CN104614173A - Tool for testing non-suspended nut type threaded pair tension force - Google Patents
Tool for testing non-suspended nut type threaded pair tension force Download PDFInfo
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- CN104614173A CN104614173A CN201510064847.0A CN201510064847A CN104614173A CN 104614173 A CN104614173 A CN 104614173A CN 201510064847 A CN201510064847 A CN 201510064847A CN 104614173 A CN104614173 A CN 104614173A
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Abstract
The invention discloses a tool for testing non-suspended nut type threaded pair tension force, and aims at testing mechanical performances of threaded pairs formed by an inner threaded test part and a bolt. The tool comprises a pulling part pulled through a tension tester, and a through hole through which the bolt passes; an operating chamber is formed in the through side of the through hole; the bolt can pass through the operation chamber through the through hole and then is mounted to the inner threaded test part in the operation chamber. According to the tool, the operation chamber is formed in the through side of the through hole, the bolt extending into the through hole can be assembled to the nut and other inner threaded test part in the operation chamber, and therefore, the beneficial conditions are provided for the mounting of the through end of the bolt and the inner threaded test part; the stressing condition of the non-suspended nut type threaded pair, namely, the stressing state that one end of the nut or other inner threaded test part is propped by the tool can be really simulated, and therefore, accurate test data can be obtained under such vivid simulation condition.
Description
Technical field
The present invention relates to tensile test technical field, particularly one non-Tension Nut formula screw thread pair tensile test frock.
Background technology
Be threaded and comprise Tension Nut formula and non-Tension Nut formula, wherein, after Tension Nut formula is threaded and refers to that nut is connected with bolt, the end face in the territory, screw thread Europe of nut is not subject to connected piece extruding, adopt this thread connecting mode, screw thread uniform force, can improve the load-bearing capacity of screw thread pair.Non-Tension Nut formula screw thread pair is more common form, an end face of nut by be connected workpiece against, the screw thread discontinuity of this screw thread pair form, near being connected, the first lap ridge of workpiece side is stressed accounts for 30% of whole screw thread pair bearing capacity for it, and ridge is below stressed reduces successively.
No matter be Tension Nut formula screw thread pair be also non-Tension Nut formula screw thread pair, detect its mechanical property, all will carry out tensile test.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is a kind of front view of common tensile test frock, and Fig. 2 is the sectional view of the tensile test frock in Fig. 1.
Existing tensile test frock 10 is generally the threaded hole 12 longitudinally arranging certain depth in one end of a cylindrical work, and this threaded hole 12 has internal thread, during test, is screwed in by bolt in internal thread, and the one end be exposed at by bolt outside frock 10 is fixed.The other end of cylindrical work processes external slips tooth 11, is assembled by the internal slip tooth of this end and tension tester, after fixing, uses tension tester to stretch this frock 10.
So, the frock 10 that cylindrical work is formed is equivalent to nut to be measured or internal screw workpiece to be measured, this test, and object is the mechanical property of testing screw thread pair, such as, when by pulling force, and the crack conditions of body of bolt, the internal thread destruction situation etc. of nut.
This test tool 10 can simulate the mechanical characteristic of Tension Nut formula screw thread pair more really, and obtain analysis result accurately, but, for non-Tension Nut formula screw thread pair but and inapplicable, because the screw thread pair form that this frock 10 simulates also does not meet the Force principle of non-Tension Nut formula screw thread pair, therefore, the test figure distortion obtained is serious, can not use.
How to provide a kind of non-Tension Nut formula screw thread pair tensile test frock, making it be applicable to the tensile test of non-Tension Nut formula screw thread pair, is those skilled in the art's technical issues that need to address.
Summary of the invention
Object of the present invention is for providing a kind of non-Tension Nut formula screw thread pair tensile test frock.This non-Tension Nut formula screw thread pair tensile test frock can the stress of accurate simulation non-Tension Nut formula screw thread pair, is applicable to the tensile test of non-Tension Nut formula screw thread pair.
For solving the problems of the technologies described above, the invention provides a kind of mechanical property for testing the screw thread pair that internal thread testpieces and bolt are formed, comprise by the pulling portion of tension tester tractive, also comprise the through hole for described bolt-through, described test tool is formed with operation chamber in the side that passes of described through hole, described bolt can be penetrated to described operation chamber by described through hole, and installs with described internal thread testpieces in described operating cavity indoor.
Because the side that passes at through hole has this operation chamber, can assemble at internal thread testpieces such as operating cavity indoor and nuts after bolt stretches into through hole, install for the traversing through end of bolt and internal thread testpieces and advantage is provided, like this, the stress of non-Tension Nut formula screw thread pair can be simulated truly, namely nut or other internal thread testpieces one end by workpiece against stress, test figure accurately can be obtained under this analog case true to nature.
Preferably, described test tool also comprises the operating block be connected with described pulling portion, and described through hole is located at described operating block, and described pulling portion is the cylindrical body coaxially arranged with described through hole; Described operating block offers in the side that passes of described through hole the passage run through in the direction along vertical described through hole, and described passage forms described operation chamber.
Preferably, it is characterized in that, described operating block is substantially in cylindricality, and its radial dimension is greater than described pulling portion, is also provided with connecting portion therebetween, and by described connecting portion arc transition.
Preferably, described connecting portion has the different each portion section of radial dimension, and the smallest radial size of each described portion section is less than described pulling portion.
Preferably, described passage is square column type.
Preferably, described test tool offers from the direction along vertical described through hole outside it path be communicated with it, so that described bolt is advanced into described through hole by described path, and the traversing through end of described bolt and described internal thread testpieces are contained in described operation chamber.
Preferably, described pulling portion is provided with external slips tooth, and described external slips tooth can be fixed with the internal slip tooth of described tension tester.
Accompanying drawing explanation
Fig. 1 is a kind of front view of common tensile test frock;
Fig. 2 is the sectional view of the tensile test frock in Fig. 1;
Fig. 3 is the front view of a kind of embodiment of tensile test frock provided by the invention;
Fig. 4 is the A-A cut-open view of the tensile test frock in Fig. 3;
Fig. 5 is the vertical view of the tensile test frock in Fig. 3;
Fig. 6 is the A position partial enlarged drawing in Fig. 3;
Fig. 7 is the assembling exemplary plot that tensile test frock in Fig. 2 and nut screw connection are tested;
Fig. 8 is the assembling exemplary plot of tensile test frock in Fig. 2 and the compatibility test of common internal thread testpieces.
In Fig. 1-Fig. 2:
Frock 10, external slips tooth 11, threaded hole 12
In Fig. 3-Fig. 8:
Internal thread testpieces 100, nut 200, frock 300, operating block 301, through hole 3011, passage 3012, pulling portion 302, external slips tooth 3021, connecting portion 303, packing ring 400, bolt 500
Embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 3 to Fig. 6, Fig. 3 is the front view of a kind of embodiment of tensile test frock provided by the invention, and Fig. 4 is the A-A cut-open view of the tensile test frock in Fig. 3, and Fig. 5 is the vertical view of the tensile test frock in Fig. 3; Fig. 6 is the A position partial enlarged drawing in Fig. 3.
As shown in Figures 3 to 6, the invention provides a kind of tensile test frock 300 of non-Tension Nut 200 formula screw thread pair, this test tool 300 (comprises nut 200 for internal threads testpieces 100, and common internal thread testpieces 100) mechanical property of screw thread pair that formed with bolt 500, it comprises the pulling portion 302 by tension tester tractive, and for the through hole 3011 that bolt 500 runs through, bolt 500, after internal thread testpieces 100 coordinates, the operating side of bolt 500 (namely away from the one end of installing with internal thread testpieces) is fixed, simultaneously, tension tester tractive pulling portion 302, on-test.
It should be noted that, distinguish two ends of bolt 500 herein, stretch out from through hole 3011 and the one end coordinated with internal thread testpieces 100 is defined as traversing through end, one end is defined as operating side in addition.Correspondingly, the side that through hole 3011 has bolt 500 to stretch out be through hole 3011 pass side.
This test tool 300 is formed with operation chamber in the side that passes of through hole 3011, and bolt 500 can stretch to this operation chamber by through hole 3011, and installs with internal thread testpieces 100 in operating cavity indoor.
Because the side that passes at through hole 3011 has this operation chamber, can assemble with testpieces such as internal thread such as nut 200 grade 100 in operating cavity indoor after bolt 500 stretches into through hole 3011, install for the traversing through end of bolt 500 and internal thread testpieces 100 and advantage is provided, like this, the stress of non-Tension Nut 200 formula screw thread pair can be simulated truly, namely nut 200 or other internal thread testpieces 100 one end by workpiece against stress, test figure accurately can be obtained under this analog case true to nature.
Please refer to Fig. 7, Fig. 8, Fig. 7 is tensile test frock in Fig. 2 300 and the assembling exemplary plot of nut 200 compatibility test, and Fig. 8 is the tensile test frock 300 in Fig. 2 and the assembling exemplary plot of common internal thread testpieces 100 compatibility test.
Further, test tool 300 comprises the operating block 301 be connected with pulling portion 302, namely above-mentioned tapped through hole 3011 is opened on this operating block 301, pulling portion 302 is the cylindrical body that arranges coaxial with described operating block 301, while pulling portion 302 under tension testing machine tractive, traction force is passed to operating block 301, then is passed to bolt 500 by 301.
This operating block 301 also has passage 3012, its concrete forming process is as follows: operating block 301 offers passage 3012 in the side that passes of through hole 3011 along the direction of vertical through hole 3011, this passage 3012 is through to opposite side from the side of operating block 301 along this direction, further, through hole 3011 is through to this passage 3012.
So, namely above-mentioned passage 3012 forms the operation chamber installed for bolt 500 and internal thread testpieces 100, and can realize the stress simulating non-Tension Nut 200 formula screw thread pair.
As shown in Figure 7 and Figure 8, during test, bolt 500 is stretched into through hole 3011 gradually, simultaneously, the through hole 3011 that nut 200 in Fig. 7 or other internal thread testpieces 100 in Fig. 8 extend into passage 3012 inside is passed position corresponding to side, after bolt 500 stretches out through hole 3011, install with internal thread testpieces 100.Like this, the workpiece when position that test tool 300 and bolt 500 screw and Reality simulation are connected, thus the stress obtaining real non-Tension Nut 200 formula screw thread pair.
Pulling portion 302 is the coaxial cylindrical body arranged with through hole 3011, make whole test tool 300 elongated, and pulling portion 302 is comparatively subject to the tractive of tension tester, and smoothly, efficiently power can be passed to bolt 500, in simulation test, each test specimen is stressed; Meanwhile, operating block 301 is offered the passage 3012 run through can be completed by simple job operation, as by means of technological equipments such as moulds, then processes to get up to be more prone to.
In fact also can not form operation chamber by offering this mode of passage 3012 run through, also test tool 300 can be machined directly to the form passing side opening at through hole 3011, and by pulling portion 302 with through hole 3011 for axle is designed to the form that is arranged symmetrically with, and whole test tool 300 is in " recessed " font.
This mode also can simulate the stress of non-Tension Nut 200 formula screw thread pair truly.
Further, operating block 301 can be also cylindricality roughly, its radial dimension is greater than pulling portion 302, and also there is therebetween connecting portion 303, operating block 301 passes through this connecting portion 303 to pulling portion 302 arc transition, namely connecting portion 303 is the solid of revolution formed around the axis of pulling portion 302, and the outline of this solid of revolution is arc.
Because operating block 301 needs to offer through hole 3011 and passage 3012, its overall dimensions is unsuitable too small, otherwise will the bulk strength of operating block 301 be affected, and pulling portion 302 is pulled because needs coordinate with tension tester, its size is unsuitable excessive, otherwise by the fixed effect of impact with tension tester, therefore, the radial dimension of operating block 301 is designed to be greater than pulling portion 302.
And the two transition adopts circular arc pattern, greatly can reduce that stress that is that cause is concentrated because fillet is too little, the entirety of test tool 300 should not be damaged, longer service life.
In further scheme, each portion section of connecting portion 303 has different radial dimensions, and wherein minimum radial dimension should be less than the smallest radial size of pulling portion 302.
When pulling portion 302 coordinates with tension tester, pulling portion 302 and operating block 301 joint will bear larger stress, very easily first, damage after long-time use herein, and be unfavorable for the life-span of test tool 300, and after connecting portion 303 has the less portion's section of radial dimension, connection portion 303 is shared by the load that tension tester is applied in pulling portion 302, thus reaches the effect of off-load.
Above-mentioned passage 3012 is preferably designed to square column type, can certainly be designed to cylindrical.
Square column type just as radial dimension is more cylindrical has larger operating space, is beneficial to the configuration design of Optimum Experiment frock 300.
In further scheme, test tool 300 can also offer the path be communicated with through hole 3011 in the direction from edge outside it perpendicular to tapped through hole 3011, to make bolt 500 can be advanced into spiral shell 3011 by this path, traversing through end and the internal thread testpieces 100 of bolt 500 can be contained in operating cavity indoor.
This embodiment provides the mounting means of another kind of bolt 500, and in this embodiment, bolt 500 translation can enter through hole 3011, and tests.This structural design makes the mounting means of bolt 500 more simplify, and saves test tool 300 in the operating space axially of through hole 3011.
In the various embodiments described above, pulling portion 302 can be provided with external slips tooth 3021, thus can be fixed with the internal slip tooth of tension tester.The fixed form of this slip insert engaging is more reliable, also more easy.
The bolt 500 related to herein, with the connection procedure of test tool 300, can install plain washer 400 additional between bolt 500 and test tool 300, to obtain simulate effect more accurately.
Above one provided by the present invention non-Tension Nut formula screw thread pair tensile test frock is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (7)
1. a non-Tension Nut formula screw thread pair tensile test frock, for testing the mechanical property of the screw thread pair that internal thread testpieces (100) and bolt (500) are formed, comprise by the pulling portion of tension tester tractive (302), it is characterized in that, also comprise the through hole (3011) run through for described bolt (500), described test tool (300) is formed with operation chamber in the side that passes of described through hole (3011), described bolt (500) can penetrate to described operation chamber by described through hole (3011), and install with described internal thread testpieces (100) in described operating cavity indoor.
2. non-Tension Nut formula screw thread pair tensile test frock as claimed in claim 1, it is characterized in that, described test tool (300) also comprises the operating block (301) be connected with described pulling portion (302), described through hole (3011) is located at described operating block (301), and described pulling portion (302) is the cylindrical body that arranges coaxial with described through hole (3011); Described operating block (301) offers in the side that passes of described through hole (3011) passage (3012) run through in the direction along vertical described through hole (3011), and described passage (3012) forms described operation chamber.
3. non-Tension Nut formula screw thread pair tensile test frock as claimed in claim 2, it is characterized in that, described operating block (301) is substantially in cylindricality, its radial dimension is greater than described pulling portion (302), therebetween connecting portion (303) is also provided with, and by described connecting portion (303) arc transition.
4. non-Tension Nut formula screw thread pair tensile test frock as claimed in claim 3, it is characterized in that, described connecting portion (303) has the different each portion section of radial dimension, and the smallest radial size of each described portion section is less than described pulling portion (302).
5. non-Tension Nut formula screw thread pair tensile test frock as claimed in claim 2, it is characterized in that, described passage (3012) is square column type.
6. non-Tension Nut formula screw thread pair tensile test frock as claimed in claim 1, it is characterized in that, described test tool (300) offers from the direction along vertical described through hole (3011) outside it path be communicated with it, so that described bolt (500) is advanced into described through hole (3011) by described path, and the traversing through end of described bolt (500) and described internal thread testpieces (100) are contained in described operation chamber.
7. the non-Tension Nut formula screw thread pair tensile test frock as described in any one of claim 1-6, it is characterized in that, described pulling portion (302) is provided with external slips tooth (3021), and described external slips tooth (3021) can be fixed with the internal slip tooth of described tension tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064847.0A CN104614173A (en) | 2015-02-06 | 2015-02-06 | Tool for testing non-suspended nut type threaded pair tension force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064847.0A CN104614173A (en) | 2015-02-06 | 2015-02-06 | Tool for testing non-suspended nut type threaded pair tension force |
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| Publication Number | Publication Date |
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| CN104614173A true CN104614173A (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510064847.0A Pending CN104614173A (en) | 2015-02-06 | 2015-02-06 | Tool for testing non-suspended nut type threaded pair tension force |
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Citations (6)
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| JPH11271180A (en) * | 1998-03-23 | 1999-10-05 | Nichias Corp | Stress relaxation measuring method and device |
| JP2000009594A (en) * | 1998-06-25 | 2000-01-14 | Sanyoo Clean:Kk | Slack detector for fastener, cap member and fixing method therefor and slack alarm system for fastener |
| CN201852741U (en) * | 2010-10-29 | 2011-06-01 | 内蒙古第一机械制造（集团）有限公司 | Special fixture for bolt tension test |
| CN102494946A (en) * | 2011-11-28 | 2012-06-13 | 芜湖市中兴机械技术开发有限公司 | Tensile strength test apparatus for screw members |
| CN103226061A (en) * | 2013-03-16 | 2013-07-31 | 北京工业大学 | Normal hysteresis characteristic testing experimental device for single-bolt fixed joint surface |
| CN204389158U (en) * | 2015-02-06 | 2015-06-10 | 北京南车时代机车车辆机械有限公司 | A kind of non-Tension Nut formula screw thread pair tensile test frock |
-
2015
- 2015-02-06 CN CN201510064847.0A patent/CN104614173A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11271180A (en) * | 1998-03-23 | 1999-10-05 | Nichias Corp | Stress relaxation measuring method and device |
| JP2000009594A (en) * | 1998-06-25 | 2000-01-14 | Sanyoo Clean:Kk | Slack detector for fastener, cap member and fixing method therefor and slack alarm system for fastener |
| CN201852741U (en) * | 2010-10-29 | 2011-06-01 | 内蒙古第一机械制造（集团）有限公司 | Special fixture for bolt tension test |
| CN102494946A (en) * | 2011-11-28 | 2012-06-13 | 芜湖市中兴机械技术开发有限公司 | Tensile strength test apparatus for screw members |
| CN103226061A (en) * | 2013-03-16 | 2013-07-31 | 北京工业大学 | Normal hysteresis characteristic testing experimental device for single-bolt fixed joint surface |
| CN204389158U (en) * | 2015-02-06 | 2015-06-10 | 北京南车时代机车车辆机械有限公司 | A kind of non-Tension Nut formula screw thread pair tensile test frock |
Non-Patent Citations (2)
| Title |
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| （荷兰）亚伯.斯海维著，吴学仁等译: "《结构与材料的疲劳（第2版）》", 31 January 2014, 航空工业出版社 * |
| 李坚主编: "《紧固件出口产品标准解析》", 31 July 2013, 上海科学技术出版社 * |
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| CB02 | Change of applicant information |
Address after: 102249 Beijing ChangPing Railway Station, west of Changping District, 500 meters Applicant after: Beijing CRRC Heavy Industry Mechanics Co., Ltd. Address before: 102249 Beijing ChangPing Railway Station, west of Changping District, 500 meters Applicant before: Beijing CSR Times Heavy Industry Machinery Co., Ltd. |
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Application publication date: 20150513 |
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| RJ01 | Rejection of invention patent application after publication |