SU1650795A1 - Method of automatic adjustment of electrolyte composition in electroplating baths - Google Patents

Abstract

The invention relates to electroplating and can be used to control the technological processes in the baths of galvano line. The purpose of the invention is to improve the accuracy of adjustment when processing products of various sizes by determining the current values of the concentration of electrolyte components. passed through the bath, the calculation based on the information obtained current concentration of electrolyte components, a comparison of the current concentration radios with predetermined allowable values, electrolyte correction in case the current concentration value is less than the allowable one, measures the area of products on each suspension, multiplies the area value by the specific electrolyte entrainment and recalculates the current concentration value of electrolyte components. The proposed method allows timely adjustment of the solution, which ensures high-quality coatings. 1 il. 45 e

Description

The invention relates to electroplating and can be used to control electrochemical processes in baths of electroplating lines.

The purpose of the invention is to improve the accuracy of adjustment when processing products of various areas by determining the current values of the concentration of electrolyte components.

The drawing shows a structure diagram of a device that implements the proposed method.

The device contains an electroplating bath 1, an electric power supply source 2 for the bath, an electroplating bath current sensor 3, a device 4 for measuring the area of products entering processing, analog-digital converters 5, a bath loading sensor 6, a discrete signal input device 7, an operator console 8, Computer 9. digital-to-analog converters 10 and metering devices 11

The output of the area measurement device 4 is connected to the input of the first analog-to-digital converter 5, the output of the current sensor 3 to the input of the second analog-digital converter 5, the output of the bath loading sensors to the input of the discrete signal input device 7. The outputs of analog-to-digital converters 5, the device 7 input discrete signals, remote control 8 is connected to the inputs of the computer 9, the outputs of which

ABOUT

sl o VI th

connected to the inputs of digital to analog converters 10. The outputs of digital to analog converters 10 are connected to the inputs of the metering devices 11.

The device works as follows.

At the beginning of the line, the operator from the console 8 enters into the computer 9 information about the initial concentration of the electrolyte components obtained during laboratory analysis.

The products to be galvanized are loaded into the electroplating bath 1. At the same time, electric current flows from the power source 2 through the current sensor 3 and the electroplating bath 1. From the output of the sensor 3 current through analog-to-digital Converter 5 in the computer 9 receives a signal proportional to the value of the current in the bath.

When the product is loaded into the bath, the sensor 6 of the bath loading is triggered and the area of the product received for processing by device 4 is measured. Information from sensor 6 and device 4 is fed through appropriate converters to the inputs of the computer 9.

The computer 9 performs the calculation of the current concentration of the electrolyte components by the formula

Cij Ci-ij-AJ-Qi-1 d-i j-y Si.

, 2N; j 1,2 ..., P,

where Ci, j is the current concentration of the j-ro component of the electrolyte after the i-th load of the bath product;

Co is the initial concentration of the j-ro component of the electrolyte;

V is the volume of electrolyte in the bath;

AJ is the electrochemical equivalent;

QI is the amount of electricity that has passed through the bath, taking into account the current efficiency since the 1st load of the bath by the products;

Y is the specific electrolyte ablation per unit area of the product;

Si is the area of the product received for processing at the 1st load;

N is the load number, after which the j-ro component of the electrolyte solution is adjusted;

P is the number of components in the solution.

The amount of electricity passed through the bath is determined by the expression

 In-Ar.

n 1

where tj is the current output;

In is the current value of current measured by sensor 3;

At - polling interval sensor 3 current.

In this case, the known values of V, AJ, Y, /, Dg, are previously entered into the memory of the computer 9.

Next, the computer 9 compares the calculated value of the current concentration Su of the J-th component with the predetermined allowable value of St.). In case the current value becomes less than acceptable for the j-ro component, then the computer 9 through the j-th digital-analog converter 10

outputs a signal to the dosing device 11 j-ro component.

After that, the metering device 11 doses the j-th component of the electrolyte in the bath, after which its concentration becomes

equal initial coj.

Compared with the prototype, the invention improves the accuracy of calculating the current concentration of electrolyte components by more accurately accounting for the amount of electrolyte carried in electroplating baths.

Claims (1)

The invention The method of automatically adjusting the composition of the electrolyte in the baths of the electroplating line, including the input of information by the operator about the initial concentration of electrolyte components, measuring the current in the bath and the number of suspensions with products passed through the bath, calculation based on received information of the current concentration of the electrolyte components, comparing the current concentration with the predetermined permissible values, adjusting the electrolyte in case the current the concentration value is less than the allowable one, characterized in that. In order to improve the accuracy of adjustments when processing products of various areas by determining the current values of the electrolyte component concentration, the area of the products on each suspension is measured, the specific electrolyte entrainment value is multiplied by the area value, and the current concentration value of the electrolyte components is calculated.