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Method predicting deformation quantity produced during aluminum alloy thin wall member machine processing

A technology of thin-walled components and aluminum alloys, which is applied in the field of machining, can solve the problems of predicting machining deformation, complex machining process, and large amount of calculation, so as to optimize machining parameters, accurately predict deformation, and reduce calculations. volume effect

Active Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that it is difficult to use a computer to simulate the entire machining process of an aluminum alloy thin-walled component to predict the machining deformation due to the complexity of the machining process and the large amount of calculation, thereby providing a method for predicting the aluminum alloy thin-walled component. Method of Deformation Amount Produced by Component Machining

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  • Method predicting deformation quantity produced during aluminum alloy thin wall member machine processing
  • Method predicting deformation quantity produced during aluminum alloy thin wall member machine processing
  • Method predicting deformation quantity produced during aluminum alloy thin wall member machine processing

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specific Embodiment approach 1

[0032] Specific implementation mode one: refer to figure 1 Specifically explaining this embodiment, a method for predicting the amount of deformation produced by machining an aluminum alloy thin-walled component, the method includes the following steps:

[0033] Step 1: Using the crack flexibility method to test the residual stress of the aluminum alloy billet, obtain the distribution of the residual stress of the aluminum alloy billet along the depth direction, and fit the distribution of the residual stress;

[0034] Step 2: using the XRD (X-ray diffraction) residual stress test method to obtain the distribution of the surface residual stress along the depth direction of the machined aluminum alloy thin-walled component, and to fit the distribution of the surface residual stress;

[0035] Step 3: Replace the fitted surface residual stress distribution obtained in step 2 with the new surface residual stress σ, that is, the distribution of the equivalent surface residual stres...

specific Embodiment approach 2

[0044] Specific embodiment 2: This embodiment is a further description of the method for predicting the deformation of aluminum alloy thin-walled components described in specific embodiment 1. In this embodiment, the distribution of residual stress in step 1 The fitting is realized by Lagrangian polynomial function;

[0045] The Lagrange polynomial function is:

[0046] L i ( z ′ ) = ( d dz ′ ) n [ ( z ′ 2 - ...

specific Embodiment approach 3

[0051] Specific embodiment three: This embodiment is a further description of the method for predicting the deformation of aluminum alloy thin-walled components described in specific embodiment one. In this embodiment, the residual stress distribution of the surface layer in step two The fitting of is realized by Lagrangian polynomial function.

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Abstract

A method predicting deformation quantity produced during aluminum alloy thin wall member machine processing, relates to the technical field of prediction for deformation quantity during aluminum alloy thin wall member machine processing and belongs to the field of machinery processing. A problem of large simulation calculation amount during the whole machine processing for the aluminum thin wall component in the prior art can be solved. Billet residual stress and surface layer residual stress of the aluminum alloy thin wall component machine can be measured; distribution of equivalent surface layer residual stress replaces distribution of the surface layer residual stress; the billet residual stress is input to an ABAQUS finite element software; parts to be removed during the processing are removed; the equivalent surface layer residual stress is applied to the ABAQUS analysis model; and the deformation quantity of the aluminum alloy thin wall component due to the co-action of the release of the billet residual stress and machine processing surface layer residual stress is calculated, so deformation quantity produced during aluminum alloy thin wall member machine processing can be predicated. The method can be applied to prediction for deformation quantity produced during aluminum alloy thin wall member machine processing.

Description

technical field [0001] The invention relates to a technology for predicting machining deformation of an aluminum alloy thin-walled component, and belongs to the field of machining. Background technique [0002] With the development of aviation and aerospace technology, aerospace has become a high-tech-intensive industry. Aluminum alloy thin-walled or frame-like integral components are more and more widely used in aerospace, weaponry, precision instruments and other industries, and the requirements for the accuracy of parts are also constantly improving. Aluminum alloy thin-walled components are affected by the residual stress of the billet and the residual stress of machining, and are prone to large processing deformation. Processing deformation is one of the most prominent problems faced by the manufacturing technology of aerospace structural parts. With the development of computer technology, using computer to calculate the deformation of aluminum alloy thin-walled compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 姜建堂董亚波邵文柱甄良
Owner HARBIN INST OF TECH
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