CN211553565U - Z-direction stretching sample clamping device - Google Patents
Z-direction stretching sample clamping device Download PDFInfo
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- CN211553565U CN211553565U CN202020128766.9U CN202020128766U CN211553565U CN 211553565 U CN211553565 U CN 211553565U CN 202020128766 U CN202020128766 U CN 202020128766U CN 211553565 U CN211553565 U CN 211553565U
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Abstract
The utility model discloses a Z is to tensile sample clamping device belongs to metal material mechanical properties test technical field. The utility model provides a Z-direction tensile sample clamping device, which comprises a connecting rod and a sample clamping piece, wherein the connecting rod is used for being engaged with a chuck of a testing machine; the sample fastener is used for placing the sample, and the sample fastener is connected in connecting rod one end, and sample fastener side direction runs through and sets up the through-hole that holds the sample exposed core, and the draw-in groove that supplies sample card to go into is seted up to the tip that the connecting rod was kept away from to the through-hole. The utility model provides a Z can be very conveniently will treat the tensile sample both ends and place the block on two upper and lower Z are to tensile sample clamping device, then can directly test, and convenient and fast has solved Z effectively and has carried out the difficult problem of thickness direction tensile test to the steel sheet.
Description
Technical Field
The utility model relates to a metallic material mechanical properties tests technical field, especially relates to a Z is to tensile sample clamping device.
Background
The Z-direction tensile test evaluates the lamellar tearing resistance of the steel sheet by detecting the shrinkage performance in the thickness direction. The existing clamping mode mainly has two types: 1. directly clamping two end parts of a sample by adopting a clamping block of a testing machine; 2. the thickness of the steel plate is increased through surfacing, and a long-size sample is prepared and used for clamping a testing machine.
The length requirement of the tensile testing machine for clamping the sample is as follows: the sample holding length is greater than or equal to 3/4 (i.e., the sample holding length is at least 30mm) of the length of the block of the testing machine. The thickness of the conventional Z-direction steel plate is 20mm-60mm, the clamping length of the prepared tensile sample is only 5mm-20mm, and the clamping requirement of a testing machine cannot be met. By adopting the 1 st clamping mode, the clamping blocks of the testing machine are not uniformly stressed, the two clamping blocks are inclined into an A shape, the end part of a sample is easy to deform and slide in the stretching process, the test cannot be finished, and the service life of the clamping part of the testing machine is seriously influenced; by adopting the mode 2, the surfacing treatment needs to be carried out on the surface of the inspection steel plate, the workload is increased, the processing period is prolonged, and the test sample is broken at the position of a welding seam and a heat affected zone possibly due to poor welding and other reasons in the test process, so that the test is invalid.
Therefore, it is desirable to provide a clamping device for a Z-direction stretching sample to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a Z is to tensile sample clamping device, and convenient to use can effectively solve Z and carry out the difficult problem of thickness direction tensile test to the steel sheet.
In order to realize the purpose, the following technical scheme is provided:
the utility model provides a Z is to tensile sample clamping device, include:
the connecting rod is used for being in snap-in connection with the chuck of the testing machine;
the sample fastener for place the sample, the sample fastener is connected connecting rod one end, the sample fastener side direction runs through and sets up the through-hole that holds the sample exposed core, the through-hole is kept away from the draw-in groove that supplies the sample card to go into is seted up to the tip of connecting rod.
Furthermore, the joint of the connecting rod and the sample clamping piece is in arc transition connection.
Further, the through hole is square.
Further, the clamping groove is a U-shaped opening.
Furthermore, the inner wall of the through hole is convexly provided with a clamping edge at the opening of the clamping groove, and the clamping edge is configured to clamp and position the sample clamped into the clamping groove.
Furthermore, an anti-skid structure is arranged on the inner wall of the through hole.
Furthermore, the anti-skid structure is a convex point or an anti-skid line.
Further, the connecting rod is made of a material with the hardness ranging from 40HRC to 45 HRC.
Further, the sample clamping piece is made of a material with the bearing force being greater than or equal to 50 KN.
Further, the sample clamping piece is made of a quenched and tempered 42CrMo material.
Compared with the prior art, the utility model provides a Z can be very conveniently will treat the tensile sample both ends and place the block on two upper and lower Z are to tensile sample clamping device, then can directly test, and convenient and fast effectively solves Z and carries out the difficult problem of thickness direction tensile test to the steel sheet.
Drawings
Fig. 1 is a schematic structural diagram of a Z-direction stretching sample holding device in an embodiment of the present invention;
fig. 2 is a side view of a Z-direction tensile sample holding device in an embodiment of the present invention.
Reference numerals:
1-a connecting rod; 2-a sample clamping piece; 21-a through hole; 22-card slot.
Detailed Description
In order to make the technical problems, technical solutions adopted and technical effects achieved by the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment provides a Z-direction tensile sample clamping device, which includes a connecting rod 1 and a sample clamping piece 2, wherein the connecting rod 1 is used for being snapped with a chuck of a testing machine; sample fastener 2 is used for placing the sample, and sample fastener 2 is connected in connecting rod 1 one end, and 2 side directions of sample fastener run through and offer the through-hole 21 that holds the sample exposed core, and the draw-in groove 22 that supplies the sample card to go into is offered to the tip that connecting rod 1 was kept away from to through-hole 21.
The Z that this embodiment provided can be very conveniently will treat tensile sample both ends and place the block on two Z are to tensile sample clamping device from top to bottom, then can directly test, and convenient and fast effectively solves Z and carries out the difficult problem of thickness direction tensile test to the steel sheet.
Preferably, referring to fig. 1, the joint of the connecting rod 1 and the sample clamping piece 2 adopts an arc transition connection, so as to avoid the fracture of the Z-direction tensile sample clamping device caused by local stress concentration when the Z-direction tensile sample clamping device bears axial tension.
Further preferably, with reference to fig. 1 and 2, the through hole 21 is square, the clamping groove 22 is a U-shaped opening, when a sample to be stretched is placed, the sample clamping section is fixed in the square through hole 21, the sample reduction section is clamped in the clamping groove 22, and the sample clamping member 2 are seamlessly combined through the design of the U-shaped opening.
Optionally, in order to prevent the sample to be stretched from sliding out of the clamping groove 22, a clamping edge is convexly disposed on the inner wall of the through hole 21 at the opening of the clamping groove 22, and the clamping edge is configured to clamp and position the sample clamped into the clamping groove 22, so that the cylindrical end of the sample is clamped between the U-shaped inner end of the clamping groove 22 and the clamping edge in a horizontal position.
Preferably, in order to prevent the cylindrical end of the sample to be stretched from sliding on the inner wall of the through hole 21, an anti-slip structure is provided on the inner wall of the through hole 21, and the anti-slip structure is preferably a bump or an anti-slip line in this embodiment.
Further, the connecting rod 1 is made of high-hardness and high-strength materials under the action of long-term clamping force and axial tension, and meanwhile, in order to avoid the situation that the connecting rod 1 cannot be tightly gripped by the clamping block of the testing machine to cause the device to slip in the stretching process, the hardness range of the material of the connecting rod 1 is between 40HRC and 45HRC and is slightly lower than the hardness (about 45HRC) of the clamping block of the testing machine, and the connecting rod 1 made of the material can meet the requirement on testing strength and also meets the clamping requirement.
Optionally, in consideration of the fact that the bearing force of the device exceeds 50KN when the high-strength material is stretched, in order to avoid the excessive deformation failure of the device, the sample clamping piece 2 is made of a material with the bearing force greater than or equal to 50KN, and through actual comparison tests, the sample clamping piece 2 in the embodiment is preferably made of a hardened and tempered 42CrMo material, and the material is subjected to hardening and blackening treatment, so that the strength, hardness and corrosion resistance of the material can be guaranteed.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A Z-direction tensile sample holding device, comprising:
the connecting rod (1) is used for being in snap-in connection with a chuck of the testing machine;
sample fastener (2) for place the sample, sample fastener (2) are connected connecting rod (1) one end, sample fastener (2) side direction runs through and offers through-hole (21) that are used for holding the sample exposed core, keep away from through-hole (21) the tip of connecting rod (1) is seted up and is supplied draw-in groove (22) that the sample card was gone into.
2. The Z-direction stretching sample clamping device according to claim 1, wherein the joint of the connecting rod (1) and the sample clamping piece (2) adopts an arc transition connection.
3. The Z-direction tensile sample holding device according to claim 1, wherein the through hole (21) has a square shape.
4. The Z-direction tensile sample holding device according to claim 1, wherein the clamping groove (22) is a U-shaped opening.
5. The Z-direction stretching sample clamping device according to claim 4, wherein a clamping edge is convexly arranged on the inner wall of the through hole (21) at the opening of the clamping groove (22), and the clamping edge is configured to clamp and position a sample clamped in the clamping groove (22).
6. The Z-direction stretching sample holding device according to claim 1, wherein the inner wall of the through hole (21) is provided with an anti-slip structure.
7. The Z-direction tensile sample holding device of claim 6, wherein the anti-slip structure is a bump or an anti-slip texture.
8. The Z-direction tensile sample holding device according to claim 1, wherein the connecting rod (1) is made of a material having a hardness of 40HRC or more.
9. The Z-direction tensile sample holding device according to claim 1, wherein the sample holder (2) is made of a material having a load bearing capacity of 50KN or more.
10. The Z-direction tensile sample holding device according to claim 1, wherein the sample clamping piece (2) is made of a hardened and tempered 42CrMo material.
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CN202020128766.9U CN211553565U (en) | 2020-01-20 | 2020-01-20 | Z-direction stretching sample clamping device |
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CN202020128766.9U CN211553565U (en) | 2020-01-20 | 2020-01-20 | Z-direction stretching sample clamping device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113125250A (en) * | 2019-12-30 | 2021-07-16 | 中核北方核燃料元件有限公司 | Tensile detection device of fuel assembly sleeve pipe expanded joint |
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2020
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113125250A (en) * | 2019-12-30 | 2021-07-16 | 中核北方核燃料元件有限公司 | Tensile detection device of fuel assembly sleeve pipe expanded joint |
CN113125250B (en) * | 2019-12-30 | 2023-02-21 | 中核北方核燃料元件有限公司 | Tensile detection device of fuel assembly sleeve pipe expanded joint |
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