How to select and test high quality valve blank
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Release Time：2018-08-30
Machining commonly used blanks are castings, forgings, profiles and weldments. Different types of blanks and the accuracy, roughness and hardness of the blank have a direct impact on the machining process. The following factors should be considered when selecting the valve blank:(1) the material of the parts and the organization and performance requirements of the material. The part material specified on the design drawing generally determines the type of blank. For example, if the part material is cast iron, the blank must be made by casting. For steel parts, the mechanical properties of the material should be considered when selecting the blank. For example, parts for the manufacture of high-pressure valves should generally be forged or welded
Machining commonly used blanks are castings, forgings, profiles and weldments. Different types of blanks and the accuracy, roughness and hardness of the blank have a direct impact on the machining process. The following factors should be considered when selecting the valve blank:
(1) The material of the part and the requirements for the organization and performance of the material. The part material specified on the design drawing generally determines the type of blank. For example, if the part material is cast iron, the blank must be made by casting. For steel parts, the mechanical properties of the material should be considered when selecting the blank. For example, the manufacture of high-pressure valve parts should generally be selected day forging or welding parts, to ensure that the material has good mechanical properties.
(2) The structural shape and external dimensions of the parts. The structural switch of the part is an important factor affecting the selection of the blank. For example, the valve body with complex structural switch can be cast. Large size of the valve body can choose sand casting; small size is the use of investment casting.
(3) the size of the production program. The larger the production program of the parts, the better the economic effect of the high-precision and high-efficiency blank manufacturing method.
(4) the conditions of blank manufacturing. Should be based on the site of the equipment and process level to select the blank, and take into account the development prospects and gradually adopt advanced blank manufacturing methods.
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