In the machining and manufacturing industry, high-speed machining is often used to process the automobile transmission housing. Although high-speed cutting technology has the advantages of high machining efficiency, small cutting force, reduced influence of cutting heat on workpiece, high machining accuracy and intensive process, the following problems are encountered at present:
- Lack of reasonable processing parameter selection scheme
As a new cutting method, high-speed cutting has no complete machining parameter table to choose from, and there are not many machining examples for reference. In high-speed cutting, most of them still rely on previous experience or carry out a large number of trial cuts to select parameters to achieve the best cutting effect. Finding reasonable machining parameters is a primary problem in the application of high-speed cutting.
- Lack of proper tool selection method
Cutting tool is a key problem in the popularization and application of high speed cutting. Because the cutting mechanism of high-speed cutting is completely different from traditional cutting, the wear mechanism and failure form of machining, the stress state of cutting tool and the cutting shape are different. In traditional milling, the main failure form of tools is flank wear, while in high-speed cutting, its failure form is completely different according to the processing conditions and workpiece materials, such as tool tip breakage, flank wear, tool rod fracture and other forms, and the effects of different combinations of tools and different workpiece materials are also different. How to choose a reasonable high-speed cutting tool, prolong the service life of the tool as much as possible and give full play to the performance of the tool is a very key technology for high-speed cutting technology.
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