SU853485A1

SU853485A1 - Method and specimen for investigation of friction and wear

Info

Publication number: SU853485A1
Application number: SU792789724A
Authority: SU
Inventors: Виктор Николаевич Подураев; Александр Александрович Барзов; Николай Дмитриевич Голдобин; Владимир Павлович Логинов
Original assignee: Московское Ордена Ленина И Орденатрудового Красного Знамени Высшеетехническое Училище Им. H.Э.Баумана
Priority date: 1979-07-04
Filing date: 1979-07-04
Publication date: 1981-08-07

Description

1one

Изобретение относитс к способу исследовани триботехнических свойств материалов.The invention relates to a method for studying the tribological properties of materials.

Известен способ исследовани тре- . НИН и изнашивани с помощью образца дл е,го регшизации, выполненного в виде пр молинейного цилиндрического стержн , заключающийс в том, что образуют фрикционную пару, сопр га ис- Q следуемую поверхность образца с контробра здом, нагружают ее сжимающей силой, привод т ее элементы в относительное движение и регистрируют изнас и силу трени 13.. .-,A known method for investigating the ter-. NIN and wear with the help of a specimen for repair, made in the form of a rectilinear cylindrical rod, consisting of forming a frictional pair, which match the test surface of the specimen with a contra-arm, are loaded with a compressive force, its elements in relative motion and register the wear and strength of the friction 13 .. .-,

Однако этот способ не обеспечивает достаточной точности определени триботехиических характеристик материала . Это обусловлено тем, что не воспроизвод тс реальные услови наг- руженности ф1рикционного контакта образца , который подвержен силовому воздействию не только со стороны взаимодействующего с ним контробразца, но и воздействию волн упругих напр жений , генерируе№ х в других фрикционных сопр жени х и акустически св занных с образцом.However, this method does not provide sufficient accuracy in determining the tribotechical characteristics of the material. This is due to the fact that the real conditions of the load of the friction contact of the sample, which is subject to force not only from the counter piece interacting with it, but also to the effects of elastic stress waves generated in other friction joints and acoustically bound Sampled with the sample.

Цель изобретени - повышение точности результатов испытаний. . 30The purpose of the invention is to improve the accuracy of the test results. . thirty

Эта цель достигаетс тем, что одновременно с исследуемой фрикционной парой из вспомогательной поверхности образца и вспомогательного контр- образца образуют вспомогательную фрикционную пару, нагружают ее сжимающей силой и привод т ее элементы в относительное движение, а на исследуемой поверхности образца регистрируют также амплитуду и частоту волн упругих напр жений.This goal is achieved by the fact that, simultaneously with the friction pair under study, an auxiliary friction pair is formed from the auxiliary surface of the sample and the auxiliary contra-sample, is loaded with a compressive force and causes its elements to move in relative motion, and the amplitude and frequency of the elastic waves stress

Способ реализуетс с помощью образца , выполненного в виде пр молине ного цилиндрического стержн , конец которого со стороны исследуемой поверхности выполнен коническим, а в его теле выполнены радиальные отверсти , заполненные вставками из демпфирующего материала.The method is implemented using a sample made in the form of a straight cylindrical rod, the end of which is conical on the side of the test surface, and its body has radial holes filled with inserts of a damping material.

Способ по сн етс .чертежом, на котором изображено устройство дл его реализации.The method is explained in the drawing, which shows a device for its implementation.

Claims

The device includes a housing 1, on which a fixed 2 and a movable 3 actuators of the auxiliary counter piece 4 and a counter piece 5 are mounted. Sample B, performing the function of a waveguide, is mounted in a movable carrier holder 7 on point supports 8, to which is tightened with screws 9. 3 and a mobile non-existent holder 7 are connected to the loading devices 10 and 11 and the measuring indicators 12 and 13, respectively, intended to record wear. The method is implemented as follows. Sample 6 is mounted in a movable carrier holder 7 on supports 8 which are pressed with screws 9 .. With the help of a loading device 10, the contra-sample 5 is pressed against the surface F of sample b to be examined, forming a test friction pair. At the same time, with the help of the loading device 11, the auxiliary counterpiece 4 is pressed against the auxiliary surface I of the sample b, forming an auxiliary friction pair. Drives 2 and 3 are turned on, counterbracks 4 and 5 are displaced. The surface wear is determined after a certain period of time by the formula: .-.:,. th –H-dM –di, where LC IDC2 changes the indications of indicators 13 and 12, which is relevant for a given period of time. The test friction pair is examined; on the surface F, the amplitude and frequency of elastic stress waves are recorded, generated by an auxiliary friction wave, pair. The blaze of this operation compares the characteristics of the processes of wear to friction with the level of elastic stresses arising on the studied top. The wavelength of elastic stresses arising on the surface F can be easily changed, using sample b, the end of which is conical on the side of the surface under study, and in its body there are blind holes filled with inserts 14 made of damping material. The cone on the side of the investigated surface F concentrates the waves of elastic stresses on it, and the inserts 14 reduce them, increasing the acoustic resistance of the sample b. By changing the materials of the inserts and their numbers as well as the taper of the sample, the proposed method can investigate the role of elastic stress waves in the processes of friction and wear. Claim 1. A method for studying friction and wear and a sample for its implementation, which consists in forming a test friction pair, matching the test sample surface with a contra-sample, loading it with compressive force, bringing its elements into relative motion and registering wear and friction force, about aphid arrays, so that, in order to increase the accuracy of the test results, simultaneously with the friction pair under study, from the auxiliary surface of the sample and the auxiliary counterpiece, form the frictional friction pair is loaded with a compressive force n and its elements are brought into relative motion, and the amplitude and frequency of the elastic stress waves are also recorded on the sample surface under study.

2. A sample for studying friction and wear according to claim 1, made in the form of a rectilinear cylindrical rod, characterized in that its end on the side of the test surface is made conical, and its body has radial holes filled with inserts made of a damping material. Sources of information taken into account in the examination 1. D. Moore. Basics priboniki. M. World, 1978, p. 291 (prototype).