SU868439A1

SU868439A1 - Device for measuring forces to testing machine

Info

Publication number: SU868439A1
Application number: SU792803179A
Authority: SU
Inventors: Михаил Сергеевич Егоров
Priority date: 1979-07-31
Filing date: 1979-07-31
Publication date: 1981-09-30

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ УСИЛИ11 К ИСПЫТАТЕЛЬНОЙ МАШИНЕ(54) DEVICE FOR MEASURING STRENGTH11 TO THE TESTING MACHINE

1one

Изобретение относитс К измерительной технике и может быть использовано при исслеаовании механических свойств материалов.The invention relates to a measuring technique and can be used in the study of the mechanical properties of materials.

Известно устройство, ол измерени усилий к испытательной машине, соаержащее рычажно-ма тниковый сипоизмеритель , опора которого пре щазначена дл устанс ки на траверсе машины, а ото из плеч рычага преоназначено дл шарHHfMoft св зи с захватом tljA device is known that measures the forces applied to a test machine, which contains a lever-rim metering device, the support of which is intended for installation on the traverse of the machine, and that from the arms of the lever is intended for a ball Hlfmoft coupling with a grip tlj

Нецостатком этого устройства вл етс невозможность провецени на нем испытани на раст жение - сжатие без перестановки образца.A disadvantage of this device is the impossibility of carrying out a tensile test on it - compression without moving the specimen.

Наиболее близким к г|}еалагвемому по технической сущности и достигаемому результату вл етс устройство дл измерени усилий к испытательной машине, включающее в себ трубчатый упругий элемент и систему измерени его аефор- маиии ГThe device closest to r |}, which is technically and achievable, is a device for measuring forces to a testing machine, which includes a tubular elastic element and a system for measuring its strength and

Недостатком этого устройства вл етс его низка точность, так как при цикли-The disadvantage of this device is its low accuracy, since during cycling

ческих испытани х с переходом через О датчик работает то на раст жение, то на сжатие, что приводит к искажению записываемой анаграммы и большим погрешност м при малых нагрузках.This method of testing with passing through an O-sensor works either in tension or compression, which leads to a distortion of the recorded anagram and large errors at low loads.

Цель изобретени - повышение точное ти измерени путем обеспечени работы упругого элемента только на сжатие.The purpose of the invention is to increase the exact measurement by ensuring that the elastic element works only in compression.

Дл достижени этой цели устройство снабжено фланцами, размещенными на торцах упругого элемента, один из которых прешазначен дл установки его в траверсе испытательной машины, двум гайками, предназначенными дл установки на т ге испытательной машины с возможностью взаимодействи их с фланцами , и втулкой с наружной резьбой, установленной коаксиально одной из гаек с возможностью взаимодействи со вторым фланцем и предназначенной дл закреплени ее с помощью резьбы в траверсе испытательной машины.To achieve this goal, the device is equipped with flanges located on the ends of the elastic element, one of which is pre-assigned to be installed in the traverse of the testing machine, two nuts to be installed on the rod of the testing machine with the possibility of their interaction with the flanges, and a sleeve with external thread, installed coaxially one of the nuts with the ability to interact with the second flange and designed to secure it with a thread in the traverse of the testing machine.

Claims

The drawing shows a diagram of the device. The device contains a tubular elastic element 1, flannels 2 and 3, placed in the “ends 4 and 5 of element 1, nuts 6 and 7, predetermined ol of the installation on tracer 8 of the testing machine with a flange 2 and 3, sleeve 9 with an external thread 10, which is fitted forwards to the nut 6 and is znamenny-fastened with thread 10 in the traverse of the II test machine, and the measurement system for formation 3 is designed to be installed in the socket 12 of the traverse 11. The device works in the following way. A nut 7 is mounted on the tug 8, then a flange 3 is installed on the socket 12 of the crosspiece 11, and an elastic element I is placed on it so that its end 5 interacts with the flange 3. Then on the end 4 of the element 1 a flange 2 is installed, and 8 - nut 6 and, tightening the nuts 6 and 7, tighten the elastic element I, then, screwing the sleeve 9 into the traverse, fix the elastic element I with flanges 2 and 3 relative to the crosspiece II. Under the action of the tensile force on the tg 8, the nut 7 moves away from the flange 3, and the nut 6 presses on the flange 2 and through the negation on the plate 4 of the elastic element I, which rests with the end 5 on the flange 3, and through it on the socket 12 and squeezes , captures the current force. Under the action of the compressive force on the t 8, the nut 6 departs from the flange 2, and the nut 7 presses on the flange 3 and through it on the end 5 of the element G. Element I in its circle presses with its end 4 on 86 4 flange 2, and through it on the sleeve 9, which is rigidly connected to the crossmember I. The element I is again compressed and fixes the acting force. Thus, in any direction of action of the force on the pull 8, the elastic element is always compressed, and its measurement is not affected by the measurement of the direction of the force. to measure the force to the testing machine, including Its tubular elastic element "1T" and a system for measuring its deformation, characterized in that, in order to increase the measurement accuracy by ensuring that the elastic element works only in compression, it is provided with flanges placed on the ends of the elastic element, one of which is intended for it in the traverse of the testing machine, with the number of vikes intended for mounting on the testing machine t with the possibility of interacting with the flanges, and with an external thread bushing installed with one single nut with the possibility of and the interacting with the second flange and is intended for fastening it to the crossbeam in pomsitsyu thread ispytate / noy machine. Sources of information taken into account in the examination 1.Manager for the machine. M., Mashpnz, 195Q, T. 6, p. 2-3.

2. Tensometry in mechanical engineering 1i. Reference book, M., Mashinostroenie, 1975, p. 153-154 (prototype).