Lap joint structure of multi-layer boards of car body

Abstract

The purpose of the present invention is to propose a new type of lap joint structure of multi-layer boards of the car body to solve defects such as virtual welding, weak welding or spatter caused by the local material thickness of the traditional multi-layer board lap joint structure of the car body, and the manufacturing problems brought about High cost, insufficient welding strength, loose structure and other problems. The overlapping structure of the multilayer panels of the vehicle body of the present invention includes the first layer, the second layer, ..., the (N-1)th layer and the Nth layer, the said N is greater than or equal to 4, the key lies in the said first layer The first layer, the second layer, and the third layer are stacked in sequence and welded and fixed to form the welding assembly of the initial product; the third layer, ..., the (N‑1)th layer are stacked in sequence, and Several through gaps are set at the same position; the Nth layer board is provided with a convex part at the position corresponding to the gap, and the convex part of the Nth layer board is inserted into the gap, and the Nth layer board and the initial The finished welding assembly is welded and fixed to form an overlapping structure of multi-layer panels of the car body.

Description

technical field [0001] The invention belongs to the technical field of automobile body structures, and in particular relates to an overlapping structure of multilayer boards of an automobile body. Background technique [0002] At present, the car body frame mostly adopts spot welding and CO 2 The welding method laps steel plates with different thicknesses from 0.7mm to 2.5mm, and through a large number of spot welding and a small amount of CO 2 Welding to form the body skeleton structure assembly of the passenger car (that is, the body-in-white removes the assembly parts to become the skeleton assembly). In the process of forming the skeleton of parts, there are a large number of overlapping structures of multi-layer boards (three-layer boards and more boards), resulting in a local material thickness exceeding 6mm. During the spot welding process, welding such as virtual welding and spatter are prone to occur defect. There are also some OEMs in China that use intermediate...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a new type of lap joint structure of multi-layer boards of the car body to solve defects such as virtual welding, weak welding or spatter caused by the local material thickness of the traditional multi-layer board lap joint structure of the car body, and the manufacturing problems brought about High cost, insufficient welding strength, loose structure, etc.

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