Precise polishing device for sand mold casting part

Abstract

The invention relates to the technical field of sand mold casting part machining, and discloses a sand mold casting part precision polishing device which comprises a base, a supporting column, a supporting plate and a polishing table, the supporting column is fixedly connected to the rear side of the base, the supporting plate is installed on the front side of the supporting column, and a vertical adjusting mechanism is arranged in the supporting column; a dust falling mechanism is arranged at the top of the supporting plate. Through mutual cooperation of the adjusting mechanisms, different parts of a workpiece make uniform contact with the polishing wheel, it is ensured that the polishing effect of the whole workpiece surface is consistent, the yield of workpiece polishing machining is improved, the adaptability of the polishing device is improved, meanwhile, under cooperation of the dust falling mechanism, polishing liquid can be sprayed to the workpiece surface when the workpiece is polished, and the polishing efficiency is improved. By wetting the surface of a workpiece, the polishing solution can adsorb and bond fine dust particles and reduce dust flying, so that the cleanliness of the working environment is improved, the polishing effect can be improved, and friction heat is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sand mold casting processing, in particular to a sand mold casting precision polishing device. Background Art

[0002] Sand castings are metal parts made by sand casting process, which are widely used in machinery, automobile, aerospace and other industries. In order to improve the surface finish and appearance of the castings and improve their performance, polishing devices are used to grind and polish the castings.

[0003] The existing polishing device lacks a corresponding adjustment device when processing castings, resulting in the inability to flexibly adjust the polishing device during actual use to polish different positions of the workpiece, affecting the processing accuracy and effect of the polishing device. At the same time, a large amount of dust will be generated during the polishing process of the workpiece, which will not only pollute the working environment and affect the air quality, but also pose a threat to the health of the processing personnel. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a sand mold casting precision polishing device to solve the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: The present invention provides a sand mold casting precision polishing device,

[0006] It includes a base, a support column, a support plate and a polishing table, the support column is fixedly connected to the rear side of the base, the support plate is installed on the front side of the support column, the polishing table is installed on the top of the base, a polishing motor is installed on the top of the support plate, the output end at the bottom of the polishing motor is connected to the polishing shaft and the polishing wheel, a vertical adjustment mechanism is arranged inside the support column; a dust reduction mechanism is arranged on the top of the support plate.

[0007] Preferably, the vertical adjustment mechanism includes a sliding groove, a screw rod, a servo motor and a movable block, the sliding groove is opened at the front side of the support column, one end of the screw rod is connected to the bottom of the inner wall of the sliding groove through a bearing, the other end of the screw rod passes through the top of the support column, the servo motor is installed on the top of the support column, the output end of the servo motor is fixedly connected to the top of the screw rod, the movable block is threadedly connected to the inside of the sliding groove, and the movable block is threadedly connected to the surface of the screw rod, and the movable block is fixedly connected to the support plate; the dust reduction mechanism includes a liquid storage tank, a self-priming pump, a connecting pipe, a liquid outlet pipe and a nozzle, the liquid storage tank is connected to the top of the support plate, polishing liquid is provided inside the liquid storage tank, the self-priming pump is installed on the top of the support plate, one end of the connecting pipe is connected to the top of the self-priming pump, the other end of the connecting pipe is connected to the top of the liquid storage tank, one end of the liquid outlet pipe is connected to the rear side of the self-priming pump, the other end of the liquid outlet pipe passes through the bottom of the support plate, and the nozzle is connected to the end of the liquid outlet pipe.

[0008] Preferably, a rotating mechanism is provided inside the base, and the rotating mechanism includes a connecting column, a gear, a rotating motor and an output wheel, one end of the connecting column is fixedly connected to the bottom of the polishing table, the other end of the connecting column passes through the base and is connected to the bottom of the inner wall of the base through a bearing, the gear is sleeved on the surface of the connecting column, the rotating motor is installed inside the inner wall of the base, the output wheel is fixedly connected to the output shaft at the top of the rotating motor, and the output wheel is meshed with the gear.

[0009] Preferably, a circular groove is formed on the top of the base, and a sliding column is fixedly connected to the bottom of the polishing table. The sliding column is slidably connected to the inside of the circular groove. There are several sliding columns, which are evenly distributed on the bottom of the polishing table.

[0010] Preferably, a fixing mechanism is provided inside the polishing table, and the fixing mechanism comprises a column, a disc, an arc groove, a limiting rod, a cylinder, a fixing piece, a toothed disc, a gear rod and an adjustable cylinder, the column is connected to the bottom of the inner wall of the polishing table through a bearing, the disc is fixedly connected to the top of the column, the arc groove is opened at the top of the disc, the arc groove passes through to the bottom of the disc, there are two arc grooves, and they are relatively distributed on the disc, the limiting rod is fixedly connected to the inner wall of the polishing table, the cylinders are respectively slidably connected to the inside of the arc groove, and the cylinders are slidably connected to the surface of the limiting rod, the top of the cylinder passes through the top of the polishing table, the fixing pieces are respectively fixedly connected to the top of the cylinder, the toothed disc is sleeved on the surface of the column and is located at the bottom of the disc, the gear rod is meshingly connected to one side of the geared disc, the adjustable cylinder is fixedly installed inside the polishing table, and the output end of the adjustable cylinder is fixedly connected to the gear rod.

[0011] Preferably, a sliding block is fixedly connected to the top of the gear rod, a sliding rod is fixedly connected to the inner wall of the polishing table, and the sliding block is slidably connected to the surface of the sliding rod.

[0012] Preferably, a transverse groove is provided on the top of the polishing table, and the cylinders are slidably connected to the inside of the transverse groove.

[0013] Preferably, the top of the liquid storage tank is connected to a liquid injection pipe, and the liquid injection pipe is conical in shape.

[0014] Preferably, an observation window is provided on one side of the liquid storage tank, and a scale line is provided on one side of the observation window.

[0015] Preferably, a guide groove is provided on the top of the base, and there are several guide grooves which are evenly distributed on the top of the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the workpiece is placed on the polishing table for polishing, if the polishing position needs to be adjusted, the servo motor can be operated. The operation of the servo motor drives the screw rod to rotate forward, and the forward rotation of the screw rod drives the threaded movable block to move slowly and steadily downward inside the sliding groove. The downward movement of the movable block can drive the support plate to move downward, and the downward movement of the support plate can drive the polishing motor, the polishing shaft and the polishing wheel to move downward. The servo motor can be reversed to move it upward, thereby flexibly adjusting the polishing position according to the workpiece, and polishing the workpiece at different heights;

[0018] When it is necessary to process other positions of the workpiece, the rotating motor can also be operated. The operation of the rotating motor will drive the output wheel to rotate. The rotation of the output wheel can drive the meshing connected gear to rotate slowly. The rotation of the gear can drive the top polishing table and the workpiece to rotate through the connecting column, thereby flexibly adjusting the workpiece to polish different positions of the workpiece, thereby improving the polishing accuracy of the workpiece;

[0019] During the polishing process, a self-priming pump can be operated. After the self-priming pump is running, the polishing liquid inside the liquid storage tank can be extracted through the connecting pipe, and then the polishing liquid is sprayed onto the workpiece through the liquid outlet pipe and the nozzle. The polishing liquid can increase the glossiness of the workpiece surface and improve the polishing effect of the workpiece. At the same time, under the action of the polishing liquid, the dust generated during the polishing process can be reduced, and the flying dust can be reduced, thereby improving the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a sand mold casting precision polishing device of the present invention;

[0021] Figure 2 A top-down cross-sectional perspective schematic diagram of a polishing table of a sand mold casting precision polishing device of the present invention;

[0022] Figure 3 It is a disassembled stereoscopic schematic diagram of a fixing mechanism of a sand mold casting precision polishing device of the present invention;

[0023] Figure 4 It is a three-dimensional schematic diagram of the sliding connection between the sliding column and the circular groove of a sand mold casting precision polishing device of the present invention;

[0024] Figure 5 It is a three-dimensional schematic diagram of a rotating mechanism of a sand mold casting precision polishing device of the present invention;

[0025] Figure 6 The present invention is a three-dimensional schematic diagram of a vertical adjustment mechanism of a sand mold casting precision polishing device.

[0026] In the figure: 1. base; 101. connecting column; 102. gear; 103. rotating motor; 104. output wheel; 105. circular groove; 106. sliding column; 2. supporting column; 201. sliding groove; 202. screw rod; 203. servo motor; 204. movable block; 3. supporting plate; 301. liquid storage tank; 302. self-priming pump; 303. connecting pipe; 304. liquid outlet pipe; 305. nozzle; 4. polishing table; 401. column; 402. disc; 403. arc groove; 404. limit rod; 405. cylinder; 406. fixing part; 407. toothed disc; 408. gear rod; 409. adjustable cylinder; 410. slider; 411. slide rod; 5. horizontal groove; 6. liquid injection pipe; 7. observation window; 8. guide groove. DETAILED DESCRIPTION

[0027] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0028] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0030] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] Unless otherwise stated, the term "plurality" means two or more.

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0033] See also Figure 1-6 The present invention discloses a sand mold casting precision polishing device, comprising a base 1, a support column 2, a support plate 3 and a polishing table 4, wherein the support column 2 is fixedly connected to the rear side of the base 1, the support plate 3 is installed on the front side of the support column 2, the polishing table 4 is installed on the top of the base 1, a polishing motor is installed on the top of the support plate 3, and a polishing shaft and a polishing wheel are connected to the output end of the bottom of the polishing motor. A vertical adjustment mechanism is arranged inside the support column 2; a dust reduction mechanism is arranged on the top of the support plate 3; the vertical adjustment mechanism comprises a sliding groove 201, a screw rod 202, a servo motor 203, a servo motor 204, a servo motor 205, a servo motor 206, a servo motor 207, a servo motor 208, a servo motor 209, a servo motor 210, a servo motor 211, a servo motor 212, a servo motor 213, a servo motor 214, a servo motor 215, a servo motor 216, a servo motor 217, a servo motor 218, a servo motor 219, a servo motor 220, a servo motor 221, a servo motor 222, a servo motor 224, a servo motor 225, a servo motor 226, a servo motor 227, a servo motor 228, a servo motor 229, a servo motor 230, a servo motor 231, a servo motor 232, a servo motor 233, a servo motor 234, a servo motor 235, a servo motor The servo motor 203 and the movable block 204, the sliding groove 201 is opened on the front side of the support column 2, one end of the screw rod 202 is connected to the bottom of the inner wall of the sliding groove 201 through a bearing, and the other end of the screw rod 202 passes through the top of the support column 2, the servo motor 203 is installed on the top of the support column 2, the output end of the servo motor 203 is fixedly connected to the top of the screw rod 202, the movable block 204 is threadedly connected to the inside of the sliding groove 201, and the movable block 204 is threadedly connected to the surface of the screw rod 202, and the movable block 204 is fixedly connected to the support plate 3.

[0034] The dust reduction mechanism includes a liquid storage tank 301, a self-priming pump 302, a connecting pipe 303, a liquid outlet pipe 304 and a nozzle 305. The liquid storage tank 301 is connected to the top of the support plate 3, and polishing liquid is arranged inside the liquid storage tank 301. The self-priming pump 302 is installed on the top of the support plate 3, one end of the connecting pipe 303 is connected to the top of the self-priming pump 302, and the other end of the connecting pipe 303 is connected to the top of the liquid storage tank 301, one end of the liquid outlet pipe 304 is connected to the rear side of the self-priming pump 302, and the other end of the liquid outlet pipe 304 passes through the bottom of the support plate 3, the nozzle 305 is connected to the end of the liquid outlet pipe 304, and a rotating mechanism is arranged inside the base 1.

[0035] The rotating mechanism includes a connecting column 101, a gear 102, a rotating motor 103 and an output wheel 104. One end of the connecting column 101 is fixedly connected to the bottom of the polishing table 4, and the other end of the connecting column 101 passes through the base 1 and is connected to the bottom of the inner wall of the base 1 through a bearing. The gear 102 is sleeved on the surface of the connecting column 101, and the rotating motor 103 is installed inside the inner wall of the base 1. The output wheel 104 is fixedly connected to the output shaft at the top of the rotating motor 103, and the output wheel 104 is meshed with the gear 102.

[0036] Through the mutual cooperation of the adjustment mechanism, different parts of the workpiece can be evenly contacted with the polishing wheel, ensuring the consistency of the polishing effect on the entire workpiece surface, improving the yield of the workpiece polishing process, and enhancing the adaptability of the polishing device. At the same time, with the cooperation of the dust reduction mechanism, when polishing the workpiece, the polishing liquid can be sprayed on the workpiece surface. The polishing liquid can absorb and bond fine dust particles by wetting the workpiece surface, reduce dust flying, thereby improving the cleanliness of the working environment, and can also improve the polishing effect and reduce the generation of frictional heat.

[0037] See also Figure 4 A circular groove 105 is provided on the top of the base 1, and a sliding column 106 is fixedly connected to the bottom of the polishing table 4. The sliding column 106 is slidably connected to the inside of the circular groove 105. There are several sliding columns 106, which are evenly distributed at the bottom of the polishing table 4. When the rotating mechanism drives the polishing table 4 to rotate, the polishing table 4 will drive the sliding column 106 at the bottom inside the circular groove 105, which can not only assist in limiting the polishing table 4, but also rotate along the trajectory of the circular groove 105 when the polishing table 4 rotates. It can also improve the stability of the polishing table 4 during rotation under the connection support of the sliding column 106 to prevent the polishing table 4 from shaking during rotation.

[0038] See also Figure 2-3The polishing table 4 is provided with a fixing mechanism inside, which includes a column 401, a disc 402, an arc groove 403, a limiting rod 404, a column 405, a fixing part 406, a toothed disc 407, a toothed rod 408 and an adjustable cylinder 409. The column 401 is connected to the bottom of the inner wall of the polishing table 4 through a bearing, the disc 402 is fixedly connected to the top of the column 401, the arc groove 403 is opened at the top of the disc 402, and the arc groove 403 runs through the bottom of the disc 402. There are two arc grooves 403, which are relatively distributed on the disc 402. The limiting rod 405 is provided with a fixing mechanism inside, which includes a column 401, a disc 402, an arc groove 403, a limiting rod 404, a fixing part 406, a toothed disc 407, a toothed rod 408 and an adjustable cylinder 409. The column 401 is connected to the bottom of the inner wall of the polishing table 4 through a bearing, the disc 402 is fixedly connected to the top of the column 401, the arc groove 403 is opened at the top of the disc 402, and the arc groove 403 runs through to the bottom of the disc 402. There are two arc grooves 403, which are relatively distributed on the disc 402. 04 is fixedly connected to the inner wall of the polishing table 4, the cylinders 405 are slidably connected to the inside of the arc groove 403, and the cylinders 405 are slidably connected to the surface of the limiting rod 404, the top of the cylinder 405 passes through the top of the polishing table 4, the fixing parts 406 are fixedly connected to the top of the cylinder 405, the toothed disc 407 is sleeved on the surface of the column 401 and is located at the bottom of the disc 402, the gear rod 408 is meshed and connected to one side of the geared disc 407, and the adjustable cylinder 409 is fixedly installed inside the polishing table 4, and the output end of the adjustable cylinder 409 is fixedly connected to the gear rod 408.

[0039] When the workpiece is placed on the polishing table 4 for polishing, in order to prevent the workpiece from being displaced on the polishing table 4, the adjustable cylinder 409 can be operated. The operation of the adjustable cylinder 409 will push the gear rod 408 to move backward. The backward movement of the gear rod 408 will drive the meshing gear disk 407 to rotate. The rotation of the gear disk 407 will also drive the column 401 and the disc 402 to rotate. The rotation of the disc 402 can squeeze the cylinder 405 to slide inside the arc groove 403. At the same time, the limiting rod 404 can assist in squeezing the cylinder 405 to move inward at the same time. The simultaneous inward movement of the cylinder 405 will drive the fixing part 406 to move inward at the same time. The simultaneous inward movement of the fixing part 406 will squeeze the workpiece and squeeze the workpiece to fix it on the polishing table 4, thereby preventing the workpiece from being displaced during polishing and affecting the polishing accuracy of the workpiece, thereby ensuring the uniformity and accuracy of the workpiece polishing.

[0040] See also Figure 3 A slider 410 is fixedly connected to the top of the gear rod 408, and a slider 411 is fixedly connected to the inner wall of the polishing table 4. The slider 410 is slidably connected to the surface of the slider 411. When the adjustable cylinder 409 pushes the gear rod 408 to move, the gear rod 408 can drive the slider 410 to slide on the surface of the slider 411, thereby assisting in limiting the gear rod 408, so that the gear rod 408 can move smoothly, and prevent the gear rod 408 from being displaced and offset when moving and disconnected from the toothed disc 407.

[0041] See also Figure 1 and Figure 4A transverse groove 5 is provided on the top of the polishing table 4, and the cylinders 405 are slidably connected to the inside of the transverse groove 5. When the connecting column 101 drives the fixing part 406 to move, the connecting column 101 can move flexibly inside the transverse groove 5, so that the connecting column 101 has sufficient space for movement, thereby preventing the connecting column 101 from colliding with the polishing table 4 when moving, causing motion interference and affecting the normal operation of the fixing mechanism.

[0042] See also Figure 1 The top of the liquid storage tank 301 is connected to a liquid injection pipe 6, and the liquid injection pipe 6 is conical. The conical liquid injection pipe 6 design helps the polishing liquid to flow smoothly into the liquid storage tank 301, reducing the possibility of polishing liquid splashing during the process of injecting polishing liquid into the liquid storage tank 301, thereby ensuring the accuracy of liquid injection, and the polishing liquid can be conveniently replenished into the liquid storage tank 301 through the liquid injection pipe 6.

[0043] See also Figure 1 An observation window 7 is provided on one side of the liquid storage tank 301, and a scale line is provided on one side of the observation window 7. The observation window 7 allows the operator to check the real-time liquid level in the liquid storage tank 301 at any time, and the scale line can assist the operator to timely understand the remaining polishing liquid in the liquid storage tank 301 to ensure that the polishing liquid is sufficient.

[0044] See also Figure 1 and Figure 4 A guide groove 8 is provided on the top of the base 1. There are several guide grooves 8 evenly distributed on the top of the base 1. The guide groove 8 can help the sprayed polishing liquid to be discharged from the base 1 along the guide groove 8, thereby preventing the polishing liquid from accumulating on the base 1 and affecting the workpiece processing environment.

[0045] Working principle: when the workpiece is placed on the polishing table 4 for polishing, if the polishing position needs to be adjusted, the servo motor 203 can be operated, and the operation of the servo motor 203 drives the screw rod 202 to rotate forward, and the forward rotation of the screw rod 202 will drive the threaded movable block 204 to move slowly and steadily downward inside the sliding groove 201, and the downward movement of the movable block 204 can drive the support plate 3 to move downward, and the downward movement of the support plate 3 can drive the polishing motor, the polishing shaft and the polishing wheel to move downward, and the servo motor 203 can be reversed to move it upward, thereby the polishing position can be flexibly adjusted according to the workpiece, and different heights of the workpiece can be polished. When other positions of the workpiece need to be processed, the rotating motor 103 can also be operated, and the operation of the rotating motor 103 will drive the output The wheel 104 rotates, and the rotation of the output wheel 104 can drive the meshing connected gear 102 to rotate slowly. The rotation of the gear 102 can drive the top polishing table 4 and the workpiece to rotate through the connecting column 101, thereby flexibly adjusting the workpiece to polish different positions of the workpiece, thereby improving the polishing accuracy of the workpiece. During the polishing process, the self-priming pump 302 can be operated. After the self-priming pump 302 is operated, the polishing liquid inside the liquid storage tank 301 can be extracted through the connecting pipe 303, and then the polishing liquid is sprayed onto the workpiece through the liquid outlet pipe 304 and the nozzle 305. The polishing liquid can increase the glossiness of the workpiece surface and improve the polishing effect of the workpiece. At the same time, under the action of the polishing liquid, the dust generated during the polishing process can be reduced, and the flying dust can be reduced, thereby improving the working environment.

[0046] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A sand mold casting precision polishing device, comprising a base (1), a support column (2), a support plate (3) and a polishing table (4), wherein the support column (2) is fixedly connected to the rear side of the base (1), the support plate (3) is installed on the front side of the support column (2), the polishing table (4) is installed on the top of the base (1), a polishing motor is installed on the top of the support plate (3), and the output end of the bottom of the polishing motor is connected to a polishing shaft and a polishing wheel, characterized in that: A vertical adjustment mechanism is provided inside the support column (2); and a dust reduction mechanism is provided on the top of the support plate (3).

2. A sand mold casting precision polishing device according to claim 1, characterized in that: The vertical adjustment mechanism comprises a sliding groove (201), a screw rod (202), a servo motor (203) and a movable block (204); the sliding groove (201) is opened on the front side of the support column (2); one end of the screw rod (202) is connected to the bottom of the inner wall of the sliding groove (201) through a bearing; the other end of the screw rod (202) penetrates to the top of the support column (2); the servo motor (203) is installed on the top of the support column (2); and the output end of the servo motor (203) is fixedly connected to the top of the screw rod (202); The movable block (204) is threadedly connected to the inside of the sliding groove (201), and the movable block (204) is threadedly connected to the surface of the screw rod (202), and the movable block (204) is fixedly connected to the support plate (3); The dust reduction mechanism comprises a liquid storage tank (301), a self-priming pump (302), a connecting pipe (303), a liquid outlet pipe (304) and a nozzle (305); the liquid storage tank (301) is connected to the top of the support plate (3); polishing liquid is arranged inside the liquid storage tank (301); the self-priming pump (302) is installed on the top of the support plate (3); one end of the connecting pipe (303) is connected to the top of the self-priming pump (302); the other end of the connecting pipe (303) is connected to the top of the liquid storage tank (301); and one end of the liquid outlet pipe (304) is connected to the rear side of the self-priming pump (302); The other end of the liquid outlet pipe (304) penetrates to the bottom of the support plate (3), and the nozzle (305) is connected to the end of the liquid outlet pipe (304).

3. A sand mold casting precision polishing device according to claim 1, characterized in that: A rotating mechanism is arranged inside the base (1), and the rotating mechanism comprises a connecting column (101), a gear (102), a rotating motor (103) and an output wheel (104); one end of the connecting column (101) is fixedly connected to the bottom of the polishing table (4); the other end of the connecting column (101) passes through the base (1) and is connected to the bottom of the inner wall of the base (1) via a bearing; and the gear (102) is sleeved on the surface of the connecting column (101); The rotating motor (103) is installed inside the inner wall of the base (1), and the output wheel (104) is fixedly connected to the output shaft at the top of the rotating motor (103), and the output wheel (104) is meshedly connected with the gear (102).

4. A sand mold casting precision polishing device according to claim 3, characterized in that: A circular groove (105) is formed on the top of the base (1), and a sliding column (106) is fixedly connected to the bottom of the polishing table (4). The sliding column (106) is slidably connected to the inside of the circular groove (105). There are a plurality of sliding columns (106) which are evenly distributed on the bottom of the polishing table (4).

5. The sand mold casting precision polishing device according to claim 1, characterized in that: The polishing table (4) is provided with a fixing mechanism inside, the fixing mechanism comprising a column (401), a disc (402), an arc groove (403), a limit rod (404), a column (405), a fixing member (406), a toothed disc (407), a toothed rod (408) and an adjustable cylinder (409), and the column (401) is connected to the bottom of the inner wall of the polishing table (4) through a bearing; The disc (402) is fixedly connected to the top of the column (401), the arc groove (403) is opened at the top of the disc (402), and the arc groove (403) penetrates to the bottom of the disc (402). There are two arc grooves (403) and they are relatively distributed on the disc (402). The limiting rod (404) is fixedly connected to the inner wall of the polishing table (4), and the cylinder (405) is slidably connected to the inside of the arc groove (403), and the cylinder (405) is slidably connected to the surface of the limiting rod (404); The top of the cylinder (405) penetrates to the top of the polishing table (4), the fixing members (406) are respectively fixedly connected to the top of the cylinder (405), and the toothed disc (407) is sleeved on the surface of the column (401) and is located at the bottom of the disc (402); The gear rod (408) is meshedly connected to one side of the gear disc (407), the adjustable cylinder (409) is fixedly installed inside the polishing table (4), and the output end of the adjustable cylinder (409) is fixedly connected to the gear rod (408).

6. A sand mold casting precision polishing device according to claim 5, characterized in that: A sliding block (410) is fixedly connected to the top of the gear rod (408), a sliding bar (411) is fixedly connected to the inner wall of the polishing table (4), and the sliding block (410) is slidably connected to the surface of the sliding bar (411).

7. A sand mold casting precision polishing device according to claim 5, characterized in that: A transverse groove (5) is provided on the top of the polishing table (4), and the cylinders (405) are respectively slidably connected to the inside of the transverse groove (5).

8. The sand mold casting precision polishing device according to claim 2, characterized in that: The top of the liquid storage tank (301) is connected to a liquid injection pipe (6), and the liquid injection pipe (6) is in a cone shape.

9. A sand mold casting precision polishing device according to claim 2, characterized in that: An observation window (7) is provided on one side of the liquid storage tank (301), and a scale line is provided on one side of the observation window (7).

10. The sand mold casting precision polishing device according to claim 1, characterized in that: The top of the base (1) is provided with a guide groove (8), and there are a plurality of guide grooves (8) which are evenly distributed on the top of the base (1).

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