Surface grinding device for large casting

Abstract

The invention discloses a surface grinding device for a large casting, which relates to the technical field of casting processing and comprises a grinding table, and the top of the grinding table is rotatably connected with a turntable. One end of a clamping plate is connected with a second hydraulic push rod, a casting can be clamped through the clamping plate, a clamping strip is in threaded connection with a lead screw, the height of the casting can be adjusted through the lead screw, and therefore switching of the clamping positions of the casting is achieved, and the outer wall of the casting can be ground through a first motor; a third grinding disc and a second grinding disc can grind the upper end face and the lower end face of the casting, so that dead corners left during casting grinding are reduced, the overall grinding effect is improved, the casting can be supported when placed through a placing plate, the casting can be limited through a clamping piece, the stability during casting grinding is improved, and a third motor can drive a second bevel gear to rotate; and rotation of the containing plate and the casting can be achieved through rotation of the second bevel gear and the first bevel gear, and different positions of the casting can make contact with the first grinding disc conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of casting processing, in particular to a surface grinding device for large castings. Background Art

[0002] Castings are metal shaped objects obtained by various casting methods, that is, the smelted liquid metal is poured into a pre-prepared mold by pouring, injection, suction or other casting methods, and then cooled and polished to obtain objects with a certain shape, size and performance.

[0003] For example, Chinese patent CN112757071B discloses a large-scale casting robot intelligent grinding device, including a forging placement table, a slide groove is provided on the top of the forging placement table, a slider is slidably connected inside the slide groove, a positioning protrusion is fixedly installed on the top of the slider, and the positioning protrusion is located on the top of the forging placement table, a hydraulic cylinder is fixedly installed on the outside of the slide groove, one end of the hydraulic cylinder is fixedly connected to the slider, an annular guide frame is installed on the outside of the forging placement table, two sets of movable frames are arranged on the top of the annular guide frame, and the movable frames are slidably connected to the top of the annular guide frame.

[0004] In the above patent, the problem of large errors in casting grinding is solved by the first robot and the second robot. However, after the casting is fixed, the bottom is blocked, and the two grinding structures can only grind the side walls and top of the casting. During the grinding process, the position of the clamping structure is fixed and difficult to replace. There are dead corners in the casting for grinding, and the grinding is not comprehensive, which reduces the overall grinding effect. Summary of the invention

[0005] The purpose of the present invention is to provide a surface grinding device for large castings to solve the problem proposed in the above-mentioned background technology that after the casting is fixed, the bottom is blocked, the two grinding structures can only grind the side walls and the top of the casting, the position of the clamping structure is fixed during the grinding process and is not easy to replace, there are dead corners in the casting, the grinding is not comprehensive, and the overall grinding effect is reduced.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a surface grinding device for large castings, comprising a grinding table, a turntable is rotatably connected to the top of the grinding table, a placing plate is rotatably connected to the top of the turntable, a grinding mechanism 1 and a grinding mechanism 2 are installed on the top of the grinding table, the grinding mechanism 2 comprises a motor 4, a clamping bar and a support plate, a fixed frame is fixedly connected to one side of the motor 4, a support plate is fixedly connected to one side of the fixed frame, a motor 6 is fixedly connected to the top of the support plate, a lead screw is fixedly connected to one end of the output shaft of the motor 6, the bottom of the lead screw is rotatably connected to the grinding table, the lead screw is connected to the clamping bar through a thread, and a clamping plate is slidably connected to one side of the clamping bar; A grinding disc two is rotatably connected to one side of the fixed frame, a reinforcement frame is fixedly connected to the bottom of the fixed frame, the bottom of the reinforcement frame is fixedly connected to the grinding table, a motor five is embedded in the reinforcement frame, one end of the output shaft of the motor five is fixedly connected to a spur gear one, one side of the spur gear one is meshed with a spur gear two, the top of the spur gear one is meshed with a rack, one side of the rack is fixedly connected to an auxiliary frame, and the top of the auxiliary frame is rotatably connected to a grinding disc three.

[0007] Preferably, a hydraulic push rod 2 is embedded inside the clamping strip, one end of the hydraulic push rod 2 is fixedly connected to an extension block, one side of the extension block is fixedly connected to the clamping plate, a motor 7 is fixedly connected to the bottom of the auxiliary frame, the motor 7 and one side of the auxiliary frame are slidably connected to the reinforcement frame, and one side of the reinforcement frame is rotationally connected to the flat gear 1 and the flat gear 2.

[0008] Preferably, the grinding mechanism comprises a guide frame, a motor and a hydraulic push rod, the bottom of the hydraulic push rod is fixedly connected to the grinding table, the top of the hydraulic push rod is fixedly connected to the guide frame, one side of the guide frame is slidably connected to a connecting frame, one side of the connecting frame is fixedly connected to the motor, one end of the output shaft of the motor is fixedly connected to a grinding disc, and the grinding disc is rotatably connected to the connecting frame.

[0009] Preferably, a locking piece is fixedly connected to one side of the placement plate, a bevel gear one is fixedly connected to the bottom of the placement plate, a bevel gear two is meshed with one side of the bevel gear one, an output shaft of a motor three is fixedly connected to one side of the bevel gear two, and the top of the motor three is fixedly connected to the turntable.

[0010] Preferably, the bottom of the turntable is connected to a reduction box, and the bottom of the reduction box is fixedly connected to the grinding table.

[0011] Preferably, one side of the reduction box is connected to motor 2 via a V-belt transmission, and the bottom of motor 2 is fixedly connected to the polishing table.

[0012] Preferably, a cooling assembly is installed on the top of the grinding table, and the cooling assembly includes a hydraulic cylinder, a support frame and a cooling pipe. The bottom of the hydraulic cylinder is fixedly connected to the grinding table, and the top of the hydraulic cylinder is fixedly connected to the support frame.

[0013] Preferably, the bottom of the support frame passes through the top of the polishing table, the support frame is slidably connected to the polishing table, and a cooling plate is fixedly connected to one side of the support frame.

[0014] Preferably, a fan is fixedly connected to one side of the cooling plate, one side of the fan is fixedly connected to the cooling plate, a cavity is provided inside the cooling plate, and a plurality of ventilation holes are provided on one side of the cooling plate.

[0015] Preferably, the top of the cooling plate is fixedly connected to the cooling pipe, and an exhaust hole is opened on the bottom side wall of the cooling pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, one end of the clamping plate is connected to the second hydraulic push rod, the clamping plate can be used to clamp the casting, the clamping bar and the lead screw are connected by a thread, the height of the casting can be adjusted by the lead screw, thereby realizing the switching of the clamping position of the casting, the outer wall of the casting can be polished by the first motor, and the upper and lower end surfaces of the casting can be polished by the third and second polishing discs, thereby reducing the dead angles remaining when the casting is polished and improving the overall polishing effect.

[0017] 2. In the present invention, one side of the engaging part is fixedly connected to the placement plate, and the placement plate can be used to support the casting when it is placed. The engaging part can limit the casting, reduce the displacement and shaking of the casting, and improve the stability of the casting during grinding. The motor three can drive the bevel gear two to rotate, and the rotation of the placement plate and the casting can be realized by the rotation of the bevel gear two and the bevel gear one, which is convenient for different positions of the casting to contact with the grinding disk one.

[0018] 3. In the present invention, the top of the hydraulic cylinder is connected to the support frame, and the hydraulic cylinder can be used to realize the lifting and lowering adjustment of the support frame, thereby changing the use height of the cooling plate, and the fan can be used to accelerate the air flow inside the cooling plate and the cooling pipe. The cooling plate and the cooling pipe can respectively assist in heat dissipation on the inner and outer sides of the casting, thereby shortening the cooling time of the casting and ensuring the cooling effect of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a surface grinding device for large castings according to the present invention; Figure 2 This is a schematic diagram of the cooling plate structure installation of a surface grinding device for large castings of the present invention; Figure 3 This is a schematic diagram of the structure installation of a grinding disc of a surface grinding device for large castings of the present invention; Figure 4 This is a schematic diagram of the installation structure of a second grinding disc of a surface grinding device for large castings according to the present invention; Figure 5 It is a schematic diagram of the meshing of a flat gear 2 and a rack structure of a surface grinding device for large castings of the present invention; Figure 6 It is a schematic diagram of the installation of the second structure of a hydraulic push rod of a surface grinding device for large castings of the present invention; Figure 7 The present invention is a schematic diagram of the installation structure of a bevel gear of a surface grinding device for large castings.

[0020] In the figure: 1. Grinding mechanism 1; 11. Guide frame; 12. Motor 1; 13. Hydraulic push rod 1; 14. Connecting frame; 15. Grinding disc 1; 2. Grinding table; 3. Turntable; 31. Placement plate; 32. Clamping piece; 33. Bevel gear 1; 34. Motor 2; 35. Speed ​​reducer; 36. Bevel gear 2; 37. Motor 3; 4. Cooling assembly; 41. Hydraulic cylinder; 42. Support frame; 43. Cooling plate; 44. Cooling pipe; 45. Fan; 5. Grinding mechanism 2; 51. Motor 4; 511. Fixed frame; 52. Reinforcement frame; 53. Motor 5; 54. Grinding disc 2; 55. Clamp; 56. Clamping bar; 561. Hydraulic push rod 2; 57. Motor 6; 58. Support plate; 581. Lead screw; 59. Rack; 591. Flat gear 1; 592. Flat gear 2; 593. Motor 7; 594. Auxiliary frame; 595. Grinding disc 3. DETAILED DESCRIPTION

[0021] 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 implementation regulations 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 creative work are within the scope of protection of the present invention.

[0022] Embodiment 1 Reference Figure 1-7As shown: a surface grinding device for large castings, including a grinding table 2, a turntable 3 is rotatably connected to the top of the grinding table 2, a placement plate 31 is rotatably connected to the top of the turntable 3, a grinding mechanism 1 and a grinding mechanism 2 5 are installed on the top of the grinding table 2, the grinding mechanism 2 5 includes a motor 4 51, a clamping bar 56 and a support plate 58, a fixed frame 511 is fixedly connected to one side of the motor 4 51, a support plate 58 is fixedly connected to one side of the fixed frame 511, a motor 6 57 is fixedly connected to the top of the support plate 58, a lead screw 581 is fixedly connected to one end of the output shaft of the motor 6 57, the bottom of the lead screw 581 is rotatably connected to the grinding table 2, the lead screw 581 is connected to the clamping bar 56 through a thread, and a clamping plate 55 is slidably connected to one side of the clamping bar 56; a grinding disc 2 54 is rotatably connected to one side of the fixed frame 511, and a fixed connection 58 is fixedly connected to the bottom of the fixed frame 511 A reinforcement frame 52 is connected, and the bottom of the reinforcement frame 52 is fixedly connected to the grinding table 2. A motor 53 is embedded in the reinforcement frame 52. One end of the output shaft of the motor 53 is fixedly connected to a flat gear 1 591, and one side of the flat gear 1 591 is meshed with a flat gear 2 592. The top of the flat gear 1 591 is meshed with a rack 59, and one side of the rack 59 is fixedly connected to an auxiliary frame 594, and the top of the auxiliary frame 594 is rotatably connected to a grinding disc 3 595; a hydraulic push rod 2 561 is embedded in the clamping bar 56, and one end of the hydraulic push rod 2 561 is fixedly connected to an extension block, and one side of the extension block is fixedly connected to the clamping plate 55; a motor 7 593 is fixedly connected to the bottom of the auxiliary frame 594, and one side of the motor 7 593 and the auxiliary frame 594 are slidably connected to the reinforcement frame 52, and one side of the reinforcement frame 52 is rotatably connected to the flat gear 1 591 and the flat gear 2 592.

[0023] The grinding mechanism 1 includes a guide frame 11, a motor 12 and a hydraulic push rod 13. The bottom of the hydraulic push rod 13 is fixedly connected to the grinding table 2, and the top of the hydraulic push rod 13 is fixedly connected to the guide frame 11. One side of the guide frame 11 is slidably connected to a connecting frame 14, and one side of the connecting frame 14 is fixedly connected to the motor 12. One end of the output shaft of the motor 12 is fixedly connected to a grinding disc 15, and the grinding disc 15 is rotatably connected to the connecting frame 14. In this embodiment, the use height of the guide frame 11 can be adjusted by using a hydraulic push rod 13, thereby changing the use height of the motor 12 and the grinding disc 15. The guide frame 11 can guide one end of the connecting frame 14, thereby adjusting the distance between the grinding disc 15 and the casting, so that one side of the grinding disc 15 is close to the casting. The connecting frame 14 can be used to support the installation and use of the motor 12, and the grinding disc 15 can be driven to rotate by the motor 12, thereby achieving grinding of the outer wall of the casting; The bottom of the motor 4 51 can be supported by the reinforcement frame 52, so as to improve the stability of the motor 4 51 installed and used on the top of the grinding table 2. The bottom of the motor 4 51 can be supported by the fixing frame 511. The fixing frame 511 can drive the grinding disc 2 54 to rotate on one side of the motor 4 51. The grinding disc 2 54 can be used to grind the top of the casting. A hydraulic push rod 2 561 is installed inside the clamping bar 56. The hydraulic push rod 2 561 drives the clamping plate 55 to move, and the distance between the two clamping plates 55 can be changed, so as to clamp or separate the casting. One side of the support plate 58 is fixedly connected to the fixing frame 511, and can support the installation and use of the screw 581. The rotation of the screw 581 can drive the clamping bar 56 to rise and fall, thereby changing the use height of the clamping plate 55, so that the bottom of the casting is separated from the placement plate 31, and the switching of the limit mode is realized. At the same time, motor five 53 can be used to drive the rotation of flat gear one 591, and through flat gear one 591 and flat gear two 592, the rack 59 can be driven to move horizontally. When the rack 59 moves, the auxiliary frame 594 can be driven to move to the side close to the casting, and the auxiliary frame 594 and the grinding disk three 595 can be moved to the bottom of the casting to adjust the position of the grinding disk three 595. The rotation of the grinding disk three 595 is used to complete the grinding process of the lower end of the casting, thereby reducing the grinding dead angle on the casting.

[0024] Embodiment 2 according to Figure 1 - Figure 7 As shown, a locking piece 32 is fixedly connected to one side of the placement plate 31, a bevel gear 1 33 is fixedly connected to the bottom of the placement plate 31, a bevel gear 2 36 is meshed with one side of the bevel gear 1 33, an output shaft of a motor 37 is fixedly connected to one side of the bevel gear 2 36, the top of the motor 37 is fixedly connected to the turntable 3, a reduction box 35 is transmission-connected to the bottom of the turntable 3, the bottom of the reduction box 35 is fixedly connected to the grinding table 2, one side of the reduction box 35 is connected to the motor 2 34 through a V-belt transmission, and the bottom of the motor 2 34 is fixedly connected to the grinding table 2.

[0025] In this embodiment, one side of the engaging member 32 is fixedly connected to the placement plate 31, which can increase the contact area between the placement plate 31 and the bottom of the casting, thereby achieving limited fixation of the bottom of the casting and ensuring the stability of the casting during grinding. The transmission between the motor 2 34 and the reduction box 35 can be achieved by using a V-belt, so that the motor 2 34 is used to drive the internal operation of the reduction box 35, and then the output end of the reduction box 35 drives the turntable 3 to rotate, thereby changing the position of the casting above the grinding table 2, and then entering different workstations for processing. The motor 37 can be used to drive the rotation of the bevel gear 2 36. Through the meshing of the bevel gear 2 36 and the bevel gear 1 33, the bevel gear 1 33 can be driven to rotate at the bottom of the turntable 3, thereby realizing the rotation of the placement plate 31 and the engaging member 32 at the top of the turntable 3, and driving the casting to rotate with the placement plate 31.

[0026] Embodiment 3 according to Figure 1 - Figure 7 As shown, a cooling assembly 4 is installed on the top of the grinding table 2, and the cooling assembly 4 includes a hydraulic cylinder 41, a support frame 42 and a cooling pipe 44. The bottom of the hydraulic cylinder 41 is fixedly connected to the grinding table 2, the top of the hydraulic cylinder 41 is fixedly connected to the support frame 42, the bottom of the support frame 42 passes through the top of the grinding table 2, and the support frame 42 and the grinding table 2 are slidingly connected. A cooling plate 43 is fixedly connected to one side of the support frame 42, a fan 45 is fixedly connected to one side of the cooling plate 43, one side of the fan 45 is fixedly connected to the cooling plate 43, and a cavity is opened inside the cooling plate 43, a plurality of ventilation holes are opened on one side of the cooling plate 43, the top of the cooling plate 43 is fixedly connected to the cooling pipe 44, and an exhaust hole is opened on the bottom side wall of the cooling pipe 44.

[0027] In this embodiment, the grinding table 2 can be used to support the bottom of the hydraulic cylinder 41, and the hydraulic cylinder 41 can drive the support frame 42 to rise and fall on the top of the grinding table 2, thereby changing the use height of the cooling plate 43, so that the ventilation holes on one side of the cooling plate 43 are aligned with the casting, and the L-shaped cooling pipe 44 is inserted into the casting. The cooling plate 43 and the cooling pipe 44 can accelerate the air flow around the casting, increase the speed of heat conduction on the surface of the casting, thereby assisting in cooling the casting, allowing the casting to cool quickly and avoiding excessive surface temperature when the casting is unloaded.

[0028] The method of use and working principle of the device are as follows: first, the casting to be polished is placed on the placement plate 31, at which time the engaging member 32 engages with the bottom side wall of the casting, and the motor 34 drives the V-belt transmission and then drives the reduction box 35 to operate, and the reduction box 35 drives the turntable 3 to rotate, so as to change the position of the casting and move the casting to the next station. When the casting moves to the side of the polishing mechanism 1, the hydraulic push rod 13 drives the guide frame 11 and the connecting frame 14 to rise and fall, and the connecting frame 14 moves along the guide frame 11. Move one side to adjust the position of the grinding disc 15, so that the grinding disc 15 contacts the side wall of the casting, and use the motor 12 to drive the grinding disc 15 to rotate, so as to achieve the grinding of the outer ring surface of the casting. During the grinding process, the motor 37 is used to drive the bevel gear 2 36 to rotate, and the bevel gear 2 36 is meshed with the bevel gear 1 33 to drive the bevel gear 1 33 to rotate, thereby driving the placement plate 31 and the casting on the top of the turntable 3 to rotate, changing the contact position between the casting and the grinding disc 15, and completing the overall grinding of the outer wall of the casting; After the preliminary grinding is completed, the turntable 3 continues to rotate to move the casting to the next station. At this time, the casting is located on one side of the grinding mechanism 2 5. The hydraulic push rod 2 561 is used to push the clamping plate 55 to move, so that the two clamping plates 55 clamp the casting. After clamping, the support plate 58 drives the lead screw 581 to rotate, and the clamping bar 56 moves up along the lead screw 581 to separate the bottom of the casting from the placement plate 31 until the top of the casting overlaps with the bottom of the grinding mechanism 2 5, and then the motor 53 is used to drive the flat gear 1 591 to rotate, and the flat gear 1 591 is used to drive the flat gear 2 592 to rotate, and the engagement of the flat gear 2 592 with the rack 59 is used to drive the rack 59 to approach One side of the casting is moved, and the auxiliary frame 594 and the grinding disc three 595 are moved to the bottom of the casting. At this time, the motor seven 593 drives the grinding disc three 595 to rotate on the top of the auxiliary frame 594, and the auxiliary frame 594 is used to grind the bottom end face of the casting. The motor four 51 drives the grinding disc two 54 on one side to rotate, and the grinding disc two 54 is used to grind the top end face of the casting. After the grinding of the bottom of the casting is completed, the height of the grinding disc three 595 is kept unchanged, and the clamping plate 55 is separated from the side wall of the casting. The position of the casting can be changed on the top of the grinding disc three 595, so that the grinding disc two 54 contacts different positions of the top of the casting, and the grinding process of the upper and lower ends of the casting is completed; After the secondary grinding is completed, the clamping plate 55 clamps the casting, the rack 59 drives the auxiliary frame 594 to move in the opposite direction, and the clamping bar 56 moves down along the screw 581 to clamp the casting on the top of the placement plate 31 and the clamping member 32. After the clamping plate 55 is separated from the casting, it moves up and resets, and the turntable 3 continues to rotate to move the casting to one side of the cooling component 4. The hydraulic cylinder 41 is used to drive the cooling plate 43 and the cooling pipe 44 to move downward, and the end of the cooling pipe 44 is inserted into the casting. The fan 45 can send air into the cavity of the cooling plate 43, and the cold air can be discharged from the ventilation holes on one side of the cooling plate 43 and the cooling pipe 44. The air discharged from the cooling plate 43 can cool the outside of the casting, and the cooling pipe 44 can accelerate the heat exchange inside the casting, thereby improving the cooling effect of the casting. After cooling, the turntable 3 rotates again to move the casting to the initial position, and the treated casting can be taken out at this time.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A surface grinding device for large castings, comprising a grinding table (2), the top of which is rotatably connected to a turntable (3), characterized in that: The top of the turntable (3) is rotatably connected to a placement plate (31); the top of the grinding table (2) is equipped with a grinding mechanism 1 (1) and a grinding mechanism 2 (5); the grinding mechanism 2 (5) comprises a motor 4 (51), a clamping bar (56) and a support plate (58); one side of the motor 4 (51) is fixedly connected to a fixing frame (511); one side of the fixing frame (511) is fixedly connected to a support plate (58); the top of the support plate (58) is fixedly connected to a motor 6 (57); one end of the output shaft of the motor 6 (57) is fixedly connected to a lead screw (581); the bottom of the lead screw (581) is rotatably connected to the grinding table (2); the lead screw (581) is connected to the clamping bar (56) via a thread; one side of the clamping bar (56) is slidably connected to a clamping plate (55); A grinding disc 2 (54) is rotatably connected to one side of the fixed frame (511), a reinforcement frame (52) is fixedly connected to the bottom of the fixed frame (511), the bottom of the reinforcement frame (52) is fixedly connected to the grinding table (2), a motor 5 (53) is embedded in the reinforcement frame (52), a spur gear 1 (591) is fixedly connected to one end of the output shaft of the motor 5 (53), a spur gear 2 (592) is meshed on one side of the spur gear 1 (591), a rack (59) is meshed on the top of the spur gear 1 (591), an auxiliary frame (594) is fixedly connected to one side of the rack (59), and a grinding disc 3 (595) is rotatably connected to the top of the auxiliary frame (594).

2. The surface grinding device for large castings according to claim 1, characterized in that: A hydraulic push rod 2 (561) is embedded inside the clamping strip (56), one end of the hydraulic push rod 2 (561) is fixedly connected to an extension block, one side of the extension block is fixedly connected to the clamping plate (55), a motor 7 (593) is fixedly connected to the bottom of the auxiliary frame (594), one side of the motor 7 (593) and the auxiliary frame (594) are slidably connected to the reinforcement frame (52), and one side of the reinforcement frame (52) is rotationally connected to the flat gear 1 (591) and the flat gear 2 (592).

3. The surface grinding device for large castings according to claim 1, characterized in that: The grinding mechanism (1) comprises a guide frame (11), a motor (12) and a hydraulic push rod (13); the bottom of the hydraulic push rod (13) is fixedly connected to the grinding table (2); the top of the hydraulic push rod (13) is fixedly connected to the guide frame (11); one side of the guide frame (11) is slidably connected to a connecting frame (14); one side of the connecting frame (14) is fixedly connected to the motor (12); one end of the output shaft of the motor (12) is fixedly connected to a grinding disc (15); and the grinding disc (15) is rotatably connected to the connecting frame (14).

4. The surface grinding device for large castings according to claim 1, characterized in that: A locking member (32) is fixedly connected to one side of the placement plate (31), a bevel gear 1 (33) is fixedly connected to the bottom of the placement plate (31), a bevel gear 2 (36) is meshed with one side of the bevel gear 1 (33), an output shaft of a motor 3 (37) is fixedly connected to one side of the bevel gear 2 (36), and a top of the motor 3 (37) is fixedly connected to the turntable (3).

5. The surface grinding device for large castings according to claim 1, characterized in that: The bottom of the turntable (3) is transmission-connected to a reduction box (35), and the bottom of the reduction box (35) is fixedly connected to the grinding table (2).

6. The surface grinding device for large castings according to claim 5, characterized in that: One side of the reduction box (35) is connected to the second motor (34) via a V-belt transmission, and the bottom of the second motor (34) is fixedly connected to the grinding table (2).

7. The surface grinding device for large castings according to claim 1, characterized in that: A cooling assembly (4) is installed on the top of the grinding table (2), and the cooling assembly (4) comprises a hydraulic cylinder (41), a support frame (42) and a cooling pipe (44), the bottom of the hydraulic cylinder (41) is fixedly connected to the grinding table (2), and the top of the hydraulic cylinder (41) is fixedly connected to the support frame (42).

8. The surface grinding device for large castings according to claim 7, characterized in that: The bottom of the support frame (42) passes through the top of the grinding table (2), the support frame (42) and the grinding table (2) are slidably connected, and a cooling plate (43) is fixedly connected to one side of the support frame (42).

9. The surface grinding device for large castings according to claim 8, characterized in that: A fan (45) is fixedly connected to one side of the cooling plate (43), one side of the fan (45) is fixedly connected to the cooling plate (43), a cavity is provided inside the cooling plate (43), and a plurality of ventilation holes are provided on one side of the cooling plate (43).

10. The surface grinding device for large castings according to claim 9, characterized in that: The top of the cooling plate (43) is fixedly connected to the cooling pipe (44), and an exhaust hole is provided on the bottom side wall of the cooling pipe (44).

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