SU690352A1 - Stand for testing articles for alternating loads - Google Patents

Description

- VI.-The invention relates to test equipment, namely, stands dp ns / product tests for alternating loads. A known stage for dynamic use of products for pulsed loads, containing a base mounted on a flexible connection, a mobile platform dp for attaching the tested article, a drummer interacting with the platform, and a pneumatic damper of the platform flj. However, such a stand does not allow Carrying out dynamic tests without alternating loads. The closest in technical terms to the invention is a stevd for testing products for alternating loads, containing a base with guides, a movable platform mounted in the guides for attaching the "1 st product, located on opposite sides) E1 Lat forms and interacting with her drummer and movable. a buffer mass attached to the buffer mass on the side of the ylachfarm; an elastic element; a device for accelerating the impactor t2l. But the well-known stand, as, reproduces the multi-layer load, since “the nightform and the buffer mass are modeled through the elastic element of a single action. .. The purpose of the invention is to reproduce the multi-cycle load. The goal is achieved by the fact that the elastic element is fastened to the platform. The drawing shows the departing stand. The bench contains a & 1 with guides 2, installed; The movable ylatform 3 n is secured in guides, test item 4 is secured, disassembled from the opposite sides of the platform is, and the impactor 5 and the movable buffer mass 6 fixed to the buffer mass 6 from the side

platform 3 is an elastic element 7 fixed with platform 3, a device for acceleration of the striker 5, mounted on the platform 3 on the side of the striker 5 elastic, the element 8 and the brake device 9 of the buffer mass; 6. A device for acceleration of the striker 5 comprises a barrel 10, a holder 11 of the striker 5 in the initial position, an opening 12 for communicating with a source (not shown) of the compressed gas and a piston chamber 13. The drummer 5 and the buffer mass b are also installed in the guides 2 .

The stand works as follows. The compressed source gas flows through the opening 12 into the pre-piston chamber 13. When a certain amount of pressure is applied to the impactor 5, the communication of the holder 11 and the impactor 5 fails. The impactor, moving in the barrel 1O, accelerates to a given speed and collides The elastic element 8 with the platform 3. In this case, the elastic elements 7 and 8 are deformed relative to the buffer mass 6, the accumulator energy. Under the action of the elastic forces of the element 7, the platform 3 oscillates with respect to the buffer mass

b. At the same time, the multiply load of the test article 4 is reproduced. Amplitude-frequency parameters and loads are formed by selecting the parameters of elastic elements 7 and 8, masses 5, platform 3 with product 4,

L /: /

buffer mass 6 n speed drummer 5,

At. If necessary, after the end of the test, the platform-buffer mass is braked to a stop by means of the device 9, the type and parameters of which are determined by the permissible load of the product 4 after the impact of the test load.

Claims (2)

Invention Formula A stade for pushing products to alternating loads, containing a base with direction, mounted in guides for a movable platform for. fastenings of the product under investigation, located on opposite sides of the platform and interacting with it a drummer and a moving buffer mass, fixed on the buffer mass on the platform side, an elastic element, a device for acceleration of the drummer, so that, in order to reproduce the multi-cycle load, the elastic element is fastened to the platform. Very well and informed, taken into consideration in the examination 1, Batuev G, S., et al. Engineering methods for studying shock processes. M., Mashishstroenie, 1969, p. 28-29. 2. USSR author's certificate No. 315075, cl. G 01 M 7 / OO, 1969; , 8 o f 3s ".