Machining process and tool for shaft with inner step hole with large depth-diameter ratio

Abstract

The invention provides a machining process and tool for a shaft with an inner step hole with a large depth-diameter ratio. The process includes the steps of preparing a workpiece blank first, drilling a middle hole, finely boring the middle hole, honing the middle hole, boring on a large hole in a push mode, drilling a small hole, conducting rotary swaging shaping, machining the outer circle, and finally drawing out a combined core shaft, wherein the combined core shaft is formed by connecting a large-end core shaft, a middle core shaft and a small-end core shaft through threads. Through the machining process and tool, hole drilling straightness is improved remarkably, the reject rate is reduced, and meanwhile mechanical properties of a workpiece are enhanced.

Description

technical field [0001] The invention relates to the technical field of manufacturing thin-walled slender shaft parts with a large depth-to-diameter ratio, and in particular to a processing technology and tool for a shaft with a large depth-to-diameter ratio in a stepped inner hole. Background technique [0002] The thin-walled slender shaft with large depth-to-diameter ratio plays a key role in high-speed rotating mechanisms, especially in aero-engines and gas turbines. The parts are subjected to alternating bending and torsional stresses, and the processing quality of the parts affects the safety and reliability of the engine. sex. The processing technology of thin-walled slender shaft is one of the key manufacturing technologies of aero-engines, and it is an indispensable aspect to strengthen the core of my country's aero-engine industry and comprehensively develop aerodynamic technology. [0003] The current processing technology is: blank—drilling middle hole—drilling s...

AI Technical Summary

Problems solved by technology

[0004] The main problems with traditional manufacturing methods are the unevenness of shaft coaxiality and wall thickness distribution, which affects the performance

Due to the large depth of the inner hole of the slender shaft step, the drilling tool is long and the diameter is small, and the drilling deviation and the dimensional accuracy of the hole cannot be avoided during the machining process.

At present, the advanced machine tools at home and abroad are unable to solve the coaxiality and hollowness of the deep hole drilling of the slender shaft stepped inner hole

There are no literature reports on the related process

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