A variable diameter circular thin slice specimen fixture

Abstract

The utility model provides a variable diameter circular thin sample clamp, which ensures that the circular thin sample will not be damaged or deformed during the clamping and positioning process through a unique structural design. At the same time, during the clamping process, a tight locking structure is formed between the threaded fastener, the sliding arc sheet and the circular thin sample, which effectively prevents the sample from slipping or flying out during operation, improves the clamping stability and operation convenience of the circular thin sample, and ensures the safety of the experimenter. In addition, the utility model has a wide range of applicability, and a slidable component is provided, and samples of different sizes can be firmly clamped through simple adjustment, thereby realizing the flexible use of the clamp and improving the utilization rate of the clamp.

Description

Technical Field

[0001] The utility model relates to the field of electrochemical experimental equipment, in particular to a clamp for clamping and polishing a circular thin slice sample. Background Art

[0002] In electrochemical workstations, Tafe l curve measurement is the most commonly used type of experiment, which can quickly obtain parameters such as material corrosion rate and corrosion current density. More and more scientific research institutions and universities combine Tafe l experiments with conventional immersion experiments.

[0003] Compared with conventional immersion, Tafel curve measurement has a short cycle, high accuracy and simple operation. However, in the processing of circular thin slice samples, the circular thin slices in Tafel curve measurement are not easy to grasp and difficult to grind and polish. The time for preparing circular thin slice samples in the early stage is much longer than the test time. In particular, the circular thin slice samples of Φ14.5×5mm are not easy to grasp during grinding and polishing. If you apply a little force, your hands will be worn or the sample will fly out, which greatly affects the overall experimental efficiency. Utility Model Content

[0004] In order to solve the shortcomings of the prior art and improve the overall experimental efficiency of Tafel curve measurement, the utility model provides a variable diameter circular thin slice sample fixture, comprising: a truncated cone, a through hole is provided inside the truncated cone, at least two penetrating slide grooves are provided on the truncated cone in the radial direction, and a plurality of slide grooves are radially distributed with the through hole of the truncated cone as the center, and the through hole and the slide groove divide the truncated cone into a plurality of truncated cone blocks with fan-shaped shapes;

[0005] At least two sliding arc-shaped pieces, each of which is placed on the upper surface of the truncated table, with its center located on the inner side of the truncated table, and each of which moves along the direction of the sliding groove;

[0006] A sample placement groove, formed by the inner surface of the sliding arc-shaped sheet and the upper surface of the truncated table, for placing a circular thin sheet sample;

[0007] A threaded fastener, including a bolt and a nut, wherein the threaded fastener vertically passes through the sliding arc sheet,

[0008] Wherein, the nut is arranged on the upper surface of the sliding arc piece, and the bolt is vertically installed in the sliding groove.

[0009] In a preferred embodiment, the outer edge of the frustum is a gripping portion.

[0010] In a preferred embodiment, the outer diameter of the truncated cone is larger than the outer diameter of the circular thin slice sample.

[0011] In a preferred embodiment, the thickness of the truncated cone is 5-30 mm, preferably 10-25 mm, and more preferably 15-20 mm.

[0012] Preferably, the diameter of the cone is greater than 14.5 mm, preferably 15-30 mm, and more preferably 18-25 mm.

[0013] In a preferred embodiment, the material of the truncated cone includes one or more combinations of stainless steel, pure copper, polytetrafluoroethylene, aluminum alloy, and 45 steel.

[0014] In a preferred embodiment, the thickness of the circular thin sheet sample is 3-7 mm, preferably 3.5-6 mm, and more preferably 4-5 mm.

[0015] Preferably, the diameter of the circular thin slice sample is 10-25 mm, preferably 15-20 mm, and more preferably 14.5 mm.

[0016] In a preferred embodiment, the width of the slide groove is 2-5 mm, preferably 3-4 mm, and more preferably 3 mm.

[0017] In a preferred embodiment, the clamp is further provided with a movable protrusion, which is fixedly connected to the bottom of the sliding arc piece and can move along the sliding groove to achieve stable fixation of the sliding arc piece.

[0018] Preferably, the movable protrusion is located at the center of the bottom of the sliding arc piece.

[0019] Preferably, the threaded fastener also passes through the movable protrusion.

[0020] In a preferred embodiment, the number of the sliding arc-shaped pieces is 2-6, preferably 3-5, and more preferably 3.

[0021] In a preferred embodiment, the center of the sliding arc piece coincides with the center of the frustum.

[0022] In a preferred embodiment, the sliding arc-shaped pieces are symmetrically distributed with equal intervals.

[0023] Preferably, the clamp is provided with three sliding arc pieces, and the three sliding arc pieces are arranged at three vertices of an equilateral triangle.

[0024] In a preferred embodiment, a rubber pad is further provided on the inner side of the sliding arc-shaped sheet to improve the stability of clamping and reduce the deformation of the circular thin sheet sample during the clamping process.

[0025] Preferably, the material of the rubber pad includes one or more combinations of natural rubber, ethylene propylene diene monomer (EPDM), nitrile rubber, silicone rubber, and chloroprene rubber.

[0026] In a preferred embodiment, the thickness of the sliding arc-shaped sheet is 1-5 mm thinner than that of the circular thin sheet sample, preferably 1.5-4 mm, and more preferably 2-3 mm.

[0027] Preferably, the thickness of the sliding arc-shaped sheet is 1-5 mm, preferably 1.5-4 mm, and more preferably 2-3 mm.

[0028] In a preferred embodiment, the material of the sliding arc piece includes one or more combinations of stainless steel, polytetrafluoroethylene, and pure copper.

[0029] In a preferred embodiment, the sample placement groove is close to the surface area of ​​the circular thin slice sample.

[0030] Preferably, the surface area of ​​the through hole is not greater than the surface area of ​​the circular thin sheet sample.

[0031] In a preferred embodiment, the threaded fastener can not only realize the connection of the truncated cone block, but also realize the fixation of the sliding arc piece in the radial direction of the truncated cone.

[0032] In a preferred embodiment, after the bolts are tightened in the slide grooves, parts of the bolts are exposed on the upper surface of the truncated table, thereby improving the fixing effect on the sliding arc-shaped sheet.

[0033] Preferably, the height of the bolt exposed on the circular platform is not less than the thickness of the sliding arc sheet.

[0034] In a preferred embodiment, the diameter of the nut is slightly larger than the width of the slide slot to prevent the nut from sliding out of the slide slot.

[0035] Preferably, the threaded fastener is a butterfly thread adjusting member, comprising:

[0036] Butterfly knobs, bolts, nuts.

[0037] More preferably, when connecting the truncated cone block and fixing the position of the sliding arc piece, the butterfly knob is rotated to ensure that part of the thread is exposed after the bolt passes through the truncated cone block and the sliding arc piece;

[0038] Screw the nut into the threaded portion of the bolt until the preset tightening force is reached and tighten the bolt into place.

[0039] More preferably, during the tightening process, the axes of the nut and the bolt are kept perpendicular.

[0040] More preferably, a flat washer is provided between the bolt and the nut to prevent the threaded fastener from loosening.

[0041] More preferably, the diameter of the flat washer is larger than the diameter of the nut.

[0042] Compared with the prior art, the beneficial effects of the utility model are:

[0043] The utility model provides a variable diameter circular thin sample clamp, which ensures that the circular thin sample will not be damaged or deformed during the clamping and positioning process through a unique structural design. At the same time, during the clamping process, a tight locking structure is formed between the threaded fastener, the sliding arc sheet and the circular thin sample, which effectively prevents the sample from slipping or flying out during operation, improves the clamping stability and operation convenience of the circular thin sample, and ensures the safety of the experimenter. In addition, the utility model has a wide range of applicability, and a slidable component is provided, so that circular thin samples of different sizes can be firmly clamped through simple adjustment, thereby realizing the flexible use of the clamp and improving the utilization rate of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 It is a schematic structural diagram of a variable diameter circular thin sheet sample fixture in an embodiment of the utility model.

[0046] Figure 2 It is a schematic diagram of the three-dimensional structure of the electrochemical circular thin sheet sample in the embodiment of the utility model.

[0047] Figure 3 This is an installation diagram of a threaded fastener in an embodiment of the utility model.

[0048] Figure 4 It is a top view of the variable diameter circular thin slice sample fixture in the embodiment of the utility model.

[0049] The following are the descriptions of the reference numerals:

[0050] 1. Round table; 2. Sliding arc piece; 3. Slide groove; 4. Sample placement groove; 5. Threaded fastener; 51. Butterfly knob; 52. Bolt; 53. Flat washer; 54. Nut; 6. Movable protrusion; 7. Rubber pad. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0055] This embodiment provides a variable diameter circular thin slice sample fixture, wherein the size of the circular thin slice sample is Φ14.5×5mm, and the structure is as follows: Figure 2 shown.

[0056] The structure of the clamp is as follows Figure 1 As shown, including:

[0057] The truncated table 1 has a through hole inside and three through-grooves 3 in the radial direction. The grooves 3 are radially distributed with the through hole of the truncated table 1 as the center. The through hole and the grooves 3 divide the truncated table 1 into three truncated table blocks with fan-shaped shapes. The outer edge of the truncated table 1 is designed as a gripping part to facilitate the user to operate and move the clamp. The thickness of the truncated table 1 is 15-20 mm and the diameter is 18-25 mm. The material of the truncated table 1 is 45 steel to ensure the strength and durability of the clamp.

[0058] Three sliding arc pieces 2 are placed on the surface of the truncated table 1 and directly above the slide groove 3. The center of the circle is located inside the truncated table 1 and coincides with the center of the circle of the truncated table, which can ensure that when the circular thin sample is clamped, the circular thin sample can be evenly stressed, reducing the possibility of deformation and damage. The three sliding arc pieces 2 move along the direction of the slide groove 3.

[0059] The three sliding arc pieces 2 are located at the three corners of an equilateral triangle to achieve uniform clamping. The thickness of the sliding arc piece 2 is 2-3 mm. This design ensures that when clamping a circular thin sheet sample, the sliding arc piece 2 can provide sufficient pressure without over-compressing the circular thin sheet sample.

[0060] The central position of the bottom of the sliding arc piece 2 is also fixedly connected with a movable protrusion 6, which moves freely in the slide groove 3. The existence of the movable protrusion 6 increases the stability of the sliding arc piece 2 and prevents it from deviating from the slide groove 3 during the clamping process.

[0061] The sliding arc piece 2 and the movable protrusion 6 are also provided with through holes, and threads are provided in the through holes for matching with the bolts of the threaded fastener 5 .

[0062] The material of the sliding arc piece 2 matches that of the round table, and is made of 45 steel to ensure the strength and durability of the overall structure. A rubber pad 7 is provided on the inner side of the sliding arc piece 2 to improve the stability of the clamping and reduce the deformation of the circular thin sheet sample. The material of the rubber pad 7 is ethylene propylene diene monomer (EPDM).

[0063] The sample placement groove 4 is composed of the inner surfaces of the three sliding arc pieces 2 and the upper surface of the truncated table 1, and is used to place and clamp the circular thin sample. Since the sliding arc piece 2 can move along the slide groove 3, the size of the sample placement groove 4 can be adjusted according to the diameter of the circular thin sample to achieve variable diameter clamping.

[0064] The threaded fastener 5 vertically passes through the center of the sliding arc piece 2 and the movable protrusion 6.

[0065] The threaded fastener 5 is a butterfly thread adjusting member, including a butterfly knob 51 , a bolt 52 , a flat washer 53 , and a nut 54 .

[0066] The nut 54 is arranged on the upper surface of the sliding arc-shaped sheet 2, and the width of the nut 54 is greater than the width of the sliding groove 3. The bolt 52 is made of polytetrafluoroethylene.

[0067] When connecting the truncated cone block and fixing the position of the sliding arc piece 2, the butterfly knob 51 is rotated to make the bolt 52 pass through the truncated cone block and the sliding arc piece 2, and ensure that part of the thread is exposed;

[0068] Screw the nut 54 into the threaded portion of the bolt 52 until the preset tightening force is reached, tightening the bolt in place;

[0069] A flat washer 53 is disposed between the bolt 52 and the nut 54 . The diameter of the flat washer 53 is larger than the diameter of the nut 54 , and is used to prevent the threaded fastener 5 from loosening.

[0070] During the tightening process, the nut 54 is kept perpendicular to the axis of the bolt 52 .

[0071] When the sliding arc piece 2 needs to be fixed, the circular thin sheet sample only needs to be placed in the sample placement groove 4, and then the bolt 52 is tightened to make it cooperate with the nut 54. At this time, a stable locking state is formed between the threaded fastener 5, the sliding arc piece 2, and the circular thin sheet sample, and the circular thin sheet sample can be firmly clamped.

[0072] Steps:

[0073] The steps for using the variable diameter circular thin slice specimen fixture of this embodiment are as follows:

[0074] The circular thin slice sample is placed in the sample placement groove 4, and the three sliding arc pieces 2 are adjusted simultaneously to move along the slide groove 3 toward the center of the truncated table 1, so that the sliding arc pieces 2 tightly clamp the circular thin slice sample.

[0075] After adjusting the position, use the threaded fastener 5 to rotate the butterfly knob 51 to make the bolt 52 pass through the truncated cone block and the sliding arc piece 2, ensuring that part of the thread is exposed;

[0076] Screw the nut 54 into the threaded portion of the bolt 52 until the preset tightening force is reached, tightening the bolt in place;

[0077] A flat washer 53 is disposed between the bolt 52 and the nut 54 . The diameter of the flat washer 53 is larger than the diameter of the nut 54 and is used to prevent the threaded fastener 5 from loosening.

[0078] During the tightening process, the nut 54 is kept perpendicular to the axis of the bolt 52 .

[0079] At this time, a stable locking state is formed among the threaded fastener 5, the sliding arc-shaped piece 2, and the circular thin-sheet sample, thereby completing the clamping of the circular thin-sheet sample.

[0080] During grinding and polishing, the round table 1 of the hand-held fixture is away from the other end surface of the sliding arc piece 2, which can effectively avoid grinding the hands and ensure uniform force, thereby improving the grinding and polishing efficiency and safety.

[0081] In summary, this embodiment provides a variable diameter circular thin sample clamp, which ensures that the circular thin sample will not be damaged or deformed during the clamping and positioning process through a unique structure and material design. At the same time, during the clamping process, a tight locking structure is formed between the threaded fastener, the sliding arc sheet and the circular thin sample, which effectively prevents the circular thin sample from slipping or flying out during operation, improves the clamping stability and operation convenience of the circular thin sample, and ensures the safety of the experimenter. In addition, the utility model has a wide range of applicability, and a slidable component is provided, and circular thin samples of different sizes can be firmly clamped through simple adjustment, which realizes the flexible use of the clamp and improves the utilization rate of the clamp.

[0082] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A variable diameter circular thin sheet specimen fixture, characterized in that: include: A truncated cone, wherein a through hole is provided inside the truncated cone, and the truncated cone is provided with at least two penetrating chute grooves in the radial direction, and a plurality of chute grooves are radially distributed with the through hole of the truncated cone as the center, and the through hole and the chute groove divide the truncated cone into a plurality of truncated cone blocks having a fan-shaped shape; At least two sliding arc-shaped pieces, each of which is placed on the upper surface of the truncated table, with its center located on the inner side of the truncated table, and each of which moves along the direction of the sliding groove; A sample placement groove, formed by the inner surface of the sliding arc-shaped sheet and the upper surface of the truncated table, for placing a circular thin sheet sample; A threaded fastener, including a bolt and a nut, wherein the threaded fastener vertically passes through the sliding arc sheet, Wherein, the nut is arranged on the upper surface of the sliding arc piece, and the bolt is vertically installed in the sliding groove.

2. The clamp according to claim 1, characterized in that: The thickness of the truncated cone is 15-20 mm.

3. The clamp according to claim 1, characterized in that: The diameter of the truncated cone is greater than 14.5 mm.

4. The clamp according to claim 1, characterized in that: The material of the truncated table includes one or more combinations of stainless steel, pure copper, polytetrafluoroethylene, aluminum alloy, and 45 steel.

5. The clamp according to claim 1, characterized in that: The clamp is also provided with a movable protrusion, which is fixedly connected to the bottom of the sliding arc piece and can move along the sliding groove; The movable protrusion is located at the center of the bottom of the sliding arc piece.

6. The clamp according to claim 1, characterized in that: The clamp is provided with three sliding arc pieces, and the three sliding arc pieces are arranged at three vertices of an equilateral triangle.

7. The clamp according to claim 1, characterized in that: A rubber pad is also provided on the inner side of the sliding arc-shaped piece.

8. The clamp according to claim 1, characterized in that: The thickness of the sliding arc-shaped sheet is 2-3 mm.

9. The clamp according to claim 1, characterized in that: The surface area of ​​the through hole is no greater than the surface area of ​​the circular thin slice sample.

10. The clamp according to claim 1, characterized in that After the bolts are tightened in the slide grooves, parts of the bolts are exposed on the upper surface of the round table.

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