Dalian precision machining is a process of changing the workpiece, which is divided into cold machining and hot machining. Precision machining is a process of changing the overall dimension or performance of the workpiece with machining machinery. According to the temperature state of the workpiece to be processed, it is divided into cold processing and hot processing. It is generally processed at room temperature and does not cause chemical or phase changes of the workpiece.

It is called cold working. Generally, processing above or below normal temperature will cause chemical or phase changes of the workpiece, which is called hot processing. Cold working can be divided into cutting and pressure machining according to the difference of machining methods. Hot working commonly includes heat treatment, forging, casting and welding. Precision machining is a kind of processing technology, which makes the machined parts meet the line position tolerance required by the drawing.

Its performance characteristics and appearance structure will change to a certain extent. With machining, there are corresponding parts naturally. As a discipline of mechanical specialty, mechanical part design is not only one of the popular majors for science students, but also one of the engineering majors. At present, this major not only needs good knowledge of science and engineering.

It also needs excellent painting ability and spatial imagination. Due to the development of domestic industry and the changing demand, the demand for personnel in the machining industry is also increasing. Machining has changed a lot, and the direction is becoming more and more detailed. Precision machining technology also stands out. Precision parts are more or less used in many industries, such as household appliances, automobiles, hardware and medical products.