CN-122018388-A - Aluminum alloy rivet welding control method and system for car body door frame structure

CN122018388ACN 122018388 ACN122018388 ACN 122018388ACN-122018388-A

Abstract

The invention discloses an aluminum alloy rivet welding control method and system for a vehicle body door frame structure, and relates to the technical field of rivet welding, wherein the technical scheme is characterized by comprising the following steps of collecting characteristic information of aluminum alloy parts of the current vehicle body door frame structure to be rivet welded; the method comprises the steps of screening out similar rivet welding characteristic component groups and different rivet welding characteristic component groups according to characteristic information of aluminum alloy components, counting rivet welding point distribution characteristics of the similar rivet welding characteristic component groups to obtain a rivet point density distribution information set, carrying out processing analysis on association relations between rivet welding strength and deformation change trend values of the similar rivet welding characteristic component groups under the preset welding parameter condition to obtain a first rivet welding association characteristic coefficient, and extracting out a historical difference region rivet welding piece according to the different rivet welding characteristic component groups.

Inventors

SUN ZHENFENG

Assignees

合肥哈工汽车智能系统有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The aluminum alloy rivet welding control method for the car body door frame structure is characterized by comprising the following steps of: collecting characteristic information of an aluminum alloy part of a current car body door frame structure to be riveted and welded; screening out similar rivet welding characteristic component groups and different rivet welding characteristic component groups according to the characteristic information of the aluminum alloy components, and counting the rivet welding point distribution characteristics of the similar rivet welding characteristic component groups to obtain a rivet point density distribution information set; Carrying out processing analysis on the association relation between the rivet welding strength and the deformation variation trend value of the similar rivet welding characteristic component group under the condition of preset welding parameters to obtain a first rivet welding association characteristic coefficient; extracting a history difference region rivet welding part according to the difference rivet welding characteristic part group, and carrying out processing analysis on the association relation between the rivet welding strength and the deformation variation trend value of the history difference region rivet welding part under the condition of preset welding parameters to obtain a second rivet welding association characteristic coefficient; Establishing a rivet welding quality control prediction model according to the rivet point density distribution information set, the first rivet welding association characteristic coefficient and the second rivet welding association characteristic coefficient, predicting to obtain a self-adaptive rivet welding parameter set, and extracting a superposition rivet welding parameter part and a difference rivet welding parameter part from the self-adaptive rivet welding parameter set; And carrying out verification treatment on the differential rivet welding parameter part according to the first rivet welding association characteristic coefficient and the self-adaptive rivet welding parameter set to obtain a verification rivet welding parameter part, and outputting an aluminum alloy rivet welding control parameter result of the vehicle body door frame structure after carrying out parameter integration on the verification rivet welding parameter part and the superposition rivet welding parameter part.
2. The method for controlling aluminum alloy rivet welding of a door frame structure of a vehicle body according to claim 1, wherein the rivet welding point distribution characteristics of the similar rivet welding characteristic component group are counted to obtain a rivet point density distribution information set, and the method specifically comprises the following steps: counting the distribution density status information of the rivet welding points of the similar rivet welding characteristic component groups; and counting distribution characteristics of the sparse and dense distribution areas of the rivet points according to the dense distribution condition information of the rivet points to obtain a sparse and dense distribution information set of the rivet points.
3. The aluminum alloy rivet welding control method of a vehicle door frame structure according to claim 2, wherein the method is characterized in that the association relation between the rivet welding strength and the deformation variation trend value of the similar rivet welding characteristic component group is processed and analyzed under the condition of preset welding parameters to obtain a first rivet welding association characteristic coefficient, and specifically comprises the following steps: Acquiring historical similar part rivet welding strength information and historical similar part deformation information of the similar rivet welding characteristic part group under the condition of preset welding parameters; Counting actual similar component rivet welding strength information of the historical similar component rivet welding strength information which changes after the historical similar component rivet welding strength information is subjected to a preset welding process; Counting actual similar component deformation information of the change of the historical similar component deformation information after the preset welding process; Calculating a first strength change difference trend value between the actual similar part rivet welding strength information and the historical similar part rivet welding strength information; calculating a first deformation variation difference trend value between the actual similar part deformation amount information and the history similar part deformation amount information; A first rivet-welding association characteristic coefficient between the first strength variation difference trend value and the first deformation variation difference trend value is extracted.
4. The aluminum alloy rivet welding control method for a door frame structure of a vehicle body according to claim 3, wherein a history difference region rivet welding part is extracted according to a difference rivet welding feature part group, comprising the steps of: collecting a difference region rivet welding piece for rivet welding operation in the difference rivet welding characteristic component group; and screening out historical difference area rivet welding pieces from the difference area rivet welding pieces, wherein the difference rivet welding characteristic part groups of the historical difference area rivet welding pieces and the rivet welding process characteristic information in the similar rivet welding characteristic part groups are the same.
5. The aluminum alloy rivet welding control method for the vehicle door frame structure according to claim 4, wherein the correlation between the rivet welding strength and the deformation variation trend value of the rivet welding piece in the history difference area is processed and analyzed under the condition of preset welding parameters to obtain a second rivet welding correlation characteristic coefficient, and the method specifically comprises the following steps: collecting historical difference region rivet welding strength information and historical difference region deformation information of a historical difference region rivet welding piece; counting actual difference region rivet welding strength information of the historical difference region rivet welding strength information which changes after a preset welding process is carried out; counting actual difference region deformation information of the change of the history difference region deformation information after the history difference region deformation information is subjected to a preset welding process; calculating a second strength change difference trend value between the actual difference region rivet welding strength information and the historical difference region rivet welding strength information; Calculating a second deformation change difference trend value between the actual difference region deformation amount information and the history difference region deformation amount information; And extracting a second rivet welding association characteristic coefficient between the second strength change difference trend value and the second deformation change difference trend value.
6. The method for controlling aluminum alloy rivet welding of a door frame structure of a vehicle body according to claim 5, wherein the adaptive rivet welding parameter set is obtained by prediction, comprising the steps of: extracting at least two component areas of the rivet welding operation from the current component to be rivet welded according to the characteristic information of the aluminum alloy component, and outputting a preset rivet welding operation area set; Obtaining the belonging characteristic information of the corresponding rivet welding process according to the belonging characteristic information of each area in the preset rivet welding operation area set, and then outputting a preset process characteristic information set; And inputting the preset rivet welding operation region set and the preset process characteristic information set into a rivet welding quality control prediction model to obtain the self-adaptive rivet welding parameter set.
7. The method for controlling aluminum alloy rivet welding of a door frame structure of a vehicle body according to claim 6, wherein the overlapping rivet welding parameter part and the differential rivet welding parameter part are extracted from the adaptive rivet welding parameter set, specifically: and comparing the self-adaptive rivet welding parameter set with a preset rivet welding parameter set, and extracting a superposition rivet welding parameter part and a difference rivet welding parameter part.
8. The aluminum alloy rivet welding control method of a vehicle door frame structure according to claim 7, wherein the step of performing a verification process on the differential rivet welding parameter portion according to the first rivet welding correlation characteristic coefficient and the adaptive rivet welding parameter set to obtain a verification rivet welding parameter portion comprises the following steps: judging the quality standard reaching degree of the rivet welding of the differential rivet welding parameter part according to the first rivet welding association characteristic coefficient and the preset rivet welding parameter set to obtain a first quality standard reaching data set; judging the quality standard reaching degree of the rivet welding of the differential rivet welding parameter part according to the first rivet welding association characteristic coefficient and the self-adaptive rivet welding parameter set to obtain a second quality standard reaching data set; performing numerical descending order sorting on the first quality reaching scale data set and the second quality reaching scale data set to obtain quality reaching scale sorting results; And marking the rivet welding control parameter corresponding to the differential rivet welding parameter part in the quality reaching scale sorting result as a verification rivet welding parameter part.
9. An aluminum alloy rivet welding control system for a door frame structure of a vehicle body, which is applied to the aluminum alloy rivet welding control method for the door frame structure of the vehicle body as set forth in any one of claims 1 to 8, and is characterized by comprising: The acquisition module is used for acquiring characteristic information of an aluminum alloy part of the current door frame structure of the car body to be riveted and welded; The screening module is used for screening out similar rivet welding characteristic component groups and different rivet welding characteristic component groups according to the characteristic information of the aluminum alloy components, and counting the rivet welding point distribution characteristics of the similar rivet welding characteristic component groups to obtain a rivet point density distribution information set; The first processing module is used for processing and analyzing the association relation between the rivet welding strength and the deformation trend value of the similar rivet welding characteristic component group under the condition of preset welding parameters to obtain a first rivet welding association characteristic coefficient; The second processing module is used for extracting a historical difference region rivet welding part according to the difference rivet welding characteristic part group, and processing and analyzing the association relation between the rivet welding strength and the deformation variation trend value of the historical difference region rivet welding part under the condition of preset welding parameters to obtain a second rivet welding association characteristic coefficient; The prediction module is used for establishing a rivet welding quality control prediction model according to the rivet point density distribution information set, the first rivet welding association characteristic coefficient and the second rivet welding association characteristic coefficient, predicting to obtain a self-adaptive rivet welding parameter set, and extracting a superposition rivet welding parameter part and a difference rivet welding parameter part from the self-adaptive rivet welding parameter set; and the control module is used for carrying out verification treatment on the differential rivet welding parameter part according to the first rivet welding association characteristic coefficient and the self-adaptive rivet welding parameter set to obtain a verification rivet welding parameter part, carrying out parameter integration on the verification rivet welding parameter part and the superposition rivet welding parameter part, and outputting an aluminum alloy rivet welding control parameter result of the vehicle body door frame structure.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements an aluminum alloy rivet welding control method of a door frame structure of a vehicle body as set forth in any one of claims 1 to 8 when executing the program.

Description

Aluminum alloy rivet welding control method and system for car body door frame structure Technical Field The invention relates to the technical field of rivet welding, in particular to an aluminum alloy rivet welding control method and system for a door frame structure of a vehicle body. Background In the field of automobile manufacturing, a door frame of a vehicle body is used as a key bearing and protecting part of a whole vehicle structure, and an important life for guaranteeing the passive safety of the vehicle and maintaining the integral rigidity of the vehicle body is carried, so that the quality control of an aluminum alloy rivet welding process is paid attention to in industry for a long time. The aluminum alloy material becomes the first choice for the light weight of the vehicle body from the practical production scene, but the physical characteristics of high heat conductivity and large linear expansion coefficient make the rivet welding process challenging, the deformation of the parts is easy to be caused when the welding heat input is inaccurate, the traditional rivet welding control method is mostly dependent on the experience setting parameters of engineers, and under the condition that the characteristic difference of the aluminum alloy parts is not fully considered, the parts in different areas of the door frame of the vehicle body are subjected to the same rivet welding parameters, so that the rivet welding defects are easy to be caused, the rework cost and the production period are increased, namely the rivet welding parameters of the traditional method are difficult to adapt to the needs of diversified parts. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide an aluminum alloy rivet welding control method and system for a door frame structure of a vehicle body. In order to achieve the above purpose, the present invention provides the following technical solutions: an aluminum alloy rivet welding control method of a door frame structure of a vehicle body comprises the following steps: collecting characteristic information of an aluminum alloy part of a current car body door frame structure to be riveted and welded; screening out similar rivet welding characteristic component groups and different rivet welding characteristic component groups according to the characteristic information of the aluminum alloy components, and counting the rivet welding point distribution characteristics of the similar rivet welding characteristic component groups to obtain a rivet point density distribution information set; Carrying out processing analysis on the association relation between the rivet welding strength and the deformation variation trend value of the similar rivet welding characteristic component group under the condition of preset welding parameters to obtain a first rivet welding association characteristic coefficient; extracting a history difference region rivet welding part according to the difference rivet welding characteristic part group, and carrying out processing analysis on the association relation between the rivet welding strength and the deformation variation trend value of the history difference region rivet welding part under the condition of preset welding parameters to obtain a second rivet welding association characteristic coefficient; Establishing a rivet welding quality control prediction model according to the rivet point density distribution information set, the first rivet welding association characteristic coefficient and the second rivet welding association characteristic coefficient, predicting to obtain a self-adaptive rivet welding parameter set, and extracting a superposition rivet welding parameter part and a difference rivet welding parameter part from the self-adaptive rivet welding parameter set; And carrying out verification treatment on the differential rivet welding parameter part according to the first rivet welding association characteristic coefficient and the self-adaptive rivet welding parameter set to obtain a verification rivet welding parameter part, and outputting an aluminum alloy rivet welding control parameter result of the vehicle body door frame structure after carrying out parameter integration on the verification rivet welding parameter part and the superposition rivet welding parameter part. Preferably, the rivet welding point distribution characteristics of the similar rivet welding characteristic component group are counted to obtain a rivet point density distribution information set, and the method specifically comprises the following steps: counting the distribution density status information of the rivet welding points of the similar rivet welding characteristic component groups; and counting distribution characteristics of the sparse and dense distribution areas of the rivet points according to the dense distribution condition information of the rivet points to obtain a sparse and