Compared with other manufacturing processes, valve manufacturing process has the following characteristics: â‘ valve blank manufacturing process and inspection process is more complicated. Valve casting blank is a structure called the complex thin-walled shell parts. The casting requirements of smooth surface, casting a clear, in particular, to have a dense defect. In order to meet the above requirements, a series of process measures should be taken during casting, such as the selection of high refractory molding material and the control of sand moisture, the molding should be layered to ensure real sand to ensure that the hardness, the use of a reasonable system and strict control pouring hat gate Pouring speed and temperature. Due to the high technical requirements, valve casting rough casting process is much more complex than the average castings. In addition, the valve blank in addition to check size, position accuracy and appearance, there are some for the microstructure, mechanical properties, corrosion resistance and non-destructive testing and other tests, so the valve inspection process is more complicated. â‘¡ valve parts installed on the machine more difficult Valve main parts of the structure, the shape is more complex, some parts are thin wall, slender, poor rigidity. When machining on a machine tool, positioning and clamping are difficult and often require complex special fixtures. Some valve parts, the positioning of the base surface of the lower accuracy, high surface roughness, and sometimes even the use of non-machining surface positioning. The machined sealing surface and other parts of the precision and surface roughness are high, it is difficult to ensure the quality of processing. Therefore, to meet the needs of the process, it is often necessary to increase the accuracy of the positioning of the base surface and reduce the surface roughness, or the positioning of non-machined surface of the base surface, which increases the complexity of the valve manufacturing process. â‘¢ machining difficult Due to the wide range of valve materials, in addition to a variety of cast iron, carbon steel, most of its high strength, corrosion resistance and high hardness of the cutting performance of materials are poor, it is difficult to make the parts meet the specified processing accuracy And surface roughness. The valve sealing surface geometry and surface roughness of the high requirements, so more difficult to increase the valve machining. At the same time, poor cutting performance of the valve material, but also to the valve processing methods, cutting tool material, cutting dosage, technology and equipment has brought a lot of new problems. More Keywords Search: Valve
Radiator For BMW
The radiator is a key component used to cool the engine, ensuring that the engine is at the right operating temperature by removing heat from the engine. BMW radiators are usually made of aluminum and have excellent heat dissipation and corrosion resistance, which can effectively reduce the engine temperature and improve the working efficiency and life of the engine.
Depending on the model and engine type, BMW radiators can be divided into different series and specifications to meet the needs of different vehicles. BMW radiator is well designed, easy to install, high reliability, is one of the important parts of BMW cars.
In general, the BMW radiator is a high-quality, high-performance automotive radiator that can effectively protect the engine and extend the life of the car, which is the ideal choice for your BMW car
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