Matters needing attention in the selection of blank types.

(1) Part materials and mechanical properties

The material of the part roughly determines the type of blank. For example, castings should be selected for parts made of cast iron and bronze; steel parts should be selected when the shape of steel parts is not complicated and the mechanical performance requirements are not too high; for important steel parts, to ensure their mechanical properties, forging blanks should be selected.

(2) The structural shape and dimensions of the parts

Blanks with complex shapes are generally manufactured by casting methods. Sand casting is not suitable for thin-walled parts; advanced casting methods can be considered for small and medium-sized parts; sand casting can be used for large parts. For general-purpose stepped shafts, if the diameters of the steps are not much different, round bar materials can be used; if the diameters of the steps are quite different, in order to reduce material consumption and machining labor, it is advisable to choose forging blanks. Large parts generally choose free forging; small and medium-sized parts can choose die forgings; some small parts can be made into integral blanks.

(3) Type of production

For mass-produced parts, select a blank manufacturing method with relatively high accuracy and productivity. For example, castings adopt metal mold machine modeling or precision casting; forgings adopt die forging and precision forging; profiles adopt cold-rolled or cold-drawn profiles; when the output of parts is small, Choose a blank manufacturing method with lower accuracy and productivity.

(4) Existing production conditions

To determine the type and manufacturing method of the blank, the specific production conditions must be considered, such as the technological level of the blank manufacturing, the equipment status and the possibility of external cooperation.

(5) Fully consider the use of new processes, new technologies and new materials

With the development of machinery manufacturing technology, the application of new processes, new technologies and new materials in blank manufacturing has also developed rapidly. Such as precision casting, precision forging, cold extrusion, powder metallurgy and engineering plastics are increasingly used in machinery. The use of these methods greatly reduces the amount of mechanical processing, and sometimes the processing requirements can even be achieved without mechanical processing, and the economic benefits are very significant. We should give full consideration when selecting the blank, and try our best to use it when

Precision casting is also called precision casting, lost wax casting,and its materials include stainless steel, various alloy steels, and carbonsteel.

As a professional precision casting manufacturer, we also have strongmachining capabilities, with various Japanese imported and domesticallyproduced processing equipment to ensure that the product processingrequirements are qualified.