Method and system for calculating storage energy field of steady-state cutting first deformation area

A calculation method and technology of deformation zone, applied in the field of machining, can solve problems such as many characteristic parameters and complex research process, and achieve the effect of clear explanation

Active Publication Date: 2021-03-05
SHANDONG UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings of the directionality of the stress field, many characteristic parameters, and complicated research process in the traditional cutting mechanism research, and aiming at the shortcomings of the existing technology, the present invention provides A calculation method and system for the stored energy field in the first deformation zone of steady-state cutting, using the stored energy distribution in the first deformation zone to predict cutting force, cutting temperature, chip morphology and material properties

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  • Method and system for calculating storage energy field of steady-state cutting first deformation area
  • Method and system for calculating storage energy field of steady-state cutting first deformation area

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Embodiment 1

[0033] In a typical implementation of the present invention, this embodiment discloses a calculation method for the stored energy field in the first deformation zone of steady-state cutting, including the following steps:

[0034] (1) Fit the parameters of the storage energy evolution model of the workpiece material based on the stress-strain curves of the workpiece material under different deformation conditions, and the model is related to temperature, strain, and strain rate. Stored energy E s The dislocation density ρ total means, that is:

[0035] E. g =αμb 2 ρ total / χ

[0036] Among them, α is the dislocation interaction parameter, which is 0.5; μ is the shear modulus of the material; b is the value of the Burgers vector; χ is the proportional coefficient considering the alloy elements, which is 0.6. Therefore, the establishment of the storage energy evolution model depends on the dislocation density evolution model, which can be divided into statistical storage d...

Embodiment 2

[0142] In a typical implementation of the present invention, this embodiment discloses a calculation system for storing the energy field in the first deformation zone of steady-state cutting, including:

[0143] Fitting unit, microelement generation unit and conversion unit, the fitting unit is used to fit the storage energy evolution model of the material, the microelement generation unit is used to divide the microelement in the first deformation zone; the conversion unit is used to convert the three-dimensional cutting model into 2D cutting model;

[0144] The solving module is used to receive the data output by the fitting unit, the micro-element generation unit and the conversion unit, calculate the strain and strain rate of each micro-element and analyze the temperature of each micro-element according to the output data of the conversion unit, and analyze the temperature of each micro-element according to the output data of the fitting unit The storage energy evolution m...

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Abstract

The invention discloses a method and a system for calculating a storage energy field of a steady-state cutting first deformation area, and belongs to the technical field of cutting machining. The method comprises the following steps: fitting storage energy evolution model parameters of a workpiece material; dispersing the first deformation area into a series of infinitesimal elements along the normal direction of the main shearing surface, and assuming that the strain, the strain rate and the temperature in each infinitesimal element are constants when the infinitesimal elements are small enough; introducing an equivalent cutting edge model, simplifying actual three-dimensional cutting into two-dimensional cutting, calculating the strain and strain rate of each infinitesimal according to ashearing surface model, and analyzing the temperature of each infinitesimal according to a heat conduction equation; deriving a differential equation of the stored energy to the position of the firstdeformation area by utilizing the stored energy evolution model and the distribution model of the strain rate, the strain and the temperature; and taking the initial shearing surface of the first deformation area as a model boundary, solving a differential equation of the storage energy of each infinitesimal element to the position according to the initial shearing surface to obtain the storage energy of each position, and obtaining the storage energy field distribution of the first deformation area.

Description

technical field [0001] The invention belongs to the technical field of cutting processing, and in particular relates to a calculation method and system for storing an energy field in a first deformation zone of steady-state cutting. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Metal cutting is one of the important processes in the forming of metal materials and the production of mechanical parts. Its process is a complex thermal-mechanical coupling process involving multiple fields of machinery-mechanics-materials, including elastic-plastic large deformation, high temperature and high strain rate, severe friction, and material failure. And so on a series of phenomena. Therefore, it is very important to study the cutting mechanism to find out the relationship between the input (such as machine tool system, processing parameters, tool parameters,...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14G06F2113/24G06F2111/10G01N3/24
Inventor 黄传真汤正义刘含莲朱洪涛邹斌姚鹏王军
Owner SHANDONG UNIV
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