SU1174822A1 - Device for recording torsion test diagram on testing machine - Google Patents

Abstract

DEVICE FOR RECORDING DIA: GRA1 WE TEST MATERIALS TURNING; TO THE TESTING MACHINE, containing a drum with a chart tape, a drive for its rotation, means for adjusting the rotational speed of the drum and a recorder, which is characterized in that, in order to improve the quality of the recording of the diagram by way of drawing a chart by means of a way to create a way to write a chart by way of a way. rotation of the drum, a means of adjusting the speed of rotation of the drum in the form of a body having the shape of a glass with a cap, through the hole in which the drive shaft passes, resiliently cut along the a piping ring mounted in the glass and pivotally connected with it by means of a rocking rod, a screw mechanism mounted on the ring at the site of its cut for adjusting the size of the gap, a bearing mounted inside the ring eccentrically on the drive shaft. and pressing the ring to the wall of the glass, a rod with a helical groove in its middle part rigidly fixed with one end on the inner (L surface of the ring and located along its diameter, and a gear-type cylindrical gear, one of whose wheels is connected to the rod through balls located in its groove, and the other is fixed on the shaft, which is connected to the shaft of the drum using the overrunning clutch. -h 4 00

Description

one

The invention relates to testing equipment, namely, devices for recording test patterns for torsion of materials with different stiffness.

The purpose of the invention is to improve the quality of the recording of the chart by continuously adjusting the rotational speed of the drum.

FIG. 1 shows the layout of the proposed device on a testing machine; in fig. 2 is a diagram of a means for controlling the rotational speed of the drum; in fig. 3 ring with a screw mechanism.

The device comprises means for adjusting the rotational speed of the drum 1, which is housed in the housing 2 in the form of a glass 3 with a clamp 4, through an opening in which the shaft 5 of the rotational drive 6 passes, the drive 6 connected in series, the means for adjusting the rotation speed of the drum, the drum 1 itself and a recorder (not shown) mounted on the column 7 of the testing machine. The means for adjusting the rotational speed of the drum 1 is made in the form of an elastic cut ring 8 which is installed in the glass 3 and pivotally connected to it by means of a tilting rod 9, a screw mechanism 10 mounted on the ring 8 in the place of its cut to adjust the gap, a bearing 11 mounted inside the ring 8 eccentrically on the shaft 5 of the actuator 6 and pressing the ring 8 against the wall of the glass 3, the rod 12c with a screw groove 13 in its middle part rigidly fixed at one end on the inner surface An end 8 and a linear gear located along its diameter and a gear n, one of the wheels 14 of which is connected to the rod 12 through the balls 15 located in the groove 13, and the other 16 is fixed on the shaft 17 which is connected to the shaft 18 of the drum with the power of the coupling 19 free xcj.T, a.

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The device works as follows.

When the shaft 5 of the drive 6 rotates, the bearing 11 eccentrically mounted on this shaft rolls around the ring 8, pressing it against the glass 3. Since the ring 8 is pivotally connected to the glass 3 by means of the rocking rod 9, its rotation is excluded. Ring 8 reciprocates only in the radial direction. In this case, the rod 12 moves along its axis, causing the wheels 14 to rotate.

5 and 16 toothed cylindrical transmission. Next, the reciprocating rotational movement of the shaft 17, the wheel 16 is fixed on the cjustrator, with the help of the freewheel clutch 19 is converted into

0 rotational movement of the shaft 18 b-rabana.

The speed of rotation of the drum 1 is controlled by

5 screw mechanism 10 mounted on the ring 8 in place of its cut. To do this, change the size of the gap in the cut Mecie / for example, reduce it, thereby reducing

Q is the diameter of the ring 8 and increasing the amplitude of its reciprocating movement, and accordingly, increasing the speed of rotation of the drum. Increasing the size of the gap at the point of cutting the ring 8 leads to a decrease in the speed of rotation of the drum 1. The process of changing the speed of rotation of the drum 1 is continuous, since the process of changing the size of the gap at the point of cutting the ring 8 is also carried out continuously by means of a screw mechanism 10.

The invention allows, by continuously adjusting the speed of rotation of the drum, to significantly improve the quality of the recording of the test chart of materials by torsion by selecting a scale suitable for smoothing the resulting graphical dependencies.

Claims (1)

DEVICE FOR RECORDING A TESTING MATERIALS DIAGRAM: TO A TESTING MACHINE, containing _ a drum with a diagram tape, a drive for rotating it, means for controlling the rotation speed of the drum and a recorder, characterized in that, in order to improve the recording quality of the diagram by continuously adjusting the rotation speed of the drum The means for controlling the rotation speed of the drum is made in the form of a case having the form of a glass with a cover, through which a drive shaft passes, elastically cut along her ring, mounted in a glass and pivotally connected with it using a swinging rod, a screw mechanism mounted on the ring in the place of its cut to adjust the clearance, a bearing mounted eccentrically on the drive shaft inside the ring. and pressing the ring to the wall of the glass, the rod with a helical groove in its middle part, rigidly fixed at one end on the inner surface of the ring and located along its diameter, and gear; a cylindrical gear, one of the wheels of which is connected to the rod through balls located in its groove, and the other is mounted on a shaft that is connected to the drum shaft using a freewheel. pcs>