In industry, there are many different types of precision parts. Since the technologies involved in each industry are different, the parts employed and used are also very different. Due to the different shapes of the parts, in many cases they have to be machined in various ways to enhance its quality and related properties and functions. Today's CNC machining methods have been extended to a variety of manufacturing areas, with CNC precision parts machining being a common means of enhancing metal products. As the features of the technology continue to improve, its processing quality is gradually upgraded and transformed.
The CNC precision parts machining method will also involve the die-casting process.
The die casting process is the process of unifying pressure, speed and time using three main elements: machine, die and alloy. Used for metal thermal processing, the presence of pressure is the main feature of the die casting process that distinguishes it from other casting methods . Pressure casting is a special casting method with less cutting in the recent development of metalworking process. It is the molten metal in high pressure and high speed filling the casting, and in high pressure crystallization solidification to form the casting process. High pressure and high speed is the main feature of pressure casting. The commonly used pressure is tens of MPa, the filling speed (inner gate speed) is about 16 to 80 m/s, and the time for the metal liquid to fill the mold cavity is extremely short, about 0.01 to 0.2 seconds. Die-casting process is the die-casting machine, die-casting mold and alloy three elements of the organic combination and to be used in a comprehensive process. And die-casting when the metal according to the process of filling the cavity, is the pressure, speed, temperature and time and other process factors to get unified process. At the same time, these process factors and mutual influence, mutual constraints, and complement each other. Only the correct selection and adjustment of these factors, so that they are coordinated, in order to obtain the expected results. Therefore, in the die-casting process should not only pay attention to the casting structure of the craft, die-casting die advanced, die-casting machine performance and structural excellence, die-casting alloy selection of adaptability and melting process specification; should pay more attention to the pressure, temperature and time and other process parameters on the quality of the casting important role. In the die-casting process should pay attention to the effective control of these parameters.