SU751733A1 - Jigging hopper-type loading arrangement - Google Patents

Description

one

The invention relates to the field of mechanical engineering and can be used to feed piece blanks into a treatment zone.

A vibratory loading bunker device is known, which is intended for stabilizing the amplitude of oscillations of the bunker and changing the mass of the load and the network, which contains a buiker, an electromagnet with a coil and a feedback circuit 1.

The device has a non-linear relationship between the change in inductive resistance of an electromagnet and the change in mass loading, which leads to a decrease in i5 performance due to the deterioration in the quality of amplitude stabilization of the oscillating bunker.

It is also known vibratory hopper loading device, containing can1, its buoyer 20ker, electromagite with a coil and day feedback 2.

The disadvantages of this device are the presence of gaps in the kinematic gears, the inertia of the moving parts of the feedback circuit, and the vibrating probe, which degrades the quality of stabilization and also leads to a decrease in performance. In addition, the large size and new requirements for vibration insulation of onpinex mx 30

surfaces limit its use.

The aim of the invention is to improve the performance of an in-loading device.

The goal is achieved by the introduction of a conversion and conversion unit, a comparison circuit and a thyristor, and a uniform plate is fixed on the bunker, at the free end of which a load is fixed, and on the lateral planes there are reinforced strain gauges connected in a bridge circuit, and the measuring bridge is diagonal The circuits are connected to the input of an amplifier-transforming unit, the output of which is connected to a circuit connected to a thyristor control circuit connected in series with an electromagnet coil.

Pa figs. 1 shows the device, a general view; in fig. 2 - electrical circuit diagram.

Vibrating loading hopper device contains a hopper 1, an electromagnet with a coil 2, an elastic plate 3 with a load 4, cantilever attached to the bunker. The elastic of the plastic 3 is protected by the casing 5. The lateral planes of the elastic plastic are fixed to the resistance strain gages 6, the conclusions of which are connected to the unit equal to 7, where

all the elements of the electrical circuit are mounted, in addition, the electromagnet coils and strain gauges. The strain gauges 6, together with the balancing potentiometer and the resistor RS, form a bridge, the measuring diagonal of which is connected to the input of the amplifier and conversion unit consisting of the amplifier Ud and the average connector, but built on the base of the amplifier Uu together with the two-terminal diode rectifier Dz separating capacitance Ci2 and filter chain Ri3-Ci4. The output of an amplifier-conversion unit is connected to a comparison circuit made on a potentiometer Ris. The output of the comparison circuit is connected to the control circuit of the D16 thyristor connected in series with the coil of the electromagnet 2. The control circuit of the D16 thyristor consists of Ti7 and TIS transistors, Tao zener diode, CZQ capacitor, resistors and potentiometer RzT. Pete bridge circuit and amplifying and converting unit is performed by stabilizirovaiiogo istochiika DC voltage consisting of a step-down transformer Tpzs, dvuhpoluneriodiogo rectifier diode D29, electrolytic capacitors SZO, Sz zener diode Dz2, transistor TSS and -Rsi resistor. The device works as follows.

When the device is connected to the network, the actual value of the voltage on the coil of the electromagnet 2 is determined by the delay time of the pulse opening the thyristor D16. The delay time of the imiuls relative to the onset of the irion-period is determined by the charge time of the co-capacitor, which is the ioriotational collector current of the Ti7 transistor. The collector current of the Ti7 transistor depends on the magnitude of the feedback voltage taken from the Ri5 potentiometer. When the potentiometer i5 is fixed through the coil of electromagnet 2 and the current flows, the bunker 2 oscillates with onredelineoy amplitude. At the same time, the oscillations of the bunker 1 are transferred to the load 4, closed on the free shell of the elastic plate 3. The oscillations of the elastic elastic 3 cause deformation of the strain gauges 6, and a change in teasing of the resistors leads to the generation of voltage on the measuring diagonal of the bridge, the force, the force, the force, the force, the force, the force, the force, the force, the force, and a constant current with the help of an amplifier-transformer unit. The feedback feedback removed from the slider of the potentiometer 15 has a well-defined value corresponding to the amity of the hopper oscillations. When the loading mass of the vibrating loading bunker device changes, the oscillation amplitude of the hopper, for example, decreases. At the same time, the magnitude of the nanowl removed from the slider of the potentiometer is also reduced.

15, this leads to an increase in the collector current of the transistor Tn, the charge time of the capacitor decreases, and the effective value of the voltage on the coil of the electromagnet 2 increases, i.e., automatic stabilization of the oscillation of the bunker 1 is absorbed.

The use of the device makes it possible to significantly increase the productivity of vibrating loading hopper devices due to an increase in the allowable loading masses, which increases the time of continuous operation.

Claims (2)

1. USSR author's certificate JY 482274, cl. At 23Q 7/00, 1974. 2. USSR author's certificate number 201888, cl. B 23Q 7/00, 1965 (prototype). J v