CN212008098U

CN212008098U - Clamp of universal material testing machine

Info

Publication number: CN212008098U
Application number: CN202020618369.XU
Authority: CN
Inventors: 黄喜
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-11-24
Anticipated expiration: 2030-04-22

Abstract

The utility model belongs to the technical field of mechanical properties test anchor clamps, especially, be an universal material testing machine's anchor clamps, including the last anchor clamps and the lower anchor clamps of longitudinal symmetry installation, go up anchor clamps and include U-shaped anchor clamps, upper bracket, go up spacing supporting shoe and first pin, go up U-shaped anchor clamps fixed connection in the bottom of upper bracket, upward be equipped with the first mounting groove that runs through its U-shaped groove perpendicularly on the U-shaped anchor clamps, the below that corresponds first mounting groove on the last U-shaped anchor clamps is equipped with first fixed orifices. The utility model discloses with the spacing assembly of cyclic annular sample between upper and lower limit support piece, adopt detachable construction to realize the rapid Assembly of upper and lower limit support piece, can realize automatic centering in tensile test process, guarantee that cyclic annular sample only receives axial tension, avoid receiving extra moment of flexure, greatly promoted experimental stability, guarantee the accuracy of experimental data, simple structure, practicality, and convenient to use crosses.

Description

Clamp of universal material testing machine

Technical Field

The utility model relates to a mechanical properties test fixture technical field specifically is an universal material testing machine's anchor clamps.

Background

The universal material testing machine adopts a microcomputer control full-digital broadband electro-hydraulic servo valve to drive a precise hydraulic cylinder, and a microcomputer control system automatically controls the test force, displacement and deformation in various modes to complete the tensile, compression, bending resistance and shearing tests of metal materials and components.

When the existing universal material testing machine is used for performing a tensile test on an annular sample, the adopted clamp structure comprises two clamps with U-shaped clamp arms and a pin for preventing the sample from falling off, the sample is placed in a U-shaped groove of the upper and lower U-shaped clamps during use, the upper and lower clamps run through the corresponding pin, the sample is positioned in a limiting cavity formed by the pin and the U-shaped groove, the testing machine is started, then, the tensile test can be performed on the sample, the structure can complete the tensile property test on the annular sample to a certain degree, the structural rationality is poor, the annular sample can not be guaranteed to be only subjected to axial tension, the phenomenon of misalignment is easy to occur, the stability of the tensile test is poor, the additional bending moment borne by the annular sample is large, and the test precision is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an universal material testing machine's anchor clamps has solved current universal material testing machine's anchor clamps structural rationality is relatively poor, can not guarantee that cyclic annular sample only receives axial tension, easily takes place not centering phenomenon, and tensile test stability is not good, and it is big to lead to cyclic annular sample to receive additional moment of flexure, influences the problem of experimental precision.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the clamp of the universal material testing machine comprises an upper clamp and a lower clamp which are symmetrically arranged up and down, wherein the upper clamp comprises an upper U-shaped clamp, an upper support seat, an upper limiting support block and a first pin, the upper U-shaped clamp is fixedly connected to the bottom of the upper support seat, a first mounting groove vertically penetrating through a U-shaped groove of the upper U-shaped clamp is formed in the upper U-shaped clamp, a first fixing hole is formed in the lower portion, corresponding to the first mounting groove, of the upper U-shaped clamp, a first arc groove in surface contact with an annular sample is formed in the middle of the upper limiting support block, a first fixing rod matched with the first mounting groove penetrates through the upper limiting support block in the transverse direction, a second fixing hole transversely corresponding to the first fixing hole is formed in the lower portion, corresponding to the first fixing rod, of the upper limiting support block, and the first pin is matched with the first fixing hole and the.

The lower clamp comprises a lower U-shaped clamp, a lower support, a lower limiting support block and a second pin, the lower U-shaped clamp is fixedly connected to the top of the lower support, a second mounting groove vertically penetrating through the U-shaped groove is formed in the lower support, a third fixing hole is formed in the lower support corresponding to the second mounting groove, a second arc groove in contact with the surface of the annular sample is formed in the middle of the lower limiting support block, a second fixing rod matched with the second mounting groove penetrates through the lower limiting support block in the transverse direction, a fourth fixing hole transversely corresponding to the third fixing hole is formed in the lower limiting support block corresponding to the second fixing rod, and the second pin is matched with the third fixing hole and the fourth fixing hole.

As a preferred technical scheme of the utility model, go up the U-shaped groove bottom intermediate position of U-shaped anchor clamps and lower U-shaped anchor clamps and all be equipped with interior circular arc recess, first circular arc recess corresponds from top to bottom with the interior circular arc recess of last U-shaped anchor clamps, interior circular arc recess and second circular arc recess on the lower U-shaped anchor clamps correspond from top to bottom.

As an optimized technical scheme of the utility model, the depth length of first mounting groove and second mounting groove is half of last U-shaped anchor clamps and lower U-shaped anchor clamps width length.

As an optimal technical scheme of the utility model, first mounting groove and second mounting groove adopt the longitudinal section to inlay dress flute profile for U-shaped groove or square groove.

As an optimal technical scheme of the utility model, all be equipped with the mounting hole on upper bracket and the undersetting, the upper bracket fastens respectively on the upper and lower end connecting portion of testing machine with the undersetting through the bolt with corresponding mounting hole looks adaptation.

(III) advantageous effects

Compared with the prior art, the utility model provides an universal material testing machine's anchor clamps possesses following beneficial effect:

this universal material testing machine's anchor clamps adopt detachable construction to realize the rapid Assembly of spacing supporting shoe from top to bottom with the spacing assembly of cyclic annular sample between the spacing supporting shoe from top to bottom, can realize automatic centering in tensile test process, guarantee that cyclic annular sample only receives axial tension, avoid receiving extra moment of flexure, greatly promoted experimental stability, guarantee the accuracy of experimental data, simple structure, practicality, and convenient to use.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of an upper U-shaped clamp of the present invention;

FIG. 3 is a schematic structural view of a middle and lower U-shaped clamp of the present invention;

fig. 4 is a schematic structural view of an upper limit supporting block in the present invention;

fig. 5 is a schematic structural view of the middle and lower limit support blocks of the present invention.

In the figure: 1. an upper U-shaped clamp; 101. a first mounting groove; 102. a first fixing hole; 2. an upper support; 3. an upper limiting supporting block; 301. a first arc groove; 302. a first fixing lever; 303. a second fixing hole; 4. a first pin; 5. a lower U-shaped clamp; 501. a second mounting groove; 502. a third fixing hole; 6. a lower support; 7. a lower limiting support block; 701. a second arc groove; 702. a second fixing bar; 703. a fourth fixing hole; 8. a second pin; 9. a ring-shaped sample.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-5, the present invention provides the following technical solutions: a clamp of a universal material testing machine comprises an upper clamp and a lower clamp which are symmetrically arranged up and down, wherein the upper clamp comprises an upper U-shaped clamp 1 and an upper support 2, go up spacing supporting shoe 3 and first pin 4, go up U-shaped anchor clamps 1 fixed connection in the bottom of upper bracket 2, upward be equipped with the first mounting groove 101 that runs through its U-shaped groove perpendicularly on U-shaped anchor clamps 1, it is equipped with first fixed orifices 102 to go up the below that corresponds first mounting groove 101 on U-shaped anchor clamps 1, the middle part of last spacing supporting shoe 3 is equipped with the first circular arc recess 301 with cyclic annular sample 9 surface contact, it has first dead lever 302 with first mounting groove 101 looks adaptation to go up to transversely run through on the spacing supporting shoe 3, it is equipped with the second fixed orifices 303 that transversely corresponds with first fixed orifices 102 to go up the below that corresponds first dead lever 302 on the spacing supporting shoe 3, first pin 4 and first fixed orifices 102 and second fixed orifices 303 looks adaptation.

The lower clamp comprises a lower U-shaped clamp 5, a lower support seat 6, a lower limiting support block 7 and a second pin 8, the lower U-shaped clamp 5 is fixedly connected to the top of the lower support seat 6, a second installation groove 501 vertically penetrating through a U-shaped groove of the lower support seat 6 is arranged on the lower support seat 6, a third fixing hole 502 is arranged above the lower support seat 6 corresponding to the second installation groove 501, a second arc groove 701 contacting with the surface of the annular sample 9 is arranged in the middle of the lower limiting support block 7, a second fixing rod 702 matched with the second installation groove 501 transversely penetrates through the lower limiting support block 7, a fourth fixing hole 703 transversely corresponding to the third fixing hole 502 is arranged below the lower limiting support block 7 corresponding to the second fixing rod 702, and the second pin 8 is matched with the third fixing hole 502 and the fourth fixing hole 703.

Specifically, inner circular arc grooves are formed in the middle positions of the bottoms of the U-shaped grooves of the upper U-shaped clamp 1 and the lower U-shaped clamp 5, the first circular arc groove 301 corresponds to the inner circular arc groove of the upper U-shaped clamp 1 up and down, and the inner circular arc groove of the lower U-shaped clamp 5 corresponds to the second circular arc groove 701 up and down.

In this embodiment, two limiting clamp cavities corresponding from top to bottom are formed by the first arc groove 301 and the second arc groove 701 and the corresponding inner arc groove, the annular sample 9 can be stably clamped through the two limiting clamp cavities, the tensile test can be performed on the annular sample 9, and the test data is more reliable.

Specifically, the depth of the first mounting groove 101 and the second mounting groove 501 is half of the width of the upper U-shaped clamp 1 and the lower U-shaped clamp 5.

In this embodiment, the upper limit supporting block 3 and the lower limit supporting block 7 can be respectively disposed in the middle of the upper U-shaped clamp 1 and the lower U-shaped clamp 5 by the above structural design, so that the upper clamp and the lower clamp are stressed more uniformly, and stress is prevented from concentrating on the side portions of the upper clamp and the lower clamp.

Specifically, the first mounting groove 101 and the second mounting groove 501 are formed in an embedded groove shape having a U-shaped or square-shaped longitudinal section.

In this embodiment, the first mounting groove 101 and the second mounting groove 501 are provided to achieve rapid assembly of the upper limit support block 3 and the lower limit support block 7, and an embedded groove shape with a U-shaped or square-shaped longitudinal section is adopted as an optimal choice, and an embedded groove shape with a hexagonal or other longitudinal section may also be used, which is not limited herein.

Specifically, all be equipped with the mounting hole on upper bracket 2 and the bottom suspension seat 6, upper bracket 2 and bottom suspension seat 6 fasten respectively on the upper and lower end connecting portion of testing machine through the bolt with corresponding mounting hole looks adaptation.

In this embodiment, the mode that adopts the bolt to fix last anchor clamps and lower anchor clamps does benefit to and carries out dismouting change to anchor clamps.

The utility model discloses a theory of operation and use flow: when the device is used, firstly, the upper support 2 and the lower support 6 are respectively fastened on the upper end and lower end connecting parts of the testing machine through bolts, the distance between the upper clamp and the lower clamp is adjusted according to the diameter length of the annular sample 9, the annular sample 9 is taken out, the upper limit support block 3 and the lower limit support block 7 are respectively arranged at the top end and the bottom end of the inner cavity of the annular sample 9, then the first fixing rod 302 and the second fixing rod 702 on the upper limit support block 3 and the lower limit support block 7 respectively correspond to the first installation groove 101 and the second installation groove 501 in a front-back mode, the first fixing rod 302 and the second fixing rod 702 are simultaneously embedded in the first installation groove 101 and the second installation groove 501, at the moment, the outer side surface of the top end of the annular sample 9 is in surface contact with the first arc groove 301, the inner side surface of the bottom end of the annular sample 9 is in surface contact with the second arc groove 701, and finally the upper limit support block 3 and the lower limit support On the shape anchor clamps 5, make annular sample 9 tend to receive axial pulling force only, guarantee the accuracy of test data.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an universal material testing machine's anchor clamps, includes the last anchor clamps and the lower anchor clamps of longitudinal symmetry installation, its characterized in that: the upper clamp comprises an upper U-shaped clamp (1), an upper support (2), an upper limiting support block (3) and a first pin (4), the upper U-shaped clamp (1) is fixedly connected to the bottom of the upper support (2), a first mounting groove (101) vertically penetrating through a U-shaped groove of the upper U-shaped clamp (1) is arranged on the upper U-shaped clamp (1), a first fixing hole (102) is arranged below the upper U-shaped clamp (1) corresponding to the first mounting groove (101), a first arc groove (301) in surface contact with the annular sample (9) is arranged in the middle of the upper limiting support block (3), a first fixing rod (302) matched with the first mounting groove (101) transversely penetrates through the upper limiting support block (3), a second fixing hole (303) transversely corresponding to the first fixing hole (102) is arranged below the upper limiting support block (3) corresponding to the first fixing rod (302), the first pin (4) is matched with the first fixing hole (102) and the second fixing hole (303);

the lower clamp comprises a lower U-shaped clamp (5), a lower support (6), a lower limit supporting block (7) and a second pin (8), the lower U-shaped clamp (5) is fixedly connected to the top of the lower support (6), a second mounting groove (501) vertically penetrating through the U-shaped groove is arranged on the lower support (6), a third fixing hole (502) is arranged on the lower support (6) corresponding to the upper part of the second mounting groove (501), the middle part of the lower limiting supporting block (7) is provided with a second arc groove (701) which is in surface contact with the annular sample (9), a second fixing rod (702) matched with the second mounting groove (501) transversely penetrates through the lower limiting supporting block (7), a fourth fixing hole (703) which is transversely corresponding to the third fixing hole (502) is arranged below the lower limit supporting block (7) corresponding to the second fixing rod (702), the second pin (8) is matched with the third fixing hole (502) and the fourth fixing hole (703).

2. The fixture of the universal material testing machine of claim 1, wherein: inner circular arc grooves are formed in the middle positions of the bottoms of the U-shaped grooves of the upper U-shaped clamp (1) and the lower U-shaped clamp (5), the first circular arc groove (301) corresponds to the inner circular arc groove of the upper U-shaped clamp (1) up and down, and the inner circular arc groove of the lower U-shaped clamp (5) corresponds to the second circular arc groove (701) up and down.

3. The fixture of the universal material testing machine of claim 1, wherein: the depth length of the first mounting groove (101) and the second mounting groove (501) is half of the width length of the upper U-shaped clamp (1) and the lower U-shaped clamp (5).

4. The fixture of the universal material testing machine of claim 1, wherein: the first mounting groove (101) and the second mounting groove (501) are in an embedded groove shape with a U-shaped or square-shaped longitudinal section.

5. The fixture of the universal material testing machine of claim 1, wherein: the upper support (2) and the lower support (6) are respectively provided with a mounting hole, and the upper support (2) and the lower support (6) are respectively fastened on the upper end connecting part and the lower end connecting part of the testing machine through bolts matched with the corresponding mounting holes.