A Solder Joint Arrangement Optimization Method Based on Solder Joint Force Uniformity

Abstract

The invention discloses a welding spot arrangement optimization method based on welding spot force-bearing homogenization. The welding spot arrangement optimization method comprises the steps of establishing a finite element model of an original welding structure which comprises a plurality of welding spots; applying a restriction and a load on the original welding structure in the finite element model, and obtaining force bearing condition of each welding spot; establishing a welding spot arrangement optimizing mathematical model for minimizing summation of stresses which are bear by all welding spots as an optimizing target in a manner that the contribution value of each welding spot is used as a design variable; determining whether a corresponding welding spot is reserved according to the contribution value of each welding spot, and obtaining optimized welding spot distribution. The welding spot arrangement optimization method is based on structure topology optimization design technology, so that uniform force bearing distribution of each welding spot after optimization is realized. On condition that dynamic strength, static strength and rigidity of a welded structure are ensured, the number of failed welding spot in the bearing process is effectively reduced and furthermore the number of the welding spots is reduced.

Description

technical field [0001] The invention relates to the field of auto parts processing, in particular to a solder joint arrangement optimization method based on the uniform stress of the solder joints. Background technique [0002] Resistance spot welding is a kind of pressure welding, which is most widely used in automobile production, such as body structure, seat frame structure, etc. In a typical body structure, there are usually 3,000 to 5,000 welds. The location of the welds directly affects the static and dynamic strength and stiffness of the structure, and the number of welds affects the complexity of the welding process of the structure. Therefore, under the condition of satisfying the static and dynamic strength and stiffness of the structure as a whole, reasonably arrange the positions of the solder joints, reduce the number of solder joints and the failure of the solder joints under load as much as possible, and improve the performance of the welded structure. , It i...

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Problems solved by technology

[0003] At present, the empirical design method is generally used to design the solder joint arrangement of the welded structure, and corrections are made by checking the stiffness, fatigue and other related properties of the structure, and there is a lack of reasonable and effective solder joint layout design methods.

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