A sample preparation polishing tool for improving the flatness of a spectral sample block surface

Abstract

This invention discloses a sample preparation and grinding fixture for improving the surface flatness of spectral sample blocks, relating to the field of spectral sample block preparation technology. It includes a base, with a bracket fixedly installed on the top of one side of the base, and a protective cover with an open bottom fixedly installed on the bracket. The beneficial effects of this invention are as follows: After the sample block to be ground is clamped by the clamping head, the servo motor drives the lead screw to rotate, which in turn drives the sleeve block and mounting seat downwards through the thread on the outside of the lead screw. This causes the clamped sample block to move downwards and contact the grinding surface of the grinding disc. After the sample block abuts against the grinding disc, the mounting seat continues to move downwards and compresses the first spring through the abutment plate. During subsequent grinding, the elastic force of the first spring pushes the abutment plate to keep the sample block firmly against the grinding disc. As grinding progresses, the sample block is continuously ground, ensuring the uniformity and safety of the grinding process. No manual hand-held grinding or manual clamping is required, making the process more convenient and faster.

Description

Technical Field

[0001] This invention relates to the field of spectral sample preparation technology, specifically to a sample preparation and polishing tool for improving the surface flatness of spectral samples. Background Technology

[0002] In the shipbuilding industry, spectral analysis places high demands on sample quality. Spectral analysis requires strict technical standards for the surface quality of the sample's detection surface: the surface must be flat, with clear and consistent textures, free of cross-hatching, contamination, and oxide layers. The flatness of the detection surface directly affects the coupling effect between the excitation source and the sample surface. Uneven surfaces can lead to diffuse discharge and incomplete excitation, affecting the accuracy and precision of the analytical results.

[0003] Currently, most existing spectral sample preparation methods involve manually grinding the sample block on a high-speed rotating grinding wheel. This method poses significant safety risks – due to the varying thickness of the samples, accidents such as slipping or even hand abrasions are very likely to occur during high-speed operation. Meanwhile, manual pressing makes it difficult to ensure the parallelism between the sample detection surface and the grinding wheel surface, resulting in an uneven grinding surface. Uneven pressing force can also cause micro-movements in the sample during grinding, leading to incomplete surface grinding and susceptibility to mechanical damage, affecting the accuracy of spectral analysis and personnel safety, thus presenting certain shortcomings. Some laboratories use gear and rack clamping fixtures to replace manual gripping, which improves safety, but the parallelism between the sample detection surface and the grinding surface is poor after clamping. During grinding, manual pressing is still required, and uneven distribution of clamping force still occurs, causing the sample to tilt during grinding. The ground surface has an angle that cannot meet the testing requirements, resulting in repeated rework and low efficiency, thus presenting certain shortcomings. Finally, existing spectral sample grinding generates a large amount of grinding debris, and existing grinding fixtures lack a structure for collecting the debris, which can easily cause the debris to fly and affect the surrounding environment, thus presenting certain shortcomings. Therefore, we propose a sample preparation and grinding fixture to improve the surface flatness of spectral samples. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sample preparation and polishing fixture for improving the surface flatness of spectral samples, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sample preparation and polishing fixture for improving the surface smoothness of spectral sample blocks, comprising: The base has a bracket fixedly installed on the top of one side, and a protective cover with an open bottom is fixedly installed on the bracket. The protective cover has a grinding hole, and a grinding machine is fixedly installed in the middle of the top of the protective cover. The output shaft of the grinding machine is detachably equipped with a grinding disc for grinding the spectral sample block. A support plate is fixedly installed on the top of the other side of the base. A first sliding groove is opened through the support plate. A lead screw is fixedly installed in the middle of the inner side of the first sliding groove. A servo motor is fixedly installed on the top of the support plate. The output shaft of the servo motor is fixedly connected to one end of the lead screw. A sleeve block is threaded on the outer side of the lead screw. Mounting base, the mounting base is fixedly installed on one side of the sleeve block, a concave frame is fixedly installed on the top of one end of the mounting base, a slide rod is slidably installed through the mounting base, and the slide rod passes through the concave frame and is slidably connected to it, and a clamping head for clamping the spectral sample block is provided at one end of the slide rod; A stop plate is fixedly installed on the outer side of the middle part of the slide rod, and a first spring is provided on the outer side of the slide rod to cooperate with the stop plate and the concave frame.

[0006] Furthermore, the top of the abutment is provided with two abutments, and the abutment passes through the top of the concave frame and is slidably connected thereto; One of the outer sides is provided with a height mark, and the inner side of the concave frame is provided with a reading rod that cooperates with the height mark.

[0007] Furthermore, a second sliding groove is provided inside one end of the sliding rod, a threaded rod is rotatably installed in the middle of the second sliding groove, a threaded sleeve is threadedly installed on the outer side of the threaded rod, a connecting plate is evenly and movably installed around the threaded sleeve, and a side through groove that mates with the connecting plate is opened around the second sliding groove. The clamping head is evenly provided with third sliding grooves, and two guide rods are fixedly installed on the inner side of several third sliding grooves. An installation block is slidably installed on the outer side of the guide rods. A clamping rod is fixedly installed on the bottom of the installation block. One end of the connecting plate is hinged to the top of the installation block.

[0008] Furthermore, a throttle is fixedly installed on the outer side of the top of the slide rod at one end of the threaded rod, and a locking disc is fixedly installed on the top of the slide rod. The locking disc has evenly spaced holes in a circular pattern, and a pin that mates with the holes is slidably installed through the throttle.

[0009] Furthermore, a push plate is fixedly installed on the outer side of the pin, and a second spring that cooperates with the push plate is provided on the outer side of the pin.

[0010] Furthermore, the base is provided with a negative pressure box with one side open. A spring hose is provided at the input end of the top of the negative pressure box. A collection cover is provided at one end of the spring hose. The collection cover is threadedly connected to the protective cover. A collection box is movably inserted into the inside of the opening of the negative pressure box. A negative pressure pump is fixedly installed on one side of the negative pressure box. The negative pressure end of the negative pressure pump extends into the interior of the negative pressure box.

[0011] Furthermore, a sealing cover is provided on one side of the collection box to cooperate with the opening of the negative pressure box, and a push-pull handle is provided on the sealing cover.

[0012] Furthermore, the negative pressure end of the negative pressure pump extends into the interior of the negative pressure box and is provided with a detachable filter end.

[0013] Furthermore, two limiting rods are fixedly installed on the inner side of the first groove, and the limiting rods pass through the sleeve block and are slidably connected to it.

[0014] Furthermore, a controller is provided on the bracket.

[0015] This invention provides a sample preparation and polishing fixture for improving the surface smoothness of spectral samples, which has the following beneficial effects: 1. This sample preparation and grinding fixture for improving the surface flatness of spectral samples, through the arrangement of a lead screw, servo motor, sleeve block, mounting base, concave frame, slide rod, clamping head, abutment plate, and first spring, allows the sample to be ground to be clamped by the clamping head. After the servo motor is turned on, the lead screw is rotated, and the sleeve block and mounting base are moved down through the thread on the outside of the lead screw. This causes the clamped sample to move down and contact the grinding surface of the grinding disc. After the sample abuts against the grinding disc, the mounting base continues to move down and compresses the first spring through the abutment plate. During subsequent grinding, the elasticity of the first spring pushes the abutment plate to keep the sample in close contact with the grinding disc. As grinding progresses, the sample is continuously ground, thus ensuring the uniformity and safety of grinding. It eliminates the need for manual hand-grinding and manual clamping, making the process more convenient and faster.

[0016] 2. This sample preparation and grinding fixture for improving the surface flatness of spectral samples, through the setting of height markers and reading rods, allows for precise control of the distance the plate is pressed against the grinding disc when the sample is clamped and the height of the mounting base is adjusted so that the sample is against the grinding disc. According to the required grinding thickness, the plate moves upward to compress the first spring. By observing the reading rod and height markers, the distance the plate is pressed upward can be accurately controlled, ensuring the accuracy of the grinding thickness. This eliminates the need for rework and improves grinding efficiency.

[0017] 3. This sample preparation and grinding fixture for improving the surface flatness of spectral samples, through the arrangement of threaded rods, threaded sleeves, connecting plates, side through grooves, guide rods, mounting blocks, and clamping rods, allows for easy clamping and fixing of the sample. Simply place the sample in the middle of several clamping rods at the bottom of the clamping head, rotate the threaded rod to move the threaded sleeve upwards via the outer thread, and then the connecting plate pulls the mounting block to slide outside the guide rod. This allows the four clamping rods to move from around the clamping head towards the center, thus clamping and fixing the sample to the bottom of the clamping head from all sides. This makes clamping more convenient and faster, and offers high compatibility, suitable for clamping and fixing sample blocks of various sizes and shapes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a side view of the support plate of the present invention; Figure 4 This is a schematic diagram of the polishing mechanism of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the protective cover of the present invention; Figure 6 This is a schematic diagram of the structure on the mounting base of the present invention; Figure 7 This is a schematic diagram of the bottom structure of the clamping head of the present invention; Figure 8 This is a partial structural cross-sectional view of the present invention; Figure 9 for Figure 8 Enlarged view of point A in the image; Figure 10 for Figure 8 Enlarged view of point B in the image; Figure 11 This is a schematic diagram of the negative pressure box structure of the present invention.

[0019] In the diagram: 1. Base; 2. Bracket; 3. Protective cover; 4. Grinding port; 5. Grinding machine; 6. Grinding disc; 7. Support plate; 8. First slide groove; 9. Lead screw; 10. Servo motor; 11. Sleeve block; 12. Mounting base; 13. Concave frame; 14. Slide rod; 15. Clamping head; 16. Support plate; 17. First spring; 18. Guide rod; 19. Height indicator; 20. Reading rod; 21. Second slide groove; 22. Threaded rod; 23. Threaded sleeve; 24. Connecting plate; 25. Side through groove; 26. Third slide groove; 27. Guide rod; 28. Mounting block; 29. ​​Clamping rod; 30. Turning handle; 31. Locking disc; 32. Insertion hole; 33. Pin; 34. Push plate; 35. Second spring; 36. Negative pressure box; 37. Spring hose; 38. Collection cover; 39. Collection box; 40. Negative pressure pump. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Please see Figures 1 to 11 This invention provides a technical solution: a sample preparation and polishing fixture for improving the surface smoothness of spectral sample blocks, comprising: A base 1 has a bracket 2 fixedly installed on the top of one side of the base 1. A protective cover 3 with an open bottom is fixedly installed on the bracket 2. A grinding hole 4 is provided on the protective cover 3. A grinding machine 5 is fixedly installed in the middle of the top of the protective cover 3. A grinding disc 6 for grinding spectral sample blocks is detachably installed on the output shaft of the grinding machine 5. When polishing the sample, the polishing disc 6 is rotated by turning on the polishing machine 5, thereby polishing the sample. Specifically, the output shaft of the polishing machine 5 drives the polishing disc 6 to rotate at high speed clockwise or counterclockwise. The abrasive layer on the lower surface of the polishing disc 6 and the sample surface to be polished are relatively slidable and cut, gradually removing the oxide layer, processing marks or unevenness from the sample surface, and finally obtaining a smooth surface that meets the requirements of spectral analysis. Support plate 7 is fixedly installed on the top of the other side of base 1. A first sliding groove 8 is opened through the support plate 7. A lead screw 9 is fixedly installed in the middle of the inner side of the first sliding groove 8. A servo motor 10 is fixedly installed on the top of the support plate 7. The output shaft of the servo motor 10 is fixedly connected to one end of the lead screw 9. A sleeve block 11 is threaded on the outer side of the lead screw 9. Mounting base 12 is fixedly installed on one side of sleeve block 11. A concave frame 13 is fixedly installed on the top of one end of mounting base 12. A slide rod 14 is slidably installed through and on mounting base 12, and the slide rod 14 passes through the concave frame 13 and is slidably connected to it. A clamping head 15 for clamping the spectral sample block is provided at one end of the slide rod 14. A stop plate 16 is fixedly installed on the outer side of the middle part of the slide rod 14, and a first spring 17 that cooperates with the stop plate 16 and the concave frame 13 is provided on the outer side of the slide rod 14; When the sample block is being polished, after the sample block is clamped and fixed by the clamping mechanism in the clamping head 15, the servo motor 10 is turned on to drive the lead screw 9 to rotate. The thread on the outside of the lead screw 9 drives the sleeve block 11 to move downward, thereby driving the mounting base 12 and the clamped sample block to move downward through the sleeve block 11, so that the sample block moves down from the polishing hole 4 and abuts against the polishing surface of the polishing disc 6. As the mounting base 12 continues to move downward, the slide rod 14 slides upward within the mounting base 12 and the concave frame 13, while the abutment plate 16 compresses the first spring 17. The elastic force of the first spring 17 acts on the abutment plate 16, converting the elastic force into a downward pressing force. This pressing force is transmitted to the sample block on the clamping head 15 through the slide rod 14. As the sample is polished and the material is gradually removed, the sample thickness decreases. The first spring 17 automatically extends and pushes the abutment plate 16 so that the surface of the sample to be polished is always pressed against the polishing disc 6 with a constant pressure. This allows for progressive polishing without the need for manual hand-held polishing, improving the safety of polishing. At the same time, due to the continuous and stable spring force, the contact pressure between the sample and the polishing disc 6 remains constant, and the polishing removal rate is uniform, meeting the requirements of spectral analysis for the sample surface.

[0022] The top of the abutment 16 is provided with two 18s, and the 18s pass through the top of the concave frame 13 and are slidably connected to it; A height mark 19 is provided on the outer side of an 18, and a reading rod 20 that cooperates with the height mark 19 is provided on the inner side of the concave frame 13; The setting 18 guides the slide bar 14 and the abutment plate 16, ensuring that the slide bar 14 does not deflect around its axis or radially offset during sliding, thus ensuring the stability of the sample block as it moves downwards and preventing relative sliding or uneven wear between the sample block and the grinding disc 6. Simultaneously, when the abutment plate 16 moves downwards with the mounting base 12 and the sample block abuts against the grinding disc 6, the distance the abutment plate 16 has moved upwards from the mounting base 12 can be observed through the height indicator 19 on the reading rod 20. This allows for accurate control of the grinding thickness of the sample block, improving the precision and accuracy of the grinding and facilitating subsequent inspection. For example, if the operator sets a target grinding thickness of 0.5mm, the mounting base 12 can be controlled to continuously move downwards until the height indicator 19 on the reading rod 20 shows a change of 0.5mm, at which point the servo motor 10 stops, thus precisely controlling the final sample block thickness and avoiding over-grinding or under-grinding problems caused by visual errors in traditional grinding methods.

[0023] The slide bar 14 has a second slide groove 21 inside one end. A threaded rod 22 is rotatably installed in the middle of the second slide groove 21. A threaded sleeve 23 is threadedly installed on the outer side of the threaded rod 22. A connecting plate 24 is evenly installed around the threaded sleeve 23. A side through groove 25 that mates with the connecting plate 24 is opened around the second slide groove 21. The clamping head 15 is evenly provided with third sliding grooves 26. Two guide rods 27 are fixedly installed on the inner side of several third sliding grooves 26. An installation block 28 is slidably installed on the outer side of the guide rods 27. A clamping rod 29 is fixedly installed on the bottom of the installation block 28. One end of the connecting plate 24 is hinged to the top of the installation block 28. When it is necessary to clamp the sample block to the bottom of the clamping head 15, after placing the sample block in the middle of the four clamping rods 29 at the bottom of the clamping head 15, the threaded sleeve 23 is moved upward by rotating the threaded rod 22 through the thread on the outside of the threaded rod 22. The threaded sleeve 23 drives the connecting plate 24 to move upward, thereby causing the connecting plate 24 to pull the mounting block 28 to slide outside the guide rod 27. At the same time, when the four clamping rods 29 move towards the middle of the clamping head 15, the sample block can be clamped and fixed to the clamping head 15 by the clamping rods 29, which can be used for clamping sample blocks of various sizes.

[0024] One end of the threaded rod 22 extends to the outer side of the top of the slide rod 14 and is fixedly installed with a handle 30. A locking plate 31 is fixedly installed at the top of the slide rod 14. The locking plate 31 has evenly spaced holes 32 in a circular pattern. A pin 33 that mates with the holes 32 is slidably installed through the handle 30. The throttle 30 facilitates manual rotation of the threaded rod 22 to clamp the sample block. Once clamped and fixed, inserting the pin 33 into the insertion hole 32 fixes the throttle 30 and the threaded rod 22, while the locking plate 31 and the slide rod 14 remain stationary. The pin 33 passes through the throttle 30 and is inserted into the insertion hole 32 of the locking plate 31, thus limiting the rotational freedom of the throttle 30 relative to the slide rod 14. This prevents the clamping head 15 from vibrating when the sample block contacts the grinding plate 6 and the grinding plate 6 rotates to clamp and grind the sample block, which could cause the threaded rod 22 to rotate and affect the stability of clamping and fixing the sample block. This ensures that the clamping force remains constant during continuous grinding for several minutes, and the sample block will not loosen or shift.

[0025] A push plate 34 is fixedly installed on the outside of the pin 33, and a second spring 35 that cooperates with the push plate 34 is provided on the outside of the pin 33. With the push plate 34 and the second spring 35, the spring force of the second spring 35 acts on the push plate 34, ensuring that the pin 33 is always subjected to a downward pushing force. This allows the pin 33 to be stably inserted into the socket 32, preventing the pin 33 from dislodging from the socket 32. When it is necessary to rotate the handle 30, simply pull the push plate 34 upward to disengage the lower end of the pin 33 from the socket 32, allowing the handle 30 to rotate freely. After releasing, the second spring 35 automatically resets, pushing the pin 33 into the nearest socket 32, achieving quick self-locking and convenient operation.

[0026] A negative pressure box 36 with one side open is provided on the base 1. A spring hose 37 is provided at the input end of the top of the negative pressure box 36. A collection cover 38 is provided at one end of the spring hose 37. The collection cover 38 is threadedly connected to the protective cover 3. A collection box 39 is movably inserted into the inside of the opening of the negative pressure box 36. A negative pressure pump 40 is fixedly installed on one side of the negative pressure box 36. The negative pressure end of the negative pressure pump 40 extends into the inside of the negative pressure box 36. When grinding the sample block, the air in the negative pressure box 36 is extracted by turning on the negative pressure pump 40, and the negative pressure inside generates suction. This suction is generated by the spring hose 37, which in turn generates suction at the bottom of the collection cover 38 and the protective cover 3. The grinding debris generated during grinding is sucked into the negative pressure box 36 and collected by the collection box 39, thus preventing the grinding debris from splashing to the surrounding area or remaining on the base 1 and affecting environmental hygiene. By connecting the collection cover 38 to the protective cover 3 by threads, the collection cover 38 can be removed from the bottom of the protective cover 3 to replace the grinding disc 6.

[0027] A sealing cover is provided on one side of the collection box 39 to fit the opening of the negative pressure box 36, and a push-pull handle is provided on the sealing cover; The sealing cover on one side of the collection box 39 effectively seals the opening of the negative pressure box 36, preventing outside air from entering the negative pressure box 36 through the opening when the negative pressure box 36 is under negative pressure, thus affecting the negative pressure effect. This ensures that the collection cover 38 has sufficient negative pressure suction to efficiently collect grinding debris.

[0028] The negative pressure end of the negative pressure pump 40 extends into the interior of the negative pressure box 36 and is equipped with a removable filter end. By setting the filter end, the wear debris sucked into the negative pressure box 36 can be prevented from being sucked into the negative pressure pump 40 by the negative pressure end, which would cause internal wear and extend the service life of the negative pressure pump 40. At the same time, the filter end can be disassembled for cleaning or replacement regularly, ensuring filtration efficiency during long-term use.

[0029] Two limiting rods are fixedly installed on the inner side of the first slide groove 8. The limiting rods pass through the sleeve block 11 and are slidably connected to it. The setting of the limiting rod plays the role of limiting and guiding the sleeve 11. Since the sleeve 11 is threaded on the outside of the lead screw 9, when the lead screw 9 is driven to rotate, the sleeve 11 will not rotate with it and thus will not spin freely. Therefore, the sleeve 11 plays the role of limiting and guiding by sliding on the outside of the limiting rod, ensuring that the sleeve 11 can only move in a straight line in the vertical direction.

[0030] A controller is installed on bracket 2; The controller can be configured to control the overall operation of the equipment, including the start / stop and speed adjustment of the grinder 5, the forward / reverse rotation and speed control of the servo motor 10, and the start / stop of the negative pressure pump 40.

[0031] In summary, this sample preparation and grinding fixture for improving the surface flatness of spectral samples is used by placing the sample to be ground in the middle of the four clamping rods 29 at the bottom of the clamping head 15. After pulling the pin 33 upwards to pull it out of the insertion hole 32, rotating the pin 33 causes the threaded rod 22 to rotate. The threaded rod 22 then drives the threaded sleeve 23 to move upwards through the thread on the outside of the threaded rod 22. The threaded sleeve 23 drives the connecting plate 24 to move upwards, thereby causing the connecting plate 24 to pull the mounting block 28 to slide outside the guide rod 27. At the same time, when the four clamping rods 29 move towards the middle of the clamping head 15, the sample can be clamped and fixed at the bottom of the clamping head 15 by the clamping rods 29, thus completing the clamping and fixing of the sample. After the sample block is clamped and fixed, the second spring 35 rebounds and pushes the push plate 34 after the pin 33 is released, so that the push plate 34 drives the pin 33 to move down and insert it into the socket 32 ​​to lock the handle 30. Then, by turning on the servo motor 10, the lead screw 9 is driven to rotate. The thread on the outside of the lead screw 9 drives the sleeve block 11 to move down. In turn, the sleeve block 11 drives the mounting base 12 and the clamped sample block to move down, so that the sample block moves down from the grinding hole 4 and abuts against the grinding surface of the grinding disc 6. According to the required grinding thickness, as the mounting base 12 continues to move down, the slide rod 14 slides in the mounting base 12 and the concave frame 13. By observing the height mark 19 and the reading rod 20, the distance at which the abutment plate 16 is pushed up is controlled. At the same time, the abutment plate 16 is pressed against the first spring 17. Through the elastic force of the first spring 17 on the abutment plate 16, as the sample block is ground, the first spring 17 pushes the abutment plate 16 so that the surface of the sample block to be ground always abuts against the grinding disc 6. Then, after turning on the grinder 5 to drive the grinding disc 6 to rotate, the sample block can be ground by the grinding disc 6. When grinding the sample block, the negative pressure pump 40 is turned on to extract the air in the negative pressure box 36 and generate suction force inside it. This suction force is generated by the spring hose 37 to the bottom of the collection cover 38 and the protective cover 3, so that the grinding debris generated during grinding can be sucked into the negative pressure box 36 and collected by the collection box 39, so as to avoid the grinding debris from splashing to the surrounding area or remaining on the base 1 and affecting environmental hygiene.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks, characterized in that, include: A base (1) is fixedly mounted on the top of one side of the base (1), and a protective cover (3) with an open bottom is fixedly mounted on the support (2). A grinding hole (4) is opened on the protective cover (3), and a grinding machine (5) is fixedly mounted in the middle of the top of the protective cover (3). A grinding disc (6) for grinding spectral sample blocks is detachably mounted on the output shaft of the grinding machine (5). Support plate (7), the support plate (7) is fixedly installed on the top of the other side of the base (1), the support plate (7) has a first sliding groove (8) through it, a lead screw (9) is fixedly installed in the middle of the inner side of the first sliding groove (8), a servo motor (10) is fixedly installed on the top of the support plate (7), the output shaft of the servo motor (10) is fixedly connected to one end of the lead screw (9), and a sleeve block (11) is threaded on the outer side of the lead screw (9). Mounting base (12), the mounting base (12) is fixedly installed on one side of the sleeve block (11), a concave frame (13) is fixedly installed on the top of one end of the mounting base (12), a slide rod (14) is slidably installed through the mounting base (12), and the slide rod (14) passes through the concave frame (13) and is slidably connected to it, and a clamping head (15) for clamping the spectral sample block is provided at one end of the slide rod (14). A stop plate (16) is fixedly installed on the outer side of the middle part of the slide rod (14), and a first spring (17) is provided on the outer side of the slide rod (14) to cooperate with the stop plate (16) and the concave frame (13).

2. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 1, characterized in that: The top of the abutment (16) is provided with two (18), and the (18) passes through the top of the concave frame (13) and is slidably connected to it; A height marker (19) is provided on the outer side of one of the (18), and a reading rod (20) that cooperates with the height marker (19) is provided on the inner side of the concave frame (13).

3. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 1, characterized in that: The slide rod (14) has a second slide groove (21) inside one end. A threaded rod (22) is rotatably installed in the middle of the second slide groove (21). A threaded sleeve (23) is threaded on the outer side of the threaded rod (22). A connecting plate (24) is evenly installed around the threaded sleeve (23). A side through groove (25) that mates with the connecting plate (24) is opened around the second slide groove (21). The clamping head (15) is evenly provided with third sliding grooves (26), and two guide rods (27) are fixedly installed on the inner side of several third sliding grooves (26). An installation block (28) is slidably installed on the outer side of the guide rods (27). A clamping rod (29) is fixedly installed on the bottom of the installation block (28). One end of the connecting plate (24) is hinged to the top of the installation block (28).

4. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 3, characterized in that: One end of the threaded rod (22) extends to the outer side of the top of the slide rod (14) and a handle (30) is fixedly installed thereon. A locking disc (31) is fixedly installed at the top of the slide rod (14). The locking disc (31) has evenly spaced holes (32) in a circular pattern. A pin (33) that mates with the holes (32) is slidably installed through the handle (30).

5. The sample preparation and grinding fixture for improving the surface flatness of spectral sample blocks according to claim 4, characterized in that: A push plate (34) is fixedly installed on the outside of the pin (33), and a second spring (35) that cooperates with the push plate (34) is provided on the outside of the pin (33).

6. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 1, characterized in that: The base (1) is provided with a negative pressure box (36) with one side open. A spring hose (37) is provided at the input end of the top of the negative pressure box (36). A collection cover (38) is provided at one end of the spring hose (37). The collection cover (38) is threadedly connected to the protective cover (3). A collection box (39) is movably inserted into the inside of the opening of the negative pressure box (36). A negative pressure pump (40) is fixedly installed on one side of the negative pressure box (36). The negative pressure end of the negative pressure pump (40) extends into the inside of the negative pressure box (36).

7. The sample preparation and grinding fixture for improving the surface flatness of spectral sample blocks according to claim 6, characterized in that: The collection box (39) is provided with a sealing cover on one side that matches the opening of the negative pressure box (36), and the sealing cover is provided with a push-pull handle.

8. The sample preparation and grinding fixture for improving the surface flatness of spectral sample blocks according to claim 6, characterized in that: The negative pressure end of the negative pressure pump (40) extends into the interior of the negative pressure box (36) and is provided with a detachable filter end.

9. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 1, characterized in that: Two limiting rods are fixedly installed on the inner side of the first slide groove (8), and the limiting rods pass through the sleeve block (11) and are slidably connected to it.

10. The sample preparation and polishing fixture for improving the surface flatness of spectral sample blocks according to claim 1, characterized in that: A controller is provided on the bracket (2).

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