The characteristics of the pneumatic valve manufacturing process

the characteristics of the pneumatic valve manufacturing process: compared with other institutions manufacturing process, pneumatic valve manufacturing process has the following characteristics:
1) pneumatic valve manufacturing process and inspection process of blank is more complex.
pneumatic valve casting blank is called a complex thin-walled shell structure. The requirements of the casting surface is bright and clean, clear hand type, particularly the density of defects. In order to meet the above requirements, should take a series of technological measures when casting, such as molding material selects high refractoriness and control water, moulding should be layered solid in place to ensure that the hardness of sand mould, adopt reasonable pouring cap system and strict control of casting speed and temperature, etc. Due to the high technical requirements, pneumatic valve blank casting process is far more like complex castings.
in addition, the pneumatic valve blank in addition to check the size, location precision and appearance, some for the microstructure, mechanical properties, corrosion resistance and nondestructive flaw detection, and other inspection, therefore, the inspection process of pneumatic valve has more complex.
2. Pneumatic valve parts in difficult pneumatic valve installed on the main parts of machine tool structure and complicated shape, some parts wall thin, long and thin piece, the poor rigidity. On the machine tool processing, the positioning and clamping are difficult, so often require complicated special fixture.
some pneumatic valve parts, low precision positioning on the surface of the base, the surface roughness is higher, sometimes even using the processing surface location. By machining accuracy and surface roughness requirements in areas such as the sealing surface is very high, so hard to ensure the quality of machining. Therefore, in order to meet the needs of the process, often must improve the positioning base surface precision and reduce the surface roughness, or located in the machining on the surface of the base level, this increases the complexity of pneumatic valve manufacturing process.
3. Mechanical processing is difficult because of all kinds of pneumatic valve material is various, in addition to all kinds of cast iron, carbon steel, the majority of its high strength, high corrosion resistance and hard material cutting performance is very poor, it is difficult to make the parts meet the machining accuracy and surface roughness. And pneumatic valve sealing surface geometric shape is very tall to the requirement of accuracy and surface roughness, thus increased the pneumatic valve machining difficulty. At the same time, the pneumatic valve material cutting performance is poor, and the processing method for pneumatic valves, cutting tool material, cutting dosage, the respect such as process equipment has brought about many new problems.








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