What is precision machining without any flaw?

Why is precision machining always concerned?
Take the submarine as an example. After diving for a period of time, it is necessary to verify the positioning. However, if the accuracy of the gyroscope bracket is high enough, the submarine does not need to come out. This high-precision bracket can only be processed by ultra precision machine tools. This shows the importance of precision machining.
Top level slow wire processing technology, the top level slow wire processing machine represents the highest level at present, and the precision of the processed parts is very high, which can be guaranteed to be within ± 0.002mm... Not to mention, just watch the video directly.
The slow threading machine tool is divided into four grades: top grade, top grade, middle grade and entry-level.

1. Top slow wire feeding machine tool
The machining accuracy of this type of machine tool can be guaranteed to be within ± 0.002mm, the maximum machining efficiency can reach 400 ～ 500mm2/min, and the surface roughness can reach Ra0.05 μ m. It has perfect machining surface quality, almost no metamorphic layer on the surface, and can be used Φ 0.02mm electrode wire is used for micro finishing. Most hosts have a thermal balance system, and some machine tools use oil for cutting. This kind of machine tool has complete functions and high degree of automation. It can directly finish the precision machining of moulds. The service life of the moulds processed has reached the level of mechanical grinding.

2. High grade slow threading machine tool
This kind of machine tool has the function of automatic threading, no resistance anti electrolysis power supply, integral thermal constant system, and can adopt Φ 0.07 ㎜ electrode wire shall be cut with an accuracy of ± 0.003 ㎜, the maximum machining efficiency shall be more than 300 ㎜ 2/min, and the surface roughness shall be Ra<0.2 μ m. It has the function of timely detecting the change of workpiece section and optimizing the discharge power in real time. This kind of machine tool is also widely used for precision stamping die processing.

3. Medium grade slow wire feeding machine tool
This machine tool generally adopts the non resistance anti electrolysis power supply, which has the functions of immersion machining and taper cutting. The practical maximum processing efficiency is 150 ～ 200 ㎜ 2/min, and the optimal surface roughness is Ra ＜ 0.4 μ m. The cutting accuracy can reach ± 0.005 ㎜, generally Φ The electrode wire of 0.1mm and above shall be cut. The anti-collision protection system shall be equipped to avoid the collision damage caused by programming error or misoperation. The automatic threading mechanism shall be equipped or optional.

4. Entry level slow threading machine tool
This machine tool generally uses the process of cutting one to repair one, cutting one to repair two, which can stabilize the surface finish to Ra0.8 μ M, and the machining accuracy is ± 0.008 ㎜. Most of them can only use electrode wires of 0.15 mm and above for cutting. There is a certain gap between the machined surface microstructure and corners and advanced machine tools.