Metallographic sample preparation jig
By designing a metallographic sample fixture including molds, fixtures and limiting mechanisms, the problems of skewed and fixture wear in the inlay process in the prior art are solved, and the samples maintain verticality and grinding surface quality in the inlay material are improved, and the accuracy of metallographic detection is improved.
Patent Information
- Application Number
- CN202420890088.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The existing metallographic sample fixtures are unreasonable in the inlay process, resulting in the sample being skewed in the inlay material, uneven in the grinding surface, and the fixtures are prone to wear during the grinding and polishing process, affecting the sample preparation quality and metallographic detection accuracy.
A metallographic sample fixture including a mold, a fixture and a limiting mechanism is designed. The mold has an open cavity, and the clamp is detachably installed in the cavity. The machining side of the clamp makes the sample protrude. The limiting mechanism ensures that the clamp is limited in the horizontal direction and prevents the sample from being offset by the coupling of the limiting column and the groove.
Through the cooperation of the clamp and the limiting mechanism, ensure that the sample remains perpendicular in the inlay, avoid wear of the clamp, improve the quality of the wear surface, improve the sample preparation quality and metallographic detection accuracy.
Smart Images
Figure CN222579758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallographic detection, in particular to a metallographic sample preparation jig. Background Art
[0002] Metallographic testing is one of the main methods for studying the internal structure and defects of metals and their alloys. It can be used to observe the microstructure of various alloy materials after different processing or heat treatment. The microstructure determines the performance of the material, thus establishing a connection between different processing methods and the performance of the alloy material. Metallographic testing can be used as a basis for enterprises to guide production on material processing and treatment, reasonably arrange processing plans, and reduce trial and error costs.
[0003] In the process of metallographic sample preparation, it is difficult to directly grind and polish samples of smaller sizes, and they need to be mounted first. However, in the prior art, the fixture structure design for fixing the sample in the mounting process is unreasonable. On the one hand, the fixture is prone to shaking in the grinder, causing the sample to be skewed in the mounting material, and finally the sample is unevenly ground during the grinding and polishing process. On the other hand, the fixture is flush with or higher than the grinding surface. During the grinding and polishing of the sample, the fixture is also worn to produce abrasive particles, which are easy to cause scratches on the grinding surface. Some abrasive particles may even be embedded in the grinding surface, resulting in poor sample preparation quality, adversely affecting subsequent microstructure observation, and reducing the accuracy of metallographic detection. Utility Model Content
[0004] The utility model aims to provide a metallographic sample preparation fixture which can improve the sample preparation quality in the inlay process of sample preparation, thereby improving the accuracy of metallographic detection.
[0005] In order to solve the above technical problems, the utility model provides a metallographic sample preparation jig, comprising:
[0006] The mold is formed with a cavity, wherein the upper side of the cavity is open;
[0007] A fixture is detachably mounted in the cavity, the upper side or the lower side of the fixture constitutes a processing side, the fixture is used to clamp the sample, and the fixture is configured so that the clamped sample protrudes from the processing side of the fixture; and,
[0008] A limiting mechanism is arranged in the cavity, and the limiting mechanism includes a plurality of limiting columns extending upward from the bottom wall of the cavity, and the plurality of limiting columns are distributed at intervals along the circumference of the clamp. When the clamp is installed in the cavity, each limiting column abuts against the circumferential side of the clamp so that the clamp is limited in the horizontal direction.
[0009] Optionally, a plurality of limiting grooves extending in the up-down direction are formed on the outer circumference of the clamp, and the plurality of limiting grooves are spaced apart in the circumference of the clamp. When the clamp is installed in the cavity, a plurality of limiting columns correspond to each other one by one and are at least partially embedded in the plurality of limiting grooves.
[0010] Optionally, the cavity has an inner circumferential wall arranged around the outer circumference of the clamp, and each of the limiting columns is adjacent to the inner circumferential wall on one side in the up and down direction, and protrudes from the inner circumferential wall into the cavity on the other side.
[0011] Optionally, the lower side of the clamp constitutes the processing side, and when the clamp is installed in the cavity, a gap is defined between the processing side and the bottom wall of the cavity, and the gap is used to accommodate the sample protruding from the processing side.
[0012] Optionally, a step surface is formed between the upper end and the lower end of each of the limiting columns, and the step surface of each of the limiting columns is used to abut the processing side, so that the clamp is supported on a plurality of the step surfaces when installed in the cavity.
[0013] Optionally, the cross-sectional outer contour of the clamp in the up-down direction is square and has four corners distributed on the periphery of the clamp, and four limiting grooves are provided, and the four limiting grooves are formed at the four corners in a one-to-one correspondence.
[0014] Optionally, the clamp has a channel passing through its upper and lower sides, and the clamp includes a side wall located on the circumferential side of the channel, the side wall is arranged between two of the circumferentially adjacent corners, the side wall has a slit passing through the upper and lower sides of the clamp in the up and down directions, the slit connects the channel and the outer circumference of the side wall, the side wall includes a first bending portion and a second bending portion respectively arranged on both sides of the slit in the circumferential direction, the first bending portion and the second bending portion are respectively bent toward the inside of the channel, and the first bending portion and the second bending portion are respectively bent toward the end surface of the slit in a direction away from the slit.
[0015] Optionally, the cavity is cylindrical in shape.
[0016] Optionally, the material of the clamp is plastic, and the material of the mold is silicone.
[0017] Optionally, the limiting mechanism is made of silicone and is integrally formed with the mold.
[0018] The technical solution provided by the utility model has the following advantages:
[0019] The metallographic sample preparation fixture provided by the utility model comprises a mold, a clamp and a limiting mechanism, wherein the mold has a cavity with an open upper side, the clamp is detachably installed in the cavity, and the upper side or the lower side thereof constitutes a processing side, the sample clamped by the clamp protrudes from the processing side of the clamp, and the limiting mechanism is arranged in the cavity, comprising a plurality of limiting columns, and the plurality of limiting columns are spaced and distributed along the circumference of the clamp, and when the clamp is installed in the cavity, each limiting column abuts against the circumference of the clamp, so that the clamp is limited in the horizontal direction. In the utility model, the clamp is stably fixed in the mold cavity through the cooperation of the clamp and the limiting mechanism, so that after the inlay material is poured into the mold cavity, the sample can be kept vertical in the inlay material, and in addition, the sample can protrude from the processing side of the clamp, so as to avoid the clamp being worn and producing abrasive particles during the grinding and polishing process, which affects the grinding surface quality, thereby achieving the purpose of improving the sample preparation quality and improving the accuracy of metallographic detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a metallographic sample preparation fixture provided by the utility model;
[0022] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the metallographic sample preparation fixture from another perspective, in which the fixture holds the sample;
[0023] Figure 3 for Figure 1 Top view of the metallographic sample preparation fixture;
[0024] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the middle fixture;
[0025] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the middle fixture from another perspective, wherein the fixture holds the specimen;
[0026] Figure 6 for Figure 4 Top view of the middle fixture;
[0027] Figure 7 for Figure 1 Schematic diagram of the three-dimensional structure of the middle mold and the limiting mechanism;
[0028] Figure 8 for Figure 7 Top view of the middle mold and limit mechanism.
[0029] Description of reference numerals:
[0030] 100-metallographic sample preparation fixture; 10-mold; 11-cavity; 12-inner wall; 13-bottom wall; 20-clamp; 21-processing side; 22-limiting groove; 23-corner; 24-channel; 25-side wall; 251-first bending part; 252-second bending part; 26-slit; 30-limiting mechanism; 31-limiting column; 40-gap; 200-sample. DETAILED DESCRIPTION
[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0033] The utility model provides a metallographic sample preparation fixture 100 for metallographic detection. It can be understood that, generally speaking, metallographic detection includes multiple steps such as sampling, embedding, grinding and polishing, tissue corrosion and tissue observation.
[0034] The inlay process is suitable for the case where the sample 200 is too small or irregular in shape, and it is difficult to directly hold the sample 200 for grinding and polishing. In this process, the metallographic sample preparation fixture 100 is needed to fix the sample 200, and then the inlay material is poured. After the inlay material is solidified, a sample inlaid with the sample 200 can be obtained. The operator can hold or use mechanical clamping to perform the next step of grinding and polishing on the sample.
[0035] See also Figures 1 to 8The metallographic sample preparation fixture 100 provided by the utility model includes a mold 10, a clamp 20 and a limiting mechanism 30, wherein the mold 10 is formed with a cavity 11, and the upper side of the cavity 11 is open. The clamp 20 is detachably installed in the cavity 11, and the upper side or the lower side of the clamp 20 constitutes a processing side 21, and the processing side 21 refers to the plane of the clamp 20 facing the grinding and polishing tool during the grinding process. The clamp 20 is used to clamp the sample 200, and the clamp 20 is configured so that the clamped sample 200 protrudes from the clamp 20 from the processing side 21, that is, the grinding surface of the sample to be processed is higher than the plane where the processing side 21 is located. In this way, during the grinding and polishing process, the clamp 20 will not be ground and generate particles, thereby avoiding scratches on the grinding surface of the sample 200 or embedded particles that affect its quality.
[0036] The limiting mechanism 30 is arranged in the cavity 11, and the limiting mechanism 30 includes a plurality of limiting posts 31 extending upward from the bottom wall 13 of the cavity 11, and the plurality of limiting posts 31 are spaced apart along the circumference of the clamp 20. When the clamp 20 is installed in the cavity 11, each of the limiting posts 31 abuts against the circumference of the clamp 20, so that the clamp 20 is limited in the horizontal direction. In this embodiment, the limiting mechanism 30 realizes the circumferential limitation of the sample through the cooperation of the plurality of limiting posts 31, so that the sample is not easily deviated and tilted during the process of pouring the inlay material, thereby ensuring the verticality of the inlay material and facilitating the surface grinding.
[0037] In this embodiment, the fixture 20 can be taken out separately first, the sample 200 can be clamped in the fixture 20, and then the fixture 20 is placed in the cavity 11 of the mold 10. After the fixture 20 is positioned by the limiting mechanism 30, the embedding material is poured, preferably using a cold embedding process, and the material of the embedding material can include epoxy resin plus a curing agent, etc. After the embedding material is cured, the sample embedded with the sample 200 is taken out, and then the subsequent grinding and polishing process can be performed.
[0038] In this embodiment, the specific materials of the mold 10 and the furniture can be selected as needed. Optionally, the material of the clamp 20 is plastic so that it has good elastic deformation ability, so as to facilitate the clamping of the sample. The material of the mold 10 is silicone, which is conducive to demoulding. The cost of plastic is relatively low, and the clamp 20 is disposable. The angle of the plastic material is conducive to the control of production costs. Silicone has good demoulding performance and can be reused repeatedly. Preferably, the cavity 11 is formed in a cylindrical shape, so that the solidified inlay material is in smooth contact with the inner wall of the wall, the friction is small, and it is easy to demould.
[0039] Preferably, the limiting mechanism 30 is integrally formed with the mold 10 and is also made of silicone. In this way, sufficient elastic support force is provided to limit the clamp 20. Preferably, the cavity 11 has an inner peripheral wall 12 arranged around the outer periphery of the clamp 20, and each of the limiting columns 31 is adjacent to the inner peripheral wall 12 on one side in the up and down direction, and protrudes from the inner peripheral wall 12 into the cavity 11 on the other side (not shown in the figure). In this way, while maintaining the good limiting performance of the limiting mechanism 30, it is conducive to the demoulding of each limiting column 31.
[0040] Please continue reading Figures 4 to 6 The outer circumference of the clamp 20 is formed with a plurality of limiting grooves 22 extending in the up-down direction, and the plurality of limiting grooves 22 are spaced apart in the circumferential direction of the clamp 20. When the clamp 20 is installed in the cavity 11, the plurality of limiting posts 31 correspond to each other and are at least partially embedded in the plurality of limiting grooves 22. In this way, the accurate positioning of the embedding position of the clamp 20 is achieved by using the concave-convex cooperation between the limiting posts 31 and the limiting grooves 22.
[0041] Based on the above embodiment, the processing side 21 of the clamp 20 can be the upper side or the lower side. Figure 2 and Figure 5 The lower side of the fixture 20 constitutes the processing side 21. When the fixture 20 is installed in the cavity 11, a gap 40 is defined between the processing side 21 and the bottom wall 13 of the cavity 11. The gap 40 is used to accommodate the sample 200 protruding from the processing side 21. In this way, the sample 200 protrudes from the lower plane of the angle, and the distance between it and the bottom surface of the solidified inlay is fixed, so as to avoid the sample being covered too deeply by the inlay, which makes the grinding and polishing difficult.
[0042] Preferably, a step surface (not shown in the figure) is formed between the upper end and the lower end of each of the limiting pillars 31, and the step surface of each of the limiting pillars 31 is used to abut the processing side 21, so that the clamp 20 is supported on a plurality of the step surfaces when installed in the cavity 11. In this way, the clamp 20 is supported by the step surface, ensuring that the distance between the processing side 21 and the outer side of the inlay material is constant, which is easy to process.
[0043] Please continue reading Figure 4 The cross-sectional outer contour of the clamp 20 in the vertical direction is square, and has four corners 23 distributed on the outer periphery of the clamp 20, and four limiting grooves 22 are provided, and the four limiting grooves 22 are formed at the four corners 23 in a one-to-one correspondence, so that the clamp 20 can be embedded between the plurality of limiting columns 31.
[0044] Furthermore, the clamp 20 has a channel 24 passing through its upper and lower sides, and the clamp 20 includes a side wall 25 located on the peripheral side of the channel 24, and the side wall 25 is arranged between two of the circumferentially adjacent corners 23, and the side wall 25 has a slit 26 passing through the upper and lower sides of the clamp 20 in the up and down directions, and the slit 26 connects the channel 24 and the outer peripheral side of the side wall 25, and the side wall 25 includes a first bending portion 251 and a second bending portion 252 respectively arranged on both sides of the slit 26 in the circumferential direction, the first bending portion 251 and the second bending portion 252 are respectively bent toward the inside of the channel 24, and the first bending portion 251 and the second bending portion 252 are respectively bent toward the end faces of the slit 26 in the direction away from the slit 26. In this embodiment, the one-piece structure of the clamp 20 is used to form a slit 26 for clamping the sample 200, and the sample 200 can be inserted into the slit 26 from the outside, which is convenient and reliable to install. The first bending portion and the second bending portion of the arc surface make it easier to insert the sample 200, and the friction is small, so it is not easy to damage the sample 200.
[0045] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.
Claims
1. A metallographic sample preparation jig, characterized in that: include: The mold is formed with a cavity, wherein the upper side of the cavity is open; A fixture is detachably mounted in the cavity, the upper side or the lower side of the fixture constituting a processing side, the fixture is used to clamp the sample, and the fixture is arranged so that the clamped sample protrudes from the processing side of the fixture; as well as, A limiting mechanism is arranged in the cavity, and the limiting mechanism includes a plurality of limiting columns extending upward from the bottom wall of the cavity, and the plurality of limiting columns are distributed at intervals along the circumference of the clamp. When the clamp is installed in the cavity, each limiting column abuts against the circumferential side of the clamp so that the clamp is limited in the horizontal direction.
2. The metallographic sample preparation jig according to claim 1, characterized in that: The outer circumference of the clamp is formed with a plurality of limiting grooves extending in the up-down direction, and the plurality of limiting grooves are distributed at intervals in the circumferential direction of the clamp. When the clamp is installed in the cavity, the plurality of limiting columns correspond to each other one by one and are at least partially embedded in the plurality of limiting grooves.
3. The metallographic sample preparation jig according to claim 2, characterized in that: The cavity has an inner circumferential wall arranged around the outer circumference of the clamp, and each of the limiting columns is closely adjacent to the inner circumferential wall on one side in the up-down direction and protrudes from the inner circumferential wall into the cavity on the other side.
4. The metallographic sample preparation jig according to claim 2, characterized in that: The lower side of the fixture constitutes the processing side. When the fixture is installed in the cavity, a gap is defined between the processing side and the bottom wall of the cavity, and the gap is used to accommodate the sample protruding from the processing side.
5. The metallographic sample preparation jig according to claim 3, characterized in that: A step surface is formed between the upper end and the lower end of each of the limiting columns, and the step surface of each of the limiting columns is used to abut the processing side, so that the clamp is supported on a plurality of the step surfaces when installed in the cavity.
6. The metallographic sample preparation jig according to claim 2, characterized in that: The outer contour of the cross section of the clamp in the up-down direction is square and has four corners distributed on the outer periphery of the clamp. Four limiting grooves are provided, and the four limiting grooves are formed at the four corners in a one-to-one correspondence.
7. The metallographic sample preparation jig according to claim 6, characterized in that: The clamp has a channel passing through its upper and lower sides, and the clamp includes a side wall located on the circumferential side of the channel, and the side wall is arranged between two of the circumferentially adjacent corners. The side wall has a slit passing through the upper and lower sides of the clamp in the up-down direction, and the slit connects the channel and the outer circumference of the side wall. The side wall includes a first bending portion and a second bending portion respectively arranged on both sides of the slit in the circumferential direction, the first bending portion and the second bending portion are respectively bent toward the inside of the channel, and the first bending portion and the second bending portion are respectively bent toward the end surface of the slit in a direction away from the slit.
8. The metallographic sample preparation jig according to any one of claims 1 to 7, characterized in that: The cavity is cylindrical in shape.
9. The metallographic sample preparation jig according to any one of claims 1 to 7, characterized in that: The material of the clamp is plastic, and the material of the mold is silicone.
10. The metallographic sample preparation jig according to claim 9, characterized in that: The material of the limiting mechanism is silicone and is integrally formed with the mold.