SU926560A1

SU926560A1 - Device for specimen strength testing

Info

Publication number: SU926560A1
Application number: SU802931768A
Authority: SU
Inventors: Евгений Сергеевич Андрианов; Светлана Федоровна Булачева; Александр Викторович Качалов; Александр Михайлович Хомяков
Original assignee: Научно-исследовательский институт резиновых и латексных изделий
Priority date: 1980-05-28
Filing date: 1980-05-28
Publication date: 1982-05-07

Description

Изобретение относится к испытательной технике, а именно к устройствам для испытания образцов на растяжение, внецетренное растяжение и чистый изгиб.The invention relates to testing equipment, and in particular to devices for testing specimens for tensile, eccentric tensile and pure bending.

Известно устройство для испытания образцов на прочность, содержащее основание, нагружающий механизм, два захватных приспособления, одно из которых выполнено в виде каретки, установленной на основании, и захвата, установленного на каретке с возможностью поворота в плоскости, перпендикулярной плоскости основания. (1).A device for testing samples for strength, containing a base, a loading mechanism, two gripping devices, one of which is made in the form of a carriage mounted on the base, and a gripper mounted on the carriage with the possibility of rotation in a plane perpendicular to the plane of the base. (1).

Недостаток устройства заключается в том, что оно не позволяет проводить испытания на внецентренное растяжение и изгиб.The disadvantage of this device is that it does not allow testing for eccentric tension and bending.

Цель изобретения - расширение функциональных возможностей путем обеспечения испытания образца на внецентрен ное растяжение и изгиб.The purpose of the invention is the expansion of functionality by providing testing of the sample for eccentric tension and bending.

Указанная цель достигается тем, что второе захватное приспособление выполнено .в виде шарнирно связанной с нагружающим механизмом подвески, втулки с направляющими пазами, шарнирно связанной с подвеской, и захвата, установленного на втулке с воз⁵ можностью перемещения в направляющих пазах, а захват первого захватно¹· го приспособления имеет фиксатор для установки его в заданном положении.This goal is achieved by the fact that the second gripping device is made in the form of a suspension pivotally connected to the loading mechanism, a sleeve with guide grooves pivotally connected to the suspension, and a gripper mounted on the sleeve with the possibility of movement in the guide grooves ⁵ , and the first gripper ¹ · The fixture has a latch for installing it in a predetermined position.

На фиг. 1 изображено предлагаемое ¹⁰ устройство, общий вид; на фиг. 2 сечение А-А на фиг. 1; на фиг. 3 устройство при испытании образца на внецентренное растяжение; на фиг. 4 - то же, при испытании образца на изгиб.In FIG. 1 shows the proposed ¹⁰ device, General view; in FIG. 2, section AA in FIG. 1; in FIG. 3 device when testing the sample for eccentric tension; in FIG. 4 - the same when testing the sample for bending.

Устройство содержит основание 1, нагружающий механизм (не показан) и два захватных приспособления, одно из которых выполнено в виде каретки 2, установленной на основании 1 посредст вом винта 3, и захвата 4, закрепленного на каретке 2 с возможностью пово рота в плоскости, перпендикулярнойThe device comprises a base 1, a loading mechanism (not shown) and two gripping devices, one of which is made in the form of a carriage 2 mounted on the base 1 using a screw 3, and a gripper 4 mounted on the carriage 2 with the possibility of rotation in a plane perpendicular

926560 . 4 плоскости основания 1. Второе захватное приспособление выполнено в виде шарнирно связанной с нагружающим механизмом подвески 5, втулки 6 с направляющими пазами 7 и 8, шарнирно _sсвязанной с подвеской 5, и захвата 9, установленного на втулке 6 с возможностью перемещения в направляющих пазах 7 и 8. Захват 4 устанавливается в заданном положении с помощью фикса- to тора 10. Перемещение захвата 9 осуществляется посредством винта 11.926560. 4 the base plane 1. The second gripper is designed as a pivotally connected with the suspension-loaded mechanism 5, the sleeve 6 with guide grooves 7 and 8, _s is pivotally connected with the suspension 5 and the lifter 9 mounted on the sleeve 6 is movable in the guiding grooves 7 and 8. The gripper 4 is set in a predetermined position using the latch 10. The gripper 9 is moved by means of a screw 11.

Устройство работает следующим образом.The device operates as follows.

При испытании образца 12 на растя- is )кение его устанавливают в захваты 4 и 9_;таким образом, чтобы растягивающее усилие от нагружающего механизма совпадало с осью симметрии образца. Прикладывают растягивающее усилие к подвеске 5 и определяют прочностные характеристики испытуемого образца. .When testing sample 12 for tension, it) is installed in grips 4 and 9 _; so that the tensile force from the loading mechanism coincides with the axis of symmetry of the sample. Apply a tensile force to the suspension 5 and determine the strength characteristics of the test sample. .

При испытании образца 12 на внецентренное растяжение захват 4 перемещают по направляющим пазам 7 и 8, втулки 6 на заданное расстояние, прикладывают растягивающее усилие, и в образце возникает напряженное состояние, вызванное внецентренным растяжением.When the sample 12 is tested for eccentric tension, the gripper 4 is moved along the guide grooves 7 and 8, the bushings 6 at a predetermined distance, a tensile force is applied, and a stress state arises in the sample caused by eccentric tension.

При испытании образца 12 на изгиб захват 4 поворачивают в плоскости, перпендикулярной плоскости основания, на угол 90 относительно подвески 5 • и опускают его до одного уровня с захватом 9. Захват 9 поворачивают на угол 90* в плоскости, перпендикулярной плоскости основания, и фиксируют его в этом положении с помощью фиксатора 10. Образец устанавливают в захваты 4 и 9, прикладывают усилие к подвеске 5, при этом в образце возникает напряженное состояние изгиба.When testing specimen 12 for bending, the gripper 4 is turned in the plane perpendicular to the base plane by an angle of 90 relative to the suspension 5 • and lowered to the same level with the gripper 9. The gripper 9 is turned through an angle of 90 * in the plane perpendicular to the plane of the base and fixed in this position using the latch 10. The sample is installed in the grippers 4 and 9, a force is applied to the suspension 5, and a bending stress state arises in the sample.

Предлагаемая конструкция устройства обеспечивает испытания образцов на растяжение, внецентренное растяжение и чистый изгиб, поскольку захватные приспособления имеют возможность изменения своего положения относительно друг друга в зависимости от вида испытания.The proposed device design provides tensile testing of samples, eccentric tension and clean bending, since the grippers have the ability to change their position relative to each other depending on the type of test.

Claims

The invention relates to a testing apparatus, namely, devices for testing samples for stretching, non-centrifugal stretching and pure bending. A device for testing specimens for strength is known, comprising a base, a loading mechanism, two gripping devices, one of which is made in the form of a carriage mounted on the base, and a gripper mounted on the carriage can be rotated in a plane perpendicular to the plane of the base. JV The drawback of the device is that it does not allow for testing for eccentric stretching and bending. The purpose of the invention is to enhance the functionality by providing a sample for off-center stretching and bending. This goal is achieved in that the second gripping device is made. In the form of a pivotally connected with the loading mechanism of the suspension, bushings with guide grooves pivotally connected to the suspension, and the grip mounted on the sleeve with the ability to move in the guide grooves, and the grip of the first The gripper has a lock to set it in position. FIG. 1 shows the proposed device, a general view; in fig. 2 section A-A in FIG. one; in fig. 3 device when testing a sample for eccentric stretching; in fig. k is the same when testing a sample for bending. The device comprises a base 1, a loading mechanism (not shown) and two gripping devices, one of which is made in the form of a carriage 2 mounted on the base 1 by means of a screw 3, and a gripper mounted on the carriage 2 can be rotated in a plane perpendicular to the plane bases 1. The second gripping device is made in the form of a hinge connected to the loading mechanism of the suspension 5 of the sleeve 6 with guide grooves 7 and 8 hinged to the suspension 5, and the grip 9 mounted on the sleeve 6 with the possibility of In the guide grooves 7 and 8. The gripper 4 is installed in a predetermined position with the help of the locking pin. 10. The gripping of the gripper 9 is carried out by means of the screw 11. The device works as follows i When testing the sample 12 for extension, it is installed in the grippers k and 9; so that the tensile force from the loading mechanism coincides with the axis of symmetry of the sample. A tensile force is applied to the suspension 5 and the strength characteristics of the test specimen are determined. When testing sample 12 for non-centered stretching, the grip k is moved along guide grooves 7 and 8, sleeves 6 for a predetermined distance, tensile force is applied, and a tension condition arises in the sample caused by eccentric stretching. When testing sample 12 for bending, the grip k is rotated in a plane perpendicular to the plane of the base at an angle of 90 relative to the suspension 5 and lowered it to one level with the grip 9. The gripper 9 is rotated at an angle of 90 in a plane perpendicular to the plane of the base, and fixed in This position with the help of the latch 10. The specimen is placed in the grippers 4 and 9, and the force is applied to the suspension 5, and in this case a stressed bending state arises in the specimen. The proposed design of the device provides test samples for stretching, eccentric stretching and pure bending, since the gripping devices have the ability to change their position relative to each other depending on the type of testing. DETAILED DESCRIPTION OF THE INVENTION A device for testing samples for strength, comprising a base, a loading mechanism, two gripping devices, one of which is made, a form of carriage mounted on the base, and a grip mounted on the carriage can be rotated in a plane perpendicular to the plane of the base, characterized by By the fact that, in order to extend the functionality by providing a sample test for eccentric stretching and bending, the second gripping device is made in. a hinge with a loading mechanism for the suspension; sleeves with guide grooves hinged to the suspension; and a gripper mounted on the sleeve so that it can move in the guide grooves, and the gripper of the first gripping device has a lock for mounting it in a predetermined position. Sources of information taken into account during the examination 1. USSR Author's Certificate No., cl. G 01 N 3/08, 19b9 (prototype).