RU5410U1 - DEVICE FOR APPLICATION AND CONTROL OF THICKNESS OF ELECTROLYTIC COATINGS - Google Patents

Abstract

A device for applying and controlling the thickness of electrolytic coatings, including a galvanic bath in which anodes and cathodes are located, a block of cathode current sensors, blocks for determining the total and average current, a duty cycle block for current pulses, including a dividing link unit and a pulse-width converter unit, a switch and a power source, characterized in that it contains a driver of a critical current value, a comparison unit, sound and light indicators of the premature end of the process, voltage voltage in frequency, counting mechanism, coating thickness gauge, indication unit, sound and light indicators of the end of the process, in the duty cycle unit of current pulses connected to the cathodes, a unit of comparison devices is included, the input of which is connected to the driver of the current coefficient, the output of the total determination unit the current is connected to a comparison unit, the input of which is connected to a critical current value setting device, and the outputs are connected to a switch, sound and light indicators of the premature end of the process, The output of the average current determination unit is connected to a voltage-to-frequency converter connected to a counting mechanism, the other input of which is connected to the coating thickness gauge, and the output to the display unit, which has an output to the switch, sound and light indicators of the end of the process.

Description

DEVICE FOR APPLICATION AND CONTROL OF THICKNESS OF ELECTROLYTIC COATINGS

The useful model belongs to the field of galvanic production and can be used to improve uniformity and automatically control the thickness of coatings during its application.

A device for galvanic deposition with a control of the coating thickness, comprising a plating bath, a current sensor unit, a current density stabilizer, a voltage signal to frequency converter, an electrolyte temperature sensor signal converter, a counting mechanism, a contact block with a dispenser, a temporary integrator comprising a counting pulse generator, frequency divider and electronic meter, display unit, coating thickness gauge, sound and light indicators 1. A disadvantage of the known device is low uniformity of coatings.

The closest in technical essence and the achieved effect is a device for electrolytic coating containing a galvanic bath, a cathode, an anode in the form of electrically isolated from each other sites, current density sensors, a unit for determining the average current density, a switch, a power source, the duty cycle unit of the currents of the anode sites consisting of series-connected node of dividing links and node of pulse-width converters, and the inputs of the duty cycle unit of the currents of the anode sites connected the sensors of the current density and the block determining the average current density, and the outputs - the switch device 2. The disadvantages of this process are the reduction in performance, since with a sharp decrease of the current density at one of the anode pads Vhvidu

IPC with 25 D 21/12 i for any reason, the current duty cycle unit regulates, reducing the total currents across other anode sites and thereby the coating deposition rate, low uniformity of coatings, since the values of currents flowing through individual cathodes are not taken into account, and - lack of control of the thickness of the coating during its application. The objectives of the utility model are to increase the productivity of the deposition process, increase the uniformity and measure the thickness of galvanic coatings during its deposition. The objectives are achieved in that in a device containing a galvanic bath in which anodes and cathodes are located, a block of cathode current sensors, blocks for determining the total and average current,) fna & - ii ny 6C.fi) (fp ofAO3oe.e / ySe / e duty cycle unit of current pulses, switch and power supply, in; unlike the prototype, a critical current setting driver ZE1, a comparison unit, a sound and light signal, and a premature end of the process, a voltage-to-frequency converter, a counting mechanism, a coating thickness adjuster, an ind cations, sound and light indicators of the end of the process, the current pulse duty cycle unit connected to the cathodes, a unit of comparison devices is turned on, the input of which is connected to a current coefficient driver, the output of the total current determination unit is connected to a comparison unit, whose input is connected to a critical current value driver and the outputs are with a switch, sound and light f :( premature end of the process, the output of the average current determination unit is connected to the voltage-to-frequency converter, connect a connected / with a counting mechanism, the other input of which is connected to the coating thickness gauge, and the output to the display unit, which has an output to the switch, sound and light indicators of the end of the process. 6i: t fp4Q uji / u aze .... f.

The essence of the utility model is illustrated by the block diagram of the proposed device, shown in the figure.

The device comprises stationary anodes 1 in a galvanic bath 2, a cathode current sensor block 3 connected to a current pulse duty cycle unit 4, the input of which is connected to an average current determining unit 5, and the outputs are connected to a switch 6 connected to cathodes located in a galvanic bath 2 7, each of which corresponds to a sensor in the block of current sensors of the cathodes 3, and connected to the block for determining the average current 5, as well as to the output terminal of the power source 8, the second terminal of which is connected to the anodes 1 through bl ok determine the total current 9. The duty cycle unit for current pulses 4 consists of series-connected node of dividing links 10, a block of comparing devices 11, the other input of which is connected to a master device 12, and a node of pulse-width converters 13. The input of the block for determining the average current 5 is also connected to the block determination of the total current 1 9,

connected to the comparison unit 14, the input of which is connected to the critical value of the current setting device .р 15, and the outputs -

switch 6, with sound 16 and light 17 of the premature end of the process. The output of the unit for determining the average current 5 is connected to a voltage transducer to a frequency 18 connected / to the counting mechanism 19, the other input of which is connected to the coating thickness adjuster 20, and the output to the display unit 21, having} -} output to the switch 6, sound 22 and luminous 23 indicators of the end of the process.

The device operates as follows.

The output signals from the unit of current sensors 3 and the unit for determining the average current 5 are fed to the input of the duty cycle unit of the current pulses 4 node of the dividing links 10, the output signals of this node represent

the ratio of local values of currents. to average current / and

enter the block of comparison devices 11, where they are compared with a given critical value of the current coefficient K,

current coefficient determined by the master device 12. If / ,, then the cathode is switched off by switch 6 and

applying a signal about the number of working cathodes to the average current determination unit 9, the value of which is obtained by dividing the total current value,

coming from the unit for determining the total current 14, the number of working cathodes. If /, / 7 K, io converted by the node of the pulse-width converters 13 signals in proportional to the duration of the current pulses, pass to the input of the switch 6, designed for separate switching in accordance with the duration of the current pulses of the cathodes 7, included together with the power source 8 and anodes 1 into separate electrical circuits. Also, the average current determination unit is connected to

signal transformer and with a unit for determining the total current, the input of which is connected to the unit for comparing currents. If 1, then happens

01: switch 6 switches on all power circuits, accompanied by sound and light alarms. If, then the signal goes to

a voltage to frequency converter 18, the output signal of which is supplied in the form of current pulses to the counting mechanism 19. In this case, the indicating unit 21 registers the current value of the coating thickness on a digital display. Before the start of the process, a number equal to the difference in the total capacity of the counting mechanism 19 with the calculated number of impulses providing a given coating thickness is introduced into the counting mechanism 19. After the estimated number of pulses appears, the counting mechanism 19 overflows and the display unit 21 provides a signal for the end of the electrodeposition process, which arrives at the sound 22 and light 23 indicators, and all power supply circuits 6 are turned off by the switch 6.

Such a device allows to increase the uniformity of coatings due to the process with the supply of current pulses of various durations to various cathodes. In addition, the cathodes are automatically turned off, the deposition rate on which for any reason is significantly lower than the average, and the entire electrodeposition process stops when the number of cathodes is turned off more than the specified one or when the specified coating thickness is reached.

Sources of information

1.A.S. 751844 USSR, MKI C 25 D 21/12. Device for controlling the consumption of precious metals in a plating bath / V.K. Revunov, V.A. Nugis, V.I. Brazhnikov // Discovery. Inventions.-1980. No. 28.

2.A.S. 616349 USSR, mt C 25 D 21/12. Device for electrolytic coating / K.V. Egorov, A.K. Zhurba, A.I. Kuznetsov, etc. // Discovery. Inventions .-- 1979. No. 27.

Claims (1)

A device for applying and controlling the thickness of electrolytic coatings, including a galvanic bath in which anodes and cathodes are located, a block of cathode current sensors, blocks for determining the total and average current, a duty cycle block for current pulses, including a dividing link unit and a pulse-width converter unit, a switch and a power source, characterized in that it contains a driver of a critical current value, a comparison unit, sound and light indicators of the premature end of the process, voltage voltage in frequency, counting mechanism, coating thickness gauge, indication unit, sound and light indicators of the end of the process, in the duty cycle unit of current pulses connected to the cathodes, a unit of comparison devices is included, the input of which is connected to the driver of the current coefficient, the output of the total determination unit the current is connected to a comparison unit, the input of which is connected to a critical current value setting device, and the outputs are connected to a switch, sound and light indicators of the premature end of the process, The output of the average current determination unit is connected to a voltage-to-frequency converter connected to a counting mechanism, the other input of which is connected to the coating thickness gauge, and the output to the display unit, which has an output to the switch, sound and light indicators of the end of the process.