The production process of the machine refers to the whole process of making products from raw materials (or semi-finished products). For machine production, it includes the transportation and preservation of raw materials, production preparation, blank manufacturing, parts processing and heat treatment, product assembly, commissioning, painting and packaging, etc. The content of precision machining production process in Dalian is very extensive. Modern enterprises use the principles and methods of system engineering to organize and guide production, and regard the production process as a production system with input and output. In the process of metal precision machining and cutting, the cutting fluid is required to have a good cleaning effect, remove the generated chips, wear debris, iron powder, oil stain and sand particles, prevent the contamination of machine tool, workpiece and cutting tool, and keep the cutting edge of cutting tool or grinding wheel sharp without affecting the cutting effect. For oil-based cutting oil, the lower the viscosity, the stronger the cleaning ability. Especially for cutting oil containing light components such as kerosene and diesel, the better the permeability and cleaning performance.