Summary: According to the process flow and control requirements of the simple line semi-automatic brick machine, combined with the on-site control process requirements, the hardware configuration and software control process are analyzed, and a set of control system based on S7-200 SMART is designed. After testing in actual operation, the control system works stably, has high production efficiency, and meets the requirements of the control process. In the process of producing bricks, the QT10 brick machine is different from the traditional craft of kiln-making bricks. It is formed by vibration and pressure and does not require firing. Mainly use fly ash, river sand, sea sand, mountain sand, slag, slag, stone powder, cinder, coal gangue, tailings slag, chemical slag, etc. as the main raw materials to add a certain proportion of cement or white ash and other cementing materials to press the bricks forming. According to different molds, the shapes that can be pressed are standard bricks, porous bricks, blind-hole bricks, hollow bricks, pavement bricks and bricks with special needs; according to the later maintenance process, it can be divided into natural curing non-burning bricks and autoclaved curing bricks ( Autoclaved brick) and so on. It is an environmentally friendly wall material processing equipment that is in line with the national industrial policy and the national reform of new wall materials. The equipment is mainly composed of the frame of the forming machine, the pressing head, the material car, the feeding mechanism, the vibration table, the mold frame, the connecting mechanism, the hydraulic control system, the electric control cabinet, etc. The appearance of the equipment is shown in the figure. Equipment technical parameters 1. The total power is 31KW; 2. Molding cycle: 15-18 seconds; 3. Output block/8 hours; 4. Working pressure: about 0.7Mpa; 5. Exciting force: 100KN; 6. Weight: about 10.6T; 7. Host size: 6100×3500×2950mm. Working principle: The brick-making materials are conveyed to the storage hopper of the brick machine material truck through the auxiliary equipment batching station and the mixer, and then the feeding trolley device passes through forced arch breaking and secondary mixing, and will be evenly distributed in the mold. After the pressure head and the vibration table are pressurized and vibrated. Finally, when the film is removed, the forming block is sent out by the board feeding and brick connecting mechanism. The specific process flow is as follows: Description: If you press the emergency stop button during the automatic process, it will stop immediately and exit the automatic state; press the stop button to end the current cycle and exit the automatic state; if the plate loading mechanism detects that there is no plate, it will wait until it detects that there is a plate , And then continue to automatically cycle. Start automatic conditions: the mold frame is lowered to the position, the pressure head is raised to the position, the feeding plate is retracted to the position, the material car is retracted to the position, and the plate loading mechanism detects that there is a plate. With the development and growth of some companies, many of their products have begun to be sold overseas. In order to further expand the market, the electrical components used in equipment are required to be well-known brands. Siemens is one of the world’s largest electronics and electrical companies. Industry, energy, medical and urban infrastructure are world leaders. The device originally used the display text and changed to the touch screen SMART 700IE, not only the operation is more convenient and intuitive, it realizes the functions that the original text can't achieve, but also makes the device as a whole to a higher level, and the design appears more intelligent and humane. At the same time, the use of Smart PLC MicroSD card also solves the inconvenience of updating the program of after-sales equipment. Considering all aspects, the original control system of Xinje PLC+Xinje text display is replaced with the control system of Siemens S7-200 SMART PLC ST60+SMART 700IE. The signal distribution table is shown in Table 1 below. Table 1 The part of the PLC program is shown in the figure below: The program design uses structured programming, which is divided into initialization, manual part, automatic part, flow pressure control, data processing, output and other parts. The initialization part completes the power-on reset of some parameters; the manual and automatic parts deal with the manual and Logic control in automatic state; the flow and pressure control part completes the control of the hydraulic station; the fault alarm part collects the alarm information of the brick machine; the output part directly controls the output of the PLC. Description: Structured programming is adopted, and the main program is Main The following is part of the operation interface of the touch screen: The HMI screen is divided into main screen, parameter setting, status monitoring, alarm screen, etc. There are startup screens, and some important parameters of the equipment can be set through the parameter setting screen; the alarm record screen displays equipment alarm information. Part of the screen is as follows: The programming software STEP 7-MicroWIN SMART of SIMATIC S7-200 SMART is designed more beautifully and humanely than before, which is conducive to improving the work efficiency of programmers; the use of Ethernet interface allows users to only need an ordinary Ethernet cable. It can be downloaded without having to purchase some dedicated download lines, and the download speed is fast and stable. At the same time, this PLC uses an ordinary MicroSD card instead of a special micro-memory card, which relatively lowers the threshold for users and is more conducive to product promotion; the smart700IE touch screen is economical and applicable, which not only controls the cost but also guarantees The brand is accepted by the majority of customers. Of course, there are also some shortcomings such as: The smart200 plc body controls up to three axes, and there is no corresponding positioning module, and many customers’ products have more than three axes; although this PLC has 4 high-speed counters, it is because of some high-speed counters. When sharing input points and dual-phase counting, it affects the use of other counters, and it seems that there are too few channels; the SMART 700IE touch screen has too long a boot time and low sensitivity, and many customers have responded; SIMATIC WinCC flexible 2008 programming software is too large, and the software is too large. Obtaining and installing are both inconvenient. These are not conducive to the promotion of the product, and I hope it can be improved. Led Floor Panels,Led Dance Floor Panel,48W Led Light Panel,Floor White Uplight Panel Led Kindwin Technology (H.K.) Limited , https://www.szktlled.com
