Precision forging is the most accurate of all forging methods. The precision is generally better than 0.5%, and the repeatability is good. The casting can be put into use with only a small amount of machining. Because the mold is used in a single use, it is possible to manufacture parts with complicated internal structures, and it is possible to produce parts that cannot be produced by casting or machining.
Although precision forging has many advantages, its production process is complicated and lengthy. The aluminum mold for pressing the wax mold generally takes several months depending on its complexity and size. After the aluminum mold is obtained, it takes several weeks to obtain the casting. These weeks are mainly used to make shells. In addition to time-consuming, precision forging is still very labor-intensive, and 50% to 80% of the cost is derived from labor. In addition, the amount of mold used in small batch production is spread to make the unit price expensive.
Rapid prototyping and precision forging are complementary, both of which are used in the manufacture of complex profile parts. If there is no rapid automatic forming, the production of mold is the bottleneck process of precision forging; however, without precision forging, the application of rapid automatic forming will have great limitations.
The application of rapid prototyping technology in precision forging can be divided into three types: one is the disappearing molded part (mold) process, which is used for small batch production; the other is direct shell method for small quantity production; the third is fast wax. Mold making, for mass production.