，作为一个科技类的毕业论文，精密铸造发展简介
Precision casting is a casting process that utilizes high-quality molds, waxes, and related materials. It is also referred to as lost wax casting, since waxes are used to form the parts. This process is primarily used in the production of complex parts, with smooth surfaces and sharp corners. This is due to the high accuracy and repeatability that it offers.
The process of precision casting begins with the selection of a wax that is matched to the material that is to be used for the casting. The wax is then cut, formed and machined into shape. Next, the wax is taken and placed into a mold cavity. The mold is typically made of a ceramic material, although other materials such as metal can also be used. The mold is then heated and the wax melts away, leaving behind a space for the molten metal to fill.
The molten metal, which can include a variety of metals, alloys, and other materials, is then poured into the cavity. The casting is then allowed to cool and the solidified metal is removed from the mold. It is then machined and polished to achieve the desired shape and finish.
There are various advantages to using the precision casting process. The most notable is the fact that it is highly accurate, with repeatability capable of maintaining part specifications and tolerances. Additionally, the cost per part using precision casting is typically lower than other casting processes such as sand casting or die casting.
The process has been around for centuries, and is still utilized today for many different applications. Historically, it was primarily used for producing jewelry such as rings, bracelets, and other small items. But over the years, it has become increasingly popular for producing other items such as clocks, watch cases, surgical instruments, and a variety of machine components.
In recent years, the process has been enhanced to include a variety of new technologies and materials to improve the accuracy and reduce the cost of production. Such advancements have included the use of computer aided design (CAD) and computer aided manufacturing (CAM) to create more precise molds and parts. In addition, new materials such as resins and investment materials have been developed that are more cost effective and require less time to cure.
These advancements, along with the continued development of new alloys, have helped to make the process more affordable, allowing for its wider use in a variety of industries. It is now commonly used in the production of medical, telecommunications, aerospace and automotive components, as well as in many mechanical applications.
In conclusion, precision casting is a very reliable and cost effective process for producing complex parts with high accuracy. With new advancements in materials and technology, the process is growing in popularity, being used in a number of different industries with great success.
