Precision casting surface polishing treatment equipment and method

Abstract

The invention discloses precision casting surface polishing treatment equipment and method, and relates to the technical field of rotating surface grinding, the precision casting surface polishing treatment equipment comprises a grinding machine, a grinding wheel is arranged in the grinding machine, the interior of the grinding machine is connected with a telescopic table through an electric telescopic rod, and a clamping mechanism is arranged on the surface of the telescopic table. According to the automatic clamping device for the metal sleeve, automatic clamping work of the metal sleeve is completed, clamping of the inner wall of the metal sleeve is achieved, subsequent grinding and cutting of the rotating face of the metal sleeve by a grinding wheel are facilitated, meanwhile, chamfering positions at the two ends of the metal sleeve can be rounded and polished, and the problem that due to traditional two-side clamping, the two ends of the metal sleeve are difficult to grind and polish is solved; aiming at the grinding of the rotating surface of a metal piece, the mechanism is arranged, so that the stability and the high efficiency of the grinding of the rotating surface are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of rotating surface grinding, in particular to a precision casting surface grinding treatment device and method. Background Art

[0002] Grinding is a mechanical processing method for removing materials, using abrasives and grinding tools to remove excess material from the workpiece. It is widely used in the machinery manufacturing industry, mainly for the finishing of mechanical parts in the equipment manufacturing field, and plays a key role in the surface quality of parts; A grinding device for cylinder surface treatment described in the patent application with announcement number CN117798755A relates to the technical field of intelligent manufacturing equipment industry, and comprises a grinding frame, a control cabinet is fixedly arranged on one side of the grinding frame, a positioning assembly is movably arranged on the top of the grinding frame, the cylinder to be polished is axially limited and rotationally driven on the grinding frame by the positioning assembly, the surface of the cylinder is automatically polished in cooperation with the grinding mechanism, and the waste from the grinding of the cylinder surface is collected and processed; At present, when grinding precision castings for intelligent manufacturing, a large number of round hollow metal sleeves need to be ground and polished. However, the clamping when grinding and polishing the arc-shaped rotating surface of the metal sleeve will cause the two sides of the metal sleeve to be clamped and unable to be fully ground. As a result, when chamfering is required on both sides, the clamping direction needs to be changed again. At the same time, the clamping operation is complicated and it is difficult to control the force, which easily causes deformation of the metal sleeve. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a surface polishing treatment device and method for precision castings, which achieves the purpose of solving the above-mentioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a precision casting surface grinding treatment equipment, including a grinder, a grinding wheel is arranged inside the grinder, a telescopic table is connected to the inside of the grinder through an electric telescopic rod, and a clamping mechanism is arranged on the surface of the telescopic table; The clamping mechanism comprises: A first fixing plate, wherein the first fixing plate is a square plate-shaped structure, the bottom of the first fixing plate is fixedly connected to the top of the telescopic platform, one side of the first fixing plate is rotatably connected to the first electric telescopic rod through a bearing plate, one end of the first electric telescopic rod is provided with a fixing sleeve, and the first fixing plate is used to fix the first electric telescopic rod; A push rod, which is a strip-shaped rod structure, one end of which is fixedly connected to a second electric telescopic rod, one end of which is fixedly connected to a second fixed plate, the bottom of the second fixed plate is fixedly connected to the top of the telescopic platform, a push block is slidably connected inside the fixed sleeve, and the push rod can extend into the inner wall of the fixed sleeve to push the push block.

[0005] Preferably, a first spring is fixedly connected to an outer wall of the push block, a sliding groove is provided on an inner wall of the fixing sleeve, and the push block is slidably connected to the inner wall of the fixing sleeve via the sliding groove.

[0006] Preferably, the outer wall of the push block contacts with a stopper, one side of the stopper is fixedly connected to a cylinder, one end of the cylinder is fixedly connected to one side of the inner wall of the fixed sleeve, and the stopper is used to limit the position of the push block.

[0007] Preferably, the inner wall of the push block is provided with an auxiliary mechanism, the auxiliary mechanism comprises a groove, the groove is opened in the inner wall of the push block, the inner wall of the groove is slidably connected with a clamping block, and the clamping block is used to clamp the inner wall of the metal part.

[0008] Preferably, a second spring is fixedly connected to the outer wall of the clamping block, and one end of the second spring is fixedly connected to the inner wall of the groove.

[0009] Preferably, a rotating mechanism is provided on the outer wall of the first electric telescopic rod, and the rotating mechanism includes a connecting sleeve, a first tooth is fixedly connected to the outer wall of the connecting sleeve, a sliding rod is provided on one side of the connecting sleeve, a second tooth is provided on the inner wall of the sliding rod, the connecting sleeve is meshed with the second tooth provided on the inner wall of the sliding rod through the first tooth, a fixed block is slidably connected to the outer wall of the sliding rod, a one-way coarse valve and a one-way fine valve are provided on the inner wall of the fixed block, and a scale groove is provided on the outer wall of the sliding rod.

[0010] Preferably, the bottom of the sliding rod is fixedly connected to a limiting plate, the outer wall of the limiting plate is slidably connected to the inner wall of the fixed block, one side of the connecting sleeve is fixedly connected to a pull rod, one end of the pull rod is fixedly connected to an inclined plate, and the inclined plate is used to play a role in moving the airflow.

[0011] A method for polishing the surface of a precision casting comprises the following steps: S1: Start the grinding machine to control the grinding wheel to rotate, and then place the cylindrical hollow metal part to be processed between the push rod and the fixed sleeve; S2: The metal piece is fixed to the outside of the fixing sleeve by starting the first electric telescopic rod and the second electric telescopic rod to extend; S3: The first electric telescopic rod and the second electric telescopic rod are started to push the push rod into the fixed sleeve, and the push block is used to support the inner wall of the metal sleeve to complete the clamping of the metal sleeve; S4: At this time, the grinder is started to control the telescopic table to slide in the grinder, so that the clamped hollow metal part can be moved to the grinding wheel; S5: Start the grinding wheel to rotate at high speed to polish and grind the metal sleeve, and complete the grinding and polishing work on the arc-shaped rotating surface of the metal part.

[0012] The present invention provides a precision casting surface grinding treatment device and method, which has the following beneficial effects: 1. The present invention completes the automatic clamping of the metal sleeve by setting a clamping mechanism, realizes the clamping of the inner wall of the metal sleeve, and facilitates the subsequent grinding and cutting of the rotating surface of the metal sleeve by the grinding wheel. At the same time, the chamfers at both ends of the metal sleeve can be rounded and polished, avoiding the problem of traditional two-side clamping that makes it difficult to grind and polish the two ends of the metal sleeve. For the grinding of the rotating surface of the metal part, the mechanism is set to ensure the stability and efficiency of the grinding of the rotating surface.

[0013] 2. The present invention provides a clamping mechanism, thereby utilizing the elastic force of the second spring to tightly squeeze the clamping block against the inner wall of the metal sleeve to complete the clamping, so that even if the metal sleeves have different diameters, the clamping block can be extended and retracted to complete the adaptive clamping work, thereby improving its adaptability to the grinding of arc-shaped rotating surface workpieces; 3. The present invention provides an auxiliary mechanism. After the metal part is clamped by the clamping block, when it is fitted with the grinding wheel for grinding, the second spring will give the clamping block a certain rebound space, so as to avoid the problem of damage and deformation caused by the metal part and the grinding wheel fitting too tightly during high-speed grinding, thereby ensuring that the grinding of the rotating surface of the workpiece is as stable and smooth as possible.

[0014] 4. The present invention is provided with a rotating mechanism, so that when the grinding wheel grinds the rotating surface of the metal sleeve, the metal sleeve will automatically rotate to complete the uniform grinding of all the rotating surfaces of the metal sleeve. There is no need for manual rotation and changing different clamping methods, which is easy to operate. The automatic rotation grinding also makes the surface of the metal sleeve more evenly ground.

[0015] 5. The present invention sets a rotating mechanism, and the number of teeth of the first tooth and the slide rod can be used to freely set the number of rotations of the first electric telescopic rod, the push block and the metal sleeve during the entire upward stroke of the slide rod, so as to correspond to different degrees of grinding work on the corresponding metal sleeve, so that it automatically stops after the specified number of rotations and grinding. The stopping method also allows the staff to quickly understand the specific number of rotations, so that they can remove it to prevent the problem of excessive grinding.

[0016] 6. The present invention provides a rotating mechanism, and can judge the approximate number of rotations of the first electric telescopic rod by observing the scale groove at different positions of the sliding rod, which is convenient for subsequent operations of the staff and makes it easier to observe and understand the current rotation and grinding state of the metal sleeve.

[0017] 7. The present invention provides a rotating mechanism so that the second electric telescopic rod can rotate after each grinding, and the residues attached to the metal sleeve on the surface of the second electric telescopic rod, the push block and the clamping block can be thrown off, so as to ensure the cleanliness of the clamping block and the push block and reduce the subsequent damage to the metal sleeve caused by clamping. At the same time, the inclined plate can be driven to rotate through the pull rod to blow the air toward the push block and the clamping block, blow away the thrown metal chips, and prevent the push block and the clamping block from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 3 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 4 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 5 The cross-sectional structure of the clamping mechanism of the present invention is shown in FIG. Figure 1 ; Figure 6 The cross-sectional structure of the clamping mechanism of the present invention is shown in FIG. Figure 2 ; Figure 7 It is a schematic diagram of the motion state of the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of the motion state of the clamping mechanism of the present invention; Fig. 9 It is a schematic diagram of the motion state of the clamping mechanism of the present invention; Fig.10 It is a schematic diagram of the motion state of the auxiliary mechanism of the present invention; Fig.11 The structure diagram of the rotating mechanism of the present invention is shown in FIG. Figure 1 ; Fig.12 The structure diagram of the rotating mechanism of the present invention is shown in FIG. Figure 2 .

[0019] In the figure: 1 grinder, 2 clamping mechanism, 201 first fixed plate, 202 first electric telescopic rod, 203 fixed sleeve, 204 second fixed plate, 205 second electric telescopic rod, 206 push rod, 207 push block, 208 slide groove, 209 first spring, 210 cylinder, 211 block, 213 bearing plate, 3 auxiliary mechanism, 301 groove, 302 clamping block, 303 second spring, 4 rotating mechanism, 401 connecting sleeve, 402 first tooth, 403 slide rod, 404 second tooth, 405 limit plate, 406 fixed block, 407 one-way fine valve, 408 one-way coarse valve, 409 pull rod, 410 inclined plate, 411 scale groove, 5 grinding wheel, 6 telescopic table. DETAILED DESCRIPTION

[0020] Example 1: Please refer to Figure 1-5 The present invention provides a technical solution: a precision casting surface grinding treatment device, comprising a grinder 1, a grinding wheel 5 is arranged inside the grinder 1, a telescopic table 6 is connected to the inside of the grinder 1 through an electric telescopic rod, and a clamping mechanism 2 is arranged on the surface of the telescopic table 6; The clamping mechanism 2 comprises: A first fixing plate 201, which is a square plate-shaped structure. The bottom of the first fixing plate 201 is fixedly connected to the top of the telescopic platform 6. One side of the first fixing plate 201 is rotatably connected to the first electric telescopic rod 202 through a bearing plate 213. A fixing sleeve 203 is provided at one end of the first electric telescopic rod 202. The first fixing plate 201 is used to fix the first electric telescopic rod 202; Push rod 206, push rod 206 is a strip rod structure, one end of push rod 206 is fixedly connected to the second electric telescopic rod 205, one end of the second electric telescopic rod 205 is fixedly connected to the second fixed plate 204, the bottom of the second fixed plate 204 is fixedly connected to the top of the telescopic platform 6, and a push block 207 is slidably connected inside the fixed sleeve 203. Push rod 206 can extend into the inner wall of the fixed sleeve 203 to push the push block 207.

[0021] The outer wall of the push block 207 is fixedly connected with a first spring 209 , the inner wall of the fixed sleeve 203 is provided with a sliding groove 208 , and the push block 207 is slidably connected in the inner wall of the fixed sleeve 203 through the sliding groove 208 .

[0022] The outer wall of the push block 207 contacts with a stopper 211, one side of the stopper 211 is fixedly connected with a cylinder 210, one end of the cylinder 210 is fixedly connected to one side of the inner wall of the fixed sleeve 203, and the stopper 211 is used to limit the position of the push block 207; When in use, the grinder 1 is started to control the grinding wheel 5 to rotate, and then the cylindrical hollow metal piece to be processed is placed between the push rod 206 and the fixed sleeve 203, and then the first electric telescopic rod 202 and the second electric telescopic rod 205 are started to extend to fix the metal piece outside thereof. At this time, the grinder 1 is started to control the telescopic table 6 to slide in the grinder 1, so that the clamped and fixed hollow metal piece can be moved to the grinding wheel 5, so that it is polished and ground by the high-speed rotating grinding wheel 5, and the grinding and polishing work of the arc-shaped rotating surface of the metal piece is completed; By starting the first electric telescopic rod 202 and the second electric telescopic rod 205, the push rod 206 is pushed into the fixed sleeve 203, and the metal sleeve is put on the fixed sleeve 203 in advance. When the push rod 206 is inserted into the inner wall of the fixed sleeve 203, the front end of the push rod 206 will abut against the inclined surface of the front end of the push block 207 in the inner wall of the fixed sleeve 203, thereby exerting a component force to move outward on the push block 207, and then the push block 207 will slide outward in the inner wall of the slide groove 208, and the push block 207 will then pull the first A spring 209 deforms the push block 207 so that it is pushed outward against the inner wall of the metal sleeve, thereby completing the automatic clamping of the metal sleeve and clamping the inner wall of the metal sleeve, which is convenient for the subsequent grinding wheel 5 to grind and cut the rotating surface of the metal sleeve. At the same time, the chamfers at both ends of the metal sleeve can be rounded and polished, avoiding the problem of traditional two-side clamping that makes it difficult to grind and polish the two ends of the metal sleeve. For the grinding of the rotating surface of the metal part, the mechanism is set to ensure the stability and efficiency of the grinding of the rotating surface; Example 2: Please refer to Figure 1-10 On the basis of the first embodiment, the present invention provides a technical solution: an auxiliary mechanism 3 is provided on the inner wall of the push block 207, and the auxiliary mechanism 3 includes a groove 301, the groove 301 is opened in the inner wall of the push block 207, and a clamping block 302 is slidably connected to the inner wall of the groove 301, and the clamping block 302 is used to clamp the inner wall of the metal part.

[0023] The outer wall of the clamping block 302 is fixedly connected with a second spring 303, and one end of the second spring 303 is fixedly connected with the inner wall of the groove 301; When the push block 207 is pressed against the inner wall of the metal sleeve, the clamping block 302 in the groove 301 can be pressed against the inner wall of the metal sleeve and squeeze the second spring 303 to deform, so that the clamping block 302 is tightly squeezed against the inner wall of the metal sleeve by the elastic force of the second spring 303 to complete the clamping, so that even if the metal sleeves have different diameters, the clamping block 302 can be used to complete the adaptive clamping work, thereby improving its adaptability to the grinding of arc-shaped rotating surface workpieces; At the same time, after the metal piece is clamped by the clamping block 302 and then ground with the grinding wheel 5, the second spring 303 will give the clamping block 302 a certain rebound space, so that the metal piece can be prevented from being too tightly fitted with the grinding wheel 5, which may cause damage and deformation during high-speed grinding, thereby ensuring that the grinding of the rotating surface of the workpiece is as stable and smooth as possible. Example 3: Please refer to Figure 1-12 On the basis of the first and second embodiments, the present invention provides a technical solution: a rotating mechanism 4 is arranged on the outer wall of the first electric telescopic rod 202, and the rotating mechanism 4 includes a connecting sleeve 401, and a first tooth 402 is fixedly connected to the outer wall of the connecting sleeve 401, a sliding rod 403 is arranged on one side of the connecting sleeve 401, and a second tooth 404 is provided on the inner wall of the sliding rod 403, and the connecting sleeve 401 is meshed with the second tooth 404 provided on the inner wall of the sliding rod 403 through the first tooth 402, and a fixed block 406 is slidably connected to the outer wall of the sliding rod 403, and a one-way coarse valve 408 and a one-way fine valve 407 are arranged on the inner wall of the fixed block 406, and a scale groove 411 is provided on the outer wall of the sliding rod 403.

[0024] The bottom of the slide bar 403 is fixedly connected to a limit plate 405, the outer wall of the limit plate 405 is slidably connected to the inner wall of the fixed block 406, one side of the connecting sleeve 401 is fixedly connected to a pull rod 409, one end of the pull rod 409 is fixedly connected to an inclined plate 410, and the inclined plate 410 is used to play a role in moving the airflow; When the grinding wheel 5 rotates at high speed to grind the metal sleeve on the outer wall of the fixed sleeve 203, the high-speed rotating grinding wheel 5 will apply a force to the metal sleeve to make it rotate. Since the metal sleeve is clamped by the push block 207 and the clamping block 302, the rotational force will be transmitted to the push block 207, and then transmitted to the stopper 211, the cylinder 210, and the fixed sleeve 203 through the push block 207. The fixed sleeve 203 will drive the first electric telescopic rod 202 to rotate on the bearing plate 213. However, since the rotation of the first electric telescopic rod 202 will The second tooth 404 on the inner wall of the slide bar 403 is moved by the connecting sleeve 401 and the first tooth 402, so that the slide bar 403 slides and rises on the inner wall of the fixed block 406. The inner wall of the fixed block 406 is a closed space, which is connected to the outside through the one-way coarse valve 408 and the one-way fine valve 407. When the slide bar 403 slides and rises, air is slowly sucked in through the one-way fine valve 407. The opening of the one-way fine valve 407 is very small, so the air intake is severely limited, and the speed at which the slide bar 403 is moved by the first tooth 402 is limited. Similarly, the rotation speed of the connecting sleeve 401 and the first electric telescopic rod 202 is limited, so that when the grinding wheel 5 rotates and grinds the clamped metal sleeve at a high speed, the first electric telescopic rod 202, the push block 207 and the metal sleeve as a whole are given rotation space, and their rotation speed is limited to make their rotation speed very slow, so that when the grinding wheel 5 grinds the rotating surface of the metal sleeve, the metal sleeve is automatically rotated to complete the uniform grinding of all the rotating surfaces of the metal sleeve, without manual rotation and changing different clamping methods, which is easy to operate, and the surface of the metal sleeve is ground more evenly through automatic rotation grinding; As the grinding wheel 5 rotates continuously, the connecting sleeve 401 continuously pushes the sliding rod 403 to rise through the first tooth 402 until the sliding rod 403 rises completely to the top, at which time the limit plate 405 below the sliding rod 403 is stuck with the inner wall of the fixing block 406, and at this time the first tooth 402 and the first electric telescopic rod 202 and the metal sleeve will no longer rotate, thereby completing the prompt to the staff. The number of teeth of the first tooth 402 and the sliding rod 403 can be used to freely set the number of rotations of the first electric telescopic rod 202, the push block 207 and the metal sleeve during the entire rising stroke of the sliding rod 403, so as to target the corresponding processed metal sleeve, so that it automatically stops after the specified number of rotations and grinding. The stopping method is also convenient for the staff to quickly understand the specific number of rotations, so that it can be removed to prevent the problem of excessive grinding. At the same time, the sliding rod 403 can be raised to different positions, and the approximate number of rotations of the first electric telescopic rod 202 can be judged by observing the scale groove 411, which is convenient for the subsequent operation of the staff, making it easier to observe and understand the current rotation and grinding state of the metal sleeve; After the metal sleeve rotating surface is ground, the first electric telescopic rod 202 and the second electric telescopic rod 205 are started, the fixed sleeve 203 and the push rod 206 are released, and the metal sleeve loses the clamping of the push block 207 and the clamping block 302, so that the metal sleeve is removed. At this time, the sliding rod 403 begins to fall due to its own gravity and slides to the bottom on the inner wall of the fixed block 406, and drives the first tooth 402, the connecting sleeve 401, the first electric telescopic rod 202, and the second electric telescopic rod 205 to rotate to The initial position enables the second electric telescopic rod 205 to rotate after each grinding, and completes the removal of the residues attached to the metal sleeve on the surfaces of the second electric telescopic rod 205, the push block 207, and the clamping block 302, thereby ensuring the cleanliness of the clamping block 302 and the push block 207 and reducing the subsequent damage to the metal sleeve. At the same time, the inclined plate 410 is driven to rotate through the pull rod 409 to blow the air toward the push block 207 and the clamping block 302, and blow away the thrown metal chips to prevent the push block 207 and the clamping block 302 from being contaminated; When the sliding rod 403 slides down on the inner wall of the fixed block 406, the air will be squeezed out through the one-way thick valve 408. The diameter of the one-way thick valve 408 is large, so the sliding speed is not limited, so that the first electric telescopic rod 202 can be quickly rotated. The one-way fine valve 407 and the one-way thick valve 408 are both one-way ventilation valves, so the air flow direction is fixed and cannot flow back. A method for polishing the surface of a precision casting comprises the following steps: S1: Start the grinding machine 1 to control the grinding wheel 5 to rotate, and then place the cylindrical hollow metal part to be processed between the push rod 206 and the fixed sleeve 203; S2: The metal piece is fixed to the outside of the fixing sleeve 203 by starting the first electric telescopic rod 202 and the second electric telescopic rod 205 to extend; S3: The first electric telescopic rod 202 and the second electric telescopic rod 205 are started to push the push rod 206 into the fixed sleeve 203, and the push block 207 is used to support the inner wall of the metal sleeve to complete the clamping of the metal sleeve; S4: At this time, the grinder 1 is started to control the telescopic table 6 to slide in the grinder 1, so that the clamped hollow metal part can be moved to the grinding wheel 5; S5: Start the grinding wheel 5 to rotate at high speed to polish and grind the metal sleeve, thereby completing the grinding and polishing work on the arc-shaped rotating surface of the metal part.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision casting surface grinding treatment device, comprising a grinding machine (1), wherein a grinding wheel (5) is arranged inside the grinding machine (1), and a telescopic table (6) is connected to the inside of the grinding machine (1) via an electric telescopic rod, characterized in that: A clamping mechanism (2) is provided on the surface of the telescopic platform (6); The clamping mechanism (2) comprises: a first fixing plate (201), the first fixing plate (201) being a square plate-shaped structure, the bottom of the first fixing plate (201) being fixedly connected to the top of the telescopic platform (6), one side of the first fixing plate (201) being rotatably connected to the first electric telescopic rod (202) via a bearing plate (213), one end of the first electric telescopic rod (202) being provided with a fixing sleeve (203), and the first fixing plate (201) being used to fix the first electric telescopic rod (202); A push rod (206), the push rod (206) being a strip-shaped rod structure, one end of the push rod (206) being fixedly connected to a second electric telescopic rod (205), one end of the second electric telescopic rod (205) being fixedly connected to a second fixing plate (204), the bottom of the second fixing plate (204) being fixedly connected to the top of the telescopic platform (6), a push block (207) being slidably connected inside the fixing sleeve (203), and the push rod (206) being able to extend into the inner wall of the fixing sleeve (203) to play a role in pushing the push block (207).

2. The surface polishing equipment for precision castings according to claim 1, characterized in that: The outer wall of the push block (207) is fixedly connected to a first spring (209), the inner wall of the fixed sleeve (203) is provided with a sliding groove (208), and the push block (207) is slidably connected to the inner wall of the fixed sleeve (203) via the sliding groove (208).

3. The surface polishing equipment for precision castings according to claim 2, characterized in that: The outer wall of the push block (207) contacts a stopper (211), one side of the stopper (211) is fixedly connected to a cylinder (210), one end of the cylinder (210) is fixedly connected to one side of the inner wall of the fixing sleeve (203), and the stopper (211) is used to limit the position of the push block (207).

4. The surface polishing equipment for precision castings according to claim 3, characterized in that: The inner wall of the push block (207) is provided with an auxiliary mechanism (3), the auxiliary mechanism (3) comprising a groove (301), the groove (301) being opened in the inner wall of the push block (207), the inner wall of the groove (301) being slidably connected with a clamping block (302), the clamping block (302) being used to clamp the inner wall of the metal part.

5. The precision casting surface grinding treatment equipment according to claim 4, characterized in that: A second spring (303) is fixedly connected to the outer wall of the clamping block (302), one end of the second spring (303) is fixedly connected to the inner wall of the groove (301), and one end of the pushing block (207) forms an inclined surface.

6. The precision casting surface grinding treatment equipment according to claim 5, characterized in that: The outer wall of the first electric telescopic rod (202) is provided with a rotating mechanism (4), the rotating mechanism (4) comprising a connecting sleeve (401), the outer wall of the connecting sleeve (401) being fixedly connected with a first tooth (402), a sliding rod (403) being provided on one side of the connecting sleeve (401), the inner wall of the sliding rod (403) being provided with a second tooth (404), the connecting sleeve (401) being meshed with the second tooth (404) provided on the inner wall of the sliding rod (403) through the first tooth (402), the outer wall of the sliding rod (403) being slidably connected with a fixing block (406), the inner wall of the fixing block (406) being provided with a one-way coarse valve (408) and a one-way fine valve (407), and the outer wall of the sliding rod (403) being provided with a graduated groove (411).

7. The precision casting surface grinding treatment equipment according to claim 6, characterized in that: The bottom of the sliding rod (403) is fixedly connected to a limiting plate (405), the outer wall of the limiting plate (405) is slidably connected to the inner wall of the fixed block (406), one side of the connecting sleeve (401) is fixedly connected to a pull rod (409), one end of the pull rod (409) is fixedly connected to an inclined plate (410), and the inclined plate (410) is used to play a role in moving airflow.

8. A method for polishing the surface of a precision casting, according to a device for polishing the surface of a precision casting according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: starting the grinding machine (1) to control the grinding wheel (5) to rotate, and then placing the cylindrical hollow metal part to be processed between the push rod (206) and the fixed sleeve (203); S2: fixing the metal piece on the outside of the fixing sleeve (203) by starting the first electric telescopic rod (202) and the second electric telescopic rod (205) to extend; S3: starting the first electric telescopic rod (202) and the second electric telescopic rod (205) to push the push rod (206) into the fixed sleeve (203), and using the push block (207) to support the inner wall of the metal sleeve to complete the clamping of the metal sleeve; S4: At this time, the grinding machine (1) is started to control the telescopic table (6) to slide in the grinding machine (1), so that the clamped hollow metal part can be moved to the grinding wheel (5); S5: Start the grinding wheel (5) to rotate at high speed to polish and grind the metal sleeve, thereby completing the grinding and polishing work on the arc-shaped rotating surface of the metal part.

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