Handheld clamp for blocky metallographic specimen

Abstract

The utility model provides a handheld clamp for a blocky metallographic specimen, which relates to the technical field of metallographic specimen clamps, and comprises a cylinder body, the cylinder body comprises an inner layer and an outer layer, the hardness of the inner layer is greater than that of the outer layer, the outer wall of the cylinder body is provided with a first fastener, and the first fastener can extend into the cylinder body and clamp the metallographic specimen in the cylinder body; the outer periphery of the cover plate is connected with the inner periphery of the cylinder body, the cover plate is provided with a second fastener, and the second fastener can extend into the cylinder body and is in contact with a metallographic specimen in the cylinder body; the problems that in the prior art, when a block-shaped metallographic sample is ground and polished, the edge of the metallographic sample is prone to being rounded, and the morphology characteristics of defects of the original edge position are damaged are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallographic specimen fixtures, and more specifically, relates to a hand-held fixture for block-shaped metallographic specimens. Background Art

[0002] In the iron and steel industry, the metallographic inspection of metals occupies a quite important position. Metallographic specimens need to be ground and polished into a mirror surface. At present, there is a lack of fixtures for hand-held grinding and polishing of block-shaped metallographic specimens. When directly holding the metallographic specimen for grinding and polishing, when there are defects at the edge of the metallographic specimen, the edge of the metallographic specimen is easily ground round during the hand-held grinding and polishing process, resulting in the problem that the defect morphology at the edge position cannot be accurately observed. The existing metallographic embedding method brings certain difficulties to subsequent analysis, has certain drawbacks, causes waste of materials, has high temperature during operation, and is inefficient. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a hand-held fixture for block-shaped metallographic specimens to solve the problem in the prior art that when grinding and polishing block-shaped metallographic specimens, the edge of the metallographic specimen is easily ground round, destroying the morphological characteristics of the defects at the original edge position.

[0004] To achieve the above purpose, the utility model provides a hand-held fixture for block-shaped metallographic specimens, including:

[0005] A cylinder body, the cylinder body includes an inner layer and an outer layer, the hardness of the inner layer is greater than that of the outer layer, a first fastener is arranged on the outer wall of the cylinder body, and the first fastener can extend into the interior of the cylinder body and clamp the metallographic specimen located inside the cylinder body;

[0006] A cover plate, the outer periphery of the cover plate is connected to the inner periphery of the cylinder body, the cover plate is provided with a second fastener, and the second fastener can extend into the interior of the cylinder body and contact the metallographic specimen located inside the cylinder body.

[0007] Optionally, the cylinder body is cylindrical.

[0008] Optionally, the material of the inner layer is high-carbon steel, and the material of the outer layer is low-carbon steel.

[0009] Optionally, at least two layers of first threaded holes are formed on the outer wall of the cylinder body, and each layer of the first threaded holes is evenly distributed in the circumferential direction of the cylinder body.

[0010] Optionally, the first fastener is a first bolt that is threadedly engaged with the first threaded hole.

[0011] Optionally, the cover plate is welded to the inner layer.

[0012] Optionally, the cover plate is provided with a plurality of second threaded holes, and the plurality of second threaded holes are radially arranged on the cover plate.

[0013] Optionally, the second fastener is a second bolt threadably matched with the second threaded hole.

[0014] Optionally, a receiving cavity is formed between a side surface of the cover plate close to the operating end of the second bolt and an end surface of the cylinder, and the receiving cavity is used to receive the operating end of the second bolt.

[0015] Optionally, a butterfly nut is provided at the outer end of the first bolt, and the butterfly nut is fixedly connected to the first bolt.

[0016] The utility model provides a hand-held clamp for block metallographic samples, which has the beneficial effects that: the hand-held clamp for block metallographic samples can accommodate the block metallographic samples inside a cylinder body, after the metallographic samples are placed inside the cylinder body, a first fastener can be inserted into the cylinder body to clamp and fix the metallographic samples along the radial direction of the cylinder body, and then a second fastener on a cover plate can be inserted into the cylinder body to clamp the metallographic samples along the axial direction of the cylinder body, thereby ensuring a stable and firm clamping effect and improving the stability and grinding quality of the metallographic samples during grinding and polishing; during the grinding and polishing process, the metallographic samples are grinded and polished in sequence through metallographic grinding and polishing, and during the grinding process, the cylinder body and the metallographic samples are grinded together, the hardness of the inner layer of the cylinder body is greater than that of the outer layer, the hardness of the outer layer is relatively small, and it is easy to grind, which can improve the grinding efficiency, and the hardness of the inner layer is relatively hard, and for the metallographic samples with defects on the edge, when clamping, the defective side of the metallographic sample is in contact with the inner wall of the inner layer, and the defects at the edge are protected by the inner layer with relatively high hardness, thereby avoiding the situation that the position with defects at the edge is rounded.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a handheld fixture for a block metallographic sample according to an embodiment of the utility model is shown.

[0020] Figure 2 The present invention shows a schematic diagram of a bottom-up structure of a hand-held fixture for a block metallographic sample according to an embodiment of the present invention.

[0021] Figure 3 The three-dimensional sectional structural schematic diagram of a hand-held fixture for a block-shaped metallographic specimen according to an embodiment of the present invention is shown.

[0022] Figure 4 The top-view structural schematic diagram of a hand-held fixture for a block-shaped metallographic specimen according to an embodiment of the present invention is shown.

[0023] Explanation of reference numerals:

[0024] 1, cylinder body; 2, first fastener; 3, metallographic specimen; 4, cover plate; 5, second fastener; 6, butterfly nut. Specific embodiments

[0025] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0026] As Figures 1 to 4 shown, the present invention provides a hand-held fixture for a block-shaped metallographic specimen, comprising:

[0027] A cylinder body 1, the cylinder body 1 includes an inner layer and an outer layer, the hardness of the inner layer is greater than that of the outer layer, and a first fastener 2 is arranged on the outer wall of the cylinder body 1, and the first fastener 2 can extend into the inside of the cylinder body 1 and clamp the metallographic specimen 3 located inside the cylinder body 1;

[0028] A cover plate 4, the outer periphery of the cover plate 4 is connected to the inner periphery of the cylinder body 1, and a second fastener 5 is arranged on the cover plate 4, and the second fastener 5 can extend into the inside of the cylinder body 1 and contact the metallographic specimen 3 located inside the cylinder body 1.

[0029] Specifically, to solve the problem that in the prior art, when the block-shaped metallographic specimen 3 is polished, the edge of the metallographic specimen 3 is easily rounded, destroying the morphological characteristics of the defect at the original edge position; the handheld fixture for the block-shaped metallographic specimen provided by the present utility model can accommodate the block-shaped metallographic specimen 3 inside the cylinder body 1. After the metallographic specimen 3 is placed inside the cylinder body 1, the first fastener 2 can extend into the inside of the cylinder body 1 to clamp and fix the metallographic test along the radial direction of the cylinder body 1. Then, the second fastener 5 on the cover plate 4 extends into the inside of the cylinder body 1 to also clamp the metallographic specimen 3 along the axial direction of the cylinder body 1, ensuring a stable and firm clamping effect, and improving the stability and polishing quality of the metallographic specimen 3 during the polishing process; during the polishing process, the metallographic specimen 3 is polished and polished in sequence through metallographic polishing. During the polishing process, the cylinder body 1 and the metallographic specimen 3 are polished together. The hardness of the inner layer of the cylinder body 1 is greater than that of the outer layer, and the hardness of the outer layer is relatively small and easy to polish, which can improve the polishing efficiency. The hardness of the inner layer is relatively hard. For the metallographic specimen 3 with defects at the edge, when clamping, the defective side of the metallographic specimen 3 is in contact with the inner wall of the inner layer, and the relatively hard inner layer is used to protect the defects at the edge, avoiding the situation that the positions with defects at the edge are rounded.

[0030] Optionally, the cylinder body 1 is cylindrical.

[0031] Specifically, when the axis of the cylinder body 1 is vertical, the two end faces of the cylindrical cylinder body 1 are respectively arranged along two horizontal planes.

[0032] Optionally, the material of the inner layer is high-carbon steel, and the material of the outer layer is low-carbon steel.

[0033] Specifically, the inner layer is made of relatively hard high-carbon steel material to ensure its protection effect on the metallographic specimen 3, and the outer layer is made of relatively soft low-carbon steel material to ensure better polishing efficiency.

[0034] Furthermore, the inner layer and the outer layer can be integrally connected or connected by welding.

[0035] In this embodiment, the outer diameter of the cylinder body 1 is less than 40 mm, the wall thickness is greater than 5 mm, and the height is less than 40 mm. The overall volume of this fixture is small, easy to hold and move, and convenient to operate.

[0036] Optionally, at least two layers of first threaded holes are provided on the outer wall of the cylinder body 1, and each layer of first threaded holes is evenly distributed in the circumferential direction of the cylinder body 1.

[0037] Specifically, the first threaded holes are arranged in layers, and the adjacent two layers of first threaded holes are spaced apart. Each layer of first threaded holes has at least three, and they are evenly distributed in the circumferential direction of the cylinder body 1. The axis of each first threaded hole is along the radial direction of the cylinder body 1.

[0038] In this embodiment, four first threaded holes are provided in each layer, and the axes of the four first threaded holes are arranged in a cross shape.

[0039] Optionally, the first fastener 2 is a first bolt threadably matched with the first threaded hole.

[0040] Specifically, the first thread is used as the first fastener 2, and the first bolt is screwed to extend into the interior of the cylinder 1, so that the irregularly shaped block metallographic sample 3 can be clamped and can be clamped at any desired fixed position.

[0041] Optionally, the cover plate 4 is welded to the inner layer.

[0042] Specifically, the cover plate 4 is fixedly connected to the inside of the cylinder 1 , and the cover plate 4 supports the second fastener 5 , and the metallographic sample 3 is further tightened and positioned through the second fastener 5 .

[0043] Optionally, the cover plate 4 is provided with a plurality of second threaded holes, and the plurality of second threaded holes are radially arranged on the cover plate 4 .

[0044] In this embodiment, the plurality of second threaded holes are arranged in a cross shape, and correspond in orientation to the first threaded holes arranged in the cross shape.

[0045] Optionally, the second fastener 5 is a second bolt threadably matched with the second threaded hole.

[0046] Specifically, the second thread is used as the second fastener 5, and the second bolt is screwed to extend toward the inside of the cylinder 1, so as to support the metallographic sample 3 and improve the stability during grinding.

[0047] In this embodiment, the second bolt is a hexagonal head bolt.

[0048] Optionally, a receiving cavity is formed between a side surface of the cover plate 4 close to the operating end of the second bolt and an end surface of the cylinder 1 , and the receiving cavity is used to receive the operating end of the second bolt.

[0049] Specifically, the arrangement of the accommodating cavity can accommodate the operating end of the second bolt, so that the operating end of the second bolt is not exposed and does not protrude from the end surface of the cylinder 1. In this way, when the handheld clamp holding the block metallographic sample 3 is placed on a metallographic microscope for observation, it is convenient for overall positioning.

[0050] In this embodiment, the distance between the cover plate 4 and the end surface of the cylinder body 1 is at least 5 mm.

[0051] Optionally, a butterfly nut 6 is provided at the outer end of the first bolt, and the butterfly nut 6 is fixedly connected to the first bolt.

[0052] Specifically, a butterfly nut 6 is provided at the outer end of the first bolt to facilitate manual tightening to clamp the metallographic sample 3 .

[0053] In summary, when the handheld clamp of the block metallographic sample provided by the utility model is used, take a metallographic inspection of a block metallographic sample 3 with defects at the edge as an example: first, the metallographic sample 3 is placed in the cylinder 1, so that the defective side of the metallographic sample 3 is close to the inner wall of the inner layer of the cylinder 1, so as to protect the edge of the metallographic sample 3; then adjust the first bolt to clamp the metallographic sample 3 along the radial direction of the cylinder 1; then adjust the second bolt to further tighten and position the metallographic sample 3 along the axial direction of the cylinder 1; then hold the handheld clamp of the block metallographic sample that clamps the metallographic sample 3 as a whole and grind and polish it in sequence on the metallographic grinder and polisher, during which the cylinder 1 and the metallographic sample 3 are polished together; finally, place the handheld clamp of the block metallographic sample that clamps the metallographic sample 3 as a whole on a metallographic microscope for observation and analysis; there is no need to disassemble the metallographic sample 3 during analysis, so as to avoid wasting time on grinding and polishing again.

[0054] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hand-held fixture for block metallographic specimens, characterized in that: include: A cylinder, the cylinder comprising an inner layer and an outer layer, the inner layer has a harder surface than the outer layer, and the outer wall of the cylinder is provided with a first fastener, the first fastener can extend into the interior of the cylinder and clamp the metallographic sample inside the cylinder; A cover plate, the outer periphery of which is connected to the inner periphery of the cylinder, and the cover plate is provided with a second fastener, which can extend into the interior of the cylinder and contact the metallographic sample inside the cylinder.

2. The hand-held fixture for block metallographic specimens according to claim 1, characterized in that: The cylinder is cylindrical.

3. The hand-held fixture for block metallographic specimens according to claim 1, characterized in that: The material of the inner layer is high carbon steel, and the material of the outer layer is low carbon steel.

4. The hand-held fixture for block metallographic specimens according to claim 1, characterized in that: At least two layers of first threaded holes are formed on the outer wall of the cylinder, and the first threaded holes in each layer are evenly distributed in the circumferential direction of the cylinder.

5. The hand-held fixture for block metallographic specimens according to claim 4, characterized in that: The first fastener is a first bolt threadably matched with the first threaded hole.

6. The hand-held fixture for block metallographic specimens according to claim 1, characterized in that: The cover plate is welded to the inner layer.

7. The hand-held fixture for block metallographic specimens according to claim 1, characterized in that: The cover plate is provided with a plurality of second threaded holes, and the plurality of second threaded holes are radially arranged on the cover plate.

8. The hand-held fixture for block metallographic specimens according to claim 7, characterized in that: The second fastener is a second bolt threadably matched with the second threaded hole.

9. The hand-held fixture for block metallographic specimens according to claim 8, characterized in that: A receiving cavity is formed between a side surface of the cover plate close to the operating end of the second bolt and the end surface of the cylinder, and the receiving cavity is used to receive the operating end of the second bolt.

10. The hand-held fixture for block metallographic specimens according to claim 5, characterized in that: A butterfly nut is provided at the outer end of the first bolt, and the butterfly nut is fixedly connected to the first bolt.

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