A metal sample polishing device capable of automatically adjusting the grinding depth and a working method thereof

Abstract

The present invention relates to a metal sample polishing device with automatic grinding depth adjustment and a working method thereof, comprising a machine base, a turntable rotatably connected to the machine base, the lower end of the turntable being driven to rotate and supported by a driving mechanism, a clamping mechanism evenly distributed along the circumferential direction of the upper end surface of the turntable, a pneumatic chuck for clamping the metal sample being arranged on the top of the clamping mechanism, a grinding mechanism matched with the clamping mechanism being arranged on the outer edge of the turntable, the grinding mechanisms being fixedly connected to the surface of the machine base, the metal sample polishing device with automatic grinding depth adjustment is suitable for grinding and polishing metal samples of various sizes and shapes, and ensures the consistent surface roughness of each sample.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a metal sample polishing device capable of automatically adjusting the grinding depth and a working method thereof. Background Art

[0002] The metal round bar specimen for laboratory use is a special specimen used to test the tensile properties, fatigue properties and other properties of metal materials. Because its processing technology is relatively simple and saves materials, it is frequently used in laboratories. However, the specimen is generally first taken out of the raw material by wire cutting, and then processed on a lathe. The round bar specimen cannot be polished on a grinder unless precision processing equipment is used, but it cannot be completed in an ordinary manufacturing plant, so it is generally difficult to polish the round bar specimen. In the prior art, most of the metal round bar specimens are polished by fixing them on a lathe and rotating them slowly, and then the staff holds sandpaper in their hands to polish the surface of the specimen. In this operation method, on the one hand, the grinding accuracy of the specimen surface is low, and the safety of the staff during the processing cannot be guaranteed; on the other hand, the surface roughness of the processed specimen often cannot meet the requirements, especially for fatigue specimens. If the roughness is too low, it will greatly affect the accuracy of the test data, and the obtained material fatigue-life (SN) curve will not meet the accuracy requirements. Therefore, researchers are eager to find a simple and lightweight device that can grind round bar specimens to meet the roughness requirements in the laboratory. This application is developed and designed based on this background. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a metal sample polishing device and a working method thereof that can automatically adjust the grinding depth, which not only improves the polishing efficiency and ensures the consistency of sample polishing, but also greatly shortens the grinding time and reduces labor costs.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a metal sample polishing device with automatically adjusting the grinding depth, comprising a machine base, a turntable is rotatably connected to the machine base, the lower end of the turntable is driven to rotate and supported by a driving mechanism, the upper end surface of the turntable is evenly spaced along its circumference with clamping mechanisms, the top of the clamping mechanism is provided with a pneumatic chuck for clamping the metal sample, the outer edge of the turntable is provided with a grinding mechanism that cooperates with the clamping mechanism one by one, and the grinding mechanisms are all fixedly connected to the surface of the machine base.

[0005] Furthermore, the driving mechanism includes a driving motor, a driving end of the driving motor is connected to a cam divider via a pulley and a synchronous belt, the cam divider is fixedly connected to the machine base, an input end thereof is connected to the pulley, and an output end is connected to the center of a turntable to drive it to rotate, the output end of the cam divider passes through the turntable and is fixedly connected to a high-speed rotating joint via a flange, and is connected to a driven wheel on the cam divider through a synchronous belt, the turntable is installed at the output end of the cam divider, the turntable realizes intermittent rotation every 90°, the flange is installed at the center hole of the turntable, the high-speed rotating joint is installed on the flange, and rotates with the turntable.

[0006] Furthermore, the clamping mechanism includes a small servo motor fixedly connected to the lower end of the turntable, the top end of the small servo motor is connected to a stepped shaft via a coupling, the upper end of the stepped shaft passes through the turntable and is rotatably connected to the turntable, the pneumatic chuck is arranged at the top of the stepped shaft, and the side of the pneumatic chuck is provided with a top device, the top device includes a top plate, one end of the top plate is connected to two top wheels for abutting against the side of the metal sample, the other end of the top plate is supported by a T-shaped support seat and fixedly connected to the turntable, the opening and closing of the chuck is controlled by air pressure, thereby realizing the clamping and disassembly of the sample, the top device is installed on the turntable, and the position of the top device is adjusted to avoid the lateral force caused by grinding and polishing causing bending of the sample.

[0007] Furthermore, the T-shaped base is fixed at 90° on the turntable, and the top plate is fixed on the top of the T-shaped base by countersunk bolts. There are two pin holes at the other end of the top plate. The deep groove ball bearing is fixed to the two pin holes of the top plate by pins, and the other end is fixed with an open retaining ring, and a gasket is installed between the deep groove ball bearing and the top plate.

[0008] Furthermore, the outer periphery of the stepped shaft is rotatably connected to the turntable via a tapered roller bearing and a bearing sleeve; an induction gasket is also provided at the top of the stepped shaft, the top of the pneumatic chuck clamps the metal sample via a spring collet, and the bottom end of the metal sample touches the induction gasket when clamped by the spring collet; the top wheels are connected to the top plate via pins and open retaining rings, and the two top wheels are spaced apart.

[0009] Furthermore, the grinding mechanism includes a support table, on which an electric cylinder motor is fixedly arranged, the output end of the electric cylinder motor is connected to an electric cylinder screw and drives the electric cylinder slider to move back and forth horizontally to approach or move away from the clamping mechanism via the electric cylinder screw, the top of the electric cylinder slider is fixedly connected to a vertically extending vertical plate, the top of the vertical plate is fixedly connected to an eccentric motor on the side away from the clamping mechanism, the output end of the eccentric motor passes through the vertical plate and is connected to the eccentric wheel, the other side surface of the eccentric wheel is connected to an L-shaped connecting plate via a fisheye bearing, the vertical plate is vertically provided with a slide rail for connecting vertical sliding on the side close to the clamping mechanism, a grinding motor is fixedly arranged on the connecting plate, the lower output end of the grinding motor is connected to a grinding disc, and a load sensor is provided on the back of the connecting plate.

[0010] Furthermore, a grinding fluid tank is provided below the support platform, the grinding fluid tank is connected to a grinding fluid pipe via a water pump, the grinding fluid pipe extends to the side of the grinding disc, and the grinding fluid tank, the water pump and the grinding fluid pipe constitute a spray mechanism.

[0011] Furthermore, the support platform is fixedly provided with an electric cylinder slide rail to which the electric cylinder slider is slidably connected, and the two side ends of the support platform are respectively fixedly provided with a vertically extending support plate and a screw support block, the electric cylinder motor is fixedly connected to the support plate, the end of the electric cylinder screw is rotatably connected to the screw support block and supported by it, and the docking end of the electric cylinder screw and the electric cylinder motor is supported by a baffle, and the bottom end of the baffle is fixedly connected to the support platform and limits the sliding range of the electric cylinder slider.

[0012] Furthermore, a flat plate is fixedly connected to the top end face of the electric cylinder slider, the bottom end of the vertical plate is fixedly connected to the flat plate, and a triangular-shaped rib plate is fixedly connected between the vertical plate and the flat plate; the lower end of the support platform is supported by a column, and the column is fixedly connected to the machine base; the output end of the grinding motor is connected to the grinding disc via a tightening sleeve.

[0013] Furthermore, an electric box is provided at the bottom end of the machine base, and a machine cover which covers the turntable, driving mechanism, clamping mechanism and polishing mechanism is fixedly provided at the upper end of the machine base. A sliding door is provided at the side end of the machine cover, and a control box electrically connected to the electric box, driving mechanism, clamping mechanism and polishing mechanism is also provided outside the side machine cover.

[0014] The connection relationship of the control system of the control box is: the spray mechanism is fixed on the machine base desktop, the load sensor is placed between the grinding mechanism connecting plate and the electric cylinder slider, the control box is provided with an emergency stop button, and the control box has various controllers that can control the start of the power supply, the speed and stop of each motor, the operation of the electric cylinder and the air cylinder, various parameter settings and data recording.

[0015] A working method of a metal sample polishing device with automatic adjustment of grinding depth is carried out according to the following steps: first, the metal sample is inserted into a spring chuck, the induction gasket senses the sample, and the signal is transmitted to the control box, the control box drives the pneumatic chuck of the clamping mechanism to contract, and after the sample is clamped, the driving motor of the driving mechanism drives the cam divider to rotate through the pulley, so that the turntable rotates intermittently to ensure sufficient sample replacement and grinding and polishing time; when the sample clamping system is driven by the turntable to rotate to the next station, the electric cylinder motor of the grinding mechanism works to move the electric cylinder slider closer to the sample and start the water pump for spraying, and when the rotating grinding After the disk contacts the sample, the eccentric motor and the electric cylinder motor are used to realize grinding and polishing at different heights and depths, and the grinding force is recorded by the load sensor. The grinding time is less than the dwell time of the turntable. After the grinding is completed at this station, the electric cylinder motor drives the slider back to its original position, the grinding disk leaves the sample, and the eccentric motor stops rotating. The sample is then driven by the driving mechanism to pass through multiple stations for grinding in sequence. The working principles of each station are the same. The particle size of the grinding disks at subsequent stations increases in sequence, and finally resets to the initial station. The control box drives the pneumatic chuck to open, take out the sample, and then change the sample for the next sample grinding.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the grinding depth and height of metal samples can be automatically adjusted; after grinding and polishing with grinding discs and polishing discs of different mesh sizes, the surface of the sample can present a mirror effect; the polishing effect is good and the polishing precision is high, thereby ensuring the consistency of the polishing precision of each sample and improving the accuracy of subsequent experiments; the polishing efficiency is high and it is suitable for polishing metal samples of different shapes; it is easy and fast to use and has a high degree of automated operation.

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 A three-dimensional diagram of an embodiment of the present invention with the hood removed;

[0020] Figure 3 Schematic diagram of the structure of the driving mechanism in an embodiment of the present invention;

[0021] Figure 4 is a cross-sectional view of a clamping mechanism in an embodiment of the present invention;

[0022] Figure 5 It is a front view of the grinding mechanism in the embodiment of the present invention;

[0023] Figure 6 It is a side view of the grinding mechanism in the embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0025] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] like Figure 1 and Figure 2 As shown, the patent of the present invention is a metal sample polishing device with automatic adjustment of grinding depth, including a machine base 4, an electric box 5 is provided in front of the machine base 4, a machine cover 1 is arranged on it, a sliding door 3 is provided in front of the machine cover 1, and a control box 2 of the whole machine is provided on the side of the sliding door. A driving mechanism 6 and a grinding mechanism 7 are provided inside the machine cover 1 and on the table of the machine base 4, and its sample clamping mechanism 8 is placed on the driving mechanism, and a sample 9 is clamped on the sample clamping mechanism 8.

[0028] In the embodiment of the present invention, Figure 3 As shown, the driving mechanism includes an air-cooled variable frequency motor (driving motor) 15, a pulley using a three-groove active pulley 16, a synchronous belt 14, a cam divider 13, a turntable 12, a flange 11, and a high-speed rotary joint 10. The pulley and the air-cooled variable frequency motor 15 are tightly matched, and the other end is connected to the input shaft of the cam divider 13 through the synchronous belt 14. The input shaft of the cam divider 13 and the pulley 16 are tightly matched. The turntable 12 is fixed to the output end of the cam divider 13 by countersunk bolts, and the turntable can achieve intermittent rotation every 90°. There is a hole in the middle of the turntable 12, and the flange 11 is fixed to the output end of the cam divider 13 by bolts through the hole of the turntable 12. The high-speed rotary joint 10 is fixed to the holes on the circumference of the flange 11 by bolts, so that the circuit and the gas path are not entangled with the rotation of the turntable. The cam divider is a general device and will not be described in detail here.

[0029] In the embodiment of the present invention, Figure 4As shown, the sample clamping mechanism includes a small servo motor 27, a baffle 26, a sleeve 25, a coupling 24, a flange 23, a bearing sleeve 22, a tapered roller bearing 21, a stepped shaft 20, an induction gasket 19, a pneumatic chuck 18, a spring collet 17, a pin 28, an open retaining ring 31, a top wheel 29, a top plate 30, and a T-shaped support seat 32. The baffle 26 is fixed to one end of the small servo motor 27 close to the extended shaft, the baffle 26 and the sleeve 25 are connected by bolts and nuts, and the other side of the sleeve 25 is fixed to the machine base 12 by bolt connection. A coupling 24 is arranged inside the sleeve, one end of the coupling 24 is connected to the extended shaft of the servo motor 27, and the other end is connected to one end of the stepped shaft 20. The stepped shaft is supported by a tapered roller bearing 21, and the tapered roller bearing 21 is installed face to face. The outer rings of the two bearings are It is fixed by a bearing sleeve 22, the upper inner ring of the bearing supports the stepped shaft 20, and the lower bearing is supported by a flange 23 connected to the stepped shaft 20. The uppermost part of the stepped shaft 20 is provided with an induction gasket 19 and a pneumatic chuck 18. The induction gasket 19 is used to sense whether there is a sample clamped. The pneumatic chuck 18 can realize that the interface of the pneumatic circuit does not participate in the rotation, while the chuck can rotate. The matched spring chuck 17 is inserted into the pneumatic chuck 18, and the pneumatic chuck 18 clamps and loosens the spring chuck 17 according to the opening and closing of the pneumatic control valve. In the top device, the top wheel 29 is fixed to the top plate 30 by a pin 28 and an open retaining ring 31. The end of the top plate 30 is connected to the T-type support seat 32 by bolts, and the T-type support seat 32 is fixed to the turntable 12. The existence of the top device can prevent the sample from being deformed after grinding and polishing.

[0030] In the embodiment of the present invention, Figure 5 and Figure 6As shown, the grinding mechanism includes a column 46, a support platform 48, an electric cylinder bottom plate 49, an electric cylinder slider 41, an electric cylinder slide rail 51, an electric cylinder lead screw 52, ​​a lead screw support block 50, a baffle 42, an electric cylinder motor support plate 45, an electric cylinder motor 43, a coupling 44, a flat plate 40, a rib plate 39, a vertical plate 62, an eccentric motor 63, an eccentric wheel 33, a pin B60, an open retaining ring B61, a fisheye bearing 59, a pin A57, an open retaining ring A58, a connecting plate 55, a grinding motor 56, a tightening sleeve 54, a load sensor 37, and a slider 38. , slide rail 35, bearing seat 34, grinding disc 53, grinding fluid box 47, grinding fluid pipe 36, 4 columns 41 are fixed on the frame 12, the support platform is set up, the electric cylinder bottom plate 49 can be adjusted and fixed on the support platform 48, the front, middle and rear of the electric cylinder bottom plate are respectively provided with a screw support block 50, a baffle 42, and an electric cylinder motor support plate 45, which are used to support the electric cylinder screw 52 and fix the electric cylinder motor 45, wherein the coupling 44 is placed between the electric cylinder motor support plate 45 and the baffle 42, connecting the electric cylinder motor 43 extending shaft and the electric cylinder screw 52, ​​the electric cylinder slider 4 1 passes through the electric cylinder lead screw 52 and is placed on the electric cylinder slide rail 51. The electric cylinder motor 43 rotates to drive the electric cylinder slide rail 51 to move forward and backward. The flat plate 40 is fixed to the electric cylinder slide block 41 by screws. The vertical plate 62 fixes the front side of the flat plate 40. The rib plate 39 is used to fix and improve the strength. The eccentric motor 62 and the bearing seat 34 are fixed on the vertical plate 62. The motor 63 extends out of the shaft to connect the eccentric wheel 33. The fisheye bearing 59 is fixed to the eccentric wheel 33 by pin B60 and open retaining ring B61. The other end of the fisheye bearing 59 is fixed by pin A57 and open retaining ring A58. It is fixed on the connecting plate 55. A load sensor 37 is provided between the connecting plate 55 and the electric cylinder slider 41 to record the grinding force and ensure that the grinding force is consistent each time. The grinding motor 56 is fixed on the connecting plate 55. The extended shaft of the grinding motor 56 is fixed to the grinding disc 53 by a tightening sleeve 54, which is convenient for disassembly and assembly. The grinding disc 53 is then fixed to the tightening sleeve 54 by screws. As the eccentric wheel motor 63 rotates, the grinding disc 53 can be driven to move up and down. With the cooperation of the three motors, metal samples of different depths and heights can be ground and polished.

[0031] The working principle of the present invention is as follows: the first sample is inserted into the spring chuck at the first work station, the induction gasket in the spring chuck senses the sample and transmits a signal to the control system, the control system sends an output signal to the motor of the pneumatic chuck and the sample clamping system, so that the chuck contracts, and the sample starts to rotate after being clamped; the motor of the driving mechanism drives the cam divider to rotate through the pulley, so that the turntable rotates intermittently, and there is sufficient time for sample changing and grinding and polishing. When the sample clamping mechanism moves from the first station to the second station driven by the turntable, after the sensor of the grinding mechanism senses the signal, the electric cylinder begins to approach the sample and the grinding fluid spraying mechanism opens. When the rotating grinding disc contacts the sample, the motors of the upper and lower devices and the electric cylinder are operated to achieve grinding and polishing of different heights and depths. The grinding force is recorded by the load sensor of the grinding system to ensure that the grinding effect of different heights and depths is consistent. The grinding time is controlled by the control system, and the time is less than the dwell time of the turntable. After the grinding of the first station is completed, the electric cylinder motor drives the electric cylinder slider to return to the original position, the grinding disc leaves the sample, and the motor stops rotating; the sample then passes through the third and fourth stations in turn. The working principles of the third and 4 stations are the same as those of the second station. The particle sizes of the grinding discs of the second and 3 stations are 400 mesh and 800 mesh respectively, and the fourth station is a woolen polishing disc. After polishing at the fourth station, it returns to the first station, the pneumatic control valve is closed, the motor of the grinding mechanism stops, the pneumatic chuck is opened, the sample is taken out, and the next sample is changed. When the first sample runs to the second station, the second sample starts to be clamped at the first station and runs in sequence.

[0032] This grinding and polishing device can be determined according to the shape and size of the sample. Samples of different heights and shapes require adjustment of the initial position of the grinding disc and the matching spring chuck to achieve our ideal grinding and polishing area.

[0033] The present invention is not limited to the above-mentioned best embodiment. Anyone can derive other various forms of metal sample polishing devices and working methods with automatic adjustment of grinding depth under the enlightenment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A metal sample polishing device with automatic adjustment of grinding depth, characterized in that: It comprises a machine base, a turntable is rotatably connected to the machine base, the lower end of the turntable is driven to rotate and supported by a driving mechanism, a clamping mechanism is evenly distributed along the circumference of the upper end surface of the turntable, a pneumatic chuck for clamping a metal sample is arranged at the top of the clamping mechanism, a grinding mechanism matched with the clamping mechanism is arranged on the outer periphery of the turntable, and the grinding mechanisms are all fixedly connected to the surface of the machine base; The clamping mechanism includes a small servo motor fixedly connected to the lower end of the turntable, the top end of the small servo motor is connected to a stepped shaft via a coupling, the upper end of the stepped shaft passes through the turntable and is rotatably connected to the turntable, the pneumatic chuck is arranged at the top end of the stepped shaft, the side of the pneumatic chuck is provided with a top device, the top device includes a top plate, one end of the top plate is connected to two top wheels for abutting against the side of the metal sample, and the other end of the top plate is supported by a T-shaped support seat and fixed to the turntable; The outer circumference of the stepped shaft is rotatably connected to the turntable via a tapered roller bearing and a bearing sleeve; an induction gasket is also provided at the top of the stepped shaft, and the top of the pneumatic chuck clamps the metal sample via a spring chuck, and the bottom of the metal sample touches the induction gasket when clamped by the spring chuck; the top wheels are connected to the top plate via pins and an open retaining ring, and the two top wheels are spaced apart; The grinding mechanism includes a support table, on which an electric cylinder motor is fixedly arranged, an output end of the electric cylinder motor is connected to an electric cylinder screw and drives an electric cylinder slider to move back and forth horizontally to approach or move away from a clamping mechanism via the electric cylinder screw, a vertically extending vertical plate is fixedly connected to the top of the electric cylinder slider, an eccentric wheel motor is fixedly connected to the side of the top of the vertical plate away from the clamping mechanism, the output end of the eccentric wheel motor passes through the vertical plate and is connected to the eccentric wheel, the other side surface of the eccentric wheel is connected to an L-shaped connecting plate via a fisheye bearing, a slide rail for connecting vertical sliding is vertically arranged on the side of the vertical plate close to the clamping mechanism, a grinding motor is fixedly arranged on the connecting plate, a grinding disc is connected to the lower output end of the grinding motor, and a load sensor is provided on the back of the connecting plate.

2. The metal sample polishing device with automatic adjustment of grinding depth according to claim 1 is characterized in that: The driving mechanism comprises a driving motor, a driving end of the driving motor is connected to a cam divider via a pulley and a synchronous belt, the cam divider is fixed to the machine base, an input end of the cam divider is connected to the pulley, and an output end of the cam divider is connected to the center of the turntable to drive the turntable to rotate.

3. The metal sample polishing device with automatic adjustment of grinding depth according to claim 1, characterized in that: A grinding liquid tank is arranged below the support platform. The grinding liquid tank is connected to a grinding liquid pipe via a water pump. The grinding liquid pipe extends to the side of the grinding disc.

4. The metal sample polishing device with automatic adjustment of grinding depth according to claim 1, characterized in that: The support platform is fixedly provided with an electric cylinder slide rail to which the electric cylinder slider is slidably connected, and the two side ends of the support platform are respectively fixed with a vertically extending support plate and a screw support block, the electric cylinder motor is fixedly connected to the support plate, the end of the electric cylinder screw is rotatably connected to the screw support block and supported by it, the butt end of the electric cylinder screw and the electric cylinder motor is supported by a baffle, the bottom end of the baffle is fixedly connected to the support platform and limits the sliding range of the electric cylinder slider.

5. The metal sample polishing device with automatic adjustment of grinding depth according to claim 1, characterized in that: The top end surface of the electric cylinder slider is fixedly connected with a flat plate, the bottom end of the vertical plate is fixedly connected to the flat plate, and a triangular rib plate is fixedly connected between the vertical plate and the flat plate; the lower end of the support platform is supported by a column, and the column is fixedly connected to the machine base; the output end of the grinding motor is connected to the grinding disc through a tightening sleeve.

6. The metal sample polishing device with automatic adjustment of grinding depth according to claim 1, characterized in that: An electric box is arranged at the bottom of the machine base, a machine cover which houses a turntable, a driving mechanism, a clamping mechanism and a grinding mechanism is fixedly arranged at the upper end of the machine base, a sliding door is arranged at the side end of the machine cover, and a control box which is electrically connected to the electric box, the driving mechanism, the clamping mechanism and the grinding mechanism is also arranged outside the side machine cover.

7. A working method of a metal sample polishing device with automatic adjustment of grinding depth, characterized in that: A metal sample polishing device with automatic adjustment of grinding depth as described in any one of claims 1 to 6 is used, and the following steps are followed: first, the metal sample is inserted into the spring chuck, the induction gasket senses the sample, and the signal is transmitted to the control box, the control box drives the pneumatic chuck of the clamping mechanism to contract, and after the sample is clamped, the driving motor of the driving mechanism drives the cam divider to rotate through the pulley, so that the turntable rotates intermittently to ensure sufficient time for sample replacement and grinding and polishing; when the sample clamping system is driven by the turntable to rotate to the next station, the electric cylinder motor of the grinding mechanism works to move the electric cylinder slider closer to the sample and start the water pump for spraying, when After the rotating grinding disc contacts the sample, the eccentric motor and the electric cylinder motor are used to realize grinding and polishing at different heights and depths, and the grinding force is recorded by the load sensor. The grinding time is less than the dwell time of the turntable. After the grinding is completed at this station, the electric cylinder motor drives the slider back to its original position, the grinding disc leaves the sample, and the eccentric motor stops rotating. The sample is then driven by the driving mechanism to pass through multiple stations for grinding in sequence. The working principles of each station are the same. The particle size of the grinding discs at subsequent stations increases in sequence, and finally resets to the initial station. The control box drives the pneumatic chuck to open, take out the sample, and then change the sample for grinding the next sample.

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