Sample grinding and cutting clamp

Abstract

The utility model relates to a clamp for grinding and cutting a sample. The clamp comprises a sleeve, a screwing body and a plurality of screw rods, the sleeve is vertically through so as to accommodate the sample and the screwing body; the plurality of screw rods are in threaded connection with the outer wall of the sleeve at intervals in the circumferential direction so as to extend into the sleeve in the horizontal direction to clamp the circumferential wall of the sample; the screwing body is in threaded connection in the sleeve and can be used for adjusting the thickness of one end surface, protruding out of the sleeve, of the sample by lifting and pressing the sample. The device has the beneficial effects that the plurality of screw rods can clamp samples with different shapes, such as a round shape, a square shape and an irregular peripheral wall shape. And the thickness of the sample extending out of the clamp can be flexibly adjusted by screwing the screwing body so as to grind and polish the to-be-ground surface of the sample. Under the common clamping of the plurality of screws to the peripheral wall of the sample and the screwing body to the back surface of the to-be-ground surface of the sample, the flatness of the to-be-ground surface in the sample grinding and polishing process is ensured. Only the screwing body and the screw need to be screwed, operation is convenient, and compared with a traditional sample inlaying mode, efficiency can be improved, and cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallographic samples, in particular to a sample grinding and sectioning fixture. Background Art

[0002] There are two main methods for metallographic sample preparation: (1) For larger samples, the sample end face is directly hand-held and polished after being processed into a suitable size; (2) For hot-rolled or cold-rolled plates that are thin and difficult to hold, the sample end face is ground after being inlaid with inlay powder to form a larger metallographic sample.

[0003] However, direct hand-held grinding and polishing is inefficient. For mounting smaller specimens, hot mounting requires specialized specimen mounting equipment and accessories, and the mounting process requires a 20-30 minute wait. Cold mounting, while not requiring specialized mounting equipment, can still take up to 12 hours, making it very inefficient.

[0004] Therefore, designing a fixture that can directly clamp smaller specimens without the need for inlay is very helpful in improving work efficiency. Utility Model Content

[0005] (1) Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a sample grinding and sectioning fixture, which solves the technical problems that the traditional method of directly hand-held grinding and polishing samples is inefficient, and the preparation time and efficiency of embedding samples into metallographic samples is long and inefficient.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0009] The embodiment of the utility model provides a sample grinding and sectioning fixture, comprising a sleeve, a screw body and a plurality of screws;

[0010] The sleeve is penetrated from top to bottom to accommodate the sample and the screw body;

[0011] The plurality of screws are circumferentially spaced and threadedly connected to the outer wall of the sleeve so as to extend into the sleeve in a horizontal direction to clamp the peripheral wall of the sample;

[0012] The screwing body is threadedly connected in the sleeve and can press the sample by lifting and lowering to adjust the thickness of the sample protruding from one end surface of the sleeve.

[0013] According to the present invention, the screwing body protrudes from one end of the sleeve and extends radially outward to form an annular pressing platform, and the other end of the screwing body can press the sample;

[0014] The other end of the screwing body is a plane.

[0015] According to the utility model, the sleeve is a circular cylinder.

[0016] According to the utility model, two pads are also included;

[0017] When a plurality of cube-shaped specimens are arranged side by side in the sleeve, the two pads can be respectively placed at both ends of the plurality of specimens arranged side by side, and the plurality of screws can clamp the two ends of the plurality of specimens by pressing against the two pads.

[0018] According to the utility model, the pad is a soft iron pad.

[0019] According to the present invention, the screwing body is a magnetic screwing body capable of adsorbing the sample made of iron.

[0020] According to the utility model, it also includes a plurality of swing heads;

[0021] The plurality of swing heads correspond to the plurality of screw rods one by one. The swing head is hinged to one end of the screw rod inserted into the sleeve and can rotate around a vertical axis. Each swing head can provide two contact points for clamping the peripheral wall of the sample.

[0022] According to the utility model, it also includes a plurality of brackets;

[0023] The plurality of brackets are arranged in an annular manner and spaced apart, and are inserted into the inner wall of the sleeve so as to be horizontally movable relative to the sleeve;

[0024] The plurality of screw rods, the plurality of swing heads and the plurality of brackets correspond to each other one by one, the screw rods can press the brackets, and the swing heads can be hinged to the brackets so as to rotate around a vertical axis;

[0025] When the screw moves horizontally relative to the sleeve, the screw can drive the swing head to move horizontally through the bracket and clamp the peripheral wall of the sample.

[0026] According to the present invention, the bracket is a U-shaped bracket, and the opening of the bracket faces the outside of the sleeve;

[0027] The inner wall of the sleeve is provided with a plurality of limiting holes for inserting the two ends of the bracket, and the limiting holes are oriented horizontally;

[0028] The screw rod is capable of pressing against one side of the bracket;

[0029] The swing head includes two pressure rods with an included angle, one end of the two pressure rods is hinged to the other side of the bracket through a hinge seat, and the other ends of the two pressure rods form the contact point.

[0030] According to the present invention, the number of the screw rods is four, and every two adjacent screw rods are arranged at 90° along the circumferential direction.

[0031] (3) Beneficial effects

[0032] The beneficial effects of the present invention are as follows: the present invention is a sample grinding and sectioning fixture, when in use, by rotating different screws to adjust the length of the screws extending into the sleeve, so that multiple screws can be suitable for clamping samples of different shapes including round, square and irregular circumferential wall shapes. By rotating the screw body, the thickness of the sample extending out of the sleeve can be flexibly adjusted to facilitate the grinding and polishing of the surface to be ground of the sample. Under the joint clamping of the multiple screws on the circumferential wall of the sample and the screw body on the back of the surface to be ground of the sample, the clamping stability of thinner samples can be guaranteed, the flatness of the surface to be ground of the sample during the grinding and polishing process is guaranteed, and the surface to be ground of the sample to be adapted to be polished is avoided. At the same time, the structure of the sample grinding and sectioning fixture is simple, and when clamping the sample, only the screw body and the screw need to be rotated, which is easy to operate. Compared with the traditional method of mounting samples, it can improve efficiency and save costs. Furthermore, after the sample is ground and sectioned, it can be directly observed under a metallographic microscope without removing the sample from the sample grinding fixture. If it is found that the grinding effect of the sample is not good, it can be directly ground again, saving the time of re-sampling and clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a sectional front view of the sample grinding and sectioning fixture of the present utility model;

[0034] Figure 2 This is a cross-sectional diagram of the specimen grinding and sectioning fixture when the specimen is clamped;

[0035] Figure 3 for Figure 2 Cross-sectional view from above when clamping a square specimen;

[0036] Figure 4 for Figure 2 A cross-sectional view from above when clamping an irregularly shaped specimen;

[0037] Figure 5 for Figure 2 The sectional front view when clamping multiple square specimens arranged side by side;

[0038] Figure 6 for Figure 5 Bottom sectional view of

[0039] Figure 7 This is a cross-sectional view from above when the specimen grinding and sectioning fixture is set with a swing head and clamping a square specimen;

[0040] Figure 8This is a top-down cross-sectional view of the specimen grinding and sectioning fixture when the swing head is set to clamp an irregularly shaped specimen.

[0041] [Description of Reference Numerals]

[0042] 1: sleeve; 11: through hole; 12: limit hole;

[0043] 2: twisting body; 21: pressing platform;

[0044] 3: screw;

[0045] 4: Pad;

[0046] 5: bracket;

[0047] 6: connecting rod;

[0048] 7: Swing head;

[0049] A: Sample. DETAILED DESCRIPTION

[0050] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 and 2 , the orientation is used as reference.

[0051] See also Figure 1-8 A sample grinding and sectioning fixture proposed in an embodiment of the present invention includes a sleeve 1, a screwing body 2 and a plurality of screws 3.

[0052] The sleeve 1 is threaded vertically to accommodate the specimen A and the screw body 2. Multiple screws 3 are threadedly connected to the outer wall of the sleeve 1 at circumferential intervals, extending horizontally into the sleeve 1 to clamp the circumference of the specimen A. The screw body 2 is threaded into the sleeve 1 and can be raised and lowered to press against the specimen A to adjust the thickness of the surface to be ground protruding from one end of the sleeve 1.

[0053] During use, different screws 3 are screwed to adjust the length of the screws 3 extending into the sleeve 1, so that multiple screws 3 can be used to clamp specimens A of different shapes, including circular, square, and irregular circumferential wall shapes. By screwing the screw body 2, the thickness of the specimen A extending out of the sleeve 1 can be flexibly adjusted to facilitate the grinding and polishing of the surface to be ground of the specimen A. With the joint clamping of the multiple screws 3 on the circumferential wall of the specimen A and the screw body 2 on the back of the surface to be ground of the specimen A, the clamping stability of the thinner specimen A can be ensured, the flatness of the surface to be ground of the specimen A during the grinding and polishing process is ensured, and the surface to be ground of the specimen A is avoided from being skewed. At the same time, the structure of the specimen grinding and sectioning fixture is simple, and when clamping the specimen A, only the screw body 2 and the screw 3 need to be screwed, which is easy to operate. Compared with the traditional method of mounting specimens, it can improve efficiency and save costs. Furthermore, after the grinding and sectioning of sample A is completed, it can be directly observed under a metallographic microscope without removing sample A from the sample grinding and sectioning fixture. When it is found that the grinding effect of the grinding surface of sample A is poor, it can be directly ground again, saving the time of re-sampling and re-clamping.

[0054] It should be noted that this sample grinding and sectioning fixture is particularly suitable for clamping sample A made of metal material.

[0055] Furthermore, the specific method of using this sample grinding and sectioning fixture is as follows:

[0056] S1: First, the back side of the surface to be ground of the sample A is coarsely ground until there are few impurities and a certain degree of flatness is achieved to facilitate the subsequent pressing of the screwing body 2.

[0057] S2: Rotate the screw body 2 in the first direction so that the screw body 2 moves axially outward relative to the sleeve 1 to a set height, and rotate the multiple screws 3 in the second direction so that the multiple screws 3 move radially outward relative to the sleeve 1 to a set position, so that space for inserting the sample A is reserved in the sleeve 1.

[0058] S3: Place sample A in sleeve 1.

[0059] S4: Rotate the screw body 2 in the opposite direction of the first direction to move the screw body 2 inward relative to the axial direction of the sleeve 1 to press against the back of the sample A, thereby adjusting the thickness of the sample A protruding from one end surface of the sleeve 1.

[0060] S5: Rotate the plurality of screws 3 in the opposite direction along the second direction so that the plurality of screws 3 move inwardly relative to the radial direction of the sleeve 1 to clamp the peripheral wall of the sample A.

[0061] In step S5 , the number of screws 3 provided and the number of screws 3 to be tightened may be adjusted accordingly according to the size and shape of the sample A.

[0062] See also Figure 1 and 2Furthermore, multiple screws 3 are arranged at the lower part of the sleeve 1, the sample A can protrude from the lower end of the sleeve 1, and the multiple screws 3 can clamp the peripheral wall of the sample A located in the sleeve 1.

[0063] See also Figure 1 Furthermore, one end of the screwing body 2 protrudes from the sleeve 1 and extends radially outward to form an annular pressing platform 21, and the other end of the screwing body 2 can press the surface of the sample A to be ground.

[0064] When this specimen profiling fixture is used in conjunction with an automated grinder to automatically polish specimen A, the pressing platform 21 is used to receive the automatic grinder's indenter and provides a large pressing surface, enabling the indenter to stably press specimen A against the grinding and polishing table. When specimen A needs to be manually polished, sleeve 1 can be directly grasped and pressed against the grinding and polishing table. This specimen profiling fixture is therefore suitable for both automated profiling and manual polishing.

[0065] Specifically, the other end of the screwing body 2 is a plane, so that the sample A pressed by it can be in a horizontal state.

[0066] Optionally, when the sample A is a magnetic body such as steel, the screwing body 2 is a magnetic screwing body capable of adsorbing the iron sample A, so that the screwing body 2 can fix the sample A and improve the clamping effect on the sample A. The screwing body 2 is preferably a permanent magnet.

[0067] See also Figure 1 and 2 Preferably, the sleeve 1 is a circular cylinder so that the sleeve 1 can be held conveniently during manual grinding and sectioning.

[0068] Optionally, the sleeve 1 is made of a wear-resistant material, and the sleeve 1 is preferably a metal sleeve to improve its strength in use.

[0069] See also Figure 5 and 6 Furthermore, the sample grinding and sectioning fixture also includes two pads 4.

[0070] When multiple cubic specimens A are placed side by side within the sleeve 1, two pads 4 can be placed at each end of the multiple specimens A. Multiple screws 3 can press against the two pads 4 to clamp the ends of the multiple specimens A, allowing simultaneous milling and sectioning of multiple specimens A and improving milling efficiency. Furthermore, the screws 3 indirectly clamp the specimens A through the pads 4, protecting them from damage and distributing the preload applied by the screws 3 across the entire surface of the pads 4, increasing the clamping area of ​​the specimens A and ensuring a more secure grip. At least one screw 3 can press against a pad 4 to clamp one end of the specimen A.

[0071] It should be noted that when the present specimen grinding and sectioning fixture simultaneously clamps a plurality of cube-shaped specimens A, the shapes and sizes of the specimens A may be the same or different, as long as the sizes and shapes are similar.

[0072] Preferably, the pad 4 is a soft iron pad, which is made of a relatively soft material to avoid damaging the sample A.

[0073] See also Figure 7 and 8 Furthermore, the sample grinding and sectioning fixture also includes multiple swing heads 7.

[0074] The plurality of swing heads 7 correspond to the plurality of screw rods 3 one by one. The swing head 7 is hinged to one end of the screw rod 3 extending into the sleeve 1 and can rotate around a vertical axis. Each swing head 7 can provide two contact points for clamping the peripheral wall of the sample A.

[0075] When the screw 3 drives the corresponding oscillating head 7 to move horizontally until one contact point of the oscillating head 7 contacts the peripheral wall of specimen A, the specimen A can push the oscillating head 7 in the opposite direction to rotate about the vertical axis relative to the screw 3, so that the two contact points simultaneously contact and clamp the peripheral wall of specimen A. This arrangement can provide two contact points for clamping specimen A when rotating one screw 3, reducing the number of screws 3 that need to be turned and simplifying operation.

[0076] Furthermore, the sample grinding and sectioning fixture further includes a plurality of brackets 5 .

[0077] The plurality of brackets 5 are arranged in an annular pattern and are inserted into the inner wall of the sleeve 1 so as to be horizontally movable relative to the sleeve 1. The plurality of screws 3, the plurality of swing heads 7 and the plurality of brackets 5 correspond one to one. The screws 3 can press against the brackets 5, and the swing heads 7 can be hinged to the brackets 5 so as to be rotatable around a vertical axis.

[0078] When the screw 3 moves horizontally relative to the sleeve 1 , the screw 3 can drive the swing head 7 to move horizontally through the bracket 5 , so that the swing head 7 can rotate around the vertical axis relative to the bracket 5 and clamp the peripheral wall of the sample.

[0079] Specifically, the bracket 5 is a U-shaped frame, with its opening facing the exterior of the sleeve 1. The inner wall of the sleeve 1 defines multiple horizontally oriented retaining holes 12 for insertion of the two ends of the bracket 5. The screw 3 is capable of pressing against one side of the bracket 5. The swing head 7 comprises two angled pressure rods, one end of which is hinged to the other side of the bracket 5 via a hinged seat, with the other ends of the two rods forming a contact point.

[0080] When the screw 3 rotates and pushes the bracket 5 to move in the horizontal direction, the two ends of the bracket 5 can move along the limit hole 12 to limit the movement of the bracket 5 in the horizontal direction, preventing the screw 3 from driving the bracket 5 to rotate synchronously in the horizontal direction, so as to ensure that the swing head 7 can move horizontally and rotate around the vertical axis to clamp the surrounding wall of the sample.

[0081] Preferably, the number of screws 3 is four, and every two adjacent screws 3 are arranged at 90° along the circumferential direction, so that the number of swing heads 7 matched with the screws 3 is also four, and every two adjacent swing heads 7 are arranged at 90° along the circumferential direction to stably clamp the four sides of the sample A.

[0082] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0083] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0084] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A sample grinding and sectioning fixture, characterized in that: It comprises a sleeve (1), a screwing body (2) and a plurality of screw rods (3); The sleeve (1) is through-through from top to bottom so as to accommodate the sample (A) and the screwing body (2); The plurality of screw rods (3) are threadedly connected to the outer wall of the sleeve (1) at circumferential intervals so as to be able to extend into the sleeve (1) in a horizontal direction to clamp the peripheral wall of the sample (A); The screwing body (2) is threadedly connected in the sleeve (1) and can press the sample (A) by lifting and lowering to adjust the thickness of the sample (A) protruding from one end surface of the sleeve (1).

2. The sample grinding and sectioning fixture according to claim 1, characterized in that: One end of the screwing body (2) protrudes from the sleeve (1) and extends radially outward to form an annular pressing platform (21), and the other end of the screwing body (2) is capable of pressing the sample (A); The other end of the screwing body (2) is a plane.

3. The sample grinding and sectioning fixture according to claim 1, characterized in that: The sleeve (1) is a circular cylinder.

4. The sample grinding and sectioning fixture according to claim 1, characterized in that: Also includes two pads (4); When a plurality of the cube-shaped specimens (A) are arranged side by side and placed in the sleeve (1), the two pads (4) can be respectively placed at the two ends of the plurality of the specimens (A) arranged side by side, and the plurality of screw rods (3) can clamp the two ends of the plurality of the specimens (A) by pressing against the two pads (4).

5. The sample grinding and sectioning fixture according to claim 4, characterized in that: The pad (4) is a soft iron pad.

6. The sample grinding and sectioning fixture according to claim 1, characterized in that: The screw body (2) is a magnetic screw body capable of adsorbing the iron sample (A).

7. The sample grinding and sectioning fixture according to claim 1, characterized in that: Also includes a plurality of oscillating heads (7); The plurality of oscillating heads (7) correspond to the plurality of screw rods (3) in a one-to-one manner. The oscillating heads (7) are hinged to one end of the screw rod (3) inserted into the sleeve (1) and can be rotatable around a vertical axis. Each of the oscillating heads (7) can provide two contact points for clamping the peripheral wall of the sample (A).

8. The sample grinding and sectioning fixture according to claim 7, characterized in that: Also included are a plurality of brackets (5); The plurality of brackets (5) are arranged at intervals in a ring shape and are inserted into the inner wall of the sleeve (1) so as to be horizontally movable relative to the sleeve (1); The plurality of screw rods (3), the plurality of swing heads (7) and the plurality of brackets (5) correspond to each other one by one, the screw rods (3) can press the brackets (5), and the swing heads (7) can be hinged on the brackets (5) so as to rotate around a vertical axis; When the screw (3) moves horizontally relative to the sleeve (1), the screw (3) can drive the swing head (7) to move horizontally through the bracket (5) and clamp the peripheral wall of the sample.

9. The sample grinding and sectioning fixture according to claim 8, characterized in that: The bracket (5) is a U-shaped bracket, and the opening of the bracket (5) faces the outside of the sleeve (1); The inner wall of the sleeve (1) is provided with a plurality of limiting holes (12) for inserting the two ends of the bracket (5), and the limiting holes (12) are horizontally oriented; The screw rod (3) is capable of pressing against one side of the bracket (5); The swing head (7) comprises two pressure rods with an included angle, one end of the two pressure rods is hinged to the other side of the bracket (5) through a hinge seat, and the other ends of the two pressure rods form the contact point.

10. The sample grinding and sectioning fixture according to any one of claims 7 to 9, characterized in that: The number of the screw rods (3) is four, and every two adjacent screw rods (3) are arranged at 90 degrees along the circumferential direction.

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