Application of clamping force detection in tooling

The sensor is the device and device that can feel and receive the information within the specified range. It can detect the operating environment and operating objects within the control range of the mechatronics system, as well as the mechatronics system itself, so that the system can operate effectively. Sensors can be classified into many types according to different rules. There are two kinds of sensors designed and manufactured according to the rules of energy conversion -- energy control sensor and energy conversion sensor. They can obtain information through the physical effect of energy conversion when they are separated from the external power supply. There are three kinds of sensors designed and manufactured according to measured parameters: physical parameters, mechanical parameters and thermal parameters. According to the different materials, the sensors can be divided into many types including crystal structure and physical properties. According to the working principle, it can also be divided into biosensors, physical sensors, chemical sensors. Sensors in the long-term development process, has formed a number of different characteristics of the type, suitable for a variety of different environments, the use is more diverse, so can meet the requirements of different electromechanical integration system, only combined with the requirements of reasonable selection.

Research status and development of sensors.

With the continuous development of science and technology, the research and development of sensors has become more advanced with the continuous expansion of human exploration field and space. Both in terms of type, speed and information processing capacity, sensors have been greatly strengthened, and their applications in electromechanical integration systems are also becoming more and more extensive. The 1980s was an important moment when the sensor development entered the golden period. All countries invested a large amount of manpower and finance in the sensor research and development and production, and made it an emerging independent industry, occupying an important position in the field of modern science and technology. Up to now, the application of sensors has been everywhere, and the related technology is increasingly perfect. The industry is generally optimistic about the development of sensor industry, and it will be included in the national key development of the industry project.

Application of sensor in mechatronics system.

Application of sensing technology in machining.

Mechanical processing has higher requirements for each work, in order to make the processing process meet the requirements, the need to carry out the relevant testing to each link of the processing. Before processing, it is necessary to conduct automatic inspection on the processing equipment to ensure that the equipment can meet the various operating conditions of processing. For example, the clamping orientation of the blank is automatically judged, and the actual clamping position of the blank is adjusted accordingly. Meanwhile, the clamping deformation and clamping force of the blank after bed should be determined. After the completion of processing, it is necessary to measure the shape, size, position tolerance and other data of the workpiece to ensure that the quality of the workpiece meets the design and manufacturing requirements. These test items need to be completed in the processing process and form test data to lay a foundation for the development of the next process. In the production and processing of precision products, in order to ensure the qualified rate of products, it is necessary to carry out strict requirements on the processing conditions, the speed, temperature, pressure, vibration, cutting torque and other automatic detection and adjustment in the processing process, so that the processing conditions are always in the best state. In mechanical processing, the application of sensing detection technology can optimize the cutting process. By sensing technology, the cutting force, Angle, cutting contact surface, cutting state, motor power and other data can be scientifically controlled, reducing the cutting rate of materials, so as to better control the production cost. In machine tool processing, the sensor can ensure the dynamic stability of the processing process, and by controlling the vibration, impedance parameters and other data of the relevant parts of the bed, the weak links of the machine tool processing can be strengthened, so as to improve the processing accuracy. At present, the transducers used in machining in China are mainly strain and piezoelectric three-directional force transducers, which play an important role in the research and analysis of metal cutting principle and the design and formulation of cutting data in the process of machining.

Application of sensor technology in automobile industry.

Sensors are widely used in automobile manufacturing. With the continuous development of the automobile industry, automobile products have begun to develop towards miniaturization, electronization, lightness and intelligentization, which makes the manufacturing of related products have gradually increased the demand for sensors. In the process of automobile production, electronic control system including automatic transmission, anti-lock braking system, drive anti-skid system and other devices, all need to use the sensor technology to complete. With the increasing of automotive electronics, automotive mechatronics system had begun to replace the pure mechanical control system, in the car body is comprehensive, including engine control system, chassis control system, car body control and navigation systems, vehicle control system are using sensor technology to complete the system function, make the car system applied to achieve the higher reliability and functionality.

Automotive sensors have the characteristics of strong adaptability, strong anti-interference ability, high stability and reliability, low price and so on. They can be used in a variety of harsh environments such as wind and rain, rugged roads and other environments, while ensuring better sealing, moisture resistance and corrosion resistance, can adapt to the high temperature, high pressure car engine room internal environment, but also can resist the engine when the work of the strong vibration and electromagnetic waves. In addition, with the continuous improvement of vehicle running speed, the requirements for each component are also higher and higher, and the sensors in the vehicle electromechanical integration system also need to have higher stability and reliability. Due to the continuous expansion of automobile production, sensors should also be capable of mass production, which requires that the production of sensors can be automated and production costs can be effectively controlled.

At present, in the key control system of automobile, including crankshaft position sensor, inspiratory and cooling water temperature sensor, pressure sensor, gas sensor and other sensors are irreplaceable. Take the engine control system as an example, the sensor in this system as the core of the entire vehicle sensor, including temperature, pressure, position, speed, flow, gas concentration, detonation and other types of sensors. These sensors can collect information on the overall health of the vehicle and accurately control the working condition of the engine, enabling it to increase power, reduce fuel consumption and realize fault detection. Because the car engine work environment is relatively poor, need to deal with high temperature, humidity, vibration, shock, steam, salt fog and corrosion, sludge pollution, etc., thus used in automobile system sensors on the technical indicators, the measurement precision and reliability are significantly higher than the general industrial product, otherwise it is difficult to achieve the goal of guarantee the normal work of the engine.

In the automotive mechatronics system, sensors are not only used in the engine system, but also in the automotive safety management system. At present, the automobile safety management system mainly USES acceleration sensor and pressure sensor to control the automobile side airbag. According to the statistics of relevant data, pressure sensors are three times faster than acceleration sensors in detecting the speed of side impact, with smaller error probability and higher penetration rate in automobile safety management system.

Application of sensors in CNC machine tools.

Digital signal is used to control the process of the nc machine tool, and the sensor can realize the digital control of the relative motion between the tool and the workpiece, so that the size and precision of the workpiece can meet the requirements of the parts processing. Common sensors on nc machine tools have a photoelectric encoder, temperature sensor, current sensor, voltage sensor, inductosyn, infrared sensor, the sensor to get numerical control machine tool to realize the workpiece position detection, linear displacement and angular displacement, and the data processing speed, pressure, temperature and so on the effective control. Take the pressure sensor as an example. When the workpiece is processed by the machine tool, the sensor can detect the clamping force exerted by the machine tool on the workpiece. When the clamping force is lower than the set value, which causes the workpiece to become loose, the sensor can send an alarm and stop the processing process. Not only that, the pressure sensor can also detect the machine tool cutting force changes, and the lubrication, hydraulic, pneumatic system of the oil or gas pressure to detect, if these data is not set value, the sensor will send a fault signal to the control system. The application of sensors in the electromechanical integration system of CNC machine tools effectively solves the problem of low manual detection efficiency and makes the troubleshooting more efficient. With the development of numerical control technology, the application of sensors will also be improved. Application in fixture clamping Force Detection (Figure 2)