A Double Ellipse Exponentially Decaying Volume Heat Source Model for Simulating High Energy Beam Welding

A technology of high-energy beam welding and heat source model, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the difficulty of determining the energy distribution coefficient of the heat source and the inability to reflect the keyhole penetration effect, etc.

Active Publication Date: 2018-03-23
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unequal energy distribution before and after the heat source, the double ellipsoid heat source can better reflect the energy distribution of the actual welding pool than the rotating body heat source, but because the energy in the penetration direction in the model adopts a Gaussian attenuation method , as the penetration depth increases, the energy becomes smaller and smaller. When the weldment is too thick, the energy near the back of the weldment is almost zero, so the double ellipsoid heat source model cannot reflect the keyhole penetration of high-energy beam welding of large-thickness workpieces effect
The combined heat source model can have the advantages of surface heat source and body heat source. It can not only characterize the shape of the molten pool, but also reflect the penetration effect of small holes. It has strong applicability. However, due to the variety of heat sources, which combination of heat sources is better? The effect is difficult to choose, and the energy distribution coefficient between heat sources is not easy to determine
[0006] From the analysis of the above heat source model, it is not difficult to see that although the heat source model of high energy beam welding has been continuously improved, the simulated weld shape and temperature field are getting closer to the actual situation, but the existing heat source model still needs to be improved. The accuracy of the beam welding heat source model has a direct impact on the calculation results of the temperature field and welding residual stress of the high energy beam welding structure. In order to obtain a more accurate temperature field during the welding process, it is urgent to establish a new high energy beam welding heat source model

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 Double Ellipse Exponentially Decaying Volume Heat Source Model for Simulating High Energy Beam Welding
  • A Double Ellipse Exponentially Decaying Volume Heat Source Model for Simulating High Energy Beam Welding
  • A Double Ellipse Exponentially Decaying Volume Heat Source Model for Simulating High Energy Beam Welding

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0142] Such as figure 1 As shown, the shape parameters of the heat source model of the double ellipse exponential decay body described in this embodiment include the length of the front semi-axis a 1 , the length of the rear semi-axis a 2 , molten pool width b, inflection point penetration h, proportional coefficient between inflection point and axial length l, molten pool penetration H. Among them, the parameters other than the ratio coefficient l between the inflection point and the axial length can be measured according to the anatomical topography of the actual test weld, l can be measured by the transverse length at the inflection point of the actual weld anatomical topography and the corresponding semi-axis length a The ratio is obtained.

specific Embodiment approach 2

[0143] Such as and As shown, the energy distribution of the first half and the second half of the molten pool described in this embodiment is determined according to the length of the front semi-axis and the length of the rear semi-axis, and the energy distribution ratio of each part is the semi-axis length of the corresponding part and the semi-axis of the front and rear parts The ratio of length and .

specific Embodiment approach 3

[0144] According to the anatomical appearance of the actual test weld, the shape parameters of the heat source model of the double ellipse exponential decay volume are obtained, combined with the actual power of high-energy beam welding, and substituted into

[0145]

[0146]

[0147]

[0148]

[0149] , the corresponding heat flow expression can be obtained.

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

A double ellipse exponential decay body heat source model for simulating high-energy beam welding. The invention can adjust the parameters of the heat source model according to the actual weld shape of high-energy beam welding, and efficiently and accurately obtain high-energy beam welds consistent with the actual weld shape. It can accurately obtain the high-energy beam welding temperature field and stress field, and provide a powerful measurement reference for accurately predicting the stress and deformation of high-energy beam welding structures. The adjustable position of the inflection point in the model is helpful for the promotion of the model for high energy beam welding and hybrid welding simulation.

Description

【Technical field】 [0001] The invention relates to the technical field of welding numerical simulation, in particular to a high-energy beam welding heat source model, in particular to a double ellipse exponential decay volume heat source model for simulating high-energy beam welding. 【Background technique】 [0002] It is known that the innovation and progress of the manufacturing industry has attracted worldwide attention, and welding technology plays an irreplaceable role in national economic construction and social development; with the development of science and technology and the continuous increase of industrial demand, welding technology has Accounting for more and more weight, then the level of welding technology directly affects the quality of parts or products. Among them, the high-energy beam welding method is widely used in shipbuilding, automobiles, aerospace and other fields due to its advantages of fast welding speed, high production efficiency, high welding pre...

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): G06F17/50
Inventor 王涛吴艳明张成杰
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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