SU1325324A1 - Pendulum impact testing machine for testing materials at complex impact load - Google Patents

Abstract

This invention relates to a testing technique. The aim of the invention is to expand the operational capabilities by providing impact tests under the combined effect of impact stretching and bending. The drill head contains a frame 1 with a tank 2 and a hammer 6, grippers 3 and 4, which serve to fasten the sample 5, and a cross member for engagement with the stops. To create a complex shock load, the pile driver is equipped with a load 10 mounted on the rod of the tandem 2 with movement along it, and in the middle of the cross member an additional stop 11 is placed to interact with the load 10. When the tilt 2 turns, the load 10 moves along the tambour 2 and the shock with a stop 11, creating a shock bending load on the sample 5. The tensile shock load is applied to the sample 3 by the interaction of the ends of the cross-member with the stops. The sequence of application of shock loads is controlled by changing the position of the stops on the circular guides. The non-centrifugal tensile stress is achieved by displacing the stops one relative to the other. 1 hp f-ly, 2 pcs. With fl (Rig.1

Description

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The invention relates to a testing technique, namely, an ejector frame for testing materials under complex shock loading.

The purpose of the invention is to expand the operating capacity of the matic copra by providing materials testing under the combined impact of tensile and bending loads.

The goal is achieved by applying a load, which means that the possibility of moving a tambourine along the rod and interacting with the support of a cross member mounted on the grip.

FIG. 1 shows a schematic of a mating copra; in fig. 2 shows section A-A in FIG. one. .

A matting head contains a frame 1, hingedly connected to the frame 1, a mandrel 2, grips 3 and 4 for fastening the sample 5, with one gripper

3 is fixed on the back of the hammer 6.ma tnik 2, and on the second capture

4 a cross bar 7, stops 8 and 9 mounted on the frame 1 with the possibility of impact with the ends of the cross bar 7. In addition, the pile driver is equipped with a weight 10 mounted on the rod of the tandem 2 with the ability to move along it, and an additional stop 11 installed in the middle of the cross bar 7 and intended for impacting a load of 10.

NIN of the equilibrium of the tambour 2, the stretching blow is applied first, the swing of 2 hangs on stops 8 and 9, the load 10 deals a destructive bending blow. When the stops 8 and 9 are displaced relative to the line, perpendicular to the axis of the guides 13, the misalignment of the tensile load is adjusted: the farther one stop is displaced relative to the other, the greater the misalignment of the load. 2. The tiller 2 is driven by the weight of the hammer 6 and the load 10 is turned, and the load 10 rushes down and along the tandem rod 2. When the equilibrium position is passed, the load 10 causes a bending impact on the additional stop 11 on the cross member 7 and

20 creates a bending impact load of the sample 5. The tip 2 continues to move and after a specified time one side of the cross member 7 hits the stop. A misaligned tensile stress is created.

25 load on sample 5, part of its volume is loaded with a greater tensile load than the other part of the volume (more stretched part of sample 5 is directed to the side of the cross 30 and the stop 9), then the other side of the crossbar 7 hits the stop 8, load misalignment reducing

but this does not disappear, and with such an uneven increase of the load tip Each stop 8 and 9 fasten the connector-35 and the sample 5 is destroyed by the rotary joint 12 on the circumferential bias force

equal to 13. Latch 14 serves to hold the tandem 2 in the original horizontal position

The installation works as follows.

Set the tambour 2 to its original horizontal position and secured with the latch 14. Transfer the weight 10 to the base of the tiller and secure the test sample 5 in grips 3 and 4 with the cross bar 7 on the hammer 6. Place the stops 8 and 9 on the circular guides 13 in positions selected according to

delay between blows and with misalignment of tensile load. In this case, proceed from the following. The further the stops 8 and 9 are displaced to the right (Fig, 1) from the equilibrium position of the tiller 2, the greater the delay in the moment of the application of the stretching impact of the bending of the impact. If the stops are shifted to the left of the position

NIN of the equilibrium of the tambour 2, the stretching blow is applied first, the swing of 2 hangs on the stops 8 and 9, the load 10 deals a destructive bending blow. When the stops 8 and 9 are displaced relative to the line, perpendicular to the axis of the guides 13, the misalignment of the tensile load is adjusted: the further one stop is displaced relative to the other, the greater the misalignment of the load .. To actuate the ram 14, release the master 2. Ma The weight 2 under the action of the weight of the hammer 6 and the weight 10 rotates, and the weight 10 rushes down and along the rod 2. When the equilibrium position is passed, the load 10 causes a bending impact on the additional stop 11 on the cross member 7 and

creates bending shock loading of specimen 5. Mate 2 continues to move and after a specified time one side of cross member 7 strikes against stop 9. A misaligned tensile stress is created.

The load on sample 5, part of its volume is loaded with a greater tensile load than the other part of the volume (more stretched part of sample 5 is directed to the side of crossbar 7 and stop 9). Then the other side of crossbar 7 hits the stop 8, load misalignment decreases, but does not disappear, and with such an uneven increase in load tipo

shock loading by bending. Changing the location of the lugs 8 and 9 and the weight of the load 10, examine the dependence of the strength of the sample material at different values of impact bending and tensile loads at different order of application of loads, at different delays of the moments of striking and at different axial load. The adjustment of the test parameters is carried out in accordance with the conditions of the real work of the materials.

Claims (2)

1. Matrix picker for testing materials with complex shock loading, containing a frame pivotally connected to the base frame, grips for fastening the sample, one of which is fixed on the back of the titnik, cross member mounted on another grip, stops placed on the frame with the possibility of collision with the ends of the cross-bar, which is characterized by the fact that, in order to expand the operational capabilities by providing impact tests under the combined effect of impact and bending, it is equipped with a load, Applicants' on the rod of the pendulum is movable along it, and an additional 1 fixed stops in the middle cross member and intended for impact with the load. 2. Koper POP.1, which is distinguished by the fact that, in order to ensure the possibility of controlling the sequence of application of tensile and bending loads and creating eccentric tension, it is equipped with circular guides mounted on the frame and cross-bar stops are installed on these guides. 4-L 0 IG Editor A. Vorovich Compiled by M. Budilovich Tehred L. Serdyukova Proofreader E. Roshko Order 3042/37 Circulation 776 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 ----- ------ "- .., .... Production and printing company, Uzhgorod, Projecto st., 4