CN205333440U - Radial cyclic loading test fixture of metal tubular product - Google Patents
Radial cyclic loading test fixture of metal tubular product Download PDFInfo
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- CN205333440U CN205333440U CN201520963373.9U CN201520963373U CN205333440U CN 205333440 U CN205333440 U CN 205333440U CN 201520963373 U CN201520963373 U CN 201520963373U CN 205333440 U CN205333440 U CN 205333440U
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Abstract
The utility model discloses a radial cyclic loading test fixture of metal tubular product for to the centre gripping of tubular product among the metal tubular product hoop fatigue test, including two clamps, articulated the piece on every clamp, hang a piece slidable and install on the clamp, one side of hanging the piece is equipped with the semi -cylindrical boss, hangs the piece to carried forward messenger semi -cylindrical boss amalgamation becoming cylinder for two, is equipped with the half circle ring clamping ring in the outside of every semi -cylindrical boss, the arc length of half circle ring clamping ring is less than 12 circumference, and half circle ring clamping ring and semi -cylindrical boss remain the clearance in order to allow the tubular product sample to install in wherein. Adopt the utility model discloses a scheme is prepared series and is hung the piece, the external diameter and the various tubular product phase -matchs of semi -cylindrical boss, and need not change the clamp, alright satisfy different pipe diameter metal tubular product the hoop fatigue performance can the test. Anchor clamps simple structure, convenient operation, the commonality is strong, saves the test material.
Description
Technical field
This utility model relates to a kind of metal pipe material radial circulation load test fixture, particularly a kind of small-caliber metal tubes material hoop fatigue test clamper, the test of the especially pulsation of tubing hoop, stretching and drawingand pressing fatigue performance, belongs to materials mechanics experimental equipment field。
Background technology
Metal pipe material is the strip round section bar of a kind of hollow, is widely used mainly in industrial transportation pipe line and the machine structural parts etc. such as oil, chemical industry, medical treatment, food, light industry, machinery instrument, aviation。It addition, when bending, torsional strength are identical, lighter in weight, so being also widely used in manufacture machine components and engineering structure, also it is commonly used for production various conventional weapons, gun barrel, shell, fluid pressure line etc.。
Metal pipe material is prepared mainly by cold-rolling process, easily forms texture, cause the anisotropy of material mechanical performance in deformation engineering。Under running conditions, often hoop stress is more than axially, and also can bear fatigue load, such as hydraulic air pipe-line system for tubing。Axial mechanical property can not simply replace hoop mechanical property, it is also difficult to speculates the mechanical property of hoop。Tubing axial dimension is relatively big, and clamping is relatively easy, and current mechanical properties of tubular goods is mainly axially tested along tubing。(tubing high temperature low-cycle fatigue experimental technique and data process Li Yuanrui and Chen Lin, China YouSe Acta Metallurgica Sinica, 2003,13:pp721-726) insert stifled bar at-Ti titanium alloy pipe two, then with the clamping of testing machine hydraulic clamp, in the middle part of tubular product sample, grinding goes out arcuate groove, tests tubing high temperature low-cycle fatigue axial property。Li Yuanrui etc. (The high temperature low-cycle fatigue performance study of titanium alloy pipe, Nuclear Power Engineering, 2003,24:pp307-311) have studied the axial low-cycle fatigue life of zirconium alloy tube and circulation individual features with same method。Tubing hoop mechanical property adopts the opposite opened pulling method of similar opposite opened tension plate method (NOL) to carry out substantially, but sample is not fixed, the rigidity of structure is not high, fatigue test chance occurs to open to shake, frequency of vibration is not high, the problems such as meeting load overshoot, cause test cannot be carried out or data are forbidden。There is no any technical scheme realizing small-caliber metal tubes material hoop fatigue property test and corresponding fixture at present。
Utility model content
The purpose of this utility model is to provide a kind of metal pipe material radial circulation load test fixture, fill up current material test metal and metal pipe material hoop cannot be carried out the blank of fatigue of materials performance test, realize the pulsation of small diameter metal tubing and draw pulling fatigue experimental, adjust the gap between 2 hanging block semi-circular boss, moreover it is possible to carry out repeated tension and compression test。
The purpose of this utility model implements by the following technical programs:
A kind of metal pipe material radial circulation load test fixture, for clamping to tubing in metal pipe material hoop fatigue test, including two clamps, each clamp is mounted with hanging block, hanging block is slidably mounted on clamp, the side of hanging block is provided with semi-cylindrical boss, semi-cylindrical boss split is made to become cylinder after two hanging block docking, it is provided with semi-circular shape pressure ring in the outside of each semi-cylindrical boss, the arc length of described semi-circular shape pressure ring is less than 1/2 circumference, and remain with gap between described semi-circular shape pressure ring and semi-cylindrical boss, described gap allows to install tubular product sample。
The diameter of described metal pipe material is less than 50mm。
Thread mill drilling on the outer round surface of semi-cylindrical boss, and correspondence on semi-circular shape pressure ring, have screwed hole, when annular pressure ring is arranged on tubular product sample outside, through semi-circular shape pressure ring and it is connected on semi-cylindrical boss by screw, so that tubular product sample is fixed。
Further, described semi-circular shape pressure ring and semi-cylindrical boss are coaxially disposed。
Clamp is provided with the chute being connected and slide block is had radially position-limiting action with hanging block, and hanging block can slide in chute, and hanging block direction beyond glide direction is carried out spacing by chute。
Preferably, described chute is dove tail shape or T-slot shape。
Further preferred, the sidewall of chute has screwed hole, is connected in screwed hole so that hanging block is locked by lock-screw。
Being provided with location structure between described clamp, between described hanging block or between described semi-cylindrical boss, in order to guide location, after making two clamp docking, two semi-cylindrical boss splits become cylinder。
Described location structure can be taper, trapezoidal, rectangle, circle or triangle。
Described clamp is provided with connector, is driven to both sides by two clamps by the connector on two clamps, and described connector is one-body molded with clamp or is connected on clamp by dismountable mode。
It is further preferred that described connector is screw rod or corrugated tubing。
Described connector and described semi-cylindrical boss are located along the same line, and the axis of described connector is through the center line of semi-cylindrical boss, when making connector be pulled to both sides by clamp, the test tubing being socketed on semi-cylindrical boss apply the pulling force of forward。
Further preferred, two described clamps, hanging blocks are symmetrical structure, and are symmetrically installed。
When actual tests, first from metal pipe material along the axially cutting one section of tubing (being generally 3-5mm pipeline section) of vertical tubing as tubular product sample, end face polishes。Upper lower clamp is connected with fatigue machine by the connector on top, more locked with lock-screw。Hanging block coattail end inserts in the dovetail groove of clamp bottom, 2 fastening bolts, respectively from the both sides screwed hole of clamp, in the screwed hole of precession hanging block, clamp and hanging block is tightened and is integrated。The upper lower chuck of nigration machine, makes 2 semi-cylindrical boss of hanging block in lower clamp close up, is inserted in wherein by tubular product sample。Then semi-circular shape pressure ring is placed on sample, by fastening bolt, is screwed into the screw on semi-cylindrical boss, tubular product sample is firmly compressed。Open testing machine, apply the fatigue load and the frequency that set, it is possible to obtain the test datas such as the fatigue strength of tubing hoop, fatigue life and S-N curve。
Adopting scheme of the present utility model, prepare series hanging block, the external diameter of semi-cylindrical boss and various tubing match, and without changing clamp, just can meet the test of the hoop fatigue behaviour of different tube diameters metal pipe material。Clamp structure is simple, easy to operate, highly versatile, saves test material。
Accompanying drawing explanation
Below according to drawings and Examples, this utility model is described in further detail。
Fig. 1 is the Facad structure schematic diagram of metal pipe material radial circulation load test fixture described in this utility model embodiment, eliminates semi-circular shape pressure ring in figure。
Fig. 2 is the side structure schematic diagram of metal pipe material radial circulation load test fixture described in this utility model embodiment, eliminates semi-circular shape pressure ring in figure。
Fig. 3 is the front assembling schematic diagram of metal pipe material radial circulation load test fixture described in this utility model embodiment。
Fig. 4 is the side assembling schematic diagram of metal pipe material radial circulation load test fixture described in this utility model embodiment。
Fig. 5 is the another kind of structural representation of metal pipe material radial circulation load test fixture described in this utility model embodiment, eliminates semi-circular shape pressure ring in figure；
Wherein: 1-clamp, 2-hanging block, 3-semi-cylindrical boss, 4-semi-circular shape pressure ring, 5-connector, 6-location structure, 7-chute。
Detailed description of the invention
Hereinafter preferred embodiment of the present utility model is illustrated, it will be appreciated that preferred embodiment described herein is merely to illustrate and explains this utility model, be not used to limit this utility model。
Embodiment one
As Figure 1-4, a kind of metal pipe material radial circulation load test fixture described in this utility model embodiment, for clamping to tubing in metal pipe material hoop fatigue test, including two clamps 1, each clamp is mounted with hanging block 2, hanging block 2 can be slidably mounted on clamp 1, the side of hanging block 2 is provided with semi-cylindrical boss 3, semi-cylindrical boss 3 split is made to become cylinder after two hanging block 2 docking, it is provided with semi-circular shape pressure ring 4 in the outside of each semi-cylindrical boss 3, the arc length of described semi-circular shape pressure ring 4 is less than 1/2 circumference, and remain with gap between described semi-circular shape pressure ring and semi-cylindrical boss, described gap allows to install tubular product sample。
The diameter of described metal pipe material is less than 50mm。
Thread mill drilling on the outer round surface of semi-cylindrical boss 3, and correspondence on semi-circular shape pressure ring 4, have screwed hole, when semi-circular shape pressure ring is arranged on tubular product sample outside, through semi-circular shape pressure ring and it is connected on semi-cylindrical boss by screw, so that tubular product sample is fixed。
Further, being coaxially disposed of described semi-circular shape pressure ring and semi-cylindrical boss。
Clamp 1 is provided with the chute 7 being connected and slide block is had radially position-limiting action with hanging block, makes hanging block can slide in chute 7 and carries out spacing to hanging block direction beyond glide direction。
Preferably, described chute 7 is dove tail shape or T-slot shape。
Further preferred, the sidewall of chute 7 has screwed hole, is arranged in screwed hole by lock-screw and hanging block 2 is locked。
As it is shown in figure 5, be provided with location structure 6 between described clamp 1, between described hanging block 2 or between described semi-cylindrical boss 3, in order to guide location, after making two clamp docking, the split of two semi-cylindrical boss 3 becomes cylinder。
Described location structure 6 can be taper, trapezoidal, rectangle, circle or triangle。
Described clamp 1 is provided with connector 5, is driven to both sides by two clamps by the connector 5 on two clamps 1, and described connector is one-body molded with clamp or is connected on clamp by dismountable mode。
It is further preferred that described connector 5 is screw rod or corrugated tubing。
Described connector 5 is located along the same line with described semi-cylindrical boss 3, the center line of the axis traverse semi-cylindrical boss 3 of described connector 5, when making connector 5 be pulled to both sides by clamp 1, the test tubing being socketed on semi-cylindrical boss is applied the pulling force of forward。
Further preferred, two described clamps 1, hanging blocks 2 are symmetrical structure, and are symmetrically installed。
When actual tests, generally along the axially cutting 3-5mm pipeline section of vertical tubing as tubular product sample, both ends of the surface polish。Upper lower clamp is connected with fatigue machine by the bolt on top, more locked with holding out against lock-screw。Hanging block coattail end inserts in the dovetail groove of clamp bottom, 2 fastening bolts, respectively from the both sides screwed hole of clamp, in the screwed hole of precession hanging block, clamp and hanging block is tightened and is integrated。The upper lower chuck of nigration machine, makes 2 semi-cylindrical boss of hanging block in lower clamp close up, is inserted in wherein by tubular product sample。Then semi-circular shape pressure ring is placed on sample, by fastening bolt, is screwed into the screw on semi-cylindrical boss, sample is firmly compressed。Open testing machine, apply the fatigue load and the frequency that set, it is possible to obtain the test datas such as the fatigue strength of tubing hoop, fatigue life and S-N curve。
Adopting scheme of the present utility model, prepare series hanging block, the external diameter of semi-cylindrical boss and various tubing match, and without changing clamp, just can meet the test of the hoop fatigue behaviour of different tube diameters metal pipe material。Clamp structure is simple, easy to operate, highly versatile, saves test material。
Embodiment two
The tubular product sample of the present embodiment test is the TA18 titanium alloy pipe of Φ 15.88 × 0.81mm (pipe external diameter × wall thickness), and the length of tubular product sample is 3mm。
Clamp material is Cr12MoV, and Q-tempering heat treatment, hardness reaches HR40-55。Upper lower clamp is connected with testing machine respectively through screw rod, dovetail type pin hanging block is inserted the dovetail type groove of clamp lower end, the diameter of prominent half round platform is 13mm, upper lower clamp is positioned at side, fine setting testing machine chuck, making the alignment of the semi-cylindrical boss in lower clamp close up, become cylinder, sample is inserted in the hanging block of truncated cone-shaped。Sample is placed semi-circular shape pressure ring, pressure ring wall thickness 4mm, with the bolt of a M4X7, is arranged on the centre of semi-circular shape pressure ring, sample is fastened on semi-cylindrical boss。Fatigue test carries out on MTS810 universal testing machine, and temperature is room temperature, and test adopts unsymmetrical circulation, and Loaded contact analysis is sinusoidal wave。
Embodiment three
The tubing of the present embodiment test is the stainless steel pipe of φ 19.05 × 0.99mm (pipe external diameter × wall thickness), and the length of tubing is 5mm。
Clamp material is 40CrNiMo, and Q-tempering heat treatment, hardness reaches HR40-55。Upper lower clamp is connected with testing machine respectively through screw rod, dovetail type pin hanging block is inserted the dovetail type groove of clamp lower end, the diameter of semi-cylindrical boss is 16mm, upper lower clamp is positioned at side, fine setting testing machine chuck, making the alignment of the semi-cylindrical boss in lower clamp close up, become cylinder, sample is inserted in round platform hanging block。Extensometer rubber band is fixed on upper and lower two semi-cylindrical boss simultaneously。Placing semi-circular shape pressure ring on sample, pressure ring wall thickness 4mm, with the bolt of 2 M4X7,60 ° of interval is uniformly arranged on pressure ring, and sample is fastened on semi-cylindrical boss。Fatigue test carries out in the nation 10kN high-cycle fatigue Material Testing Machine of Changchun thousand, and temperature is room temperature, and test adopts unsymmetrical circulation to draw fatigue, frequency 70Hz。
Technology contents of the present utility model and technical characteristic have revealed that as above; but those of ordinary skill in the art are still potentially based on teaching of the present utility model and announcement and do all replacements without departing substantially from this utility model spirit and modification; therefore; this utility model protection domain should be not limited to the content that embodiment is disclosed; and should include various without departing substantially from replacement of the present utility model and modification, and contained by this utility model claim。
Claims (12)
1. a metal pipe material radial circulation load test fixture, including two clamps (1), it is characterized in that, each clamp is mounted with hanging block (2), hanging block is slidably mounted on clamp, the side of hanging block is provided with semi-cylindrical boss (3), two hanging blocks can become cylinder by docking split, it is provided with semi-circular shape pressure ring (4) in the outside of each semi-cylindrical boss, the arc length of described semi-circular shape pressure ring is less than 1/2 circumference, and remain with gap between described semi-circular shape pressure ring and semi-cylindrical boss, described gap allows to install tubular product sample。
2. a kind of metal pipe material radial circulation load test fixture according to claim 1, it is characterized in that, on the outer round surface of semi-cylindrical boss, processing has screwed hole, and correspondence on semi-circular shape pressure ring, have screwed hole, tubular product sample can be clamped by annular pressure ring staggered relatively, and semi-circular shape pressure ring and semi-cylindrical boss are connected by screw。
3. a kind of metal pipe material radial circulation load test fixture according to claim 2, it is characterised in that described semi-circular shape pressure ring and semi-cylindrical boss are coaxially disposed。
4. a kind of metal pipe material radial circulation load test fixture according to claim 1,2 or 3, it is characterized in that, clamp is provided with the chute (7) being connected and slide block is had radially position-limiting action with hanging block, hanging block can slide in chute, and hanging block direction beyond glide direction is carried out spacing by chute。
5. a kind of metal pipe material radial circulation load test fixture according to claim 4, it is characterised in that described chute is dove tail shape or T-slot shape。
6. a kind of metal pipe material radial circulation load test fixture according to claim 5, it is characterised in that have screwed hole on the sidewall of chute, connected in screwed hole so that hanging block is locked by lock-screw。
7. according to claims 1 to 3,5 or one of 6 described a kind of metal pipe material radial circulation load test fixtures, it is characterized in that, location structure (6) it is provided with between described clamp, between described hanging block or between described semi-cylindrical boss, in order to guide location, after making two clamp docking, two semi-cylindrical boss splits become cylinder。
8. a kind of metal pipe material radial circulation load test fixture according to claim 7, it is characterised in that described location structure is taper, trapezoidal, rectangle, circle or triangle。
9. according to claims 1 to 3,5,6 or one of 8 described a kind of metal pipe material radial circulation load test fixtures, it is characterized in that, described clamp is provided with connector (5), being driven to both sides by two clamps by the connector on two clamps, described connector is one-body molded with clamp or is connected on clamp by dismountable mode。
10. a kind of metal pipe material radial circulation load test fixture according to claim 9, it is characterised in that described connector is screw rod or corrugated tubing。
11. a kind of metal pipe material radial circulation load test fixture according to claim 9, it is characterized in that: described connector and described semi-cylindrical boss are located along the same line, the center line of the axis traverse semi-cylindrical boss of described connector, when making connector be pulled to both sides by clamp, the test tubing being socketed on semi-cylindrical boss is applied the pulling force of forward。
12. according to claims 1 to 3,5,6,8 or one of 10 described a kind of metal pipe material radial circulation load test fixtures, it is characterised in that two described clamps, hanging blocks are symmetrical structure, and are symmetrically installed。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520963373.9U CN205333440U (en) | 2015-11-26 | 2015-11-26 | Radial cyclic loading test fixture of metal tubular product |
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| CN201520963373.9U CN205333440U (en) | 2015-11-26 | 2015-11-26 | Radial cyclic loading test fixture of metal tubular product |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388061A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Testing clamp for toroidal fatigue of small-pipe-diameter metal pipe |
| CN109374239A (en) * | 2018-10-11 | 2019-02-22 | 湘潭大学 | A kind of measuring device of elastic cylinder split pin shear stiffness and stress |
| CN109900534A (en) * | 2019-02-27 | 2019-06-18 | 北京市理化分析测试中心 | A kind of preparation method of carbon fiber boundling sample preparation device and carbon fiber boundling |
| CN112414841A (en) * | 2020-10-13 | 2021-02-26 | 重庆工商大学 | Device and method for testing circumferential tensile strength of self-adaptive correcting pipe |
-
2015
- 2015-11-26 CN CN201520963373.9U patent/CN205333440U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388061A (en) * | 2015-11-26 | 2016-03-09 | 中国航空工业集团公司北京航空材料研究院 | Testing clamp for toroidal fatigue of small-pipe-diameter metal pipe |
| CN109374239A (en) * | 2018-10-11 | 2019-02-22 | 湘潭大学 | A kind of measuring device of elastic cylinder split pin shear stiffness and stress |
| CN109900534A (en) * | 2019-02-27 | 2019-06-18 | 北京市理化分析测试中心 | A kind of preparation method of carbon fiber boundling sample preparation device and carbon fiber boundling |
| CN109900534B (en) * | 2019-02-27 | 2023-09-01 | 北京市理化分析测试中心 | Carbon fiber bundling sample preparation device and carbon fiber bundling preparation method |
| CN112414841A (en) * | 2020-10-13 | 2021-02-26 | 重庆工商大学 | Device and method for testing circumferential tensile strength of self-adaptive correcting pipe |
| CN112414841B (en) * | 2020-10-13 | 2023-11-24 | 重庆工商大学 | Device and method for testing circumferential tensile strength of self-adaptive pilot pipe |
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