SU1652876A1 - Wedge-type plastometer - Google Patents

Abstract

The invention relates to a technique for testing materials, in particular, devices for determining the strength properties of samples of materials at elevated temperatures. The purpose of the invention is the expansion of technological capabilities by providing changes in the kinematic law of motion of the pushers. In case 1 there is a cylindrical hinge-support 5,

Description

The invention relates to a technique for testing materials, in particular, devices for determining the strength properties of samples of materials at elevated temperatures.

The purpose of the invention is the expansion of technological capabilities by providing changes in the kinematic motion of the pushers.

The drawing shows the scheme of the proposed wedge plastometer.

The wedge plastometer includes a housing 1 with an H-shaped protrusion 2 of heat-resistant steel for accommodating sample 3, a hinge 4 housed in the housing 1, a cylindrical hinge in the form of a support 5 and a matching pin 6 attached to it at the base of the housing 1, frame 7 mounted on the support 5 can be rotated about the center, a wedge 8 mounted by means of a nut 9 on the frame 7 with the possibility of reciprocating movement and coupled along the cylindrical surface A with the hinge 4, the pusher K) mounted with the possibility of moving along the morning surface of the protrusion 2 and mating on the working surface P with the hinge 4, a heater (electric furnace) 11 mounted on the outer surface of the protrusion 2 of the housing 1 with the possibility of peremeg (using hydraulic cylinders 12 attached to the housing 1, and wedge movement drives 8 and frame rotation 7,

The drive movement of the wedge 3 is made in the form of a screw 13 installed

five

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five

Figure 7 and mating with a nut 9, a controlled clutch 14 connecting a screw 13 to a flywheel 15, and an electric motor 16 connected to the flywheel 15 via a mechanical gear 17. The rotational drive of the frame 7 is made in the form of screws 18 attached by hinges 19 frame 7, gear nuts 20 mounted in housing 1 rotatably and cooperating with screws 18, and a stepper motor 21 connected by gear 22 to gear nuts 20. The stud 23 connects housing 1 with pin 6.

The rotation of the frame 7 sets the value of the angle ft between the direction of movement of the wedge 8 and the vertical. Angle / can vary in the range: 120 ° fb 60 ° and significantly affects the kinematic law of movement of the pusher 10. The device is also equipped with a brake (not shown) fixing the position of gear 22 and so5 of the frame 7.

Plastometer works as follows.

For operation at a fixed, fixed angle value ft, the required angle A is set using a stepper motor 21, the motor 21 is switched off and the brake is applied. Then the hydraulic cylinders 12 raise the electric furnace 11, set the test sample 3 on the pusher 10 and lower the furnace 11 to the initial position. Turn on the oven 11 and heat the probe “blown sample 3 to the required temperature (system0

The cooling mechanisms of the plaster meter, as well as the sensors recording the force and movement of the pushers 10, are not rocked in the drawing). The initial position of the moving parts of the plastometer at ft 90 ° is shown in the drawing. Clutch 14 is disabled. The flywheel 1, i has the ability to rotate, while the screw 13 can be in a stationary state. The flywheel 15 is accelerated to the required rotation frequency by means of the electric motor 16 and the mechanical transmission 17. Then, a controlled clutch 14 is turned on. In this case, a rotational motion is imparted to the screw 13. The screw 13 by means of the nut 9 informs the wedge 8 forward movement along its axis. The wedge 8 through the hinge 4, using surfaces A and 1, informs the pusher-10 of the necessary kinematic law of motion in the guides of an YY-shaped protrusion 2 and deforms the sample under investigation. The resulting force through the studs 23, p 6, the hinge support 5 frame 7, closes on the wedge 8.

After deformation of the test sample 3, the screw 13 is rotated in the opposite direction with the help of the reverse of the electric motor 16. Under the action of the screw 13 and the nuts H the wedge 8 is shifted to the right, the pusher 10 and the hinge 4 are lowered under the action of its own weight. (It is possible to return the pusher K) to its original position with the help of springs or in another way). The electric furnace 11 is lifted by hydraulic cylinders 12 and the test sample 3 is removed from the plastometer. Then the cycle is repeated.

The operation of the plastometer when changing the angle j is carried out by turning on the

and by driving through a gaestr 22, nut gears 20, screws 18 and a cylindrical hinge support 5, a swinging frame 7 around the center of the support 5. Combining the translational movement of the wedge 8 along the axis of the screw 13, turning the swinging frame 7

JQ around the center of the cylindrical gaarn-support 5 expands the technological capabilities of the plastometer and allows choosing the kinematic law of the push rod 10 plenum 10 with sufficient accuracy. The stacked electric motor 21 allows you to precisely rotate the swing frame 7 at a predetermined speed.

Thus, the proposed device allows the study of plasticity of materials in the development of new technological processes.

Claims (1)

Invention Formula A wedge plastometer, comprising a housing mounted therein with the possibility of reciprocating movement of a wedge, a driving movement of a wedge, a pusher associated with a wedge intended for loading the sample, and a heater installed on the housing technological capabilities by providing changes in the kinematic law of motion of the pusher, it is equipped with a cylindrical hinge installed in the housing, with a frame mounted on the hinge with the ability to rotate around its center ra, and driven frame, with a wedge mounted on the frame plane.