KR20140041268A - Jig for griping sample and tension testing apparatus having the same - Google Patents

Jig for griping sample and tension testing apparatus having the same Download PDF

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Publication number
KR20140041268A
KR20140041268A KR1020120108387A KR20120108387A KR20140041268A KR 20140041268 A KR20140041268 A KR 20140041268A KR 1020120108387 A KR1020120108387 A KR 1020120108387A KR 20120108387 A KR20120108387 A KR 20120108387A KR 20140041268 A KR20140041268 A KR 20140041268A
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KR
South Korea
Prior art keywords
grip
jig
specimen
groove
jig body
Prior art date
Application number
KR1020120108387A
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Korean (ko)
Inventor
유창남
서용기
Original Assignee
현대제철 주식회사
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Publication date
Application filed by 현대제철 주식회사 filed Critical 현대제철 주식회사
Priority to KR1020120108387A priority Critical patent/KR20140041268A/en
Publication of KR20140041268A publication Critical patent/KR20140041268A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0298—Manufacturing or preparing specimens

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention includes a pair of jig bodies disposed at positions corresponding to each other to grip a specimen having a predetermined shape; A first grip part formed on an opposing plane of each jig body; And it provides a specimen grip jig including a second gripping portion is formed in the groove portion cut at a predetermined position of the flat portion of each jig body, the groove portion formed on the outer surface.

Description

JIG FOR GRIPING SAMPLE AND TENSION TESTING APPARATUS HAVING THE SAME}

The present invention relates to a specimen grip jig, and more particularly, to a specimen grip jig and a tensile test apparatus having the same to allow a specimen of various shapes to be gripped in one jig to perform a tensile test.

In general, physical and mechanical properties of materials in product design are measured, and in particular, the mechanical and mechanical properties of materials are measured through tensile tests using test specimens manufactured to predetermined specifications by measuring the strength and elongation.

Tensile testing of such materials is made by slowly pulling the specimens to fix the specimens of various shapes to determine all or part of the yield point and strength, tensile strength, yield extension, fracture elongation, and section shrinkage of the material.

Prior art related to the present invention is Republic of Korea Patent Publication No. 10-2006-0007548 (published: January 26, 2006), the prior art discloses a technology for a jig unit for fixing a tensile test specimen do.

SUMMARY OF THE INVENTION An object of the present invention is to provide a specimen grip jig and a tensile test apparatus having the same so that specimens of various shapes can be gripped in one jig to perform a tensile test.

In one aspect, the present invention includes a pair of jig bodies disposed at positions corresponding to each other to grip a specimen of a predetermined shape; A first grip part formed on an opposing plane of each jig body; And it provides a specimen grip jig including a second gripping portion is formed in the groove portion cut at a predetermined position of the flat portion of each jig body, the groove portion formed on the outer surface.

The first grip portion and the second grip portion are preferably formed of irregularities having the same size as each other.

In the groove portion, a cutting member corresponding to the shape of the groove portion, the cutting member is formed to be detachable to form a cutting groove of a predetermined shape exposed to the outside of the jig body,

It is preferable that an uneven portion is formed in the inner surface portion of the cut groove.

Preferably, the groove is provided such that a closing member corresponding to the shape of the groove is detachable, and an uneven portion along the same line as the first grip part is formed on an outer surface of the closing member.

When the specimen is formed in a plate shape, the plate-like specimen is gripped in close contact with the first grip portion of each jig body, and when the specimen is formed in a rod shape, the rod-shaped specimen is a groove portion of each jig body It is preferably located in close contact with the second grip portion to grip.

In another aspect, the present invention provides a tensile test apparatus comprising the specimen grip jig.

The present invention has the effect of allowing the tensile test to be carried out by gripping specimens of various shapes in one jig.

1 is a perspective view showing a tensile test apparatus having a specimen grip jig of the present invention.
2 is a perspective view showing a specimen grip jig according to the present invention.
3 is a view showing a state in which the plate-like specimen is gripped.
4 is a view showing a state in which a rod-shaped specimen is gripped.
5 is a view showing an example that is further provided with a cutting member according to the present invention.
6 is a view showing an example further provided with a closing member according to the present invention.

Hereinafter, a tensile test apparatus having a specimen grip jig of the present invention will be described with reference to the accompanying drawings.

Here, the configuration of the specimen grip jig will be described with the configuration of the tensile test apparatus.

1 is a perspective view showing a tensile test apparatus having a specimen grip jig of the present invention.

Referring to Figure 1, the tensile test apparatus of the present invention is largely composed of a specimen grip jig 100, a moving part and a lifting part.

The configuration of the specimen grip jig 100 will be described.

2 shows a specimen grip jig of the present invention.

1 and 2, the specimen grip jig 100 includes a pair of jig bodies 110, a first grip part A, and a second grip part B.

The pair of jig bodies 110 are formed in the same shape with each other.

Of the pair of jig bodies 110, any one configuration will be described first.

The jig body 110 has a predetermined thickness, and is formed of a metal having a predetermined area and a predetermined strength.

A flat portion 111 is formed on one surface of the jig body 110.

In addition, a groove portion 112 which is cut inward of the jig body 110 is formed at a central position of one surface of the jig body 110, that is, at a central position of the flat portion 111.

The groove portion 112 may be formed to be cut to form a right angle inward from the center position of the flat portion 111.

In addition, a first grip portion A having an uneven shape is formed in the flat portion 111. The unevenness of the first grip part A may be formed along one line or may be formed along a line that crosses orthogonal to each other.

In addition, a second grip part B is formed on an inner side surface of the groove part 112.

The second grip part B may be formed in a concave-convex shape, and may be formed in the same shape as the first grip part A.

In addition, the unevenness in the first grip part A and the second grip part b is formed in the same shape.

In the present invention, the jig body 110 formed as described above is provided as a pair, and the first and second grip parts A and B are disposed to face each other.

In addition, the jig body 110 may be driven to abut or spaced apart from each other by the moving part 200.

The moving part includes a moving shaft 211 and a moving cylinder 210 that expands and contracts the moving shaft 211. The moving part is connected to each of the jig body 110.

The moving shaft 211 of each moving part is connected to each jig body 110.

Therefore, when the moving cylinder 210 expands and contracts the moving shaft 211 by external power, the pair of jig bodies 110 may contact or be spaced apart from each other.

In addition, each moving unit may be lifted by each lifting unit.

The elevating unit includes an elevating shaft 221 fixed to each moving unit, and an elevating cylinder 220 for elevating the elevating shaft 221.

The lifting cylinder 220 may lift the lifting shaft 221 by external power.

Next, the operation of the tensile test apparatus having a specimen grip jig having the above configuration will be described.

Specimen 10 has a predetermined shape.

When the specimen 11 is a specimen formed in a plate shape, it is disposed between the jig body 110 of one phase, as shown in FIG.

The moving unit moves the moving shaft 211 to move the pair of jig bodies 110 in close contact with each other.

Accordingly, the plate-shaped specimen 11 may be gripped by the first grip part A formed in the planar part 111 of the pair of jig bodies 110.

In addition, since the first grip portion A is formed in an uneven shape, the plate-shaped specimen 11 can be gripped firmly so as not to slip downward.

On the other hand, as shown in Figure 4, in the case of a rod or rod-shaped specimen 10, the specimen 10 is disposed to be located in the groove portion 112 of the pair of jig body 110.

The moving unit moves the moving shaft 211 to move the pair of jig bodies 110 in close contact with each other.

Therefore, the rod- or rod-shaped specimen 10 may be gripped by the second grip part B which is located in the groove part 112 of the pair of jig bodies 110 and is formed on the inner side of the groove part 112. have.

In addition, since the second grip portion B is formed in an uneven shape, the rod or rod-shaped specimen 10 can be gripped firmly so as not to slip downward.

Although not shown in the drawings, the upper end of the specimen 10 is fixed by a separate fixing device.

By lowering the moving part through the lifting part in such a state, the tensile test for the plate- or rod-shaped specimen 10 can be performed in one apparatus.

Embodiments according to the present invention may allow different specimens, which are formed in a plate or rod or rod shape, to grip in one jig.

5 is a view showing an example that is further provided with a cutting member according to the present invention.

On the other hand, referring to Figure 5, the groove portion 112 formed in each jig body 110 according to the present invention may be installed to be detachable 'V' shaped cutting member 120.

An incision groove 121 is formed in the incision member 120, and the incision member 120 may be positioned in the groove portion 112 and coupled to the jig body 110 by a bolt B.

Accordingly, in the present invention, when the size of the rod or rod-shaped specimens 10 is formed to be smaller than a predetermined diameter, the cutting member 120 may be mounted to the groove 112 as described above.

That is, when the pair of jig body 110 is in close contact, each cutting member 120 forms one cutting groove 121.

In addition, the rod-shaped specimen 10 having a predetermined diameter may be fixed by being in close contact with the inside of the cutting groove 121.

In addition, an uneven surface is formed on the inner surface of the cutting groove 121 to easily grip the rod-shaped or rod-shaped specimen 10.

Embodiments according to the present invention can fix rod or rod-shaped specimens having different sizes in one jig.

6 is a view showing an example further provided with a closing member according to the present invention.

Referring to FIG. 6, a groove member 112 formed in each jig body 110 may be detachably provided with a closing member 130 capable of filling the groove 112.

The outer surface of the finishing member 130 is formed with irregularities formed in the same line as the first grip portion (A).

In the above case, when only the specimen 11 on the plate is gripped, a case in which the specimen cannot be gripped by substantially the area of the groove 112 is generated.

Therefore, in the embodiment according to the present invention, when the grip on the plate, by fastening the closing member 130 to the groove 112 formed in each jig body 110 through the bolt (B), each jig The entire area of the first grip portion A in the planar portion 111 of the body 110 is formed.

That is, by gripping the specimen by using the entire area of the first grip portion A of each jig body 110, it is possible to further improve the fixing force during the grip.

 As mentioned above, although the specific Example regarding the tensile test apparatus which has the specimen grip jig of this invention was described, it is clear that various implementation deformation is possible without the deviating from the range of this invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

111: flat part
112: Groove
100: jig
110: jig body
120: incision member
130: Closing member
A: 1st grip part
B: 2nd grip part

Claims (6)

A pair of jig bodies disposed at positions corresponding to each other to grip a specimen having a predetermined shape;
A first grip part formed on an opposing plane of each jig body; And
The test piece grip jig, characterized in that the groove is formed in the planar portion of each of the jig body is formed, the second grip portion is formed on the outer surface of the groove portion.
The method according to claim 1,
The first grip portion and the second grip portion,
Specimen grip jig, characterized in that formed by irregularities having the same size with each other.
The method according to claim 1,
In the groove portion,
Corresponding to the shape of the groove portion, the cutting member is formed to be detachable to form a cutting groove of a predetermined shape exposed to the outside of the jig body,
Specimen grip jig, characterized in that the concave-convex portion is formed on the inner surface portion of the cutting groove.
The method according to claim 1,
In the groove portion,
A closing member corresponding to the shape of the groove is detachably installed,
Specimen grip jig, characterized in that the concave-convex portion along the same line as the first grip portion is formed on the outer surface portion of the closure member.
The method according to claim 1,
When the specimen is formed in a plate shape, the plate-shaped specimen is gripped in close contact with the first grip portion of each jig body,
When the specimen is formed in a rod shape, the rod-shaped specimen is located in the groove portion of each jig body, the specimen grip jig, characterized in that the grip is in close contact with the second grip portion.
A tensile test apparatus comprising the specimen grip jig of claim 1.


KR1020120108387A 2012-09-27 2012-09-27 Jig for griping sample and tension testing apparatus having the same KR20140041268A (en)

Priority Applications (1)

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KR1020120108387A KR20140041268A (en) 2012-09-27 2012-09-27 Jig for griping sample and tension testing apparatus having the same

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Application Number Priority Date Filing Date Title
KR1020120108387A KR20140041268A (en) 2012-09-27 2012-09-27 Jig for griping sample and tension testing apparatus having the same

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KR20140041268A true KR20140041268A (en) 2014-04-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101533544B1 (en) * 2014-12-30 2015-07-03 성균관대학교산학협력단 Assistance apparatus for engagement and disengagement of jig for tensile test
KR20180024202A (en) * 2016-08-29 2018-03-08 주식회사 포스코 Test-piece auxiliary apparatus for fatigue test
CN110186753A (en) * 2019-06-28 2019-08-30 西安建筑科技大学 A kind of bar samples stretching clamping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101533544B1 (en) * 2014-12-30 2015-07-03 성균관대학교산학협력단 Assistance apparatus for engagement and disengagement of jig for tensile test
KR20180024202A (en) * 2016-08-29 2018-03-08 주식회사 포스코 Test-piece auxiliary apparatus for fatigue test
CN110186753A (en) * 2019-06-28 2019-08-30 西安建筑科技大学 A kind of bar samples stretching clamping device

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