• Schwahr PLC application in UV coating production bus control

    Schwahr PLC application in UV coating production bus control

    I. Introduction With the accelerated development of the concept of Industry 4.0 and smart manufacturing, informatization and big data monitoring production methods are rapidly popularizing, UV roll coating production automation is also accelerating the process transformation of the traditional roll coating industry with the advantages of high roll coating quality and high return on investment. . At this stage, most of my country's roller coating production is still dominated by single-machine equipment control. Although there is connected production, it does not have the function of joint control and debugging of the whole line, resulting in high labor intensity for workers. When equipment fails, no linkage interlock is formed. Downtime results in high equipment damage rate and high maintenance costs. In addition, factors such as changes in the human resource structure of today's society, which have led to difficulty in recruiting workers, and rising wage levels, have plagued the roller coating industry. To solve the above problems, we must consider upgrading the automation and intelligence of the roller coating line to improve production efficiency and product quality and reduce operating costs. 2. Overview In order to realize the centralized control of the UV production line and ensure the linkage and adjustment of the entire line, this plan is formulated according to user requirements. In this plan, there are a total of 15 sets of stand-alone equipment, including 2 dust collectors, 1 heavy-duty soil filling machine, 2 double-wheel coating machines, 2 double-lamp drying machines, 1 triple-lamp dryer, and 5 conveyors , 2 sanding machines. The sanding machine is a self-purchased product by the user and is included in the control scheme of this system. The sanding machine needs to provide a communication control interface for this system to control. 3. Control system and network configuration The PLC adopts the Schwahr brand and is equipped with an optional Ethernet interface. The bus communication adopts industrial Ethernet for communication. The communication protocol is MODBUS/TCP protocol. The transmission speed is fast and the control is real-time. Each stand-alone device selects the corresponding model according to the actual points and needs. PLC. In principle, the conveyor is not equipped with PLC control and must be controlled by nearby equipment.  Therefore, the PLC system of the  nearby equipment must reserve the control interface of the conveyor to reduce bus control costs. In order to improve the reliability and stability of the system, as well as data processing capabilities, communication speed, etc., this    system uses a high-end PLC as the master control PLC to process all data. The stand-alone equipment of this system is equipped with a human-machine interface for monitoring, and any stand-alone machine can     be controlled and adjusted on the spot. The total monitoring system uses a 10-inch touch screen and PLC for monitoring. It can also be configured with a cloud box (CBOX) +         large screen controller (TVBOX) + (large screen) solution to achieve centralized control. In this system, cloud box + large screen Screen     controller solution, the master control system has cloud control function, which can perform remote debugging programs, remote                  monitoring of equipment status via mobile phone and other functions. The network communication uses a 12-16 port industrial grade Ethernet switch, and the network cable uses an industrial grade shielded       Ethernet communication cable. The switch needs to be installed in a special electrical box. During on-site installation, the network cable       needs to be routed through iron pipes or independent wire troughs. Improve anti-interference ability. 4. Process control system functions (1) Routine functions of process system The bus control system has memory and recipe functions. When producing different products, the recipes of different products can be directly called. The recipes include setting speed, height and other parameters. To call the recipe, you can measure the plate thickness through the product thickness gauge at the entrance of the production line, then confirm and save the data to the corresponding formula, and then call it when producing this plate type. It has whole-line linkage, one-click start and stop. When starting, start the end equipment first, and then start the front-end equipment one by one in sequence. The order of shutdown is exactly the opposite. Avoid simultaneous start-up causing impact on the power grid.  When a faulty machine occurs, the conveying equipment of the faulty machine to the entrance must be stopped immediately, but the roller coating wheel does not stop and rises to a safe height on its own. The equipment maintains normal operation toward the exit. After the fault is reset, it automatically drops to the set value. high. Fault types are divided into conveying faults, card board faults, dimmer faults, inverter faults, limit over-limit alarms, etc. When linked, you can control the operation or non-operation (disabled) of any roll and raise it to a safe height. The UV dryer uses an electronic light source, which can infinitely adjust the light source. It runs at full power when there is a board, and runs at 30% power when there is no board in standby. The light source power can also be adjusted in real time. After fine-tuning the on-site lifting height, the data can be directly transferred to the main control PLC after being saved, and saved and memorized in the formula for easy recall next time. Install a set of material presence detection device at the entrance of the production line as a basis for system operation and standby state switching. This device also serves as a plate thickness detection alarm signal. When the plate thickness exceeds the set thickness, a switching signal is sent to The main control PLC issues an alarm and stops conveying. Install a detection device on the dryer to determine whether there is a jam in the dryer. Stop the dryer immediately to avoid fire accidents. Since the production line is long when the entire line is controlled, a three-color indicator light is installed on each machine to better monitor the operating status of the entire line, green for operation, yellow for standby, and red for failure. The background monitoring system functions include equipment operating status monitoring, fault alarm information display, one-click start and shutdown functions, output statistics, recipe setting and calling, user login and logout, etc. (2) Energy management functions The dryer of this system is equipped with an electronic dimmer. The dimmer can adjust the frequency conversion speed of the cooling fan according to the power of the light source to achieve the purpose of energy saving and consumption reduction. Each set of rollers of the roller coating machine is equipped with a paint weighing device and a gap adjustment device between the rubber wheel and the steel wheel. The weighing device can monitor the weight of the paint in real time. It has an upper limit to stop oil feeding, a lower limit to refuel, an upper limit to alarm, and a lower limit to Lower limit alarm and other functions. In addition, the amount of paint can be directly determined by adjusting the gap between the steel wheel and the rubber wheel, thereby converting the paint consumption. Each device can be equipped with a smart meter, or a smart meter can be installed on the entire line to monitor the power consumption of each shift every day, so as to monitor power-saving behavior. For forward and reverse roller equipment, the reverse roller lift automatically adjusts the lifting height according to the position of the plate to ensure that the plate does not hit the roller when it enters the reverse roller, because when the reverse roller hits the roller, the paint will pile up and fall onto the conveyor belt, affecting the equipment's performance. Hygiene and maintenance, while also reducing paint loss. (3) Equipment maintenance functions The electronic dimmer is equipped with a running time record. When the UV lamp reaches the use time, an alarm will prompt the lamp to be replaced for equipment maintenance. Use the solenoid valve that supplies oil to the roller as a timing basis to determine the usage time of each rubber roller, thereby reminding the user when to change the roller so that the equipment can be better maintained.
  • Application of safety switches and emergency stop switches in production lines

    Application of safety switches and emergency stop switches in production lines

    In recent years, the CNC machine tool industry has faced the serious issue of "shortage of skilled workers." In this regard, in order to provide solutions that make extensive use of cutting-edge technological tools such as robots, AI, and IoT, it is necessary to promote comprehensive innovation around the three pillars of automation, digitalization, and multifunctionality. SCHWAHR's interlocking devices for safety-critical components of CNC machine tools fully comply with the requirements of international safety standards. The products are fully equipped with the firmness and durability required by the use environment of CNC machine tools. In addition, in line with the automation trend of CNC machine tool peripheral equipment, we provide safety switches, emergency stop switches, safety relay modules, safety laser scanners and other products that meet new needs to promote the safety of CNC machine tools. For example, in the food and packaging machinery industry, we need to pay attention to the trends of the food industry as users. While striving to cut costs, improve efficiency, and save manpower, we are also constantly promoting technological innovation to ensure food safety and hygiene. In order to not only adhere to the basic principle of "food safety and security", but also explore new business opportunities in the food field and meet diversified consumer needs, SCHWAHR will grasp the market trend and provide high value-added and high-reliability product lines. We provide a variety of products for food and packaging machinery that comply with international mechanical safety standards in ISO/IEC specifications, such as various high-quality sensors including temperature and humidity sensors, PLC controllers and HMIs, as well as various safety switch products, etc. Offering a variety of products that help improve production efficiency and safety. SCHWAHR’s safety engineers can assist you in finding safety equipment that meets your specific application needs, please click the button on the right to contact us!
  • Hot galvanized(aluminium) production line

    Hot galvanized(aluminium) production line

    Hot galvanized(aluminium) production line The hot galvanized(aluminum) production line is a continuous hot galvanized(aluminum) unit used to produce zinc and aluminum plated steel rolls. The designed annual production capacity is 250,000 tons. The products are mainly used in the electrical industry, construction industry, agriculture and some domestic electricity industries. The unit includes a number of processes such as pre-cleaning, annealing, hot dip aluminum zinc plating, post-plating cooling, and leveling, drawing, passivation(fingerprint resistance), oil coating, winding, and surface defect inspection. It has achieved multifunctional and efficient continuous production. The hot galvanizing unit equipment is reliable and has the flexibility to handle a variety of product varieties online to adapt to changes in market requirements. It is equipped with oil coating, roll splitting and other functions in the export section, and can organize production according to user requirements.Process parameters:1, substrate material: cold rolled carbon steel, high-quality carbon steel and low alloy steel2, strip width: 600 ~ 1500 mm3, strip thickness: 0.15 ~ 3.5 mm4, steel coil outer diameter: φ 800 ~ 2000 mm5, process speed: 80 to 200 meters / minute6, energy types: electricity, natural gas, liquefied petroleum gas, gas, Steam, air pressure, etc..7, the coating state: ordinary zinc flowers, small zinc flowers, zinc flowers, light zinc flowers8, coating thickness: 50 ~ 300 g/m2(double sided)9, post-plating treatment: finishing, drawing, fingerprint resistant coating / passivation, coating Second, the composition of the unit equipment:The unit mainly includes: entrance section with two unwinding machines, entrance transverse shear, welding machine, entrance sleeve, cleaning section, stove section, zinc pot, air knife system, cooling short, flatten machine, pull and pull machine, passivation machine, export sleeve, quality inspection, oil coating machine , exit horizontal shear, exit section with two tension windings, steel coil transportation system, steel coil bundling machine and heavy machine.III. Features of equipment:1, hot galvanized(aluminum) before the removal of steel surface dirt chemical and electrolytic cleaning device.2, using a horizontal furnace, simple structure, easy to operate, easy to maintain. The preheating section is heated by the combustion exhaust gas of the direct flame heating section. Using direct flame heating can shorten the heating length and burn the residual oil on the surface of the strip. The air-combustion ratio of direct flame heater operation is less than 1.0, and it does not oxidize strip steel. The "W" type radiation tube is used in the heating and isothermal section of the radiation tube. The heat exchangers are installed in each radiation tube burner to heat the air.3, in order to control the steel tension inside the furnace and the hot-plated area, the furnace roller in the furnace is driven by a gear motor alone, the frequency conversion speed regulation system is regulated, and a hot tension roll group is set up at the rear of the stove to ensure that the steel tension is constant and the plate shape is good. The coating is distributed more evenly.4, the use of four roll leveling machine and two bending two orthopedic bending straightener, liquid operation, which is conducive to improving surface quality and improving plate shape.5, automatic winding, using cutting, cutting and sampling.6, the use of coating thickness measurement instrument can monitor the actual thickness of the coating in real time, guiding the precise adjustment of the gas knife.Using a fingerprint resistant coating roller coating machine with a fast switching device can effectively optimize the equipment layout of the process section, reduce the investment in the factory building, and obtain accurate organic or composite coatings on the strip surface.8, the control system adopts vector frequency conversion speed regulation, CPC and EPC correction, field bus and other control technologies, good human-machine interface, stable and reliable equipment
  • Catalytic Incinerator Production Line

    Catalytic Incinerator Production Line

    Catalytic Incinerator Production Line Brief Introduction of Principles of Catalytic Incineration System The system belongs to centralized heating, the heat source is from the catalytic incineration device, and through the main heat supply pipeline, the heat is delivered in several branches to the regional heat stirring section to mix with the gas from the curing furnace through the automatic heat supply control valve, and is then sprayed out from the PROP air outlet by the heat cycle fan. Each heating section has one set of PID executing mechanism to connect the automatic regulation valve for heat supply through the connecting rod, so as to control the capacity of hot air capacity to reach the temperature control purpose. Due to the application of PID control, the operating temperature of each section of the curing furnace can be controlled within ±2℃. When implementing coating operation, the organic waste gas generated in coating curing enters the catalytic incineration device through waste exhaust pipelines. The organic waste gas from the waste gas pipelines is then subject to waste gas splitting and incising and is divided into several portions, after they evenly enters the surface of the cooling and incendiary cylinders in the heating chamber, they enters the incendiary cylinder to contact with the flame and incinerate. The high-temperature waste gas generated from incineration enters the hot air stirring section through the waste exhaust fan, and after being stirred evenly with the organic waste gas, they are sent to the pre-catalysis splitting and incising device which again incises the high-temperature organic waste gas into several portions and sends it into the catalytic incineration area. Due to the addition of catalyst, the benzene, methylbenzene, xylene and acetone can react with oxygen at low temperature (220-350℃) to have spontaneous combustion and incineration and thus release heat, and the released heat depends on the concentration of oxygen and organic solvent. The high-temperature gas subject to catalytic incineration enters the heat supply pipeline after the secondary heat exchange and is distributed to each heating section to complete the whole catalytic incineration and heat supply process. Composition of Catalytic Incineration System The system is composed of waste exhaust pipeline, waste exhaust fan, catalytic incineration device, heat supply pipeline, sectional heat stirring area, PROP air outlet and curing furnace body etc.. 1. Waste exhaust pipeline: (waste exhaust opening, manual regulation valve for waste exhaust, waste exhaust branch pipe, waste exhaust mains). 2. Waste exhaust fan: the fan power is matched according to the actual conditions. 3. Catalytic incineration device: (waste gas splitting and incising and heat exchange section, incinerating and heating section, waste exhaust fan, hot air stirring section, pre-catalysis gas splitting and incising and heat exchange device, catalytic incineration section 1, catalytic incineration section 2, catalytic incineration section 3 and heat exchange section). 4. Heat supply pipeline: (heat supply mains, heat supply automatic regulation valve, heat supply branch pipe). 5. Sectional heat stirring section: (heat stirring section, heat circulating fan). 6. PROP air outlet: the outlet quantity and outlet size are matched according to the actual conditions. 7. Curing furnace body: the length is matched according to the actual conditions. Purpose The product is used to empty the incinerated waste gases of benzene, toluene, xylene and naphthalene etc. in the ferrous-printing and color-plate coatings industry, and apply the heat released thereby to the centralized heating of the drying room. Such product uses a single high-power combustion engine for centralized heating instead of multiple small-power combustion engines of the original production line, which can make full use of the organic solvent in the waste gas to burn and release heat for heat supply in the drying room on the basis of ensuring the flue gas emission to meet the environmental protection requirements. It is not only applicable to the waste gas treatment and heat energy recycling of the coating drying rooms in the industries of metal printing, color-steel plate, aluminum plate and aluminum strips etc., but also applicable to the waste gas treatment and heat energy recycling of the coating production lines of various specifications of industries of automobiles and motorcycles etc.. Characteristics 1.  High purification efficiency: mixed waste gases, even air distribution and stable temperature control improve the purification efficiency, reaching and exceeding the national standard GB16297-1996. 2. Significant energy-saving effect: it directly returns the heat generated from high-temperature incineration to the drying room for energy recycling, making the energy-saving efficiency up to 15%-35%. 3. Good safety performance: the furnace body is equipped with explosive door to release deflagration pressure, and adopts sectional micro-negative pressure combustion, with no temper. 4. Good thermal insulation performance: the system uses plug-in stainless fan and 200mm thick heat insulation layer, with less heat dissipation, and the surface temperature is less than or equal to the room temperature of +20℃. 5. High automation control degree: it completely substitutes the original temperature control in drying room, and with the one-key start, it can be subject to whole-process and full-automatic operation, and there are safety protection devices of over-temperature alarm, low-temperature alarm and flame failure alarm lights to guarantee the device in stable operation.
  • Application of Schwahr robot in automatic loading and unloading of CNC lathes

    Application of Schwahr robot in automatic loading and unloading of CNC lathes

    In the traditional manufacturing process, manual labor is almost always used for loading and unloading machine tools. This primitive operation method has disadvantages such as high labor intensity and difficulty in balancing output and quality. In the environment of "replacing machines with people", more and more mechanical processing companies are using robots for loading and unloading materials, reducing labor costs, while increasing output and quality, and enhancing the competitiveness of enterprises. The biggest advantage of articulated robots is that they are highly complementary and are not limited by the structure of machine tools. They can be used to complete loading and unloading of processes such as drilling, finishing, dynamic balancing, boring and grinding, oil removal, inspection and stamping. A domestic company specializes in processing shaft products and provides supporting services to large enterprises across the country. It recently commissioned an integrator in Nanjing to automate its original loading and unloading processes. By using the Schwahr four-axis SCARA robot, the automatic connection of CNC lathes for loading and unloading has been realized. The operating efficiency of the shaft production line has increased by 40%, saving 80% of labor costs, while improving product stability and cleanliness. Project implementation After receiving the project, the integrator first reviewed and improved the project, then used the resources of the platform's R&D team to form an online project team, and then formulated a preliminary design plan and carried out planning. With good communication, rich R&D and design experience, and efficient and highly matched process flow solutions, we quickly gained the customer's trust and quickly entered the project implementation stage. Target: Installed a robot automated production line, increasing the average daily output from 1,600 pieces/day to 2,500 pieces/day. plan: The Schwahr SCARA robot is used to complete automatic loading and unloading, and the assembly line automatically transports workpieces. The SCARA robot control system is used to realize signal interaction between the robot and the CNC machine tool; the company's independently developed and designed clamping claws are used to grab materials; multiple robots are used to share the assembly line technology to meet the needs of Production requirements. Project implementation effect 1. Labor costs are reduced, from the original 8 people to 2 people, and the original operators are changed into inspectors and administrators; 2. Improve production efficiency, compared with manual production efficiency, it has increased by 40%; 3. Improve product quality. Workpieces are transported by the assembly line, which greatly reduces the risk of workpieces being out of sequence and confusing.   4. Intelligent production, with monitoring and alarm functions such as intelligent identification of production line processing misalignment and quality control.  
  • Application of Schwahr servo system in the field of industrial automation control

    Application of Schwahr servo system in the field of industrial automation control

    Schwahr servo control system integrates the latest technological achievements in various fields such as electronic technology, computer technology, detection technology, automatic control and mechanical structure, and is a typical electromechanical integration system. Servo systems represented by CNC numerical control systems are mainly used in the field of CNC machine tools such as precision machining, while PLC, as a controlled servo system, has the characteristics of high precision and economy, and has good performance in the field of industrial automation design and transformation with general precision requirements. application prospects. Composition and principle of servo system The servo system mainly consists of three parts: servo motor, servo driver, and command mechanism. The servo motor is the actuator, which is used to achieve motion. The servo driver is the power source of the servo motor. The command mechanism sends pulses or gives speed to the servo driver. of. The host computer gives instructions to the servo, such as PLC, industrial computer, etc. The servo driver receives the instructions from the host computer and controls the rotation angle and speed of the motor. The servo motor is the actuator, and its own encoder feeds back the angle and speed of the motor rotation. Give the servo amplifier a closed loop to ensure accuracy. Application of servo in CNC automated machine tools The role of the servo system in CNC machine tools is often focused on receiving command signals from the control center and driving the movement of each component of the machine tool, so that they can all move under the guidance of scientific instructions, thereby improving the operation quality level of the CNC automation system. Greatly strengthened. In order to achieve this goal of CNC machine tool automation system, it is necessary to improve the operating speed and accuracy of servo control technology, which indicates that a servo drive system with higher control accuracy should be used. The high-precision servo control system can accurately control the selection quality of effective data in the CNC machine tool data collection and collection process, and make each process of CNC automated machine tool work more reasonable, thereby meeting the requirements of production and construction. actual requirements. Only by improving the accuracy of the servo control system can higher-quality processing devices be used in the production process of CNC machine tools. Because today, with the continuous development of science and technology, people's requirements for machining accuracy are becoming higher and higher. Therefore, focusing on the application of servo control technology in CNC automated machine tools can greatly improve the quality and efficiency of work. Application of servo control technology in automatic system optimization 1) It can improve the accuracy of automated control systems. Automatic control system equipment is very different from ordinary equipment. When automatic control system equipment has corresponding problems, it is not possible to make scientific adjustments and compensation for errors at the first time. Therefore, the accuracy requirements of automatic control equipment are often higher. When servo control technology is applied to the automation system, it can effectively avoid the problem of errors that cannot be adjusted and compensated in time, and can also make the accuracy of each link reach the micron level, thus improving the accuracy of the automation system. 2) Able to do a wide range of speed adjustment work. The speed regulation problem of the automatic control system often determines the quality level of the final work operation. Previous technologies cannot handle this aspect of the work well, but servo control technology, with its many advantages, can fundamentally and continuously adjust the speed of each aspect of the automation system, and its adjustment range is also wider than that of ordinary technologies. The control range is large. Therefore, when servo control technology is applied in automation systems, it is bound to greatly improve the basic performance of the automation system and lay a good foundation for subsequent work. Therefore, applying servo control technology to automation systems can optimize the performance of the automation system in every link, so that various types of automation systems can achieve higher levels of application effects and meet the actual requirements of social production and life. For example, in order to more comprehensively respond to the urgent need for N95 masks during the epidemic, our company provides overall packaged drive motor(Includes unlimited SCH-T42/T60 Stepper Servo Driver package )solutions for N95 mask production machines from mask machine loading, ear wire, nose bridge, ear wire rotation to folding and welding processes, including Pulse N95 mask machine solution, EtherCAT bus N95 mask machine solution.
  • Sharing of application cases of Schwahr in the elevator industry

    Sharing of application cases of Schwahr in the elevator industry

    At present, my country's construction industry is developing in full swing, and more and more high-rise buildings are being built. With the increase in high-rise buildings, it is becoming more and more widely used. Elevator faults are an important factor affecting the safe operation of elevators. Therefore, it is necessary to analyze and discuss the electrical faults of elevators to find out the causes of the faults and adopt targeted solutions and maintenance methods to promote the safe operation of elevators. Introduce you to various process solution cases in the elevator industry. Simply improving the circuit can prevent forced switching to normal operation mode due to power outage. As long-term and durable public equipment, elevators should take into account the possibility of natural disasters or power outages and other emergencies. Rebuilding the electrical system requires very complex circuit design, which takes too much time and effort. Therefore, we propose to use the SCH relay product which is simple in structure but can be constructed safely. Unlike ordinary relays, it uses a coil of 2 permanent magnets. Energizing one of the coils switches to the inspection operation mode, and energizing the other coil switches to the normal operation mode. During maintenance, the relevant tips for moving the bridge compartment are provided to ensure safety. As a countermeasure to the requirements of the above safety standards, indicator lights, buzzers, etc. are prepared. They can not only emit light and sound, but also have built-in flashing circuits. You only need to prepare a φ22 mounting hole under the car to install the lighting warning buzzer, and you can respond. New safety standards. Moreover, since the protection level is IP65 and has waterproof performance, emergency elevators that require waterproofing can also be directly installed and used. With no added cost, time or effort, any elevator can be made safe simply and easily. Enhance elevator safety From the single button switch to the entire control box, it complies with the new safety standards Wenzhou Jinhong Electric Co., Ltd. has extensive experience in machinery safety and can make suggestions for new control boxes from a machinery safety perspective. For customers, Wenzhou Jinhong Electric Co., Ltd. can carry out a series of management including development, manufacturing and quality management of emergency stop switches, push button switches, selector switches, control boxes, etc., and at the same time, combine the above to propose control boxes that correspond to safety standards. The recommendations are the highlights.  
  • Application in Grinder Production Line

    Application in Grinder Production Line

    Application in Grinder Production Line ▲ Introduction of Grinder Production Line With the transformation of traditional industry technical, the automatic change of factory automation and the fast development of enterprise information, the requirements of industrial automation system continue increase. In additional, as the overall cost of industrial labor cost is rising, the process of the “machine replace worker” is advancing. The automatic grinding machine production line with the function of automatic feeding provides the equipment foundation for the production mechanism reform of "reducing staff and increasing efficiency" in sawblade industry ▲ Technological Flow One mechanical hand feed two grinding machines at the same time. During the process of it, system realize cleaning, turning, measuring, sorting and other processes. The equipment has three servo shafts, one stepping shaft and controls one three asynchronous motors and seven cylinders through the output of the switch. Each action is carried out in a predetermined sequence to realize simultaneous processing of two grinding machines, reduce stopping time, improve work efficiency and reduce manpower consumption. ▲ Allocation Plan The equipment is divided into three parts, two grinding machines and one trussed manipulator, and there are three control systems in total. The two grinding machine control systems are respectively connected with the control system of the manipulator, and the connection mode is relay switch signal and 485 bus type communication, and double connection is used to guarantee the equipment reliability. Control system adopts the H series high-performance engine H60S2T and man-machine interface, grinding machine man-machine interface to set parameters, the machining process manipulator with man-machine interface to set operation processes, and displays the current position, and through the RS485(Modbus) share the measurement data information to the corresponding grinding machine, so that grinding machine for purpose of processing, implementation artifacts one-time processing molding. ▲ Plan Advantage 1.  Schwahr adopts removable terminals for PLC to avoid trouble during replacement. 2. The programming style adopts the network style, which is clear, easy to make notes and highly readable. 3. The instruction is modular, each register can be displayed in the same screen, which is easy to monitor and debug. It brings great convenience to the debugging process. 4. The input wide voltage design saves the cost of the transformer. Without the isolation transformer, the PLC can work steadily  
  • Plastic Machinery Industry Application

    Plastic Machinery Industry Application

                                               PLASTIC MACHINERY INDUSTRY APPLICATION Plastic extruders use more temperature control tables, and machines with small extrusions are single-screw extrusions. Most of the output is large or the speed required is twin-screw extrusion. The temperature control system plays an important role in the screw extruder. The temperature control is stable and accurate, which is very important for the production efficiency of the equipment. Especially in the twin-screw extrusion, a large amount of heat is generated due to the internal high-speed rotary friction, and there is external heating. After the heat of the circle, the plastic particles sent from the hopper are quickly sent into the barrel, the temperature inside the barrel changes rapidly, and the temperature controller needs to be fast enough to respond quickly, and the PID control algorithm is accurate to meet the working requirements of the equipment. Our company's intelligent fuzzy PID algorithm (FUZZY) has heating-cooling control. The control heating output is fast, the cooling output is timely, and the optimized self-tuning algorithm is about 40-50% faster than the common domestic and international mainstream temperature control table setting time, and the temperature stabilization time is about 20% faster. Control temperature stability is better than domestic similar brands, reaching or surpassing foreign mainstream brands. At present, the temperature control table using this new PID algorithm has been installed in more than 100,000 instruments in various industries, and has been widely praised by users, which proves the market's recognition of this algorithm. The counter receives the length signal on the production line through the rotary encoder, and displays the length of the pipe on the production line. When the measured length reaches the set value, the counter outputs a control signal to the cutter, and the cutter cuts the pipe to complete the length counting. The digital display meter receives the analog signal output from the inverter, converts the display motor speed or the working current of the motor, and gives the worker the status of the relevant equipment parameters on the production line.  
  • Painted Production Line

    Painted Production Line

    Painted Production Line The printing production line of colored steel plate is a complete of production equipment for colored steel plate, and the process is as follows: make the steel coil strips be subject to surface degreasing, parkerising and passivating treatment, then apply multi-layer organic coatings (e.g.coatings of modified resin (SMP), high weather-resistant polyester (HDP), polyvinylidene fluoride (PVDF) etc.) on the strip surface by means of continuous roller coating, next, overprint multi-color patterns, and finally compound to form new functional plates. The production line is composed of equipment of uncoiler, sewing machine, tension machine, storage machine, degreasing and washing unit, roller-coating machine, printing machine, curing furnace, shear, coiler etc.. Equipment Parameters: Material of base plate: electro-galvanized plate, hot-dip galvanized plate, hot dip Al-Zn plate, cold-rolled steel plate etc.  Width of strip steel: 600-1650mm Thickness of strip steel: 0.12-1.5mm  Outer diameter of steel coil: φ800-2000mm  Process speed: 25-180m/min  Thickness of coating: 5-25μm for the single-layer dry film on the front face (regulated as required)5-15μm for the single-layer dry film on the back face (regulated as required) Thickness of printing layer: ≤1μm (oil ink or polyester) Production capacity: 50,000-200,000 t/year  Energy type: electricity, natural gas, liquefied petroleum gas, coal gas, steam, compressed air etc. Equipment Characteristics: The equipment has advanced continuous roller coating process, with twice coatings and twice dryings for the front face and the back face, and mature and reliable technologies, and is widely used to the metal structure plants, municipal public services and high-end civil construction fields.  The pre-treatment adopts continuous alkali circulating spraying, scrubbing and multi-stage circulating water spraying as well as fresh water spraying to enhance the washing effect, clean the strip steel surface, guarantee the coating quality and strengthen the adhesive force between the strip surface and the paint coating.  The equipment adopts advanced environmental formation processing fluid and is equipped with high-precision chemical coating machine with even film coating, which guarantees the performance and quality of the coating. Such process is characterized in good utilization of formation agent, no pollution and good adhesive force of formation film etc. The roller-coating machine is equipped with pressure sensor to precisely display the pressure of coating roller, which can precisely control the coating evenness, and through the variable-frequency speed control of vector motor, the machine can execute forward or backward coating operation and can precisely control the thickness of coating to be within 1 micrometer, so as to adapt to the production requirements of various products.  The coating curing and drying furnace adopts multi-layer labyrinth flashboard structure having good thermal insulation effect, and has multiple sets of hot air circulating devices and have functions of air distribution and management, waste gas collection and decomposition treatment, automatic temperature control etc.; it is equipped with catalytic incineration device as well as perfect and fine waste heat recycling device, and the exhaust gas meets the national environmental emission standard, which really achieves energy-saving and consumption reduction effect. The technical level of organic waste gas decomposition and heat utilization is second to none in China  The printing process adopts three-color over-printing technology and the printer adopts digital control technology, making the thickness of printing coat be less than 1 micrometer, thus to effectively control the printing precision and color The control system adopts computer control systems of variable-frequency speed control of vector motor, site bus and fiber communication and real-time parameter monitor technology, with good human-machine interface, and it can be matched with computer unified management software for production scheduling, operation record and data curve display etc., and the equipment is in safe, stable and reliable operation. Introduce the concepts of intelligent production and energy management system, and configure multiple technical devices for fine regulation of energy saving, consumption reduction and production control, e.g., variable-frequency fan etc..
  • Construction machinery

    Construction machinery

    Construction machinery Modern engineering textile machinery and equipment integrate precision machining, electrical and electronic, hydraulic, pneumatic, instrumentation, oil bath, central lubrication and computer control. It is the latest achievement of composite technology. The various sensors of its eyes and nervous system are the primary link to realize automatic detection and control, and are an important symbol of modern weaving technology. The characteristics of textile technology determine the sensitivity of textile equipment to sensors and the higher precision requirements. The application of sensors in engineering textile machinery and equipment has its particularity. For the applications of this industry, Schwahr pressure, temperature, displacement and other sensors have the characteristics of good sensitivity and high accuracy.    
  • Tension and straightening machine production line

    Tension and straightening machine production line

    Tension and straightening unit process flow After the cold-rolled raw plate coils are leveled by the leveling machine, they are lifted by the overhead crane to the saddle in front of the decoiler. The steel coil is positioned behind the uncoiler drum, the outer support rises, and the uncoiler drum begins to open, tightening the inner diameter of the steel coil, and at the same time, the pressure roller compresses the steel coil. Then, the drum and pressure roller of the uncoiler start to rotate, and the strip head is sent to the pinch roller through the threading table. The strip after cutting is sent to the C-shaped narrow tower welding machine to be welded with the tail of the previous roll of strip. After the welding is completed, the unit starts running, and the strip passes through the 1# tension roller and enters the tension leveler at the normal production speed of the unit. The tension bending straightening machine is a two-bend and two-straightening type. A set of 4-roller tension rollers are installed at the entrance and exit of the tensioning and straightening machine, so that the strip steel enters the straightening machine with a certain tension. After the strip passes through the stretch bending straightening machine, it enters the double-roller correction device to center the strip during the process. This process section is called the process section. After the strip leaves the double-roller correction device, it passes through the horizontal inspection platform for surface inspection of the strip. Then it is sheared by the trimming disk. The waste edge is taken up by the waste edge coiler. The trimmed strip passes through the burr roller. After pressing the burrs, it enters the electrostatic oiling machine for oiling, enters the outlet shear, and enters the coiler through the steering pinch roller. This section is called the exit section. Technical performance of tension and straightening equipment The coils produced by the tension leveling line are made of low carbon steel such as Q195F, SPCC, 08F, Q215, Q195LD, 16MN, and SPCD. Mechanical properties of the strip:     Thickness>0.15mm     Width<1000mm     Coil outer dimensions φ900—φ1800mm     Roll weight <20 tons Some technical parameters of the tension and straightening line:     Unit linear speed: 30-240m/min     Threading speed: 30m/min     Unwinding tension: 10KN     Coiling tension: 10KN     Elongation: 0.5-3%      Annual output of unit: 100,000 tons

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