Application of Vacuum Computer Control in Vacuum Sponge Nickel Plating Zheng Xin (Lanzhou Vacuum Equipment Co., Ltd., Lanzhou 730050, China) Application in this system.

With the development of society, the amount of batteries is increasing, and the requirements for batteries are getting higher and higher. For example, the capacity is large and small, and there is no pollution. Sponge nickel is an important material for nickel-metal hydride, nickel-cadmium, and other rechargeable batteries. The quality of the battery has a great influence on the quality of the battery. Using the vacuum magnetron sputtering method as a process for preparing the sponge nickel can solve the problem of the trace element pollution in the sponge nickel produced by the method of electroless plating or conductive coating, and the battery is improved. The number of charging times and the service life can also eliminate the environmental pollution problems caused by the original method. With huge economic and social benefits, our company has developed a domestic equipment process requirements. The manufacturing process of sponge nickel is to first plate a layer of nickel on the sponge to make the sponge conductive, and then apply a large amount of plating on the sponge. Nickel, and finally burned sponge, to get a grid of sponge nickel This equipment uses a vacuum coating method to complete the sponge conductive process. The equipment consists of a unwinding chamber, a magnetron sputtering chamber, a winding chamber, a vacuum pumping system, and an electronic control system. The substrate (sponge) that is plated is discharged from the unwinding chamber and coated by a magnetron sputtering chamber. In the final income rewinding room, in this process, the tension on the sponge is kept constant and very small. This is called a “zero-tension transmission system.” At the same time, a large amount of gas released from the sponge is immediately pumped away to maintain the necessary vacuum. The sponge should be plated with nickel on both sides and must be plated through. There must not be an unplated sponge on the sponge to ensure a certain amount of nickel, so that the resistance reaches the required conductivity of the next process. As shown, this control system is a distributed control system, that is, the vacuum system is controlled and protected by the vacuum part PLC system. The power supply part PLC system realizes the control and protection of the power system, and the transmission part computer system realizes the control of the winding system. Protection, the overall operation of the station to manage, monitor the various parts, the summary of the storage of various parts of the data and print out the benefits of doing so is that all parts work independently, can be Commissioning, part of the failure will not affect the work of other parts, the upper operator station real-time monitoring K Bu K4 oil diffusion pump; Z Bu Z3 Roots pump; X Bu X4 rotary vane pump; H1H2 spool valve pump; V1 BU V41 high vacuum valve ; V12-V42 pre-pump valve; V13-43 pre-stage valve; V14V44 electromagnetic band air release valve; V15-V25 bypass valve; V126 slide valve pump flapper valve; V17V27 spool valve pump inflation valve; VJ Bu V J3 throttling Valve; VF Bu VF4 inflatable valve vacuum system 3 target power control system This equipment target power supply system uses magnetron sputtering special power supply i This power supply bidirectional pulse output, with rapid arc extinguishing, automatic recovery, over current, over voltage, over temperature Other protection functions, each target current can be monotonous or can be used for target dual-target modulation. The target and pulse power are all conducive to sponge plating. The power control system also uses the same company's FOPLC system. The system can control the voltage of each target in real time. , current, duty cycle and various alarm signals are transmitted to the upper operating station, and the upper computer's switching command and power supply current setting values ​​are accepted in real time, and each target is controlled to output according to the set value.

24 Transmission Control System Because the sponge is easily deformed by stress, the metal mesh after magnetron sputtering is nickel plated is destroyed, so that the sponge nickel produced cannot meet the quality requirements. The drive system computer is the working platform of the system. Complete the linkage control of the servo motor and assume all the monitoring work of the system. The communication interface is connected with the host distributed control computer in the form of RS485 to realize data intercommunication. Three sets of all-digital servo driver shingHouse.Allrightsreserved, http://4 road module 4-way mold module power module parts, and can be given priority to each part of the machine control to achieve remote control and control system composition box 1 upper operator station system The equipment upper operator station system uses industrial computer, its main matching surface monitoring software and communication network Configuration software.

The upper operator station system completes the work of monitoring, status display, data storage and printing, alarm information and processing method guidance for the PLG drive system control computer of the vacuum system PLG.

22 Vacuum Control System Due to the large amount of air released from the sponge, continuous coating must be ensured. We have sufficient high-vacuum diffusion pump suction units. As shown.

The hardware of the vacuum control system uses the FOPLG system of Hollysys, which has the following features.

Modular design, small module size, compact structure, suitable for installation of medium and small-scale control systems; using WAGO card-type connection terminals, saving 75% wiring time; without any settings, the same digital module can be used as input Output; The same AI module can accept current, voltage, TGRTD and other signals, eliminating the trouble of storing a variety of spare parts; / IP communication interface, easily integrate the control system into the management network; the system can accept remote I as a Profibus master station /O data, which plays a role in control and scheduling in the network, can also be used as a slave station PLG to send process information to the master station while completing local control tasks; 3 or Step5 language programming, Ethernet, Prefbus and system configuration are all under Windows NT Completed, the application is interchangeable and easy to learn.

We have selected the following modules of the system: speed control loop and acceleration closed loop to complete the drive and control of the AC permanent magnet servo motor, and then the drive system computer through the software drive Advantech PCL832 three-axis servo controller to form the position closed loop to realize the entire tension control transmission control System composition box software system This equipment software system includes upper computer software, vacuum system control software, power system control software, transmission system control software, etc. The power system control software is mainly composed of analog reading and writing, and the transmission system control software is mainly composed of The composition of the PID adjustments written in the language is not described in detail here.

31 PC software The PC software includes communication software between the PC configuration program and the host computer and the vacuum system, the power system, and the transmission system on-line measurement system.

The man-machine interface monitoring software is used to configure various windows such as vacuum system working status, vacuum system PLC I/O port status, power system working status, various power supply parameter display, transmission system working status, transmission data display, historical report, alarm information, etc. Various kinds of information can be graphically displayed in real time, and can also be directly controlled by clicking or dragging with the mouse. The subordinate systems in the computer system can synchronously store various data and generate time, vacuum, current and voltage of each power source, duty ratio, and coating length. The report and curve computer system for data such as speed, speed, etc. can also diagnose all kinds of fault locations online and emit sound and light alarms. At the same time, the fault information report can be generated. These data can be recalled and printed at any time for analysis by production managers and adjustment of process parameters for production. All kinds of different requirements of the product application communication network configuration software to configure the lower sub-system address, data format and other communication settings data, to achieve the upper computer and the next sub-system communication. High-speed data transmission between the upper operating station and the lower sub-systems via Ethernet.

32 Vacuum System Control Software The vacuum system has more control objects (pumps, valves). For ease of operation, we have set up manual and two work tour programs to edit by function to facilitate debugging and viewing.

The vacuum control system program is edited by S5 programming software, and is divided into main program, manual program, automatic program and alarm program. The main program mainly performs program initialization, setting common conditions and calling other programs separately according to conditions. The manual program mainly completes the manual operation. Interlocking condition between each pump and valve and starting and closing under respective conditions. The vacuum simulation board shows the working status of the pump valve in real time. The automatic program is divided into four small programs, namely, the main pump heating main pump stops, the second recovery, the coating to complete the program, the program sequence as shown in this example is not only convenient to operate, but also has great flexibility. The alarm program completes the setting and processing of various alarm conditions.

I ~ | off next aw, Luo Guan Sleeve 1: open valve ~ open "vacuum w. set nw cold | ~ | pump eac vacuum program order anti-jamming measures for the computer programmable controller system, the interference problem is The problem that must be considered Because we use the target power supply is a high-frequency inverter pulse power supply, and the power is relatively large, so the interference is more serious, for this reason we have taken to place the power system part away from other control systems, while the power system The strong power part is completely isolated from the PLC system. The signal is exchanged through a special isolation interface board. The communication between the power supply part PLC system and the host operating station is transmitted through the optical fiber, and the rest is transmitted through the standard twisted pair cable. The computer system is individually well grounded. In addition, the computer module and programmable controller module that we choose are all strong anti-interference ability, and the input and output are electrically isolated. By adopting the above measures, the interference problem has been well solved and the anti-jamming performance of the computer system fully meets the requirements of the system. 5 Conclusion The sponge nickel that has been operating reliably and stably for two years has already been delivered to users. Satisfy the technical requirements of internationally renowned battery manufacturers to fill the domestic gap

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