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Machining method for rear shaft neck of aerial turbofan engine

A technology of a turbofan engine and a processing method, which is applied in the field of precision machining of aero-engine parts, can solve the problems of high processing cost, plastic deformation, and low processing accuracy, and achieves the effect of ensuring processing efficiency and quality.

Active Publication Date: 2014-04-23
GUIZHOU ZUNYI CHI YU PRECISION MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to: provide a kind of processing method of aviation turbofan engine rear axle journal, to solve the chipping, plastic deformation, high processing cost, difficult control of deformation amount, low machining accuracy and problems existing in the traditional rear axle journal processing process. low efficiency

Method used

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  • Machining method for rear shaft neck of aerial turbofan engine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Die forging is used to process the GH4698 alloy into a blank, check the dimensions of the blank by marking lines, determine whether the blank is qualified, and draw a reference line for processing. Rough machining: clamp the outer tube wall at the left end of the blank, rough turn the outer circular surface and end face at the right end of the blank, rough bore the inner hole, and remove the remaining material; clamp the outer tube wall at the right end of the blank, correct the inner hole, and rough turn the blank The outer circular surface and end surface of the left end, the inner hole is roughly bored, and the remaining material is removed, leaving a machining allowance of 2mm for each single side. Flaw detection: Ultrasonic flaw detector is used for detection to find parts defects and determine the quality of parts. Semi-finishing: special mandrel inner hole positioning and clamping, semi-finishing blank right end outer circular profile, outer circula...

Embodiment 2

[0037] Embodiment 2: Die forging is used to process the GH4698 alloy into a blank, check the dimensions of the blank by marking lines, determine whether the blank is qualified, and draw a reference line for processing. Rough machining: clamp the outer tube wall at the left end of the blank, rough turn the outer circular surface and end face at the right end of the blank, rough bore the inner hole, and remove the remaining material; clamp the outer tube wall at the right end of the blank, correct the inner hole, and rough turn the blank The outer circular surface and end surface of the left end, the inner hole is roughly bored, and the remaining material is removed, leaving a machining allowance of 2mm for each single side. Flaw detection: Ultrasonic flaw detector is used for detection to find parts defects and determine the quality of parts. Semi-finishing: special mandrel inner hole positioning and clamping, semi-finishing blank right end outer circular profile, outer circula...

Embodiment 3

[0038]Embodiment 3: Die forging is used to process the GH4698 alloy into a blank, check the dimensions of the blank by marking lines, determine whether the blank is qualified, and draw a reference line for processing. Rough machining: clamp the outer tube wall at the left end of the blank, rough turn the outer circular surface and end face at the right end of the blank, rough bore the inner hole, and remove the remaining material; clamp the outer tube wall at the right end of the blank, correct the inner hole, and rough turn the blank The outer circular surface and end surface of the left end, the inner hole is roughly bored, and the remaining material is removed, leaving a machining allowance of 2mm for each single side. Flaw detection: Ultrasonic flaw detector is used for detection to find parts defects and determine the quality of parts. Semi-finishing: special mandrel inner hole positioning and clamping, semi-finishing blank right end outer circular profile, outer circular...

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Abstract

The invention discloses a machining method for a rear shaft neck of an aerial turbofan engine, and belongs to the technical field of precision machining of components for an aerial engine. The method comprises the following steps: blank machining, coarse machining, flow detection, semi-finishing, surface corrosion, thermal treatment, finishing, five-axis machining, excircle grinding, cleaning detection and machining completion. According to the machining method provided by the invention, problems can be discovered in real time during the machining process through multi-step machining and detection of branch operation, the deformation is controlled, the method is beneficial to discovering the defects of die forging blanks of the components, schemes of solving and dealing with the problems can be quickly performed, and the machining efficiency and quality of products are ensured. Moreover, the strength of the components can be ensured and the materials can be saved by adopting die forging blanks; moreover, the multi-step machining and detection of branch operation are adopted, and are also beneficial to controlling overhigh production cost caused by production defects; the machining method is further convenient to design special measuring tools and clamping tools, so that the machining efficiency and quality of components are ensured.

Description

technical field [0001] The invention relates to the technical field of precision machining of aircraft engine parts, in particular to a machining method for the rear journal of an aviation turbofan engine. Background technique [0002] In a certain type of aviation turbofan engine in China, such as figure 1 The rear journal shown is a part of this type of engine, which is an important part to ensure the safe and stable operation of the engine. In order to meet the high-strength and lightweight design requirements in the aviation field, the rear journal is mostly made of high-strength, Manufacture of forgings of wear-resistant and corrosion-resistant aluminum alloys, titanium alloys or high-temperature alloys. [0003] In order to ensure the high strength and wear resistance of the finished rear journal, the processing material currently used is generally GH4698 superalloy, and its hardness reaches HB293-341. Due to the high hardness of this type of material, it becomes a di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/14
Inventor 陈泽红
Owner GUIZHOU ZUNYI CHI YU PRECISION MACHINERY MFG
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