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Method and system for estimating welding spot failure

A technology for solder joints and failure parameters, applied in the field of solder joint failure estimation methods and systems, can solve problems such as inability to large-scale deployment, complex simulation methods, and cumbersome applications.

Active Publication Date: 2021-05-18
上海中氐实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the solder joint failure simulation methods are relatively complicated, the simulation accuracy is not good, the application is relatively cumbersome, and the shortcomings of inability to automate large-scale deployment, so it is necessary to study the vehicle solder joint failure prediction method

Method used

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  • Method and system for estimating welding spot failure
  • Method and system for estimating welding spot failure
  • Method and system for estimating welding spot failure

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Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, on the one hand, the present invention provides a method for predicting solder joint failure, which includes:

[0049] Step S110, obtain the first feature information and second feature information matching the first connection object, the third feature information and fourth feature information matching the second connection object; before performing this step, it is necessary to import the collision finite element Model, the collision finite element model includes 1D units or 3D units for simulating solder joints and connection objects connected to the welding points, and the connection objects in the collision finite element model contain elastic-plastic material information and thickness information of each connection object. Generally, each solder joint includes a first connection object and a second connection object. For example, the first feature information of the first connection object can be the thickness information of the first c...

Embodiment 2

[0075] In yet another aspect, the present invention provides a prediction system for solder joint failure, which includes:

[0076] A collision finite element model, used to obtain first feature information and second feature information matching the first connection object, third feature information and fourth feature information matching the second connection object;

[0077] A calculation unit, configured to form a first failure parameter, a first calculation factor, and a second calculation factor according to the first feature information, the second feature information, the third feature information, and the fourth feature information; according to the first failure parameter, the second a calculation factor and a second calculation factor form first failure data and second failure data;

[0078] A failure collision model forming unit, configured to form a collision model of solder joint failure according to the first failure data and the second failure data;

[0079] T...

Embodiment 3

[0082] In yet another aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, wherein, when the program is executed by a processor, the method for predicting solder joint failure described in any one of the above items is implemented. Specifically: acquiring first feature information and second feature information matching the first connection object, third feature information and fourth feature information matching the second connection object;

[0083] Forming a first failure parameter, a first calculation factor, and a second calculation factor according to the first feature information, the second feature information, the third feature information, and the fourth feature information;

[0084] forming first failure data and second failure data according to the first failure parameter, the first calculation factor and the second calculation factor;

[0085] forming a collision model of solder joint failure acc...

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Abstract

The invention relates to the technical field of automobile computer aided design, in particular to a method for estimating welding spot failure. The method includes: obtaining first feature information and second feature information matched with the first connection object, and third feature information and fourth feature information matched with the second connection object; forming a first failure parameter, a first calculation factor and a second calculation factor according to the first feature information, the second feature information, the third feature information and the fourth feature information; forming first failure data and second failure data according to the first failure parameter, the first calculation factor and the second calculation factor; forming a welding spot failure collision model according to the first failure data and the second failure data; and obtaining welding spot failure risk parameters according to the collision model.

Description

technical field [0001] The invention relates to the technical field of computer-aided design of automobiles, in particular to a method and system for predicting failure of solder joints. Background technique [0002] Since the birth of the automobile assembly line, resistance spot welding has been an indispensable and important part of the manufacturing line. Due to the advantages of light weight, high static strength, good reliability, stable performance and easy automation, resistance spot welding has assumed 75% The above body connection work, the car body structure is almost all connected by metal thin-walled parts through resistance spot welding. A typical body structure contains about 4000-7000 solder joints. The diameter of the weld nugget and the distance between the weld joints are determined by the thickness of the connected sheet. Usually the diameter of the weld nugget is between 3-7mm, and the average value is generally 6mm. Therefore, the bonding strength of t...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/17G06F30/23G06F119/02G06F119/14
CPCG06F30/15G06F30/17G06F30/23G06F2119/02G06F2119/14
Inventor 丁巨岳
Owner 上海中氐实业股份有限公司
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