A hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine

Abstract

The present invention discloses a hydrostatic numerically controlled horizontal spindle rotary table surface grinder, which includes a horizontal spindle rotary table grinder, a grinding mechanism, a rotary table mechanism and a hydrostatic mechanism. The grinding mechanism is located inside the horizontal spindle rotary table grinder, the rotary table mechanism is located inside the horizontal spindle rotary table grinder, and the hydrostatic mechanism is located on the top of the horizontal spindle rotary table grinder. The grinding mechanism includes a feed box, inside which a hydrostatic spindle housing is arranged. The inner wall of the hydrostatic spindle housing is fixedly connected with a hydrostatic inner bearing, the inner wall of the hydrostatic inner bearing is fixedly connected with a hydrostatic spindle clamping cylinder, and an external oil passage is opened on the inner wall of the hydrostatic inner bearing. By placing the workpiece on the electromagnetic rotary table, the electromagnetic rotary table is energized to generate a magnetic field to hold the workpiece, achieving the effect of fixing the workpiece. The hydrostatic oil passes through the oil passages inside the hydrostatic inner bearing and the hydrostatic spindle clamping cylinder to the gap between the hydrostatic spindle and the hydrostatic spindle clamping cylinder and the external oil passage, which plays the role of reducing friction and prolonging the service life at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and particularly relates to a hydrostatic numerically controlled horizontal spindle rotary table surface grinder. Background Art

[0002] The grinding head mechanism is a key component of a grinding machine. The grinding head is connected to a vertical lifting mechanism and cuts the workpiece through the high-speed rotation of the grinding wheel. Therefore, the structure and quality of the grinding head directly affect the grinding quality and productivity. With the development of the economy, the grinding industry has higher and higher requirements for the production efficiency, automation degree, and precision of grinding machines, and thus the requirements for grinding heads are also constantly increasing. In addition to the requirements of being light in weight, small in size, easy to manufacture, simple to adjust, convenient to maintain, and good in processability, which conform to the principle of being more, faster, better, and more economical, technically, the following requirements are also needed: First, further improve the rotational accuracy of the spindle and maintain stable and reliable operation within a large range of speed changes and loads; second, further improve the rigidity of the spindle bearing system; third, reduce vibration and lower temperature rise. The drive system of the grinding head is relatively simple, and the spindle and bearings are its key parts. Especially for bearings, without good bearings, the spindle cannot operate normally, and the existing grinding head mechanisms cannot well meet the above requirements. Summary of the Invention

[0003] The present invention provides a hydrostatic numerically controlled horizontal spindle rotary table surface grinder to solve the problems raised in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A hydrostatic numerically controlled horizontal spindle rotary table surface grinder, including a horizontal spindle rotary table grinding machine, a grinding mechanism, a turntable mechanism, and a hydrostatic mechanism. The grinding mechanism is located inside the horizontal spindle rotary table grinding machine, the turntable mechanism is located inside the horizontal spindle rotary table grinding machine, and the hydrostatic mechanism is located on the top of the horizontal spindle rotary table grinding machine.

[0005] The grinding mechanism includes a feed box. Inside the feed box, there is a hydrostatic shaft housing. The inner wall of the hydrostatic shaft housing is fixedly connected with a hydrostatic inner bearing. The inner wall of the hydrostatic inner bearing is fixedly connected with a hydrostatic shaft clamping cylinder. An external oil passage is opened on the inner wall of the hydrostatic inner bearing. Inside the hydrostatic shaft clamping cylinder, there is a hydrostatic spindle. An external bearing is fixedly installed inside the hydrostatic inner bearing, and a seal is fixedly installed on the inner wall of the hydrostatic inner bearing.

[0006] The turntable mechanism includes a turntable main shaft, an outer wall of the turntable main shaft is fixedly connected with a turntable support plate, a bottom of the turntable support plate is rotatably connected with a turntable housing, an outer wall of the turntable main shaft is fixedly connected with a cavity shaft, a bottom of the turntable housing is fixedly connected with a mixed-flow constant-pressure gas transmission structure, the mixed-flow constant-pressure gas transmission structure is rotatably connected with the cavity shaft, one end of the turntable main shaft is fixedly connected with a gear, a threaded rod is arranged on one side of the gear, a thread of the threaded rod is movably connected with teeth of the gear, one end of the threaded rod is provided with a rotary cylinder, and an output shaft of the rotary cylinder is fixedly connected with one end of the threaded rod.

[0007] The static pressure mechanism includes a fixed seat, an outer wall of the fixed seat is fixedly connected with a static pressure liquid feeder, a filter box is arranged on a top of the horizontal spindle surface grinder, a static pressure liquid tank is arranged on the top of the horizontal spindle surface grinder, a liquid supply pipe is arranged between the static pressure liquid feeder and a static pressure shaft housing, a liquid return pipe is arranged between the filter box and the static pressure shaft housing, a connecting pipe is communicated between the filter box and the static pressure liquid tank, and a liquid delivery pipe is communicated between the static pressure liquid tank and the static pressure liquid feeder.

[0008] Through the above technical solution, the effect of reducing friction is achieved. The static pressure liquid feeder supplies static pressure oil into the static pressure shaft housing through the liquid supply pipe. The static pressure oil passes through the oil circuits inside the static pressure inner bearing and the static pressure shaft clamping cylinder to the gap between the static pressure main shaft and the static pressure shaft clamping cylinder and the outer oil circuit, achieving the effect of reducing friction, improving the machining accuracy, and prolonging the service life at the same time.

[0009] Preferably, an outer wall of the feed box is fixedly connected with a grinding wheel protective shell, the static pressure main shaft penetrates through the feed box and is rotatably connected with the grinding wheel protective shell, one end of the static pressure main shaft is fixedly connected with a limiting member, a rotating shaft is rotatably connected to an inner wall of the grinding wheel protective shell, a transmission belt is connected between the rotating shaft and the limiting member in a transmission manner, a grinding wheel is fixedly connected to an outer wall of the rotating shaft, a grinding motor is fixedly connected to an inner wall of the feed box, and an output shaft of the grinding motor is fixedly connected with the static pressure main shaft.

[0010] Through the above technical solution, the function of transmission is achieved. The output shaft of the grinding motor drives the static pressure main shaft to rotate, and a transmission belt is connected between the rotating shaft and the limiting member in a transmission manner, so that the rotating shaft drives the grinding wheel to perform grinding.

[0011] Preferably, a sliding shaft is arranged inside the turntable main shaft, a sliding groove is formed in an inner wall of the turntable main shaft, an annular slider is slidably connected to an inner wall of the sliding groove, and a return spring is fixedly connected between a bottom of the sliding shaft and a bottom of the sliding groove.

[0012] Through the above technical solution, a buffering effect is achieved. When the sliding shaft floats on the shaft body, it limits the top of the annular slider. When the shaft body floats, the top of the sliding shaft fits with the annular slider, thereby improving the stability of the shaft body when it floats.

[0013] Preferably, an electromagnetic turntable is provided on the top of the turntable support plate. A first hinge member is fixedly connected to the top of the turntable support plate. A second hinge member is hinged to the inner wall of the first hinge member. A telescopic cylinder is fixedly connected to the inner wall of the turntable support plate. A return spring is fixedly connected between the turntable support plate and the electromagnetic turntable.

[0014] Through the above technical solution, a function of controlling inclination is achieved. By controlling the telescopic cylinder to expand and contract, the parallelism of the electromagnetic turntable is changed, thereby realizing grinding effects at different angles. The electromagnetic turntable is energized to generate a magnetic field to attract the workpiece, achieving the effect of fixing the workpiece.

[0015] Preferably, an air flow port is provided inside the cavity shaft.

[0016] Through the above technical solution, an exhaust function is achieved. In a circular structure, spiral mixing occurs, and then it enters the inside of the shaft and is discharged through the air flow ports evenly distributed in the circumference.

[0017] Preferably, air pumps are evenly provided on the outer wall of the mixed-flow constant-pressure air delivery structure. An air inlet cavity is provided inside the mixed-flow constant-pressure air delivery structure. An inner cylinder is provided inside the mixed-flow constant-pressure air delivery structure, and the inner cylinder is communicated with the air inlet cavity.

[0018] Through the above technical solution, a pneumatic control function is achieved. Air pumps are connected to the air inlet cavities of the mixed-flow constant-pressure air delivery structure arranged tangentially at four positions. The four air pumps input four air flows into the inner cylinder. In a circular structure, spiral mixing occurs, and then it enters the inside of the shaft and is discharged through the air flow ports evenly distributed in the circumference, thereby achieving the purpose of mixing and equalizing multiple air flows and then outputting them evenly. It is easy to generate a stable air film to support the shaft body; the fully enclosed air film reduces most of the friction and provides more stable and accurate rotation accuracy.

[0019] Preferably, a grinding machine housing is fixedly connected to the top of the horizontal shaft circular table grinding machine. A protective door is slidably connected to the front of the grinding machine housing. An observation window is provided on the outer wall of the protective door. A handle is fixedly connected to the outer wall of the protective door.

[0020] Through the above technical solution, a protective function is achieved. By providing the protective door, when the workpiece is being processed, it prevents the generated debris from splashing and causing harm to the operator.

[0021] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is:

[0022] 1. The present invention provides a hydrostatic numerically controlled horizontal spindle rotary table surface grinder. By placing the workpiece on the electromagnetic turntable, the electromagnetic turntable is energized to generate a magnetic field to hold the workpiece, achieving the effect of fixing the workpiece. The hydrostatic liquid supply machine is started to supply hydrostatic oil into the interior of the hydrostatic spindle housing through the liquid supply pipe. The hydrostatic oil passes through the oil passages inside the hydrostatic inner bearing and the hydrostatic spindle clamping cylinder to the gap between the hydrostatic main spindle and the hydrostatic spindle clamping cylinder and the external oil passage, which plays the role of reducing friction, improving the machining accuracy, and prolonging the service life. At the same time, the seal realizes the sealing effect on the internal hydrostatic oil, preventing the leakage of the hydrostatic oil.

[0023] 2. The present invention provides a hydrostatic numerically controlled horizontal spindle rotary table surface grinder. The air inlet chambers of the mixed-flow constant-pressure air supply structure are all connected to air pumps. Four air pumps input four air flows into the inner cylinder. After spiral mixing under the circular structure, it enters the interior of the shaft and is discharged from the air flow ports evenly distributed in the circumference, so as to achieve the purpose of uniformly outputting after mixing and equalizing multiple air flows, which is easy to generate a stable air film, support the shaft body with a fully wrapped air film, reduce most of the friction, and provide more stable and accurate rotational accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure at the hydrostatic spindle of the present invention;

[0026] Figure 3 It is a schematic diagram of the turntable mechanism structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the turntable mechanism structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the hydrostatic mechanism structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the grinding mechanism structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure at the mixed-flow constant-pressure air supply structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure at the hydrostatic spindle clamping cylinder of the present invention;

[0032] Figure 9 It is a schematic diagram of the structure at the sliding shaft of the present invention;

[0033] Figure 10 It is a schematic diagram of the structure at the electromagnetic turntable of the present invention;

[0034] Figure 11 Schematic diagram of the internal structure of the mixed-flow constant-pressure gas transmission structure of the present invention.

[0035] In the figure: 1, horizontal-axis turntable grinding machine; 2, grinding mechanism; 3, turntable mechanism; 4, hydrostatic mechanism; 21, feed box; 22, hydrostatic shaft housing; 23, hydrostatic inner bearing; 24, hydrostatic shaft clamping cylinder; 25, hydrostatic main shaft; 26, outer bearing; 27, seal; 31, turntable main shaft; 32, turntable support plate; 33, turntable housing; 34, cavity shaft; 35, mixed-flow constant-pressure gas transmission structure; 36, gear; 37, threaded rod; 38, rotary cylinder; 41, fixed seat; 42, hydrostatic liquid feeder; 43, filter box; 44, hydrostatic liquid tank; 45, liquid supply pipe; 46, liquid return pipe; 47, connecting pipe; 48, liquid delivery pipe; 211, grinding wheel protective housing; 212, limiting member; 213, rotating shaft; 214, transmission belt; 215, grinding wheel; 216, grinding motor; 311, sliding shaft; 312, chute; 313, annular slider; 314, return spring; 321, electromagnetic turntable; 322, first hinge member; 323, second hinge member; 324, telescopic cylinder; 325, return spring; 341, air flow port; 351, air pump; 352, intake cavity; 353, inner cylinder; 5, grinding machine housing; 51, protective door; 52, observation window; 53, handle. Detailed implementation manners

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0037] Please refer to Figure 1-11 , the present invention provides a technical solution: a liquid hydrostatic numerically controlled horizontal-axis turntable surface grinding machine, including a horizontal-axis turntable grinding machine 1, a grinding mechanism 2, a turntable mechanism 3, and a hydrostatic mechanism 4. The grinding mechanism 2 is located inside the horizontal-axis turntable grinding machine 1, the turntable mechanism 3 is located inside the horizontal-axis turntable grinding machine 1, and the hydrostatic mechanism 4 is located on the top of the horizontal-axis turntable grinding machine 1.

[0038] The grinding mechanism 2 includes a feed box 21. Inside the feed box 21, there is a hydrostatic shaft housing 22. The inner wall of the hydrostatic shaft housing 22 is fixedly connected with a hydrostatic inner bearing 23. The inner wall of the hydrostatic inner bearing 23 is fixedly connected with a hydrostatic shaft clamping cylinder 24. An external oil passage is opened on the inner wall of the hydrostatic inner bearing 23. The inner wall of the hydrostatic shaft clamping cylinder 24 is provided with a hydrostatic main shaft 25. An outer bearing 26 is fixedly installed inside the hydrostatic inner bearing 23, and a seal 27 is fixedly installed on the inner wall of the hydrostatic inner bearing 23.

[0039] The turntable mechanism 3 includes a turntable main shaft 31. An outer wall of the turntable main shaft 31 is fixedly connected with a turntable support plate 32. A bottom of the turntable support plate 32 is rotatably connected with a turntable housing 33. An outer wall of the turntable main shaft 31 is fixedly connected with a cavity shaft 34. A bottom of the turntable housing 33 is fixedly connected with a mixed-flow constant-pressure gas transmission structure 35. The mixed-flow constant-pressure gas transmission structure 35 is rotatably connected with the cavity shaft 34. One end of the turntable main shaft 31 is fixedly connected with a gear 36. A threaded rod 37 is arranged on one side of the gear 36. Threads of the threaded rod 37 are movably connected with teeth of the gear 36. One end of the threaded rod 37 is provided with a rotary cylinder 38. An output shaft of the rotary cylinder 38 is fixedly connected with one end of the threaded rod 37.

[0040] The static pressure mechanism 4 includes a fixed seat 41. An outer wall of the fixed seat 41 is fixedly connected with a static pressure liquid feeder 42. A filter box 43 is arranged on a top of the horizontal spindle surface grinder 1. A static pressure liquid tank 44 is arranged on the top of the horizontal spindle surface grinder 1. A liquid supply pipe 45 is arranged between the static pressure liquid feeder 42 and the static pressure shaft housing 22. A liquid return pipe 46 is arranged between the filter box 43 and the static pressure shaft housing 22. A connecting pipe 47 is communicated between the filter box 43 and the static pressure liquid tank 44. A liquid delivery pipe 48 is communicated between the static pressure liquid tank 44 and the static pressure liquid feeder 42.

[0041] In this implementation scheme, the static pressure liquid feeder 42 supplies static pressure oil into the static pressure shaft housing 22 through the liquid supply pipe 45. The static pressure oil reaches the gap between the static pressure main shaft 25 and the static pressure shaft clamping cylinder 24 through the oil passages inside the static pressure inner bearing 23 and the static pressure shaft clamping cylinder 24, achieving the effect of reducing friction, improving the machining accuracy, and prolonging the service life at the same time.

[0042] Specifically, an outer wall of the feed box 21 is fixedly connected with a grinding wheel protective shell 211. The static pressure main shaft 25 penetrates through the feed box 21 and is rotatably connected with the grinding wheel protective shell 211. One end of the static pressure main shaft 25 is fixedly connected with a limiting member 212. An inner wall of the grinding wheel protective shell 211 is rotatably connected with a rotating shaft 213. A transmission belt 214 is connected between the rotating shaft 213 and the limiting member 212. An outer wall of the rotating shaft 213 is fixedly connected with a grinding wheel 215. An inner wall of the feed box 21 is fixedly connected with a grinding motor 216. An output shaft of the grinding motor 216 is fixedly connected with the static pressure main shaft 25.

[0043] In this embodiment, the output shaft of the grinding motor 216 drives the static pressure main shaft 25 to rotate, and a transmission belt 214 is connected between the rotating shaft 213 and the limiting member 212, so that the rotating shaft 213 drives the grinding wheel 215 to perform grinding.

[0044] Specifically, a sliding shaft 311 is arranged inside the rotary table main shaft 31. A chute 312 is formed on the inner wall of the rotary table main shaft 31. An annular slider 313 is slidably connected to the inner wall of the chute 312. A return spring 314 is fixedly connected between the bottom of the sliding shaft 311 and the bottom of the chute 312.

[0045] In this embodiment, when the shaft body floats, the sliding shaft 311 limits the top of the annular slider 313. When the shaft body floats, the top of the sliding shaft 311 fits with the annular slider 313, thereby improving the stability of the shaft body when the shaft body floats.

[0046] Specifically, an electromagnetic turntable 321 is arranged on the top of the turntable support plate 32. A first hinge member 322 is fixedly connected to the top of the turntable support plate 32. A second hinge member 323 is hinged to the inner wall of the first hinge member 322. A telescopic cylinder 324 is fixedly connected to the inner wall of the turntable support plate 32. A return spring 325 is fixedly connected between the turntable support plate 32 and the electromagnetic turntable 321.

[0047] In this embodiment, by controlling the telescopic cylinder 324 to expand and contract, the parallelism of the electromagnetic turntable 321 is changed, so as to achieve the grinding effect at different angles. The electromagnetic turntable 321 is energized to generate a magnetic field to attract the workpiece, achieving the effect of fixing the workpiece.

[0048] Specifically, an air flow port 341 is formed inside the cavity shaft 34.

[0049] In this embodiment, under the circular structure, spiral mixing occurs, and then it enters the inside of the shaft and is discharged from the uniformly distributed air flow ports 341 on the circumference.

[0050] Specifically, air pumps 351 are uniformly arranged on the outer wall of the mixed-flow constant-pressure air delivery structure 35. An air inlet cavity 352 is formed inside the mixed-flow constant-pressure air delivery structure 35. An inner cylinder 353 is formed inside the mixed-flow constant-pressure air delivery structure 35, and the inner cylinder 353 is communicated with the air inlet cavity 352.

[0051] In this embodiment, air pumps 351 are connected to the air inlet cavity 352 of the mixed-flow constant-pressure air delivery structure 35 in a tangential manner at four positions. The four air pumps 351 input four air flows into the inner cylinder 353. Under the circular structure, spiral mixing occurs, and then it enters the inside of the shaft and is discharged from the uniformly distributed air flow ports 341 on the circumference, so as to achieve the purpose of mixing and equalizing multiple air flows and then uniformly outputting them. It is easy to generate a stable air film to support the shaft body; the fully enclosed air film reduces most of the friction and provides more stable and precise rotation accuracy.

[0052] Specifically, a grinding machine housing 5 is fixedly connected to the top of the horizontal shaft circular table grinding machine 1. A protective door 51 is slidably connected to the front of the grinding machine housing 5. An observation window 52 is formed on the outer wall of the protective door 51. A handle 53 is fixedly connected to the outer wall of the protective door 51.

[0053] In this embodiment, by providing the protective door 51, during the machining of the workpiece, the generated debris can be prevented from splashing and causing harm to the operator.

[0054] Next, the working principle of this hydrostatic numerically controlled horizontal spindle rotary table surface grinder will be specifically described.

[0055] As Figure 1-11 shown, during the machining process, the workpiece is placed on the electromagnetic turntable 321. The electromagnetic turntable 321 is energized to generate a magnetic field to hold the workpiece, achieving the effect of fixing the workpiece. The hydrostatic liquid supply machine 42 is started to supply hydrostatic oil into the inside of the hydrostatic spindle housing 22 through the liquid supply pipe 45. The hydrostatic oil passes through the oil passages inside the hydrostatic inner bearing 23 and the hydrostatic spindle clamping cylinder 24 to the gap between the hydrostatic main spindle 25 and the hydrostatic spindle clamping cylinder 24 and the external oil passage, which plays the role of reducing friction, improving the machining accuracy, and prolonging the service life at the same time. The seal 27 seals the hydrostatic oil inside, preventing the leakage of the hydrostatic oil. The output shaft of the grinding motor 216 is started to drive the hydrostatic main spindle 25 to rotate. A transmission belt 214 is connected between the rotating shaft 213 and the limiting member 212, so that the rotating shaft 213 drives the grinding wheel 215 to perform grinding. The hydrostatic oil from the hydrostatic spindle housing 22 enters the inside of the filter tank 43 through the return pipe 46. The filtered hydrostatic oil then enters the hydrostatic liquid tank 44 through the connecting pipe 47 and then enters the inside of the hydrostatic spindle housing 22 again through the liquid supply pipe 48, realizing the function of recycling, cooling the hydrostatic oil at the same time, and prolonging its service life. Mixing and equalizing air supply, air pumps 351 are connected to the air inlet chambers 352 of the mixed-flow constant-pressure air supply structure 35 arranged tangentially in four. The four air pumps 351 input four air flows into the inner cylinder 353. Under the circular structure, spiral mixing occurs, and then it enters the inside of the shaft and is discharged from the air flow ports 341 evenly distributed in the circumference, so as to achieve the purpose of mixing and equalizing multiple air flows and then outputting them evenly, which is easy to generate a stable air film to support the shaft body; the fully enclosed air film reduces most of the friction and provides more stable and accurate rotational accuracy.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine, comprising a horizontal spindle rotary table grinding machine (1), a grinding mechanism (2), a rotary table mechanism (3) and a hydrostatic mechanism (4), characterized in that: The grinding mechanism (2) is located inside the horizontal spindle surface grinder (1), the turntable mechanism (3) is located inside the horizontal spindle surface grinder (1), and the hydrostatic pressure mechanism (4) is located on the top of the horizontal spindle surface grinder (1); The grinding mechanism (2) includes a feed box (21). Inside the feed box (21), there is a hydrostatic pressure shaft housing (22). The inner wall of the hydrostatic pressure shaft housing (22) is fixedly connected with a hydrostatic inner bearing (23). The inner wall of the hydrostatic inner bearing (23) is fixedly connected with a hydrostatic pressure shaft clamping cylinder (24). An external oil passage is opened on the inner wall of the hydrostatic inner bearing (23). A hydrostatic main shaft (25) is arranged on the inner wall of the hydrostatic pressure shaft clamping cylinder (24). An external bearing (26) is fixedly installed inside the hydrostatic inner bearing (23). A seal (27) is fixedly installed on the inner wall of the hydrostatic inner bearing (23); The turntable mechanism (3) includes a turntable main shaft (31). The outer wall of the turntable main shaft (31) is fixedly connected with a turntable support plate (32). The bottom of the turntable support plate (32) is rotatably connected with a turntable housing (33). The outer wall of the turntable main shaft (31) is fixedly connected with a cavity shaft (34). A mixed-flow constant-pressure gas transmission structure (35) is fixedly connected to the bottom of the turntable housing (33). The mixed-flow constant-pressure gas transmission structure (35) is rotatably connected with the cavity shaft (34). One end of the turntable main shaft (31) is fixedly connected with a gear (36). A threaded rod (37) is arranged on one side of the gear (36). The thread of the threaded rod (37) is movably connected with the teeth of the gear (36). One end of the threaded rod (37) is provided with a rotary cylinder (38). The output shaft of the rotary cylinder (38) is fixedly connected with one end of the threaded rod (37); The hydrostatic pressure mechanism (4) includes a fixed seat (41). The outer wall of the fixed seat (41) is fixedly connected with a hydrostatic pressure liquid feeder (42). A filter box (43) is arranged on the top of the horizontal spindle surface grinder (1). A hydrostatic pressure liquid tank (44) is arranged on the top of the horizontal spindle surface grinder (1). A liquid supply pipe (45) is arranged between the hydrostatic pressure liquid feeder (42) and the hydrostatic pressure shaft housing (22). A liquid return pipe (46) is arranged between the filter box (43) and the hydrostatic pressure shaft housing (22). A connecting pipe (47) is communicated between the filter box (43) and the hydrostatic pressure liquid tank (44). A liquid delivery pipe (48) is communicated between the hydrostatic pressure liquid tank (44) and the hydrostatic pressure liquid feeder (42).

2. The hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine according to claim 1, characterized in that: The outer wall of the feed box (21) is fixedly connected with a grinding wheel protective housing (211). The hydrostatic spindle (25) passes through the feed box (21) and is rotationally connected with the grinding wheel protective housing (211). One end of the hydrostatic spindle (25) is fixedly connected with a restricting member (212). The inner wall of the grinding wheel protective housing (211) is rotationally connected with a rotating shaft (213). A transmission belt (214) is connected between the rotating shaft (213) and the restricting member (212) for transmission. The outer wall of the rotating shaft (213) is fixedly connected with a grinding wheel (215). The inner wall of the feed box (21) is fixedly connected with a grinding motor (216). The output shaft of the grinding motor (216) is fixedly connected with the hydrostatic spindle (25).

3. A hydrostatic numerically controlled horizontal spindle rotary surface grinding machine according to claim 1, characterized in that: A sliding shaft (311) is arranged inside the rotary table spindle (31). A chute (312) is formed in the inner wall of the rotary table spindle (31). An annular slider (313) is slidably connected to the inner wall of the chute (312). A return spring (314) is fixedly connected between the bottom of the sliding shaft (311) and the bottom of the chute (312).

4. A hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine according to claim 1, characterized in that: An electromagnetic rotary table (321) is arranged on the top of the rotary table support plate (32). A first hinge member (322) is fixedly connected to the top of the rotary table support plate (32). A second hinge member (323) is hinged to the inner wall of the first hinge member (322). A telescopic cylinder (324) is fixedly connected to the inner wall of the rotary table support plate (32). A return spring (325) is fixedly connected between the rotary table support plate (32) and the electromagnetic rotary table (321).

5. A hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine according to claim 1, characterized in that: An air flow port (341) is formed inside the cavity shaft (34).

6. A hydrostatic numerically controlled horizontal spindle rotary table surface grinding machine according to claim 1, characterized in that: Air pumps (351) are uniformly arranged on the outer wall of the mixed-flow constant-pressure gas transmission structure (35). An air inlet cavity (352) is formed inside the mixed-flow constant-pressure gas transmission structure (35). An inner cylinder (353) is formed inside the mixed-flow constant-pressure gas transmission structure (35). The inner cylinder (353) is communicated with the air inlet cavity (352).

7. A hydrostatic numerically controlled horizontal spindle rotary surface grinding machine according to claim 1, characterized in that: A grinding machine housing (5) is fixedly connected to the top of the horizontal spindle surface grinder (1). A protective door (51) is slidably connected to the front of the grinding machine housing (5). An observation window (52) is formed in the outer wall of the protective door (51). A handle (53) is fixedly connected to the outer wall of the protective door (51).

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