Workpiece clamping structure for grinding and polishing machining

Abstract

The workpiece clamping structure comprises a supporting assembly, an adjusting assembly, a first clamping assembly and a second clamping assembly, the supporting assembly is composed of a platform, a plurality of adsorption holes distributed in a circle are formed in the surface of the platform, and an adsorption mechanism is arranged between the platform and a supporting plate; the adjusting assembly is slidably connected with the interior of the supporting plate. The first clamping assembly and the second clamping assembly are fixedly installed on the edge of the platform, a clamping mechanism is arranged at the end of the first clamping assembly, and a positioning mechanism is arranged at the end of the second clamping assembly. The clamping assemblies arranged on the periphery are used for achieving stable clamping of workpieces, the adsorption mechanism is arranged at the bottom of the platform to achieve negative-pressure adsorption and fixation of thin workpieces, the clamping assemblies are used for workpiece positioning, the adsorption range is controlled through the adjusting assemblies so that uniform adsorption of the workpieces can be guaranteed, adsorption holes are blocked, and the adsorption efficiency is improved. When the square thin part is machined, the enough and uniform adsorption range can still be ensured, and the use performance of the clamping structure is improved.

Description

Technical Field

[0001] The present invention relates to a workpiece clamping structure for grinding and polishing processing, belonging to the technical field of workpiece processing. Background Art

[0002] Grinding and polishing processing is a surface processing technology widely used in the manufacturing industry. It is a technology that removes surface defects of workpieces through physical or chemical methods to improve surface finish and accuracy. Its main purpose is to remove surface burrs, oxide skins, roughness, and other impurities, thereby improving the appearance and function of products. Grinding and polishing processing is widely applied in multiple fields, including automobile manufacturing, aircraft manufacturing, electronic devices, watches, steel, aerospace, ships, medical devices, glass, ceramics, plastics, etc. Through grinding and polishing processing, the surface finish and accuracy of products can be improved, their commercial value can be increased, and their functionality and reliability can be improved. Grinding and polishing processing is an important surface processing technology with broad application prospects in the manufacturing industry. By selecting appropriate polishing methods, controlling polishing pressure and time, keeping polishing tools and abrasives clean, and paying attention to the polishing environment and other measures, the quality and efficiency of grinding and polishing processing can be ensured.

[0003] When performing grinding and polishing processing, the workpiece needs to be clamped. Workpiece clamping is an important device on the machine tool for fixing workpieces for processing. It usually consists of parts such as chucks, driving devices, positioning devices, and pads. These parts work together to ensure the stable clamping and precise positioning of the workpiece. The workpiece clamping structure is an essential part of the machine tool. Through reasonable design and selection of appropriate clamping structures, the stable clamping and precise positioning of the workpiece can be ensured, thereby improving the processing quality and production efficiency.

[0004] When clamping the workpiece, the stability of the workpiece can be ensured to improve the accuracy of grinding and polishing processing. However, when processing workpieces with different thicknesses and shapes, it is not easy to achieve stable fixation, and different models of jigs need to be used for operation, reducing the convenience of using the clamping structure. When processing thin workpieces, due to their thin thickness, a negative pressure adsorption method needs to be used for limiting. When using the same type of jig for clamping, damage may occur due to excessive clamping force. Moreover, when clamping thin workpieces with a square structure, the four corners of the workpiece cannot be effectively adsorbed, resulting in poor uniformity of the clamping force. It is difficult to ensure the structural stability during grinding and polishing, especially when clamping workpieces with a large length-width ratio, it is difficult to ensure sufficient adsorption force. Summary of the Invention

[0005] The present invention provides a workpiece clamping structure for grinding and polishing processing to solve the technical problem of difficult stable clamping of different workpieces during grinding and polishing processing.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a workpiece clamping structure for grinding and polishing processing. The workpiece clamping structure for grinding and polishing processing includes:

[0008] A support assembly, which is composed of a platform. The platform is fixedly connected to the edge of the support plate through a support rod, and the support plate is fixedly connected to the edge of the bottom plate through a support column. A plurality of circularly distributed adsorption holes are formed on the surface of the platform, and an adsorption mechanism is arranged between the platform and the support plate;

[0009] An adjustment assembly, which is slidably connected to the inside of the support plate and is correspondingly arranged below the adsorption mechanism;

[0010] A first clamping assembly and a second clamping assembly. The first clamping assembly and the second clamping assembly are both fixedly installed at the edge of the platform. A clamping mechanism is arranged at the end of the first clamping assembly, and a positioning mechanism is arranged at the end of the second clamping assembly. Both the clamping mechanism and the positioning mechanism are in fit connection with the surface of the platform. The clamping mechanism and the positioning mechanism are staggered and distributed around the platform, and the positioning mechanism is arranged above the clamping mechanism.

[0011] In this technical solution, the adsorption mechanism is composed of an inner enclosing plate and an outer enclosing plate. The inner enclosing plate is fixedly connected to the surface of the support plate. The top edge of the inner enclosing plate is fixedly connected to the platform through a plurality of uniformly distributed connecting columns. The outer enclosing plate is fixedly connected to the bottom of the platform. A plurality of uniformly distributed collar rings are arranged between the outer enclosing plate and the inner enclosing plate. The outer enclosing plate is located at the edge of the platform and the adsorption holes are located inside the outer enclosing plate. The connecting columns and the adsorption holes are staggered in distribution, and a gap for air circulation is arranged between the inner enclosing plate and the platform.

[0012] In this technical solution, one side cross-section of the collar ring is a Z-shaped structure. Adjacent collar rings are sleeved with each other. The collar rings located on the inner and outer sides are respectively in fit sliding connection with the outer wall of the inner enclosing plate and the inner wall of the outer enclosing plate. The collar ring is connected to the adjacent collar ring through a spring, and the collar ring located on the outer side is connected to the bottom of the outer enclosing plate through a spring. Adjacent collar rings are hermetically in fit connection. The top surface of the collar ring is in fit connection with the platform, and a plurality of collar rings are respectively corresponding to each circle of adsorption holes in distribution. A gap for air flow is formed between the top of the collar ring and the platform, and the gap is corresponding to the adsorption holes in distribution.

[0013] In this technical solution, the adjustment assembly is composed of a push block and a slider. The push block is fixedly connected to the top of the slider. Two symmetrically distributed chutes are formed on the surface of the support plate, and the slider is slidably connected inside the chute. The slider is of a T-shaped structure and is located below the support plate. The push block is in fit connection with the surface of the support plate, and a slope for contacting the bottom of the collar ring is arranged on one side of the top of the push block.

[0014] In this technical solution, a motor is fixedly installed at the bottom of the support plate. The output end of the motor is fixedly connected to a lead screw, and the distal end of the lead screw is rotatably connected to the bottom of the support plate. A slider is threadedly connected to the surface of the lead screw. The top surface of the push block and the bottom surface of the outer plate are at the same horizontal position, and the height of the outer plate is the same as that of the collar.

[0015] In this technical solution, an air pump is fixedly installed in the middle of the bottom plate. The air pump is fixedly connected to the middle of the support plate through a connecting pipe. The connecting pipes are connected by flanges, and the connecting pipe extends into the inner enclosure.

[0016] In this technical solution, the first clamping assembly consists of a first fixed seat. The first fixed seat is fixedly connected to both sides of the top of the platform. The inside of the first fixed seat is threadedly connected to a first screw rod, and the distal end of the first screw rod is rotatably connected to the inside of the clamping mechanism. The clamping mechanism consists of a movable seat, and the movable seat is fixedly connected to a first clamping plate. The first clamping plate is of a fan-shaped structure. The first clamping plate contacts the surface of the platform, and the side end of the first clamping plate contacts a workpiece on the surface of the platform. The first clamping plate is provided with a counterbore for the installation of other clamping plates, for clamping and fixing workpieces of different heights.

[0017] In this technical solution, the second clamping assembly consists of a second fixed seat. The second fixed seat is fixedly connected to both sides of the top of the platform, and the second fixed seat and the first fixed seat are staggeredly distributed. A second screw rod is threadedly connected to the inside of the second fixed seat. The distal end of the second screw rod is fixedly connected to a connecting shaft, and the connecting shaft is rotatably connected to the inside of a limiting shaft on one side of the positioning mechanism. The positioning mechanism consists of a cross plate. A limiting shaft is fixedly connected to the side wall of the cross plate, and the bottom and top of the cross plate are respectively fixedly connected to a second clamping plate and a cross bar.

[0018] In this technical solution, the surface of the platform is hermetically fitted with the first clamping plate and the second clamping plate respectively. The first clamping plate and the movable seat are perpendicularly distributed. The second clamping plate and the cross plate are perpendicularly distributed, and guide rods are fixedly connected to the side walls of the movable seat and the cross plate. The guide rods are respectively inserted through the inside of the first fixed seat and the second fixed seat.

[0019] In this technical solution, the length of the second clamping plate is less than that of the first clamping plate. Electric push rods are rotatably connected to the side walls of the cross bars on both sides of the second clamping plate. The telescopic ends of the electric push rods are rotatably connected to one end of a fitting plate, and the other end of the fitting plate is rotatably connected to the side wall of the cross plate. The number of the fitting plates is several. The side walls of adjacent fitting plates are hermetically fitted with each other. Each fitting plate is of a bent structure and contacts the surface of the platform, and the fitting plates are correspondingly arranged above the first clamping plate.

[0020] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0021] The positive and progressive effects of the present invention are as follows:

[0022] The workpiece clamping structure for grinding and polishing processing proposed above uses a platform to place the workpiece, and uses clamping components arranged around to achieve stable clamping of the workpiece. Moreover, it is applicable to clamping workpieces of different shapes. An adsorption mechanism is provided at the bottom of the platform to achieve negative pressure adsorption and fixation, which can be used for clamping thin workpieces, and solves the problem of damage caused by excessive force on the clamping components. At this time, the clamping components are used for workpiece positioning, and the adsorption range is controlled by an adjustment component to ensure uniform adsorption of the workpiece. At the same time, the adsorption holes are blocked by the fitting of the clamping components and the platform surface, so as to ensure a sufficient and uniform adsorption range during the processing of square thin workpieces. Especially when clamping long thin workpieces, the adsorption uniformity can be ensured, avoiding offset problems during grinding and polishing, and improving the service performance of the clamping structure. Description of the Drawings

[0023] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present invention.

[0024] Figure 2 It is a schematic three-dimensional structure diagram of the present invention before placing the workpiece.

[0025] Figure 3 It is a schematic top view structure diagram of the present invention.

[0026] Figure 4 It is a schematic internal three-dimensional structure diagram at the adjustment component of the present invention.

[0027] Figure 5 For the present invention Figure 4 It is a schematic diagram of a partial enlarged structure at position A in the present invention.

[0028] Figure 6 It is a schematic three-dimensional structure diagram at the peripheral plate of the present invention.

[0029] Figure 7 For the present invention Figure 6 It is a schematic diagram of a partial enlarged structure at position B in the present invention.

[0030] Figure 8 It is a schematic internal side view structure diagram of the present invention.

[0031] Figure 9 It is a schematic external front view structure diagram of the present invention.

[0032] Figure 10 It is a schematic external side view structure diagram of the present invention.

[0033] Description of the Reference Numerals

[0034] 100. Support assembly; 101. Platform; 102. Support rod; 103. Support plate; 104. Support column; 105. Bottom plate; 106. Adsorption hole; 107. Inner enclosure plate; 108. Connecting column; 109. Outer enclosure plate; 110. Spring; 111. Collar; 112. Air pump; 113. Connecting pipe; 114. Gap

[0035] 200. Adjustment assembly; 201. Pusher block; 202. Slide block; 203. Slide groove; 204. Motor; 205. Lead screw

[0036] 300. First clamping assembly; 301. First fixed seat; 302. First screw; 303. Movable seat; 304. First clamping plate; 305. Counterbore; 306. Guide rod; 307. Workpiece

[0037] 400. Second clamping assembly; 401. Second fixed seat; 402. Second screw; 403. Connecting shaft; 404. Second clamping plate; 405. Cross plate; 406. Limit shaft; 407. Cross bar; 408. Fitting plate; 409. Electric push rod Detailed implementation manners

[0038] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments

[0039] As Figure 1-10 shown, the workpiece clamping structure for grinding and polishing processing includes:

[0040] A support assembly 100, the support assembly 100 is composed of a platform 101, the platform 101 is fixedly connected to the edge of a support plate 103 through a support rod 102, and the support plate 103 is fixedly connected to the edge of a bottom plate 105 through a support column 104. A plurality of circularly distributed adsorption holes 106 are formed on the surface of the platform 101, and an adsorption mechanism is provided between the platform 101 and the support plate 103;

[0041] An adjustment assembly 200, the adjustment assembly 200 is slidably connected to the inside of the support plate 103, and the adjustment assembly 200 is correspondingly arranged below the adsorption mechanism;

[0042] A first clamping assembly 300 and a second clamping assembly 400, the first clamping assembly 300 and the second clamping assembly 400 are both fixedly installed on the edge of the platform 101. A clamping mechanism is provided at the end of the first clamping assembly 300, and a positioning mechanism is provided at the end of the second clamping assembly 400. Both the clamping mechanism and the positioning mechanism are in fitting connection with the surface of the platform 101, and the clamping mechanism and the positioning mechanism are staggered and distributed around the platform 101, and the positioning mechanism is arranged above the clamping mechanism.

[0043] The adsorption mechanism is composed of an inner enclosure plate 107 and an outer enclosure plate 109. The inner enclosure plate 107 is fixedly connected to the surface of the support plate 103. The top edge of the inner enclosure plate 107 is fixedly connected to the platform 101 through a plurality of evenly distributed connecting columns 108. The outer enclosure plate 109 is fixedly connected to the bottom of the platform 101. A plurality of evenly distributed collar rings 111 are arranged between the outer enclosure plate 109 and the inner enclosure plate 107. The outer enclosure plate 109 is located at the edge of the platform 101 and the adsorption holes 106 are located inside the outer enclosure plate 109. The connecting columns 108 and the adsorption holes 106 are staggered. An interval for air circulation is arranged between the inner enclosure plate 107 and the platform 101. One side cross-section of the collar ring 111 is a Z-shaped structure. Adjacent two collar rings 111 are sleeved with each other. The collar rings 111 located on the inner and outer sides are respectively in sliding fit with the outer wall of the inner enclosure plate 107 and the inner wall of the outer enclosure plate 109. The collar ring 111 is connected to the adjacent collar ring 111 through a spring 110. The collar ring 111 located on the outer side is connected to the bottom of the outer enclosure plate 109 through a spring 110. Adjacent collar rings 111 are in sealing fit with each other. The top surface of the collar ring 111 is in fit connection with the platform 101. A plurality of collar rings 111 are respectively distributed corresponding to each circle of adsorption holes 106. A gap 114 for air flow is formed between the top of the collar ring 111 and the platform 101. The gap 114 and the adsorption holes 106 are distributed corresponding to each other.

[0044] In this technical solution, when the adsorption mechanism is used to adsorb and clamp the thin part, the air inside the inner enclosure plate 107 and the collar ring 111 is pumped out. At this time, the spring 110 restricts the upward movement of the collar ring 111. The gap 114 between the collar ring 111 and the platform 101 is communicated with the adsorption holes 106, so that a negative pressure is formed on the surface of the platform 101 to adsorb the thin part. When it is a circular thin part, the adsorption range is determined according to its diameter. The adjustment assembly 200 is used to control the blocking of the adsorption holes 106 located on the periphery of the thin part, so as to realize the uniform adsorption of the circular thin part.

[0045] The adjusting assembly 200 is composed of a pushing block 201 and a sliding block 202. The pushing block 201 is fixedly connected to the top of the sliding block 202. Two symmetrically distributed sliding grooves 203 are formed on the surface of the support plate 103, and the sliding block 202 is slidably connected inside the sliding groove 203. The sliding block 202 is of a T-shaped structure and is located below the support plate 103. The pushing block 201 is in fit connection with the surface of the support plate 103, and an inclined surface in contact with the bottom of the collar 111 is formed on one side of the top of the pushing block 201. A motor 204 is fixedly installed at the bottom of the support plate 103. The output end of the motor 204 is fixedly connected to the lead screw 205. The distal end of the lead screw 205 is rotatably connected to the bottom of the support plate 103, and the sliding block 202 is threadedly connected to the surface of the lead screw. The top surface of the pushing block 201 and the bottom surface of the outer peripheral plate 109 are at the same horizontal position, and the height of the outer peripheral plate 109 is the same as the height of the collar 111. A gas pump 112 is fixedly installed in the middle of the bottom plate 105. The gas pump 112 is fixedly connected to the middle of the support plate 103 through a connecting pipe 113. The connecting pipe 113 is connected by a flange, and the connecting pipe 113 extends into the inner peripheral plate 107.

[0046] In this technical solution, after the thin workpiece 307 is placed on the platform 101, the first clamping assembly 300 and the second clamping assembly 400 are used to position the workpiece 307, and then the gas pump 112 is started. The gas pump 112 pumps out the gas inside the outer peripheral plate 109 through the connecting pipe 113. When it is necessary to adjust the adsorption range, the motor 204 is started to drive the lead screw 205 to rotate at the bottom of the support plate 103. The lead screw 205 drives the sliding block 202 to move inside the sliding groove 203, and then drives the pushing block 201 to move to the bottom of the outer peripheral plate 109. When the inclined surface on one side of the pushing block 201 contacts the outermost collar 111, it overcomes the elasticity of the spring 110 and makes the collar 111 abut against the bottom surface of the platform 101, thereby blocking the outermost adsorption holes 106. When moving continuously, the outer adsorption holes 106 are blocked in sequence, and it stops after reaching the circular thin part. At this time, the gap 114 is reduced to below the circular thin part, thereby realizing the uniform adsorption effect.

[0047] The first clamping assembly 300 is composed of a first fixed seat 301. The first fixed seat 301 is fixedly connected to both sides of the top of the platform 101. The inside of the first fixed seat 301 is threadedly connected to a first screw rod 302, and the distal end of the first screw rod 302 is rotatably connected to the inside of the clamping mechanism. The clamping mechanism is composed of a movable seat 303, and the movable seat 303 is fixedly connected to a first clamping plate 304. The first clamping plate 304 is of a sector structure. The first clamping plate 304 contacts the surface of the platform 101. A workpiece 307 on the surface of the platform 101 is in contact with the side end of the first clamping plate 304. The first clamping plate 304 is provided with a counterbore 305 to facilitate the installation of other clamping plates for clamping and fixing workpieces 307 of different heights. The second clamping assembly 400 is composed of a second fixed seat 401. The second fixed seat 401 is fixedly connected to both sides of the top of the platform 101, and the second fixed seat 401 and the first fixed seat 301 are staggeredly distributed. A second screw rod 402 is threadedly connected to the inside of the second fixed seat 401. The distal end of the second screw rod 402 is fixedly connected to a connecting shaft 403. The connecting shaft 403 is rotatably connected to the inside of a limiting shaft 406 on one side of the positioning mechanism. The positioning mechanism is composed of a cross plate 405. A limiting shaft 406 is fixedly connected to the side wall of the cross plate 405, and the bottom and top of the cross plate 405 are fixedly connected to a second clamping plate 404 and a cross bar 407 respectively.

[0048] In this technical solution, when clamping a relatively thick workpiece 307, a suitable fixture is fixed on the first clamping plate 304 through the counterbore 305. The first screw rod 302 is rotated to push the movable seat 303 and the first clamping plate 304 to translate, and the higher fixture is used to clamp and fix both sides of the workpiece 307. When clamping a thin workpiece, the edge of the thin workpiece is directly contacted by the first clamping plate 304. At this time, the clamping force of the first clamping plate 304 is controlled to decrease and it only serves as a positioning function, and then the adsorption mechanism is used for adsorption and fixation. Similarly, the second clamping plate 404 is pushed to contact the other two sides of the workpiece 307. When the second screw rod 402 is rotated, the connecting shaft 403 rotates synchronously. The connecting shaft 403 rotates in the limiting shaft 406 to push the cross plate 405 to translate, and stable transmission is achieved in cooperation with the guide rod 306.

[0049] The surface of the platform 101 is hermetically attached to the first clamping plate 304 and the second clamping plate 404 respectively. The first clamping plate 304 is vertically distributed with the movable seat 303, and the second clamping plate 404 is vertically distributed with the cross plate 405. The side walls of the movable seat 303 and the cross plate 405 are fixedly connected to the guide rod 306. The guide rod 306 penetrates and is inserted into the interiors of the first fixed seat 301 and the second fixed seat 401 respectively. The length of the second clamping plate 404 is less than that of the first clamping plate 304. Electric push rods 409 are rotatably connected to the side walls of the cross bars 407 on both sides of the second clamping plate 404. The telescopic ends of the electric push rods 409 are rotatably connected to one end of the fitting plate 408, and the other end of the fitting plate 408 is rotatably connected to the side wall of the cross plate 405. The number of the fitting plates 408 is several, and the side walls of adjacent fitting plates 408 are hermetically attached to each other. Each fitting plate 408 is in a bent structure and contacts the surface of the platform 101, and the fitting plates 408 are correspondingly arranged above the first clamping plate 304.

[0050] In this technical solution, when a square thin part needs to be clamped, the square thin part covers a number of adsorption holes 106. The moving quantity of the collar 111 is determined according to the width of the square thin part, that is, the number of the moving collars 111 is determined by the width of the square thin part. At this time, since the four sides of the square thin part are blocked by the collars 111, the four corners of the square thin part cannot receive the adsorption force. When grinding and polishing the four corners of the workpiece 307, due to the problems of reduced adsorption force and poor uniformity, the workpiece 307 may be offset.

[0051] Further, after adopting the first clamping assembly 300 and the second clamping assembly 400, the number of the moving collars 111 is determined by the length of the square thin part. At this time, move the first clamping assembly 300 to make the first clamping plate 304 fit against the long side of the square thin part for positioning, and the counterbore 305 is not communicated with the adsorption hole 106. Then, when moving the second clamping plate 404, it fits against the wide side of the square thin part. At this time, there is a distance between the two sides of the second clamping plate 404 and the first clamping plate 304. Control the electric push rod 409 to work according to the width of the square thin part, so that it pushes the fitting plate 408 to fit against the surface of the platform 101, so as to block the adsorption holes 106 at the distance. At this time, the first clamping plate 304, the second clamping plate 404 and the fitting plate 408 block the surrounding adsorption holes 106 of the square thin part. When the air inside the outer plate 109 is pumped out, all the adsorption holes 106 covered by the bottom of the square thin part form a negative pressure adsorption force, thereby ensuring the clamping stability of the square thin part. In particular, the four corners of the workpiece 307 are adsorbed and fixed, which can be used for fixing workpieces 307 of different shapes and thicknesses, improving the use performance of the clamping structure, and solving the problem of clamping and fixing different types of workpieces 307 with different clamping tools.

[0052] The present invention is not limited to the above-described embodiments. Any changes in its shape or structure shall fall within the protection scope of the present invention. The protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, and these changes and modifications shall all fall within the protection scope of the present invention.

Claims

1. A workpiece clamping structure for grinding and polishing, characterized in that: The workpiece clamping structure for grinding and polishing comprises: A support assembly (100), the support assembly (100) comprising a platform (101), the platform (101) being fixedly connected to the edge of a support plate (103) via a support rod (102), and the support plate (103) being fixedly connected to the edge of a bottom plate (105) via a support column (104), a plurality of circularly distributed adsorption holes (106) being provided on the surface of the platform (101), and an adsorption mechanism being provided between the platform (101) and the support plate (103); An adjustment component (200), the adjustment component (200) is slidably connected to the inside of the support plate (103), and the adjustment component (200) is correspondingly arranged below the adsorption mechanism; A first clamping assembly (300) and a second clamping assembly (400), wherein the first clamping assembly (300) and the second clamping assembly (400) are both fixedly mounted to the edge of the platform (101), a clamping mechanism is provided at the end of the first clamping assembly (300), and a positioning mechanism is provided at the end of the second clamping assembly (400), and both the clamping mechanism and the positioning mechanism are fitted and connected to the surface of the platform (101), and the clamping mechanism and the positioning mechanism are staggeredly distributed around the platform (101), and the positioning mechanism is arranged above the clamping mechanism.

2. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The adsorption mechanism is composed of an inner panel (107) and an outer panel (109); the inner panel (107) is fixedly connected to the surface of the support plate (103); the top edge of the inner panel (107) is fixedly connected to the platform (101) through a plurality of evenly distributed connecting columns (108); the outer panel (109) is fixedly connected to the bottom of the platform (101); a plurality of evenly distributed collars (111) are provided between the outer panel (109) and the inner panel (107); the outer panel (109) is located at the edge of the platform (101) and the adsorption holes (106) are located inside the outer panel (109); the connecting columns (108) and the adsorption holes (106) are staggeredly distributed; and a gap for air circulation is provided between the inner panel (107) and the platform (101).

3. The workpiece clamping structure for grinding and polishing as claimed in claim 2, characterized in that: The cross-section of one side of the collar (111) is a Z-shaped structure. Two adjacent collars (111) are sleeved with each other. The collars (111) located on the inner and outer sides are respectively fitted and slid with the outer wall of the inner panel (107) and the inner wall of the outer panel (109). The collar (111) is connected to adjacent collars (111) via a spring (110), and the collar (111) located on the outer side is connected to the bottom of the outer panel (109) via a spring (110). Adjacent collars (111) are sealed and fitted. The top surface of the collar (111) is fitted and connected with the platform (101), and a plurality of collars (111) are respectively distributed corresponding to each circle of adsorption holes (106). A gap (114) for airflow is formed between the top of the collar (111) and the platform (101), and the gap (114) is distributed corresponding to the adsorption holes (106).

4. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The adjusting assembly (200) is composed of a push block (201) and a slider (202); the push block (201) is fixedly connected to the top of the slider (202); the surface of the support plate (103) is provided with two symmetrically distributed slide grooves (203); the slide grooves (203) are slidably connected to the slider (202); the slider (202) is a T-shaped structure and is located below the support plate (103); the push block (201) is fittedly connected to the surface of the support plate (103); and a slope contacting the bottom of the ring (111) is provided on one side of the top of the push block (201).

5. The workpiece clamping structure for grinding and polishing as claimed in claim 4, characterized in that: A motor (204) is fixedly mounted on the bottom of the support plate (103); the output end of the motor (204) is fixedly connected to a lead screw (205); the distal end of the lead screw (205) is rotatably connected to the bottom of the support plate (103); a slider (202) is threadedly connected to the surface of the lead screw; the top surface of the push block (201) and the bottom surface of the outer plate (109) are located at the same horizontal position; and the height of the outer plate (109) is the same as the height of the collar (111).

6. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: An air pump (112) is fixedly installed in the middle of the bottom plate (105), and the air pump (112) is fixedly connected to the middle of the support plate (103) through a connecting pipe (113). The connecting pipe (113) is connected through a flange, and the connecting pipe (113) extends to the inside of the inner enclosure plate (107).

7. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The first clamping assembly (300) is composed of a first fixed seat (301), which is fixedly connected to both sides of the top of the platform (101), the first fixed seat (301) is threadedly connected to the first screw (302) inside, and the distal end of the first screw (302) is rotatably connected to the inside of the clamping mechanism, the clamping mechanism is composed of a movable seat (303), and the movable seat (303) is fixedly connected to the first clamping plate (304), the first clamping plate (304) is a fan-shaped structure, the first clamping plate (304) is in contact with the surface of the platform (101), the side end of the first clamping plate (304) is in contact with a workpiece (307) on the surface of the platform (101), and the first clamping plate (304) is provided with a countersunk hole (305) to facilitate the installation of other clamping plates, and is used for clamping and fixing workpieces (307) of different heights.

8. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The second clamping assembly (400) is composed of a second fixed seat (401), the second fixed seat (401) is fixedly connected to both sides of the top of the platform (101), and the second fixed seat (401) and the first fixed seat (301) are staggered, the second fixed seat (401) is internally threadedly connected to a second screw rod (402), the far end of the second screw rod (402) is fixedly connected to a connecting shaft (403), the connecting shaft (403) is internally rotatably connected to a limiting shaft (406) on one side of the positioning mechanism, the positioning mechanism is composed of a cross plate (405), the side wall of the cross plate (405) is fixedly connected to the limiting shaft (406), and the bottom and top of the cross plate (405) are respectively fixedly connected to the second clamping plate (404) and the cross bar (407).

9. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The surface of the platform (101) is sealed and fitted with the first clamping plate (304) and the second clamping plate (404) respectively; the first clamping plate (304) and the movable seat (303) are vertically distributed; the second clamping plate (404) and the transverse plate (405) are vertically distributed; and the side walls of the movable seat (303) and the transverse plate (405) are fixedly connected to the guide rod (306); and the guide rod (306) is inserted through the inside of the first fixed seat (301) and the second fixed seat (401) respectively.

10. The workpiece clamping structure for grinding and polishing as claimed in claim 1, characterized in that: The length of the second clamping plate (404) is smaller than that of the first clamping plate (304), and the side walls of the cross bar (407) on both sides of the second clamping plate (404) are rotatably connected to electric push rods (409), and the telescopic end of the electric push rod (409) is rotatably connected to one end of the bonding plate (408), and the other end of the bonding plate (408) is rotatably connected to the side wall of the cross plate (405). There are a plurality of bonding plates (408), and the side walls of adjacent bonding plates (408) are sealed and bonded to each other. Each bonding plate (408) is a bent structure and contacts the surface of the platform (101), and the bonding plates (408) are correspondingly arranged above the first clamping plate (304).

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