CN105388065A - Convenient-to-clamp pipe circumferential tensile test device - Google Patents
Convenient-to-clamp pipe circumferential tensile test device Download PDFInfo
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- CN105388065A CN105388065A CN201510844654.7A CN201510844654A CN105388065A CN 105388065 A CN105388065 A CN 105388065A CN 201510844654 A CN201510844654 A CN 201510844654A CN 105388065 A CN105388065 A CN 105388065A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a convenient-to-clamp pipe circumferential tensile test device. The convenient-to-clamp pipe circumferential tensile test device comprises two clamping bodies, wherein a hanging block is hung on each clamping body, one side of the hanging block is provided with a semi-cylindrical boss, the semi-cylindrical bosses are combined to form a cylinder after the two hanging blocks are connected, and the hanging blocks are slidably installed on the clamping bodies. The clamping bodies are provided with sliding grooves which are fit and connected with the hanging blocks and have an effect of radially limiting the sliding blocks, such that the hanging blocks can slide in the sliding grooves and can be limited in directions except a sliding direction. The sliding grooves are dovetail grooves or T-shaped grooves. The convenient-to-clamp pipe circumferential tensile test device is simple in structure, is portable and is compact, the number of parts is small, and the connection, assembling and replacement are facilitated. Especially due to a cantilever-type open system, pipe test pieces are very quick and easy to load and unload. The clamping bodies do not need to be replaced, the materials are saved and the cost is reduced. Since the hanging blocks are provided with semi-cylindrical bosses with different radiuses, circumferential mechanical property tensile tests of small-diameter metal pipes with diameter below 50mm can be realized.
Description
Technical field
The present invention relates to a kind of clamping tubing hoop tensile test device easily, belong to pipe performance testing apparatus field.
Background technology
Metal pipe material is a kind of important form of raw material metal, directly or after secondary processing is widely used in equipment manufacturing.In processing, the assembling processes such as bending, the enlarging of tubing and flattening, high requirement is proposed to the mechanical property of tubing.Conveying liquids and gases mainly born by tubing, and transmit the effect of power, very large pressure can be born in inside, comprises the load of variation, and the impact of quality on safety in production of its mechanical property is significant.The mechanical property of therefore testing tubing evaluates the important evidence of tubing mechanical behavior and equipment de-sign.
Tubing is under processing and service condition, and plastic deformation ability and reliability service depend primarily on the mechanical property of hoop.Due to processed impact, tubing axis and hoop mechanical property there are differences.For TA18 titanium alloy hydraulic pressure tubing, also by special technological measure, produce the texture that tube wall strengthens, make tubing have significant Anisotropy.And the mechanical property of tubing mainly adopts the evaluation of tubing axial tension test at present, axial tension national standard is GB/T228 metal material tensile testing at ambient temperature, but axial mechanical property is difficult to use in evaluation and design tubing.By tubing size constrained, the test and comparison difficulty of hoop mechanical property, without standard and unified method, more not to the regulation of fixture, based on designed, designed.
For the main simple beam structure fixture adopting the two ends of middle lock pin rod to support of heavy caliber pipe hoop stretching.Northwestern Polytechnical University proposes a kind of clamp for testing annular tensile property of tubular product (a kind of clamp for testing annular tensile property of tubular product, public announcement of a patent application CN102445384A), the hoop that configuration many covers grommet can meet diameter 60-150mm tubing stretches, but handling sample is complicated, time-consuming, sleeve clearances is many, affects measuring accuracy.For pipe with small pipe diameter tubing, Yan Meng etc. design pin rod (the small size tubing hoop stretching clamp of the fan-shaped end face of pin joint, license notification number CN202693413U), insertion pipe ring stretches, tubing for often kind of caliber all needs clamp and pin rod one to one, experimentation cost increases, complex operation.Fan-shaped cambered surface and tubular product sample contact area little, larger addition bend load can be caused to sample during extension test, hoop extension test data precision is declined.Xue Fei etc. are a kind of hoop stretching clamp (a kind of fixture for toroidal tensile test of thin pipe for pipe with small pipe diameter thin-wall pipes devises, license notification number CN201681020U), described fixture is also the corresponding special clamp of often kind of tubing and right cylinder, versatility is not strong, upper lower clamp is oppositely arranged, form closed system, be not easy to sample is installed.
Summary of the invention
The object of the present invention is to provide a kind of hoop tensile mechanical properties test fixture loading and unloading the small-caliber metal tubes material (external diameter is no more than 50mm) of convenient, highly versatile.
A kind of clamping tubing hoop tensile test device easily, comprise two clamps, each clamp is mounted with hanging block, the side of hanging block is provided with semi-cylindrical boss, make the split of semi-cylindrical boss become a right cylinder after two hanging block docking, hanging block is slidably mounted on clamp.
Clamp is provided with the chute be connected with hanging block, and chute has the chute of radial position-limiting action to slide block, hanging block can be slided in chute and carry out spacing to the direction of hanging block beyond glide direction.
Preferably, described chute is dove tail shape or T-slot shape.
Further preferred, the sidewall of chute has threaded hole, is arranged in threaded hole by lock-screw and hanging block is locked.
Between described clamp, between described hanging block or between described semi-cylindrical boss, be provided with location structure, in order to guide location, after making two clamp docking, the split of two semi-cylindrical boss becomes right cylinder.
Described location structure can be taper, trapezoidal, rectangle, circle, triangle or polymorphic structure.
Described clamp is provided with web member, is driven by two clamps by the web member on two clamps to both sides, described web member and clamp is one-body molded or be connected on clamp by dismountable mode.
Preferred further, described web member is screw rod or threaded line pipe.
Described web member and described semi-cylindrical boss are located along the same line, and the axis of described web member, through the center line of semi-cylindrical boss, when clamp is pulled to both sides by web member, applies the pulling force of forward to the test tubing be socketed on semi-cylindrical boss.
Further preferred, two described clamps, hanging blocks are symmetrical structure, and symmetrical installation.
The present invention adopts and is symmetrical arranged and identical 2 clamps of shape, and can carry out plugging 2 hanging blocks be connected with clamp.There is the screw rod that can be connected with testing machine clamp upper end, and clamp is notch cuttype rectangular parallelepiped, and at its lower end processing chute, chute can be dovetail groove or T-slot.Hanging block is also adopt the shape matched with chute, can insert from the chute of clamp and extract.The semi-cylindrical boss of hanging block front end and test pipe internal diameter coincide, and carry out hoop extension test in the semi-cylindrical boss making test tubing can be inserted in upper and lower hanging block.
According to the serial hanging block of the internal diameter processing configuration various outer diameter boss of tensile sample, round platform diameter from 5mm to 50mm, and need not change clamp.
Upper lower clamp side is arranged, and in open system, need not pull down clamp during sample handling, stretched operation is fast easy.
Structure of the present invention is simple, light, compact, and parts are few, and connect, assemble, change conveniently, especially cantilevered opens wide system, and handling tubular product sample is very quick, easy.Clamp need not be changed, and saves material and cost.The hanging block of the semi-cylindrical boss of configuration different radii, can realize the hoop mechanics Properties Tensile test of the small-caliber metal tubes material of below diameter 50mm.
Accompanying drawing explanation
According to drawings and embodiments the present invention is described in further detail below.
Fig. 1 is the front view of the tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Fig. 2 is the side view of the tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Fig. 3 is the decomposition texture front view of the tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Fig. 4 is the decomposition texture side view of the tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Fig. 5 is the front view of the another kind of structure of tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Fig. 6 is the front view of another structure of tubing hoop tensile test device easily of a kind of clamping described in the embodiment of the present invention;
Wherein: 1-clamp, 2-hanging block, 3-semi-cylindrical boss, 4-chute, 5-web member, 6-threaded hole.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment one
As Figure 1-4, in the present embodiment, described clamping is tubing hoop tensile test device easily, comprise two clamps 1, each clamp 1 is mounted with hanging block 2, the side of hanging block 2 is provided with after semi-cylindrical boss 3, two hanging blocks 2 dock and makes the split of semi-cylindrical boss become a right cylinder, and hanging block 2 is slidably mounted on clamp 1.
Clamp 1 is provided with the chute be connected with hanging block 2, and chute has the chute 11 of radial position-limiting action to slide block, makes hanging block 2 can slide in chute 11 and carry out spacing to the direction of hanging block beyond glide direction.
Preferably, described chute 4 is dove tail shape.
In implementation process, chute 4 also can adopt T-slot shape as shown in Figure 6.
Further preferred, as shown in Figure 6, the sidewall of chute 4 has threaded hole 6, be arranged in threaded hole 6 by lock-screw and hanging block is locked.
Between described clamp 1, between described hanging block 2 or between described semi-cylindrical boss 3, be provided with location structure, in order to guide location, after making two clamp docking, the split of two semi-cylindrical boss becomes right cylinder.
As shown in Figure 5, adopt in the present embodiment and be provided with location structure between two semi-cylindrical boss 3, and location structure adopts trapezoidal; But those skilled in the art are in implementation process, also described location structure can be set to taper, rectangle, circle, triangle or polymorphic structure.
Described clamp 1 is provided with web member 5, is driven by two clamps by the web member 5 on two clamps 1 to both sides, described web member and clamp is one-body molded or be connected on clamp by dismountable mode.
Preferred further, described web member 5 is screw rod, and described web member 13, in implementation process, also can be set to threaded line pipe by those skilled in the art.
Described web member 5 is located along the same line with described semi-cylindrical boss 2, the axis of described web member 5 passes the center line of semi-cylindrical boss 2, when clamp 1 is pulled to both sides by web member 5, the test tubing be socketed on semi-cylindrical boss 2 is applied to the pulling force of forward.
Further preferred, two described clamps 1, hanging blocks 2 are symmetrical structure, and symmetrical installation.
The tubing 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 4mm.
Clamp material is Cr12MoV, and Q-tempering thermal treatment, hardness reaches HR40 ~ 55.Upper and lower clamp is connected with testing machine respectively by screw rod, hanging block is inserted the chute of clamp lower end, and the diameter of outstanding half round platform is 13mm, upper lower clamp is positioned at side, and fine setting testing machine chuck, makes the semi-cylindrical boss in lower clamp align and close up, become cylinder, sample is inserted in round platform hanging block.Extensometer is fixed on upper and lower two semi-cylindrical boss simultaneously.Start testing machine, carry out tension test to tubular product sample, velocity of displacement meets the regulation of standard GB/T/T228 metal material tensile testing at ambient temperature, record tensile force and extensometer deflection, can obtain tubing hoop tensile mechanical properties by calculating.
Embodiment two
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 thermal treatment, hardness reaches HR40 ~ 55.Upper lower clamp is connected with testing machine respectively by screw rod, hanging block is inserted the chute of clamp lower end, and the diameter of semi-cylindrical boss is 16mm, upper lower clamp is positioned at side, and fine setting testing machine chuck, makes the semi-cylindrical boss in lower clamp align and 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.Start testing machine, carry out tension test to tubular product sample, velocity of displacement meets the regulation of standard GB/T/T228 metal material tensile testing at ambient temperature, record tensile force and extensometer deflection, can obtain tubing hoop tensile mechanical properties by calculating.
Embodiment three
The tubing of the present embodiment test is the zirconium alloy tube of Φ 9.53 × 0.64mm (pipe external diameter × wall thickness), and the length of tubing is 3mm.Clamp material is 4Cr5MoSiV, and Q-tempering thermal treatment, hardness reaches HR40 ~ 55.Upper lower clamp is connected with testing machine respectively by screw rod, hanging block is inserted the chute of clamp lower end, and the diameter of semi-cylindrical boss is 7mm, upper lower clamp is positioned at side, and fine setting testing machine chuck, makes the semi-cylindrical boss in lower clamp align and 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.Start testing machine, carry out tension test to tubular product sample, velocity of displacement meets the regulation of standard GB/T/T228 metal material tensile testing at ambient temperature, record tensile force and extensometer deflection, can obtain tubing hoop tensile mechanical properties by calculating.
Technology contents of the present invention and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement; therefore; scope should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present invention and modification should be comprised, and contained by the claims in the present invention.
Claims (10)
1. clamping tubing hoop tensile test device easily, described test unit comprises two clamps (1), it is characterized in that, each clamp is mounted with hanging block (2), the side of hanging block is provided with semi-cylindrical boss (3), make the split of semi-cylindrical boss become a right cylinder after two hanging block docking, hanging block is slidably mounted on clamp.
2. a kind of clamping tubing hoop tensile test device easily as claimed in claim 1, it is characterized in that, clamp is provided with the chute (4) be connected with hanging block, and chute has radial position-limiting action to slide block.
3. a kind of clamping tubing hoop tensile test device easily as claimed in claim 2, it is characterized in that, described chute is dove tail shape or T-slot shape.
4. a kind of clamping tubing hoop tensile test device easily as claimed in claim 3, be is characterized in that, the sidewall of chute has threaded hole (6), be arranged in threaded hole lock hanging block by lock-screw.
5. a kind of clamping tubing hoop tensile test device easily as described in as arbitrary in Claims 1-4, it is characterized in that, location structure 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, the split of two semi-cylindrical boss becomes right cylinder.
6. a kind of clamping tubing hoop tensile test device easily as claimed in claim 5, it is characterized in that, described location structure is taper, trapezoidal, rectangle, circle, triangle or polymorphic structure.
7. a kind of clamping tubing hoop tensile test device easily as described in as arbitrary in claim 1 to 6, it is characterized in that, described clamp is provided with web member (5), by the web member on two clamps, two clamps are driven to both sides, described web member and clamp is one-body molded or be connected on clamp by dismountable mode.
8. a kind of clamping tubing hoop tensile test device easily as claimed in claim 7, it is characterized in that, described web member is screw rod or threaded line pipe.
9. a kind of clamping tubing hoop tensile test device easily as claimed in claim 8, it is characterized in that, described web member and described semi-cylindrical boss are located along the same line, the axis of described web member passes the center line of semi-cylindrical boss, when clamp is pulled to both sides by web member, the test tubing be socketed on semi-cylindrical boss is applied to the pulling force of forward.
10. a kind of clamping tubing hoop tensile test device easily as described in as arbitrary in claim 1 to 9, it is characterized in that, two described clamps, hanging blocks are symmetrical structure, and symmetrically install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844654.7A CN105388065A (en) | 2015-11-26 | 2015-11-26 | Convenient-to-clamp pipe circumferential tensile test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844654.7A CN105388065A (en) | 2015-11-26 | 2015-11-26 | Convenient-to-clamp pipe circumferential tensile test device |
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| Publication Number | Publication Date |
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| CN105388065A true CN105388065A (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510844654.7A Pending CN105388065A (en) | 2015-11-26 | 2015-11-26 | Convenient-to-clamp pipe circumferential tensile test device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928761A (en) * | 2016-06-28 | 2016-09-07 | 华南理工大学 | Uniaxial tensile test measurement method for water gel material based on test piece in shape of Chinese character HUI |
| CN108318334A (en) * | 2018-03-08 | 2018-07-24 | 山西省机电设计研究院 | Universal hydraulic testing of materials machine clamp |
| CN108426788A (en) * | 2018-04-11 | 2018-08-21 | 四川大学 | Rock direct shearing test test specimen, piece fixture and its shearing test method |
| CN109540658A (en) * | 2018-12-18 | 2019-03-29 | 中核北方核燃料元件有限公司 | A kind of composite material of silicon carbide pipe ring is to stretching tool |
| CN112326417A (en) * | 2020-12-02 | 2021-02-05 | 中国航发南方工业有限公司 | Special clamp for hard and brittle material tensile experiment |
| CN113092257A (en) * | 2021-04-13 | 2021-07-09 | 西北有色金属研究院 | Universal test device and test method for circumferential tension of metal pipe |
| CN113138121A (en) * | 2020-01-17 | 2021-07-20 | 中核北方核燃料元件有限公司 | Tensile detection device of carborundum pipe hoop |
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| CN205317574U (en) * | 2015-11-26 | 2016-06-15 | 中国航空工业集团公司北京航空材料研究院 | Tensile test device of tubular product hoop |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928761A (en) * | 2016-06-28 | 2016-09-07 | 华南理工大学 | Uniaxial tensile test measurement method for water gel material based on test piece in shape of Chinese character HUI |
| CN105928761B (en) * | 2016-06-28 | 2019-05-14 | 华南理工大学 | Hydrogel material uniaxial tensile test measurement method based on hollow test specimen |
| CN108318334A (en) * | 2018-03-08 | 2018-07-24 | 山西省机电设计研究院 | Universal hydraulic testing of materials machine clamp |
| CN108426788A (en) * | 2018-04-11 | 2018-08-21 | 四川大学 | Rock direct shearing test test specimen, piece fixture and its shearing test method |
| CN108426788B (en) * | 2018-04-11 | 2024-06-04 | 四川大学 | Rock direct shear experiment test piece, test piece clamp and shear test method thereof |
| CN109540658A (en) * | 2018-12-18 | 2019-03-29 | 中核北方核燃料元件有限公司 | A kind of composite material of silicon carbide pipe ring is to stretching tool |
| CN113138121A (en) * | 2020-01-17 | 2021-07-20 | 中核北方核燃料元件有限公司 | Tensile detection device of carborundum pipe hoop |
| CN112326417A (en) * | 2020-12-02 | 2021-02-05 | 中国航发南方工业有限公司 | Special clamp for hard and brittle material tensile experiment |
| CN113092257A (en) * | 2021-04-13 | 2021-07-09 | 西北有色金属研究院 | Universal test device and test method for circumferential tension of metal pipe |
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Application publication date: 20160309 |
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