Machining deformation control method of bushing thin-wall part

A technology of thin-walled parts and control methods, which is applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of large deformation of bushing thin-walled parts and difficult deformation control, etc., to ensure dimensional accuracy and surface roughness Cooperate, eliminate the clamping stress, and avoid the effect of workpiece stress concentration

Active Publication Date: 2015-03-04
PLA NO 5719 FACTORY
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of large processing deformation of bushing thin-walled parts in the state of the art, and the deformation is extremely difficult to control, and to provide a metho

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  • Machining deformation control method of bushing thin-wall part
  • Machining deformation control method of bushing thin-wall part
  • Machining deformation control method of bushing thin-wall part

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Embodiment Construction

[0024] refer to Figure 1-Figure 4 . figure 1 The thin-walled bushing shown is a typical aluminum alloy thin-walled part. Its material is 2A12-T4. Below, the inner hole is hollow. Under the action of the radial cutting force of the turning tool, the workpiece generates resonance and resonance, which seriously affects the design dimensions and smoothness of the thin-walled parts of the aluminum alloy bushing. When cutting, similar to intermittent processing, the cutting impact is relatively large, resulting in severe stress deformation.

[0025] According to the present invention, at first adopt the UGNX finite element analysis model file and the NX advanced simulation module that comprise solution file

[0026] NX.NASTRAN conducts stress finite element analysis to analyze the stress-strain state trend of machining and cutting. The analysis results are arranged from the minimum value to the maximum value to find out the stress deformation position and deformation cause of th...

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Abstract

The invention provides a machining deformation control method of a bushing thin-wall part, and aims to provide a deformation control method for effectively controlling the machining deformation of an aluminum alloy thin-wall part, enabling the deformation in a controllable range and having stable and reliable quality. The method is realized through the following technical scheme: the stress finite element analysis and the stress strain state tendency analysis are performed by a finite element analysis model file and a simulation module; the meshing is performed by a partitioning second-order 20-node hexahedral unit to find out specific deformation areas and deflections; a smallest deformation scheme is selected to formulate a process machining scheme; and the heat treatment destressing is added after the semi-finishing for removing the machining stress deformation generated in the semi-finishing, and then, the finishing is performed for controlling the roundness of an outer circle and an inner hole within 0.02 mm. The inner hole and the outer circle are finished by the numerical control turning, so that the wall thickness difference is not bigger than 0.01; and a clamping part is cut off, and an end surface is machined, so that the total length is guaranteed. The method solves the machining difficulties of the bushing thin-wall part; and the pass percent can be improved above 90%.

Description

technical field [0001] The invention relates to a method for controlling the deformation of bushing thin-walled parts, in particular to a method for controlling the processing deformation of high-precision aluminum alloy thin-walled parts. Background technique [0002] With the development of the aviation industry, high-strength aluminum alloy thin-walled parts have been widely used. But this kind of bushing thin-walled parts is easily deformed under the force in the process of processing, and the processed bushing thin-walled parts are not easy to meet the quality index requirements. In the cutting process of aluminum alloy thin-walled parts, how to eliminate and reduce, and effectively control the processing deformation of such thin-walled bushing parts is a subject of much concern in the aerospace manufacturing process. Existing processing technology cannot fundamentally solve this problem. class questions. Thin-walled bushing parts are a common type of thin-walled bush...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00F16C33/14
Inventor 向巧向苏林崔波罗国彬郑海凌
Owner PLA NO 5719 FACTORY
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