CN104297058A - Test piece clamping and loading device for fretting fatigue test - Google Patents
Test piece clamping and loading device for fretting fatigue test Download PDFInfo
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- CN104297058A CN104297058A CN201410590091.9A CN201410590091A CN104297058A CN 104297058 A CN104297058 A CN 104297058A CN 201410590091 A CN201410590091 A CN 201410590091A CN 104297058 A CN104297058 A CN 104297058A
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Abstract
The invention discloses a test piece clamping and loading device for a fretting fatigue test. The device comprises two parts, namely a square foot bridge loading clamp and a support frame, wherein the square foot bridge loading clamp comprises a square foot bridge loading bracket, a loading force adjusting bolt, a square foot bridge mounting seat, an elastic ring, a force sensor and the like; the support frame comprises support frame transverse beams, support frame longitudinal beams, upright post clamping plates, pressing plates and the like. During the use of the device, a pulling-pressing test piece and the upright post clamping plates are fixed well, the square foot bridge loading clamp is placed on the support frame longitudinal beams, the loading force adjusting bolt is rotated to adjust the pressing force of a square foot bridge, and then, the pressing plates are used for pressing the square foot bridge mounting seat on the support frame longitudinal beams. According to the invention, the measurable and controllable pressing force on the pulling-pressing test piece is provided, the influence on the test piece from the unbalanced pressing force on the two sides of the pulling-pressing test piece caused by errors of clamp manufacturing and mounting is eliminated through the utilization of the free state of the square foot bridge during loading, and the distribution error of the pressing force on the test piece is reduced, so that the test precision is improved.
Description
Technical field
The invention belongs to a kind of fatigue experimental device, relate to and be a kind ofly attached to test specimen clamping on fretting fatigue testing machine and snap-in force charger, specifically a kind of fretting fatigue testing test specimen clamping and charger.
Background technology
Fretting fatigue is present in the every field of social life, is the one of the main reasons that bolt connects the key position inefficacy of physical construction.Between bolted two Assembly part faying faces, be subject to tensile, compressive, bending due to during work, the multi-form transient mechanical load such as turn round, part produces small rigid body displacement and distortion, and the part of therefore faying face contact also exists fine motion, and long term can cause part failure.At present, in the process of carrying out fretting fatigue testing, due to the existence of fixture mismachining tolerance and rigging error, be difficult to ensure that the centering of test specimen seal face requires and the coherence request of test specimen both sides snap-in force.For the feature of plane-plane contact between the sufficient bridge in side and tension and compression test specimen, require that the sufficient end face malleation in side of two side's sufficient bridge test specimens is in the plane of tension and compression test specimen, and the equal and opposite in direction of snap-in force, and existing fine motion fixture can not ensure these requirements well, easily cause test specimen to produce moment of flexure and snap-in force skewness on test specimen, affect accuracy and the consistance of test figure.
Summary of the invention
For solving the problem, the invention provides a kind of fretting fatigue testing test specimen clamping and charger, on the basis of original fretting fatigue testing machine, adopt the present invention can realize the automatic centering of the sufficient bridge in the side of loading, effectively solve the incomplete problem of plane-plane contact; The present invention can realize two side foot bridges and load tension and compression test specimen simultaneously, and can ensure the equal and opposite in direction of both sides loading force, improves accuracy and the reliability of test to a great extent; The present invention only needs a force snesor just can realize loading demand, greatly reduces manufacturing cost.
The technical scheme that the present invention is adopted to achieve these goals is: a kind of fretting fatigue testing test specimen clamping and charger, and the sufficient bridge in the side of comprising loads fixture and bracing frame, support frame as described above comprises bracing frame crossbeam, bracing frame longeron and column clamping plate, the bracing frame crossbeam of support frame as described above is connected by bracing frame longeron trip bolt with bracing frame longeron, and positioned by conical dowel pin, column clamping plate and bracing frame longeron are combined to form circular hole, connected by bracing frame fastening bolt, can be fixed on the column of fretting fatigue testing machine, described side's foot bridge loads the sufficient bridge loading frame in the fixture side of comprising, force snesor, elastic ring, loading bolt, the sufficient bridge in side, the sufficient bridge mount pad in side and loading force adjusting bolt, described side's foot bridge loading frame is rectangular frame, force snesor is by the side of the sufficient bridge loading frame in the force snesor fastening bolt side of being connected to, elastic ring is connected with force snesor by elastic ring trip bolt, elastic ring connects loading bolt, two sufficient bridges in side are separately fixed on two sufficient bridge mount pads in side by four side's sufficient bridge erection bolts, the sufficient bridge mount pad in side is placed on bracing frame crossbeam, and fixed by pressing plate and bridge screw, move with the above-below direction position of the sufficient bridge mount pad in the side of restriction, described loading force adjusting bolt is threaded connection the opposite side of the sufficient bridge loading frame in the side of being arranged on, described force snesor, elastic ring, loading bolt, two side's sufficient bridge mount pads, two sufficient bridges in side and loading force adjusting bolts word order in the sufficient bridge loading frame in side, when tightening loading force adjusting bolt, the sufficient bridge in side produces the contrary snap-in force in equal and opposite in direction direction.
The head of described loading bolt and loading force adjusting bolt is spherical structure, there is hemispheric pit at the bolt of described side foot bridge mount pad position of exerting pressure, when tightening loading bolt, the other side's foot bridge seal face on the sufficient bridge mount pad in side can automatically and tension and compression test specimen two side plane keeping parallelism, the face-face Full connected of the sufficient bridge plane in the side of ensure that and test specimen.
The sufficient bridge in described side loads fixture can be freely movable before fixing with pressing plate, loading bolt and elastic ring are for being fixedly connected with, when rotating loading force adjusting bolt, because itself and the sufficient bridge loading frame in side are for being threaded, due to the relation of acting force and reacting force, sensor, elastic ring and loading bolt move to tension and compression test specimen with loading frame, thus ensure that the loading force size of tension and compression test specimen both sides is identical.
The invention has the beneficial effects as follows: be face-face contact between side's foot bridge of the present invention and tension and compression test specimen, effectively simulate the fine motion state between two bolt connection piece planes; Can realize by the present invention the snap-in force equal and opposite in direction being added in tension and compression test specimen both sides, eliminate the impact of moment of flexure on test findings; The present invention only just can realize required snap-in force measurement function with a force snesor, reduces experimentation cost; The ball-joint design that the sufficient bridge in side loads the free state of fixture when applying snap-in force and loading bolt head ensure that consistance and the homogeneity of two sides foot bridge snap-in forces, reduces assembly difficulty.Compare with traditional fretting fatigue testing piece fixture, tension and compression test specimen snap-in force of the present invention applies and adjusts more convenient, and the accuracy of power more easily ensures.
Accompanying drawing explanation
Fig. 1 is the structural representation before the present invention does not install pressing plate.
Fig. 2 is the structural representation of supporting frame part.
Fig. 3 is the structural representation that in the present invention, the sufficient bridge in side loads holder part.
Fig. 4 is one-piece construction schematic diagram of the present invention.
In figure: 1, the sufficient bridge in side loads fixture, 2, bracing frame, 3, pressing plate, 4, tension and compression test specimen, 5, bridge screw, 6, loading force adjusting bolt, 7, the sufficient bridge erection bolt in side, 8, the sufficient bridge mount pad in side, 9, the sufficient bridge in side, 10, loading bolt, 11, elastic ring, 12, elastic ring trip bolt, 13, force snesor, 14, force snesor fastening bolt, 15, bracing frame fastening bolt, 16, column clamping plate, 17, bracing frame longeron, 18, bracing frame crossbeam, 19, follower bolt hole, 20, bracing frame longeron trip bolt, 21, conical dowel pin, 22, the sufficient bridge loading frame in side.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
A kind of fretting fatigue testing test specimen clamping and charger, as shown in Figure 1, the sufficient bridge in the side of comprising loads fixture 1 and bracing frame 2, wherein bracing frame 2 as shown in Figure 2, comprise bracing frame crossbeam 18, bracing frame longeron 17 and column clamping plate 16, bracing frame crossbeam 18 is connected by bracing frame longeron trip bolt 20 with bracing frame longeron 17, and positioned by conical dowel pin 21, column clamping plate 16 and bracing frame longeron 17 are combined to form circular hole, connected by bracing frame fastening bolt 15, can be fixed on the column of fretting fatigue testing machine, the sufficient bridge in side loads fixture 1 as shown in Figure 3, the sufficient bridge loading frame 22 in the side of comprising, force snesor 13, elastic ring 11, loading bolt 10, the sufficient bridge 9 in side, the sufficient bridge mount pad 8 in side and loading force adjusting bolt 6, the sufficient bridge loading frame 22 in side is rectangular frame, force snesor 13 is by the side of the sufficient bridge loading frame 22 in force snesor fastening bolt 14 side of being connected to, elastic ring 11 is connected with force snesor 13 by elastic ring trip bolt 12, elastic ring 11 connects loading bolt 10, two sufficient bridges in side 9 are separately fixed on two sufficient bridge mount pads 8 in side by four side's sufficient bridge erection bolts 7, the sufficient bridge mount pad 8 in side is placed on the bracing frame crossbeam 18 of bracing frame 2, and fixed by pressing plate 3 as shown in Figure 4 and bridge screw 5, move with the above-below direction position of the sufficient bridge mount pad 8 in the side of restriction, loading force adjusting bolt 6 is threaded connection the opposite side of the sufficient bridge loading frame 22 in the side of being arranged on, described force snesor 13, elastic ring 11, loading bolt 10, two side's sufficient bridge mount pads, 8, two sufficient bridges in side 9 and loading force adjusting bolt 6 be word order in the sufficient bridge loading frame 22 in side, when tightening loading force adjusting bolt 6, the sufficient bridge 9 in side produces the contrary snap-in force in equal and opposite in direction direction.
Loading bolt 10 is spherical structure with the head of loading force adjusting bolt 6, there is hemispheric pit at side's sufficient bridge mount pad bolt 7 position of exerting pressure of the sufficient bridge mount pad 8 in side, when tightening loading bolt 10, the other side's foot bridge 9 seal face on the sufficient bridge mount pad 8 in side can automatically and tension and compression test specimen two side plane keeping parallelism, the face-face Full connected of the sufficient bridge plane in the side of ensure that and test specimen; The fit structure of sufficient bridge mount pad 8 both sides, side and bolt is ball-joint, can be pressed on tension and compression surface of test piece uniformly, realize the homogeneity of surface of test piece snap-in force for guarantor's foot bridge plane.
The sufficient bridge in side loads fixture 1 can be freely movable before fixing with pressing plate 3, loading bolt 10 and elastic ring 11 are for being fixedly connected with, when rotating loading force adjusting bolt 6, because itself and the sufficient bridge loading frame 22 in side are for being threaded, due to the relation of acting force and reacting force, force snesor 13, elastic ring 11 and loading bolt 10 move to tension and compression test specimen 4 with the sufficient bridge loading frame 22 in side, thus ensure that the loading force size of tension and compression test specimen 4 both sides is identical.
First the present invention will assemble bracing frame 2 when mounted, by bracing frame longeron 17 and column clamping plate 16 involutory, middle formation circular hole, connect with bracing frame fastening bolt 15, bracing frame longeron 17 and bracing frame crossbeam 18 are located it by conical dowel pin 21, and link together with bracing frame longeron trip bolt 20, leveling is carried out to bracing frame 2, and it is moved on suitable height fastening on the column of fatigue tester; The sufficient bridge in following assembling side loads fixture 1, force snesor 13 is by the sufficient bridge loading frame 22 in force snesor fastening bolt 14 side of being fixed on, elastic ring 11 and force snesor 13 are fixed together by elastic ring trip bolt 12, loading bolt 10 is fixed on elastic ring, the sufficient bridge mount pad 8 in side is connected by the sufficient bridge erection bolt 7 in side with the sufficient bridge 9 in side, loading force adjusting bolt 6 is threaded connection on the sufficient bridge loading frame 1 in side, in the ball-and-socket of the sufficient bridge mount pad in the end bulb side of withstanding on of loading bolt 10 and loading force adjusting bolt 6.
When the present invention works, first sufficient for the side assembled bridge being loaded fixture 1 is placed on bracing frame crossbeam 18, tension and compression test specimen 4 is through being fixed on the piece-holder head of fatigue tester two sufficient bridges 9 in side, then the size that loading force adjusting bolt 6 coordinate force sensor 13 regulates loading force is rotated, due to acting force and reacting force, loading bolt 10 also promotes the sufficient bridge in left side side and presses to test specimen, realizes the equal and opposite in direction of test specimen both sides snap-in force.After snap-in force size meets the requirements, pressing plate 3 is fixed on bracing frame crossbeam 18 by bridge screw 5, because the sufficient bridge mount pad 8 in side suppose that sufficient bridge loading frame 22 is high, so can not move up and down by guarantor's foot bridge mount pad 8.Move up and down during the work of piece-holder head, tension and compression test specimen 4 is subject to Tension and Compression effect and extends and shorten, and side can not move sufficient bridge 9 position, between the seal face of the sufficient bridge 9 of tension and compression test specimen 4 and side, produce oligodynamics.
The foregoing is only a specific embodiment of the present invention, but architectural feature of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (3)
1. fretting fatigue testing test specimen clamping and a charger, is characterized in that: the sufficient bridge in the side of comprising loads fixture and bracing frame, support frame as described above comprises bracing frame crossbeam, bracing frame longeron and column clamping plate, the bracing frame crossbeam of support frame as described above is connected by bracing frame longeron trip bolt with bracing frame longeron, and positioned by conical dowel pin, column clamping plate and bracing frame longeron are combined to form circular hole, connected by bracing frame fastening bolt, can be fixed on the column of fretting fatigue testing machine, described side's foot bridge loads the sufficient bridge loading frame in the fixture side of comprising, force snesor, elastic ring, loading bolt, the sufficient bridge in side, the sufficient bridge mount pad in side and loading force adjusting bolt, described side's foot bridge loading frame is rectangular frame, force snesor is by the side of the sufficient bridge loading frame in the force snesor fastening bolt side of being connected to, elastic ring is connected with force snesor by elastic ring trip bolt, elastic ring connects loading bolt, two sufficient bridges in side are separately fixed on two sufficient bridge mount pads in side by four side's sufficient bridge erection bolts, the sufficient bridge mount pad in side is placed on bracing frame crossbeam, and fixed by pressing plate and bridge screw, move with the above-below direction position of the sufficient bridge mount pad in the side of restriction, described loading force adjusting bolt is threaded connection the opposite side of the sufficient bridge loading frame in the side of being arranged on, described force snesor, elastic ring, loading bolt, two side's sufficient bridge mount pads, two sufficient bridges in side and loading force adjusting bolts word order in the sufficient bridge loading frame in side, when tightening loading force adjusting bolt, the sufficient bridge in side produces the contrary snap-in force in equal and opposite in direction direction.
2. a kind of fretting fatigue testing test specimen clamping according to claim 1 and charger, it is characterized in that: the head of described loading bolt and loading force adjusting bolt is spherical structure, there is hemispheric pit at the bolt of described side foot bridge mount pad position of exerting pressure, when tightening loading bolt, the other side's foot bridge seal face on the sufficient bridge mount pad in side can automatically and tension and compression test specimen two side plane keeping parallelism, the face-face Full connected of the sufficient bridge plane in the side of ensure that and test specimen.
3. a kind of fretting fatigue testing test specimen clamping according to claim 1 and charger, it is characterized in that: the sufficient bridge in described side loads fixture can be freely movable before fixing with pressing plate, loading bolt and elastic ring are for being fixedly connected with, when rotating loading force adjusting bolt, because itself and the sufficient bridge loading frame in side are for being threaded, due to the relation of acting force and reacting force, sensor, elastic ring and loading bolt move to tension and compression test specimen with loading frame, thus ensure that the loading force size of tension and compression test specimen both sides is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410590091.9A CN104297058B (en) | 2014-10-29 | 2014-10-29 | A kind of fretting fatigue testing test specimen clamping and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410590091.9A CN104297058B (en) | 2014-10-29 | 2014-10-29 | A kind of fretting fatigue testing test specimen clamping and charger |
Publications (2)
| Publication Number | Publication Date |
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| CN104297058A true CN104297058A (en) | 2015-01-21 |
| CN104297058B CN104297058B (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410590091.9A Expired - Fee Related CN104297058B (en) | 2014-10-29 | 2014-10-29 | A kind of fretting fatigue testing test specimen clamping and charger |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259059A (en) * | 2015-11-23 | 2016-01-20 | 江苏大学 | Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device |
| CN105675412A (en) * | 2016-01-14 | 2016-06-15 | 西南交通大学 | Bending fretting fatigue experimental equipment and experimental method |
| CN106680068A (en) * | 2016-11-30 | 2017-05-17 | 岭东核电有限公司 | Constant normal force loading device and constant normal force loading method in fretting fatigue test |
| CN106969974A (en) * | 2017-03-22 | 2017-07-21 | 安徽正钧信息科技有限公司 | A kind of grip device of test mechanical performance |
| CN109100219A (en) * | 2018-05-31 | 2018-12-28 | 西北工业大学 | Fretting fatigue testing device and method |
| CN110132739A (en) * | 2019-05-24 | 2019-08-16 | 北京航空航天大学 | A kind of fretting fatigue testing normal load loading device and method |
| CN110702502A (en) * | 2019-10-17 | 2020-01-17 | 浙江理工大学 | Composite material plate pre-compression clamping method |
| CN112985987A (en) * | 2021-02-08 | 2021-06-18 | 清华大学 | Multidirectional static force loading device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201622210U (en) * | 2010-03-16 | 2010-11-03 | 陈跃良 | Adjustable fretting fatigue tester |
| CN102087186A (en) * | 2011-01-26 | 2011-06-08 | 复旦大学 | Fretting fatigue test platform |
| CN102359870A (en) * | 2011-08-31 | 2012-02-22 | 桂林福达股份有限公司 | Diaphragm spring fatigue test tooling |
| CN102901678A (en) * | 2011-07-28 | 2013-01-30 | 福建浔兴拉链科技股份有限公司 | Detection apparatus for fatigue strength of zipper |
| CN202886185U (en) * | 2012-09-21 | 2013-04-17 | 苏州热工研究院有限公司 | Clamping device for pipe-plate line contact fretting wear test |
| JP2014115162A (en) * | 2012-12-07 | 2014-06-26 | Mitsubishi Heavy Ind Ltd | Fretting fatigue testing device |
-
2014
- 2014-10-29 CN CN201410590091.9A patent/CN104297058B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201622210U (en) * | 2010-03-16 | 2010-11-03 | 陈跃良 | Adjustable fretting fatigue tester |
| CN102087186A (en) * | 2011-01-26 | 2011-06-08 | 复旦大学 | Fretting fatigue test platform |
| CN102901678A (en) * | 2011-07-28 | 2013-01-30 | 福建浔兴拉链科技股份有限公司 | Detection apparatus for fatigue strength of zipper |
| CN102359870A (en) * | 2011-08-31 | 2012-02-22 | 桂林福达股份有限公司 | Diaphragm spring fatigue test tooling |
| CN202886185U (en) * | 2012-09-21 | 2013-04-17 | 苏州热工研究院有限公司 | Clamping device for pipe-plate line contact fretting wear test |
| JP2014115162A (en) * | 2012-12-07 | 2014-06-26 | Mitsubishi Heavy Ind Ltd | Fretting fatigue testing device |
Non-Patent Citations (1)
| Title |
|---|
| 欧阳祖行 等: "微动疲劳损伤试验设计研究", 《航空学报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259059A (en) * | 2015-11-23 | 2016-01-20 | 江苏大学 | Contrast test method for improving fretting fatigue resistance performance of material by laser shot blasting strengthening and test sample clamping device |
| CN105259059B (en) * | 2015-11-23 | 2017-08-11 | 江苏大学 | Laser peening reinforcing improves the contrast test method and sample clamping device of material fretting fatigue resistance energy |
| CN105675412A (en) * | 2016-01-14 | 2016-06-15 | 西南交通大学 | Bending fretting fatigue experimental equipment and experimental method |
| CN106680068A (en) * | 2016-11-30 | 2017-05-17 | 岭东核电有限公司 | Constant normal force loading device and constant normal force loading method in fretting fatigue test |
| CN106969974A (en) * | 2017-03-22 | 2017-07-21 | 安徽正钧信息科技有限公司 | A kind of grip device of test mechanical performance |
| CN109100219A (en) * | 2018-05-31 | 2018-12-28 | 西北工业大学 | Fretting fatigue testing device and method |
| CN109100219B (en) * | 2018-05-31 | 2021-04-27 | 西北工业大学 | Fretting fatigue test device and method |
| CN110132739A (en) * | 2019-05-24 | 2019-08-16 | 北京航空航天大学 | A kind of fretting fatigue testing normal load loading device and method |
| CN110702502A (en) * | 2019-10-17 | 2020-01-17 | 浙江理工大学 | Composite material plate pre-compression clamping method |
| CN112985987A (en) * | 2021-02-08 | 2021-06-18 | 清华大学 | Multidirectional static force loading device |
| CN112985987B (en) * | 2021-02-08 | 2022-04-29 | 清华大学 | Multidirectional static force loading device |
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| CN104297058B (en) | 2016-10-05 |
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