SU1537366A1 - Apparatus for checking full extraction of casting - Google Patents

Abstract

The invention relates to measurement technology and automation and can be used in various sectors of the national economy in complex automation casting under pressure. The aim of the invention is to improve the accuracy of the control. The device contains a weight measuring device 1, a null indicator 2, the input of which is connected to the output of the weight measuring device, and the output is the output of the device, the adder 3, the output of which is connected to the second input of the zero organ 2, the weight setting 4, connected to the first input of the adder 3, a memory device 5, the output of which is connected to the second input of the adder, the recording input through the short pulse shaper 6 to the output of the crystallization time setter 7, and the information input to the pressure sensor 8 of the machine 9. Niemi. The principle of operation of the device is based on determining the weight of the extracted casting and comparing it with an amount equal to the specified weight of the casting without a press residue and the weight of the press residue determined from the position of the press piston. 1 il.

Description

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The invention relates to measurement technology and automation and can be used in various sectors of the national economy, including in nuclear engineering and boiler construction with integrated automation casting under pressure, in particular in robotic casting complexes under pressure.

The aim of the invention is to improve the accuracy of the control.

The drawing shows a block diagram of the proposed device.

The device contains a weighing device 1, for example electronic scales, the output of which has the number of bits determined by the maximum weight of the casting, taking into account the required measurement accuracy, the zero-indicator 2, made for example in the form of a digital comparator on the K 561IP2 microcircuits, the first and second inputs which have the same number of bits determined by the number of output bits of the electronic balance, the number of chips is determined by the number of bits.

The first input of the null indicator 2 is connected to the output of the weighing device I, and the output is the output of the device. The device contains an adder 3 (made, for example, on an IMZ K155 chip), the output of which (containing the number of bits equal to the number of bits of the second input, the indicator zero) is connected to the second input indicator 2, the weight setting 4, for example , a pa of digital switches ПП10, the number of which is determined by the maximum weight of the casting, taking into account the required measurement accuracy. The output of the setpoint 4 (represents the outputs of the switches of the switches G1P10) is connected to the first input of the adder 3, each output of the key - to the cooi here is the discharge of the input of the sum – to 3), the inputs of the switches of the switches ПП10 1юд: to the voltage corresponding level of logical unit (not shown).

To the second input of the adder 3 served the output of the storage device 5, for example on the chips K 155 TM5 with the indicator. When this number of bits at the output of the storage device 5 is determined by the maximum weight of the press residue

The recording entry of the storage device 5 through the short pulse shaper 6, made, for example, on a K155 LAZ microcircuit, is connected to the output of the crystallizer time generator 7, performed, for example, on the VL-45 time relay.

The information input of the memory device 5 is connected to the output of the sensor 8 of the position of the press-piston of the machine 9 under pressure. The sensor TPK-15 can be used as the position sensor 8.

The device works as follows.

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Pre-calibrate the sensor 8 position of the press piston so that its output signal corresponds to the value of the weight of the press residue for a given position

press piston. Then on time setting 7

crystallization set the time of crystallization of the casting. After that, a dose of metal is poured into the machine 9 under pressure and pressed.

After the crystallization time has expired, a high potential arriving at the input of the former 6 appears at the output of the setting unit 7 of the crystallization time. This leads to the appearance at its output of a short pulse arriving at the input

records of the storage device 5. At the same time, the information on the weight Gm of the press residue for this particular pressing is recorded in the last on the front of the recording pulse. This information enters the memory 5 from the sensor 8 of the position of the press piston.

Then, the resulting casting is removed and weighed. After that, on the setting unit 4 weights, we set the GPTI value of the casting weight without the press residue, equal to the difference between the weight of the GOT.VQI cast and the weight of the press GUI recorded in the memory 5.

After that, the device is ready for operation.

After the metal is poured and pressed into the machine 9, is poured under pressure and the crystallization time ends, the unit 7 crystallization time is triggered. Its output signal is fed through the short pulse shaper 6 to the recording input of the storage device 5. At the same time, the latter records information on the weight of the press residue SSC, taking into account dosing errors and losses during metal transportation for this particular pressing. This information enters the memory 5 from the sensor 8 of the position of the press piston.

The adder 3 summarizes the signal of the storage device 5 corresponding to the weight of the GHK press residue, with the signal setpoint weight 4 corresponding to the value Go ™ of the casting weight without press residue. In this case, the output of the adder 3 shows a signal corresponding to the GOT .-. ™ value of the weight of the casting with the press residue of this pressing, pressed into the shape of the machine, fed to the second input of the null indicator 2.

After extraction, the casting (not shown) 0 falls on the weighing device 1. At the same time, on the weighing device 1, a signal is set that corresponds to the value Sotl + lk of the weight of the extracted casting, which is fed to the first input of the null indicator 2

5 In case of equality of these signals, which is possible only if the casting is completely removed from the mold, the null indicator is also triggered at its output.

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The signal allowing further operation of the machine is cast under pressure.

If the output of weighing device 1 is less than the output of the adder, what happens is. in case of incomplete extraction of the casting, when some of its parts or parts remain in shape, the output signal of the null indicator 2 is high and the further operation of the machine 9 is cast

The accuracy of determining the weight of the casting, 10 pressed into the mold, is determined by the accuracy of measuring the position of the press piston and its cross-sectional area.

The accuracy of determining the position of the press unit, the device, in comparison with the known, allows to increase the control accuracy by 1.5-2 times due to the formation of a signal corresponding to the weight of the cast, pressed into the mold, taking into account the metering error and losses during metal transportation.

Claims (1)

Invention Formula A device for controlling the completeness of the casting recovery, containing a weighing element, a weight setter and a null indicator, the first input of a null indicator connected to the weight output The piston for the TPK-15 sensor is .., - an element, and the output of the null indicator is not worse than 0.1 mm output of the device, characterized in that in order to increase the accuracy of control, Thus, with the diameter of the press-piston, an adder is entered into it, the first input n mm of the press-residue can be connected to P&- determine with accuracy no worse  0.54-10 6 m ( master output weight, and the output - with the second input of the zero-20 indicator, and a storage element The accuracy of determination of which is connected to the second input of the sum of the casting, and consequently, the control of the mat, and the recording entry of the storage of the casting during the casting of the part from the sticking element is connected through forming aluminum alloys (the specific gravity of the short impulse is set to the output - -) is for casting weighing 25 times the crystallization time, and the information input to the sensor output is 30-50 N 0.05% and 40-70 times better than comparing the press of a machine piston under pressure with known devices Thus, the device, in comparison with the known ones, makes it possible to increase the control accuracy by 1.5-2 times due to the formation of a signal corresponding to the weight of the casting, pressed into the mold, taking into account the dosing error and losses during metal transportation. Invention Formula