Dull standard of end milling cutter for small turning milling compound machining
When the end milling cutter is worn to a certain limit, it cannot be used for small turning milling combined processing. This wear limit is called the bluntness standard.
The blunting standard of end milling cutter shall be formulated mainly based on the specific conditions of turning and milling and the requirements for processing quality. Specifically, the following principles shall be met:
1. The bluntness standard of small diameter end milling cutter should not exceed the critical value of severe tool wear;
2. When the rigidity of the process system is poor, a smaller blunt standard shall be specified;
3. When turning and milling work-piece materials with poor heat resistance or temperature rise sensitive to wear, the bluntness standard shall be appropriately reduced;
4. When the machining accuracy and surface requirements are high, the blunt standard shall be reduced.
If the blunting standard is too large, it will lead to excessive cutting force, which will aggravate the deformation and vibration of the process system, and therefore cannot meet the quality requirements of turning milling composite processing. Therefore, on the basis of these principles, the dulling standard should be increased as much as possible in order to make full use of tools and improve tool durability.