Grinding and polishing clamp

Abstract

The embodiment of the invention relates to a workpiece support used for grinding or polishing, in particular to a grinding and polishing clamp. The grinding and polishing clamp comprises a base, a radial movable abutting assembly and two circumferential movable abutting pieces. The base is arranged to form an accommodating space; the radial movable abutting assembly is movably arranged in the containing space in the radial direction of the containing space. The two circumferential movable abutting pieces are movably arranged in the containing space in the circumferential direction of the containing space and used for clamping the sample to be ground and polished together with the radial movable abutting assembly. According to the embodiment of the invention, the radial movable abutting assembly and the two circumferential movable abutting pieces are arranged at the same time, so that the circumferential positions of the two circumferential movable abutting pieces along the accommodating space can be adjusted by adjusting the radial position of the radial movable abutting assembly along the accommodating space; therefore, the clamp is suitable for clamping samples with different sizes and different shapes.

Description

Technical Field

[0001] Embodiments of this application relate to workpiece supports for grinding or polishing, and more particularly to a grinding and polishing fixture. Background Technology

[0002] This section is only intended to provide background information relevant to this application and does not necessarily constitute prior art.

[0003] Metallographic analysis is one of the important methods in the experimental research of metallic materials, and it is a common means of studying the microstructure and microstructure of metals and alloys. Before performing metallographic analysis, the metal sample needs to be polished to obtain a metallographic sample suitable for microstructure analysis.

[0004] Metal samples are typically polished using either conventional or automatic polishing machines, with automatic machines offering higher efficiency. However, there are still limitations to using automatic polishing machines for metal samples. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] An embodiment of this application provides a polishing fixture, comprising: a base, a radially movable abutment assembly, and two circumferentially movable abutment members. The base is configured to form a receiving space; the radially movable abutment assembly is configured to be movably disposed in the receiving space radially along the receiving space; the two circumferentially movable abutment members are configured to be movably disposed in the receiving space circumferentially along the receiving space, for clamping the sample to be polished together with the radially movable abutment assembly.

[0007] The embodiments of this application simultaneously provide a radially movable abutting component that is movably disposed in the receiving space along the radial direction and two circumferentially movable abutting members that are movably disposed in the receiving space along the circumferential direction. By adjusting the radial position of the radially movable abutting component along the receiving space and adjusting the circumferential position of the two circumferentially movable abutting members along the receiving space, it is suitable for clamping samples of different sizes and shapes.

[0008] These and other advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0009] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The drawings, together with the following detailed description, are included in and form a part of this specification. Elements having the same function and structure are indicated by the same reference numerals. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0010] Figure 1 This is a schematic diagram of the structure of a grinding and polishing fixture according to an embodiment of this application; Figure 2 yes Figure 1 A partially exploded view of the grinding and polishing fixture shown. Figure 3 yes Figure 1 A top view of the grinding and polishing fixture shown; Figure 4 yes Figure 1 A cross-sectional schematic diagram of the grinding and polishing fixture shown; Figure 5 It is a different perspective. Figure 1 A schematic diagram of the grinding and polishing fixture shown.

[0011] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding.

[0012] Explanation of reference numerals in the attached figures: 10. Base; 11. Cylindrical component; 111. Through hole; 12. First connector; 121. Positioning part; 122. Stepped surface; 13. Second connector; 131. Threaded hole; 20. Radial movable abutment assembly; 21. Stud; 22. Movable plate; 30. Circumferentially movable contact part; 31. Positioning and mating part; 301. Arc surface; 302. Plane; 303. Flexible layer; 40. Pressure distribution component. Detailed Implementation

[0013] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0014] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0015] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by a person with ordinary skills in the field to which this application pertains.

[0016] In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] Because the grinding heads of automatic polishing machines are of a fixed shape, they only support cylindrical resin-mounted samples, while the metallographic samples to be prepared may have various complex shapes. Furthermore, the surface composition of some metal samples is unsuitable for resin mounting or needs to be removed after polishing, resulting in significant limitations in the resin mounting sample technology process. Therefore, when polishing metal samples, the lack of suitable polishing fixtures often forces manual polishing of metal samples, even on automatic polishing machines.

[0018] To address the aforementioned issues, embodiments of this application provide a grinding and polishing fixture capable of holding metal samples, suitable for use in automatic grinding and polishing machines.

[0019] See Figure 1 , Figure 1 This is a schematic diagram of a polishing fixture according to an embodiment of this application. The polishing fixture of this embodiment includes: a base 10, a radially movable abutment component 20, and two circumferentially movable abutment members 30. The base 10 is configured to form a receiving space; the radially movable abutment component 20 is configured to be movably disposed in the receiving space radially; the two circumferentially movable abutment members 30 are configured to be movably disposed in the receiving space circumferentially, for clamping the sample to be polished together with the radially movable abutment component 20.

[0020] The polishing fixture of this application, by simultaneously providing a radially movable abutting component 20 movably disposed in the receiving space along the radial direction and two circumferentially movable abutting members 30 movably disposed in the receiving space along the circumferential direction, can be adapted to clamp samples of different sizes and shapes by adjusting the radial position of the radially movable abutting component 20 along the receiving space and adjusting the circumferential position of the two circumferentially movable abutting members 30 along the receiving space.

[0021] The polishing fixture of this application can polish samples with complex shapes, special surface compositions, or those that are not suitable for resin mounting for other reasons. Compared with manual hand-held sample polishing using an automatic polishing machine, the embodiments of this application can avoid the phenomena such as grinding deviation, grinding slant, and the appearance of multiple polishing planes that are easy to occur during manual sample preparation, thereby improving the efficiency of polishing sample preparation.

[0022] See Figure 1 In some embodiments, the base 10 may include a cylindrical member 11, a first connector 12, and a second connector 13. The first connector 12 is fixedly connected to one end of the inner wall of the cylindrical member 11, and two circumferentially movable abutting members 30 are movably disposed in the receiving space through the first connector 12. The second connector 13 is fixedly connected to the inner wall of the cylindrical member 11 and is used to assemble the radially movable abutting assembly 20. In such an embodiment, when the polishing fixture is placed in the grinding hole of the automatic polishing machine, the radially outer surface of the cylindrical member 11 faces the inner wall of the grinding hole of the automatic polishing machine. The two circumferentially movable abutting members 30 and the radially movable abutting assembly 20 are movably disposed in the receiving space through the first connector 12 and the second connector 13, respectively, without affecting the placement of the polishing fixture in the grinding hole of the automatic polishing machine.

[0023] The polishing fixture of this application can clamp and fix samples of different shapes from three directions according to the three-point plane principle, with two circumferential movable abutment members 30 and radial movable abutment components 20. Due to the height symmetry of the circle, the position of the circumferential movable abutment members 30 in the base 10 can be adjusted to match the extension distance of the radial movable abutment components 20, so as to achieve the fixed clamping adaptation for samples of different shapes and uneven sizes.

[0024] In some embodiments, the outer diameter of the cylindrical component 11 is clearance-fitted with the inner diameter of the grinding hole of the automatic polishing machine so that it can be inserted into the grinding hole of the automatic polishing machine. In some embodiments, the outer diameter of the cylindrical component 11 is less than or equal to 3 cm.

[0025] In some embodiments, the first connector 12, the second connector 13, and the cylindrical component 11 can be a single piece to improve the overall strength of the grinding and polishing fixture when the outer diameter of the cylindrical component 11 is less than or equal to 3 cm, and to facilitate manufacturing.

[0026] In some embodiments, the two ends of the first connector 12 and the two ends of the second connector 13 are connected along the circumferential direction of the cylindrical member 11, which helps to improve the overall strength of the grinding and polishing fixture.

[0027] In some embodiments, the first connecting member 12 is an arc-shaped member with both ends connected to the second connecting member 13, and the arc-shaped member forms a plurality of positioning portions 121 along the circumferential direction; each circumferentially movable abutment member 30 is provided with a positioning mating portion 31, and the circumferentially movable abutment member 30 is movably disposed on the arc-shaped member through the cooperation of the positioning mating portion 31 and the positioning portion 121. In such an embodiment, the circumferentially movable abutment member 30 can change the position of the positioning portion 121 that cooperates with its positioning mating portion 31, thereby changing the position of the circumferentially movable abutment member 30 along the circumferential direction of the cylindrical member 11, so as to clamp samples of different sizes and shapes.

[0028] In some embodiments, the positioning part 121 can be a blind hole; the positioning mating part 31 can be a protrusion that engages with the blind hole. By inserting the protrusion into blind holes at different positions, the position of the circumferentially movable abutment 30 can be adjusted.

[0029] In some embodiments, the number of positioning portions 121 is greater than the number of positioning mating portions 31, thereby facilitating the adjustment of the position of the circumferentially movable abutment 30.

[0030] See Figure 2 and Figure 3 In some embodiments, the surface of the circumferential movable abutment 30 facing the cylindrical member 11 is an arc surface 301 that conforms to the shape of the surface of the cylindrical member 11, and the surface of the circumferential movable abutment 30 facing away from the cylindrical member 11 is a plane 302. In such embodiments, when the circumferential movable abutment 30 moves to any position along the circumferential direction of the cylindrical member 11, the design of the arc surface 301 and the plane 302 can both ensure that the circumferential movable abutment 30 fits against the inner wall of the cylindrical member 11 and facilitate the abutment action of the circumferential movable abutment 30 on the sample.

[0031] In some embodiments, the circumferential movable abutment 30 is a column, the side of which is composed of an arc surface 301 and a plane 302. That is, the cross-section of the column is D-shaped, which occupies less space and helps to ensure the abutment effect of the circumferential movable abutment 30 on the sample.

[0032] In some embodiments, the central angle corresponding to the arc surface 301 of the circumferential movable abutment 30 is greater than or equal to 75 degrees and less than or equal to 90 degrees, so that it can both adjust its circumferential position along the cylindrical part 11 and clamp the sample.

[0033] In some embodiments, the second connector 13 forms a plurality of threaded holes 131, and the cylindrical member 11 forms a plurality of through holes 111 aligned with the threaded holes 131; the radially movable abutment assembly 20 includes: studs 21 of different lengths and movable plates 22 of different widths. The studs 21 are configured to be threaded into the threaded holes 131 through the through holes 111 and to pass through the threaded holes 131 into the receiving space; the width direction of the movable plate 22 is perpendicular to the axial direction of the cylindrical member 11; wherein, one side surface of one movable plate 22 abuts against a plurality of studs 21 of the same length, and the other side surface abuts against the sample to be ground and polished, thereby clamping the sample to be ground and polished between the two circumferentially movable abutment members 30 and the movable plate 22 through cooperation with the two circumferentially movable abutment members 30. In the embodiments of this application, due to the small size of the polishing fixture, the movable plate 22 needs to be made relatively thin to accommodate larger samples. To ensure the structural strength of the movable plate 22, there is no physical connection between the movable plate 22 and the stud 21; the movable plate 22 is clamped between the end of the stud 21 and the sample to be polished. By selecting a stud 21 of appropriate length, the radial position of the movable plate 22 along the accommodating space can be adjusted within a wide range.

[0034] In some embodiments, the longer stud 21 mates with the narrower movable plate 22; the shorter stud 21 mates with the wider movable plate 22; the stud 21 is located at both ends of the movable plate 22 and abuts against it. In such embodiments, the longer stud 21 mates with the narrower movable plate 22, enabling it to clamp smaller samples together with the two circumferential movable abutments 30; the shorter stud 21 mates with the wider movable plate 22, enabling it to clamp larger samples together with the two circumferential movable abutments 30. Furthermore, when clamping samples, this arrangement helps to position the abutment between the movable plate and the sample between the two studs 21, thus allowing the movable plate 22 to better bear force and preventing rotation of the movable plate, which would result in unstable sample clamping. Additionally, by providing studs 21 of different lengths, the studs 21 can fully enter the inner side of the cylindrical part 11, preventing the studs 21 from protruding from the cylindrical part 11 and adversely affecting the grinding holes of the automatic polishing machine.

[0035] exist Figure 1 In the illustrated embodiment, the radial movable abutment assembly 20 consists of a longer stud 21 and a narrower movable plate 22, which, together with two circumferential movable abutment members 30, clamp a small sample. Specifically, after the sample is placed into the receiving space within the cylindrical member 11, a stud 21 of appropriate length is selected and screwed into the threaded hole 131 to precisely adjust and position the movable plate to clamp the sample.

[0036] In some embodiments, the stud 21 may be an internal cross-shaped flat-end stud 21.

[0037] In some embodiments, a plurality of threaded holes 131 are arranged at intervals along the length of the second connector 13. It is readily understood that when selecting mating threaded holes 131, two longer studs 21 select two threaded holes 131 that are close in distance and located in the middle, and two shorter studs 21 select two threaded holes 131 that are far apart and located at the edge.

[0038] In some embodiments, the second connector 13 may have the same shape as the circumferential movable abutment 30, which occupies less space and helps to ensure the strength of the second connector 13.

[0039] In some embodiments, a flexible layer 303 is formed on the side surface (i.e., plane 302) of the circumferential movable abutment 30 opposite to the cylindrical member 11, and a flexible layer is formed on the surface of the movable plate 22 facing the sample to be polished, to provide a buffering effect on the sample. The material damping effect of the flexible layer effectively suppresses processing vibrations during polishing, thereby ensuring the flatness of the sample surface; in addition, when the fixture clamps the sample, optimized control of contact stress is achieved, avoiding the stress concentration phenomenon caused by traditional rigid fixtures, and ensuring that the sample surface is not subjected to large compressive stress that could damage the sample. In some embodiments, the flexible layer may be made of flexible frosted rubber.

[0040] In some embodiments, see Figure 4 and Figure 5 The polishing fixture may further include a pressure distribution member 40, disposed at one end of the base 10, for contacting one side end face of the sample to be polished. This side end face is the end face facing the pressure head of the automatic polishing machine, i.e., the end face opposite to the end face to be polished. In this way, even if the end face of the sample is uneven, the pressure distribution member 40 can fit tightly against the end face, so that the pressure supplied to the sample by the pressure head in the vertical direction is constant during the polishing process.

[0041] In some embodiments, the pressure distribution element 40 is made of polyurethane.

[0042] In some embodiments, the corresponding radial inner wall of the base 10 forms a stepped surface 122; the pressure distribution member 40 is disposed at the stepped surface 122 to facilitate assembly and positioning.

[0043] The radial inner surface of the first connector 12 forms a stepped surface 122.

[0044] The polishing fixture provided in this application enables fine polishing of different end faces of different samples during metallographic sample preparation. This fixture eliminates the need for resin inlay, offering wide applicability, convenience, and simplicity, thus avoiding the tedious resin inlay process. It boasts high clamping precision, requiring only the inner cross-shaped flat-end set screw 21 to accurately fix the sample to the movable plate 22 and the two circumferential movable abutment parts 30. Simultaneously, the threaded hole 131 can also be used for auxiliary drainage. The flexible layer reduces stress on the sample surface, effectively protecting it. The three-sided clamping formed by the movable plate 22 and the two circumferential movable abutment parts 30 can adapt to various complex shapes and uneven surfaces of metallographic samples. The pressure distribution part 40 ensures uniform pressure distribution in the vertical direction of the sample, preventing uneven polishing due to uneven force. Furthermore, the fixture has a simple structure, high reliability, and low production cost, meeting the requirements of numerous repetitive polishing experiments.

[0045] The grinding holes on the turntables of commonly used automatic grinding and polishing machines are approximately 30mm diameter cylindrical through holes 111. Therefore, the base 10 is designed as a cylinder with a diameter of 30mm and a height of 20mm. The inner cross-shaped flat-end set stud 21 is an M6×1.0 series stud with a length of 8mm-25mm. The movable plate 22 has a height of 15mm and lengths of 8mm and 18mm respectively. The first connecting piece 12 has symmetrically distributed blind holes with a diameter of 2mm and a depth of 3mm, spaced at 10° intervals.

[0046] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A grinding and polishing fixture, characterized in that, include: A base, wherein the base is configured to form a receiving space; A radially movable abutment component is configured to be radially movable within the receiving space; Two circumferentially movable abutting members are configured to be movably disposed in the receiving space along the circumferential direction of the receiving space, for use together with the radially movable abutting assembly to clamp the sample to be polished.

2. The grinding and polishing fixture according to claim 1, characterized in that, The base includes: Cylindrical parts; The first connector is fixedly connected to one end of the inner wall of the cylindrical component, and the two circumferentially movable abutting components are movably disposed in the receiving space through the first connector; The second connector is fixedly connected to the inner wall of the cylindrical component and is used to assemble the radially movable abutment assembly.

3. The grinding and polishing fixture according to claim 2, characterized in that, The first connector is an arc-shaped component whose two ends are connected to the second connector, and the arc-shaped component forms multiple positioning parts along the circumferential direction; Each of the circumferential movable abutment members is provided with a positioning mating part, and through the cooperation of the positioning mating part and the positioning part, the circumferential movable abutment member is movably disposed on the arc-shaped member.

4. The grinding and polishing fixture according to claim 2, characterized in that, The circumferential movable abutment has an arc surface on the side facing the cylindrical part that matches the shape of the cylindrical part, while the side facing away from the cylindrical part is a flat surface.

5. The grinding and polishing fixture according to claim 4, characterized in that, The circumferential movable abutment is a column, and the side of the column is composed of the arc surface and the plane.

6. The grinding and polishing fixture according to claim 2, characterized in that, The second connector forms a plurality of threaded holes, and the cylindrical component forms a plurality of through holes aligned with the threaded holes; The radially movable abutment assembly includes: The studs are of different lengths and are configured to be threaded into the threaded hole through the through hole and to pass through the threaded hole into the receiving space. Movable plates of different widths, wherein the width direction of the movable plates is perpendicular to the axial direction of the cylindrical component; One of the movable plates abuts against one side surface with a plurality of studs of the same length, and the other side surface abuts against the sample to be polished, thereby clamping the sample to be polished between the two circumferential movable abutting parts and the movable plate through cooperation with the two circumferential movable abutting parts.

7. The grinding and polishing fixture according to claim 6, characterized in that, The longer stud mates with the narrower movable plate; The shorter stud mates with the wider movable plate. The studs are located at both ends of the movable plate and abut against the movable plate.

8. The grinding and polishing fixture according to claim 6, characterized in that, The plurality of threaded holes are arranged at intervals along the length of the second connector.

9. The grinding and polishing fixture according to claim 6, characterized in that, A flexible layer is formed on the side surface of the circumferential movable abutment that is opposite to the cylindrical part and on the surface of the movable plate that faces the sample to be polished.

10. The grinding and polishing fixture according to any one of claims 1-9, characterized in that, The polishing fixture further includes a pressure distribution component, which is disposed at one end of the base and is used to abut against one side end face of the sample to be polished.

11. The grinding and polishing fixture according to claim 10, characterized in that, The corresponding radial inner wall of the base forms a stepped surface; the pressure distribution component is disposed at the stepped surface.

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