What is the principle of pneumatic tools? How do pneumatic tools work?
Pneumatic tools are:
1, which can be used in explosive, corrosive, high temperature and humid working environment;
2, the motor can be overloaded without burning;
3, simple structure, firmness and durability, and relatively easy maintenance;
4, large output torque, light weight and high efficiency;
5, stepless speed regulation can be realized, resulting in rotation, reciprocating and impact motion;
It is widely used in modern machinery manufacturing, shipbuilding, automobile manufacturing and many other fields, especially automobile manufacturing. It is widely used in grinding, polishing, spraying, assembly and other working conditions in automobile production. It is one of the indispensable and important tooling equipment for modern automobile mass production. In automobile manufacturing, nearly 90% of the vehicle assembly connections are threaded connections, so pneumatic tightening tools have been widely used in vehicle assembly.
Broadly speaking, pneumatic tools are mainly tools that use compressed air to drive a pneumatic motor and output kinetic energy to do work. Generally, pneumatic tools are mainly composed of power output part, operation form conversion part, intake and exhaust pipeline part, operation start-stop control part, tool shell and other main parts. Of course, pneumatic tools must also have energy supply part, air filtration and air pressure adjustment part and tool accessories.
1. Power output part: It is one of the main parts of pneumatic tools, mainly composed of pneumatic motor and power output gear. It relies on high-pressure compressed air to blow the motor blades, so that the motor rotor rotates and outputs rotary motion to the outside world, and drives the whole operation form conversion part to move through gears. According to whether the stator and rotor are concentric, the pneumatic motor of pneumatic horse can be divided into concentric motor and eccentric motor, and according to the number of air inlets, it can be divided into single intake motor, double intake motor and multi-intake motor. No matter what form of pneumatic motor, it relies on compressed air to blow the motor blades to drive the rotor to rotate. When the motor blades rotate at high speed, they always rub against the inner wall of the stator. It is the most common wearing parts in Madanes, so it requires high quality of compressed air, and whether the compressed air contains lubricating oil molecules.
2. Operation mode conversion part: mainly converts the rotary motion output by the motor. In the automobile manufacturing industry, there are many ways of screw connection, most of which are rotary motion, and of course there are linear reciprocating motion. For different types of pneumatic tools, the conversion part of operation form is mainly divided into mechanical clutch and planetary gear set, friction plate clutch and planetary gear set, hydraulic cylinder, torsion bar and hammer block set. The above parts are all important parts based on rotary motion, which determine the torque, rotational speed, tightening accuracy and other important parameters of pneumatic tightening tools. Because of its constant clutch, compression or torque change, its components are easy to be damaged;
3. Inlet and exhaust duct: Obviously, the inlet and exhaust duct is the relevant passage for compressed air to enter and exit, and it is the energy supply system to ensure the normal movement of the motor;
4. The control part of starting and stopping movement, namely pneumatic switch, is easy to be damaged due to direct contact with the operator and external objects at all times, and there are many engineering plastic products;
5. Energy supply part: compressed air is mainly formed after the air compressor compresses the atmosphere, and it is transmitted to relevant electricity consumption through compressed air pipeline, which is pulsating;
6. Air filtration and air pressure adjustment: Because compressed air is usually transported through pipes made of seamless steel pipes, rust on the inner wall of compressed air will be formed continuously during long-term use, and moisture and dust in compressed air will be compressed. If this compressed air directly enters the pneumatic motor without any treatment, the service life of the motor will be greatly shortened, resulting in insufficient and unstable power output of the whole tool, which is prone to the phenomenon of serial damage of the motor and other components. Therefore, a compressed air filtering and adjusting device must be set between the compressed air transported by the pipeline and the pneumatic tools, and the pneumatic triplet undertakes this task. Pneumatic triple is mainly composed of barometer, filter, oil mist ejector, voltage regulator and other components, in which the filter has a built-in filter element, which should be regularly maintained, cleaned and replaced after a period of use;
7. Tool accessories: The tool accessories here refer to the tools installed on the pneumatic concrete and in direct contact with the workpiece, and the pneumatic triplet undertakes this task. Pneumatic triple is mainly composed of barometer, filter, oil mist ejector, voltage regulator and other components, in which the filter has a built-in filter element, which should be regularly maintained, cleaned and replaced after a period of use; If this compressed air directly enters the pneumatic motor without any treatment, the service life of the motor will be greatly shortened, resulting in insufficient and unstable power output of the whole tool, which is prone to the phenomenon of serial damage of the motor and other components. Therefore, compressed air filtering and adjusting devices, including various pneumatic sleeves, connecting rods, adapters, cutter heads, etc., must be installed between the compressed air transported by the pipeline and the pneumatic tools.
The above-mentioned parts are interdependent and mutually restrictive, and cannot exist in isolation to achieve operation.