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A Method for Predicting the Deformation of Aluminum Alloy Thin-walled Components During Machining

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

Active Publication Date: 2018-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • 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

Method used

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  • A Method for Predicting the Deformation of Aluminum Alloy Thin-walled Components During Machining
  • A Method for Predicting the Deformation of Aluminum Alloy Thin-walled Components During Machining
  • A Method for Predicting the Deformation of Aluminum Alloy Thin-walled Components During Machining

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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 the Legendre function;

[0045] The Legendre function is:

[0046]

[0047] In the formula, z' is the normalized depth;

[0048] The distribution of the residual stress σ' along the depth direction of the aluminum alloy billet is fitted as follows:

[0049]

[0050] where A i is the fitting coefficient.

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

The invention discloses a method for predicting the deformation amount produced by machining an aluminum alloy thin-walled component, which relates to a technology for predicting the deformation amount produced by machining an aluminum alloy thin-walled component, and belongs to the field of mechanical processing. In order to solve the problem of large amount of calculation in simulating the entire machining process of aluminum alloy thin-walled components in the prior art, it tests the residual stress of the billet and the surface residual stress of the aluminum alloy thin-walled component machining, and uses the equivalent surface layer The distribution of residual stress replaces the distribution of surface residual stress, and the residual stress of the billet is input into the ABAQUS finite element software to remove the parts that need to be removed during machining, and the equivalent surface residual stress is applied to the ABAQUS analysis model to calculate the The deformation of aluminum alloy thin-walled components under the combined action of the residual stress release and the residual stress of the machined surface can predict the deformation of aluminum alloy thin-walled components produced by machining. The invention can be used to predict the deformation generated by the machining of aluminum alloy thin-walled components.

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 Patents(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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