SU1532948A2 - Multichannel device for control of galvanoplastics - Google Patents

Abstract

The invention relates to automation and is intended for use in chemical process control systems of electroplating. The purpose of the invention is to increase the reliability of the device. The device contains information input block 1, processing sequence memory block 2, processing time adjustment blocks 8, control blocks 9 and setting adjustments, selectors 3 of the transport organ stopping command, sensors 6 of the transport organ and sensor 7 for the presence of products in the working environment. Improving the reliability of the device is provided by eliminating the sensors of working medium parameters and the need for selecting resistors to adjust the processing parameter of the product. 4 il.

Description

"T

The invention relates to automation and computing 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 one line and is complementary to the main author. St. By 1425721.

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

FIG. 1 shows a block diagram of the device; in fig. 2 - block diagram of the adjustment of the processing time of products; in fig. 3 is a diagram of the control unit and adjustment settings; in fig. 4 is a diagram of the switchboard that is part of the unit for adjusting the length of the treatment of products.

The device contains an information input block 1, a memory block 2 of the processing sequence, a selector 3 of the command to stop the transporting body of the products and commands to start processing the products, the first 4 and second 5 keys of the selector 3, sensors 6 and 7 of the position of the Product Transportation Authority and the availability of products in the working medium, blocks 8 for adjusting the processing time of items, blocks 9 for controlling and adjusting setpoints for adjusting the parameters for machining items.

Unit 8 consists of memory nodes 10, switch i, switch 11 current sensor 12, converter 13 current – frequency, counter 14, and comparator 15.

Block 9 consists of a pulse distributor 16, a frequency divider 17, setpoint adjusters 18, keys 19, an operational amplifier 20, a decoder 21, an adder 22, a first 23 and a second 24 groups of scale resistors and a group of decoders 25.

Switch 11 consists of a decoder 26 and switching modules 27, consisting of keys 28 and 29.

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 in the diagrams). Then, using block 1, information is entered on the product code and processing code (output 2 and 1 of block 1, respectively). But to the processing code, the memory block 2 issues signals only to those command selectors 3 that are from

P

five

0

baths to which products are treated.

After that, an up and forward command is issued (at the output 1 of the rightmost selector 3). The input circuit of this command is not shown in the diagram.

At this command, the transportation authority raises the suspension with the products from the initial position and begins to move along with the suspension forward. At the same time, it acts on position sensors 6 placed above electrolyte baths (working medium), which give signals to selector switch key 4. If there are two signals on switch 4, it produces a stop-down signal (output 2 of selector 3), by which the transport unit 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 about the presence of products in the working environment (i.e. that the suspension with the products has dropped). In the presence of signals at both inputs, key 5 outputs a signal to block 8 (output 2 of the selector 3) to begin the process of galvanic processing of products and to block 9 (input 3).

In this case, block 8 provides the required processing time with regard to the actual parameters of the working medium in the bath.

The principle of determining the required treatment time is based on the fact that the amount of a substance that forms electroplating is proportional to the amount of electricity Q passed through the electrolyte, i.e. about kq and

yy Q Kt) dt,

five

0

where I (t) is the instantaneous amount of current passing through the electrolyte;

t is the start time of processing; t, is the end time of processing;

5 - electroplating thickness;

K - coefficient of proportionality.

At the same time, I (t) substantially depends on the quality of the electrolyte (the lower its concentration, the smaller I (t) and

the more time is needed to obtain the required thickness and electroplating). It is assumed that the surface area of the processed products and the voltage in the electrolyte electrical circuit - the product is unchanged.

Block 8 works as follows.

The actual current signal from sensor 12 goes to converter 13, which is triggered by a signal from selector 3, and from converter, to counter 14, which is zeroed by a signal from selector 3. The total number of pulses received at counter 14 is output to one comparator input 15, to the second input of which a standard number of pulses is supplied, proportional to the amount of electricity, providing a quality layer of the coating. This number of pulses is stored in memory nodes 10. The number of nodes 10 is taken based on the number of product codes. The selection of the required memory node is carried out using the switch 11. The switch receives signals from block 1 about the code of processed products and from the selector 3 about the start of processing. The signal about the product code is fed to the input of the decoder 26, which selects the switching module 27 corresponding to the code of the products being processed. The signal from the decoder 26 is fed through the input of the module 27 to the input of the key 28. At its second input, a signal comes from the selector 3. In this case, the signal at the output of the key 28 occurs only if there are input signals at both inputs. The signal from the key 28 is fed to the input of the key 29, which connects the corresponding node 10 to the output of the switch. In this case, the signal corresponding to the standard number of pulses is fed to the input of the comparator 15. When the number of pulses at one input of the comparator coincides with the standard one at its other input, the comparator generates a processing end signal (output 2 of block 8). On this signal (up and forward), the products are transferred to the next bath by the transport body.

In addition, block 9 in the course of processing performs programmatic adjustment of the processing parameter (e.g., current or voltage) as follows.

.

ten

15

20

5329486

The average processing time is divided into N intervals. Accordingly, there are N controllers 18. These sensors are triggered by signals from the distribution counter 16, which receives pulses from frequency divider 17 with a controlled division factor.

The division ratio depends on the code of the products to be processed, which is transmitted to the divider from the decoder 25 (N + 1), which receives information on the code of products from block 1 (the first input of block 9). In this case, the signal from the selector 3 (input 3) sets the distribution counter 16 to the initial (zero) position. The divider 17 receives pulses proportional to the strength of the current from block 8 (input 2).

Signals corresponding to the value of setting the parameter controller in any interval of processing time 25 are fed to the adder 22. Thus, the step is controlled by adjusting the parameter in time according to a certain program embedded in the units 18.

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 22. The total signal, proportional to the setpoint, comes from the output of block 9 to the parameter controller.

The adjustment of the setpoint is carried out using a computational group of dp elements, including an operational amplifier 20, into the feedback circuit of which resistors 23 and 24 are connected, the ratings of which depend on the required multiplication factor determining the amount of correction. This coefficient depends on the code of the product, which is entered through the first input of block 9 to the decoders 21 and 25. Moreover, the number of decoders 25 is determined by the received number of intervals into which the processing time is divided.

With the help of switches 19, in each interval, one of the resistors 24 that corresponds to the products being processed is connected to the feedback circuit of the operational amplifier. This is provided by the decoders 25 AND (N), to the inputs of which is fed

thirty

35

45

50

55

information about the product code, and from the outputs, the number of which corresponds to the number of product codes, the signal is sent to the key 19 corresponding to the product being processed.

The key 19 opens when there are signals at the control inputs and connects a resistor 24, providing the required multiplication factor and ultimately the desired correction value.

Claims (1)

Claims of Invention I A multichannel device for controlling electroplating according to the authors. St. No. 1425721, distinguished by the fact that, in order to increase the reliability of the device, the second output of the device is connected to the combined second outputs of the correction blocks. The processing duration of the products, we arrive at each block of the processing duration of the products, contains a group of memory nodes, a switch, a current sensor , - current-frequency converter, a counter and a comparator, the output of which is the second output of the block, the first input is connected by the It output of the switch, and the second input is connected to the output of the counter, the reset input of which is a control input current l - frequency and the first switch control input coupled to the second inputs of the block, the count input of the counter | And the first output unit connected to the output transducer current - frequency five about 0 five five the information input of which is connected to the output of the current sensor, the second control input of the switch is connected to the first input of the unit, and the group of its information inputs to the outputs of the memory nodes, the control unit and adjustments of settings contains a distribution counter, frequency divider, setpoint settings , keys, operational amplifier, decoder, adder, first and second groups of large-scale resistors and a group of decoders, the inputs of which and the input of the decoder are connected to the first input of the unit, the outputs of the decoder through large-scale resistors your group is connected to the input of the operational amplifier, and through the scale resistors of the second group. to the information inputs of the keys, the first control inputs of which and the control inputs of the setpoint adjusters are connected to the outputs of the distributor, the reset input of which serves as the input of the unit, and the counting input connected to the output of a frequency divider, whose information input is the second input of the unit, and the control inputs connected to the outputs of the last decoder of the group, the outputs of the remaining decoders of the group are connected to the second pack Aulus yuschimi key inputs with the outputs, the output of the operational amplifier and outputs setpoints eadatchi- Cove connected to the inputs of summands of the adder, whose output; is the output of the block. .J 1 transports „top-front From 5 From 8 i i § j Fm.5 Oh oh  Ogkd Fm.Ch