SU938058A1 - Device for article dynamic testing - Google Patents

Description

one

The invention relates to a test apparatus, in particular to devices for testing products and samples for the effects of shock loads.

A test bench for shock loads is known, comprising an inclined plane (a ramp with guides, a movable platform installed in the guides for mounting the test article, and a braking device, during the interaction with which a predetermined impact pulse 1 is generated.

The disadvantage of the stand is its large size.

The closest to the invention to the technical essence is a device for dynamic testing of products, comprising a movable element, a compressible spring for accelerating the movable element and a trigger mechanism including a spring loaded in its plane of rotation

connected at one end with a movable element, and a lock of the initial position of the lever, interacting with its other end. Prior to testing the SRI, the movable element is moved in the direction of compression of the spring and fixed in a predetermined position by inserting it in direct contact with the end of the lever. In this case, a predetermined stock of potential energy is accumulated in the spring. In a position in which the movable element is in interaction with the lever, the latter is held by a lock

15 of the initial position of the lever.

When the latch is released, the lever rotates under the action of its spring and releases the movable element 2.

Claims (2)

20 However, the device does not allow adjustment of the parameters of dynamic loading, since the lever can lock the movable element in only one position. And, therefore, the compressible spring accumulates the same amount of potential energy. The purpose of the invention is to regulate the parameters of dynamic loading. The goal is achieved in that a device for dynamic testing of products, comprising a movable element, a compressible spring for accelerating the movable element and a trigger mechanism, including a lever spring-loaded in its plane of rotation, connected at one end to the movable element, and interacting with its other end, the first end of the lever is made with a beveled surface, and its connection with the movable element is carried out by means of a wedge-shaped finger, which is mounted on VISION installation element with the possibility of movement relative to the element and contacts the chamfered surface of the lever. In this case, the bevel angle of the lever surface can be made smaller than the friction friction angle of the lever-to-finger pair. Figure 1 shows the proposed yctoway, longitudinal section; figure 2 - rdzrez aa in figure 1. The device comprises a base 1 with guides 2, a movable element 3 for mounting the test product, a compressible spring 5 for accelerating the movable element 3, a power hydro cylinder 6 for compressing the spring S, a deceleration driver 7 and a trigger mechanism that activates the lever 8 , spring-loaded with a spring E, latch 10 of the initial position of the lever 8, tgu 11, connecting the latch 10 with its drive (not shown), and a wedge-shaped pin 12 mounted on the movable element 3 using interchangeable gaskets 13 and interacting with The loosened surface l of the lever 8, the device operates in the following way | lsc | f1. Before testing, the movable element 3 with the product k installed on it, under the force of the hydraulic cylinder 6, is brought to its initial position, in which it is locked with a wedge-shaped finger 12 interacting with the lever 8. The lever 8 is held in the initial position 84 of the latch 10. When this spring 5 is compressed. When the descent drive is turned on, the ha 11 moves the latch 10, which releases the lever 8. The latter rotates under the action of the spring 9 and its beveled surface 1 comes out of contact with the wedge-shaped finger 12. The moving element 3 begins to move with acceleration under the action of the compressed spring 5. The braking of the movable element is carried out by the former 7. The adjustment of the parameters of the dynamic load is accomplished by changing the position of the wedge-shaped pin 12 by replacing the gaskets 13. In the initial position of the movable element 3 and, consequently, the degree of compression of the spring 5. In addition, the dynamic load parameters can be changed by changing the stiffness of the spring 5. When the bevel angle of the surface 14 is less than the friction angle of the pair, the lever 8 - the finger 12 decreases the load on the elements of the trigger mechanism and, thereby, increases its durability. The use of the proposed device allows, through the use of simple technical means, to expand the range of reproducible dynamic loads. Claims An apparatus for dynamic testing of products, comprising a movable element, a compressible spring for accelerating the movable element and a trigger mechanism, including a lever which is spring-loaded in its plane of rotation, connected at one end to the movable element, and locking the initial pole of the lever, interacting with another an end, characterized in that, in order to adjust the parameters of dynamic loading, the first end of the lever is made with a beveled surface, and its connection with the movable element en by means of a wedge-shaped finger, which is mounted on a movable element with the possibility of installation movement relative to 5 9380586 of this element and contacts with the sources of information mowed surface of the lever. taken into account during the examination 2. The device according to A.1, about tl and which is so that the bevel angle1. USSR author's certificate the surface of the lever is made smaller, s No. 315075, cl. O 01 M 7/00 I960 friction angle than a pair of sn-2 friction. Patent of Germany No. 2114 09 . Day 21/02, 1972 (prototype).