CN109822429B - Vibration polishing machine for preparing metal electron back scattering diffraction sample - Google Patents
Vibration polishing machine for preparing metal electron back scattering diffraction sample Download PDFInfo
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- CN109822429B CN109822429B CN201910274044.6A CN201910274044A CN109822429B CN 109822429 B CN109822429 B CN 109822429B CN 201910274044 A CN201910274044 A CN 201910274044A CN 109822429 B CN109822429 B CN 109822429B
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Abstract
The invention provides a vibratory polisher for preparing a metal electron back scattering diffraction sample, and belongs to the technical field of mechanical polishing and metallographic phase preparation. The local vibration polishing machine, the border position of polishing dish is through a plurality of spring coupling bases, the central point of polishing dish lower extreme puts fixed connection center pin, one side of the lower extreme assembly connection base of center pin, set up on the center pin and follow the driving wheel, leave the interval between follow driving wheel and the polishing dish, the inboard of exciting wheel sets up interior drive groove, interior drive groove power is connected from the driving wheel, the axis of exciting wheel and the axis eccentric arrangement of center pin, the outside of exciting wheel sets up outer drive groove, the opposite side assembly driving motor of base, driving motor's output shaft sets up the drive wheel, the outside of drive wheel sets up the main drive groove, main drive groove and outer drive groove are through elastic belt power connection. The invention has the beneficial effects that: the polishing quality is high, a metallographic specimen without a micro deformation layer can be obtained, and the polishing device is simple in structure, low in cost and convenient to maintain.
Description
Technical Field
The invention relates to the technical field of mechanical polishing and grinding and metallographic phase preparation, in particular to a vibratory polisher for preparing a metal electron back scattering diffraction sample without a micro deformation layer.
Background
Microscopic analysis is the most important method for studying the internal structure of metals, and most of the research work in the development history of metallographic science for hundreds of years is done by means of optical microscopy. In recent decades, with the rapid development of material science, higher requirements are put forward on metallographic analysis technology, and there are two main aspects: one is that the magnification is greatly improved so as to observe the details of the internal organization structure of the alloy, and the requirement is solved due to the development of the optical and electron microscope; and secondly, the precise determination of the atomic arrangement type and the microscopic local texture, namely the grain orientation, of various alloy phases is improved, which is a new requirement for quantitative metallographic analysis.
The conventional chemical etching method is based on the principle that a polished surface of an alloy is etched by only depending on a chemical agent to form unevenness of the polished surface, and the structure and phase are identified by using the degree of black and white caused by the difference in the intensity of reflected light, so that the alloy structure information provided by the method is very limited, and the alloy structure profile is enlarged or various artifacts are generated due to etching. In recent years, in the tissue measurement of materials, not only the black-and-white metallographic phase of the microstructure has been limited, but also more and more new technologies have been developed, for example, new electron back scattering diffraction and transmission microscopy technologies have begun to be widely applied, so that not only the result can be more accurate, but also the nanometer size can be enlarged, and more tissue and grain boundary information can be obtained. At the same time, however, higher demands are made on the preparation of the samples. Therefore, in any way, it is very important to prepare a sample surface with no burn, no deformation layer, no oxidation layer, fresh and clean surface and low roughness for correctly displaying the metallographic structure.
The preparation of the test specimens typically includes sampling, mounting, pre-grinding, polishing, and the like. Wherein, the pre-grinding and polishing skills are strong, the time consumption is long, and if the experience is insufficient, the manual sample preparation often cannot meet the ideal requirement. In order to liberate metallographic inspectors from complicated metallographic sample preparation and effectively improve inspection accuracy, many developed countries research the mechanism of polishing machines and push out semi-automatic or full-automatic pre-grinding and polishing equipment. However, the existing imported vibration polishing machine is expensive, complex in structure, high in maintenance cost and inconvenient to popularize and apply. Due to the obvious advantages and wide application of the vibratory finishing machine, the development of the domestic vibratory finishing machine has important significance for improving the situation of low efficiency and low resolution which are long puzzling the preparation of metallographic samples in China.
Disclosure of Invention
The invention aims to provide a vibratory polisher for preparing a metal electron back scattering diffraction sample, which has the advantages of high polishing quality, simple structure, lower cost and convenience in maintenance, and a metallographic sample without a micro deformation layer can be obtained.
The invention provides a vibration polishing machine for preparing a metal electron back scattering diffraction sample, which comprises a base, a polishing disc, a spring, a central shaft, an exciting wheel, an elastic belt and a driving motor, wherein the polishing disc is of a disc-shaped structure, the edge position of the polishing disc is connected with the base through a plurality of springs, the central position of the lower end of the polishing disc is fixedly connected with the central shaft, the lower end of the central shaft is assembled and connected with one side of the base, the plane of the polishing disc is vertical to the axis of the central shaft, a driven wheel is arranged on the central shaft, a space is reserved between the driven wheel and the polishing disc, the axis of the driven wheel is superposed with the axis of the central shaft, the exciting wheel is of a circular structure, an inner driving groove is arranged on the inner side of the exciting wheel, the inner driving groove is in power connection with the driven wheel, the axis of, an output shaft of the driving motor is provided with a driving wheel, a main driving groove is arranged on the outer side of the driving wheel, and the main driving groove and the outer driving groove are in power connection through an elastic belt.
Further, the driven wheel comprises a first annular convex part and a first annular concave part, and the upper end and the lower end of the first annular convex part are provided with the first annular concave part; the inner driving groove comprises a second annular concave part and a second annular convex part, and the upper end and the lower end of the second annular concave part are both provided with the second annular convex part; the first annular bulge is matched with the second annular recess, and the first annular recess is matched with the second annular bulge.
Further, the central shaft and the driven wheel are integrally formed.
Further, the springs are positioned at equal intervals along the edge of the polishing pad.
Further, the lower end of the central shaft is assembled and connected with the base through a bolt.
Furthermore, a radiator is arranged on the base, and the lower end of the central shaft is connected with the radiator.
Compared with the prior art, the vibration polishing machine for preparing the metal electron back scattering diffraction sample has the following characteristics and advantages:
the vibration polishing machine for preparing the metal electron back scattering diffraction sample has the advantages of simple and compact structure, lower cost, convenience in maintenance, operation and control and stable operation; the polishing quality is high, automatic rotary vibration polishing of the sample can be realized, the sample forms a test surface with a uniform, smooth and fresh surface and no micro deformation layer for a back scattering diffraction test, and the test surface cannot be obtained or is difficult to obtain by manual or mechanical polishing.
The features and advantages of the present invention will become more apparent from the detailed description of the invention when taken in conjunction with the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a vibratory finishing machine for preparing a metal electron back scattering diffraction sample according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic partial structure diagram of a vibration polishing machine for preparing a metal electron back scattering diffraction sample according to an embodiment of the present invention;
FIG. 4 is a schematic view of the construction of the central shaft portion of FIG. 3;
FIG. 5 is a schematic structural diagram of the exciting wheel in FIG. 3;
FIG. 6 is a schematic structural diagram of the metal specimen holder, the metal polishing specimen and the metal weight in FIG. 1;
wherein the content of the first and second substances,
1. polishing disk, 2, spring, 3, base, 4, radiator, 5, center pin, 51, first annular bulge, 52, first annular depressed part, 6, exciting wheel, 61, second annular depressed part, 62, second annular bulge, 63, outer drive groove, 7, elastic belt, 8, driving motor, 9, drive wheel, 10, bolt, 11, metal sample anchor clamps, 12, metal polishing sample, 13, metal weight, 14, polishing cloth, 15, polishing cloth fixed disk, 16, clamping screw.
Detailed Description
As shown in fig. 1 to 5, the present embodiment provides a vibratory finishing machine for preparing a metal electron backscatter diffraction sample, which includes a base 3, a polishing disk 1, a spring 2, a central shaft 5, an exciting wheel 6, an elastic belt 7, a driving motor 8, and the like.
The polishing disc 1 is of a disc-shaped structure, the edge position of the polishing disc 1 is connected with the base 3 through twelve springs 2, and the twelve springs 2 are arranged at equal intervals along the edge position of the polishing disc 1. The springs 2 arranged at equal intervals can limit and reset the polishing disk 1 in the swinging operation process. The polishing cloth 14 is laid on the polishing disk 1, the polishing cloth 14 is fixed on the polishing disk 1 through a polishing cloth fixing disk 15, a metal sample clamp 11 is arranged on the polishing cloth 14, and a metal polishing sample 12 is clamped below the metal sample clamp 11 through a clamping screw 16. And a metal weight 13 is placed above the metal sample clamp 11 and used for increasing gravity during polishing.
The center position of the lower end of the polishing disc 1 is fixedly connected with a central shaft 5, and the lower end of the central shaft 5 is assembled and connected with one side of the base 3 through a bolt 10. The lower end of the central shaft 5 is assembled and connected with the base 3 through the bolt 10, when the vibration exciter is used, the vibration exciter 6 is matched with the central shaft 5, and then the central shaft 5 is assembled and connected with the base 3 through the bolt 10, so that the vibration exciter 6 can be conveniently installed and detached.
The base 3 is provided with a radiator 4, and the lower end of the central shaft 5 is connected with the radiator 4. The heat generated during the operation of the vibratory finishing machine can be transferred to the heat sink 4 via the central shaft 5.
The plane of the polishing disc 1 is perpendicular to the axis of the central shaft 5.
The central shaft 5 is provided with a driven wheel, and the central shaft 5 and the driven wheel are integrally formed. A distance is reserved between the driven wheel and the polishing disk 1, and the axis of the driven wheel is overlapped with the axis of the central shaft 5.
The exciting wheel 6 is of a circular ring structure, an inner driving groove is arranged on the inner side of the exciting wheel 6, and the inner driving groove is in power connection with a driven wheel. Specifically, the driven wheel comprises a first annular convex part 51 and a first annular concave part 52, and the upper end and the lower end of the first annular convex part 51 are provided with the first annular concave part 52; the inner driving groove comprises a second annular concave part 61 and a second annular convex part 62, and the upper end and the lower end of the second annular concave part 61 are provided with the second annular convex part 62; the first annular projection 51 cooperates with the second annular recess 61, and the first annular recess 52 cooperates with the second annular projection 52. Therefore, under the action of the elastic belt 7, the exciting wheel 6 can be directly clamped and pressed on the driven wheel of the central shaft 5, and the assembly structure between the exciting wheel 6 and the driven wheel is greatly simplified. In addition, the matching structure of the inner driving groove and the driven wheel is an inner friction roller path structure, so that the linear speed of a friction point between the inner driving groove and the driven wheel can be reduced, and the heat dissipation condition is structurally improved.
The axis of the exciting wheel 6 is arranged eccentrically to the axis of the central shaft 5, and the eccentricity is e.
An outer driving groove 63 is provided on the outer side of the exciting wheel 6. The other side of base 3 assembles driving motor 8, and driving wheel 9 is set up to driving motor 8's output shaft, and the outside of driving wheel 9 sets up the main drive groove, and main drive groove and outer drive groove 63 are through elastic belt 7 power connection.
Because of the driving motor 8 is arranged on the other side of the base 3, the driving motor 8 can be separated from the polishing machine main body, the vibration quality of the polishing machine main body is reduced, the required exciting force is reduced, and the power consumption is reduced.
The vibration polisher for preparing the metal electron back scattering diffraction sample of the embodiment has the following implementation principle: the driving motor 8 drives the exciting wheel 6 to rotate around the central shaft 5 through the elastic belt 7, the exciting wheel 6 applies an inertia force Q (t) to the central shaft 5, and the inertia force Q (t) simultaneously generates a high-frequency horizontal exciting force and an exciting moment M (t). The high-frequency horizontal exciting force finishes polishing the sample on the polishing disk 1, the exciting torque M (t) enables the polishing disk 1 to swing, the exciting torque M (t) enables the sample to generate positive pressure Fn to periodically change, nonlinear change of friction force between the sample and the polishing disk 1 is caused, nonlinear friction is formed, the sample revolves around the center of the polishing disk 1 on the polishing disk 1, and meanwhile, because the radial distance between each point of the polishing surface of the sample and the center of the polishing disk 1 is different, the speed obtained by each point is different, and the sample rotates. The sample revolves and rotates, so that the utilization rate of the abrasive on the polishing disc 1 can be improved, the directionality of the friction marks on the surface of the sample is reduced, and the uniformity of the surface of the sample is ensured. In addition, at the in-process to sample vibration polishing, the heat in time transmits to radiator 4 through center pin 5, avoids heat transfer to the sample on the one hand, influences the microstructure, and on the other hand avoids belt pulley and center pin because of the frictional temperature is too high, and the belt skids.
The vibration polishing machine for preparing the metal electron back scattering diffraction sample has the advantages of simple and compact structure, lower cost, convenience in maintenance, operation and control and stable operation; the polishing quality is high, the automatic rotary vibration polishing of the sample can be realized, the sample forms a test surface with a uniform, smooth and fresh surface and no micro deformation layer for an electron back scattering diffraction test, and the test surface cannot be obtained or is difficult to obtain by manual or mechanical polishing.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a vibratory finishing machine for preparing metal electron back scattering diffraction sample which characterized in that: the polishing disc is of a disc-shaped structure, the edge position of the polishing disc is connected with the base through a plurality of springs, the central position of the lower end of the polishing disc is fixedly connected with the central shaft, the lower end of the central shaft is assembled and connected with one side of the base, the plane where the polishing disc is located is perpendicular to the axis of the central shaft, a driven wheel is arranged on the central shaft, a space is reserved between the driven wheel and the polishing disc, the axis of the driven wheel is overlapped with the axis of the central shaft, the exciting wheel is of a circular structure, an inner driving groove is formed in the inner side of the exciting wheel, the inner driving groove is in power connection with the driven wheel, the axis of the exciting wheel and the axis of the central shaft are arranged in an eccentric mode, an outer driving groove is formed in the outer side of the exciting wheel, the driving motor is assembled on the other side of, the main driving groove and the outer driving groove are in power connection through an elastic belt; the driven wheel comprises a first annular convex part and a first annular concave part, and the upper end and the lower end of the first annular convex part are provided with the first annular concave part; the inner driving groove comprises a second annular concave part and a second annular convex part, and the upper end and the lower end of the second annular concave part are both provided with the second annular convex part; the first annular bulge is matched with the second annular recess, and the first annular recess is matched with the second annular bulge.
2. The vibratory finishing machine for preparing metal electron back-scattering diffraction specimens as claimed in claim 1, wherein: the central shaft and the driven wheel are integrally formed.
3. The vibratory finishing machine for preparing metal electron back-scattering diffraction specimens as claimed in claim 1, wherein: the springs are positioned at equal intervals along the edge of the polishing pad.
4. The vibratory finishing machine for preparing metal electron back-scattering diffraction specimens as claimed in claim 1, wherein: the lower end of the central shaft is assembled and connected with the base through a bolt.
5. The vibratory finishing machine for preparing metal electron back-scattering diffraction specimens as claimed in claim 1, wherein: the base is provided with a radiator, and the lower end of the central shaft is connected with the radiator.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110174425B (en) * | 2019-06-03 | 2021-09-17 | 上海大学 | Sample preparation method and sample structure of wire-shaped sample for EBSD detection |
| CN110834268A (en) * | 2019-12-17 | 2020-02-25 | 济南大学 | Grinding polisher |
| CN114428025B (en) * | 2022-01-04 | 2023-09-26 | 苏州热工研究院有限公司 | Portable internal consumption measuring instrument and internal consumption measuring method |
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| US3990188A (en) * | 1975-05-02 | 1976-11-09 | Roto-Finish Company | Finishing apparatus having gyrational and rotational motion-producing components |
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| EP0488143A1 (en) * | 1990-11-29 | 1992-06-03 | Heinrich Zeidler, Maschinenfabrik GmbH & Co.KG | Method for ceramic wave foot grinding |
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