Design of PLC electrical control system for ceramic tile press
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Ceramic tile press is a special equipment designed and manufactured for building materials industry, which is mainly used to press building materials such as wall tiles and floor tiles. Its products have been widely used in residential, municipal, industrial buildings and other buildings, and it is one of the essential main decorative building materials in today's construction. Ceramic brick press adopts PLC electrical control system with advanced technology level in the world, hydraulic adjustment, rapid die changing and other devices and facilities, so it has a high degree of automation and can be modified very quickly when changing products. Even if the pressed products are small in batch and have special specifications, this series of hydraulic presses can still show the characteristics of high efficiency and good economic benefits.
The traditional control system is to connect all kinds of relays, contactors and their contacts with wires according to a certain logical relationship to form a control system to control all kinds of production machinery. The traditional ceramic tile press, that is, relay contactor control system, is simple and easy to understand, easy to use, low in price, and meets the control requirements within a certain range, so it has been widely used and once occupied a dominant position. However, this kind of relay contactor control has obvious shortcomings: large equipment volume, slow action speed, few functions, complicated wiring, poor universality and flexibility, which is not conducive to the upgrading of products and can not meet the production requirements, and it is in urgent need of a new technology to replace it.
The appearance of programmable controller just meets this demand. PLC is a new general automatic control device. It combines the traditional relay-contactor control technology, computer technology and communication technology, and is specially designed for industrial control. It is a necessary means to realize the automation of industrial production. Because of its high reliability, strong adaptability to working environment and extremely convenient use, it is popular and widely used in the field of automation. Now it has formed the trend of industrial control, especially the development of field bus and industrial control network has opened up a new space for automation. With the development of microprocessor technology, programmable controller has also developed rapidly, and its technology and products are becoming more and more perfect. In the future, PLC will mainly develop in the following two directions: first, it will develop in the direction of ultra-small, specialization and low price; The second is to develop in the direction of high-speed, multi-functional and distributed automation network. Fieldbus system is an international and development-oriented bus standard, which does not depend on equipment manufacturers. It is widely used in manufacturing automation, process industry automation and other fields. It has the characteristics of good openness, simple system and high reliability. Its perfect process parameter detection and intuitive man-machine interface provide great convenience for process operation and monitoring, and its remote diagnosis function is more convenient for users. Therefore, it has been widely used in industrial field, especially in ceramic industry. With the continuous development of intelligent node instruments, fieldbus will surely become the mainstream in the field of industrial process field control.
This product is the most important equipment in building ceramics industry, and its electrical control system adopts the most popular industrial control equipment-PLC. The key to the design of PLC control system is the accuracy of action and the reliability of the system. On the premise of mastering the process flow and action principle of the system, the main circuit diagram, control schematic diagram and PLC wiring diagram of the control system are designed. According to the circuit diagram, determine the type and quantity of electrical components used in the control system, and list the detailed components to verify the selected electrical components. According to the control requirements, the function diagram and ladder diagram of the system in various working modes are designed, and the ladder diagram is converted into a statement table. The common programs, ejection single step, beam single step and automatic circulation programs are mainly analyzed. Write out the operation steps and precautions of the system, and design the software and hardware protection measures for the reliable operation of the system, mainly the protection of input and output points and the methods to reduce input and output points.
abstract:
Ceramic brick press is the most important equipment in building ceramics industry. Electrical control system is an important part of ceramic brick press. Programmable logic controller is specially designed for industrial environment, which can adapt to the dusty environment on site, has strong anti-interference ability, and the control program can change flexibly with the process parameters, with strong communication function and expansibility, which is convenient for equipment transformation and can meet the needs of various ceramic tile production processes. This paper introduces the electrical control system of ceramic tile press using PLC technology. According to the requirements of electrical control, the electrical schematic diagram including main circuit and control circuit is designed, and the types and quantities of components used in it are selected and checked according to the drawings, and a detailed list of components is listed. According to the pressing curve of the system, the overall structure block diagram of the program is designed, and the processes of single-step ejection, single-step beam injection and automatic circulation are emphatically analyzed. The operation and debugging instructions, matters needing attention and hardware protection measures of system input and output are given. This system is a practical control system. Using PLC to realize the electrical control system of ceramic brick press greatly improves the stability and reliability of ceramic brick press equipment.
Key words: ceramic tile press; PLC control system; Component selection; interference protection measure
Design of PLC in electronic equipment
Control system of ceramic punching machine
Abstract: Ceramic punch plays a very important role in the field of stamping.
Electrical control system is very important for ceramic punch. As a new generation of industrial controller specially designed for industrial environment, the logic programmable controller has many advantages, such as it can adapt to the dusty environment, strong anti-interference ability, flexible change of process parameters, powerful communication function and good expansibility. All these advantages make the installation method easy to modify, thus meeting various needs in the production process of glazed tiles. This paper introduces the design of electrical control system of ceramic punch realized by PLC, and the electrical control requirements of ceramic punch. According to the electrical control requirements, the electrical schematic diagram is designed, including the main circuit and the control circuit. Select and check the type and quantity of components. It's listed. Based on the stamping curve, the overall structural framework of the program is designed, with emphasis on vertex stepping, beam stepping and automatic cycle. In addition, the blocks commonly used in the system are supplemented. This system is a practical control system. Using PLC to realize the electrical control system of ceramic punching machine greatly improves the stability and reliability of ceramic punching machine.
Key words: ceramic punching machine; Selection of PLC control system components; Anti-interference method
The first chapter is an overview.
1. 1 summary
Automatic hydraulic brick press is the most important equipment in building ceramics industry. Ceramic powder is pressed by brick press, then dried, glazed and fired, which is the daily ceramic tile. The old brick press usually adopts relay automatic control cabinet, which has some problems such as complex structure, large volume, high failure rate, poor universality and low control accuracy, which seriously affects the production efficiency and product quality of ceramic tiles. Due to the advantages of strong control function, good reliability and flexible control program with process parameters, both imported brick presses and domestic brick presses have adopted PLC control in recent years.
Hydraulic automatic brick press is the key equipment of modern wall and floor tile production line. WL 1700 hydraulic automatic brick press can meet the strict requirements of brick forming machinery for wall and floor tile production line, and continuously provide bricks that meet the quality requirements for the production line. This machine has the advantages of advanced parameters, stable performance, convenient adjustment, high degree of automation and higher production efficiency than similar presses. It is an ideal powder compaction equipment for building ceramics industry.
The main body of WL 1700 hydraulic automatic brick press is a three-beam and four-column frame structure, and the powder in the die frame is pressed by the upper piston and the movable beam. Different pressures are input to the upper part of the main cylinder through the pressurizing cylinder and the pressurizing pipeline, so that the product can be pressurized twice or three times in each working cycle, which is beneficial for users to produce high-quality semi-finished products according to their own brick process requirements. The movable beam is guided by high-precision columns, so the machine can be used for insert mold production and cover mold production. Brick demoulding is realized by an ejection mechanism driven by a hydraulic cylinder. The hydraulic motor directly drives the crank mechanism to drive the charging car to reciprocate, so as to realize the feeding and pushing of the brick blank. The hydraulic motor is controlled by electromagnetic proportional valve and rotary encoder, so that the skip can achieve different speeds at different positions. The thickness of the brick can be adjusted by turning the motor in front of the lower beam with the button. The electrical control system is controlled by programmable controller (PLC), which has high reliability and simple maintenance. All the action states of the printing machine can be observed on the touch screen.
This machine has the advantages of advanced parameters, stable performance, convenient adjustment, high degree of automation and higher production efficiency than similar presses. It is an ideal powder compaction equipment for building ceramics industry.
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