Novel pneumatic expansion core setting device capable of achieving rapid and firm clamping

Abstract

The utility model relates to the technical field of casting, in particular to a novel pneumatic expansion core setting device capable of realizing quick and firm clamping, which comprises a lifting ring, a connecting block fixedly connected to the bottom of the lifting ring, a plurality of leveling components arranged around the connecting block at intervals, the upper ends of the leveling components are mounted on the connecting block, and the lower ends of the leveling components are arranged at the top of a mounting plate. A first motor is arranged in the middle of the mounting plate, a motor shaft of the first motor is connected with a gear set, driving parts are arranged at the bottoms of the left end and the right end of the mounting plate respectively, the inner ends of the two driving parts are connected with the gear set respectively, and the two pneumatic expansion parts are movably connected with the corresponding driving parts respectively. And in a working state, the lower ends of the two pneumatic expansion pieces respectively extend into matched grooves at the top of the sand core. The sand core setting device has the advantages that the sand core is firmly clamped through the friction effect of the silica gel expansion sleeve, and efficient and rapid core setting is achieved; adjustment of the clamping position and leveling of the mounting plate are automatically completed, the working efficiency of the device is improved, and the stability of the device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a novel pneumatic expansion core setting device which can realize fast and firm clamping. Background Art

[0002] As an important part of casting production, sand core is mainly used to form the cavity inside the casting. As the weight and volume of castings continue to increase, it is often necessary to make special core clamps and core devices.

[0003] For example, in the patent document with patent publication number CN219484134U, a clamping device for casting sand cores is disclosed, which includes a frame, a lifting ring, and two sand core clamps. The frame is triangular in shape, the top is connected to the lifting ring, and the bottom is provided with a pulley guide rail and a screw. The pulley guide rail is connected to the screw, and the tops of the two sand core clamps are installed on the wheel guide rail and the screw; two sections of threads with opposite spiral directions are engraved on the screw, and threads with opposite spiral directions are engraved inside the two sand core clamps; a rotating wheel and a rotatable clamping plate are provided at the end of the screw, and the clamping plate has a square clamping groove for the screw to be embedded.

[0004] According to the existing technical literature, the clamping device realizes the clamping of the sand core by rotating the end wheel of the screw so that the two sand core grippers move toward or away from each other in their respective threaded sections. However, due to the complex shape of the sand core, it is difficult to set a slot on its outer surface for the sand core grippers to clamp, and the outer surface of the sand core circumference is often a molding surface, and setting a slot on it may cause appearance defects of the casting; secondly, the manual rotation of the screw is time-consuming and labor-intensive, and the adjustment efficiency is low; at the same time, the device lacks a leveling structure, and it is difficult to ensure that the two sand core grippers are always at the same height during actual use.

[0005] To this end, the utility model optimizes and improves the clamping position, the adjustment method of the clamping tool and the leveling problem of the device in the prior art, and hereby proposes a new core lowering device that can flexibly clamp the core head and quickly achieve leveling, so as to better solve the problems in the prior art. Utility Model Content

[0006] The utility model is to solve one of the above-mentioned technical problems, and the technical scheme adopted is: a new type of pneumatic expansion core lowering device that can realize fast and firm clamping, including a lifting ring, a connecting block is fixedly connected to the bottom of the lifting ring, and a plurality of leveling components are arranged around the connecting block at intervals, the upper end of each leveling component is installed on the connecting block, and the lower end of each leveling component is fixedly arranged at a corresponding position on the top of a mounting plate, a first motor is fixedly arranged in the middle of the mounting plate, the motor shaft of the first motor is vertically arranged downward and connected to a gear set, driving members are respectively provided at the bottom of the left and right ends of the mounting plate, the inner ends of the two driving members are respectively connected to the corresponding positions of the gear set, and also include two pneumatic expansion members, the upper ends of the two pneumatic expansion members are respectively connected to the driving members at the corresponding positions, and the lower ends of the two pneumatic expansion members are respectively extended into the matching grooves on the top of the sand core in the working state.

[0007] In any of the above schemes, it is preferred that the gear set includes a first bevel gear, which is coaxially fixed on the motor shaft of the first motor, and second bevel gears are meshed and connected on the left and right sides of the first bevel gear, respectively, and the two second bevel gears are respectively connected to the inner ends of the driving member at corresponding positions.

[0008] In any of the above schemes, it is preferred that the driving member includes a screw and two fixed blocks, the two fixed blocks are fixedly connected to the bottom of the mounting plate at an interval, the two ends of the screw are movably inserted in the rotating holes of the two fixed blocks respectively, the inner end of the screw passes through the fixed blocks at the corresponding positions and is coaxially fixedly connected to the second bevel gear on the same side, a threaded hole is opened in the upper part of the pneumatic expansion member, and the threaded section of the screw is movably connected to the threaded hole.

[0009] In any of the above schemes, preferably, the pneumatic expansion member includes a moving block, the threaded hole is horizontally penetrated in the middle of the moving block, a first connecting sleeve is fixedly connected to the bottom of the moving block, a cylinder is fixedly connected to the inner cavity of the first connecting sleeve, a first through hole is opened at a corresponding position on the bottom surface of the first connecting sleeve, the end of the telescopic rod on the lower side of the cylinder passes through the first through hole, a second connecting sleeve is fixedly connected to the bottom of the first connecting sleeve, the telescopic rod of the cylinder passes through the inner cavity of the second connecting sleeve, a silicone expansion sleeve is fixedly connected to the bottom of the second connecting sleeve, a mounting hole is provided at a corresponding position on the top of the silicone expansion sleeve, and the end of the telescopic rod of the cylinder is fixedly connected to the inside of the mounting hole;

[0010] In the working state, the two silicone expansion sleeves extend into the matching grooves on the top of the sand core respectively.

[0011] In any of the above schemes, preferably, the leveling assembly includes a connecting seat and a second motor, the connecting seat and the second motor are fixedly connected at an interval at the top of the mounting plate, support plates are fixedly connected to the two ends of the top of the connecting seat respectively, and also includes a rotating shaft, the two ends of the rotating shaft respectively move through the rotating holes of the two support plates, one end of the rotating shaft is coaxially fixedly connected to the motor shaft of the second motor, a cable is wound around the rotating shaft, and the upper end of the cable is fixedly mounted on the connecting block.

[0012] In any of the above schemes, it is preferred that a first plug hole is opened on the end portion of the rotating shaft away from the second motor, and a second plug hole is opened at a corresponding position on the top of the mounting plate, and also includes a locking rod, and in the working state, the locking rod is inserted into the first plug hole and the second plug hole in sequence.

[0013] In any of the above schemes, preferably, slide rails are fixedly connected to the bottom of the left and right ends of the mounting plate respectively, and a slide groove is opened on the top of the moving block, and the two slide rails are slidably connected with the slide grooves at corresponding positions respectively.

[0014] In any of the above schemes, preferably, an air regulating valve is fixedly connected to the top of the mounting plate, and the air regulating valve is connected to the cylinder at the corresponding position through two PU air pipes.

[0015] In any of the above schemes, preferably, a second through hole is opened in the middle of the mounting plate, a protective cover is fixedly connected to the middle of the top surface of the mounting plate, the first motor is fixedly connected to the protective cover, and the motor shaft of the first motor passes through the second through hole and is coaxially fixedly connected to the first bevel gear.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The utility model arranges a silicone expansion sleeve at the end of the cylinder, and inserts the silicone expansion sleeve into the corresponding groove of the sand core. Under the cooperation of the first connecting sleeve and the second connecting sleeve, the cylinder retracts to cause the silicone expansion sleeve to deform and expand, so that it presses against the inner wall of the groove. In this way, the sand core can be firmly clamped under the action of friction, thereby realizing efficient and fast core lowering operation.

[0018] 2. The utility model sets the groove for clamping at the core head position. Since damage to the surface of the core head will not cause defects to the casting, the quality of the casting can be guaranteed.

[0019] 3. The utility model drives the first bevel gear to rotate through the first motor. Under the meshing connection between the first bevel gear and the second bevel gear, the screw can be further rotated accordingly, so that the moving block movably connected to the screw thread segment can be horizontally displaced, thereby completing the adjustment of the clamping position. This can avoid manual adjustment, save time and effort, and greatly improve the efficiency of adjustment.

[0020] 4. The utility model drives the rotating shaft to rotate through the second motor, which can realize the automatic retraction and release of the cable, thereby automatically leveling the height position of the mounting plate. At the same time, through the matching connection between the locking rod and the first plug hole and the second plug hole, the rotation of the rotating shaft can be limited and locked to ensure the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the specific implementation of the utility model, the following will briefly introduce the drawings required for the specific implementation. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a front view structural schematic diagram of the core lowering device of the utility model.

[0023] Figure 2 It is a schematic diagram of the top view of the core setting device of the utility model.

[0024] Figure 3 It is a cross-sectional view of the pneumatic expansion member of the utility model.

[0025] Figure 4 It is a schematic diagram of the top view of the leveling assembly of the utility model.

[0026] Figure 5 for Figure 1 A partial enlarged view of point A in the middle.

[0027] Figure 6 for Figure 1 A partial enlarged view of point B in the middle.

[0028] In the figure, 1, lifting ring; 2, connecting block; 3, mounting plate; 4, first motor; 5, sand core; 6, groove; 7, first bevel gear; 8, second bevel gear; 9, screw; 10, fixing block; 11, threaded hole; 12, moving block; 13, first connecting sleeve; 14, second connecting sleeve; 15, silicone expansion sleeve; 16, cylinder; 17, first through hole; 18, mounting hole; 19, connecting seat; 20, supporting plate; 21, rotating shaft; 22, second motor; 23, first plug hole; 24, second plug hole; 25, locking rod; 26, cable; 27, slide rail; 28, slide groove; 29, air regulating valve; 30, PU air pipe; 31, second through hole; 32, protective cover. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. The specific structure of the utility model is as follows Figure 1-Figure 6 as shown in .

[0030] A new type of pneumatic expansion core device that can achieve fast and firm clamping, includes a lifting ring 1, a connecting block 2 is fixedly connected to the bottom of the lifting ring 1, and a plurality of leveling components are arranged around the connecting block 2 at intervals, the upper end of each leveling component is mounted on the connecting block 2, and the lower end of each leveling component is fixedly arranged at a corresponding position on the top of a mounting plate 3, and a first motor 4 is fixedly arranged in the middle of the mounting plate 3, and the motor shaft of the first motor 4 is vertically arranged downward and connected to a gear set, and driving members are respectively provided at the bottom of the left and right ends of the mounting plate 3, and the inner ends of the two driving members are respectively connected to the corresponding positions of the gear set, and also include two pneumatic expansion members, the upper ends of the two pneumatic expansion members are respectively connected to the driving members at the corresponding positions, and the lower ends of the two pneumatic expansion members are respectively extended into the matching grooves 6 at the top of the sand core 5 in the working state.

[0031] The utility model comprises a lifting ring 1, a connecting block 2 is welded below the lifting ring 1, a mounting plate 3 is arranged in parallel below the connecting block 2, four leveling components are evenly spaced between the connecting block 2 and the mounting plate 3, the upper end of each leveling component is fixedly mounted on the bottom of the connecting block 2, and the lower end of each leveling component is fixedly mounted on the top surface at the end position of the mounting plate 3. Under the joint action of the four leveling components, the height position of each end of the mounting plate 3 can be adjusted accordingly, so that the mounting plate 3 remains horizontal.

[0032] A first motor 4 is fixedly installed in the middle of the mounting plate 3. The first motor 4 drives the gear set to operate, and then the gear set drives the two driving parts to perform corresponding movements. Under the action of the coordinated connection between the driving part and the pneumatic expansion member, the two pneumatic expansion members can eventually move toward or away from each other in the horizontal direction. A sand core 5 is arranged below the two. Since damage to the core head surface will not affect the appearance of the casting, the utility model arranges a groove 6 at an appropriate position on the core head surface according to the shape and size of the sand core 5. In this way, when the two pneumatic expansion members move to the corresponding positions, the lower ends of the two extend into the groove 6 respectively, thereby clamping and fixing the sand core 5.

[0033] The lifting ring 1 is connected to an external hoist, and the sand core 5 is lifted by the hoist to complete the core setting work.

[0034] In any of the above schemes, it is preferred that the gear set includes a first bevel gear 7, which is coaxially fixedly sleeved on the motor shaft of the first motor 4, and second bevel gears 8 are meshed and connected on the left and right sides of the first bevel gear 7, and the two second bevel gears 8 are respectively connected to the inner ends of the driving member at corresponding positions.

[0035] The motor shaft of the first motor 4 rotates, driving the first bevel gear 7 keyed to the motor shaft to rotate synchronously. Under the meshing connection between the first bevel gear 7 and the second bevel gear 8, the second bevel gear 8 rotates to drive the corresponding driving member to move.

[0036] In any of the above schemes, it is preferred that the driving member includes a screw 9 and two fixed blocks 10, the two fixed blocks 10 are fixedly connected to the bottom of the mounting plate 3 at intervals, the two ends of the screw 9 are movably inserted in the rotating holes of the two fixed blocks 10, the inner end of the screw 9 passes through the fixed blocks 10 at the corresponding positions and is coaxially fixedly connected to the second bevel gear 8 on the same side, and a threaded hole 11 is opened in the upper part of the pneumatic expansion member, and the threaded section of the screw 9 is movably connected with the threaded hole 11.

[0037] Two fixing blocks 10 are welded to the bottom of the mounting plate 3, a screw rod 9 is movably installed between the two fixing blocks 10, the second bevel gear 8 is coaxially fixed to the inner end of the screw rod 9 by a key connection, an external thread is provided in the middle of the screw rod 9, and a threaded hole 11 for matching with the threaded section of the screw rod 9 is opened in the upper part of the pneumatic expansion piece.

[0038] When the second bevel gear 8 rotates to drive the screw rod 9 to rotate, the pneumatic expansion member moves horizontally along the screw rod 9 under the active cooperation connection between the threaded section of the screw rod 9 and the threaded hole 11 .

[0039] In any of the above schemes, it is preferred that the pneumatic expansion member includes a moving block 12, the threaded hole 11 is horizontally penetrated in the middle of the moving block 12, a first connecting sleeve 13 is fixedly connected to the bottom of the moving block 12, a cylinder 16 is fixedly connected to the inner cavity of the first connecting sleeve 13, a first through hole 17 is opened at a corresponding position on the bottom surface of the first connecting sleeve 13, the end of the telescopic rod on the lower side of the cylinder 16 passes through the first through hole 17, a second connecting sleeve 14 is fixedly connected to the bottom of the first connecting sleeve 13, the telescopic rod of the cylinder 16 passes through the inner cavity of the second connecting sleeve 14, a silicone expansion sleeve 15 is fixedly connected to the bottom of the second connecting sleeve 14, a mounting hole 18 is provided at a corresponding position on the top of the silicone expansion sleeve 15, and the end of the telescopic rod of the cylinder 16 is fixedly connected to the inside of the mounting hole 18;

[0040] In the working state, the two silicone expansion sleeves 15 extend into the matching grooves 6 at the top of the sand core 5 respectively.

[0041] A threaded hole for threaded cooperation with the screw rod 9 is provided through the moving block 12. The screw rod 9 rotates to realize horizontal displacement of the moving block 12, and further drives the connection structure below the moving block 12 to move horizontally.

[0042] Below the moving block 12, the first connecting sleeve 13, the second connecting sleeve 14 and the silicone expansion sleeve 15 are fixedly installed from top to bottom. The first connecting sleeve 13 and the second connecting sleeve 14 are both hollow inside, and the inner cavities of the two are connected through the first through hole 17 on the bottom surface of the first connecting sleeve 13. A mounting hole 18 is provided at the corresponding position on the top of the silicone expansion sleeve 15, and the mounting hole 18 is connected with the inside of the second connecting sleeve 14. The cylinder 16 is fixedly installed in the inner cavity of the first connecting sleeve 13, and its telescopic rod passes through the first through hole 17 downward, and penetrates the inner cavity of the second connecting sleeve 14, and finally extends into the mounting hole 18. At the same time, the outer surface of the end of the telescopic rod is fixedly connected to the inner wall of the mounting hole 18. When the telescopic rod of the cylinder 16 retracts, its end drives the silicone expansion sleeve 15 to deform and squeeze, thereby expanding it, so that the outer surface of the silicone expansion sleeve 15 presses against the inner wall of the corresponding groove 6 of the sand core 5, and the sand core 5 is fixed under the friction between the two.

[0043] In any of the above schemes, it is preferred that the leveling assembly includes a connecting seat 19 and a second motor 22, and the connecting seat 19 and the second motor 22 are fixedly connected to the top of the mounting plate 3 at intervals, and support plates 20 are respectively fixedly connected to the two ends of the top of the connecting seat 19, and also includes a rotating shaft 21, and the two ends of the rotating shaft 21 are respectively movable through the rotating holes of the two support plates 20, one end of the rotating shaft 21 is coaxially fixedly connected to the motor shaft of the second motor 22, and a cable 26 is wound around the rotating shaft 21, and the upper end of the cable 26 is fixedly mounted on the connecting block 2.

[0044] The second motor 22 is in operation, driving the rotating shaft 21 to rotate with the cooperation of the support plate 20. One end of the cable 26 is fixedly connected to the rotating shaft 21, and the other end thereof is fixedly connected to the connecting block 2. As the rotating shaft 21 rotates, the cable 26 is continuously wound around the rotating shaft 21, thereby realizing the adjustment of the height position of the end of the mounting plate 3.

[0045] In any of the above schemes, it is preferred that a first plug hole 23 is provided on the end portion of the rotating shaft 21 away from the second motor 22, and a second plug hole 24 is provided at a corresponding position on the top of the mounting plate 3, and also includes a locking rod 25. In the working state, the locking rod 25 is inserted into the first plug hole 23 and the second plug hole 24 in sequence.

[0046] The second motor 22 itself has a self-locking function, but in order to reduce the motor load and further ensure the stability of the leveling assembly in the locked state, a first plug hole 23 and a second plug hole 24 are respectively opened on the rotating shaft 21 and the mounting plate 3, and the rotation of the rotating shaft 21 is further locked by inserting the locking rod 25 into the first plug hole 23 and the second plug hole 24 in turn, ensuring that the cable 26 will not be retracted or released in the working state.

[0047] In any of the above schemes, preferably, slide rails 27 are fixedly connected to the bottom of the left and right ends of the mounting plate 3, and a slide groove 28 is opened on the top of the moving block 12, and the two slide rails 27 are slidably connected with the slide grooves 28 at corresponding positions.

[0048] The cooperation and connection between the slide rail 27 and the slide groove 28 can ensure that the moving block 12 can achieve better horizontal displacement.

[0049] In any of the above solutions, preferably, an air regulating valve 29 is fixedly connected to the top of the mounting plate 3, and the air regulating valve 29 is connected to the cylinder 16 at the corresponding position through two PU air pipes 30 respectively.

[0050] The high-pressure gas is connected to the air inlet of the air regulating valve 29, and then the high-pressure gas is further introduced into the corresponding cylinder 16 through the two PU air pipes 30, and the up and down movement of the cylinder 16 is controlled by adjusting the air regulating valve 29.

[0051] In any of the above schemes, preferably, a second through hole 31 is opened in the middle position of the mounting plate 3, a protective cover 32 is fixedly connected to the middle of the top surface of the mounting plate 3, the first motor 4 is fixedly connected to the protective cover 32, and the motor shaft of the first motor 4 passes through the second through hole 31 and is coaxially fixedly connected to the first bevel gear 7.

[0052] The first motor 4 is fixedly arranged above the mounting plate 3 through the protective cover 32 , and the motor shaft passes through the second through hole 31 and extends to the bottom of the mounting plate 3 , and is then coaxially fixedly connected to the first bevel gear 7 .

[0053] Specific working principle:

[0054] The operator first turns on the second motor 22 to rotate the shafts 21, so that the cables 26 wound on the shafts 21 are retracted and released accordingly, thereby adjusting the height positions of the ends of the mounting plate 3, thereby achieving the leveling operation of the mounting plate 3. After the mounting plate 3 is adjusted to the horizontal, the locking rod 25 is sequentially inserted into the first plug hole 23 and the second plug hole 24, thereby further limiting and locking the rotation of the shaft 21.

[0055] After the leveling operation is completed, the operator turns on the first motor 4. Under the meshing transmission of the first bevel gear 7 and the second bevel gear 8, the two screws 9 movably installed below the left and right ends of the mounting plate 3 respectively perform corresponding rotational movements, thereby driving the two moving blocks 12 to move, and further driving the two silicone expansion sleeves 15 to move horizontally. When the silicone expansion sleeves 15 move to the top of the groove 6 of the sand core 5, the two silicone expansion sleeves 15 are respectively inserted into the corresponding grooves 6, and then the cylinder 16 is turned on. Under the action of the retraction of the end of the telescopic rod of the cylinder 16, the silicone expansion sleeve 15 is deformed and expanded, thereby pressing against the inner wall of the groove 6, and the sand core 5 is fixed under the action of friction.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

[0057] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A new type of pneumatic expansion core setting device that can achieve fast and firm clamping, characterized in that: The invention comprises a lifting ring (1), the bottom of which is fixedly connected to a connecting block (2), a plurality of leveling components are arranged at intervals around the connecting block (2), the upper end of each leveling component is mounted on the connecting block (2), the lower end of each leveling component is fixedly arranged at a corresponding position on the top of a mounting plate (3), a first motor (4) is fixedly arranged in the middle of the mounting plate (3), the motor shaft of the first motor (4) is arranged vertically downward and is connected to a gear set, driving members are respectively arranged at the bottom of the left and right ends of the mounting plate (3), the inner ends of the two driving members are respectively connected to the corresponding positions of the gear set, and two pneumatic expansion members are also included, the upper ends of the two pneumatic expansion members are respectively connected to the driving members at the corresponding positions in a movable manner, and the lower ends of the two pneumatic expansion members are respectively extended into the matching grooves (6) at the top of the sand core (5) in the working state.

2. According to claim 1, a novel pneumatic expansion core setting device capable of realizing fast and firm clamping is characterized in that: The gear set comprises a first bevel gear (7), the first bevel gear (7) being coaxially fixedly sleeved on the motor shaft of the first motor (4), and second bevel gears (8) being meshedly connected on the left and right sides of the first bevel gear (7), and the two second bevel gears (8) are respectively connected to the inner ends of the driving member at corresponding positions.

3. According to claim 2, a new type of pneumatic expansion core setting device capable of realizing fast and firm clamping is characterized in that: The driving member comprises a screw rod (9) and two fixing blocks (10), the two fixing blocks (10) are fixedly connected to the bottom of the mounting plate (3) at intervals, the two ends of the screw rod (9) are respectively movably inserted into the rotating holes of the two fixing blocks (10), the inner end of the screw rod (9) passes through the fixing blocks (10) at corresponding positions and is coaxially fixedly connected to the second bevel gear (8) on the same side, and a threaded hole (11) is opened on the upper part of the pneumatic expansion member, and the threaded section of the screw rod (9) is movably matched with the threaded hole (11).

4. According to claim 3, a novel pneumatic expansion core setting device capable of realizing fast and firm clamping is characterized in that: The pneumatic expansion member comprises a moving block (12), the threaded hole (11) is provided in the middle of the moving block (12) through the horizontal direction, a first connecting sleeve (13) is fixedly connected to the bottom of the moving block (12), a cylinder (16) is fixedly connected to the inner cavity of the first connecting sleeve (13), a first through hole (17) is provided at a corresponding position on the bottom surface of the first connecting sleeve (13), the end of the telescopic rod on the lower side of the cylinder (16) passes through the first through hole (17), a second connecting sleeve (14) is fixedly connected to the bottom of the first connecting sleeve (13), the telescopic rod of the cylinder (16) passes through the inner cavity of the second connecting sleeve (14), a silicone expansion sleeve (15) is fixedly connected to the bottom of the second connecting sleeve (14), a mounting hole (18) is provided at a corresponding position on the top of the silicone expansion sleeve (15), and the end of the telescopic rod of the cylinder (16) is fixedly connected to the inside of the mounting hole (18); In the working state, the two silicone expansion sleeves (15) extend into the matching grooves (6) at the top of the sand core (5) respectively.

5. According to claim 4, a novel pneumatic expansion core setting device capable of realizing fast and firm clamping is characterized in that: The leveling assembly comprises a connecting seat (19) and a second motor (22), wherein the connecting seat (19) and the second motor (22) are fixedly connected to the top of the mounting plate (3) at intervals, and support plates (20) are respectively fixedly connected to the two ends of the top of the connecting seat (19), and further comprises a rotating shaft (21), wherein the two ends of the rotating shaft (21) are respectively movable through the rotating holes of the two support plates (20), and one end of the rotating shaft (21) is coaxially fixedly connected to the motor shaft of the second motor (22), and a cable (26) is wound around the rotating shaft (21), and the upper end of the cable (26) is fixedly mounted on the connecting block (2).

6. A novel pneumatic expansion core setting device capable of realizing fast and firm clamping according to claim 5, characterized in that: A first plug hole (23) is provided at an end of the rotating shaft (21) away from the second motor (22), a second plug hole (24) is provided at a corresponding position on the top of the mounting plate (3), and a locking rod (25) is also provided. In a working state, the locking rod (25) is inserted into the first plug hole (23) and the second plug hole (24) in sequence.

7. A novel pneumatic expansion core setting device capable of realizing fast and firm clamping according to claim 6, characterized in that: Slide rails (27) are fixedly connected to the bottom of the left and right ends of the mounting plate (3), respectively, and a slide groove (28) is provided on the top of the moving block (12), and the two slide rails (27) are slidably connected with the slide grooves (28) at corresponding positions.

8. A novel pneumatic expansion core setting device capable of realizing fast and firm clamping according to claim 7, characterized in that: An air regulating valve (29) is fixedly connected to the top of the mounting plate (3), and the air regulating valve (29) is respectively connected to the cylinder (16) at corresponding positions through two PU air pipes (30).

9. A novel pneumatic expansion core setting device capable of realizing fast and firm clamping according to claim 8, characterized in that: A second through hole (31) is provided in the middle of the mounting plate (3), a protective cover (32) is fixedly connected to the middle of the top surface of the mounting plate (3), the first motor (4) is fixedly connected to the protective cover (32), and the motor shaft of the first motor (4) passes through the second through hole (31) and is coaxially fixedly connected to the first bevel gear (7).

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