Clamp for tension test of ultrahigh-strength material

Abstract

The utility model relates to the technical field of tensile test auxiliary tools, and provides a fixture for a tensile test of an ultrahigh-strength material, which is used for clamping a cylindrical body for the tensile test, the cylindrical body comprises sections I at two ends and a section II in the middle, the diameter of the section I is larger than that of the section II, and the fixture comprises a connecting piece with an opening I, the opening I allows the section II to pass through; when the first opening does not allow the first section to pass through, the connecting piece is buckled on the first section in a split mode, and the first section abuts against the wall face of the first opening. Or when the first opening allows the first section to pass through, a plurality of limiting pieces are further included and used for being placed at the first opening to form a circle in a surrounding mode, the limiting pieces are provided with through grooves, the through grooves of the limiting pieces define a second opening, and the second opening allows the second section to pass through and does not allow the first section to pass through. By means of the technical scheme, the problem that in the prior art, due to the fact that the strength of a test material is high, the test material is directly clamped by a clamping jaw of equipment to be stretched, and the clamping jaw of the equipment can be damaged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile test auxiliary tooling, in particular to a clamp for tensile testing of ultra-high strength materials. Background Art

[0002] There is an ultra-high-strength material that needs to be subjected to a tensile test to test its strength. To facilitate the test, the material is made into a cylindrical body with thick ends and a thin middle. The strength is calculated by stretching the two ends and then measuring the stretched length of the middle part.

[0003] There is a problem now. Because the test material is relatively strong, directly clamping the test material with the jaws of the tensile testing machine for stretching will cause damage to the jaws of the equipment. Therefore, the existing stretching method needs to be improved to solve this problem. Utility Model Content

[0004] The utility model provides a clamp for ultra-high strength material tensile test, which solves the problem in the related art that the clamping jaws of the device may be damaged if the test material is directly clamped by the clamping jaws of the device for stretching due to the high strength of the test material.

[0005] The technical solution of the utility model is as follows:

[0006] A clamp for ultra-high strength material tensile test, used for clamping a cylindrical body for tensile test, the cylindrical body comprises a first segment at both ends and a second segment in the middle, the diameter of the first segment is greater than the diameter of the second segment, comprising:

[0007] A connecting piece, having an opening 1, used to be sleeved on the segment 1, wherein the opening 1 allows the segment 2 to pass through, or allows or does not allow the segment 1 to pass through;

[0008] When the opening 1 does not allow the segment 1 to pass through, the connecting piece is snapped onto the segment 1 in a split manner, and the segment 1 abuts against the wall surface of the opening 1;

[0009] or when the opening allows the segment to pass through, further comprising,

[0010] There are multiple limiting members, which are used to be placed at one place of the opening to form a circle. The limiting members have through grooves. The through grooves of the multiple limiting members form an opening 2. The opening 2 allows the passage of the segment 2 but does not allow the passage of the segment 1. The segment 1 abuts against the wall surface of the opening 2.

[0011] As a further technical solution, the opening 1 is in the shape of a gradually narrowing frustum, and the contact surface contours of the limiting member and the opening 1 are the same.

[0012] As a further technical solution, the connecting member further comprises a through hole 1, wherein the through hole 1 is connected to the opening 1, and the top end of the limiting member comprises an arc-shaped portion, wherein the arc-shaped portion abuts against the inner wall of the through hole 1.

[0013] As a further technical solution, it also includes:

[0014] The limit block has a second through hole, the bottom of the limit block is used to abut against the top of the arc-shaped portion, and the second through hole is used for the first segment to pass through.

[0015] As a further technical solution, the inner wall of the through hole one is provided with a thread, and the limit block thread is arranged on the inner wall of the through hole one.

[0016] As a further technical solution, it also includes:

[0017] A clamping piece is arranged in the through hole one and abuts against the top of the section one. The clamping piece is used to be clamped by a tensile testing machine to perform a tensile test.

[0018] As a further technical solution,

[0019] The clamping piece is threadedly arranged on the inner wall of the first through hole, and the clamping piece has a clamping portion, which extends out of the first through hole.

[0020] As a further technical solution, there are two of each of the connecting member, the limiting block and the clamping member, which are respectively used to be arranged on the two segments.

[0021] The working principle and beneficial effects of the utility model are:

[0022] In the utility model, the test material, i.e., the segments 1 at both ends of the columnar body, are respectively covered with a connecting piece. The opening 1 in the connecting piece can be designed in two ways. The width can be greater than the diameter of the columnar body segment 1, or can be smaller than the diameter of the columnar body segment 1. When the width is smaller than the diameter of the columnar body segment 1, in order to facilitate the connecting piece to be covered in the segment 1, the connecting piece can be made into a split type and snapped onto the segment 1. Then, the clamping jaws of the tensile testing machine can clamp the connecting piece to perform a tensile test, thereby avoiding the situation where the test material damages the clamping jaws.

[0023] Opening one of the connecting piece can also be designed to have a width greater than the diameter of segment one. When in use, segment one of the columnar body can be directly extended into the interior from opening one, and then multiple limiting members are placed one by one in one of the openings. Finally, multiple limiting members form a circle, and segment two can pass through opening two, and segment one is stuck in opening two. In this way, there is no need to design the connecting piece as a split connection, and the limiting members can be directly placed to limit the columnar body, which makes the operation easier and quicker. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the explosion structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the structure of the position limiting member in the utility model in the separated and engaged states;

[0029] In the figure: 1, connecting member, 2, opening one, 3, cylindrical body, 4, segment one, 5, segment two, 6, limiting member, 7, through groove, 8, opening two, 9, through hole one, 10, arc-shaped portion, 11, limiting block, 12, through hole two, 13, clamping member, 14, clamping portion. DETAILED DESCRIPTION

[0030] The following will be combined with 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.

[0031] like Figure 1~Figure 4 As shown, this embodiment proposes a clamp for ultra-high strength material tensile test, which is used to clamp a columnar body 3 for tensile test. The columnar body 3 includes a segment 1 4 at both ends and a segment 2 5 in the middle. The diameter of the segment 1 4 is greater than the diameter of the segment 2 5. The feature is that it includes:

[0032] The connecting member 1 has an opening 2 for being put on the segment 4, and the opening 2 allows the segment 5 to pass through, and allows or does not allow the segment 4 to pass through;

[0033] When the opening 1 2 does not allow the segment 1 4 to pass through, the connector 1 is snapped onto the segment 1 4 in a split manner, and the segment 1 4 abuts against the wall surface at the opening 1 2;

[0034] or when the opening 2 allows the segment 4 to pass through, it also includes,

[0035] There are multiple limiting members 6, which are used to be placed around opening 2. The limiting members 6 have through grooves 7. The through grooves 7 of the multiple limiting members 6 form opening 2 8. Opening 2 8 allows segment 2 5 to pass through, but does not allow segment 1 4 to pass through. Segment 1 4 abuts against the wall surface of opening 2 8.

[0036] In this embodiment, in order to solve the problem in the related art that due to the high strength of the test material, the test material is directly stretched by clamping the test material with the jaws of the equipment, which will cause damage to the jaws of the equipment, the test material, i.e., the segments 4 at both ends of the columnar body 3, are respectively covered with a connecting piece 1, and the opening 2 in the connecting piece 1 has two design methods, which can be greater than the diameter of the segment 4 of the columnar body 3, or less than the diameter of the segment 4 of the columnar body 3. When the width is less than the diameter of the segment 4 of the columnar body 3, in order to facilitate the connection member 1 to be inserted into the segment 4, the connecting piece 1 can be made into a split type and snapped onto the segment 4, and then the jaws of the tensile testing machine can clamp the connecting piece 1 for the tensile test, thereby avoiding the situation where the test material damages the jaws.

[0037] When the width of opening 2 is greater than the diameter of segment 4, segment 4 of columnar body 3 can directly extend from opening 2 to the interior, and then multiple limiting members 6 are placed one by one at opening 2. Finally, multiple limiting members 6 form a circle, segment 2 5 can pass through opening 2 8, and segment 1 4 is stuck at opening 2 8. In this way, there is no need to design connector 1 as a split connection, and limiting members 6 can be directly placed to limit columnar body 3, which makes operation easier and quicker.

[0038] When the limiting member 6 is placed, since the opening 2 is larger than the diameter of the segment 4, the columnar body 3 can be tilted and shaken, so that the limiting member 6 can be placed at the position of the segment 2 5 and clamp the segment 4.

[0039] Furthermore, the opening 1 2 is in a gradually narrowing frustum shape, and the contact surface profiles of the limiting member 6 and the opening 1 2 are the same.

[0040] In this embodiment, the opening 1 2 is configured to be a gradually narrowing frustum, which can satisfy the situation that the opening 1 2 allows the segment 2 5 to pass through but does not allow the segment 1 4 to pass through.

[0041] Furthermore, the connecting member 1 also has a through hole 9 , which is connected to the opening 2 , and the top of the limiting member 6 has an arc-shaped portion 10 , which abuts against the inner wall of the through hole 9 .

[0042] In this embodiment, after the segment 1 4 abuts against the through groove 7 , the arc portion 10 can abut against the inner wall of the through hole 1 9 , thereby ensuring the stability of the stopper 6 and further tightening the columnar body 3 .

[0043] Furthermore, it also includes,

[0044] The limit block 11 has a second through hole 12 , and the inner wall of the through hole 1 9 has a thread. The limit block 11 is threadedly arranged in the through hole 1 9 , the bottom of the limit block 11 abuts against the top of the arc-shaped portion 10 , and the segment 1 4 passes through the second through hole 12 .

[0045] In this embodiment, in order to further enhance the stability of the columnar body 3, a limiting block 11 is used to thread-lock the columnar body 3, and the limiting block 11 is similar to a nut.

[0046] Furthermore, it also includes,

[0047] The clamping member 13 is threadedly disposed in the through hole 9, and its bottom is abutted against the top of the segment 4. The clamping member 13 has a clamping portion 14, which extends out of the through hole 9 and is used to be clamped by a tensile testing machine for tensile testing.

[0048] In this embodiment, the clamping member 13 is a component for the tensile machine to clamp, and at the same time abuts against the end of the columnar body 3 to further enhance the stability of the columnar body 3 .

[0049] Furthermore, there are two connecting members 1, two limiting blocks 11 and two clamping members 13, which are respectively arranged on two sections 1 4.

[0050] In this embodiment, the arrangement structures of the two sections 14 are the same, and the tensile testing machine stretches the two clamping parts 14 toward both sides to perform a tensile test.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamp for ultra-high strength material tensile testing, used for clamping a columnar body (3) for tensile testing, the columnar body (3) comprising a first segment (4) at both ends and a second segment (5) in the middle, the diameter of the first segment (4) being greater than the diameter of the second segment (5), It is characterized in that include, A connecting piece (1) having an opening (2) for being mounted on the segment (4), wherein the opening (2) allows the segment (5) to pass through, or allows or does not allow the segment (4) to pass through; When the opening one (2) does not allow the section one (4) to pass through, the connecting member (1) is snapped onto the section one (4) in a split manner, and the section one (4) abuts against the wall surface at the opening one (2); or when the opening one (2) allows the segment one (4) to pass through, further comprising, There are a plurality of limiting members (6) for being placed around the opening one (2), the limiting members (6) having through grooves (7), the through grooves (7) of the plurality of limiting members (6) forming an opening two (8), the opening two (8) allowing the section two (5) to pass through but not allowing the section one (4) to pass through, the section one (4) abutting against the wall surface of the opening two (8).

2. A fixture for ultra-high strength material tensile testing according to claim 1, It is characterized in that The opening one (2) is in the shape of a gradually narrowing frustum, and the contact surface profile of the limiting member (6) is the same as that of the opening one (2).

3. A fixture for ultra-high strength material tensile testing according to claim 2, It is characterized in that The connecting member (1) further comprises a through hole one (9), wherein the through hole one (9) is connected to the opening one (2), and the top end of the limiting member (6) comprises an arc-shaped portion (10), wherein the arc-shaped portion (10) abuts against the inner wall of the through hole one (9).

4. A fixture for ultra-high strength material tensile testing according to claim 3, It is characterized in that Also includes, The limit block (11) has a second through hole (12), the bottom of the limit block (11) abuts against the top of the arc-shaped portion (10), and the second through hole (12) is used for the first segment (4) to pass through.

5. A fixture for ultra-high strength material tensile testing according to claim 4, It is characterized in that The inner wall of the through hole one (9) is provided with a thread, and the limit block (11) is threadedly arranged on the inner wall of the through hole one (9).

6. A fixture for ultra-high strength material tensile testing according to claim 4, It is characterized in that Also includes, A clamping member (13) is arranged in the through hole one (9) and is used to abut against the top of the section one (4). The clamping member (13) is used to be clamped by a tensile testing machine to perform a tensile test.

7. A fixture for ultra-high strength material tensile testing according to claim 6, It is characterized in that The clamping member (13) is threadedly arranged on the inner wall of the through hole one (9), and the clamping member (13) has a clamping portion (14), and the clamping portion (14) extends out of the through hole one (9).

8. A fixture for ultra-high strength material tensile testing according to claim 6, It is characterized in that The connecting member (1), the limiting block (11) and the clamping member (13) are each provided in two pieces and are respectively used to be arranged on the two sections (4).

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