Metallographic sample grinding and polishing auxiliary holding device

Abstract

The present application relates to a metallographic sample grinding and polishing auxiliary holding device, belonging to the field of metallographic analysis. The device comprises a transparent observation plastic sheet, a hand-held sleeve, a clamping device, an auxiliary clamping sleeve, a clamping seat, steel balls and a top column. The spherical groove is opened on the outer top of the hand-held sleeve, and the transparent observation plastic sheet is adhered to the hand-held sleeve. The steel balls are built-in, and the position of the steel balls in the spherical groove can be observed to assist the leveling process in the manual coarse grinding process. The clamping seat is provided with cylindrical recesses of different sizes, which can be used for assisting the sample clamping process in the coarse grinding process. The top column is cylindrical, which is used to prevent the sample from sliding tangentially in the manual coarse grinding process. Compared with the traditional additive inlaying process, the device solves the problem of difficulty in separating the sample from the inlaying material after grinding and polishing, and also solves the problem of no auxiliary leveling in manual coarse grinding. The present application can be used for manual coarse grinding, machine fine grinding and polishing processes at the same time, can effectively replace the inlaying step of the sample, is more convenient to hold and disassemble, and reduces the probability of inclination of the grinding and polishing surface after grinding and polishing.

Description

Technical Field

[0001] This invention relates to an auxiliary holding device for metallographic sample grinding and polishing, belonging to the field of metallographic analysis. Background Technology

[0002] As a microstructure analysis technique in materials science, metallographic analysis helps researchers gain a deeper understanding and analysis of the grain size, dimensions, distribution, and phase boundaries of materials, providing strong microstructure support for the study of the macroscopic mechanical properties of materials. Therefore, preparing samples that meet observation standards is of great significance for metallographic analysis. The preparation of metallographic samples generally involves four main steps: cutting and sampling, grinding, polishing, and etching. Typically, the grinding and polishing process requires the sample to be held directly by hand, which places high demands on the experience and skills of the preparer. When the sample size is small, it is difficult to hold the sample firmly with just fingers, often resulting in problems such as the sample flying out or fingers slipping and rubbing against the fingers, leading to uneven sample surfaces, incomplete scratches, and other phenomena that significantly affect microscopic observation. Furthermore, for additive mounting of samples, after polishing, it is often necessary to remove the sample from the mount, but this process is difficult, and the hot mounting process poses certain safety hazards.

[0003] In view of the above, a convenient and easy-to-use metallographic sample grinding and polishing auxiliary holding device is designed, which can effectively improve the efficiency of sample preparation and reduce safety hazards during operation. Summary of the Invention

[0004] This invention designs an auxiliary holding device for metallographic sample grinding and polishing, which facilitates holding the metallographic sample during grinding and polishing, makes the clamping and disassembly process quick and convenient, ensures that the polished surface of the sample is flat and smooth, and improves the sample yield and sample preparation efficiency.

[0005] To achieve the above objectives, this invention designs an auxiliary holding device for metallographic sample grinding and polishing. The device consists of seven parts: a transparent observation plastic sheet, a handheld sleeve, a clamping device, an auxiliary clamping sleeve, a clamping base, steel balls, and a top post. Except for the transparent observation plastic sheet and the steel balls, the rest are 3D printed parts using PLA. Compared to the traditional additive mounting process, this invention solves the problem of difficulty in separating the sample from the mounting material after grinding and polishing, and also solves the problem of maintaining a level polished surface during manual rough grinding. This invention can be used simultaneously for manual rough grinding as well as machine fine grinding and polishing processes, effectively replacing the mounting step for cylindrical samples, and is easier to hold and disassemble, reducing the probability of tilting of the polished surface after grinding and polishing.

[0006] When the diameter of the through hole of the clamping device is larger than the diameter of the sample, an auxiliary clamping sleeve with the same inner diameter as the sample diameter can be added to achieve the clamping of cylindrical samples of various sizes.

[0007] The non-fitting part of the clamp is designed to be elliptical, which can limit the position of the fingers, effectively prevent the fingers from being scratched during the polishing process, improve the grip stability, and facilitate the disassembly of the parts after polishing.

[0008] The clamping base can effectively assist the clamping process during rough grinding. The reserved cylindrical groove allows the sample surface to be ground to protrude from the bottom surface of the clamping sleeve, which is conducive to the sample being fully ground during the rough grinding process.

[0009] Among them, observing the position of the steel ball in the spherical groove can effectively assist in the leveling process during manual rough grinding;

[0010] The top column can effectively prevent the sample from sliding tangentially within the clamp due to excessive force during manual rough grinding.

[0011] As described above, the present invention provides a metallographic sample grinding and polishing auxiliary holding device for the preparation of cylindrical metallographic samples, which not only eliminates the sample additive mounting process, but also provides a good auxiliary function for the manual rough grinding process. Attached Figure Description

[0012] To better illustrate the usage method and technical solution of the present invention, the accompanying drawings will be briefly described in conjunction with the embodiments and related technical solutions.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a front view of the present invention;

[0015] Figure 3 For the purposes of this invention Figure 2 A half-section diagram of line AA in the middle.

[0016] 1-Transparent observation plastic sheet, 2-Handheld sleeve, 3-Clamping device, 4-Auxiliary clamping sleeve, 5-Clamping base, 6-Sample, 7-Top column, 8-Steel ball. Detailed Implementation

[0017] This invention designs a metallographic sample grinding and polishing auxiliary holding device. For usage of this embodiment, please refer to [link / reference needed]. Figure 1 , Figure 2 as well as Figure 3The image contains the following eight parts: 1-Transparent observation plastic sheet, 2-Handheld sleeve, 3-Clamping device, 4-Auxiliary clamping sleeve, 5-Clamping base, 6-Sample, 7-Top column, 8-Steel ball. The 1-Transparent observation plastic sheet is a circular transparent plastic lens; the 2-Handheld sleeve is cylindrical on the outside with a spherical groove at the top and a frustum shape on the inside; the 3-Clamping device, where it interlocks with the 2-Handheld sleeve, is frustum-shaped on the outside, with a cylindrical through hole tangentially to the frustum and a tangential expansion joint at the edge, and an elliptical end; the 4-Auxiliary clamping sleeve is a cylinder with a tangential expansion joint; the 5-Clamping base has cylindrical grooves of different diameters to allow the sample surface to protrude from the bottom of the clamping sleeve during clamping, facilitating thorough grinding during rough grinding; the 7-Top column is a cylinder that provides support during manual rough grinding. The inner wall of the 2-hand sleeve is fitted with the outer wall of the 3-clamping device's truncated cone-shaped fitting part. The cylindrical through hole of the 3-clamping device is fitted with the outer wall of the cylindrical 4-auxiliary clamping sleeve. The 6-sample is placed inside the 4-auxiliary clamping sleeve. All fitting is achieved by externally applied pressure and by the structural properties of the material itself.

[0018]

Example 1

[0019] For manual rough grinding, place the sample (6-) into the appropriately sized cylindrical groove on the clamping base (5-), and place the top post (7-) on top of the sample (6-). Then, sequentially attach the auxiliary clamping sleeve (4-) and the clamping device (3-). Finally, place the hand-held sleeve (2-) on top of the clamping device (3-) and press its upper surface to tighten the structure, thus completing the sample clamping. For finishing, simply hold the side edge of the hand-held sleeve (2-) with one hand to complete subsequent rough and fine grinding on sandpaper. After grinding, hold the outer edge of the hand-held sleeve (2-) with one hand and the oval edge of the clamping device with the other, and twist in opposite directions to easily disassemble the device, then remove the sample.

[0020]

Example 2

[0021] When polishing a sample using a grinding and polishing machine, place the sample (6-) on the flat surface of the clamping base (5-). Then, slip the auxiliary clamp (4-) over the sample, followed by the clamp (3-). Next, place the hand-held sleeve (2-) over the clamp (3-) and press its upper surface to tighten the structure, thus completing the assembly of the device. For fine grinding and polishing, simply hold the side edge of the hand-held sleeve (2-) with one hand. After fine grinding and polishing, hold the outer edge of the hand-held sleeve (2-) with one hand and the oval edge of the clamp (2-) with the other, and twist in opposite directions to easily disassemble the device, allowing you to remove the sample.

[0022]

Example 3

[0023] When the diameter of sample 6 is approximately equal to or equal to the inner diameter of clamping sleeve 3, the installation process is the same as that in Example 1 and Example 2, except that the auxiliary clamping sleeve 4 does not need to be installed.

[0024] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A metallographic sample polishing auxiliary holding device, characterized in that... The structure consists of a transparent observation plastic sheet, a handheld sleeve, a clamping device, an auxiliary clamping sleeve, a clamping base, steel balls, and a top post. The transparent observation plastic sheet is a circular transparent plastic lens. The handheld sleeve is cylindrical on the outside, with a spherical groove at its top containing a steel ball, and the transparent observation plastic sheet is positioned at the top of the groove. The clamping device, where it engages with the handheld sleeve, is frustum-shaped, with a cylindrical through-hole tangentially to the frustum and an expansion joint at the edge; the end is approximately elliptical. The clamping base has cylindrical grooves of different diameters to assist in the clamping process during rough grinding. The auxiliary clamping sleeve is a cylinder with a tangential expansion joint; the top column is a cylinder; the frustum-shaped inner wall of the handheld sleeve fits into the frustum-shaped outer wall of the clamping device; the cylindrical through hole of the clamping device fits into the outer wall of the cylindrical auxiliary clamping sleeve; the polished sample is placed inside the auxiliary clamping sleeve; the top column is placed between the top surface of the polished sample and the inner top wall of the handheld sleeve; all fitting is achieved by externally applied pressure and the structural properties of the material itself; by observing the position of the steel ball in the spherical groove, the leveling process during manual rough grinding can be effectively assisted.

2. The metallographic sample polishing auxiliary holding device as described in claim 1, characterized in that... When the diameter of the polished sample is smaller than the diameter of the through hole of the clamping device, the sample can be clamped by replacing the auxiliary clamping sleeve with a different inner diameter of the through hole; when the diameter of the polished sample is the same as the diameter of the through hole of the clamping device, the polished sample can be placed directly in the through hole of the clamping device.

3. The metallographic sample polishing auxiliary holding device as described in claim 1, characterized in that... The non-fitting part of the clamp is designed in an elliptical shape, which can limit the movement of the fingers, effectively prevent the fingers from being scratched during the polishing process, improve the grip stability, and facilitate the disassembly of the parts after polishing.

4. The metallographic sample polishing auxiliary holding device as described in claim 1, characterized in that... During manual rough grinding, the top column can effectively prevent the sample from sliding axially within the clamp due to excessive force.

5. The metallographic sample polishing auxiliary holding device as described in claim 1, characterized in that... The clamping base is provided with cylindrical grooves of different sizes, which can be used to assist in the sample clamping process during rough grinding, so that the sample surface to be ground protrudes from the bottom of the clamping sleeve, making it easier to finish the rough grinding.

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