SU1343291A1 - Installation for impact loading of specimens - Google Patents

Description

113

The invention relates to test facilities for cyclic shock loading of specimens.

The purpose of the invention is to expand the range of loads by providing high-capacity loading.

The drawing shows the installation of a general view.

The installation comprises a frame 1 with two parallel shelves and impactors containing rods 2 for interacting with sample 3 mounted on a frame shelf. Each drummer also contains a power spring 4 connected to the second shelf at one end and installed. so that its axis is perpendicular to the shelves, the electromagnet 5, the coil of which is fixed to the frame with the spring 4, with the bark 6, is rigidly connected with the corresponding rod 2, the other end of the spring 4 is connected with the bark 6.

The installation comprises a platform 7 installed between the shelves of the frame parallel with it with the possibility of reciprocating movement in the direction of their normal, for which purpose the drive 8 is connected to the frame by means of a crank mechanism 9.

The rods 2 are mounted with the possibility of axial movement relative to the platform 7, which is equipped with one of the contacts 10 of the end switch, the second contact 10 is installed

mounted on the frame 1 of the switching unit 11 connected to the supply circuit 12 of the coils 13 and providing a software device for controlling the load.

The installation works as follows.

The actuator 8 is turned on and the platform 7 reciprocates by means of a crank mechanism. Raising to the extreme upper position, the platform 8 abuts against measles 6 and causes the springs 4 to be squeezed. In this case, all the circuits 12 are closed and the coils 13 of the electromagnets 5 hold the coil & hold the measles & s in the compressed state.

Go down to such a position that the rods 2 reach the sample 3, the platform 7 closes the contact Q 5 0

B Q

five

five

0

five

You have a limit switch 10, resulting in the opening of the corresponding voltage lines 12, spring 4 strikes rod 2, and the introduction of delay circuits into the switching unit allows the delay times and the sequence of blows to be varied over wide limits;

The working stroke of the platform is chosen so that it does not touch the sample 3. During reverse movement, the contacts re-close and the chains 12 of the coils 13 are closed, which, when the platform 7 compresses, springs 4 allows them to be kept in a compressed state. As the platform moves down, the process repeats. With the corresponding program assignment, individual drummers can produce loading and not in each cycle.

Claims (1)

Invention Formula An installation for shock loading of samples, containing a frame, a loading device with percussion devices and a software device associated with it, characterized in that, in order to expand the range of loads by providing high-frequency loading, the frame is made with two parallel shelves, the first of which is intended to be fixed sample, and the second - to interact with the impactors, the loading device is made in the form of a platform parallel to the frame flanges and mounted on the frame with the possibility of reciprocating moving between them in the direction of their normal, each drummer contains an electromagnet consisting of a coil fixed on the second shelf, the axis of which is perpendicular to the shelf, and a core coaxially coil mounted axially relative to it, a rod fixed on the core coil, and a coil coaxially coiled at one end on the second shelf, a power spring, the second end of which is connected to the bark, the program device is made in the form of a switching unit with delays of the power supply coils, and SETTING provided with a limit switch switching unit, one contact of which is located on the frame, and the other - on the movable platform.