SU706740A1 - Gripper for securing tubular specimens at bend testing - Google Patents

Gripper for securing tubular specimens at bend testing

Info

Publication number
SU706740A1
SU706740A1 SU752152763A SU2152763A SU706740A1 SU 706740 A1 SU706740 A1 SU 706740A1 SU 752152763 A SU752152763 A SU 752152763A SU 2152763 A SU2152763 A SU 2152763A SU 706740 A1 SU706740 A1 SU 706740A1
Authority
SU
USSR - Soviet Union
Prior art keywords
sleeve
gripper
bend testing
tubular specimens
securing tubular
Prior art date
Application number
SU752152763A
Other languages
Russian (ru)
Inventor
Феликс Романович Куликов
Давид Лейбович Привен
Александр Саулович Пономарев
Юрий Георгиевич Кириллов
Original Assignee
Предприятие П/Я Р-6327
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 Предприятие П/Я Р-6327 filed Critical Предприятие П/Я Р-6327
Priority to SU752152763A priority Critical patent/SU706740A1/en
Application granted granted Critical
Publication of SU706740A1 publication Critical patent/SU706740A1/en

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  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Description

Изобретение относитс  к области испытатель ной техники, в частности к захватам дл  креплени  трубчатых образцов при испытани х на изгиб. Известен захват дл  креплени  трубчатых образцов при испытани х на изгиб, представл ющий собой цилиндрическую втулку, отверстие которой предназначено дл  размещени  образца 1. . Недостатком захвата  вл етс  низка  точность испытани  образца в захвате. Цель изобретени  - повыщение точности испытани  образцов со сварным щвом. Дл  зтого в предлагаемом захвате дл  креп лени  трубчатых образцов при испытани х на изгиб на внутренней поверхности втулки на рассто нии 1(0,3-0,6) р, где D - диаметр отверсти  втулки, от ее торца выполнена кольцева  проточка, а внутренн   часть втулки . в месте, предназначенном дп  защемлени  образца , выполнена со скруглением к торцу, ради RI кривизны которого выбран из соотнощени  (0,4-0,7)0, а центр кривизны находитс  на от торца втулки. рассто нии Кроме того, сопр жение скруглени  с торцом втулки может быть выполнено по радиусу R2 (0,01-0,025)0. На фиг. 1 показан предлагаемый захват; на фиг.2 - место закреплени  образца. Захват выполнен в виде фиксированной цилиндрической втулки 1, отверстие которой предназначено дл  размещени  образца 2 со сварным щвом 3. На внутренней поверхности втулки на рассто нии (0,3-0,6) О, где О - диаметр отверсти  втулки, от ее торца выполнена кольцева  проточка 4. Внутренн   часть 5 втулки в месте, предназначенном дп  защемлени  образца, выполнена со скруглением RI (0,4-0,7)0 к торцу, а центр О кривизны находилс  на рассто нии - от торца втулки. Сопр жение скруглени  с торцом втулки вьтполнено по радиусу Я (0,01-0,025) О. Радиусы RI и R2 выбираютс  из услови , что концентраци  напр жений, создаваема  локаш ным скруглением втулки, заведомо меньше концентрации напр жений, создаваемых сварным пгеом. Длина выбираетс  в зависимости от ширины сварного шва и околошовной зоны и зависит от вида сварки.The invention relates to the field of testing equipment, in particular to grips for fastening tubular specimens during bending tests. The gripper is known for fastening tubular specimens during bending tests, which is a cylindrical sleeve, the opening of which is intended to house specimen 1.. The disadvantage of capture is the low accuracy of the test specimen in the capture. The purpose of the invention is to increase the accuracy of testing specimens with welded grooves. For this reason, in the proposed grip for fastening tubular samples during bending tests on the inner surface of the sleeve at a distance of 1 (0.3-0.6) p, where D is the diameter of the sleeve opening, an annular groove is made from its end part of the sleeve. in the place intended for the pinching of the sample, it is made with a rounding off to the end face, for the sake of which the RI curvature is chosen from the ratio (0.4-0.7) 0, and the center of curvature is located from the end of the sleeve. distance In addition, mating rounding with the end of the sleeve can be performed along radius R2 (0.01-0.025) 0. FIG. 1 shows the proposed grip; Fig. 2 shows the fixing point of the sample. The grip is made in the form of a fixed cylindrical sleeve 1, the opening of which is intended to accommodate sample 2 with welded weld 3. On the inner surface of the sleeve at a distance of (0.3-0.6) O, where O is the diameter of the hole of the sleeve, from its end face an annular groove 4. The inner part 5 of the sleeve in the place intended for pinching the specimen is made with rounding RI (0.4-0.7) 0 to the end, and the center O of curvature is located at a distance from the end of the sleeve. Matching the rounding to the end of the sleeve is made along the radius I (0.01-0.025) O. The radii RI and R2 are chosen from the condition that the stress concentration created by the localized rounding of the sleeve is obviously less than the concentration of the stresses produced by the welded pge. The length is chosen depending on the width of the weld and the heat-affected zone and depends on the type of welding.

SU752152763A 1975-07-04 1975-07-04 Gripper for securing tubular specimens at bend testing SU706740A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU752152763A SU706740A1 (en) 1975-07-04 1975-07-04 Gripper for securing tubular specimens at bend testing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU752152763A SU706740A1 (en) 1975-07-04 1975-07-04 Gripper for securing tubular specimens at bend testing

Publications (1)

Publication Number Publication Date
SU706740A1 true SU706740A1 (en) 1979-12-30

Family

ID=20625489

Family Applications (1)

Application Number Title Priority Date Filing Date
SU752152763A SU706740A1 (en) 1975-07-04 1975-07-04 Gripper for securing tubular specimens at bend testing

Country Status (1)

Country Link
SU (1) SU706740A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110376065A (en) * 2019-08-09 2019-10-25 苏交科集团广东检测认证有限公司 A kind of dual-purpose experimental rig of section of jurisdiction bending resistance resistance to plucking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110376065A (en) * 2019-08-09 2019-10-25 苏交科集团广东检测认证有限公司 A kind of dual-purpose experimental rig of section of jurisdiction bending resistance resistance to plucking
CN110376065B (en) * 2019-08-09 2022-06-24 苏交科集团广东检测认证有限公司 Dual-purpose test device for bending resistance and pulling resistance of pipe piece

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