1. The material and physical properties of the parts are specified. The technical characteristics and mechanical properties of the raw material of the precision cast parts probably determine the type of blank. Casting manufacturer details such as pig iron parts with casting blanks; steel parts when the look is simple and mechanical properties are not high when common round bar, for key steel parts, in order to get better mechanical properties, should take forgings, when the look is complicated mechanical properties are not high to stainless steel castings; rare metal parts common aluminum profiles or casting blanks.
2. Parts of the structure of the form and size. Large and medium-sized and structure of the more simple parts of the blank commonly used sand mold casting or free forging; wax mold casting structure of the cumbersome blank commonly used casting; small and medium-sized parts can be used die forgings or work pressure casting blank; plate steel parts commonly used forging blank; shaft parts of the blank, if the step diameter gap is not large, you can use round bar; if the steps are relatively large distance between the size, it is appropriate to select forgings.
3. The size of the production outline. A large number of many production, should be selected to use the precision and productivity are higher blank production and manufacturing methods. Casting parts selected metal type casting equipment modeling design and high precision casting, forgings with free forging or precision forging. In bulk small batch production choose wooden template hand-made modelling design or free forging to produce manufacturing blanks. Current production standards. When specifying blanks, it is important to integrate the actual production standards, such as the overall level and working capacity of the onsite blank production and manufacturing. The probability of outsourcing, etc., otherwise it is also not practical.
4. Flexible use of new technologies and techniques. New materials. Casting manufacturers in order to save raw materials and electricity and energy, to enhance the productivity of machining and manufacturing, should take into account the high precision casting. Forging. Hot rolling. Hot forging. Powder metallurgy. Shaped stainless steel plates and rubber products in the use of equipment, then, can greatly reduce the amount of machining and manufacturing, and even do not have to carry out production and processing, the economic benefits are very obvious.