CN109015211B - Metallographic specimen preparation device - Google Patents
Metallographic specimen preparation device Download PDFInfo
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- CN109015211B CN109015211B CN201810971090.7A CN201810971090A CN109015211B CN 109015211 B CN109015211 B CN 109015211B CN 201810971090 A CN201810971090 A CN 201810971090A CN 109015211 B CN109015211 B CN 109015211B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 230000033001 locomotion Effects 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000007667 floating Methods 0.000 claims abstract description 41
- 238000005498 polishing Methods 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 4
- 238000007517 polishing process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 244000137852 Petrea volubilis Species 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
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Abstract
The invention provides a metallographic specimen preparation device which comprises a dividing head rotary motion mechanism, a transverse horizontal reciprocating linear motion mechanism and a vertical reciprocating linear motion mechanism, wherein the dividing head rotary motion mechanism is arranged on the dividing head; the dividing head of the dividing head rotary motion mechanism is in direct contact with the three uniformly distributed floating cylindrical rollers, no coaxiality requirement exists, four small grooves are uniformly distributed on the surface of the outer circle of the dividing head, and the spring pins can be embedded into the small grooves when the dividing head rotates 90 degrees, so that the accurate division of the dividing head on 4 x 90 degrees is realized. The reciprocating linear motion mechanism in the vertical direction drives the ball screw nut pair through the servo motor, the distance of the sliding plate in the vertical direction can be accurately controlled, the grinding amount can be accurately controlled, and the grinding and polishing effects are guaranteed. Horizontal reciprocal linear motion mechanism can make the sample can the full coverage abrasive paper through the extension or the shortening of adjusting the horizontal arm in front, greatly improves abrasive paper's utilization ratio, reduce cost. The device has the advantages of simple mechanism, stable operation, accurate transmission, uniform grinding, high efficiency and good flexibility.
Description
Technical Field
The invention relates to the field of sample preparation devices, in particular to a metallographic sample preparation device.
Background
Metallographic analysis plays an important role in the field of metal material research, and the properties of metal materials can be researched by analyzing the microstructure of the metal materials. With the continuous improvement and development of detection equipment such as a metallographic microscope, an electron microscope and the like, metallographic analysis is gradually promoted to a higher and deeper range. In order to meet the requirements of the development, metal material sampling technology and equipment should be developed correspondingly. The preparation of a sample is an important premise and basis of microstructure detection, and firstly, a sample capable of reflecting the real structure of a detected material is prepared, and a 'pseudo tissue' cannot be formed due to improper operation in the sample preparation process; in addition, the reproducibility of sample preparation is good, the preparation time is as short as possible, and the cost is as low as possible.
At present, the preparation method of the metallographic specimen mainly comprises machine preparation and manual preparation. Compared with manual preparation, the machine for preparing the metallographic specimen has high efficiency, the quality is easy to control, and the requirement on the level of an operator is lower. However, in the process of preparing metallographic samples by machine, some machine devices mainly control the grinding of the sample and the grinding disc by means of cylinder driving, and not only are it difficult to maintain a constant air pressure value, but also the action is delayed: there is a certain time delay from the issuance of the command to the actuation of the actuating cylinder. After the sample is ground for a period of time, part of the preparation machines control the rotary indexing of the sample in a belt transmission mode, the belt transmission has large outer contour size, low transmission efficiency, short service life and low transmission precision, and the indexing precision of the sample and the surface quality of the ground sample are seriously influenced; in addition, in some sample preparation machines, the rotating shaft for controlling the rotation and the indexing of the sample is directly in clearance fit with the machine main body, the fit distance is long, the processing difficulty of the rotating shaft and the machine main body fit shaft hole is increased, and the coaxiality during assembly is difficult to guarantee. In addition, in some existing preparation machines, an independent rough grinding area and an independent fine grinding area are arranged, and samples are ground in the two areas sequentially by rotating the whole sample clamping mechanism, but the samples cannot move transversely, so that the utilization rate of the abrasive paper is reduced; most sample preparation machines connect a sample rotary indexing shaft, a servo motor and a sample chuck through a coupler and are difficult to disassemble, so that the sample preparation machines can only grind samples with specific shapes and sizes in a certain range.
Disclosure of Invention
The invention aims to provide a metallographic specimen preparation device, which creatively provides that a spring pin and 4 uniformly distributed small grooves on the outer circumferential surface of an indexing head form point-surface rolling contact, and 4-90-degree indexing of a grinding specimen can be realized under the manual action; the dividing head contacts with the floating cylindrical rollers of 3 equipartitions, and is fixed with left dividing head fastener and right dividing head fastener, forms high vice contact, does not need the dividing head to have too high machining precision, and the floating cylindrical rollers direct contact of dividing head and 3 equipartitions does not have the axiality requirement. In addition, the invention can greatly improve the utilization rate of the abrasive paper and reduce the cost by controlling the transverse horizontal reciprocating linear motion mechanism of the sample preparation device; the purpose of clamping, grinding and polishing different samples can be achieved by replacing different sample chucks, and the processing flexibility is improved. In addition, in the invention, the whole support of the device is an equilateral triangle formed by 3 guide posts, which ensures the stability of the device, and simultaneously, the servo motor drives the ball screw nut pair to control the sample and the grinding disc to grind, so that the rotary motion of the output shaft of the servo motor is changed into the up-and-down reciprocating linear motion of the sliding plate, the transmission is stable and accurate, and the grinding quality of the surface of the sample is favorably improved. The invention overcomes the problems of poor grinding surface quality, high technical requirement on operators, large accidental factors, low efficiency and difficult flexible processing of the sample in the clamping, grinding and polishing processes.
The technical scheme of the invention is as follows: a metallographic specimen preparation device comprises a dividing head rotary motion mechanism, a transverse horizontal reciprocating linear motion mechanism and a vertical reciprocating linear motion mechanism;
the indexing head rotary motion mechanism comprises a sample chuck, an indexing head fastener, an indexing head and an indexing rotary wrench; the sample chuck is arranged at the lower part of the dividing head, the dividing head fastener is sleeved on the dividing head, a plurality of protruding floating cylindrical rollers are arranged on the inner wall of the dividing head fastener, and the dividing head is connected with a floating cylindrical roller high pair; the outer circle surface of the dividing head is provided with a plurality of grooves, one end of the transverse horizontal reciprocating linear motion mechanism is provided with a spring pin, and the spring pin is connected with a groove high pair; one end of the dividing head fastener is connected with a rotating pair at one end of the transverse horizontal reciprocating linear motion mechanism, and the other end of the transverse horizontal reciprocating linear motion mechanism is connected with the vertical reciprocating linear motion mechanism.
In the scheme, four grooves are formed in the outer circle surface of the dividing head; four grooves are uniformly arranged, and the interval between every two adjacent grooves is 90 degrees.
In the above scheme, the indexing head fastener comprises a left indexing head fastener and a right indexing head fastener;
one end of the left indexing head fastener and one end of the right indexing head fastener are respectively connected with a revolute pair at one end of the transverse horizontal reciprocating linear motion mechanism; the other end of the left dividing head fastener is detachably connected with the other end of the right dividing head fastener.
In the above scheme, the number of the floating cylindrical rollers is three, and the three floating cylindrical rollers are uniformly distributed and adjacent to each other by 120 degrees.
In the above scheme, the indexing head is provided with an indexing rotary wrench; the indexing rotary wrench is in threaded connection with the indexing head.
In the above scheme, the transverse horizontal reciprocating linear motion mechanism comprises a front transverse arm, a linear guide rail pair, a rear transverse arm and a locking bolt; the front transverse arm is connected with the rear transverse arm through a linear guide rail pair;
one end of the locking bolt penetrates through the threaded hole of the rear transverse arm to be in contact with the surface of the front transverse arm.
In the above scheme, the vertical reciprocating linear motion mechanism comprises a servo motor, an upper base plate, a plurality of guide pillars, a sliding plate, a guide sleeve, a ball screw, a thrust ball bearing, a bearing seat and a lower base plate;
the servo motor is arranged on the upper bottom plate, an output shaft of the servo motor is connected with one end of a ball screw through a coupler, the other end of the ball screw penetrates through the sliding plate and is connected with a bearing seat through a thrust ball bearing, and the bearing seat and the lower bottom plate are in interference fit; one end of the guide post is connected with the upper bottom plate through a connecting flange, and the other end of the guide post penetrates through the sliding plate and is connected with the lower bottom plate through the connecting flange; the guide post is in clearance fit with the guide sleeve, and the guide sleeve is connected with the sliding plate through a bolt; the ball screw is in threaded fit with a ball screw nut arranged on the sliding plate; the sliding plate is connected with a transverse horizontal reciprocating linear motion mechanism.
In the scheme, the number of the guide columns is three, the three guide columns are distributed in an equilateral triangle, and the ball screw is positioned in the middle of the equilateral triangle.
In the above scheme, the sample chuck is detachably mounted at the lower part of the dividing head.
In the scheme, the device further comprises a control unit; the control unit is connected with the servo motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the rotary motion mechanism of the dividing head comprises three floating cylindrical rollers, the dividing head is in direct contact with the three uniformly distributed floating cylindrical rollers, and the coaxiality requirement is avoided, so that the stability and the rotation of the dividing head are ensured, four small grooves are uniformly distributed on the surface of the excircle of the dividing head, the spring pins can be embedded into the small grooves when the indexing head rotates 90 degrees, the accurate division of the dividing head on 4 x 90 degrees is realized, mutually orthogonal uniform grids can be formed on a grinding surface, and the surface quality of a sample can be improved.
2. According to the vertical reciprocating linear motion mechanism, the servo motor drives the ball screw nut pair, the up-and-down reciprocating linear motion process of the sliding plate is controlled by the control unit driving the servo motor, the distance of the sliding plate in the vertical direction can be accurately controlled, the grinding amount is accurately controlled, and the grinding and polishing effects are guaranteed.
3. The transverse horizontal reciprocating linear motion mechanism can enable a sample to completely cover abrasive paper by adjusting the extension or the shortening of the front transverse arm, greatly improves the utilization rate of the abrasive paper and reduces the cost.
4. The invention can achieve the purpose of clamping, grinding and polishing different samples by replacing different sample chucks and improve the processing flexibility.
5. The sample chuck is detachably arranged at the lower part of the dividing head, and samples in different shapes can be clamped by replacing different sample chucks.
6. The three guide posts are distributed in an equilateral triangle to improve the stability of the device in the operation process.
7. The metallographic specimen preparation device has the advantages of simple mechanism, low cost, stable operation, accurate transmission, uniform grinding and high efficiency, and reduces the technical requirements on operators.
Drawings
Fig. 1 is a schematic view of a metallographic sample preparation apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a metallographic sample preparation apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic view of the rotary motion mechanism a of the index head in fig. 1.
Fig. 4 is a schematic view of a floating cylindrical roller structure according to an embodiment of the present invention.
Fig. 5 is a perspective view illustrating a floating cylindrical roller structure according to an embodiment of the present invention.
Fig. 6 is a sectional view of a floating cylindrical roller structure according to an embodiment of the present invention.
FIG. 7 is a schematic view of B-B in FIG. 6.
Fig. 8 is a side view of a lateral horizontal reciprocating linear motion mechanism in accordance with an embodiment of the present invention.
Fig. 9 is a top view of a lateral horizontal reciprocating linear motion mechanism in accordance with an embodiment of the present invention.
Fig. 10 is a perspective view of a vertical reciprocating linear motion mechanism according to an embodiment of the present invention.
In the drawings, 1 — a sample chuck; 2-a chuck wrench; 3-locking bolt of indexing head fastener; 4-left index head fastener; 5-dividing head, 6-dividing rotary spanner; 7-dividing head fastener connecting bolt, 8-front transverse arm; 9-linear guide rail pair; 10-locking bolt; 11-rear transverse arm; 12-lower piece of coupler; 13-coupler upper piece; 14-a servo motor; 15-motor locking bolt; 16-a motor support; 17-locking bolts of the upper bottom plate; 18-upper base plate; 19-a connecting flange; 20, guiding a column; 21-ball screw nut; 22-a slide plate; 23, a guide sleeve; 24-ball screw; 25-a stop cover; 26-a thrust ball bearing; 27-a bearing seat; 28-lower base plate; 29-a spring pin; 30-right indexing head fastener; 31-floating cylindrical rollers; 32-flange cup bearing; 33, fixing blocks; 34-a return spring; 35-floating cylindrical roller support; 36-control unit.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and detailed description, but the scope of the present invention is not limited thereto.
Fig. 1 and 2 show an embodiment of the apparatus for preparing a metallographic sample according to the present invention, which includes a rotary motion mechanism of a dividing head, a horizontal reciprocating linear motion mechanism, and a vertical reciprocating linear motion mechanism. One end of the dividing head fastener is connected with one end of the transverse horizontal reciprocating linear motion mechanism, and the other end of the transverse horizontal reciprocating linear motion mechanism is connected with the vertical reciprocating linear motion mechanism.
The indexing head rotary motion mechanism is used for carrying out 4-90-degree rotary motion on a sample after the sample is clamped, and scratches generated by the sample and abrasive paper in the grinding process can be effectively eliminated. The horizontal distance of a front horizontal arm in the device is adjusted by the horizontal reciprocating linear motion mechanism, so that the sample can cover any position of the sand paper. The vertical reciprocating linear motion mechanism is converted into linear motion of the ball screw nut pair through the rotary motion of the output shaft of the servo motor, and the linear distance of the sample in the vertical direction in the grinding and polishing processes is accurately controlled.
As shown in fig. 3, 4 and 5, the index head rotary motion mechanism includes a sample chuck 1, a chuck wrench 2, an index head fastener locking bolt 3, a left index head fastener 4, a right index head fastener 30, an index head 5, an index rotary wrench 6, a spring pin 29, a plurality of floating cylindrical roller structures, an index head fastener connecting bolt 7, a flange cup bearing 32, a fixed block 33, a return spring 34, and a floating cylindrical roller support 35.
The sample chuck 1 is detachably connected with the index head 5 through a bolt, the jaw is adjusted through rotating the chuck wrench 2, so that a sample is clamped, and the chuck wrench 2 has enough clearance with the chuck and can be taken down from the sample chuck 1. The indexing head fastener consisting of the left indexing head fastener 4 and the right indexing head fastener 30 is sleeved on the indexing head 5, one end of the left indexing head fastener 4 and one end of the right indexing head fastener 30 form a revolute 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 rotate within a certain range; after the index head 5 is placed in the proper position, the index head 5 is fixed with the left index head fastener 4 and the right index head fastener 30 by the index head fastener locking bolt 3. The outer circle surface of the dividing head 5 is provided with four uniformly distributed grooves, and the interval between every two adjacent grooves is 90 degrees. When the index head 5 is rotated, the spring pin 29 can form a high pair in point-surface contact with one of the grooves, the tip of the spring pin 29 is a rolling body and forms rolling friction with the groove, and 4-90-degree indexing can be realized.
As shown in fig. 6 and 7, the number of the floating cylindrical roller structures in this embodiment is three, and the floating cylindrical roller structures include a floating cylindrical roller 31, a flange cup bearing 32, a fixed block 33, a return spring 34, and a floating cylindrical roller support 35. The floating cylindrical roller 31 may float in the direction of the return spring 34. In this embodiment, one floating cylindrical roller 31 is mounted on the left indexing head fastener 4, two floating cylindrical rollers 31 are mounted on the right indexing head fastener 30, the three floating cylindrical rollers 31 are uniformly distributed, the angle between two adjacent floating cylindrical rollers 31 is 120 degrees, and the indexing head 5 and the three floating cylindrical rollers 31 form high pair contact. The indexing head 5 is provided with an indexing rotary wrench 6; the indexing rotary wrench 6 is connected to the indexing head 5 by a screw thread and can be removed from the indexing head.
The transverse horizontal reciprocating linear motion mechanism comprises a front transverse arm 8, a linear guide rail pair 9, a rear transverse arm 11 and a locking bolt 10.
As shown in fig. 8 and 9, the transverse horizontal reciprocating linear motion mechanism comprises a front transverse arm 8, a linear guide rail pair 9, a rear transverse arm 11 and a locking bolt 10; the front transverse arm 8 is connected with the rear transverse arm 11 through a linear guide rail pair 9; one end of the locking bolt 10 passes through the threaded hole of the rear transverse arm 11 to be in contact with the surface of the front transverse arm 8.
The inner wall of the rear transverse arm 11 is provided with a fixed plate, a slide block of the linear guide pair 9 is connected with the fixed plate through a bolt, the front transverse arm 8 is connected with a guide rail of the linear guide pair 9 through a bolt, the front transverse arm 8 and the rear transverse arm 11 are driven to move relatively through the movement of the slide block of the linear guide pair 9 and the guide rail, and the locking bolt 10 is screwed down after the front transverse arm 8 and the rear transverse arm 11 are adjusted to a proper position to fix the relative positions of the front transverse arm 8 and the rear transverse arm 11. The front transverse arm 8 and the rear transverse arm 11 are connected through the linear guide rail pair 9, so that the stability of transverse horizontal movement of a sample in the grinding or polishing process can be ensured; the front transverse arm 8 and the rear transverse arm 11 are fixed by means of a locking bolt 10. So that the contact with the surface of the front transverse arm 8 is controlled by screwing in or out the locking bolt 10; when the two are in contact, the front transverse arm 8 is fixed by utilizing the locking force between the screw thread matching, otherwise, the front transverse arm 8 can move.
As shown in fig. 10, the vertical reciprocating linear motion mechanism includes a coupler, a servo motor 14, a motor locking bolt 15, a motor bracket 16, an upper base plate locking bolt 17, an upper base plate 18, a connecting flange 19, a guide post 20, a ball screw nut 21, a slide plate 22, a guide sleeve 23, a ball screw 24, a stop cover 25, a thrust ball bearing 26, a bearing seat 27, a lower base plate 28 and a control unit 36. The coupler comprises a coupler upper piece 13 and a coupler lower piece 12.
The servo motor 14 is fixed with the motor support 16 through a motor locking bolt 15, an output shaft of the servo motor 14 is connected with one end of a ball screw 24 through a coupler upper piece 13 and a coupler lower piece 12, the other end of the ball screw 24 penetrates through a sliding plate 22 and is connected with a bearing seat 27 through a thrust ball bearing 26, and the bearing seat 27 and a lower bottom plate 28 are in interference fit; one end of the guide post 20 is connected with the upper bottom plate 18 through a connecting flange 19, and the other end of the guide post 20 passes through the sliding plate 22 and is connected with 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 in bolt connection with the sliding plate 22; the ball screw 24 is in threaded fit with a ball screw nut 21 mounted on the slide plate 22; the slide plate 22 is connected with the rear transverse arm 11 of the transverse horizontal reciprocating linear motion mechanism. The control unit 36 is connected to the servomotor 14. The up-and-down reciprocating linear motion process of the sliding plate is controlled by a servo motor driven by a control unit.
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 changed into the up-and-down reciprocating linear motion of the sliding plate 22 through a screw nut pair formed by the ball screw 24 and the ball screw nut 21, and the control unit 36 can accurately control the servo motor 14, so that the up-and-down reciprocating motion distance of the sample in the grinding and polishing processes is accurately controlled; the three guide posts 20 are connected with the upper bottom plate 18 through a connecting flange 19, the guide posts 20 are in interference fit with the connecting flange 19, and the three guide posts 20 are distributed in an equilateral triangle; the three guide posts 20 respectively penetrate through the three guide sleeves 23 to form clearance fit, and the three guide sleeves 23 are connected with the sliding plate 22 through bolts; the ball screw 24 is matched with the ball screw nut 21, the ball screw nut 21 and the sliding plate 22 are fixed by bolts, and one end of the ball screw 24 penetrates through the upper base plate 18 and is connected with the lower coupling piece 12; there is the mounting hole on the lower plate 28 to be convenient for install whole device on other equipment, the other end of three guide pillars 20 is connected through three flange 19 respectively with lower plate 28, guide pillar 20 is interference fit with flange 19, ball 24 passes through thrust ball bearing 26 and is connected with bearing frame 27, fender lid 25 is located thrust ball bearing 26's top, and pass ball 24 and can dismantle with bearing frame 27 and be connected, prevent under the operating mode strip, dust or foreign matter enter into thrust ball bearing 26, bearing frame 27 is interference fit with lower plate 28, slide 22 links together through the welded form with back horizontal arm 11.
The steps of clamping, grinding and polishing the sample by using the method specifically comprise:
the method comprises the following steps: selecting a proper sample chuck 1 according to the size and shape of a grinding and polishing sample, connecting the sample chuck 1 with an index head 5 through a bolt, adjusting the position of the sample in the sample chuck 1 to ensure that the sample has enough grinding and polishing length, and rotating a chuck wrench 2 to clamp the sample;
step two: adjusting the dividing head 5 to enable the spring pin 29 to be in contact with 1 small groove in the dividing head 5, and adjusting the locking bolt 3 of the dividing head fastener to enable the three floating cylindrical rollers 31 to be in compact contact with the dividing head 5;
step three: adjusting the front transverse arm 8 to enable the test sample to be at a reasonable position for grinding the abrasive paper, and locking the locking bolt 10;
step four: checking whether the rotation of the ball screw nut 21 and the ball screw 24 is abnormal;
step five: the operation control unit 36 drives the program to return the slide plate 22 to zero;
step six: in normal operation, the slide plate 22 quickly reaches a safe position away from the abrasive paper by a certain distance, then the sample is fed slowly, and when the sample is contacted with the abrasive paper, the reasonable grinding feeding amount can be determined according to the initial surface condition of the sample; meanwhile, setting the time of single grinding and the total grinding time;
step seven: after the sample is ground to a set single time, quickly lifting the sliding plate 22, manually rotating the indexing rotary wrench 6, continuously descending after rotating for 90 degrees, continuously grinding, after the single time set for grinding is reached, quickly lifting the sliding plate 22, manually rotating the indexing rotary wrench 6, and further rotating for 90 degrees, so as to push in until the set total time is ground;
step eight: after the sample grinding stage is finished, polishing the sample, and repeating the step seven;
step nine: and after finishing polishing, observing whether the surface quality meets the requirements, if so, replacing the sample and continuing grinding, if not, placing the original sample in the sample chuck 1, and repeating the seventh step and the eighth step.
The invention can accurately control the grinding amount and ensure that good grinding and polishing effects are obtained; the sand paper is fully covered, so that the utilization rate of the sand paper is greatly improved, and the cost is reduced.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A metallographic specimen preparation device is characterized by comprising a dividing head rotary motion mechanism, a transverse horizontal reciprocating linear motion mechanism and a vertical reciprocating linear motion mechanism;
the indexing head rotary motion mechanism comprises a sample chuck (1), an indexing head fastener, an indexing head (5), a plurality of floating cylindrical roller structures and an indexing rotary wrench (6); the sample chuck (1) is arranged at the lower part of the dividing head (5), the dividing head fastener is sleeved on the dividing head (5), and a plurality of protruding floating cylindrical rollers (31) are arranged on the inner wall of the dividing head fastener; the outer circle surface of the dividing head (5) is provided with four grooves, one end of the transverse horizontal reciprocating linear motion mechanism is provided with a spring pin (29), and the spring pin (29) is connected with a groove high pair; one end of the dividing head fastener is connected with one end of the transverse horizontal reciprocating linear motion mechanism, and the other end of the transverse horizontal reciprocating linear motion mechanism is connected with the vertical reciprocating linear motion mechanism;
the transverse horizontal reciprocating linear motion mechanism comprises a front transverse arm (8), a linear guide rail pair (9), a rear transverse arm (11) and a locking bolt (10); the front transverse arm (8) is connected with the rear transverse arm (11) through a linear guide rail pair (9); one end of the locking bolt (10) passes through the threaded hole of the rear transverse arm (11) to be in contact with the surface of the front transverse arm (8);
the four grooves are uniformly arranged, and the interval between every two adjacent grooves is 90 degrees; the indexing head fastener comprises a left indexing head fastener (4) and a right indexing head fastener (30); one end of the left indexing head fastener (4) and one end of the right indexing head fastener (30) are respectively connected with a revolute pair at one end of the transverse horizontal reciprocating linear motion mechanism; the other end of the left dividing head fastener (4) is detachably connected with the other end of the right dividing head fastener (30);
the floating cylindrical roller structure comprises a floating cylindrical roller (31), a flange cup type bearing (32), a fixed block (33), a return spring (34) and a floating cylindrical roller support (35); the two ends of the floating cylindrical roller (31) are respectively installed on a fixed block (33) through flange cup type bearings (32), the fixed block (33) is installed on a floating cylindrical roller support (35), a return spring (34) is arranged in the floating cylindrical roller support (35), the return spring (34) is connected with the fixed block (33), and the floating cylindrical roller (31) can float along the telescopic direction of the return spring (34); a 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), the three floating cylindrical rollers (31) are uniformly distributed, the angle between every two adjacent floating cylindrical rollers (31) is 120 degrees, and the indexing head (5) and the three floating cylindrical rollers (31) form high pair contact;
the vertical reciprocating linear motion mechanism comprises a servo motor (14), an upper base plate (18), a plurality of guide posts (20), a sliding plate (22), a guide sleeve (23), a ball screw (24), a thrust ball bearing (26), a bearing seat (27) and a lower base plate (28); the servo motor (14) is arranged on the upper base plate (18), an output shaft of the servo motor (14) is connected with one end of a ball screw (24) through a coupler, the other end of the ball screw (24) penetrates through a sliding plate (22) and is connected with a bearing seat (27) through a thrust ball bearing (26), and the bearing seat (27) is in interference fit with a lower base plate (28); one end of the guide post (20) is connected with the upper bottom plate (18) through a connecting flange (19), and the other end of the guide post (20) penetrates through the sliding plate (22) and is connected with 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 in bolt connection with the sliding plate (22); the ball screw (24) is in threaded fit with a ball screw nut (21) arranged on the sliding plate (22); the sliding plate (22) is connected with a transverse horizontal reciprocating linear motion mechanism.
2. Metallographic specimen preparation arrangement according to claim 1, characterised in that an indexing rotary wrench (6) is provided on the indexing head (5); the indexing rotary wrench (6) is in threaded connection with the indexing head (5).
3. Metallographic specimen preparation device according to claim 1, characterised in that said guide posts (20) are three in number, said three guide posts (20) being distributed in an equilateral triangle, said ball screw (24) being located in the middle of said equilateral triangle.
4. Metallographic specimen preparation arrangement according to claim 1, characterised in that the specimen chuck (1) is removably mounted in the lower part of the index head (5).
5. Metallographic specimen preparation arrangement according to claim 1, characterized by further comprising a control unit (36); the control unit (36) is connected with the servo motor (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810971090.7A CN109015211B (en) | 2018-08-24 | 2018-08-24 | Metallographic specimen preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810971090.7A CN109015211B (en) | 2018-08-24 | 2018-08-24 | Metallographic specimen preparation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109015211A CN109015211A (en) | 2018-12-18 |
| CN109015211B true CN109015211B (en) | 2020-11-20 |
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| FR2229499A1 (en) * | 1973-05-18 | 1974-12-13 | Jauffres Jacques | Universal bench type machine tool for boring etc - has rotatable chuck head and compound tool post with cutter spindle |
| CN203281989U (en) * | 2013-04-23 | 2013-11-13 | 池州市三力精工机械有限公司 | Simple indexing device |
| CN104354071A (en) * | 2014-11-10 | 2015-02-18 | 重庆蓝黛动力传动机械股份有限公司 | Indexing mechanism |
| CN206281695U (en) * | 2016-12-19 | 2017-06-27 | 陕西理工学院 | A kind of metallographic specimen polishing device |
| CN207616094U (en) * | 2017-12-18 | 2018-07-17 | 王金培 | Numerical control drilling-milling tapper |
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Effective date of registration: 20240829 Address after: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee after: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. Country or region after: China Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University Country or region before: China |
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