SU139133A1 - Load Gauge with Chart Apparatus to Static Testing Machines - Google Patents

Description

SILICON EQUIPMENT WITH DIAGRAM APPARATUS FOR STATIC TESTING MACHINES

Load-measuring devices with a chart apparatus for static testing machines are known, made in the form of a measurement system for the load applied to a sample and a system for measuring its strain.

In the described device for increasing the accuracy, the load measurement system is made in the form of a circular compensation compensator with a slider and a pointing arrow on the same axis, inserted by two paired electric motors through a worm gear. The sample strain measurement system is made in the form of a coupled inductive sensor and a compensation sensor, the measles of which is moved by means of a lever transmission associated with a roller, which rolls along a helical thread made along a drum. This system can also be made in the form of a selsyn-sensor, associated with the active seizure of the machine, and a selsyn-receiver, associated with the drum drive of a diagram apparatus, connected by a transformer circuit.

FIG. 1 shows a testing machine with a force-measuring device; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. 2; in fig. 4 shows a section along BB in FIG. one.

A load device with a chart machine for static testing machines consists of a body /, followed by

load measurement systems, tracking system for measuring the deformation of the sample 2. of the diagram apparatus 3 and the control panel 4.

The unbalance voltage of the bridge wire resistance sensors is applied to the error amplifier of the load sensing system. The input of the same amplifier receives the voltage from the reichord 5 compensation. The voltage from the output of the amplifier feeds two paired electric motors 6, which through a worm gear 7 drives the slider 8 of the reochord 5 and the carriage 9 of the chart unit 3. Together with the slider m 8, the pointing arrow JO rotates on one axis 11 s. by him. Control arrow / 1 fixes maximum load.

To measure the deformation of the sample 2 i, dual inductive sensors 13 are used, hung on it and connected in series to eliminate the effect of bending of the sample. The sensor cores are moved by a lever transmission associated with mounting prisms. The core of the compensating sensor of the strain measurement system is moved by a lever system connecting it with the roller 1-4. kits on iuiii with their cutting 15 of the drum 16. whose rotational movement is thus transformed into a translational movement of gray and chique. The direction and speed of rotation of the drum 16 are determined by mutual fielding and the speed of movement of the compensation cores and working sensors.

For measuring and recording the deformation of the sample 2, the selsyn-sensor 17, a 1-pinion-rack-and-pinion gear with a gripper of the testing machine 18, and the selsyn-receiver 19 connected to the drive 20 of the drum 16 can be used. Both selsynes are connected to each other via trans1 ) ormatorny scheme. The output of the selsyn 19 is fed to the input of the error amplifier of the deformation measurement system. At the output of the amplifier, an electric motor 2 / is turned on, which causes the rotary drum 16, which by gear 22 is connected to the rosyna 19 rotor. Thus, the direction and speed of rotation of the drum 16 are determined by the direction and speed of rotation of the selsyn 19 and the error amplifier and the electric motor .2 / -one and the same as for working with inductive sensors, and for working with selsyns.

The described device allows to reduce the inertia, increase the rigidity of the masin and ensure the recording of diagrams on a large scale.

Subject invention

. A force measuring device with a chart machine for static testing machines, made in the form of a load measurement system applied to the sample, and a system for measuring its deformation, characterized in that, in order to improve the accuracy, the load measurement system is made in the form of a circular compensation rheochord with a slide and indicating an arrow on one axis rotated by two-paired electric motors through a worm gear, and the strain measurement system is made either as a paired inductive sensor and A pickup sensor, the bore of which is moved using a lever transmission associated with a roller, rolled along a screw thread, made along the drum generator, or as a selsyn sensor associated with an active machine grab, and a selsyn receiver associated with drum driven diagram apparatus connected by a transformer circuit.

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