SU781685A1

SU781685A1 - Apparatus for determining adhesive strength between coating and wire

Info

Publication number: SU781685A1
Application number: SU792754900A
Authority: SU
Inventors: Анатолий Федорович Бывших; Евгений Николаевич Ларин; Леонид Александрович Поздняков; Клавдия Степановна Сошнева; Раиса Алексеевна Савицкая
Original assignee: Предприятие П/Я Г-4480
Priority date: 1979-04-05
Filing date: 1979-04-05
Publication date: 1980-11-23

Description

Изобретение относится к испытаниям материалов, а именно к устройствам для определения адгезионной прочности покрытия к проводу.The invention relates to testing materials, and in particular to devices for determining the adhesion strength of a coating to a wire.

Известно устройство для определе- 5 ния адгезионной прочности покрытия к проводу, содержащее два зажима для закрепления образца и механизм приложения растягивающей нагрузки £1}.A device is known for determining the adhesion strength of a coating to a wire, comprising two clamps for securing the sample and a mechanism for applying a tensile load of £ 1}.

Наиболее близким к изобретению по технической сущности и достигаемому результату является устройство для определения адгезионной прочности покрытия к проводу, содержащее пассивный и активный захваты для крепления образца, выполненный из двух сдвигаемых частей, механизм перемещения активного захвата и регулируемый упор £23.The closest to the invention in technical essence and the achieved result is a device for determining the adhesive strength of the coating to the wire, containing passive and active grippers for mounting the sample, made of two movable parts, a mechanism for moving the active gripper and an adjustable emphasis of £ 23.

Недостатком„этих устройств является низкая точность определения адгезионной прочности из-за невозможности обеспечения постоянства деформации провода с покрытием при высокоскоростном испытании за счет энергии в системе.The disadvantage of these devices is the low accuracy of determining the adhesion strength due to the inability to ensure constant deformation of the coated wire during high-speed testing due to energy in the system.

Цель изобретения - повышение точности определения при высокоскоростном испытании образца за счет обес2 печения постоянства предельной деформации образца.The purpose of the invention is to increase the accuracy of determination during high-speed testing of a sample by ensuring constancy of the ultimate deformation of the sample.

Для достижения цели устройство снабжено отсекателем провода, выполненным в виде неподвижного ножа, жестко· связанного с одной из частей активного захвата, и подвижного ножа, шарнирно установленного на этой же части активного захвата симметрично оси крепления испытуемого образца с возможностью взаимодействия его тыльной части с регулируемым упором, а его режущей грани с режущей гранью неподвижного ножа.To achieve the goal, the device is equipped with a wire cutter made in the form of a fixed knife rigidly connected to one of the parts of the active grip, and a movable knife pivotally mounted on the same part of the active grip symmetrically to the axis of attachment of the test sample with the possibility of interaction of its back with an adjustable stop , and its cutting edge with the cutting edge of a stationary knife.

При этом поверхность тыльной части подвижного ножа установлена под заданным углом к осн активного захвата.In this case, the surface of the back of the movable knife is set at a predetermined angle to the main active grip.

На фиг. 1 схематически изображено 20 устройство; на фиг. 2 - закрепление испытуемого образца.In FIG. 1 schematically shows a 20 device; in FIG. 2 - fixing the test sample.

Устройтво содержит пассивный й активный захваты 1 и 2, выполненные из двух сдвигаемых частей 3-6, ме25 ханизм 7 перемещения активного захвата 2, регулируемый упор 8 со шкалой 9 и отсекатель, выполненный в виде неподвижного ножа 10, жестко связанного с одной из частей 5 активного 30 захвата 2, и подвижного ножа 11, шар мирно установленного на той же части 5 активного захвата 2 симметрично оси крепления ипытуемого образца 12.The device contains a passive and active grippers 1 and 2, made of two movable parts 3-6, mechanism 7 for moving the active gripper 2, an adjustable stop 8 with a scale of 9 and a cutter made in the form of a fixed knife 10, rigidly connected to one of the parts 5 active 30 capture 2, and a movable knife 11, a ball peacefully mounted on the same part 5 of the active capture 2 symmetrical to the axis of attachment of the test sample 12.

Устройство работает следующим об-J разом.The device operates as follows ob-J.

Испытуемый образец 12 закрепляют в сдвигаемых частях 3 6 пассивного * и активного захватов 1 и 2. Регулируемый упор 8 устанавливают по шкале 9 на предельную деформацию образца 12. При помощи механизма 7 перемещения через активный! захват 2 прикладывают растягивающую нагрузку к образцу 12.The test specimen 12 is fixed in the movable parts 3 6 of the passive * and active grippers 1 and 2. The adjustable stop 8 is set on a scale of 9 to the ultimate deformation of the specimen 12. Using the mechanism 7 of moving through the active! the gripper 2 exert a tensile load on the sample 12.

При перемещении активного захвата 2 установленные на его сдвигаемой части 5 симметрично оси крепления испытуемого образца 12 неподвижный и под- 15 вижный ножи 10 и 11 смыкаются под действием упора 8 на тыльную часть 13 подвижного ножа 11.When moving the active gripper 2, the fixed and movable knives 10 and 11 mounted on its movable part 5 symmetrically to the axis of attachment of the test sample 12 are closed under the action of the stop 8 on the rear part 13 of the movable knife 11.

В момент соприкосновения наивысшей точки тыльной грани 13 подвижного но- од жа 11 с регулируемым упором 8, режущие грани 14 ножей отсекают образец 12. Активный захват 2 продолжает перемещение, -не оказывая влияния на деформацию образца 12. Таким образом Определяют адгезионную прочность покрытия к про- “ воду на образце с постоянной величиной деформации образца.At the moment of contact of the highest point of the back face 13 of the movable knife 11 with an adjustable stop 8, the cutting edges 14 of the knives cut off the sample 12. The active grip 2 continues to move, without affecting the deformation of the sample 12. In this way, the adhesion strength of the coating to - “water on the sample with a constant strain of the sample.

Claims

The invention relates to the testing of materials, namely, devices for determining the adhesion strength of a coating to a wire. A device for determining the adhesion strength of a coating to a wire is known, which contains two clamps for securing the sample and a mechanism for applying a tensile load ij. The closest to the invention to the technical essence and the achieved result is a device for determining the adhesion strength of a coating to a wire, containing passive and active grips for fastening a sample, made of two shifted parts, a mechanism for moving an active gripper and an adjustable stop. 1W with low accuracy of determination of adhesive strength due to the impossibility of ensuring the stability of the deformation of the coated wire during high-speed testing due to energy in Istemi. The purpose of the invention is to improve the accuracy of determination in the case of high-speed testing of a sample due to the maintenance of a constant strain of the sample and the liver. To achieve the goal, the device is equipped with a wire cutter made in the form of a fixed knife rigidly connected to one of the parts of the active grip and a movable knife hinged on the same part of the active grip symmetrically with the axis of attachment of the test specimen with the possibility of its back part interacting with the adjustable an emphasis, and its cutting edge with the cutting edge of a motionless knife. The surface of the rear part of the movable knife is set at a given angle to the axis of the active grip. FIG. 1 schematically shows the device; in fig. 2 - fixing the test sample. The device contains passive and active grippers 1 and 2, made of two shifted parts 3-6, a mechanism 7 for moving the active grip 2, an adjustable stop 8 with a scale 9 and a cutter made in the form of a fixed knife 10 rigidly connected to one of the parts 5 active grip 2, and a movable knife 11, a ball-rim mounted on the same part 5 of the active grip 2 symmetrically with the axis of attachment of the test sample 12. The device operates as follows about -j again. The test specimen 12 of the head is placed in the shifted parts 3-6 of the passive active jaw 1 and

2. The adjustable stop 8 is set on the scale 9 to limit the deformation of the sample 12. Using the mechanism 7 for displacing the active grip 2, a tensile load is applied to the sample 12. When the active grip 2 is moved, mounted on its shifted part 5 is symmetrical to the axis of attachment of the test sample 12 fixed and podE11zhschi jHOjgH 10 and 11 under the action of the stop 8 on the back part 13 of the movable knife 11. At the moment of contact of the highest point of the rear face 13 podpizhzhnch :) knife 11 with an adjustable stop 8, cut the face of the 14 Knives cut off the image Step 12. The active grip 2 continues the displacement, without affecting the deformation of the sample 12. Thus, the iD1oionic strength of the coating to the wire on the sample with a constant deformation value of the sample is determined. Claim 1. Device For determining adhesion strength of a coating to a wire,

one

I G II 17

1 containing passive and active grippers for fastening the specimen, made of two shifted parts, the fur of the movement of the active gripper and the adjustable stop, which aphid ess: with the aim of increasing the exact test of the specimen by ensuring constant of the ultimate deformation of the specimen, it is equipped with a wire cutter made in a visible-moving knife rigidly connected to one of the parts of the active grip, and a movable knife hinged on the same part. TIVY5GD capture symmetrically to the axis of attachment of the test sample with the ability to interact with its back part with a retouched stop, and its cutting face - with the cutting edge of a fixed knife. 2. The device according to claim 1, that is, that the surface Tt of the mb part of the movable knife is set at a predetermined angle to the axis of the active grip. Sources of information taken into account in the examination 1.Prizezentsev V.P., Peshkov I.B. Winding and assembly wires, M., Energie, 1971, p. 224. 2. Enameled round wires. Adhesion Test GOST 14340-2-69. M., 1976, p. 3-4 (prototype).