Arc additive manufacturing finite element modeling method

A technology of additive manufacturing and modeling methods, which is applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., and can solve problems such as violation of numerical simulation

Active Publication Date: 2017-08-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to clarify the additive area size, material parameters and arc additive process parameters before the arc additive manufacturing finite element modeling, but the additive area size is unknown before the arc additive manufacturing experiment, and the traditional modeling method must be The size parameters

Method used

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  • Arc additive manufacturing finite element modeling method
  • Arc additive manufacturing finite element modeling method
  • Arc additive manufacturing finite element modeling method

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Embodiment Construction

[0081] The following is based on figure 1 The specific embodiment of the present invention is further described:

[0082] The invention proposes a finite element modeling method for arc additive manufacturing. The simulation process of arc additive manufacturing combines arc shape simulation technology, droplet shape simulation technology and finite element simulation technology, and is verified by experiments. Determine the geometric dimensions of the life and death units in the additive area before the meta-modeling, and realize the accurate calculation of the finite element simulation of the arc additive manufacturing. The main process is as follows figure 1 shown. The present invention is realized through the following steps:

[0083] Step 1: Calculate the arc shape and determine the width of the life and death unit in the additive area;

[0084] Step 2: Calculate the shape of the droplet 4, and determine the height of the life and death unit in the additive area;

[0...

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Abstract

The invention discloses an arc additive manufacturing finite element modeling method. The method comprises the following steps of: calculating an arc shape and determining the width of an additive area birth-death element; calculating a molten drop shape and determining the height of the additive area birth-death element; establishing an arc additive manufacturing finite element geometric model according to the width of the additive area birth-death element and the height of the additive area birth-death element; correcting the arc shape and the molten drop shape through verifying the temperature distribution of the arc additive manufacturing finite element geometric model, so as to correct the arc additive manufacturing finite element geometric model. According to the method disclosed by the invention, the geometric size of the additive area birth-death element can be determined before the arc additive manufacturing finite modeling by adopting an arc additive manufacturing simulation process, combining an arc shape simulation technology, a molten drop shape simulation technology and a finite element simulation technology and carrying out experimental verification, so as to realize the correct calculation of arc additive manufacturing finite element simulation.

Description

technical field [0001] The invention relates to the field of arc additive manufacturing, in particular to a finite element modeling method for arc additive manufacturing. Background technique [0002] In recent years, additive manufacturing technology has developed rapidly as an emerging technology and has been continuously applied in industrial production. The forming materials are continuously developing from the initial light-curing resin to metal materials, and the forming structure is also developing towards large-scale integration. Arc additive manufacturing using arc as a heat source has the characteristics of high heat input, fast forming speed, low cost, and simple equipment. It is very suitable for large-scale integrated structural parts, including large-scale molds, large-scale aero-engines, and large-scale aircraft panels. . However, there are still many forming defects in the arc additive manufacturing process, and the physical mechanism of the forming process...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10G06F2119/08
Inventor 魏艳红欧文敏刘仁培赵文勇钱龙根
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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