CN102156067A - Clamping device used in tensile test - Google Patents

Clamping device used in tensile test Download PDF

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Publication number
CN102156067A
CN102156067A CN2011100480626A CN201110048062A CN102156067A CN 102156067 A CN102156067 A CN 102156067A CN 2011100480626 A CN2011100480626 A CN 2011100480626A CN 201110048062 A CN201110048062 A CN 201110048062A CN 102156067 A CN102156067 A CN 102156067A
Authority
CN
China
Prior art keywords
clamping device
lobe shape
sleeve
petal
test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011100480626A
Other languages
Chinese (zh)
Inventor
施岱艳
赵华莱
林普
杜毅
姜放
杜磊
李林辉
鲜宁
殷名学
曹晓燕
李天雷
吴知谦
上官昌淮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Petroleum Corp Engineering Design Co Ltd
Original Assignee
China National Petroleum Corp Engineering Design Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China National Petroleum Corp Engineering Design Co Ltd filed Critical China National Petroleum Corp Engineering Design Co Ltd
Priority to CN2011100480626A priority Critical patent/CN102156067A/en
Publication of CN102156067A publication Critical patent/CN102156067A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a clamping device used in tensile test, comprising a tensile core rod with external threads and an abutting conical surface, a pressing cap matched with the tensile core rod by threads, and a petal-shaped internal sleeve and a petal-shaped external sleeve that are contacted with the internal surface and the external surface of the test pipe material respectively; the internal conical surface of the petal-shaped internal sleeve is matched with the abutting conical surface of the tensile core rod; the petal-shaped external sleeve is externally provided with a rigid sleeve; and a fastening bolt is screwed down by a thread hole arranged in the rigid sleeve so as to contact with the petal-shaped external sleeve. The external surface of the petal-shaped internal sleeve is provided with toothed or corrugated or hooked or granular bulges. The clamping device has the active effects of having compact structure, being operated simply and conveniently, being applicable to the pipe materials of various diameters and wall thickness, and meeting the requirements of the axial tensile test of the pipe material which needs to be loaded by a higher axial load.

Description

The tension test clamping device
Technical field
The present invention relates to a kind of tension test clamping device, especially relate to a kind of tubing homogeneous tube axial tension test clamping device.
Background technology
Tubing axial tension test clamping device is used for the laboratory and carries out tubing axial tension performance measurement test, and it is fixed on the cupping machine when using, and function is that test tubing two ends are clamped, and by cupping machine test tubing is loaded axial load.
Mostly existing tubing axial tension test clamping device is to carry out at the flat sample that takes off on solid bar-shaped sample, the tubing and arc sample.Yet sampling is carried out tensile property and is measured and might not conform to the actual tensile property of tubing homogeneous tube on tubing, even difference is very big.In addition, caliber, wall thickness that present existing homogeneous tube axial tension test clamping device is suitable for are limited, the anchor clamps of one cover specification only are applicable to the tubing of specifications and models, and load the tubing of higher axial load for needs, the situation that present clamping device skids easily, becomes flexible even can not test can not meet the demands.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the invention provides a kind of tension test clamping device, compact conformation, easy and simple to handle, be applicable to the tubing of multiple diameter, wall thickness, and the requirement of the tubing axial tension test of the higher axial load of loading of satisfying the demand.
The technical solution adopted for the present invention to solve the technical problems is: a kind of tension test clamping device, comprise the stretching core bar that has external thread and pretension circular conical surface, pressure cap with stretching core bar threaded engagement, and overlap and lobe shape overcoat respectively with in test internal surface of pipe and the contacted lobe shape of outside surface, the internal conical surface of cover matches with the pretension circular conical surface of described stretching core bar in the described lobe shape; Be outside equipped with the rigidity overcoat at described lobe shape overcoat, fastening bolt puts the threaded hole precession of setting outward by rigidity, contacts with lobe shape overcoat.
Described lobe shape lining the outer surface of has zigzag, corrugated, hook-shaped or graininess projection; Outside surface at described lobe shape overcoat is provided with counterbore; The load reservation hole is set on described pressure cap; In described pressure cap and lobe shape, be provided with pad between the cover.
Compared with prior art, good effect of the present invention is: by putting outside rigidity threaded hole is set, adopt fastening bolt to lobe shape overcoat pressing mode to reach pretightning force, adopt this structure to make and test the fastening easy and simple to handle of pipe outer surface, this in addition version makes the rigidity overcoat scope of application increase, in corresponding range of size applicable to the test tubing of various outer diameter, needn't just process the rigidity overcoat of different size again at the test tubing of various outer diameter, save the use of material and energy consumption.
In addition, be processed into the surface of shapes such as band saw profile of tooth, corrugated, hamulus or graininess projection by the outside surface that will overlap in the lobe shape, to increase itself and the friction force of testing internal surface of pipe, the situation that such structure has avoided present clamping device to skid easily, become flexible even can not test, load the tubing of higher axial load especially for needs, can carry out the loading of pretightning force between clamping device and the test tubing well, and will test tubing firmly, effectively at duration of test and clamp.The design of package unit is tested applicable to the axial tension of tubing homogeneous tube, and is applicable to the tubing axial tension test of multiple diameter, wall thickness.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a structural representation of the present invention.
Embodiment
A kind of tension test clamping device as shown in Figure 1, comprises cover 4 in stretching core bar 1, pressure cap 2, pad 3, the lobe shape, lobe shape overcoat 5, rigidity overcoat 6, fastening bolt 7, test tubing 8 etc., wherein:
Stretching core bar 1 has external thread and pretension circular conical surface, and the one end is fixed on the cupping machine; Pressure cap 2 and stretching core bar 1 threaded engagement are provided with the load reservation hole on pressure cap 2, effect is to make things convenient for the precession of pressure cap 2; Pressure cap 2 moves by cover 4 in the pad 3 promotion lobe shapes in the process of precession, and cover 4 internal conical surfaces cooperate with the circular conical surface of stretching core bar 1 in the lobe shape, overlaps 4 outside surfaces in the lobe shape and contacts with test tubing 8 inside surfaces.Because the outside surface of cover 4 is the position of mainly bearing pulling force in drawing process with the contacted position of inside surface of test tubing 8 in the lobe shape, therefore, in order to increase the friction force of overlapping in the lobe shape between 4 outside surfaces and test tubing 8 inside surfaces, so that this device can load bigger pulling force to test tubing in process of the test, cover 4 outside surfaces in the lobe shape can be increased itself and the friction force of testing internal surface of pipe by special processing or special processing modes such as (as the surfaces of being processed into band saw profile of tooth, corrugated, hamulus or graininess projection).Rigidity overcoat 6 upper edges circumferentially are provided with threaded hole, apply fastening force by fastening bolt 7 to lobe shape overcoat 5, and lobe shape overcoat 5 inside surfaces contact with test tubing 8 outside surfaces, help to test that tubing is indeformable does not pop; Lobe shape overcoat 5 outside surfaces are provided with counterbore, are convenient to the location and the loading of fastening bolt 7.
Stretching core bar 1 and 6 designs of rigidity overcoat have a plurality of models, and the size of different model has certain variation, and the stretching core bar 1 of same model or rigidity overcoat 6 are applicable to the test tubing of the multiple external diameter in the corresponding size interval, wall thickness.
The concrete operations mode is as follows:
As shown in Figure 1, when needs carry out tension test, need use two cover tension test clamping devices (hereinafter to be referred as anchor clamps), the mode of operation unanimity of two sleeve clamps.Test tubing 8 one ends are injected in the 4 combination backs of cover in stretching core bar 1 and the lobe shape, by load reservation hole precession pressure cap 2, under the promotion of pressure cap 2, promoting to overlap in the lobe shape 4 by pad 3 moves, make the circular conical surface move toward one another of interior cover 4 of lobe shape and stretching core bar 1, cover 4 outside surfaces closely combine with the inside surface generation pretightning force of test tubing 8 in the lobe shape thereby make, after pressure cap 2 precessions put in place, rigidity overcoat 6 and lobe shape overcoat 5 are placed the outside surface of testing tubing 8 corresponding ends, use fastening bolt 7 to pressurize to lobe shape overcoat 5, the outside surface generation pretightning force of lobe shape overcoat 5 and test tubing 8 is closely combined by the threaded hole precession of rigidity overcoat 6.After the charger at test tubing 8 two ends is adjusted respectively, two stretching core bars 1 are individually fixed on the cupping machine load, just can measure the axial tension mechanics performance of whole tubing as requested.

Claims (5)

1. tension test clamping device, it is characterized in that: comprise the stretching core bar that has external thread and pretension circular conical surface, pressure cap with stretching core bar threaded engagement, and overlap and lobe shape overcoat respectively with in test internal surface of pipe and the contacted lobe shape of outside surface, the internal conical surface of cover matches with the pretension circular conical surface of described stretching core bar in the described lobe shape; Be outside equipped with the rigidity overcoat at described lobe shape overcoat, fastening bolt puts the threaded hole precession of setting outward by rigidity, contacts with lobe shape overcoat.
2. tension test clamping device according to claim 1 is characterized in that: described lobe shape lining the outer surface of has zigzag, corrugated, hook-shaped or graininess projection.
3. tension test clamping device according to claim 1 is characterized in that: the outside surface at described lobe shape overcoat is provided with counterbore.
4. tension test clamping device according to claim 1 is characterized in that: the load reservation hole is set on described pressure cap.
5. tension test clamping device according to claim 1 is characterized in that: be provided with pad between the cover in described pressure cap and lobe shape.
CN2011100480626A 2011-03-01 2011-03-01 Clamping device used in tensile test Pending CN102156067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100480626A CN102156067A (en) 2011-03-01 2011-03-01 Clamping device used in tensile test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100480626A CN102156067A (en) 2011-03-01 2011-03-01 Clamping device used in tensile test

Publications (1)

Publication Number Publication Date
CN102156067A true CN102156067A (en) 2011-08-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
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CN (1) CN102156067A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604690A (en) * 2013-11-26 2014-02-26 武钢集团昆明钢铁股份有限公司 Testing core rod and detection method for detecting mechanical property of connection sleeve
CN103926144A (en) * 2014-05-08 2014-07-16 韦智生 Tensile testing machine fixture
CN103954498A (en) * 2014-05-23 2014-07-30 天润曲轴股份有限公司 Clamping device for bent axle fatigue test
CN105179691A (en) * 2015-09-24 2015-12-23 哈尔滨工业大学 Clamping and sealing clamp for end of pipe
CN105510123A (en) * 2016-01-28 2016-04-20 中国原子能科学研究院 Clamp for thin-wall tube
CN105571939A (en) * 2015-12-18 2016-05-11 中国人民解放军第五七一九工厂 High-temperature stretching test clamp for integral pipe with self-locking inner wall
CN106003680A (en) * 2016-06-23 2016-10-12 苏州市盛百威包装设备有限公司 Packing two-way stretching clamping fixture for plastic pipe
CN106115014A (en) * 2016-06-23 2016-11-16 苏州市盛百威包装设备有限公司 A kind of packaging tubing two-way gear drive stretching clamp
CN107655508A (en) * 2017-10-28 2018-02-02 庄明忠 A kind of tubing detection fixed equipment of the realm of building construction
CN111854593A (en) * 2020-06-22 2020-10-30 同济大学 Digital sensor based on multistage deformation surmounts early warning

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU533849A1 (en) * 1974-01-04 1976-10-30 Предприятие П/Я А-1857 Capture to machine for mechanical testing of thin-walled tubular specimens
JPS5497083A (en) * 1978-01-17 1979-07-31 Hitachi Ltd Clamp device for tube tensile test
CN1262436A (en) * 1999-01-27 2000-08-09 北京理工大学 Fixture for dynamic stretching test of fibre reinforced compound material
CN2676179Y (en) * 2004-02-16 2005-02-02 申雅密封件有限公司 Painted steel fixture for automobile weather seal insertion and withdraw force testing device
CN201993272U (en) * 2011-03-01 2011-09-28 中国石油集团工程设计有限责任公司 Clamping device for tensile test

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU533849A1 (en) * 1974-01-04 1976-10-30 Предприятие П/Я А-1857 Capture to machine for mechanical testing of thin-walled tubular specimens
JPS5497083A (en) * 1978-01-17 1979-07-31 Hitachi Ltd Clamp device for tube tensile test
CN1262436A (en) * 1999-01-27 2000-08-09 北京理工大学 Fixture for dynamic stretching test of fibre reinforced compound material
CN2676179Y (en) * 2004-02-16 2005-02-02 申雅密封件有限公司 Painted steel fixture for automobile weather seal insertion and withdraw force testing device
CN201993272U (en) * 2011-03-01 2011-09-28 中国石油集团工程设计有限责任公司 Clamping device for tensile test

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李毅然等: "高温真空拉伸气动夹具", 《试验技术与试验机》 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604690A (en) * 2013-11-26 2014-02-26 武钢集团昆明钢铁股份有限公司 Testing core rod and detection method for detecting mechanical property of connection sleeve
CN103926144B (en) * 2014-05-08 2016-08-17 韦智生 A kind of clamp of stretching tester
CN103926144A (en) * 2014-05-08 2014-07-16 韦智生 Tensile testing machine fixture
CN103954498A (en) * 2014-05-23 2014-07-30 天润曲轴股份有限公司 Clamping device for bent axle fatigue test
CN105179691A (en) * 2015-09-24 2015-12-23 哈尔滨工业大学 Clamping and sealing clamp for end of pipe
CN105179691B (en) * 2015-09-24 2017-03-29 哈尔滨工业大学 A kind of pipe end grip seal fixture
CN105571939A (en) * 2015-12-18 2016-05-11 中国人民解放军第五七一九工厂 High-temperature stretching test clamp for integral pipe with self-locking inner wall
CN105510123A (en) * 2016-01-28 2016-04-20 中国原子能科学研究院 Clamp for thin-wall tube
CN106003680A (en) * 2016-06-23 2016-10-12 苏州市盛百威包装设备有限公司 Packing two-way stretching clamping fixture for plastic pipe
CN106115014A (en) * 2016-06-23 2016-11-16 苏州市盛百威包装设备有限公司 A kind of packaging tubing two-way gear drive stretching clamp
CN107655508A (en) * 2017-10-28 2018-02-02 庄明忠 A kind of tubing detection fixed equipment of the realm of building construction
CN107655508B (en) * 2017-10-28 2019-10-18 倡创(上海)咨询管理事务所 Fixed equipment is used in a kind of tubing detection of the realm of building construction
CN111854593A (en) * 2020-06-22 2020-10-30 同济大学 Digital sensor based on multistage deformation surmounts early warning

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Application publication date: 20110817