The expansion of the application of pneumatic technology is a sign of the development of the pneumatic industry. The application of pneumatic components is mainly in two aspects: maintenance and matching. In the past, the sales of domestically produced pneumatic components were used for maintenance. In recent years, the sales share directly for the main supporting products has increased year by year. The application of domestic pneumatic components ranges from tens of millions of metallurgical equipment to chairs of only 1-2 yuan. Railway troughs, machine wheel rail lubrication, train braking, street cleaning, lifting equipment in special workshops, military command vehicles, etc. all use specially developed domestic pneumatic components. This shows that pneumatic technology has “infiltrated” into all walks of life and is expanding.

Although China's pneumatic industry has reached a certain scale and technical level, compared with the international advanced level, the gap is very large. The output value of China's pneumatic products only accounts for 1.3% of the world's total output value, only 1/21 of the United States, 1/15 of Japan, and 1/8 of Germany. This is very disproportionate to the big country with a population of more than 1 billion. In terms of varieties, there are 6,500 varieties in a Japanese company, and only one-fifth of them in China. The gap between product performance and quality levels is also large.

As pneumatic technology is increasingly used in the automatic assembly and automatic processing of small parts and special items in various industries, the performance of the original traditional pneumatic components is constantly improving, and at the same time, new products adapted to market requirements are developed. The variety of pneumatic components is increasing, and its development trend mainly includes the following aspects:

Smaller in size, lighter in weight and lower in power consumption. In the manufacturing industry of electronic components and pharmaceuticals, the size of the workpiece is limited, which is bound to limit the size of pneumatic components. Miniaturization and light weight are the first of pneumatic components. Development direction. An ultra-small solenoid valve with a thumb size and an effective cross-sectional area of ​​0.2 mm2 has been developed abroad. It is more desirable to develop components with small outline sizes and large flow rates. For this reason, the flow rate of the valve of the same size has been increased by 2 to 3.3 times. There is a series of small solenoid valves with a valve body width of only 10mm, an effective area of ​​up to 5mm2, a width of 15mm, and an effective area of ​​up to 10mm2.

The power consumption of foreign solenoid valves has reached 0.5W, and will be further reduced to accommodate the integration with microelectronics.

The gas source treatment assembly is mostly made up of block-type block structures at home and abroad, which is not only compact in size, but also convenient in combination and maintenance.

The positioning accuracy of the actuator is improved, the rigidity is increased, the piston rod is not rotated, and the use is more convenient. In order to improve the positioning accuracy of the cylinder, the cylinder application with the brake mechanism and the servo system is more and more popular. A cylinder with a servo system can achieve a positioning accuracy of ±0.1 mm even if the supply pressure and the negative load change.

At the international exhibition, there are many cylinders of various shaped cross-section cylinders and piston rods. Since these pistons do not rotate when they are used on the main engine, they can maintain a certain precision without additional guides. In addition, a number of cylinder and cylinder slide assemblies with various guide mechanisms have been developed, such as cylinders with two guide rods, double cylinder double cylinder cylinders, and the like.

The shape of the cylinder barrel is not limited to a circular shape, but a square shape, a square shape or the like. The guide groove, the sensor and the mounting groove of the switch are opened on the profile, so that the user can install and use more conveniently.

Multi-functional, composite. In order to facilitate users, to adapt to the needs of the market, a variety of small pneumatic systems with multiple pneumatic components combined with control devices have been developed. For the component used to move small items, the two cylinders with the guide are combined according to the X-axis and the Z-axis. The assembly can handle 3kg heavy objects, equipped with solenoid valve and program controller. It has compact structure, small space and adjustable stroke. Another example is an upper and lower material module, which has seven different functional module forms, which can complete the upper and lower material operations on the precision assembly line, and can arbitrarily combine different modules according to the operation content. There is also a robot which is a combination of a oscillating cylinder and a collet having a small outer shape and capable of changing the swing angle, and a plurality of types of collets are available at the chuck portion.

Combined with electronic technology, a large number of sensors are used, and pneumatic components are intelligent. Cylinders with switches have been widely used in China, the switch volume will be smaller, the performance is higher, and it can be embedded in the cylinder block; some also have two-color display, which can show the position error. To make the system more reliable. Using sensors instead of flow meters, pressure gauges, and automatic control of compressed air flow and pressure can save energy and ensure proper operation of the device. Pneumatic servo positioning systems have entered the market. The system uses a three-position five-way pneumatic servo valve to compare the predetermined positioning target with the position sensor detection data and implement negative feedback control. When the maximum speed of the cylinder is 2m/s and the stroke is 300mm, the system positioning accuracy is ±0.1mm. A new type of intelligent solenoid valve has been successfully produced in Japan. This valve is equipped with a logic circuit with a sensor, which is a combination of pneumatic components and optoelectronic technology. It can directly accept the signal of the sensor. When the signal meets the specified conditions, it can complete the action by itself without using an external controller to achieve the control purpose. It has been applied to the conveyor belt of the object, which can identify the size of the moving object, so that the large piece can be directly sent down and the small part can be shunted.

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