SU993078A1 - Stand for article impact testing - Google Patents

Description

The invention relates to test equipment, namely, stands for testing products for impact. .

A stand for testing products for impact is known, comprising a base, mounted on the basis of guides, mounted in guide tables for fastening a test article on it, a pulsed energizer for accelerating the table and a hydraulic brake 1 interacting with the table.

The disadvantages of this stand include the complexity of the design and the limited range of reproducible impact loads due to the significant number of components of the table.

Closest to the proposed technical entity is a stand for testing products for impact, containing a base with vertical guides fixed on it and parallel guide columns, mounted in the guide tables to fix the test item on it, a pulsed energizer that serves to accelerate the table and a hydraulic brake working with the table

in the form of clip-on hoses mounted on the columns of elastic hoses filled with working medium, rollers clamping the hoses, divided into two cavities, which are communicated through a controlled choke, and carrier rollers of movable sleeves installed with the possibility of interaction with the table. The bushings are mounted on columns with the possibility of moving C2 along them.

The disadvantages of this stand lie in its fragility and lack of reliability in operation, which are explained by the rapid wear of the rubbing sleeve-column pairs due to considerable frictional forces, because when the sleeve moves along the column in the transverse direction, a force of 20 seconds is pressed on by the roller ishastic ishanga.

The purpose of the invention is to increase the share of the bole and reliability of the stand.

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Claims (2)

The goal is achieved by the fact that in the stand for tested products for impact, containing a base with vertical guides fixed on it and parallel guides, columns mounted in the guide tables for securing the test product on it, a pulsed energizer for table acceleration and a hydraulic brake interacting with the table, made in the form of elastic hoses fixed to the columns, filled with the working medium, rollers pinching the hoses, dividing them into two cavities, which They are communicated between themselves through a controlled choke, and bearing rollers of movable sleeves, installed with the possibility of interaction with the table, sleeves are mounted on table guides and rigidly connected to each other. -Thanks to the fact that the sleeves are rigidly fastened together, i.e. the reaction forces of the rollers are balanced, the friction forces in the pair of sleeve-guide are significantly reduced. The installation of the sleeves on the guide tables is necessary for the convenience of connecting them together. The drawing shows the proposed stand. The stand contains a base 1 with vertical guides 2 fixed on it and parallel columns 2 guiding parallel 2, mounted in guides table 4 for fastening test product 5 on it, pulsed energizer 6, which serves to accelerate table 4, and interacting with table 4 hydraulic a brake made in the form of 3 elastic hoses 7 fixed on the columns, filled with the working medium, rollers b, pinching the hoses 7, a section, they have two upper cavities 9 and lower 10, which communicate with each other via control units throttle 11, and carrier rollers 8 of movable sleeves 12 mounted on rails 2 with the ability to interact with the table 4. The sleeves 12 are rigidly interconnected with a carriage 13. The stand works as follows b in the initial position table 4 is located on the energizer b and does not come in contact with the hydraulic brake bushing / w 12. The distance from the sleeves 12 to the table 4 is determined from the maximum acceleration path of the table 4 during the formation of the shock pulse. Energizer 6 immediately chases table 4 with the tested product 5. Moving, table 4 begins to interact with bushings 12, moving them up, while it brakes in accordance with a given law due to throttling of the working medium in elastic hoses 7 from cavity 9 into the cavity 10 through the control throttle 11. Thus, table 4 is kinematically connected with the hydraulic brake during braking. After the speed of the table 4 is extinguished, it, together with the carriage 13, begins to move downward under the action of its own weight, and the working medium flows from the cavity 10 into the cavity 9 of the hoses 7 through the throttle 11, and the table 4 gradually returns to its original position. The magnitude of the braking force is regulated by the controlled throttle 11. The proposed stand is more durable and reliable in operation, because in it, due to the reduction of friction forces between the sleeves and guide rails, wear of the rubbing surfaces, jamming of the sleeves, and, consequently, violation of the braking mode are reduced. Claims for testing products for impact, containing a base with vertical guides mounted on it and vertical guides and parallel guide columns, mounted in the table guides to fasten the test article on it, which serves to accelerate the table and interact with the table a braking brake made in the form of elastic hoses fixed on the columns i of the hoses filled with the working medium, rollers clamping the hoses, dividing them into two cavities which are communicated between th controllable via a throttle, and bearing bushings movable rollers, mounted for engagement with the table, characterized in that, in order to increase the durability and reliability of operation, sleeve mounted on a guide section and rigidly interconnected. sources of information taken into account during the examination 1. USSR author's certificate No. 560153, cl. G 01 M 7/00, 1U74. 2. USSR author's certificate number 859847, cl. G 01 M 7/00, 1979 prototype).