CN-115130321-B - Electromagnetic pulse welding spot intermetallic compound dynamic growth simulation method

Abstract

The invention relates to the field of electromagnetic pulse welding, and provides an electromagnetic pulse welding spot intermetallic compound dynamic growth simulation method which comprises the steps of pre-storing welding spot distribution characteristics of each intermetallic compound during welding, obtaining a welding spot to-be-monitored area and a movement track, obtaining multidimensional distribution characteristics of the welding spot in the to-be-monitored area according to the welding spot movement track of the welding spot, comparing the multidimensional distribution characteristics with the pre-stored welding spot distribution characteristics of the intermetallic compound of corresponding types, dynamically updating the welding spot distribution characteristics of each intermetallic compound during welding, taking the welding spot distribution characteristics at the moment as a final form of welding spot growth when the welding spot distribution characteristics change in a set time period is smaller than a set value, dividing the time period into a plurality of sub-time periods, respectively obtaining the welding spot distribution characteristics and the time domain characteristics of each sub-time period, coupling the welding spot distribution characteristics of each sub-time period with the corresponding time domain characteristics, and simulating a intermetallic compound dynamic growth process.

Inventors

• ZHANG LONG
• HU YONGLIANG
• YIN LIMENG
• CHEN YUHUA
• ZHANG HEHE
• ZHANG LIPING
• YAO ZONGXIANG
• NI JIAMING
• WANG GANG

Assignees

• 重庆科技学院
• 南昌航空大学

Dates

Publication Date

20260512

Application Date

20220721

Claims (7)

1. 1. The electromagnetic pulse intermetallic compound dynamic growth simulation method for the welding spots is characterized by comprising the following steps of: pre-storing the distribution characteristics of welding spots of each intermetallic compound during welding; acquiring a region to be monitored of a welding spot and a welding spot action track; Obtaining multidimensional distribution characteristics of welding spots when the welding spots are generated according to the action track of the welding spots in the area to be monitored, and comparing the multidimensional distribution characteristics with the prestored welding spot distribution characteristics of the corresponding type of intermetallic compounds; dynamically updating the distribution characteristics of welding spots of each intermetallic compound during welding; When the change of the welding spot distribution characteristic in a set time period is smaller than a set value, taking the welding spot distribution characteristic at the moment as a final form of welding spot growth, dividing the time period into a plurality of sub-time periods, and respectively acquiring the welding spot distribution characteristic and the time domain characteristic of each sub-time period; and coupling the distribution characteristics of the welding spots of each sub-time period with the corresponding time domain characteristics, and simulating the dynamic growth process of the intermetallic compound.
2. 2. The method for simulating dynamic growth of electromagnetic pulse welding spot intermetallic compounds according to claim 1, wherein the area to be monitored of the welding spot and the action track of the welding spot are obtained through a matrix array pressure sensor group and an image sensing module.
3. 3. The method for simulating the dynamic growth of the electromagnetic pulse welding spot intermetallic compound according to claim 2, wherein when the area to be monitored of the welding spot and the action track of the welding spot are obtained through the matrix array pressure sensor group and the image sensing module, each pressure sensor is numbered according to the position of the pressure sensor in the matrix array, and when the pressure sensor corresponding to the number senses the pressure change, the action track of the welding spot is calculated according to the sensed pressure change value and the welding spot image sensed by the image sensing module.
4. 4. The method for simulating dynamic growth of electromagnetic pulse welding spot intermetallic compounds according to claim 3, wherein the image of the welding spot is sensed by the image sensing module, and the area to be monitored of the welding spot is defined in the sensing area range of the matrix array sensor group by the sensed image of the welding spot.
5. 5. The method for simulating dynamic growth of electromagnetic pulse welding spot intermetallic compounds according to claim 2,3 or 4, wherein the welding spot action track is in the range of a welding spot area to be monitored, and the welding spot area to be monitored is smaller than the sensing area range of a matrix array sensor group.
6. 6. The method for simulating dynamic growth of electromagnetic pulse welding spot intermetallic compounds according to claim 1, wherein the pre-stored weld distribution characteristics of each intermetallic compound at the time of welding include a fusion relation of every two intermetallic compounds at the time of welding and a position distribution profile of the intermetallic compounds at the time of fusion.
7. 7. The method for simulating dynamic growth of intermetallic compounds of electromagnetic pulse welding spots according to claim 6, wherein the method is characterized in that the multidimensional distribution characteristics of the welding spots when generated are obtained according to the action track of the welding spots in the area to be monitored, and the multidimensional distribution characteristics are compared with the prestored distribution characteristics of the welding spots of the intermetallic compounds of the corresponding types, specifically: And comparing and correspondingly acquiring the fusion relation of the welding spot during welding and the position distribution profile of the intermetallic compound during fusion with the fusion relation of every two intermetallic compounds during welding and the position distribution profile of the intermetallic compound during fusion prestored, and identifying the type of the intermetallic compound.

Description

Electromagnetic pulse welding spot intermetallic compound dynamic growth simulation method Technical Field The invention relates to the field of electromagnetic pulse welding, in particular to a method for simulating dynamic growth of an intermetallic compound of an electromagnetic pulse welding spot. Background With the development of electronic information technology, the application range of electromagnetic pulse welding technology is wider, and electromagnetic pulse welding is a solid state welding process, and two workpieces can be welded together by utilizing magnetic force. The advantage of using electromagnetic pulse welding is that the formation of brittle intermetallic phases is avoided. Meanwhile, the electromagnetic pulse can weld metal and nonmetal materials of different materials, does not generate extra heat, and can finish high-quality welding of similar and different metals within a few microseconds without shielding gas or welding materials, so that the electromagnetic pulse is applied to more and more precise welding occasions. Although the electromagnetic pulse welding does not produce a solidified welding spot when the electromagnetic pulse welding is used, as the electromagnetic pulse welding can lead the object to be welded to be in instantaneous contact and fusion in a short time, the object to be welded can also produce fine deformation when the object to be welded is in welding fusion, and an energy emitting point for deforming the object to be welded can also be regarded as a welding spot, commonly called a welding spot, and at present, no simulation method for the dynamic growth of the intermetallic compound of the electromagnetic pulse welding spot exists. Disclosure of Invention The invention aims to provide a method for simulating the dynamic growth of an intermetallic compound of an electromagnetic pulse welding spot, which can simulate the dynamic growth process of the electromagnetic pulse welding spot, thereby realizing high-precision electromagnetic pulse welding by utilizing the dynamic distribution rule of the welding spot. The invention solves the technical problems and adopts the following technical scheme: the electromagnetic pulse welding spot intermetallic compound dynamic growth simulation method comprises the following steps: pre-storing the distribution characteristics of welding spots of each intermetallic compound during welding; acquiring a region to be monitored of a welding spot and a welding spot action track; Obtaining multidimensional distribution characteristics of welding spots when the welding spots are generated according to the action track of the welding spots in the area to be monitored, and comparing the multidimensional distribution characteristics with the prestored welding spot distribution characteristics of the corresponding type of intermetallic compounds; dynamically updating the distribution characteristics of welding spots of each intermetallic compound during welding; When the change of the welding spot distribution characteristic in a set time period is smaller than a set value, taking the welding spot distribution characteristic at the moment as a final form of welding spot growth, dividing the time period into a plurality of sub-time periods, and respectively acquiring the welding spot distribution characteristic and the time domain characteristic of each sub-time period; and coupling the distribution characteristics of the welding spots of each sub-time period with the corresponding time domain characteristics, and simulating the dynamic growth process of the intermetallic compound. Further, the area to be monitored of the welding spots and the action track of the welding spots are obtained through the matrix array pressure sensor group and the image sensing module. Further, when the area to be monitored of the welding spots and the action track of the welding spots are obtained through the matrix array pressure sensor group and the image sensing module, numbering is carried out on each pressure sensor according to the positions of the pressure sensors in the matrix array, and when the pressure sensor corresponding to the numbering senses pressure change, the action track of the welding spots is calculated according to the sensed pressure change value and the welding spot image sensed by the image sensing module. Further, the image sensing module senses the welding spot image, and the sensing area of the welding spot to be monitored is defined in the sensing area range of the matrix array sensor group through the sensed welding spot image. Further, the action track of the welding spot is in the range of the area to be monitored of the welding spot, and the area of the monitor to be monitored of the welding spot is smaller than the range of the sensing area of the matrix array sensor group. Further, the pre-stored welding spot distribution characteristics of each intermetallic compound during welding comprise the fusion relation of e