Friends who know something about precision machining should know that the processing of precision parts made of stainless steel compared to other materials parts will have more difficult problems, then today I will solve the problem for everyone:
Stainless steel precision parts processing is difficult, I do not know, difficult to process the reason also lies in the choice of tools, the following is a specific look at the material on the choice of tools, processing difficulties and solutions:.
First, in automatic lathe turning stainless steel, the general use of carbide tool materials are: YG6, YG8, YT15, YT30, YW1, YW2 and other materials; commonly used high-speed steel tool has: W18Cr4V, W6M05Cr4V2AL and other materials.
Second, the geometric angle of the tool and the selection of the structure is also particularly important: the
Front angle: general turning stainless steel tool front angle of 10 ° ~ 20 ° is more appropriate.
After the angle: generally take 5 ° ~ 8 ° more appropriate, the maximum is not 10 °.
Edge inclination angle: generally selected λ for -10 ° ~ 30 °.
Edge surface roughness should be no greater than Ra0.4 ~ Ra0.2.
Third, the difficulty of processing stainless steel parts are the following common types.
1, machining hardness resulting in faster tool wear, and difficult to chip removal.
2, low thermal conductivity causes plastic deformation of the cutting pin edge and tool wear faster.
3、Chip accumulation tumor is easy to cause the emblem small piece of powder chip left on the cutting pin edge, and cause bad machining surface.
4、The chemical relationship between the tool and the material to be machined causes machining hardening and low thermal conductivity of the material
to be machined, which not only easily causes unusual wear, but also tool chipping and abnormal rupture.
Fourth, the solution to the processing difficulties are as follows.
1, the use of high thermal conductivity of the tool.
2, sharp cutting edge edge line: chipbreaker slot edge band is wider, which can reduce the cutting pressure, so that the chip removal can be well
controlled.
3, the best cutting conditions: inappropriate processing conditions will reduce tool life.
4, choose the appropriate tool: stainless steel with a tool should have excellent toughness, cutting edge strength and the combination of coating film
should also be relatively high.
The above difficulties and countermeasures on the processing of stainless steel parts are shared here, I hope it will be helpful to all readers.