End mill and rotating shaft beam airfoil hyperboloid milling method based on end mill

Abstract

The invention discloses an end mill and a rotating shaft beam airfoil hyperboloid milling method based on the end mill, the end mill is suitable for efficient machining and forming of small-curvature hyperboloids, and the radian of a contact point of a cutter and a material is increased in cutter bottom edge machining, so that the cutting line spacing can be increased; the problem that the row spacing is small when a large-R bull-nose milling cutter is used for machining a curved surface through a fixed shaft is effectively solved, the part machining efficiency is improved by times, and meanwhile, a large amount of manual polishing by bench workers is eliminated. When the curved surface of the wing surface of the rotating shaft beam is milled, under the condition that the cutting linear speed, the feeding amount per tooth and the cutting residual height are not changed, the cutting efficiency is improved by about 5 times compared with that of a five-tooth integral hard alloy milling cutter used in an original process, so that the part surface line cutting time is about 40 min; and meanwhile, the cutting surface quality is improved, the surface texture is uniform, smooth and free of sticky chips; and the size precision of the machined curved surface completely meets the inspection requirements, a large amount of manual polishing of bench workers is eliminated, and the practicability is good.

Description

technical field [0001] The invention belongs to the technical field of aviation precision manufacturing and processing, and in particular relates to an end mill and a hyperboloid milling method for a shaft beam wing surface based on the end mill. Background technique [0002] The complex rotating components on the aircraft not only have the high-precision characteristics of the rotating structure, but also have the characteristics of the complex structure of the non-rotating parts, and the size is large. The aircraft shaft beam is a typical complex rotary structure, and its parts are composed of a circular shaft section and a wing box section. The circular shaft section is mainly processed by turning technology, and the wing box section is mainly processed by milling technology. The airfoil surface of the wing box section is a typical hyperboloid, which is in the shape of a convex arc, such as figure 1 As shown, the curvature of the curved surface of the airfoil is small, b...

AI Technical Summary

Problems solved by technology

At the same time, TC21 titanium alloy difficult-to-cut materials are widely used in the shaft beam parts. In this process, there are many difficulties and problems that restrict the efficient machining of the shaft beam wing surface:

[0004] (2) On the CNC machine tool, the fixed-axis line cutting is used to process the curved surface. The bottom cutting edge of the tool cannot form a geometric mesh with the curved surface. There are local overcuts or undercuts on the surface of the curved surface. It is necessary to manually polish the surface of the curved surface by a fitter. The processing quality of the product largely depends on the experience of the workers, and the technical level of the workers is extremely high, and the stability of the product quality is poor.

[0005] Aeronautical precision manufacturing puts forward higher and higher requirements on the processing quality and processing efficiency of curved surfaces. The traditional manufacturing process of end mill line cutting and manual grinding can no longer meet the needs of hyperboloid cutting of aircraft shaft beam wing surfaces. It is urgent to explore an efficient and high-quality surface milling solution

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