CN109015211B - A metallographic sample preparation device - Google Patents

Abstract

The invention provides a metallographic sample preparation device, comprising an indexing head rotary motion mechanism, a lateral horizontal reciprocating linear motion mechanism and a vertical reciprocating linear motion mechanism; the indexing head of the indexing head rotary motion mechanism and three uniformly distributed The floating cylindrical rollers are in direct contact, and there is no requirement for coaxiality. Four small grooves are evenly distributed on the outer surface of the indexing head. Every 90 degrees of rotation, the spring pin will be embedded in the small grooves to realize the indexing. Precise indexing of the head on 4*90 degrees. The vertical reciprocating linear motion mechanism is driven by a servo motor to drive the ball screw and nut pair, which can precisely control the distance of the sliding plate in the vertical direction, precisely control the amount of grinding, and ensure the effect of grinding and polishing. The horizontal horizontal reciprocating linear motion mechanism can adjust the elongation or shortening of the front lateral arm, so that the sample can be fully covered with sandpaper, which greatly improves the utilization rate of sandpaper and reduces the cost. The device of the invention has the advantages of simple structure, stable operation, accurate transmission, uniform grinding, high efficiency and good flexibility.

Description

A metallographic sample preparation device

technical field

The invention relates to the field of sample preparation devices, in particular to a metallographic sample preparation device.

Background technique

Metallographic analysis plays an important role in the field of metal materials research. The properties of metal materials can be studied by analyzing the microstructure of metal materials. With the continuous improvement and development of testing equipment such as metallographic microscopes and electron microscopes, metallographic analysis has gradually advanced to a higher level. In order to meet the needs of this development, metal material sample preparation technology and equipment should also be developed accordingly. Sample preparation is an important prerequisite and basis for microstructure testing. First, a sample that can reflect the real structure of the material to be tested must be prepared, and "pseudo-structure" cannot be formed due to improper operation during the sample preparation process; in addition, sample preparation Reproducibility should be good, preparation time should be kept as short as possible, and cost should be kept as low as possible.

At present, there are two main methods for metallographic sample preparation: machine preparation and manual preparation. Compared with manual preparation, machine preparation of metallographic samples has high efficiency, easy quality control, and lower requirements for operators. However, in the process of preparing metallographic samples by machines, some machines mainly control the samples and grinding discs for grinding by means of cylinder drive, which is not only difficult to maintain a constant air pressure value, but also has a delay in action: from issuing commands to driving There is a certain time delay for the cylinder to execute the action. After the sample has been ground for a period of time, some preparation machines use the belt drive to control its rotation indexing. The belt drive has a large outer contour, low transmission efficiency, short life and low transmission accuracy, which will seriously affect the sample. In addition, in some sample preparation machines, the rotating shaft that controls the rotation indexing of the sample is directly matched with the machine body and has a long matching distance, which increases the rotating shaft and the machine body. Due to the difficulty of processing the shaft hole, it is difficult to ensure the coaxiality during assembly. In addition, in some existing preparation machines, independent rough grinding area and fine grinding area are set up, and the sample is ground in the two areas successively by rotating the entire sample holding mechanism, but the lateral movement of the grinding sample cannot be performed. Reduced sandpaper utilization; most sample preparation machines connect the sample rotating indexing shaft, servo motor, and sample chuck with couplings, which are difficult to disassemble, so generally only a specific shape and a certain range of sizes can be ground. of the sample.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a metallographic sample preparation device. The present invention creatively proposes to use a spring pin and four evenly distributed small grooves on the outer circumferential surface of the indexing head to form point-surface rolling contact. Realize the 4*90 degree indexing of the grinding sample; the indexing head is in contact with 3 evenly distributed floating cylindrical rollers, and is fixed with the left indexing head fastener and the right indexing head fastener to form a high pair of contact, There is no need for the indexing head to have high machining accuracy. The indexing head is in direct contact with the three evenly distributed floating cylindrical rollers, and there is no requirement for coaxiality. In addition, by controlling the lateral horizontal reciprocating linear motion mechanism of the sample preparation device, the invention can greatly improve the utilization rate of the sandpaper and reduce the cost; by replacing different sample chucks, the purpose of clamping, grinding and polishing different samples can be achieved, Improved processing flexibility. In addition, in the present invention, the overall support of the device is an equilateral triangle formed by three guide posts, which ensures the stability of the device. At the same time, the sample and the grinding disc are controlled by the servo motor driving the ball screw nut pair. For grinding, the rotary motion of the output shaft of the servo motor is changed into the vertical reciprocating linear movement of the slide plate, and the transmission is stable and accurate, which is beneficial to improve the grinding quality of the sample surface. The invention overcomes the problems of poor grinding surface quality, high technical requirements for operators, large accidental factors, low efficiency and difficult flexible processing of the sample in the process of clamping, grinding and polishing.

The technical scheme of the present invention is: a metallographic sample preparation device, comprising a rotary motion mechanism of an indexing head, a lateral horizontal reciprocating linear motion mechanism and a vertical reciprocating linear motion mechanism;

The rotary motion mechanism of the indexing head includes a sample chuck, an indexing head fastener, an indexing head and an indexing rotary wrench; the sample chuck is installed at the lower part of the indexing head, and the indexing head is tightly closed. The firmware is sleeved on the indexing head, the inner wall of the indexing head fastener is provided with a plurality of protruding floating cylindrical rollers, the indexing head is connected with the floating cylindrical roller high pair; the outer circle of the indexing head is There are several grooves on the surface, one end of the horizontal horizontal reciprocating linear motion mechanism is provided with a spring pin, and the spring pin is connected with the groove high pair; one end of the indexing head fastener is connected to the horizontal horizontal reciprocating linear motion mechanism The other end of the horizontal reciprocating linear motion mechanism is connected with the vertical reciprocating linear motion mechanism.

In the above solution, the outer surface of the indexing head is provided with four grooves; the four grooves are evenly arranged, and the interval between two adjacent grooves is 90 degrees.

In the above solution, the indexing head fastener includes a left indexing head fastener and a right indexing head fastener;

One end of the left indexing head fastener and the right indexing head fastener are respectively connected with one end of the horizontal horizontal reciprocating linear motion mechanism; the other end of the left indexing head fastener is connected with the right indexing head. The other end of the fastener is detachably attached.

In the above solution, the number of the floating cylindrical rollers is three, and the three floating cylindrical rollers are evenly distributed and adjacent to each other by 120 degrees.

In the above solution, the indexing rotary wrench is provided on the indexing head; the indexing rotary wrench is threadedly connected to the indexing head.

In the above scheme, the lateral horizontal reciprocating linear motion mechanism includes a front lateral arm, a linear guide rail pair, a rear lateral arm and a locking bolt; the front lateral arm is connected with the rear lateral arm through the linear guide rail pair;

One end of the locking bolt passes through the threaded hole of the rear lateral arm and contacts the surface of the front lateral arm.

In the above solution, the vertical reciprocating linear motion mechanism includes a servo motor, an upper base plate, several guide posts, a slide plate, a guide sleeve, a ball screw, a thrust ball bearing, a bearing seat and a lower base plate;

The servo motor is installed on the upper bottom plate, the output shaft of the servo motor is connected with one end of the ball screw through a coupling, and the other end of the ball screw passes through the sliding plate and is connected with the bearing seat through a thrust ball bearing, and the bearing seat and the lower bottom plate are connected. Interference fit; one end of the guide post is connected to the upper base plate through the connecting flange, and the other end of the guide post is connected to the lower base plate through the slide plate through the connecting flange; the guide post is clearance fit with the guide sleeve, and the guide sleeve and the slide plate Bolt connection; the ball screw is threaded with the ball screw nut installed on the slide plate; the slide plate is connected with the horizontal horizontal reciprocating linear motion mechanism.

In the above solution, the number of the guide posts is three, the three guide posts are distributed in an equilateral triangle, and the ball screw is located in the middle of the equilateral triangle.

In the above solution, the sample chuck is detachably installed at the lower part of the indexing head.

In the above solution, a control unit is also included; the control unit is connected with the servo motor.

Compared with the prior art, the beneficial effects of the present invention are:

1. The rotary motion mechanism of the indexing head of the present invention contains three floating cylindrical rollers, the indexing head is in direct contact with the three evenly distributed floating cylindrical rollers, and there is no requirement for coaxiality, thereby ensuring the stability of the indexing head There are four small grooves evenly distributed on the outer surface of the indexing head, and the spring pin will be embedded in the small grooves every 90 degrees of rotation, so as to realize the accurate indexing of the indexing head on 4*90 degrees. It can form a uniform grid that is orthogonal to each other on the grinding surface, which can improve the surface quality of the sample.

2. The vertical reciprocating linear motion mechanism of the present invention is driven by a servo motor to drive the ball screw and nut pair, and the up and down reciprocating linear motion of the slide plate is controlled by the control unit driving the servo motor, which can precisely control the distance of the slide plate in the vertical direction and precisely control the grinding. Dosage to ensure the effect of grinding and polishing.

3. The lateral horizontal reciprocating linear motion mechanism of the present invention can adjust the extension or shortening of the front lateral arm, so that the sample can be fully covered with the sandpaper, which greatly improves the utilization rate of the sandpaper and reduces the cost.

4. The present invention can achieve the purpose of clamping, grinding and polishing different samples by replacing different sample chucks, thereby improving processing flexibility.

5. The sample chuck of the present invention is detachably installed at the lower part of the indexing head, and samples of different shapes can be clamped by replacing different sample chucks.

6. The three guide posts of the present invention are distributed in an equilateral triangle to increase the stability of the device during operation.

7. The metallographic sample preparation device of the present invention has the advantages of simple mechanism, low cost, stable operation, accurate transmission, uniform grinding and high efficiency, and also reduces the technical requirements for operators.

Description of drawings

FIG. 1 is a schematic diagram of a metallographic sample preparation apparatus according to an embodiment of the present invention.

2 is a schematic perspective view of a metallographic sample preparation device according to an embodiment of the present invention.

FIG. 3 is a schematic view of the rotating motion mechanism of the indexing head in the direction A of FIG. 1 .

FIG. 4 is a schematic diagram of a floating cylindrical roller structure according to an embodiment of the present invention.

FIG. 5 is a schematic perspective view of a floating cylindrical roller structure according to an embodiment of the present invention.

6 is a cross-sectional view of a floating cylindrical roller structure according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of B-B in FIG. 6 .

8 is a side view of a lateral horizontal reciprocating linear motion mechanism according to an embodiment of the present invention.

FIG. 9 is a plan view of a lateral horizontal reciprocating linear motion mechanism according to an embodiment of the present invention.

10 is a perspective view of a vertical reciprocating linear motion mechanism according to an embodiment of the present invention.

In the figure, 1-sample chuck; 2-chuck wrench; 3-indexing head fastener locking bolt; 4-left indexing head fastener; 5-indexing head, 6-indexing rotary wrench ;7—The connecting bolt of the indexing head fastener, 8—the front transverse arm; 9—the linear guide rail pair; 10—the locking bolt; 11—the rear transverse arm; 12—the lower part of the coupling; 13—the upper part of the coupling 14—servo motor; 15—motor locking bolt; 16—motor bracket; 17—upper base plate locking bolt; 18—upper base plate; 19—connecting flange; 20—guide post; 21—ball screw nut; 22—slide plate; 23—guide sleeve; 24—ball screw; 25—blocking cover; 26—thrust ball bearing; 27—bearing seat; 28—lower bottom plate; 29—spring pin; 30—right indexing head fastener ; 31—floating cylindrical roller; 32—flange cup bearing; 33—fixed block; 34—return spring; 35—floating cylindrical roller support; 36—control unit.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Figures 1 and 2 show an embodiment of the device for preparing metallographic samples according to the present invention. The device for preparing metallographic samples includes a rotary motion mechanism of an indexing head, a lateral horizontal reciprocating linear motion mechanism, and a Vertical reciprocating linear motion mechanism. One end of the indexing head fastener is connected with one end of the horizontal horizontal reciprocating linear motion mechanism, and the other end of the horizontal horizontal reciprocating linear motion mechanism is connected with the vertical reciprocating linear motion mechanism.

The rotary motion mechanism of the indexing head is used to perform a 4*90 degree rotary motion on the sample after clamping the sample, which can effectively eliminate the scratches produced by the sample and the sandpaper during the grinding process. The lateral horizontal reciprocating linear motion mechanism adjusts the horizontal distance of the front lateral arm in the device, so that the sample can cover any position of the sandpaper. The vertical reciprocating linear motion mechanism is converted into the linear motion of the ball screw nut pair through the rotational motion of the output shaft of the servo motor, so as to precisely control the linear distance in the vertical direction of the sample during the grinding and polishing process.

As shown in Figures 3, 4 and 5, the rotating motion mechanism of the indexing head includes a sample chuck 1, a chuck wrench 2, a locking bolt 3 of an indexing head fastener, a left indexing head fastener 4, Right indexing head fastener 30, indexing head 5, indexing rotary wrench 6, spring pin 29, multiple floating cylindrical roller structures, indexing head fastener connecting bolt 7, flange cup bearing 32, fixed Block 33 , return spring 34 , floating cylindrical roller support 35 .

The sample chuck 1 is detachably connected to the indexing head 5 through bolts, and the jaws are adjusted by rotating the chuck wrench 2 to clamp the sample. The chuck wrench 2 has sufficient clearance with the chuck, and can be Remove from sample chuck 1. The indexing head fastener composed of the left indexing head fastener 4 and the right indexing head fastener 30 is sleeved on the indexing head 5, and the left indexing head fastener 4 and the right indexing head are tightened. One end of the fastener 30 forms a rotating pair with the front transverse arm 8 through the indexing head fastener connecting bolt 7, and the left indexing head fastener 4 and the right indexing head fastener 30 can be rotated within a certain range; After the head 5 is placed in a proper position, the indexing head 5 is fixed with the left indexing head fastener 4 and the right indexing head fastener 30 with the indexing head fastener locking bolt 3 . The outer surface of the indexing head 5 is provided with four evenly distributed grooves, and the interval between two adjacent grooves is 90 degrees. Rotating the indexing head 5, the spring pin 29 can form a high pair with point-to-surface contact with one of the grooves. The tip of the spring pin 29 is a rolling body, which forms rolling friction with the groove, and can achieve 4*90 degree indexing.

As shown in FIGS. 6 and 7 , the number of the floating cylindrical roller structures in this embodiment is three, and the floating cylindrical roller structure includes floating cylindrical rollers 31 , flanged cup bearings 32 , fixed blocks 33 , Return spring 34 and floating cylindrical roller support 35 . The floating cylindrical roller 31 can float in the direction of the return spring 34 . In this embodiment, one floating cylindrical roller 31 is installed on the left indexing head fastener 4, two floating cylindrical rollers 31 are installed on the right indexing head fastener 30, and the three floating cylindrical rollers 31 are evenly distributed Distribution, the angle between two adjacent floating cylindrical rollers 31 is 120 degrees, and the indexing head 5 forms high contact with the three floating cylindrical rollers 31 . The indexing head 5 is provided with an indexing rotating wrench 6; the indexing rotating wrench 6 is connected with the indexing head 5 through threads, and can be removed from the indexing head.

The lateral horizontal reciprocating linear motion mechanism includes a front lateral arm 8 , a pair of linear guide rails 9 , a rear lateral arm 11 and a locking bolt 10 .

As shown in Figures 8 and 9, the lateral horizontal reciprocating linear motion mechanism includes a front lateral arm 8, a pair of linear guide rails 9, a rear lateral arm 11 and a locking bolt 10; the front lateral arm 8 is connected to the rear through the pair of linear guide rails 9 The transverse arms 11 are connected; one end of the locking bolts 10 is in contact with the surface of the front transverse arms 8 through the threaded holes of the rear transverse arms 11 .

A fixed plate is installed on the inner wall of the rear lateral arm 11, the slider of the linear guide rail pair 9 is connected with the fixed plate by bolts, the front lateral arm 8 is connected with the guide rail of the linear guide rail pair 9 with bolts, and the slider of the linear guide rail pair 9 is connected with the fixed plate. The movement of the guide rail drives the front transverse arm 8 and the rear transverse arm 11 to move relative to each other. After adjusting to the proper position, tighten the locking bolt 10 to fix the relative position of the front transverse arm 8 and the rear transverse arm 11 . The front lateral arm 8 and the rear lateral arm 11 are connected by the linear guide rail pair 9, which can ensure the stability of the lateral horizontal movement of the sample during the grinding or polishing process; The lateral arm 11 is fixed. Therefore, it is controlled by screwing in or out the locking bolt 10 whether it is in contact with the surface of the front lateral arm 8; Can be moved.

As shown in Figure 10, the vertical reciprocating linear motion mechanism includes a coupling, a servo motor 14, a motor locking bolt 15, a motor bracket 16, an upper bottom plate locking bolt 17, an upper bottom plate 18, a connecting flange 19, Guide post 20 , ball screw nut 21 , slide plate 22 , guide sleeve 23 , ball screw 24 , blocking cover 25 , thrust ball bearing 26 , bearing seat 27 , lower base plate 28 and control unit 36 . The coupling includes a coupling upper piece 13 and a coupling lower piece 12 .

The servo motor 14 is fixed to the motor bracket 16 by the motor locking bolt 15, and the output shaft of the servo motor 14 is connected to one end of the ball screw 24 through the coupling upper piece 13 and the coupling lower piece 12, and the ball screw 24 The other end of the guide post 20 is connected to the bearing seat 27 through the thrust ball bearing 26 through the sliding plate 22, and the bearing seat 27 and the lower bottom plate 28 are interference fit; one end of the guide column 20 is connected to the upper bottom plate 18 through the connecting flange 19, The other end of the 20 passes through the slide plate 22 and is connected to the lower bottom plate 28 through the connecting flange 19; the guide post 20 is in clearance fit with the guide sleeve 23, and the guide sleeve 23 is bolted to the slide plate 22; the ball screw 24 is installed on the slide plate. The ball screw nut 21 on the 22 is threaded; the sliding plate 22 is connected with the rear lateral arm 11 of the lateral horizontal reciprocating linear motion mechanism. The control unit 36 is connected to the servo motor 14 . The reciprocating linear motion process of the sliding plate up and down is controlled by the control unit driving the servo motor.

In this embodiment, the number of the guide posts 20 is three, the three guide posts 20 are distributed in an equilateral triangle, and the ball screw 24 is located in the middle of the equilateral triangle.

The rotary motion of the output shaft of the servo motor 14 is transformed into the vertical reciprocating linear movement of the slide plate 22 through the screw nut pair formed by the ball screw 24 and the ball screw nut 21. The control unit 36 can precisely control the servo motor 14, and then precisely control The distance that the sample moves up and down during the grinding and polishing process; the three guide posts 20 are connected to the upper bottom plate 18 through the connecting flange 19, the guide posts 20 and the connecting flange 19 are interference fit, and the three guide posts 20 are equilateral triangles Distribution; three guide posts 20 respectively pass through three guide sleeves 23 to form clearance fit, and the three guide sleeves 23 are connected with the slide plate 22 by bolts; the ball screw 24 is matched with the ball screw nut 21, and the ball screw nut 21 is connected with the slide plate 22 Fastened with bolts, one end of the ball screw 24 is connected to the lower piece 12 of the coupling through the upper base plate 18; the lower base plate 28 has mounting holes to facilitate the installation of the entire device on other equipment, and the other ends of the three guide posts 20 are connected to the lower plate 12. The bottom plate 28 is respectively connected by three connecting flanges 19 , the guide post 20 and the connecting flange 19 are in an interference fit, the ball screw 24 is connected with the bearing seat 27 through the thrust ball bearing 26 , and the blocking cover 25 is located above the thrust ball bearing 26 , and is detachably connected to the bearing seat 27 through the ball screw 24 to prevent dust or foreign matter from entering the thrust ball bearing 26 under working conditions. The bearing seat 27 and the lower bottom plate 28 are interference fit, and the sliding plate 22 The rear transverse arms 11 are joined together by welding.

The steps of using the present invention to carry out the clamping grinding and polishing of the sample are as follows:

Step 1: Select the appropriate sample chuck 1 according to the size and shape of the grinding and polishing sample, and connect it with the dividing head 5 with bolts, adjust the position of the sample in the sample chuck 1, and ensure that the sample is With sufficient grinding and polishing lengths, turn the chuck wrench 2 to clamp the specimen;

Step 2: Adjust the indexing head 5 so that the spring pin 29 is in contact with a small groove in the indexing head 5, and adjust the locking bolt 3 of the indexing head fastener so that the three floating cylindrical rollers 31 are in contact with the indexing head 5 Contact compact;

Step 3: Adjust the front lateral arm 8 so that the sample is in a reasonable position for grinding with sandpaper, and lock the locking bolt 10;

Step 4: Check whether the rotation of the ball screw nut 21 and the ball screw 24 is abnormal;

Step 5: run the control unit 36 driver to make the movement of the slide plate 22 return to the zero point;

Step 6: In normal operation, let the slide plate 22 quickly reach a safe position with a certain distance from the sandpaper, and then feed at a slow speed. When the sample is in contact with the sandpaper, a reasonable grinding can be determined according to the initial surface condition of the sample Feed amount; at the same time, set the time of a single grinding and the total grinding time;

Step 7: After the sample is ground to the set single time, quickly raise the slide plate 22, manually turn the indexing rotary wrench 6, after turning 90 degrees, continue to descend, continue grinding, and after reaching the set single time of grinding, Quickly raise the slide plate 22, manually turn the indexing rotary wrench 6, turn it 90 degrees again, and push it inward until the total grinding time is set;

Step 8: After the sample grinding stage is completed, polish the sample and repeat Step 7;

Step 9: After finishing polishing, observe whether the surface quality meets the requirements. If it meets the requirements, replace the sample and continue grinding. If it does not meet the requirements, place the original sample on the sample chuck 1 and repeat steps 7 and 8.

The invention can precisely control the amount of grinding and ensure good results of grinding and polishing; the sandpaper is fully covered, the utilization rate of the sandpaper is greatly improved, and the cost is reduced.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims (5)

1. a metallographic sample preparation device, is characterized in that, comprises indexing head rotary motion mechanism, horizontal horizontal reciprocating linear motion mechanism and vertical direction reciprocating linear motion mechanism; The indexing head rotary motion mechanism includes a sample chuck (1), an indexing head fastener, an indexing head (5), a plurality of floating cylindrical roller structures and an indexing rotating wrench (6); The sample chuck (1) is installed on the lower part of the indexing head (5), the indexing head fastener is sleeved on the indexing head (5), and the inner wall of the indexing head fastener is provided with a plurality of protruding protrusions. A floating cylindrical roller (31); the outer circular surface of the indexing head (5) is provided with four grooves, and one end of the lateral horizontal reciprocating linear motion mechanism is provided with a spring pin (29), the spring pin ( 29) Connect with the groove high pair; one end of the indexing head fastener is connected with one end of the horizontal horizontal reciprocating linear motion mechanism, and the other end of the horizontal horizontal reciprocating linear motion mechanism is connected with the vertical direction reciprocating linear motion mechanism ; The lateral horizontal reciprocating linear motion mechanism includes a front lateral arm (8), a linear guide rail pair (9), a rear lateral arm (11) and a locking bolt (10); the front lateral arm (8) passes through the linear guide rail pair (10). 9) is connected with the rear lateral arm (11); one end of the locking bolt (10) is in contact with the surface of the front lateral arm (8) through the threaded hole of the rear lateral arm (11); The four grooves are evenly arranged, and the interval between two adjacent grooves is 90 degrees; the indexing head fastener includes a left indexing head fastener (4) and a right indexing head fastener (30); One ends of the left indexing head fastener (4) and the right indexing head fastener (30) are respectively connected with one end of the horizontal horizontal reciprocating linear motion mechanism in a rotating pair; the left indexing head fastener (4) ) is detachably connected with the other end of the right indexing head fastener (30); The floating cylindrical roller structure includes a floating cylindrical roller (31), a flanged cup bearing (32), a fixed block (33), a return spring (34) and a floating cylindrical roller support (35); the floating cylindrical roller Both ends of the roller (31) are respectively mounted on a fixed block (33) through a flanged cup bearing (32), the fixed block (33) is mounted on a floating cylindrical roller support (35), and the floating cylindrical The roller support (35) is provided with a return spring (34), the return spring (34) is connected with the fixed block (33), and the floating cylindrical roller (31) can be extended along the direction of expansion and contraction of the return spring (34). Floating; install one floating cylindrical roller (31) on the left indexing head fastener (4), two floating cylindrical rollers (31) on the right indexing head fastener (30), three floating The cylindrical rollers (31) are evenly distributed, the angle between two adjacent floating cylindrical rollers (31) is 120 degrees, and the indexing head (5) forms high contact with the three floating cylindrical rollers (31); The vertical reciprocating linear motion mechanism includes a servo motor (14), an upper bottom plate (18), a plurality of guide posts (20), a slide plate (22), a guide sleeve (23), a ball screw (24), and a thrust ball bearing (26), a bearing seat (27) and a lower base plate (28); the servo motor (14) is mounted on the upper base plate (18), and the output shaft of the servo motor (14) is connected to the ball screw (24) through a coupling The other end of the ball screw (24) is connected with the bearing seat (27) through the sliding plate (22) through the thrust ball bearing (26), and the bearing seat (27) and the lower bottom plate (28) are in an interference fit; One end of the guide column (20) is connected with the upper bottom plate (18) through the connecting flange (19), and the other end of the guide column (20) passes through the sliding plate (22) and is connected with the lower bottom plate (28) through the connecting flange (19) ) connection; the guide post (20) is in clearance fit with the guide sleeve (23), and the guide sleeve (23) is bolted to the slide plate (22); the ball screw (24) is connected to the balls mounted on the slide plate (22) The screw nut (21) is threaded; the sliding plate (22) is connected with the horizontal horizontal reciprocating linear motion mechanism. 2 . The metallographic sample preparation device according to claim 1 , wherein an indexing rotary wrench (6) is provided on the indexing head (5); The degree head (5) is threaded. 3 . The metallographic sample preparation device according to claim 1 , wherein the number of the guide posts ( 20 ) is three, the three guide posts ( 20 ) are distributed in an equilateral triangle, and the ball screws ( 24) in the middle of an equilateral triangle. 4 . The metallographic sample preparation device according to claim 1 , wherein the sample chuck ( 1 ) is detachably mounted on the lower part of the indexing head ( 5 ). 5 . 5 . The metallographic sample preparation device according to claim 1 , further comprising a control unit ( 36 ); the control unit ( 36 ) is connected to the servo motor ( 14 ). 6 .

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