SU798929A1 - Device for registering and monitoring the working of automatic forging-and-pressing machines - Google Patents

Description

one

The invention relates to equipment for metal forming and f / may be used to account for the products produced by forging and press presses.

A device for counting loaded forge-and-press machines is known, which, in addition to the sensor and the pulse counter, contains an element of detuning from the no-load load level. The device is set up with the adjustment moves of the magazine before switching it on under load.

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The disadvantage of the device is low accuracy.

The closest to the proposed technical entity is a device for counting the number of press strokes, which contains a load sensor connected by the commander at the time of the technological operation, and a pulse counter with a setting element for triggering level 2.

The drawback of the device is that they are pre-adjusted from the load of idle, which:; Essentially depends on the change in the speed of the machine,

changes in the conditions of lubrication, running-in of mechanisms, etc.

The purpose of the invention is to increase the reliability and accuracy of counting the number of loaded forging and pressing automats.

This goal is achieved due to the fact that the integrator inverting the large-scale converter, the switch and the discriminator, the drive load sensor are directly connected through the device containing the load sensor of the drive, the com- mand apparatus and the pulse counter, and to the first and second inputs of the switch, the third input of which is connected to the controller, which is connected to the first input of the integrator, the second input of which is connected to the output to mmutatora and output through the sign discriminator - with a counter.

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Fig. 1 is a functional diagram of the device; fig. 2 is a graph of potentials.

The device contains the output of the drive load sensor 1 connected to the integrator 2 via switch 3 controlled from the command device 4. The signal to the integrator 2 input comes from the drive load sensor 1 either directly or through an inverting scale converter 5. A pulse counter 6 is connected. to the output of the integrator 2 through the sign discriminator 7.

The device works as follows.

The command device 4 breaks the slave ":. the cycle of the machine into two zones. The first zone corresponds to the corner of the preparatory operations of the cycle. In this zone, the presence or absence of material, the operability of the working tool does not significantly change the drive load. The second zone is a technological operation that requires high energy, costs {stamping, bending, lashing, etc.).

During the preparatory operations of the automaton in the working cycle, the signal from the sensor 1 of the drive load is fed to the integrator 2, directly. At the moment of the shock load, the signal is fed to the input of the integrator 2 through the inverting scale converter 5.

On the graph of the potentials at the outputs of the sensor 1 load drive and inverter 2 at the beginning of the cycle there is an increase in potential at the output of the integrator 2, followed by (at the time of the shock load) its decrease. The gain of the inverting scale converter 5 is selected so that when the machine is loaded, the potential at the integrator output changes sign and the discriminator 7 passes a pulse to the counter b of pulses. There is a registration of the loaded working stroke. In the absence of a load in a working shock corresponding to the shock load zone, the reload of integrator 2 does not occur and the counting pulse is not generated. At the end of each operating cycle, the signal from the commander 4 is reset to zero the output voltage of the integrator 2.

The device maintains performance when the load changes

 , . . .

idling., since the amplitude of the load at the time of the technological operation is not compared with a predetermined value, but with the value generated in the same cycle of the automaton during the preparatory operations. The difference in the amplitudes of the signals in the techno logical zone and in the preparatory operations zone is always present when the machine is loaded and does not depend on the idle load.

The amplitudes of signals taken from the sensor are compared by integrating with opposite signs and different weights in the technologically loaded and unloaded zones.

Claims (2)

1. Authors certificate of USSR 287366,, cl. From 07 3/08, 1968. 2.-Rovinsky G.N. and .Zlotnikov S, L. Sheet-stamping mechanical presses. Engineering, 1968. s, 347 (prototype). Load stroke not load stroke 2