Grinding device for grinding small-diameter, tall samples, and usage method therefor

Abstract

A grinding device for grinding small-diameter, tall samples, and a usage method therefor. The grinding device comprises a base (1), wherein a work platform (2) is fixed to the top end of the base (1); support rods (4) are fixed to the top end of the work platform (2); a top plate (5) is fixed to the top ends of the support rods (4); and a fixing mechanism (6) is provided at the top end of the top plate (5). By means of the cooperation of positioning seats (301), positioning plates (302) and fixing knobs (303), the positioning plates (302) can be rotated to an angle to change the angle of centering cylinders (304), the fixing knobs (303) can lock the angle of the positioning plates (302), and three centering cylinders (304) can center small-diameter, tall samples after coming into contact with same. Moreover, a first electric motor (305) drives one positioning plate (302) to rotate, so that the movement of a belt (306) drives the other two positioning plates (302) to move at the same angle. In addition, by means of replacing the positioning plates (302) of different heights and the centering cylinders (304) of different heights, the device can be adapted to small-diameter, tall samples of various heights.

Description

A grinding device for small-diameter long high sample grinding and a method of using the same TECHNICAL FIELD

[0001] The present application belongs to the technical field of grinding devices, and particularly relates to a grinding device for small-diameter long high sample grinding and a method of using the same. BACKGROUND

[0002] In the metallurgical production process, in order to master the data parameters of the product, part of the metal sample needs to be taken for chemical analysis, and the surface of the metal sample needs to be polished before the chemical analysis. There is a small-diameter long high sample in the metal sample. When producing such a sample, a cutting machine or other tools are used to process the material. The cutting machine cannot cut the material too flat, which will cause the sample surface to have processing marks and defects. Since the sample is completed after production, it will be applied to mechanical property testing, heat treatment research and microstructure observation, etc. The processing marks and defects on the surface will affect the experimental data, so a machine that can grind the metal sample is needed to eliminate the processing marks and defects on the surface of the sample while grinding the small-diameter long high sample. The sample is taken for sample, and the sample data is marked and detected.

[0003] For example, the utility model discloses a kind of grinding device suitable for metal sample, including base, grinding mechanism, positioning mechanism, rotating mechanism, sample holding mechanism, controller, CPU and sample placing table;The base includes top plate, bottom plate and support rod;The four corners of the upper end surface of the bottom plate are vertically provided with support rod, and the top end of the support rod is provided with top plate;The grinding mechanism is arranged on the upper end surface of the bottom plate;The positioning mechanism, rotating mechanism, controller and sample placing table are all arranged on the upper end surface of the top plate;The sample holding mechanism is arranged on the rotating mechanism;The top plate is provided with fan-shaped through hole in vertical direction;The signal output end of the controller is connected with the signal input end of CPU.The utility model improves the grinding efficiency of metal sample.

[0004] The above-mentioned device can improve the grinding efficiency of metal sample by the cooperation between the grinding mechanism, positioning mechanism, rotating mechanism and other components during use, but the device cannot grind the small-diameter long high sample during use, and cannot fix the small-diameter long high sample, and only gravity cannot guarantee that the ground sample is completely collected. SUMMARY

[0005] To solve the problems raised in the above background art, the present application provides a grinding device for small-diameter long high sample grinding and a method of using the same.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a grinding device for small-diameter long high sample grinding and a using method thereof, comprising a base, a workbench fixed at the top end of the base, a supporting rod fixed at the top end of the workbench, a top plate fixed at the top end of the supporting rod, and a fixing mechanism arranged at the top end of the top plate;

[0007] The fixing mechanism comprises a second motor, an electric telescopic rod and a limiting groove, the second motor is fixed at the top end of the top plate, the electric telescopic rod is fixed at the bottom end of the second motor, the limiting groove is arranged at the bottom end of the electric telescopic rod, a limiting block is fixed in the limiting groove, a connecting knob is threadedly connected to the inner wall of the limiting groove, a limiting seat is arranged at the bottom end of the connecting knob, and a fixing nut is threadedly connected to the outer wall of the limiting seat.

[0008] Preferably, the electric telescopic rod is fixed at the output end of the second motor, a circular hole is arranged at the center of the connecting knob, the fixing nut is arranged with four groups of mounting portions arranged on the outer wall of the limiting seat, and the fixing nut is arranged at equal intervals about the central axis of the limiting seat.

[0009] Preferably, a grinding mechanism is arranged at the top end of the base, the grinding mechanism comprises a positioning seat, a positioning plate and a fixing knob, the positioning seat is fixed at the top end of the workbench, the positioning plate is rotatably connected to the inner wall of the positioning seat, a centering cylinder is arranged at one end of the positioning plate, and the fixing knob is arranged at the top end of the positioning plate.

[0010] Preferably, a first motor is fixed at the bottom end of the positioning plate, and a belt is sleeved on the outer wall of the positioning plate.

[0011] Preferably, the positioning seat is arranged with three groups of mounting portions arranged at equal intervals about the central axis of the workbench, the outer wall of the fixing knob is matched with the inner wall of the positioning seat, and the fixing knob and the positioning seat are threadedly connected.

[0012] Preferably, a sample collecting mechanism is arranged at the top end of the base, the sample collecting mechanism comprises a grinding table, a sample collecting groove and a guide hole, the grinding table is fixed at the top end of the workbench, the sample collecting groove is arranged at the top end of the grinding table, the guide hole is arranged at the bottom end of the grinding table, a third motor is fixed at the top end in the base, the third motor is fixed at the top end of a connecting rod, and a sample collecting fan is fixed at the top end of the connecting rod.

[0013] Preferably, the sample collecting groove is arranged with a plurality of groups of mounting portions arranged at equal intervals about the central axis of the grinding table, and the guide hole is arranged with four groups of mounting portions arranged at equal intervals about the central axis of the grinding table.

[0014] Preferably, the outer wall of the base is fixed with a control console, the top end of the control console is provided with control buttons, the top end of the control console is fixed with a signal indicator, the bottom end inside the base is provided with a sample collection box, and the outer wall of the base is rotationally connected with a cabinet door.

[0015] Preferably, the support rod is provided with four groups of equidistant distribution about the central axis of the workbench, the bottom end of the sample collection box is provided with a sliding groove, the bottom end inside the base is provided with a sliding block, and the sample collection box and the base are in sliding connection.

[0016] The application also provides a method for grinding a small-diameter long high sample, comprising the following steps:

[0017] S1, insert the limiting seat (606) of a suitable size into the inside of the connecting knob (605) through the fixing rod at the top, and then into the center of the limiting block (604), rotate the connecting knob (605), the connecting knob (605) can go up when rotating through the threads arranged on the outer wall and the threads arranged on the inner wall of the limiting groove (603), so that when the connecting knob (605) contacts the bottom of the limiting block (604) by the shape at the top, the shape of the limiting block (604) can be shrunk, and then the top of the limiting seat (606) contacts the limiting block (604), so that the position of the limiting seat (606) is fixed, after the small-diameter long high sample is placed in the limiting seat (606) of a suitable size, the position of the small-diameter long high sample is centered and fixed by rotating a plurality of fixing nuts (607), at this time the bottom end of the small-diameter long high sample contacts the positioning seat (301), and the second motor (601) is started to drive the electric telescopic rod (602) and the components below to rotate, so that the small-diameter long high sample can rotate;

[0018] S2, the positioning plate (302) is sleeved on the outer wall of the positioning seat (301) and can rotate, after the positioning plate (302) suitable for the height of the small-diameter long high sample is sleeved on the outer wall of the positioning seat (301), it is rotated to an angle adhering to the small-diameter long high sample, which can ensure that the small-diameter long high sample is fixed in the centering cylinder (304) contacting the small-diameter long high sample when rotating, the small-diameter long high sample is centered, and the fixed knob (303) is rotated, the fixed knob (303) is matched with the threads inside the positioning seat (301) through the threads of the fixed knob (303) itself, and can fix the angle of the positioning plate (302) when going down.

[0019] S3, by setting three sets of positioning plate (302), and in the outer wall of three sets of positioning plate (302) set up belt (306), start first motor (305), first motor (305) can drive a set of positioning plate (302) to rotate, so that the position of the belt (306) moves, in turn simultaneously drive the angle of three sets of positioning plate (302) changes, so that it can center the small diameter long high sample;

[0020] S4, the top of the grinding table (701) is provided with rough particles, so that the bottom end of the small diameter long high sample contacts the grinding table and grinds it, the sample can fall into the inside of the grinding table (701) by setting the sample collecting groove (702), and the sample is further collected into the inside of the sample collecting box (11) through the guide hole (703) opened at the bottom of the grinding table (701);

[0021] S5, start the third motor, the third motor drives the connecting rod to rotate, in turn drives the sample collecting fan to rotate, the sample collecting fan generates suction when rotating, so that the small diameter long high sample is sucked into the inside of the grinding table through the sample collecting groove when grinding the sample, and then falls into the inside of the sample collecting box through the guide hole;

[0022] S6, the control buttons and signal indicating lamps above the console can control the operation of the device, turn on the cabinet door after grinding and collecting the small diameter long high sample, slide out the sample collecting box, extract part of the ground sample, observe it through the laboratory microscope, and record the data.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] The present application is provided with positioning seat, positioning plate, fixed knob and other structures, which can center the small diameter long high sample, change the angle of the centering cylinder by rotating the angle of the positioning plate, fix the angle of the positioning plate with the fixed knob, center the small diameter long high sample with three sets of centering cylinders, improve the uniformity of grinding, improve the efficiency of grinding, and the rotation of a set of positioning plate driven by the first motor can move the belt to drive the other two sets of positioning plates to move at the same angle, so that the centering effect is better, and different height positioning plates and centering cylinders can be replaced to adapt to small diameter long high samples of various heights.

[0025] The second motor, the electric telescopic rod, the limiting groove and other structures are matched, so that the device can drive the electric telescopic rod and the lower assembly and the small-diameter long and high sample fixed on the assembly to rotate by starting the second motor, so that the small-diameter long and high sample can be ground when rotating and contacting the grinding table below, the limiting block, the connecting knob and the top end of the limiting seat are matched, different widths of the limiting seat can be quickly disassembled, different sizes of the small-diameter long and high sample can be matched, and the small-diameter long and high sample can be centered and fixed through the fixing nut.

[0026] The grinding table, the sample collecting groove, the guide hole and other structures are matched, so that the device can collect the sample into the inside of the sample collecting box through the sample collecting groove and the guide hole after grinding the small-diameter long and high sample, and the sample collecting fan can be driven to rotate by the third motor, so that the downward suction force is generated, the small-diameter long and high sample particles after grinding are quickly collected through the sample collecting groove and the guide hole, and the range and efficiency of sample collection are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a schematic view of the cabinet door in an expanded state according to the present application;

[0028] Fig. 2 is a schematic view of the overall structure according to the present application;

[0029] Fig. 3 is a schematic view of the grinding mechanism structure according to the present application;

[0030] Fig. 4 is a schematic view of the sample collecting mechanism structure according to the present application;

[0031] Fig. 5 is a schematic view of the fixing mechanism structure according to the present application;

[0032] Fig. 6 is a schematic view of the fixing mechanism explosion structure according to the present application;

[0033] Fig. 7 is a schematic view of the fixing mechanism explosion structure according to the present application;

[0034] Fig. 8 is a schematic view of the different size limiting assembly according to the present application.

[0035] In the figure: 1, base; 2, workbench; 3, grinding mechanism; 301, positioning seat; 302, positioning plate; 303, fixing knob; 304, centering cylinder; 305, first motor; 306, belt; 4, support rod; 5, top plate; 6, fixing mechanism; 601, second motor; 602, electric telescopic rod; 603, limiting groove; 604, limiting block; 605, connecting knob; 606, limiting seat; 607, fixing nut; 7, sample collecting mechanism; 701, grinding table; 702, sample collecting groove; 703, guide hole; 704, third motor; 705, connecting rod; 706, sample collecting fan; 8, control console; 9, control button; 10, signal indicator; 11, sample collecting box; 12, cabinet door. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] As shown in FIGS. 1-8, the present application provides a grinding device for small-diameter long and high sample grinding, which comprises a base 1, a workbench 2 fixed at the top end of the base 1, a support rod 4 fixed at the top end of the workbench 2, a top plate 5 fixed at the top end of the support rod 4, a fixing mechanism 6 provided at the top end of the top plate 5, a control console 8 fixed on the outer wall of the base 1, a control button 9 provided at the top end of the control console 8, a signal indicator lamp 10 fixed at the top end of the control console 8, a sample collection box 11 provided at the bottom end inside the base 1, a cabinet door 12 rotatably connected to the outer wall of the base 1, the support rod 4 being provided with four groups of equidistantly distributed about the central axis of the workbench 2, the bottom end of the sample collection box 11 being provided with a sliding groove, the bottom end inside the base 1 being provided with a sliding block, and the sample collection box 11 and the base 1 being slidingly connected.

[0038] By using the above scheme, the control button 9 and the signal indicator lamp 10 above the control console 8 can control the operation of the device, including running, closing and observation. After grinding and collecting the small-diameter long and high sample, the cabinet door 12 is opened, the sample collection box 11 is slid out, part of the ground sample is extracted, and the sample is observed by a laboratory microscope and the data is recorded.

[0039] As shown in FIGS. 1-8, the fixing mechanism 6 comprises a second motor 601, an electric telescopic rod 602 and a limiting groove 603, the second motor 601 is fixed at the top end of the top plate 5, the electric telescopic rod 602 is fixed at the bottom end of the second motor 601, the limiting groove 603 is formed at the bottom end of the electric telescopic rod 602, the limiting block 604 is fixed inside the limiting groove 603, the connecting knob 605 is threadedly connected to the inner wall of the limiting groove 603, the limiting seat 606 is provided at the bottom end of the connecting knob 605, the fixing nuts 607 are threadedly connected to the outer wall of the limiting seat 606, the electric telescopic rod 602 is fixed at the output end of the second motor 601, the circular hole is formed at the center of the connecting knob 605, the fixing nuts 607 are provided with four groups of installed on the outer wall of the limiting seat 606, and the fixing nuts 607 are equidistantly arranged about the central axis of the limiting seat 606.

[0040] With the above scheme: the limiting seat 606 of a suitable size is inserted into the inside of the connecting knob 605 through the fixing rod at the top end, and then inserted into the center of the limiting block 604. The connecting knob 605 is rotated, and the threads arranged on the outer wall of the connecting knob 605 and the threads arranged on the inner wall of the limiting groove 603 can ascend when rotating, so that when the top end of the connecting knob 605 contacts the bottom of the limiting block 604 when ascending, the shape of the limiting block 604 can be shrunk, and then the top end of the limiting seat 606 contacts the limiting block 604, so that the position of the limiting seat 606 is fixed. After the small-diameter long and high sample is placed in the inside of the limiting seat 606 of a suitable size, the position of the small-diameter long and high sample is centered and fixed by rotating a plurality of fixing nuts 607. At this time, the bottom end of the small-diameter long and high sample contacts the positioning seat 301. The second motor 601 is started to drive the electric telescopic rod 602 and the components below to rotate, so that the small-diameter long and high sample can be rotated.

[0041] As shown in FIGS. 1-8, the top end of the base 1 is provided with a grinding mechanism 3, which includes a positioning seat 301, a positioning plate 302 and a fixing knob 303. The positioning seat 301 is fixed at the top end of the workbench 2. The inner wall of the positioning seat 301 is rotatably connected with the positioning plate 302. One end of the positioning plate 302 is provided with a centering cylinder 304. The top end of the positioning plate 302 is provided with the fixing knob 303. The bottom end of the positioning plate 302 is fixed with the first motor 305. The outer wall of the positioning plate 302 is sleeved with the belt 306. The positioning seat 301 is provided with three groups of equidistant distribution about the central axis of the workbench 2. The outer wall of the fixing knob 303 is in close contact with the inner wall of the positioning seat 301. The fixing knob 303 and the positioning seat 301 are provided in threaded connection.

[0042] With the above scheme: the positioning plate 302 is sleeved on the outer wall of the positioning seat 301 and can be rotated. After the positioning plate 302 of a suitable height for the small-diameter long and high sample is sleeved on the outer wall of the positioning seat 301, it is rotated to an angle that is in close contact with the small-diameter long and high sample. The centering cylinder 304 at the front end of the positioning plate 302 in contact with the small-diameter long and high sample can center the small-diameter long and high sample when rotating. The fixing knob 303 is rotated. The fixing knob 303 is matched with the threads in the positioning seat 301 through its own threads, and can fix the angle of the positioning plate 302 when descending. Three groups of positioning plates 302 are provided, and the belt 306 is sleeved on the outer wall of the three groups of positioning plates 302. The first motor 305 is started to drive a group of positioning plates 302 to rotate, so that the position of the belt 306 moves, and then simultaneously drives the angles of the three groups of positioning plates 302 to change, so that they can center the small-diameter long and high sample.

[0043] As shown in FIGS. 1-8, the top end of the base 1 is provided with a sample collection mechanism 7, which includes a grinding table 701, a sample collection groove 702 and a guide hole 703. The grinding table 701 is fixed at the top end of the workbench 2. The top end of the grinding table 701 is provided with the sample collection groove 702. The bottom end of the grinding table 701 is provided with the guide hole 703. The sample collection groove 702 is provided with a plurality of groups of equidistant distribution about the central axis of the grinding table 701. The guide hole 703 is provided with four groups of equidistant distribution about the central axis of the grinding table 701. The top end of the inside of the base 1 is fixed with a third motor 704. The top end of the third motor 704 is fixed with a connecting rod 705. The top end of the connecting rod 705 is fixed with a sample collection fan 706.

[0044] By adopting the above scheme: the top end of the grinding table 701 is provided with rough particles, so that the bottom end of the small-diameter long and high sample is ground after contacting the grinding table. The sample can fall into the inside of the grinding table 701 by providing the sample collection groove 702. The sample is further collected into the inside of the sample collection box 11 by the guide hole 703 provided at the bottom of the grinding table 701.

[0045] The application also provides a method for grinding a small-diameter long and high sample, which comprises the following steps:

[0046] S1, insert the limiting seat 606 of a suitable size into the inside of the connecting knob 605 through the fixing rod at the top end, and then into the center of the limiting block 604. Rotate the connecting knob 605. The connecting knob 605 can ascend when rotating through the threads provided on the outer wall and the threads provided on the inner wall of the limiting groove 603. When the connecting knob 605 contacts the bottom of the limiting block 604 by the shape at the top end when ascending, the shape of the limiting block 604 can be contracted. Then the top end of the limiting seat 606 contacts the limiting block 604, so that the position of the limiting seat 606 is fixed. After the small-diameter long and high sample is placed in the limiting seat 606 of a suitable size, the position of the small-diameter long and high sample is centered and fixed by rotating a plurality of fixing nuts 607. At this time, the bottom end of the small-diameter long and high sample contacts the positioning seat 301. Start the second motor 601 to drive the electric telescopic rod 602 and the components below to rotate, so that the small-diameter long and high sample can rotate with it.

[0047] S2, the positioning plate 302 is sleeved on the outer wall of the positioning seat 301 and can rotate. After the positioning plate 302 of a suitable height for the small-diameter long and high sample is sleeved on the outer wall of the positioning seat 301, it is rotated to an angle that is in close contact with the small-diameter long and high sample. The angle can ensure that the small-diameter long and high sample is fixed in the centering cylinder 304 that contacts the small-diameter long and high sample when rotating. Rotate the fixing knob 303. The fixing knob 303 is matched with the threads in the positioning seat 301 through its own threads. When descending, the angle of the positioning plate 302 can be fixed.

[0048] S3, by setting with three sets of positioning plate 302, and in three sets of positioning plate 302 outer wall set with belt 306, start the first motor 305, the first motor 305 can drive a set of positioning plate 302 to rotate, so that the position of the belt 306 moves, and further simultaneously drive the angle of three sets of positioning plate 302 to change, so that it can center the small diameter long high sample;

[0049] S4, the top of the grinding table 701 is provided with rough particles, so that the bottom end of the small diameter long high sample contacts the grinding table and grinds it, the sample can fall into the inside of the grinding table 701 by setting the sample collecting groove 702, and then the sample is further collected into the sample collecting box 11 by the guide hole 703 opened at the bottom of the grinding table 701;

[0050] S5, start the third motor 704, the third motor 704 drives the connecting rod 705 to rotate, and further drives the sample collecting fan 706 to rotate, the sample collecting fan 706 generates suction when rotating, so that the small diameter long high sample is sucked into the inside of the grinding table 701 through the sample collecting groove 702 when grinding the sample, and then falls into the inside of the sample collecting box 11 through the guide hole 703;

[0051] S6, the control buttons 9 and signal indicating lights 10 above the console 8 can control the operation of the device to run, turn off and observe, after grinding and collecting the small diameter long high sample, open the cabinet door 12, slide out the sample collecting box 11, extract part of the ground sample, observe it through the laboratory microscope, and record the data.

[0052] It should be noted that in this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0053] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A grinding device for small diameter long high sample millings, comprising a base (1), characterised in that: The top end of the base (1) is fixed with a workbench (2), the top end of the workbench (2) is fixed with a supporting rod (4), the top end of the supporting rod (4) is fixed with a top plate (5), and the top end of the top plate (5) is provided with a fixing mechanism (6); The fixing mechanism (6) comprises a second motor (601), an electric telescopic rod (602) and a limiting groove (603), the second motor (601) is fixed at the top end of the top plate (5), the bottom end of the second motor (601) is fixed with the electric telescopic rod (602), the bottom end of the electric telescopic rod (602) is provided with the limiting groove (603), the inside of the limiting groove (603) is fixed with a limiting block (604), and the inner wall of the limiting groove (603) is threadedly connected with a connecting knob (605), the bottom end of the connecting knob (605) is provided with a limiting seat (606), and the outer wall of the limiting seat (606) is threadedly connected with a fixing nut (607).

2. The polishing apparatus for a small diameter long high sample polish according to claim 1, wherein: The electric telescopic rod (602) is fixed at the output end of the second motor (601), a circular hole is formed in the center of the connecting knob (605), the fixing nut (607) is provided with four groups of mounting walls on the outer wall of the limiting seat (606), and the fixing nut (607) is arranged at equal intervals about the central axis of the limiting seat (606).

3. The apparatus of claim 1, wherein: The top end of the base (1) is provided with a grinding mechanism (3), the grinding mechanism (3) comprises a positioning seat (301), a positioning plate (302) and a fixing knob (303), the positioning seat (301) is fixed at the top end of the workbench (2), the inner wall of the positioning seat (301) is rotatably connected with the positioning plate (302), one end of the positioning plate (302) is provided with a centering cylinder (304), and the top end of the positioning plate (302) is provided with the fixing knob (303).

4. The apparatus of claim 3, wherein: The bottom end of the positioning plate (302) is fixed with a first motor (305), and the outer wall of the positioning plate (302) is sleeved with a belt (306).

5. The apparatus of claim 3, wherein: The positioning seat (301) is provided with three groups of mounting walls which are arranged at equal intervals about the central axis of the workbench (2), the outer wall of the fixing knob (303) is fitted with the inner wall of the positioning seat (301), and the fixing knob (303) and the positioning seat (301) are threadedly connected.

6. The apparatus of claim 1, wherein: The top end of the base (1) is provided with a sample collecting mechanism (7), the sample collecting mechanism (7) comprises a grinding table (701), a sample collecting groove (702) and a guide hole (703), the grinding table (701) is fixed at the top end of the workbench (2), the top end of the grinding table (701) is provided with the sample collecting groove (702), the bottom end of the grinding table (701) is provided with the guide hole (703), the top end of the inside of the base (1) is fixed with a third motor (704), the top end of the third motor (704) is fixed with a connecting rod (705), and the top end of the connecting rod (705) is fixed with a sample collecting fan (706).

7. The apparatus of claim 6, wherein: The sample collecting groove (702) is provided with several groups of guide holes (703) which are equidistantly distributed about the central axis of the grinding table (701).

8. The apparatus of claim 1, wherein: The outer wall of the base (1) is fixedly connected with a control console (8), the top end of the control console (8) is provided with a control button (9), the top end of the control console (8) is fixedly connected with a signal indicator lamp (10), the bottom end of the inside of the base (1) is provided with a sample collecting box (11), and the outer wall of the base (1) is rotatably connected with a cabinet door (12).

9. The apparatus of claim 8, wherein: The support rod (4) is provided with four groups of equidistantly distributed support rods (4) about the central axis of the workbench (2), the bottom end of the sample collecting box (11) is provided with a sliding groove, the bottom end of the inside of the base (1) is provided with a sliding block, and the sample collecting box (11) and the base (1) are slidably connected.

10. A method for preparing a small, long and high sample by using the grinding device according to any one of claims 1 to 9, wherein: The method comprises the following steps: S1, the appropriate size of the limiting seat (606) is inserted into the inside of the connecting knob (605) through the top end of the fixed rod, and then inserted into the center of the limiting block (604), the connecting knob (605) is rotated, the connecting knob (605) can go up when rotating through the threads arranged on the outer wall and the threads arranged on the inner wall of the limiting groove (603), so that when the top end of the connecting knob (605) contacts the bottom of the limiting block (604) when going up, the shape of the limiting block (604) can be shrunk, and then the top end of the limiting seat (606) contacts the limiting block (604), so that the position of the limiting seat (606) is fixed, after the small-diameter long and high sample is placed in the appropriate size of the limiting seat (606), the position of the small-diameter long and high sample is centered and fixed by rotating a plurality of fixed nuts (607), at this time the bottom end of the small-diameter long and high sample contacts the positioning seat (301), and the second motor (601) drives the electric telescopic rod (602) and the components below to rotate, so that the small-diameter long and high sample can rotate; S2, the positioning plate (302) is sleeved on the outer wall of the positioning seat (301) and can rotate, the positioning plate (302) with a height suitable for the small-diameter long and high sample is sleeved on the outer wall of the positioning seat (301), and then rotated to an angle adhering to the small-diameter long and high sample, which can ensure that the small-diameter long and high sample is fixed in the centering cylinder (304) contacting the small-diameter long and high sample when rotating, and the small-diameter long and high sample is centered, and the fixed knob (303) is rotated, the fixed knob (303) is matched with the threads in the positioning seat (301) through its own threads, and can fix the angle of the positioning plate (302) when going down; S3, three groups of positioning plates (302) are arranged, a belt (306) is sleeved on the outer wall of the three groups of positioning plates (302), the first motor (305) is started, the first motor (305) can drive a group of positioning plates (302) to rotate, so that the position of the belt (306) moves, and then simultaneously drives the angles of the three groups of positioning plates (302) to change, so that they can center the small-diameter long and high sample; S4, the top of the grinding table (701) is provided with rough particles, so that the bottom end of the small diameter long and high sample is ground after contacting the grinding table, the sample can fall into the inside of the grinding table (701) by setting the sample collecting groove (702), and then the sample further falls into the inside of the sample collecting box (11) through the guide hole (703) opened at the bottom of the grinding table (701) to collect the sample; S5, start the third motor (704), the third motor (704) drives the connecting rod (705) to rotate, and then drives the sample collecting fan (706) to rotate, the sample collecting fan (706) generates suction when rotating, so that the small diameter long and high sample is sucked into the inside of the grinding table (701) through the sample collecting groove (702) when grinding the sample, and then falls into the inside of the sample collecting box (11) through the guide hole (703); S6, the control buttons (9) and signal indicating lamps (10) above the console (8) can control the operation of the device, such as running, closing and observing, after grinding and collecting the small diameter long and high sample, open the cabinet door (12), slide out the sample collecting box (11), extract part of the ground sample, observe it through the laboratory microscope, and record the data.

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