Method for predicting and analyzing cutting deformation of thin-walled structural parts

A thin-walled structural part, cutting technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as low computational efficiency, unrealistic, and large computational resources consumption, and achieve accurate finite element analysis results. , the simulation results are accurate, the analysis results are efficient

Active Publication Date: 2018-06-19
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

However, the simulation calculation of cutting physics requires a lot of computing resources, and the calculation efficiency is low. It is unrealistic to perform cutting physics simulation of the complete part machining process.
In the existing research, scholars are committed to using certain technical means to simplify and equivalent the machining process of parts. For example, the more commonly used "unit life and death" technology can well simulate the process of material removal and blank initial stress release during machining

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  • Method for predicting and analyzing cutting deformation of thin-walled structural parts
  • Method for predicting and analyzing cutting deformation of thin-walled structural parts
  • Method for predicting and analyzing cutting deformation of thin-walled structural parts

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] The mechanism of the overall machining deformation of thin-walled parts lies in the workpiece blank containing initial residual stress. The stress field evolves gradually, and after the processing is completed and the clamping is removed, the internal stress field further evolves and causes the parts to deform, and finally reaches the state of internal stress self-balance. In order to predict and analyze the processing deformation of thin-walled structural parts, it is necessary to track the evolution process of the internal stress field under external influences, and to process the data through efficient computing means to obtain the final processing deformation.

[0034] The invention provides a method for predicting and analyzing the deformation of thin-walled structural parts during cutting. Based on the combination of finite element simulation ...

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Abstract

The invention discloses a method for predicting and analyzing cutting deformation of thin-walled structural parts. Based on combination of finite element simulation analysis and cutting force thermalcoupling theoretical modeling, the evolution process of blank structural parts with initial residual stress in an internal stress field during the coarse and fine cutting process to better reflect theimpact of body residual stress distribution of the structural parts after coarse processing on cutting residual stress distribution of a finish machining surface layer, and the impact of stress release of the structural parts after completion of the whole cutting process on processing deformation, and finally the prediction of machining residual stress and machining deformation can be achieved.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to a method for predicting and analyzing cutting deformation of thin-walled structural parts. Background technique [0002] Thin-walled structural parts have been widely used in many advanced manufacturing fields such as aerospace, energy, automobiles, and electronics, which can significantly improve equipment performance. For example, a large number of integral structural parts directly processed from large blanks are used on aircraft, which can significantly improve the strength of the fuselage and the accuracy of aerodynamic shape, reduce the weight of the fuselage, reduce parts and corresponding assembly workload, and improve the maneuverability and reliability of the aircraft. sex. However, the structural rigidity of thin-walled parts is poor, the material removal rate is high during processing, and the internal stress of the workpiece changes drastically during the processi...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2119/06
Inventor 马原冯平法郁鼎文许超
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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