SU1305549A1 - Device for impact testing of articles - Google Patents

Abstract

The invention relates to a testing technique, in particular, to devices for shock loading in testing products. The aim of the invention is to improve the accuracy of reproduction of a shock pulse in devices containing a shock pulse shaper in the form of a ball of plastic material, by increasing the stability of the ball rotation at high impact speeds and multiple shocks. The goal is achieved by creating for the ball such conditions of bearing, under which it is subjected to a pair of forces at any speed of impact, which unfolds it to the required angle. The device comprises a body 1, a shock pulse shaper in the form of a ball 2 made of plastic material, a rod 3 centrally impinged on the ball 2 and housed in the body I is a ball support. The support is made in the form of successively installed convex elastic plate 4 of variable thickness, in contact with the ball 2 with the convex side, and a flat plate 5, on which the convex plate 4 is supported. The flat plate 5 is mounted on the elastic element 6. The body 1, the ball 2 and the support elements form a drummer impinged on the rod 3. A sinusoidal impulse with a given amplitude and duration is formed by the interaction of the ball 2 with the spherical end of the rod 3. The plastic imprint formed on the ball is removed from the zone of blowing pin by elastic deformation of the plate 4 and the bias reaction force with the hammering axis to the desired value 2 yl. V with S (L 00 o JV JV 4 CO

Description

one

The invention relates to a test apparatus, in particular to devices for impact testing of products.

The purpose of the invention is to improve the accuracy of the shock pulse in devices containing a shock pulse shaper in the form of a ball of plastic material, by increasing the stability of the ball turning at high impact speeds and repeated shocks,

The goal is achieved by making the ball support in the form of successively installed in the housing, which serves to install the ball, a convex elastic plate of varying thickness, in contact with the ball with a convex side, and a flat plate on which the convex plate is supported.

Fig. 1 shows the proposed device prior to the formation of the shock pulse; Fig. 2 is the same at the time of the formation of the shock pulse and the rotation of the ball,

The device comprises a housing 1, a shock pulse shaper in the form of a ball 2 made of plastic material, a rod 3 centrally impinged on the ball 2, in particular a waveguide, and a support stop arranged in the housing 1, made in the form of successively installed convex elastic plates 4 of variable thickness with the asymmetric law of its change in contact with the ball 2 on the round side at the point located on the axis of impact, and the flat plate 5, on which the convex plate 4 is supported, is mounted on the elastic element 6,

The body 1, the ball 2, the plates 4 and 5 and the elastic element 6 form a drummer impinging on the rod 3. The fixture 7 for fastening the test article (not shown) contacts the end face of the rod 3.

The writeable bump test device operates as follows.

An accelerating device (not shown) gives the striker the necessary speed, after which its central collision with rod 3 occurs. A sinusoidal shock pulse with a given amplitude and duration is formed when the ball 2 interacts with the spherical end of the rod 3, while on the surface of the ball 2 in month 13055492

Those of its contact with the rod 3 form a zone of plastic deformation in the form of a print (insert),

Under the action of the force arising during an impact, a convex plate 4 is deformed, as well as a convex plate 4 has a variable thickness,

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consequently, stiffness, then the deformation of the plate 4 starts from a place with a lower stiffness. In this case, the ball itself creates a ledge for itself, t, e., The contact area between the ball 2 and the convex plate 4 increases (Fig 2), and the point of application of the resultant reaction force from the side of plate 4 is displaced relative to the axis of impact. a pair of forces F. and F. (reaction force), not lying on one line and oppositely directed. As a result of this pair of forces, a turning point arises, under the action of which the ball 2 is rotated and the plastic imprint is retracted from the zone of the subsequent impact. position,

thirty :

The use in the support of the sphere-former of the shock impulse of an elastic convex plate of variable Thickness makes it possible to increase the stability

35 rotation of the ball and the reliability of the removal of the plastic imprint of the ball from the next blow, which provides an increase in the accuracy of the formation of shock pulses,

40

Claims (1)

Invention Formula Device for impact testing of products containing device 45 for fastening the tested product, the body with the shaper of a shock impulse in the form of a ball of plastic material installed centrally A rod struck with a ball, placed in the body of the ball support, the point of contact of which with the ball is on the axis of impact, and an elastic element on which the support is mounted, is about 55 in order to increase the accuracy of the shock pulse during by increasing the stability of the ball turning when consequently, stiffness, then the deformation of the plate 4 starts from a place with a lower stiffness. In this case, the ball itself creates a ledge for itself, t, e., The contact area between the ball 2 and the convex plate 4 increases (Fig 2), and the point of application of the resultant reaction force from the side of plate 4 is displaced relative to the axis of impact. a pair of forces F. and F. (reaction force), not lying on one line and oppositely directed. As a result of this pair of forces, a turning point arises, under the action of which the ball 2 is rotated and the plastic imprint is retracted from the zone of the subsequent impact. position, : The use in the support of the sphere-former of the shock impulse of an elastic convex plate of variable Thickness makes it possible to increase the stability rotation of the ball and the reliability of removal of the plastic footprint of the ball from the next blow, which improves the accuracy of the formation of shock pulses, Invention Formula Device for impact testing of products containing device for fastening the tested product, the body with the shaper of a shock impulse in the form of a ball made of plastic material installed with the possibility of rotation, centrally the rod struck with the ball, placed in the body of the ball support, the point of contact of which with the ball is on the axis of impact, and the elastic element on which the support is mounted, is necessary in order to increase the accuracy of the shock pulse reproduction by increasing stability of the rotation of the ball when vys313055494 the speed of impact and repetition, in contact with the ball of the thrust, the onopai is made in the visible side, and mounted on the elements of the flat plate, successively installed by the convex element, A variable elastic plate is inserted through the plate. Editor A. Kozoriz Compiled by V. Finogenov Tehred N.Glushchenko Proofreader L.Pilipenko Order.1421 / 40 Circulation 777 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing plant, Uzhgorod, Projecto st., 4 FIG. 2