SU1585710A1 - Arrangement for testing specimens for twisting - Google Patents

Abstract

The invention relates to a testing technique and can be used for torsion tests. The purpose of the invention is to expand the functionality. The device includes a housing 2 in which cylinder 4 is mounted and cup 5 and drum 6 aligned with it. Screw 7 is mounted in cylinder 4 and connected with a reciprocating mechanism, kinematically interacting with nut 11 fixed to drum 6. fittings 16, 17 with a container for the medium. The cylindrical sample 22 of the film material is secured with clamp clamps 23, 24 on the glass 5 and the drum 6. When the glass 5 moves axially, the drum 6 rotates. Wednesday through the nozzles 16, 17, the medium is fed into the cavity of the glass 5 and sample 22. As a result, sample 22 is tested in a co-operative environment in torsion, shear, and stretch, which enhances the functionality of the device. 2 hp f-ly, 3 ill.

Description

The invention relates to test equipment, and in particular to devices for testing torsion samples.

The purpose of the invention is the expansion of the functionality of the device by providing tests for both torsion and tensile and shear,

Figure 1 shows a diagram of the proposed device; figure 2 is the same side view; in Fig.Z - section aa in Fig.2.

The device comprises a frame 1, on which brackets 2 are mounted with housings 3 mounted for rotation. Each cylinder 3 has a cylinder 4, coaxially to which a movable gripper with a drive for moving it and a rotary gripper with a mechanism for its rotation are placed. The movable grip is made in the form of a cup 5, turned with its open end to the cylinder 4, and the rotary grip is made in the form of a drum 6, while the cylinder 4 is rigidly mounted on the end surface of the drum 6 facing it. The axial movement of the cup 5 is made in the form of a screw 7, installed in the cylinder 4 and kinematically connected by means of a connecting nut 8 with a crank mechanism 9 of the reciprocating movement of the screw 7. The drum 6 is fixed in the housing 3 by means of a bearing 10, and the rotation mechanism of the drum 6 is made n in the form of a nut 1T fixed in the end face of the latter from the side of the cylinder 4, kinematically interacting with the screw 7- In the housing 3, a rotation limiter 12 of the drum 6 is installed, which is used to control the rotation angle of the drum 6, which is controlled by arrow 14, as well as a clamp 13 of axial movement of the glass 5 The cylinder 4 with the screw 7 located in it is sealed with a gasket 15. The fittings 16 and 17 are installed in the walls of the housing 3 and the glass 5, through which the internal cavity of the glass 5 communicates with the tank via pipelines 18 New 19 for medium and with a reserve capacity of 20 and a pressure regulator 21.

The device operates as follows.

A sample 22 of a cylindrical shape made of a film material is placed between the cup 5 and the drum 6 and fixed on the surfaces of the latter with the use of clamping clamps 23 and 24. The angle of rotation of the drum 6 and the distance between the drum 6 and the cup 5 are preliminarily set with a clamp 13. After that through the nozzle 16 into the internal cavity of the glass 5 and the sample is fed from the tank 19 through the pipe 18 medium and at the same time begin the test cycle. When the reciprocating movement of the screw 7 together with the stack 5 nom 5, the drum 6 rotates through the nut 8 due to its interaction with the screw

7. In this case, the sample 22 undergoes complex torsional, shear and tensile deformation in contact with the medium. After 10 predetermined number of cycles, the tightness of the sample 22 is determined, the medium through the nozzle 17 is diverted to the reserve tank 19, and the pressure regulator 21 creates an increased pressure in the internal cavity 15 of the glass 5 and the sample 22, by changing which the tightness of the sample 22 is judged.

To test sample 22 under conditions of inertial action of the medium, the mechanism 9, pipelines 18 are turned off and the housings 3 are sealed. After that, the latter are rotated on the axes of the brackets 2, which makes it possible to simulate operational loads from the influence of the medium.

Thus, the placement of the actuator, made in the form of a screw mounted with the possibility of reciprocating movement between the movable gripper and the rotary gripper with 30 the possibility of kinematic interaction of the screw with the rotation mechanism of the rotary gripper, made in the form of a nut, and the implementation of the grippers in the form of a bar, ban and a glass facing it with an open end 35, it makes it possible to load cylindrical specimens from film materials simultaneously by torsion, shear and fracture, expanding the function The device’s full capabilities, and the connection of the cavity of the movable glass with the capacity for the medium allows testing in the medium.

Claims (3)

Claim 45 ‘ 1. A device for testing torsion samples, comprising a bed, a movable grip mounted thereon with an axial displacement drive and a rotary 50 grip with a rotation mechanism, characterized in that, in order to expand functionality by providing both torsion and tensile and shear, it is equipped with a cylinder 55 mounted on the bed, the movable gripper is made in the form of a cup, the rotary gripper is made in the form of a drum, the grips are mounted on both sides of the cylinder aligned with it, the cylinder is closed flax on the drum, the movable grip is mounted to the cylinder end, the rotation mechanism is fixed to a drum. nuts, and the axial displacement drive is made in the form of a screw installed in the cylinder with the possibility of axial displacement and kinematic interaction with the nut. 2. Pop-up device in that it is equipped with a rotation limiter and an axial displacement lock mounted respectively on the rotary and movable grips. 3. The device according to claim 1, with the fact that, in order to ensure the possibility of testing in the medium, it is equipped with gripping grips and a rotatable housing, containers for the medium and inlet and outlet pipelines in communication with the cavity of the movable capture.