An indexable turning insert

Abstract

The invention discloses an idexable turning blade. A second rake face, a first chip breaker groove bottom arc, and a second chip breaker groove bottom arc are sequentially in smooth tangential connection, and jointly form a complete, unobtrusive smooth surface, so that the blade chip breaker groove is of a complex curved surface structure with a variable rake angle (alpha), a variable groove depth(H), a variable groove width (W2), and a variable radius (R1 and R2); and the sharpness of the blade under small cutting parameters is ensured to make the cutting simple and fast and the chip be smoothly guided for flowing, curled, and snapped, thereby achieving the precise control of the chip. Meanwhile, the stress rationality of the blade under large cutting parameters is ensured; the cutting edge intensity of the blade is improved by arranging of the variable rake angle structure; the chip-containing space of the chip breaker groove is enlarged by changing the depth and width of the chip breaker groove; and the working condition is more stable. The applicative cutting machining parameters of the idexable turning blade comprise a part of finishing parameters, all radius machining parameters, and a part of rough machining parameters.

Description

technical field [0001] The invention relates to the field of metal cutting, in particular to an indexable turning insert. Background technique [0002] In recent years, with the changes in the working conditions, materials, cutting parameters, and processing efficiency requirements of turning processing, the market demand for turning insert geometries has also changed. In order to reduce processing costs in the field of machinery manufacturing, there are more and more urgent demands for high-quality, high-efficiency, and cost-effective CNC turning inserts with strong general performance. Nowadays, in most turning processing occasions, in order to save cost and time, the factory usually completes the rough machining process to the finishing process of the processed workpiece on the same CNC machine tool with the same blade, but the same blade cannot satisfy both finishing and semi-processing. Finishing and roughing cutting parameter requirements, that is, it is impossible to...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN103008697A discloses a turning insert, by setting a small bump and a large chip breaker in the shape of a cam that is closely connected to the small bump in the edge angle plane of the blade to meet the requirements of different cutting depths and feed conditions. Chip control, but this structural design still has some shortcomings in processing the outer circle and end face processing to guide the chip

[0005] US patent document US5372463A discloses a turning insert, the chip breaker cone is placed behind the cutting edge to guide the narrow chips formed when the depth of cut is small, and the other two side surfaces are placed on the chip surface of the main cutting edge The inner side also guides narrow chips. This structure has good chip control at small depth of cut and proper feed, but as the depth of cut and feed increase, the chip control effect of the chip breaker weakens, resulting in poor chip control.

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