Selection of processing precision instruments

Fine parts processed from stainless steel have the advantages of corrosion resistance, long service life, and good mechanical and dimensional stability. Austenitic stainless steel fine parts have been widely used in medical, instrumentation and other fine machinery fields, but austenitic stainless steel data It has high strength, high plasticity and poor cutting performance, which is difficult to process.

During the practical processing of austenitic stainless steel, the cutting force is large and the processing vibration is obvious. In addition to reducing the durability of the machine tool, it will also cause problems such as poor machining accuracy, dimensional divergence, and low consumption efficiency. Reasons affecting the machining accuracy of parts.

Due to the high strength and plasticity of austenitic stainless steel, the work hardening phenomenon is obvious. Compared with the cutting strength of medium carbon steel (45#), the cutting strength of austenitic stainless steel is 25% greater than that of medium carbon steel; at the same time, austenite The thermal conductivity of stainless steel is only one-third of the medium carbon steel, and the high temperature during the cutting process makes the milling process worse.

The work hardening of stainless steel materials is serious, and the milling is intermittent cutting. The impact and vibration are too large, which makes the milling cutter easy to wear and chip. When using a small diameter end mill, it is very easy to break. In addition, once the milling process The durability of the tool is reduced, and the roughness and size of the machining of the fine parts of the stainless steel data cannot reach the corresponding request.