A Numerical Simulation Method of Temperature Field in SLM Forming Process

A technology of numerical simulation and forming process, applied in CAD numerical modeling, design optimization/simulation, calculation, etc., can solve the problems of limiting the development and application of numerical simulation of SLM forming process, insufficient calculation accuracy, etc., to reduce computer memory and storage. The effect of space, ensuring calculation accuracy, and accurate calculation results

Active Publication Date: 2022-02-11
XI AN JIAOTONG UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This defect limits the development and application of numerical simulation of SLM forming process
There is a way to reduce the calculation amount by increasing the size of the discrete unit as a whole, but it also brings the problem of insufficient calculation accuracy. Therefore, it is very necessary to reduce the calculation amount while ensuring the calculation accuracy.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Numerical Simulation Method of Temperature Field in SLM Forming Process
  • A Numerical Simulation Method of Temperature Field in SLM Forming Process
  • A Numerical Simulation Method of Temperature Field in SLM Forming Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Consider developing a calculation software based on this method to realize the temperature field simulation function.

[0068] (1) Establish a substrate model with a size of 20mm*20mm*10mm, and a sample model with a size of 10mm*10mm*1.5mm. The substrate material is 316L stainless steel, and the forming powder is 316L stainless steel powder.

[0069](2) The substrate model and the sample model are according to the E of 1mm*1mm*0.5mm L The unit is discrete, and a total of 9200 E L Unit, 9200 E L Units contain the powder units formed during the SLM powder spreading process. Among them, the substrate always exists, and the prototype is gradually generated during the forming process. The sample layer E that is being formed L Unit and its lower layer E L 8,000 sheet-type Es with a size of 1mm*1mm*0.05mm are obtained by finely segmenting the unit M unit so that 4×2×2 E L Unit contains all E M The unit is refined and divided to obtain 16,000 Es with a size of 0.1mm*0.1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a numerical simulation method for the temperature field in the SLM forming process. The method is based on the principle of finite difference, and adopts the cell nesting method to simulate the temperature field, which breaks through the finite element method and other finite difference methods with small simulation size and long calculation time. limit. Compared with the finite volume method, this method only uses small-sized discrete units around the molten pool with a large temperature gradient, and uses large-sized discrete units in areas far away from the molten pool and with small temperature gradients. The method of unit nesting reduces the number of involved The number of discrete elements to compute. Furthermore, by nesting the calculation time steps, the number of calculations between units can be reduced, thereby reducing the calculation amount of the SLM temperature field simulation calculation and maintaining high calculation accuracy. A new solution is provided for the numerical simulation of the temperature field of large-scale samples.

Description

technical field [0001] The invention belongs to the technical field of computer numerical simulation for additive manufacturing, and in particular relates to a numerical simulation method for a temperature field in an SLM forming process. Background technique [0002] The SLM forming process is affected by process parameters, and the formed parts are prone to defects such as curling, spheroidization, thermal deformation, and thermal cracks. The product structure and material requirements of SLM forming are changeable. The existing research mainly determines the process parameters through a large number of repeated experiments, which is not universal. The current high requirements for technical personnel, long preparation time and high manufacturing failure rate make it difficult for SLM technology to be widely used. [0003] Obtaining the temperature field of the SLM forming process through computer numerical simulation, especially the molten pool temperature, has become an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10G06F119/08
Inventor 张航朱硕赵懿臻李涤尘耿佳乐
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap