CN203772637U - Minimum bolt tensile load test fixture - Google Patents
Minimum bolt tensile load test fixture Download PDFInfo
- Publication number
- CN203772637U CN203772637U CN201420081401.XU CN201420081401U CN203772637U CN 203772637 U CN203772637 U CN 203772637U CN 201420081401 U CN201420081401 U CN 201420081401U CN 203772637 U CN203772637 U CN 203772637U
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- bolt
- package assembly
- load test
- test fixture
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- Expired - Fee Related
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Abstract
The utility model relates to a minimum bolt tensile load test fixture which comprises a first pull rod, an external member and a second pull rod. The first pull rod comprises a first clamping end clamped by a first chuck of a testing machine, and a first connecting end connected with the external member; the external member comprises a first end connected with the first connecting end, and a second end which is detachably connected with one end of a bolt head of a to-be-tested bolt; the second pull rod comprises a second clamping end for clamping a second chuck opposite to the first chuck on the testing machine, and a second connecting end which is detachably connected with one end of a bolt rod of the to-be-tested bolt. The first pull rod is connected with the upper end of the external member, the first pull rod and the second pull rod can be respectively clamped by the two opposite chucks of the testing machine during test, namely the to-be-tested bolt can be subjected to a minimum tensile load test, and the chucks are conveniently clamped.
Description
Technical field
The utility model relates to tension grip, more particularly, relates to a kind of bolt lowest pull load test fixture.
Background technology
High-strength bolt is high-intensity bolt, generally uses plow-steel manufacture, or refers to impose the bolt of larger pretightning force, belongs to a kind of standard component.Construction is simple, stress performance is good owing to having for high-strength bolt, replaceable, endurance and under dynamic loading effect the unlikely advantage such as loosening, and be widely used in the connection of bridge, rail, high pressure and extra-high tension unit.
The mechanical property of high-strength bolt comprises tensile strength, yield strength (Proof strength of non-proportional), elongation after fracture, reduction of area, impact absorbing energy, hardness and lowest pull load etc.Wherein, the mechanical performance index such as the tensile strength of high-strength bolt, yield strength (Proof strength of non-proportional), elongation after fracture, reduction of area, impact absorbing energy should, according to the regulation of standard GB/T228.1-2010 " metal material stretching test part 1: room temperature test method ", need to sample and test on the material of manufacturing high-strength bolt.For high-strength bolt finished product, due to threaded existence, the cross-sectional area of finished product is more difficult definite, and cross-sectional area is the important parameter of determining tensile strength, yield strength (Proof strength of non-proportional), therefore, generally do not recommend high-strength bolt finished product to carry out the tension test of metal material, and adopt lowest pull load test.In the standards such as GB/T1231-2006 " high-strength large hexagon head bolt used for steel structure, heavy series hexagon nut, gasket techniques condition ", GB/T3098.1-2010 " securing member mechanical property bolt, screw and double-screw bolt ", all specify the high-strength bolt lowest pull load test value of different performance grade.
High-strength bolt lowest pull load test is generally carried out on universal testing machine.Because universal testing machine is the design that needs according to metal material stretching test, general fixture only considers that sample is the shape of sheet material, bar or tubing, for high-strength bolt lowest pull load test, cannot solve the clamping problem of high-strength bolt finished product sample.In GB/T3098.1-2010 " securing member mechanical property bolt, screw and double-screw bolt ", recommend the concrete method of clamping of finished product sample in high-strength bolt lowest pull load test, as shown in Figure 3, but the tool inconvenience in this recommendation figure is by test machine clamping, in actual test process, operability is not strong.
Utility model content
The technical problems to be solved in the utility model is, a kind of improved bolt lowest pull load test fixture is provided.
The utility model solves the technical scheme that its technical matters adopts: construct a kind of bolt lowest pull load test fixture, comprise the first pull bar, package assembly and the second pull bar;
Described the first pull bar comprises for the first bare terminal end of the first chuck clamping of testing machine and the first link being connected with described package assembly;
Described package assembly comprises the first end being connected with described the first link and the second end removably connecting with bolt head one end of described bolt to be tested;
Described the second pull bar comprises for the second bare terminal end of the second chuck clamping relative with described the first chuck on testing machine and the second link removably connecting with body of bolt one end of described bolt to be tested.
Preferably, described the first link is provided with external thread, and the first end of described package assembly is provided with the connecting hole corresponding with described the first link.
Preferably, described package assembly is column cavity body structure, its side is provided with opening, so that bolt head one end of described bolt to be tested is packed in described package assembly, the second end of described package assembly is provided with the U-shaped bayonet socket with described open communication, so that described body of bolt one end wears described bayonet socket, the minimum profile size of described bayonet socket is not more than the physical dimension of described bolt head one end.
Preferably, described bolt lowest pull load test fixture also comprises for being arranged on the internal member in described package assembly, described internal member is provided with sleeve joint hole corresponding to body of bolt one end for described bolt to be tested, so that described body of bolt one end wears described sleeve joint hole and described bayonet socket successively, the profile of described internal member is greater than the minimum profile size of described bayonet socket.
Preferably, described internal member is Step Shaft shape, comprise the large shaft part coordinating with the little shaft part of described bayonet fittings and with described package assembly inner side, described sleeve joint hole is along the axial setting of described internal member, the axis of described sleeve joint hole and the dead in line of described internal member.
Preferably, described package assembly is cylindric, and described connecting hole is the threaded hole of the dead in line of axis and described package assembly.
Preferably, the interior end side surface of described bayonet socket is arc surface, and the axis of described arc surface and the dead in line of described connecting hole, and the side profile of described arc surface and described little shaft part matches, and ensures the dead in line of axis and the described package assembly of described sleeve joint hole.
Preferably, the side of described the first bare terminal end is provided with anti-slip veins, and the side of described the second bare terminal end is provided with anti-slip veins.
Preferably, described bolt lowest pull load test fixture also comprises lock sleeve, described lock sleeve is provided with the external thread on described the first link and coordinates the first threaded hole, described lock sleeve is screwed on described the first link by described the first threaded hole, and offsets with the upper end of described package assembly.
Preferably, described the second link be provided with body of bolt one end of described bolt to be tested on the second threaded hole of threaded engagement.
Implement bolt lowest pull load test fixture of the present utility model, there is following beneficial effect: removably connect with bolt head one end, body of bolt one end of bolt to be tested respectively by this package assembly, the second pull bar, the first pull bar is connected with the upper end of package assembly, the chuck that testing machine two is relative in the time of test can clamp the first pull bar and the second pull bar respectively, can carry out lowest pull load test to bolt to be tested, facilitate the clamping of chuck, test is more easily carried out.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is that the bolt lowest pull load test fixture in the utility model embodiment is installed and used view;
Fig. 2 is that the second pull bar in Fig. 1 is installed and used view when studs is carried out to lowest pull load test;
Fig. 3 is the installment state schematic diagram of bolt lowest pull load test fixture in background technology.
Embodiment
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1, the bolt lowest pull load test fixture in preferred embodiment of the utility model comprises the first pull bar 1, lock sleeve 2, package assembly 3, internal member 4 and the second pull bar 5.
In certain embodiments, the first pull bar 1 comprises the first bare terminal end 11 clamping for the first chuck 6 of testing machine and the first link 12 being connected with package assembly 3.The side of the first bare terminal end 11 is provided with anti-slip veins, the clamping friction force while clamping to increase by the first chuck 6.The first link 12 is provided with external thread, to be connected with package assembly 3.
Preferably, lock sleeve 2 is shim-like structure, and its middle part is provided with the first threaded hole 21 coordinating with the external thread on the first link 12, and lock sleeve 2 is screwed on the first link 12 by the first threaded hole 21, and offsets with the upper end of package assembly 3.Understandably, in other embodiments, also lock sleeve 2 can be cancelled, allow the first pull bar 1 directly and package assembly 3 is connected and fixed.
In certain embodiments, package assembly 3 is column cavity body structure, preferably, for cylindric, understandably, in other embodiments, also can be other polygon column structures.Package assembly 3 comprises the first end 31 being connected with the first link 12 and the second end 32 removably connecting with bolt head one end 71 of bolt 7 to be tested.First end 31 is provided with the connecting hole 311 corresponding with the first pull bar 1, the dead in line of the axis of connecting hole 311 and package assembly 3.Connecting hole 311 is the threaded hole corresponding with the external thread of the first link 12, and understandably, in other embodiments, connecting hole 311 also can be through hole, is connected package assembly 3 is located fixing with the first link 12 by locking parts such as nuts.
In certain embodiments, the side of package assembly 3 is provided with opening 33, so that bolt head one end 71 of bolt 7 to be tested is packed in package assembly 3.The second end 32 of package assembly 3 is provided with the U-shaped bayonet socket 321 being communicated with opening 33, so that body of bolt one end 72 wears bayonet socket 321.Further, the interior end side surface of bayonet socket 321 is arc surface, the dead in line of the axis of this arc surface and connecting hole 311.
Further, in certain embodiments, internal member 4 is Step Shaft shape, preferably, is cylindrical step axle, comprises the little shaft part 41 coordinating with bayonet socket 321 and the large shaft part 42 coordinating with the inner side of package assembly 3.Internal member 4 is provided with the sleeve joint hole 43 for body of bolt one end 72 correspondences of bolt 7 to be tested, the dead in line of the axis of sleeve joint hole 43 and internal member 4, the diameter of sleeve joint hole 43 is corresponding with the diameter of body of bolt one end 72, to ensure that body of bolt one end 72 is inserted into sleeve joint hole 43 and can not produces and rock after interior.The side profile of the arc surface of bayonet socket 321 and little shaft part 41 matches, after internal member 4 is installed on bayonet socket 321, and the side laminating of the arc surface of bayonet socket 321 and little shaft part 41, the dead in line of the axis of sleeve joint hole 43 and package assembly 3.
In the time of test, body of bolt one end 72 of bolt 7 to be tested is arranged in sleeve joint hole 43, and internal member 4 is installed on bayonet socket 321 by opening 33, makes body of bolt one end 72 wear successively sleeve joint hole 43 and bayonet socket 321.Bolt 7 to be tested is axially arranged on the second end 32 along package assembly 3, meanwhile, and bayonet socket 321 and the dead in line of axis and the first pull bar 1 that can ensure bolt 7 to be tested coordinating of little shaft part 41.
In certain embodiments, also internal member 4 can be cancelled, ensure that the minimum profile size of bayonet socket 321 is not more than the physical dimension of bolt head one end 71, is stuck in bolt head one end 71 in package assembly 3.
Further, the second pull bar 5 comprises the second bare terminal end 51 clamping for the second chuck 8 relative with the first chuck 6 on testing machine and the second link 52 removably connecting with body of bolt one end 72 of bolt 7 to be tested.Preferably, the side of the second bare terminal end 51 is provided with anti-slip veins, to increase the clamping friction force of the second chuck 8 in the time clamping.The second link 52 be provided with body of bolt one end 72 of bolt 7 to be tested on the second threaded hole 521 of threaded engagement.The second threaded hole 521 coordinates with body of bolt one end 72, and the second bare terminal end 51 is gripped by the second chuck 8.
Adjust the position of bolt 7 to be tested, ensure that the axis of bolt 7 to be tested and the second pull bar 5, the first pull bar 1 is on same axis.Screw the position that lock sleeve 2 fixes package assembly 3, the first chuck 6, the second chuck 8 can be clamped the first pull bar 1, the second pull bar 5 simultaneously and carry out tensile test respectively, make the axially loaded of bolt 7 to be tested more even.
As shown in Figure 2, in certain embodiments, if will be to studs 7 ' carry out lowest pull load test time, with two the second pull bars 5 respectively with the threaded engagement at studs 7 ' two ends, the first chuck 6 of testing machine, the second chuck 8 clamp respectively second pull bar 5 can be to studs 7 ' test.
Understandably, above-mentioned each technical characterictic can combination in any uses and unrestricted.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a bolt lowest pull load test fixture, is characterized in that, comprises the first pull bar (1), package assembly (3) and the second pull bar (5);
Described the first pull bar (1) comprises for first bare terminal end (11) of the first chuck (6) clamping of testing machine and the first link (12) being connected with described package assembly (3);
Described package assembly (3) comprises the first end (31) being connected with described the first link (12) and the second end (32) removably connecting with bolt head one end (71) of described bolt to be tested (7);
Described the second pull bar (5) comprises for second bare terminal end (51) of the second chuck (8) clamping relative with described the first chuck (6) on testing machine and the second link (52) removably connecting with body of bolt one end (72) of described bolt to be tested (7).
2. bolt lowest pull load test fixture according to claim 1, it is characterized in that, described the first link (12) is provided with external thread, and the first end (31) of described package assembly (3) is provided with the connecting hole (311) corresponding with described the first link (12).
3. bolt lowest pull load test fixture according to claim 2, it is characterized in that, described package assembly (3) is column cavity body structure, its side is provided with opening (33), so that bolt head one end (71) of described bolt to be tested (7) is packed in described package assembly (3), second end (32) of described package assembly (3) is provided with the U-shaped bayonet socket (321) being communicated with described opening (33), so that described body of bolt one end (72) wears described bayonet socket (321), the minimum profile size of described bayonet socket (321) is not more than the physical dimension of described bolt head one end (71).
4. bolt lowest pull load test fixture according to claim 3, it is characterized in that, described bolt lowest pull load test fixture also comprises for being arranged on the internal member (4) in described package assembly (3), described internal member (4) is provided with the sleeve joint hole (43) corresponding for body of bolt one end (72) of described bolt to be tested (7), so that described body of bolt one end (72) wears described sleeve joint hole (43) and described bayonet socket (321) successively, the profile of described internal member (4) is greater than the minimum profile size of described bayonet socket (321).
5. bolt lowest pull load test fixture according to claim 4, it is characterized in that, described internal member (4) is Step Shaft shape, comprise the little shaft part (41) coordinating with described bayonet socket (321) and the large shaft part (42) coordinating with described package assembly (3) inner side, described sleeve joint hole (43) is along the axial setting of described internal member (4), the dead in line of the axis of described sleeve joint hole (43) and described internal member (4).
6. bolt lowest pull load test fixture according to claim 4, is characterized in that, described package assembly (3) is cylindric, and described connecting hole (311) is the threaded hole of the dead in line of axis and described package assembly (3).
7. bolt lowest pull load test fixture according to claim 5, it is characterized in that, the interior end side surface of described bayonet socket (321) is arc surface, and the dead in line of the axis of described arc surface and described connecting hole (311), the side profile of described arc surface and described little shaft part (41) matches, and ensures the dead in line of axis and the described package assembly (3) of described sleeve joint hole (43).
8. bolt lowest pull load test fixture according to claim 1, is characterized in that, the side of described the first bare terminal end (11) is provided with anti-slip veins, and the side of described the second bare terminal end (51) is provided with anti-slip veins.
9. bolt lowest pull load test fixture according to claim 1, it is characterized in that, described bolt lowest pull load test fixture also comprises lock sleeve (2), described lock sleeve (2) is provided with the external thread on described the first link (12) and coordinates the first threaded hole (21), it is upper that described lock sleeve (2) is screwed to described the first link (12) by described the first threaded hole (21), and offset with the upper end of described package assembly (3).
10. bolt lowest pull load test fixture according to claim 1, is characterized in that, described the second link (52) be provided with body of bolt one end (72) of described bolt to be tested (7) on second threaded hole (521) of threaded engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420081401.XU CN203772637U (en) | 2014-02-25 | 2014-02-25 | Minimum bolt tensile load test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420081401.XU CN203772637U (en) | 2014-02-25 | 2014-02-25 | Minimum bolt tensile load test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203772637U true CN203772637U (en) | 2014-08-13 |
Family
ID=51289815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420081401.XU Expired - Fee Related CN203772637U (en) | 2014-02-25 | 2014-02-25 | Minimum bolt tensile load test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203772637U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527160A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Strength experiment clamp with double-head stud convenient to replace |
| CN105527161A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Strength test fixture applicable to studs |
| CN105527158A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Bolt tension test fixture |
| CN105527159A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Bolt strength test fixture convenient to popularize in packaged manner |
| CN105628495A (en) * | 2016-03-01 | 2016-06-01 | 成都亨通兆业精密机械有限公司 | Auxiliary device used for bolt strength test |
| CN106153455A (en) * | 2016-09-23 | 2016-11-23 | 江西洪都航空工业集团有限责任公司 | A kind of nut tensile test equipment |
| CN107505194A (en) * | 2017-08-10 | 2017-12-22 | 安徽六方重联机械股份有限公司 | A kind of bolt tension test fixture |
| CN110320126A (en) * | 2019-08-16 | 2019-10-11 | 贵州大学 | A kind of vertical loading device for reciprocating corrosion fretting apparatus |
| CN110494726A (en) * | 2018-02-28 | 2019-11-22 | 株式会社东日制作所 | Pulling device |
-
2014
- 2014-02-25 CN CN201420081401.XU patent/CN203772637U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527160A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Strength experiment clamp with double-head stud convenient to replace |
| CN105527161A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Strength test fixture applicable to studs |
| CN105527158A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Bolt tension test fixture |
| CN105527159A (en) * | 2016-03-01 | 2016-04-27 | 成都亨通兆业精密机械有限公司 | Bolt strength test fixture convenient to popularize in packaged manner |
| CN105628495A (en) * | 2016-03-01 | 2016-06-01 | 成都亨通兆业精密机械有限公司 | Auxiliary device used for bolt strength test |
| CN106153455A (en) * | 2016-09-23 | 2016-11-23 | 江西洪都航空工业集团有限责任公司 | A kind of nut tensile test equipment |
| CN107505194A (en) * | 2017-08-10 | 2017-12-22 | 安徽六方重联机械股份有限公司 | A kind of bolt tension test fixture |
| CN110494726A (en) * | 2018-02-28 | 2019-11-22 | 株式会社东日制作所 | Pulling device |
| US10794416B2 (en) | 2018-02-28 | 2020-10-06 | Tohnichi Mfg. Co., Ltd. | Tensioning device |
| CN110320126A (en) * | 2019-08-16 | 2019-10-11 | 贵州大学 | A kind of vertical loading device for reciprocating corrosion fretting apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170225 |