SU1672416A2 - Multichannel device to control electroplating - Google Patents

Abstract

The invention relates to automation and computer technology and is intended for use in chemical process control systems on multiprocess electroplating lines, in which several types of electroplating can be applied to different types of products in the same line. The purpose of the invention is to increase the efficiency of the device. The device selects the sequence of product processing, controls the movement of the product transport body with immersion of the latter into certain baths (in accordance with the type of treatment), and also produces a setpoint that changes over time according to the program to adjust the processing parameters taking into account the concentration of the processing medium and the type of products for each bath of the galvanic line, in which the coating on the product is carried out. 5 il.

Description

The invention relates to automation and computer technology, is intended for use in chemical process control systems on multiprocess electroplating lines, in which several types of electroplating can be applied to different types of products in one line, and is an improvement of the device according to the author. St. No. 1532948.

The purpose of the invention is to increase the efficiency of the device.

Fig. 1 is a general block diagram of the device; FIG. 2 is a block diagram of the adjustment of the processing time of the articles; FIG. 3 is a block diagram of a control and adjustment unit; in fig. 4 is a diagram of a switch that is part of the unit for adjusting the processing time of the items in FIG. 5;

The device contains an information input block 1, a memory block 2 of the processing sequence, a selector 3 for stopping the transporting body and commands to start processing the products, first 4 and second 5 keys of the selector 3, position sensors of the transporting body 6 and the presence of products in the working environment 7, a unit 8 for adjusting the processing time of the products, a unit 9 for controlling and adjusting installations for adjusting the parameters for processing the products and a unit 10 for adapting the standard amount of electricity.

Block 8 (FIG. 2) consists of a group of angles 11 of memory, switch 12 of current sensor 13, ToV-frequency converter 14, counter 15 and comparator 16

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Unit 9 (Fig 3) consists of a counter-distributor 17 pulses, a frequency divider 18, setters 19 of settings, keys 20, an operational amplifier 21, a decoder 22, an adder 23, first 24 and second 25 groups of large-scale resistors and decoders 26, 27 1 and 27 N

Switch 12 (FIG. 4) consists of a decoder 28 and switching modules 29 1- 29.P consisting of keys 30 and 31

Block 10 (Fig. 5) consists of a decoder 32. comparators 33, keys 34, electricity consumption setting devices 35, zero correction sensor 36, OR 37 element, switches 38 and additional memory memory nodes 39, total electricity consumption counter 40, forcing device 41 pulses, trigger 42. master oscillator 43 and counter 44

The device works as follows

A command to install the organ for transporting the products to the initial position is entered (this circuit is not shown). Then, using block 1, information is entered on the product code and processing code (2nd and 1st outputs of block 1, respectively). According to the processing code, the block 2 of the memory issues signals only to those selectors of the 3 commands that relate to the baths in which the products will be processed.

After that, an Up-Forward command is issued (at the signal at the output of the selector 3.1). The input chain of this command is not shown.

At this command, the transportation authority lifts the suspension with the products from the initial position and begins to move along with the suspension forward along the line. At the same time, it acts on position sensors 6 placed above electrolyte baths (working medium) which give signals to selector switch 4 4. If there are two signals on switch 4, it generates a stop-down signal (selector output 3), according to which the transport signal stops above the corresponding bath and lowers the suspension with the items into the bath.

In addition, the same signal is sent to key 5. The same key is signaled by the presence of products in the working environment (i.e. that the suspension with the products has dropped). If there are signals at both inputs, key 5 outputs a signal (1st output of selector 3) to start the process of galvanic processing of products to block 8 (2nd input), block 9 (3rd input) and to block 10 (2nd entrance). In this case, block 8 together with block 10 provides the required processing time with regard to the actual parameters of the working environment in the bath

The principle of determining the required processing time is based on the fact that

There is a relationship between the thickness of electroplating and the amount of electricity passed through the electrolyte Q0) p, the thickness di corresponds to the amount of electricity Qi ° 6p a fa - Q2 ° 6p diQi ° p, the amount of electricity needed to produce electroplating a certain thickness Q ° 6p varies in depending on the concentration of the electrolyte, te to get the same thickness

coatings at electrolyte concentrations Ki, 2, Kd will require respectively the amount of electricity Ch ° 6p Q2 ° 6p, .., Qd ° p, there is a relationship between the electrolyte concentration and the amount of electricity passed through the electrolyte QryM, i.e. K, corresponds to Osum K2 Q2cyM Kd-QdcyM

Out of these presuppositions, it is possible to formulate the dependence of the change

the required amount of electricity Q ° 6p to obtain a coating thickness d of the total amount of electricity passed through the electrolyte QcyM, and Qp can be divided into two components.

Obzobr and 0Dopobr where Obazobr is the amount of electricity required to obtain the required thickness of the coating when the electrolyte is just manufactured or updated to have a maximum concentration (depends on the required thickness of the coating, those processing programs), Odop ° p is the amount of electricity required additionally due to decrease in electrolyte concentration (depends on

the required thickness of the coating of the treatment program code and the total amount of electricity passed through the electrolyte, i.e Osum) Thus

   Q $ - (QcyM).

where P 1 P and P is the number of processing programs

0

Q ° p is stored in memory nodes 11, which are part of the processing time adjustment blocks, and Od ° ° in memory nodes 39, which are part of adaptation block 10 of a standard amount of electricity, with a D value for each program 1-Р 0Dop ° p that take into account D levels of electrolyte concentration, corresponding to A D values of the total energy consumption. These values are stored in the cells 35 (power consumption setting devices) included in block 10.

Block 8 operates as follows. The signal of actual current from sensor 13 is fed to converter 14, which is triggered by a signal from selector 3, and from converter to counter 15, block 9 and block 10. Counter 15 is zeroed by a signal from selector 3, and then accumulates the number of pulses proportional to the current consumption, i.e. determines the actual amount of electricity using the formula

Qcp ° 6p /; Kt) dt,

where l (t) is the current flowing through the electrolyte;

T is the time that has passed the start of treatment.

The total number of pulses arriving at the counter 15 is delivered to one input of the comparator 16, the second input of which receives the standard amount of electricity Q ° Cf. It consists of Obazobbr and Odop0 p. Since this data is fed to the input of the comparator 16 in the form of a binary-decimal code, the full code Obaz ° br consists of Obaz ° p, which fills the higher bits of the number code, and ODOp ° p, which fills the lower bits of the code.

The standard base amount of electrical energy Obase ° p is stored in nodes 11 of memory. The number of nodes 11 is taken according to the number of codes of the processing programs. The selection of the required memory node is performed using the switch 12. The switch receives signals from block 1 about the code of the processing program and from the selector 3 about the start of processing. The signal about the code of the processing program is fed to the input of the decoder 28, which selects the switching module 29 corresponding to the code of the processing program. The signal from the decoder 28 is fed through the input of the module 29 to the input of the key 31. At its second input, a signal comes from the selector 3. In this case, the signal at the output of the key 31 occurs only if there are input signals at both inputs. The signal from the key 31 is fed to the input of the key 30, which connects the corresponding node 11 to the output of the switch. In this case, the signal corresponding to the basic standard duration is fed to the input of the comparator 16, filling the higher bits of its input.

At the lower bits of the input is a comparator.

ra comes a number corresponding to n ° 6P

Ur-DOP

, from block 10. The comparator performs QCD ° 6p Qo ° 6p comparisons and definitions QCp compares the moment when

fo l (t) dt QP ° 6p.

At this moment, determined by the coincidence of the code values, the output of the processing is outputted at the outputs of the comparator (2nd output of block 8). On this signal (Upward-forward), the products are transferred to the next bath by the transportation body.

The additional amount of electricity Odop ° p is determined in block 10 as follows.

An information signal corresponding to the total amount of electricity QryM is fed from the counter 40 to the first inputs of the comparators 33 entering the comparison nodes. Counter 40 accumulates the total amount of electricity by counting the number of pulses entering

There is no input from the current-to-frequency converter of the block 8 (1st output). After the electrolyte is updated, the counter 40 is zeroed by a signal from the information input unit that is input.

Comparison nodes consist of setpoints 35 of the electricity consumption of the comparators 33 and keys 34. The number D of comparison nodes is taken according to the number of electrolyte attenuation levels taken into account, depending on the number of QcyM.

The quantity of electricity setters are given to the input of the comparator 33 Osumust. The input to the comparator 33 is given a signal corresponding to the actual

electricity Q.

The comparator has three outputs: 1 2; 1 2, 1 2; outputs and 1 2 combined and connected to the input of the key 34.

The challenge is to choose one

level d of D, which corresponds to the total amount of Osum electricity accumulated in block 40, i.e. it is required to find such a comparison node / d 17D /, in which QdyCT ', Qd-nycT.

The task is solved with the help of a blanking device consisting of a pulse former 41, a trigger 42, a master oscillator 43, a counter 44 and a decoder 32.

When a signal from block 3 arrives at the input of the pulse generator 41, it produces a pulse arriving at the input of the trigger 42 and at the input of the counter 44. A signal appears at the output of the trigger 42 and

counter 44 is reset.

By a signal from trigger 42 to the input of master oscillator 43, the latter is started and begins to emit pulses. The pulses from the output of the master oscillator is fed to the input of the counter 44,

where they accumulate. Information about the number of accumulated pulses comes from the output of the counter 44 to the input of the decoder 32. The latter sequentially sends a signal to the input of the keys 34 of the comparison nodes, starting with the comparison node having the largest number D. The output signal is output from that comparison node I in which At the input of the key 34, there is a signal from the comparator 33. This signal goes to the corresponding switch 38 and to the element OR 37.

From the output of the element OR 37, the signal arrives at the input of the trigger 42. In this case, the trigger 42 switches and ceases to send a signal to the trigger trigger 43, the output of the pulses to the counter 31 stops. If in the counter 40 the amount of electricity is O, then the signal is received at the D + 1 th output of the decoder 32. This signal will go to the zero-correction setter 36 and to the OR 37 element.

The signal from the key 34 of the selected comparison node enters the input of the switch 38. The input to the switch 38 is the processing program code coming from block 1 through the input of block 30, the switch connects to the output of block 30 the outputs of that setpoint additional electricity consumption 0Dop ° 6p, which corresponds to - this program code. The circuit of the switch 38 is completely similar to the circuit of the switch 12.

The unit 9 in the course of processing carries out the program control of the processing parameter (for example, the current or voltage) as follows.

The average processing time is divided into N intervals. Accordingly, there are N controllers 19. These controllers are triggered by signals from the distribution counter 17, which receives pulses from the frequency divider 18 with a controlled division factor.

The division ratio depends on the code of the products being processed, which is transmitted to the divider from the decoder 26 (N + 1), which receives information on the product code from block 1 (1st input of block 9). In this case, a signal from the selector 3 sets the distribution counter 17 to its initial (zero) position. The divider 18 receives pulses proportional to the strength of the current from block 8 (2nd input).

The signals corresponding to the value of the parameter setting setpoint at any time interval of processing are fed to the adder 23. Thus, the parameter is adjusted stepwise.

time according to a certain program embedded in the adjusters 19.

In addition, adjustments are made to the settings depending on the product code in each interval of the processing time. The signal of this adjustment is fed to the input of the adder 23. The total signal, proportional to the setpoint, is fed from the output of block 9 to the parameter controller.

Adjustment of the set point is carried out using a computational group of elements, including an operational amplifier 21, in the feedback circuit of which resistors 24 and 25 are connected, the ratings of which depend on the required multiplication factor determining the amount of correction. The coefficient depends on the product code, which is entered through the first input of block 9 to the decoders 22, 26 and 27. Moreover, the number of decoders 27 is determined by the received number of intervals into which the processing time is divided.

Using switches 20, in each interval, one of the resistors 25 that corresponds to the processed products is connected to the feedback circuit of the operational amplifier. This is provided by the decoder 27 (1 - N), to the inputs of which information on the product code is supplied, and from the outputs, the number which corresponds to the number of product codes, the signal is fed to a key 20 corresponding to the product being processed.

The key 20 is opened when there are signals at the control inputs and connects a resistor 25, providing the required multiplication factor and, ultimately, the required correction value.

The invention allows for more economical consumption of non-ferrous metals and energy savings due to the reduction of product delays in electroplating baths.

Claims (1)

Invention Formula Multichannel device for controlling electroplating by aut. St. No. 1532948, characterized in that. In order to improve the efficiency of the device, an adaptation power supply of the standard amount of electricity is introduced into each channel, the first input of which is connected to the first input of the unit for adjusting the processing time of products, the second input with the output of the processing unit for processing the processing time, and the third input is the zeroing input of the unit adaptation of the standard amount of electricity contains a group of memory nodes of an additional amount of electricity, the outputs of which are connected to the first information inputs to mmutators of the group, the second information inputs of which are connected to the outputs of the corresponding group comparators, the first inputs of the group comparators are connected to the outputs of the corresponding decoder bits, the second inputs through the corresponding outputs of the corresponding electricity consumption setters, the control input of each key is connected to the output of the total counter electricity consumption, the installation input of which is the third input of the adaptation unit of the normal amount of electricity, the second input of which is connected to about counting counter input total consumption of electricity, the input of the decoder is connected to the output of the pulse counter, the zero input of which is connected to the output of the pulse former and the R input of the trigger, the output of which is connected to the trigger input of the master oscillator, the output of which is connected to the counting input of the pulse counter S - the trigger input is connected to the output of the OR element, the group of inputs of which is connected to the outputs of the comparators of the group, the additional input of the element OR to the output of the senior bit of the decoder and the input of the zero-corrector, o One of which and the outputs of the switches of the group are connected to the output of the adaptation block of the standard amount of electricity Regulator setpoint On the body. tronyuri- li .- tsi fmogg-VmaG  On the body of transportation (bberh-forward) The end of the program F 1 Yy 1G.1 U.1 G2 IIP 3.7 1 g 2m J at l l l On the organ of the throne- OtRo & OZO Sttifi Z86er -6 before FIG. 2 From Ogiv At 9, at JO P P / 7 J6 at  l zo Setpoint on the meter controller Fig.E