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русскийDie manufacturing is divided into planar blanking die and cavity die with space according to the structural characteristics. The punching die uses the precise size matching of the punch and the die, and some even fit without gaps. Other forging dies such as cold extrusion dies, die-casting dies, powder metallurgy dies, plastic dies, rubber dies, etc. are all cavity dies, which are used to form three-dimensional workpieces.
The cavity mold has size requirements in the three directions of length, width and height, and the shape is complex and difficult to manufacture. Mold production is generally single-piece and small-batch production, with strict and precise manufacturing requirements, and sophisticated processing equipment and measuring devices are often used.
The plane blanking die can be initially formed by EDM, and then the precision can be further improved by forming grinding, coordinate grinding and other methods. Form grinding can be performed on an optical projection curve grinder, or a surface grinder with a reduction and repair grinding wheel mechanism, or a special form grinding tool can be used on a precision surface grinder.
The coordinate grinding machine can be used for precise positioning of the mold to ensure precise hole diameter and hole distance. A computer numerical control (CNC) continuous trajectory coordinate grinding machine can also be used to grind the punch and die of any curved shape. The cavity mold is mostly processed by profiling milling machine, electric discharge machining and electrolytic machining. The combined application of profiling milling and numerical control and the addition of a three-way translation head device in EDM can improve the processing quality of the cavity. Adding aerated electrolysis to electrolytic machining can increase production efficiency.
