Blank valve selection principle

 There are commonly used in rough machining castings, forgings, profiles and welding parts. Different types and rough rough accuracy, roughness and hardness of the machining process has a direct impact.

     Select Valve blank the following factors should be considered:

     ⑴ parts materials and the organization of materials and performance requirements.

     The design of parts and materials required to be provided, largely determines the type of blank. For example, the part of cast iron material for casting methods must be used to make rough. For the steel parts, should be considered in the selection of rough materials, the mechanical performance requirements. For example, the manufacture of high-pressure valve components in general should try to use forged or welded parts, to ensure the material has good mechanical properties.

     ⑵ parts of the structure shape and form factor.

     Parts of the structure and shape are important factors affecting choice of blank, for example, complex shape of the body structure should try to use casting. A large body size can choose sand casting; small size while using investment casting.

     ⑶ the size of the production program.

     The greater part of the production program, using high-precision and high efficiency as possible economic effects of blank manufacturing methods.

     ⑷ blank manufacturing conditions.

     Should be based on site conditions and technological level of equipment to select the blank, and to consider prospects for the development of the rough phase the use of advanced manufacturing methods. 

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