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

A technology of processing technology and aspect ratio, which is applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc. And the problem of uneven wall thickness distribution, long diameter of drilling tools, etc., to save processing economic costs, improve mechanical properties, improve coaxiality and straightness

Active Publication Date: 2015-06-24
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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 a

Method used

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

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Embodiment Construction

[0043] Further illustrate the present invention below in conjunction with accompanying drawing.

[0044] Taking the shaft of the inner hole of the three-step step as an example, a processing technology of the shaft with a large depth-to-diameter ratio of the stepped inner hole includes the following steps:

[0045] 1) Prepare the workpiece blank: the length of the workpiece blank is L-Δ, where L is the total length value required by the design, and Δ is the forging elongation, which needs to be taken according to the computer numerical simulation and experimental results. circle, drill the center hole, turn the reference outer circle at both ends, chamfer both ends, and get the workpiece 1;

[0046] 2) Drill the middle hole: refer to figure 1 , place the workpiece 1 on the deep space drilling machine, distribute two support frames 2 evenly along the axial direction of the workpiece 1, and then drill the middle hole. The diameter of the drill hole is 0.1-0.2mm larger than the ...

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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...

Claims

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Application Information

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IPC IPC(8): B23P15/14B23Q3/14B23B35/00B23B41/02B23Q1/76
CPCB23B35/00B23B41/02B23P15/14B23Q1/76B23Q3/14
Inventor 张琦张以升王聚存郑学著王威马小伟
Owner XI AN JIAOTONG UNIV
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