinding ability is improved to a certain extent.

[0045] During operation, an aerostatic suspension internal grinding machine is used to machine the inner bore of the mechanical spindle. Air is used as the lubricant, and the mechanical spindle body (2) does not come into direct contact with the tooling, easily achieving high rotational speeds without generating excessive heat. A high-precision CNC internal grinding machine is used, achieving high spindle rotation accuracy and very low radial runout, which helps improve the roundness and cylindricity of the inner bore of the mechanical spindle body (2). The grinding wheel's grinding cycle feed is controlled by a servo motor via system commands, ensuring excellent stability. The grinding head speed is infinitely variable and can be adjusted during the machining process based on the state of the mechanical spindle body (2). The cutting fluid is a mixture of water and emulsified oil, and its temperature is directly determined by the cooling water temperature of the chiller via a water temperature sensor, effectively cooling the part and ensuring stability during machining. The machining program directly controls its dimensions, feed rate, and cycle count, reducing surface roughness. The machine tool spindle can automatically adjust its position in minute arc seconds, effectively addressing the issue of perpendicularity between the inner bore and the end face.

[0046] The working principle of this utility model is to use a hydrostatically suspended internal grinding machine to process the inner bore of the mechanical spindle body, using air as the lubricant. The mechanical spindle body does not come into direct contact with the tooling, allowing it to easily reach high rotational speeds without generating excessive heat. Compressed air enters the air intake passages of the air flotation tooling end cap and base through a quick air connector. From the intake passages, it then enters a number of circumferentially distributed exhaust holes. A damping plug and a square air groove are provided at the end of the intake passages. Compressed air then enters the damping plug and square air nozzle through the exhaust holes, filling the air flotation gap between the outer diameter of the mechanical spindle body 2 and the air flotation tooling 3. This improves the internal grinding machine clamping efficiency, machining accuracy, and processing efficiency of the mechanical spindle body, ensuring the grinding wheel can operate stably for extended periods of time and significantly reducing product clamping time.

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 support base; A mechanical spindle body (2), serving as the main body to be processed or tested; Air-floating fixture (3), precise positioning and air-floating support system for 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 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); 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 a bolt, and the other end is also connected to the base (5) via a bolt. 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, 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 number of exhaust holes distributed circumferentially. The inner side 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 the damping plug (16) is provided with an air inlet connected to the mounting hole, a throttle hole connected to the inner side end of the air inlet hole, and a stabilization chamber connected to the inner side end of the throttle hole 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 side 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, 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) with flange structures. The left and right sides of the base (5) are provided with tenons (15) with recessed structures. 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, characterized in that: The left end surface of the end cover (4) is provided with a first positioning pin (7) hole for connecting to the rotation positioning block (6), and the right end surface is provided with a screw hole for connecting to the quick clamp (10). The left end surface of the base (5) is provided with a second positioning pin (8) hole for connecting to the rotation positioning block (6), and the right end surface is provided with a screw hole for connecting 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 screw. 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 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 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, 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) that matches 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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