CN87107414A

CN87107414A - Electroplating technology and parameter microcomputer control system

Info

Publication number: CN87107414A
Application number: CN 87107414
Authority: CN
Inventors: 陈本孝; 杨国清
Original assignee: Huazhong College Of Technology
Current assignee: Huazhong College Of Technology
Priority date: 1987-04-14
Filing date: 1987-04-14
Publication date: 1988-09-14

Abstract

The present invention is about the microcomputer control system of electroplating technology flow process and parameter.It is based on the z80 microcomputer, and disposes necessary device and form.The operating command of system, station signal and parameter signal are sent into through passage separately and are sent corresponding control after opu handles during work, thereby provide the kinds of processes flow process to system, plating piece is implemented automatic water jetting handle, realize electroplating current, rush current, bath temperature is controlled automatically and brightening agent adds automatically.Therefore, can satisfy the needs of various plating pieces to greatest extent, versatility is very strong.Simultaneously, the automatic control of several parameters, particularly rush current can improve the quality of plating piece, particularly complicated plating piece.

Description

The invention belongs to the microcomputer control field

At present domestic only several microcomputer control are electroplated production line and all are only limited to technical process, do not realize that automatic water jetting is handled and parameter is controlled automatically; Abroad " shilling plating is shallow automatically " (the SCHERING GALVANO TECHNIK) as West Germany Schilling company (SCHERING) is the motion with a single armed driving of INTER 8085 microcomputer control, and realizes the automatic control of parameters such as automatic water jetting, electroplating current, bath temperature, brightening agent (another independent system control outside the pH value electricity microcomputer).This system fails to realize the moving automatically control of rush current, and technical process is single, to the narrow application range (pcb plating line) of workpiece.The present invention moves with both arms of Z80 microcomputer control (two colluding) driving, realize the kinds of processes flow process, applicable to size, different workpiece, and realized the automatic control of rush current, this is to handle the needed a kind of special parameter of some surface shape convexo-concave workpiece.Therefore the present invention can reach following purpose:

1. reasonably control electroplating parameter, particularly rush current, to solve the quality problems of plating piece, particularly complicated plating piece.

2. provide needed multiple electroplating technology flow process of different plating pieces and parameter, to strengthen the versatility of Controlling System.

The present invention is applicable to copper, nickel, chromium electroplating assembly line, plating piece comprises umbrella bar and sundries two big classes, can realize 8 kinds of technical process controls, and every kind of flow process can be carried out 8 kinds of electroplating currents again, and the selection of hitting current parameters in a state of excitement, every kind of rush current also has 4 kinds of different time length.Technical process, electroplating current, rush current can be combined into 8 * 8 * 4=256 kind process program.The arrangement that is in line of more than 30 coating bath is arranged on the automation line, more than 40 horizontal station and vertical station, one two colludes driving, have in the driving three electric motor control respectively driving advancing with retreat, collude after preceding the reaching up and down of colluding about.In order to realize multiple different technical process, half step, turning movement etc. need be job-hoped, move back to driving also in relevant position except advancing, retreating, action rule complexity.In fact microcomputer is realized by three motors in the control driving the control of technical process.

The The general frame of Controlling System as shown in Figure 1, central processing unit OPU is by address bus AB data bus DB control bus C.B. and ram memory, EPROM, parallel input/output interface circuit PIO and timer/counter CTC etc. constitute a computer system, realize the function of computing and control.External input signal can be divided into two kinds of switching value and analog quantitys.Switching values such as various operating command CZ and on-the-spot station signal GW and tank liquor temperature detection signal WDR all enter computer by outside input circuit IN by PIO, electroplating current and rush current DLC then are a kind of continually varying analog quantitys, through analogue amplifier MF, be converted to digital quantity by modulus converter A/D and enter computer again, CPU carries out these input signals to send down column signal by PIO respectively through outside output interface circuit OUT after computing, the processing: driving working signal HC control electroplating technology flow process; The automatic water jetting of 7 coating baths of water spray signal PS control is handled; The lifting of 6 tank liquor temperatures of temperature signal WDC control; The electroplating current of 8 coating baths of electric current lifting signal DLS, DLJ control and the rush current of two coating baths; The automatic interpolation of 5 coating bath brightening agents of brightening agent signal GLJ control.Native system also has the counting demonstration of the driving cycle of operation, fault alarm and in-site modeling demonstration in addition.

In order to utilize the automatic control of a Z80 micro veneer machine to total system realization above-mentioned functions, we extend to four with PIO: PIO ₁-PIO ₄, and utilize relevant gating circuit to constitute outside input, output interface circuit, to solve a large amount of input signal detection and output signal control problem, its interface circuit is as shown in Figure 2.At PIO ₁In, many horizontal station signal GW of 40 on the automation line combine separately according to certain rules, respectively through rejection gate 7430 input PIO ₁7, other has 4 vertical station signals: the preceding upper and lower QSD of putting in place, the QXD of colluding, after collude the upper and lower HSD of putting in place, HXD and import PIO respectively ₁4, the excess of stroke and back trouble signal GZ, operating command OZ-such as the excess of stroke start QD, stop beating TJ and import PIO respectively before the driving ₁3.The native system workpiece divides umbrella bar and sundries two big classes, and the selection signal ZJ/SG of its sundries and umbrella bar is by PIO ₃Input all has 4 kinds of technical process to select to each workpiece, and the selection signal LC of technical process is by encoder 74LS148 input PIO ₁, the driving output signal is by PIO ₃Send, the driving HCQJ that advances is wherein arranged, driving retreats HCHT, the preceding QS that colludes, the preceding QX that colludes down, after collude HS, after collude down HX, fault alarm GZBJ.Other has PIO ₃3 outputs through the automatic water jetting PS of 7 coating baths of decoder 74138 timesharing control.When handling sundries, two nickel baths on the automation line only need 1 and put into operation, and it selects signal NI ₁/ NI ₂By PIO ₃Input.

In parameter control, 6 kinds of tank liquor temperatures are imported PIO by transmitter separately with detection signal WDB ₂, relatively send corresponding temperature control signals WDC controlled temperature magnetic valve action through CPU and standard value, to reach the purpose of temperature ascending, descending.The encoded device 74LS148 input of the selection signal DLLC of 8 kinds of current ranges PIO ₂3, the time length of 4 kinds of rush currents selects signal CLK to import PIO through 74LS148 ₃2.Native system has 8 coating bath electric currents needs control, each coating bath all is connected to a splitter for sampling, the electroplating current that current detection circuit obtains sampling, rush current signal DLC delivers to analogue amplifier MF, 8 passages by A/D converter enter computer for computer timesharing detection, OPU accesses corresponding standard value and compares with it according to selected range, then by PIO ₄Outward current rising signals DLS or electric current dropping signal DLJ control the electric current of 8 grooves respectively.

For some complex-shaped workpiece, need pass to bigger rush current in the moment that enters coating bath, and the lasting processing that enters normal electroplating current some seconds again, promptly at first require to realize the control of rush current.What require to realize rush current control in native system is to give copper plating groove and chrome-plating bath, advances to produce when workpiece is put in the way and impacts giving copper plating groove requirement driving, and the chrome-plating bath groove then requires driving to return to produce when workpiece is put in the way to impact.Obtain rush current signal speed certain station before arriving this groove according to the driving operation, simultaneously in buffer zone, open up two memories and begin ballistic mnemon as electric current, when workpiece enters coating bath, rush current just produces, and cross and detect relatively, regulate according to given rush current standard value.OTC arrives when the time length of rush current as the clock that detects electric current, and electric current descends, and workpiece just changes normal plating current processing over to.Rush current control signal DLS(liter), DLJ(falls) by PIO ₄Output.

In order to increase the luminance brightness of plating piece, need according to the size of workpiece current sinking and the length in treatment time, in three sour copper plating grooves and two nickel baths, regularly add certain brightening agent respectively, by PIO ₂And PIO ₃Output signal GTJ drives the action of brightening agent magnetic valve by external interface circuit.We adjust each time of opening of valve, and to fix its addition, current draw is big more in the groove, and it is short more then to add the required interlude of brightening agent, otherwise pitch time is long more.The foundation that computer is handled electric current, the laggard line data of time detecting is: the product of electric current and time, i.e. thousand ampere-hours.

The invention belongs in copper, nickel, the chromium electroplating assembly line, make complicated Automation of Manufacturing Process, not only improved labor condition, alleviate working strength of workers, and can improve the quality of products, energy efficient, material consumption, and joint use, highly versatile can produce remarkable economic efficiency.

Claims

1, in electroplating technology flow process and parameter microcomputer control system, comprises electroplating technology and parameter computer control device.This device is that the necessary device of basis and configuration is formed with the microcomputer, it is characterized in that:

(1) for strengthening its versatility, need to add following device:

A, central processing unit z80 opu: as information processing and the transmission between parallel input/output interface circuit plo, memory RAM, FPROM, Timer GTC and the modulus converter A/D;

B, parallel input/output interface circuit plo: as the transmission of input/output information;

C, scratch pad memory FPROM: as the sequence of control and the desired parameters standard value of preserving Controlling System;

D, deposit side device RAM at random: as temporary required measuring parameter;

E, modulus converter A/D: be used for detected current analog amount is converted to digital quantity, and send CpU control;

F, rejection gate 7430: handle with the input of doing the station signal;

G, encoder 74LS148: select with the input of doing technical process, current range;

H, decoder 74138: as coating bath automatic water jetting output control;

I, operational amplifier LM324: be used for the current analog amount of will be gathered and number amplify, deliver to A/D again and handle.

(2), in the time of need carrying out rush current control for the complicated plating quality of raising, also increase following device:

A, modulus converter A/D: the rush current analog quantity that is used for gathering is converted to the digital quantity amount, and send CPU to handle;

B, timer/counter CTC: make timer and use;

C, encoder 74LS148: the input as the impact current duration is selected.

2, electroplating technology flow process according to claim 1 and parameter computer control device, it is characterized in that total system is concentrated four PIO by an expansion micro veneer machine control, all among the sequence of control write-once EPROM, call for the selection of technical process and parameter.