Device for grinding and polishing small-size compression or impact sample

Abstract

The utility model provides a device for grinding and polishing a small-size compression or impact sample, which comprises a frame-shaped support and a sample disc detachably connected through a supporting rod, an upper grinding and polishing mechanism and a lower grinding and polishing mechanism which are the same in structure are symmetrically arranged on the sample disc up and down, the upper grinding and polishing mechanism comprises an upper lifting assembly, and the upper lifting assembly is connected with an upper rotating assembly. The upper rotating assembly is detachably connected with an upper grinding and polishing assembly, and the lower grinding and polishing mechanism is correspondingly provided with a lower lifting assembly, a lower rotating assembly and a lower grinding and polishing assembly. By arranging the frame-shaped support and the supporting rod, the sample disc can be horizontally suspended conveniently, the upper grinding and polishing mechanism and the lower grinding and polishing mechanism which are the same in structure are symmetrically arranged on the sample disc up and down, automatic grinding and polishing of the upper end face or the lower end face or the side face of a compression or impact sample clamped on the sample disc are achieved, time and labor are saved, and efficiency is improved. The problems that a compressed or impacted sample falls off and fingers are abraded during manual grinding and polishing are solved, and the problems that the surface is uneven, grinding and polishing are uneven and the like during manual grinding and polishing are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding and polishing of small-sized compression or impact samples, and in particular relates to a device for grinding and polishing small-sized compression or impact samples. Background Art

[0002] For small compression specimens and Hopkinson dynamic impact specimens, a smooth surface without scratches is an important indicator to ensure data accuracy. Since most compression or impact specimens are made by wire cutting, corrosion will produce deep processing marks on the side during the cutting process. In the polishing process, not only the surface processing marks should be polished clean, but also the polishing marks left by the previous process should be removed in order to proceed to the next process. However, the compression or impact specimens prepared in the laboratory are small in size, especially the Hopkinson pressure bar test specimens, whose height is only about 3mm or less. The existing polishing devices are mainly for flat samples, and there is no good mechanical polishing device for small cylindrical compression or impact specimens. Manual polishing can easily produce uneven surfaces due to force differences, affecting the test results. At the same time, since the size of compression or impact specimens is generally small, especially the hardness of refractory alloys is high, hand-held polishing requires a high level of technical personnel on the one hand, and the polishing time of refractory alloys is long on the other hand, which will inevitably cause damage to the hands, seriously reducing the efficiency of specimen polishing.

[0003] Therefore, a device for grinding and polishing small-sized compression or impact specimens is needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for grinding and polishing small-sized compression or impact samples in view of the deficiencies of the above-mentioned prior art. The device is convenient for suspending the sample tray horizontally by setting a frame-shaped bracket and a support rod, and an upper grinding and polishing mechanism and a lower grinding and polishing mechanism with the same structure are symmetrically arranged above and below the sample tray, so as to realize automatic grinding and polishing of the upper and lower end faces or sides of the compression or impact sample clamped on the sample tray, saving time and labor, solving the problems of compression or impact sample falling off and finger abrasion during manual grinding and polishing, and solving the problems of uneven surface and uneven grinding and polishing caused by manual grinding and polishing.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for grinding and polishing small-sized compression or impact specimens, characterized in that the device includes a frame-shaped bracket, a sample tray is detachably connected to the middle part of the frame-shaped bracket through a support rod, and the sample tray is symmetrically provided with an upper grinding and polishing mechanism and a lower grinding and polishing mechanism with the same structure above and below, the upper grinding and polishing mechanism includes an upper lifting assembly connected to the frame-shaped bracket, an upper rotating assembly is connected to the upper lifting assembly, and the upper rotating assembly is detachably connected to the upper grinding and polishing assembly, and the lower grinding and polishing mechanism is correspondingly provided with a lower lifting assembly, a lower rotating assembly and a lower grinding and polishing assembly.

[0006] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the sample plate includes a rectangular hole sample plate with a plurality of rectangular holes arranged circumferentially with the center of the sample plate as the center, a square hole sample plate with a plurality of square holes arranged circumferentially with the center of the sample plate as the center, and a circular hole sample plate with a plurality of circular holes arranged circumferentially with the center of the sample plate as the center.

[0007] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the thickness of the sample disk is smaller than the height of the compression or impact specimen, and the thickness of the sample disk is smaller than the diameter and height of the compression or impact specimen.

[0008] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the sample disc and the upper grinding and polishing mechanism and the lower grinding and polishing mechanism are coaxial.

[0009] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the upper lifting assembly includes an upper cylinder connected to a frame-shaped bracket and an upper connecting rod connected to the upper cylinder, and the upper connecting rod is connected to an upper rotating assembly; the lower lifting assembly includes a lower cylinder connected to the frame-shaped bracket and a lower connecting rod connected to the lower cylinder, and the lower connecting rod is connected to a lower rotating assembly.

[0010] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the upper rotating component is an upper rotating motor, the output shaft of the upper rotating motor is connected to the center of the upper grinding and polishing component, and the lower rotating component is a lower rotating motor, the output shaft of the lower rotating motor is connected to the center of the lower grinding and polishing component.

[0011] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the upper grinding and polishing assembly includes an upper wheel disc, on which an upper grinder and polisher is arranged, and the upper wheel disc is also provided with an upper annular clamp for fixing the upper grinder and polisher and an upper screw for fixing the upper annular clamp to the upper wheel disc; the lower grinding and polishing assembly includes a lower wheel disc, under which a lower grinder and polisher is arranged, and the lower wheel disc is also provided with a lower annular clamp for fixing the lower grinder and polisher and a lower screw for fixing the lower annular clamp to the lower wheel disc; the upper grinder and polisher and the lower grinder and polisher are both sandpaper or polishing cloth.

[0012] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that the diameter of the sample disc is smaller than the diameters of the upper wheel disc and the lower wheel disc.

[0013] The above-mentioned device for grinding and polishing small-sized compression or impact specimens is characterized in that a cleaning component for flushing the sample plate is also provided on the frame-shaped bracket, and a wastewater recovery component for recovering the flushing wastewater is provided at the lower part of the frame-shaped bracket.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model provides a frame-shaped bracket and a support rod to facilitate the horizontal suspension of the sample tray, and symmetrically provides an upper grinding and polishing mechanism and a lower grinding and polishing mechanism with the same structure on the upper and lower sides of the sample tray, so as to realize automatic grinding and polishing of the upper and lower end faces or sides of the compression or impact sample clamped on the sample tray, saving time and labor, solving the problems of the compression or impact sample falling off and the grinding of fingers during manual grinding and polishing, and solving the problems of uneven surface and uneven grinding and polishing caused by manual grinding and polishing.

[0016] 2. In the utility model, the sample tray is customized according to the size of the compression or impact sample. Multiple samples can be placed in one sample tray, which greatly improves the efficiency of sample grinding and realizes the synchronous grinding and polishing of the sides of multiple cylindrical compression or impact samples. At the same time, the two end faces of the compression or impact sample can also be ground and polished at the same time, which improves the grinding and polishing efficiency of small-sized compression or impact samples.

[0017] 3. The utility model facilitates the control of the positions of the upper and lower grinding and polishing assemblies by arranging the upper lifting assembly and the lower lifting assembly, and is suitable for compression or impact specimens of different heights and diameters. At the same time, the pressure of the upper and lower grinding and polishing assemblies on the compression or impact specimens can be controlled by controlling the position, thereby ensuring the grinding and polishing effect and facilitating the installation and disassembly of the compression or impact specimens and the sample plate. By arranging the rotating assembly, it is convenient to drive the grinding and polishing assembly to rotate, thereby realizing grinding and polishing. In addition, the rotating assemblies of the upper and lower grinding and polishing mechanisms rotate in opposite directions, thereby improving the grinding and polishing efficiency, regulating the grinding and polishing speed, improving work efficiency, and reducing labor costs.

[0018] 4. When the utility model is used for grinding and polishing, it is only necessary to adjust the upper and lower grinders for automatic grinding and polishing, which saves time and effort and solves the problems of sample shedding and finger abrasion during manual grinding and polishing.

[0019] The technical solution of the utility model is further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the structure of a device for grinding and polishing small-sized compression or impact specimens.

[0021] Figure 2 The utility model is a schematic diagram of the structure of the upper grinding and polishing assembly of the device for grinding and polishing small-sized compression or impact specimens.

[0022] Figure 3 The utility model is a schematic diagram of the structure of a rectangular hole sample plate in the device for grinding and polishing small-sized compression or impact specimens.

[0023] Figure 4The utility model is a schematic diagram of the structure of a square hole sample plate in the device for grinding and polishing small-sized compression or impact specimens.

[0024] Figure 5 The utility model is a schematic diagram of the structure of a circular hole sample plate in the device for grinding and polishing small-sized compression or impact specimens.

[0025] Description of reference numerals:

[0026] 1—frame bracket; 2—support rod; 3—sample tray;

[0027] 3-1—rectangular hole sample plate; 3-2—rectangular hole; 3-3—square hole sample plate; 3-4—square hole; 3-5—circular hole sample plate; 3-6—circular hole;

[0028] 4—upper lifting assembly; 4-1—upper cylinder; 4-2—upper connecting rod;

[0029] 5—lower lifting assembly; 5-1—lower cylinder; 5-2—lower connecting rod;

[0030] 6—upper rotating assembly; 7—lower rotating assembly; 8—upper grinding and polishing assembly 8-1—upper wheel; 8-2—upper grinding and polishing device; 8-3—upper annular fixture; 8-4—upper screw; 9—lower grinding and polishing assembly; 10—cleaning assembly;

[0031] 11—Wastewater recovery component. DETAILED DESCRIPTION

[0032] like Figure 1 As shown, a device for grinding and polishing small-sized compression or impact specimens in this embodiment includes a frame-shaped bracket 1, a sample tray 3 is detachably connected to the middle part of the frame-shaped bracket 1 through a support rod 2, and an upper grinding and polishing mechanism and a lower grinding and polishing mechanism with the same structure are symmetrically arranged above and below the sample tray 3. The upper grinding and polishing mechanism includes an upper lifting assembly 4 connected to the frame-shaped bracket 1, an upper rotating assembly 6 is connected to the upper lifting assembly 4, and the upper rotating assembly 6 is detachably connected to the upper grinding and polishing assembly 8, and the lower grinding and polishing mechanism is correspondingly provided with a lower lifting assembly 5, a lower rotating assembly 7 and a lower grinding and polishing assembly 9.

[0033] It should be noted that, by providing the frame-shaped bracket 1 and the support rod 2, it is convenient to suspend the sample tray 3 horizontally, and the upper and lower grinding and polishing mechanisms and the lower grinding and polishing mechanisms with the same structure are symmetrically provided on the upper and lower sides of the sample tray 3, so as to realize automatic grinding and polishing of the upper and lower end faces or sides of the compression or impact sample clamped on the sample tray 3, thereby saving time and labor, solving the problems of falling off of the compression or impact sample and abrasion of fingers during manual grinding and polishing, and solving the problems of uneven surface and uneven grinding and polishing caused by manual grinding and polishing.

[0034] It should be noted that by setting the upper lifting assembly 4 and the lower lifting assembly 5, it is convenient to control the position of the upper grinding and polishing assembly 8 and the lower grinding and polishing assembly 9, which is suitable for compression or impact samples of different heights and diameters. At the same time, the pressure of the upper grinding and polishing assembly 8 and the lower grinding and polishing assembly 9 on the compression or impact sample can be controlled by controlling the position, thereby ensuring the grinding and polishing effect and facilitating the installation and disassembly of the compression or impact sample and the sample disk 3. By setting the rotating assembly, it is convenient to drive the grinding and polishing assembly to rotate, thereby realizing grinding and polishing. In addition, the rotating assemblies of the upper grinding and polishing mechanism and the lower grinding and polishing mechanism rotate in opposite directions, thereby improving the grinding and polishing efficiency.

[0035] It should be noted that when the compression or impact sample is installed on the sample tray 3 , the lower grinding and polishing assembly 9 in the lower grinding and polishing mechanism is first raised to support the compression or impact sample to prevent the compression or impact sample from falling from the sample tray 3 .

[0036] like Figure 3 to Figure 5 As shown, in this embodiment, the sample disk 3 includes a rectangular hole sample disk 3-1 with a plurality of rectangular holes 3-2 arranged circumferentially with the center of the sample disk 3 as the center, a square hole sample disk 3-3 with a plurality of square holes 3-4 arranged circumferentially with the center of the sample disk 3 as the center, and a circular hole sample disk 3-5 with a plurality of circular holes 3-6 arranged circumferentially with the center of the sample disk 3 as the center. By arranging holes with different shapes, it is suitable for compression or impact specimens of various shapes, and each sample disk 3 is provided with a plurality of holes to improve the efficiency of grinding and polishing.

[0037] It should be noted that the compression or impact specimen is usually cylindrical. When a circular hole sample disk 3-5 is used, the cylindrical compression or impact specimen is inserted vertically and both ends are polished. When the height and diameter of the cylindrical compression or impact specimen are the same, the cylindrical compression or impact specimen is placed horizontally in the square hole sample disk 3-3, and the side of the cylindrical compression or impact specimen is polished. When the height and diameter of the cylindrical compression or impact specimen are different, a rectangular hole sample disk 3-1 is used to polish the side of the cylindrical compression or impact specimen.

[0038] In this embodiment, the thickness of the sample disk 3 is less than the height of the compression or impact sample, and the thickness of the sample disk 3 is less than the diameter and height of the compression or impact sample. By controlling the thickness of the sample disk 3, it is ensured that both the side and end faces of the compression or impact sample can be ground and polished.

[0039] In this embodiment, the sample plate 3 and the upper polishing mechanism and the lower polishing mechanism are coaxial. By ensuring that the sample plate 3 and the upper polishing mechanism and the lower polishing mechanism are coaxial, the uniformity of polishing is ensured.

[0040] like Figure 1As shown, in this embodiment, the upper lifting assembly 4 includes an upper cylinder 4-1 connected to the frame-shaped bracket 1 and an upper connecting rod 4-2 connected to the upper cylinder 4-1, and the upper connecting rod 4-2 is connected to the upper rotating assembly 6. The lower lifting assembly 5 includes a lower cylinder 5-1 connected to the frame-shaped bracket 1 and a lower connecting rod 5-2 connected to the lower cylinder 5-1, and the lower connecting rod 5-2 is connected to the lower rotating assembly 7. The upper rotating assembly 6 and the upper polishing assembly 8 are moved up and down by the upper cylinder 4-1 and the upper connecting rod 4-2, and the lower rotating assembly 7 and the lower polishing assembly 9 are moved up and down by the lower cylinder 5-1 and the lower connecting rod 5-2, which is convenient for installing compression or impact specimens.

[0041] like Figure 1 As shown, in this embodiment, the upper rotating assembly 6 is an upper rotating motor, and the output shaft of the upper rotating motor is connected to the center of the upper grinding and polishing assembly 8, and the lower rotating assembly 7 is a lower rotating motor, and the output shaft of the lower rotating motor is connected to the center of the lower grinding and polishing assembly 9. By connecting the output shaft of the upper rotating motor to the center of the upper grinding and polishing assembly 8, the upper grinding and polishing assembly 8 can rotate automatically and uniformly around its center, and by connecting the output shaft of the lower rotating motor to the center of the lower grinding and polishing assembly 9, the lower grinding and polishing assembly 9 can rotate automatically and uniformly around its center, thereby avoiding the uneven force application during manual grinding and polishing and the uneven grinding and polishing caused by the difference in the holding position of the compression or impact sample, and controlling the rotation speed of the upper rotating motor and the lower rotating motor to be the same and the rotation direction to be opposite, thereby improving the grinding and polishing efficiency.

[0042] like Figure 2 As shown, in this embodiment, the upper grinding and polishing assembly 8 includes an upper wheel disc 8-1, on which an upper grinder and polisher 8-2 is arranged, and the upper wheel disc 8-1 is also provided with an upper annular clamp 8-3 for fixing the upper grinder and polisher 8-2 and an upper screw 8-4 for fixing the upper annular clamp 8-3 to the upper wheel disc 8-1, and the lower grinding and polishing assembly 9 includes a lower wheel disc, under which a lower grinder and polisher is arranged, and the lower wheel disc is also provided with a lower annular clamp for fixing the lower grinder and polisher and a lower screw for fixing the lower annular clamp to the lower wheel disc, and the upper grinder and polisher 8-2 and the lower grinder and polisher are both sandpaper or polishing cloth. The upper grinder and polisher 8-2 is supported by the upper wheel disc 8-1, and the upper grinder and polisher 8-2 is fixed to the lower surface of the upper wheel disc 8-1 by the upper annular clamp 8-3 and the upper screw 8-4, so that the upper part of the compressed or impacted sample in the sample disc 3 can be polished. The lower grinder and polisher is supported by the lower wheel disc, and the lower grinder and polisher is fixed to the upper surface of the lower wheel disc by the lower annular clamp and the lower screw, so that the lower part of the compressed or impacted sample in the sample disc 3 can be polished, and the upper grinder and polisher 8-2 and the lower grinder and polisher can be replaced at the same time to realize grinding and polishing respectively.

[0043] In this embodiment, the diameter of the sample disk 3 is smaller than the diameters of the upper disk 8-1 and the lower disk. By controlling the diameter of the sample disk 3 to be smaller than the diameters of the upper disk 8-1 and the lower disk, it is ensured that all compression or impact samples in the sample disk 3 can be completely ground and polished.

[0044] like Figure 1 As shown, in this embodiment, a cleaning component 10 for flushing the sample tray 3 is also provided on the frame bracket 1, and a wastewater recovery component 11 for recovering the flushing wastewater is provided at the lower part of the frame bracket 1. The cleaning component 10 is a sprayer connected to a water supply pipe, and the sprayer is provided with a spray port with adjustable water pressure. Water is sprayed to the sample tray 3 through the cleaning component 10 to clean the grinding debris generated during the grinding and polishing process, and to cool down the compressed or impacted sample in time to reduce the damage to the compressed or impacted sample and the grinder and polisher. The wastewater after flushing is recovered and processed by setting the wastewater recovery component 11. The wastewater recovery component is a wastewater collection tank, and a filter screen is set in the tank to filter the grinding. The bottom is connected to a drain pipe to discharge the wastewater.

[0045] The actual use method of the device for grinding and polishing small-sized compression or impact specimens of the utility model is described in detail through Examples 1 to 3.

[0046] Example 1

[0047] A rectangular hole sample disk 3-1 is installed on the support rod 2. The diameter of the rectangular hole sample disk 3-1 is 20 mm, the thickness is 3.5 mm, the width of the rectangular hole 3-2 is 4.1 mm, and the length is 7.2 mm. 220# sandpaper is fixed on the upper wheel disk 8-1 and the lower wheel disk respectively. The diameter of the wheel disk is 25 mm. The lower grinding and polishing assembly 9 of the lower grinding and polishing mechanism is raised. The TaW12 alloy compression sample of 4 mm×7 mm diameter×height and the HfNbTaTiZr refractory high entropy alloy compression sample are placed horizontally in the rectangular hole sample disk 3-1. The upper grinding and polishing assembly 8 of the upper grinding and polishing mechanism is moved downward so that The compressed sample is clamped between the lower grinding and polishing assembly 9 and the upper grinding and polishing assembly 8. The upper rotating assembly 6 is started to drive the upper grinding and polishing assembly 8 to rotate clockwise. At the same time, the lower rotating assembly 7 is started to drive the lower grinding and polishing assembly 9 to rotate counterclockwise to grind and polish the side of the compressed sample. During the grinding and polishing, the cleaning assembly 10 is used to rinse the grinding chips and cool the compressed sample. The waste water is recovered by the waste water recovery assembly 11. Then, 400#, 800#, 1000#, 2000# and 3000# sandpapers are fixed on the upper wheel disc 8-1 and the lower wheel disc respectively for grinding and polishing. Finally, the polishing cloth is used for grinding and polishing to complete the grinding and polishing of the compressed sample.

[0048] Example 2

[0049] A square hole sample disk 3-3 is installed on the support rod 2. The diameter of the square hole sample disk 3-3 is 20 mm, the thickness is 2.5 mm, and the side length of the square hole 3-4 is 3.1 mm. 220# sandpaper is fixed on the upper wheel disk 8-1 and the lower wheel disk respectively. The diameter of the wheel disk is 25 mm. The lower grinding and polishing assembly 9 of the lower grinding and polishing mechanism is raised. The TaW12 alloy Hopkinson impact specimen with a diameter of 3 mm × 3 mm × height and the HfNbTaTiZr refractory high entropy alloy Hopkinson impact specimen are horizontally placed in the square hole sample disk 3-3. The upper grinding and polishing assembly 8 of the upper grinding and polishing mechanism is moved downward so that the impact The impact sample is clamped between the lower grinding and polishing component 9 and the upper grinding and polishing component 8, the upper rotating component 6 is started to drive the upper grinding and polishing component 8 to rotate clockwise, and the lower rotating component 7 is started to drive the lower grinding and polishing component 9 to rotate counterclockwise, and the side of the impact sample is ground and polished. During the grinding and polishing, the cleaning component 10 is used to rinse the grinding chips and cool the impact sample, and the waste water is recovered by the waste water recovery component 11. Then, 400#, 800#, 1000#, 2000# and 3000# sandpapers are fixed on the upper wheel disc 8-1 and the lower wheel disc respectively for grinding and polishing, and finally polishing is performed with a polishing cloth to complete the grinding and polishing of the impact sample.

[0050] Example 3

[0051] A circular hole sample disk 3-5 is installed on the support rod 2. The diameter of the circular hole sample disk 3 is 20 mm and the thickness is 2.8 mm. The diameter of the circular hole 3-6 is 3.1 mm. 220# sandpaper is fixed on the upper wheel disc 8-1 and the lower wheel disc respectively. The diameter of the wheel disc is 25 mm. The lower grinding and polishing assembly 9 of the lower grinding and polishing mechanism is raised. The TaW12 alloy Hopkinson impact specimen with a diameter of 3 mm × 3 mm × height and the HfNbTaTiZr refractory high entropy alloy Hopkinson impact specimen are placed vertically in the circular hole sample disk 3-5. The upper grinding and polishing assembly 8 of the upper grinding and polishing mechanism is moved downward so that the impact specimen clamp Between the lower grinding and polishing assembly 9 and the upper grinding and polishing assembly 8, the upper rotating assembly 6 is started to drive the upper grinding and polishing assembly 8 to rotate clockwise, and the lower rotating assembly 7 is started to drive the lower grinding and polishing assembly 9 to rotate counterclockwise, and the upper and lower end surfaces of the impact sample are ground and polished. During the grinding and polishing, the cleaning assembly 10 is used to rinse the grinding chips and cool the impact sample, and the waste water recovery assembly 11 is used to recover the waste water. Then, 400#, 800#, 1000#, 2000# and 3000# sandpapers are fixed on the upper wheel disc 8-1 and the lower wheel disc respectively for grinding and polishing, and finally, polishing cloth is used for grinding and polishing to complete the grinding and polishing of the impact sample.

[0052] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the utility model still falls within the protection scope of the technical solution of the utility model.

Claims

1. A device for grinding and polishing small-sized compression or impact specimens, characterized in that: The device comprises a frame-shaped support (1), a sample tray (3) is detachably connected to the middle part of the frame-shaped support (1) via a support rod (2), an upper grinding and polishing mechanism and a lower grinding and polishing mechanism having the same structure are symmetrically arranged above and below the sample tray (3), the upper grinding and polishing mechanism comprises an upper lifting component (4) connected to the frame-shaped support (1), an upper rotating component (6) is connected to the upper lifting component (4), the upper rotating component (6) is detachably connected to the upper grinding and polishing component (8), and the lower grinding and polishing mechanism is correspondingly provided with a lower lifting component (5), a lower rotating component (7) and a lower grinding and polishing component (9).

2. A device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: The sample plate (3) comprises a rectangular hole sample plate (3-1) with a plurality of rectangular holes (3-2) arranged in a circumferential direction with the center of the sample plate (3) as the center of the circle, a square hole sample plate (3-3) with a plurality of square holes (3-4) arranged in a circumferential direction with the center of the sample plate (3) as the center of the circle, and a circular hole sample plate (3-5) with a plurality of circular holes (3-6) arranged in a circumferential direction with the center of the sample plate (3) as the center of the circle.

3. The device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: The thickness of the sample disc (3) is smaller than the height of the compression or impact sample, and the thickness of the sample disc (3) is smaller than the diameter and height of the compression or impact sample.

4. A device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: The sample plate (3) and the upper grinding and polishing mechanism and the lower grinding and polishing mechanism are coaxial.

5. The device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: The upper lifting assembly (4) comprises an upper cylinder (4-1) connected to the frame-shaped support (1) and an upper connecting rod (4-2) connected to the upper cylinder (4-1), and the upper connecting rod (4-2) is connected to the upper rotating assembly (6). The lower lifting assembly (5) comprises a lower cylinder (5-1) connected to the frame-shaped support (1) and a lower connecting rod (5-2) connected to the lower cylinder (5-1), and the lower connecting rod (5-2) is connected to the lower rotating assembly (7).

6. The device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: The upper rotating assembly (6) is an upper rotating motor, the output shaft of which is connected to the center of the upper grinding and polishing assembly (8), and the lower rotating assembly (7) is a lower rotating motor, the output shaft of which is connected to the center of the lower grinding and polishing assembly (9).

7. The device for grinding and polishing small-sized compression or impact specimens according to claim 1, characterized in that: The upper grinding and polishing assembly (8) comprises an upper wheel disc (8-1), an upper grinding and polishing device (8-2) is arranged on the upper wheel disc (8-1), and the upper wheel disc (8-1) is also provided with an upper annular clamp (8-3) for fixing the upper grinding and polishing device (8-2) and an upper screw (8-4) for fixing the upper annular clamp (8-3) and the upper wheel disc (8-1); the lower grinding and polishing assembly (9) comprises a lower wheel disc, a lower grinding and polishing device is arranged under the lower wheel disc, and the lower wheel disc is also provided with a lower annular clamp for fixing the lower grinding and polishing device and a lower screw for fixing the lower annular clamp and the lower wheel disc; the upper grinding and polishing device (8-2) and the lower grinding and polishing device are both sandpaper or polishing cloth.

8. A device for grinding and polishing small-sized compression or impact specimens according to claim 7, characterized in that: The diameter of the sample disc (3) is smaller than the diameters of the upper wheel disc (8-1) and the lower wheel disc.

9. The device for grinding and polishing small-size compression or impact specimens according to claim 1, characterized in that: A cleaning component (10) for flushing the sample tray (3) is also provided on the frame-shaped support (1), and a wastewater recovery component (11) for recovering flushing wastewater is provided at the lower part of the frame-shaped support (1).

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