SU970163A1

SU970163A1 - Impact testing stand

Info

Publication number: SU970163A1
Application number: SU813270286A
Authority: SU
Inventors: Юрий Николаевич Крылов; Александр Германович Граве; Михаил Сергеевич Медведев
Original assignee: Предприятие П/Я А-1298
Priority date: 1981-04-09
Filing date: 1981-04-09
Publication date: 1982-10-30

Description

(54) УДАРНЫЙ ИСПЫТАТЕЛЬНЫЙ СТЕНД(54) IMPACT TEST BENCH

1one

Изобретение относитс к испытательной технике, а именно - к стендам дл испытаний на повторную ударную нагруз-.The invention relates to a test apparatus, namely to test benches for repeated shock loads.

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Известен ударный испытательный стенд дл , испытаний на повторную ударную иагрузку , содержащий стол дл размещени испытуемого издели , установленный с возможностью взаимодействи с кулачко.вым приводом и амортизаторами С Недостатком известного стенда вл етс невозможность регулировани величины ударной нагрузки.A shock test bench is known for repeated shock loading tests containing a table for accommodating a test article that is capable of interacting with a cam. Drive and shock absorbers C A disadvantage of the known test bench is the impossibility of controlling the magnitude of the shock load.

Наиболее близкий к предлагаемому по технической сущности ударный испытательный стенд содержит приспособление,. дл установки испытуемого издели , нагружающий элемент, установленный в направл кших с возможностью взаимодействи с указанным приспособлением, и механизмом разгона нагружающего эпе- .мента, включающий два ротора, установлен . вые на параллельных валах так, что междуClosest to the proposed technical essence impact test bench contains the device ,. To install the product under test, a loading element, installed in the guides with the possibility of interaction with the specified device, and a mechanism for accelerating the loading element, including two rotors, is installed. on parallel shafts so that between

ИХ боковыми поверхност ми имеетс зазор дл захвата роторами нагружающего элемента , привод дл вращени роторов в противоположных направлени х с равными окружными скорост ми и устройсгво дл сближени роторов, при этом нагружающий элемент вьшолнен в виде гибкой т ги, подаваемой в эазЪр между роторами механизмс м запуска, а устройство сближеш роторов представл ет собой винтовую пару дл перемещений подвижно установленного вала одного из роторов 2.THEIR side surfaces have a gap for the rotor to pick up the loading element, a drive to rotate the rotors in opposite directions with equal peripheral speeds and a device for bringing the rotors together, while the loading element is made in the form of a flexible rod fed into the AESrr between the rotors and the starting mechanism and the device for converging the rotors is a screw pair for moving the movably mounted shaft of one of the rotors 2.

Недостатком этого стенда вл етс невозможность воспроизведени повторной ударной нагрузки.The disadvantage of this test bench is the impossibility of reproducing repeated shock loads.

Цель изофе тени - проведение испытаний повторной ударной нагрузкой.The purpose of shadow isofe is to conduct repeated shock loading tests.

Claims

The goal is achieved by the fact that in a shock test bench containing adaptable for the installation of novkv of the test product, the loading element mounted in the guides with the ability to interact with the specified device, in the mechanism of acceleration of the loading element, including two rotors mounted on parallel shafts so that between their side surfaces there is a gap for the rotors to pick up the loading element, a drive for rotating the rotors in opposite directions with equal peripheral speeds and the device for bringing the rotors together, the loading element is made in the form of a rod with a striker at the end, and the device for bringing the rotors together is made in the form of two double-arm levers at one ends of which are installed the rotor shafts of the wedge-shaped pusher to which the second ends of the levers are spring loaded -accessible movement of the pusher. FIG. I schematically depicts the impact test bench; in fig. 2 is a section along A-A in FIG. 1. The stand includes a device I for mounting a test article (not shown), a loading element made in the form of a rod 2 with a striker 3 at the end and installed in guides 4 and 5 with the possibility of interacting with the specified device 1, and the acceleration mechanism of the loading element, including two rotors 6 and 7, mounted on parallel shafts 8 and 9, between the side surfaces of which there is a gap for gripping the loading element by the rotors 6 and 7, to rotate the rotors 6 to 7 in opposite directions with equal circumferential speeds and a device for bringing together rotors 6 and 7, including two double-arm levers, on one ends 1O and 11 of which are installed shafts 8 and 9 of rotors 6 and 7, a wedge-shaped spring-loaded pusher 12, to which the second ends are spring-loaded 13 and 14 double-arm levers, and the drive reciprocating movement of the pusher 12 made, for example, in the form of a cam drive 15. The ends of the Yu and II double-arm levers interact with the stops 16 and 17, In addition, to improve the contact between the rotors 6 and 7 and a shtokom 2 loading el The bushing 18 is mounted on the stem 2, and an annular groove 19 with a corrugated surface is made on the lateral surface of the rotors 6 and 7. The stand works as follows. The test article is fixed to the tool I. The rotors 6 and 7 are accelerated by means of an actuator up to a predetermined rotational speed. The cam actuator 15 acts on the pusher 12, and the latter on the ends 13 and 14 of the double-arm levers, which rotate around their axes, thereby bringing the rotors 6 and 7 closer together. The rotors 6 and 7 shift to meet each other before interacting with the elastic sleeve 18 on the shaft. 2 of the loading element, which is compressed in the annular grooves 19c, with a grooved surface, excluding slippage. The head 3 with the brush 2 is accelerated by the rotors 6 and 7 along the guides 4 and 5 and hits the device I, loading the test article. After that, the loading element bounces off and, thanks to the air liner, as well as to the correctly selected annular gap between the guide 4 and the rod 2, returns to its original position, gently sitting on the end of the bearing guide 5. When the loading element is accelerated, the cam actuator 15 lowers the pusher 12, and the two shoulders, return the rotors 6 and 7 to their original position, at which the ends 10 and 11 of the two shoulders rest on the supports 16 and 17. The cycle then repeats. The cycle time is set by the cam frequency of the actuator 15, and the magnitude of the shock load is set by the rotor speeds of rotors 6 and 7. The proposed stand allows the product to be tested with repeated shock loads with a smooth adjustment of its size, while it is small in size, safe in operation and in There are no magnetic fields and high voltage currents that can introduce distortions in tests of CMM-sensitive products. Claims; A shock test bench containing a device for mounting the tested product, a loading element mounted in the guides with the ability to interact with the specified device, and a mechanism for accelerating the loading element including two rotors mounted on parallel shafts so that there is a gap between their side surfaces gripping by rotors of a loading element, a drive for rotating rotors in opposite directions with different peripheral speeds and a device for bringing together ro